mirror of https://github.com/torvalds/linux.git
2195 Commits
| Author | SHA1 | Message | Date |
|---|---|---|---|
Steven Rostedt
|
4d6d0a6263 |
tracing: Remove redundant config HAVE_FTRACE_MCOUNT_RECORD
Ftrace is tightly coupled with architecture specific code because it requires the use of trampolines written in assembly. This means that when a new feature or optimization is made, it must be done for all architectures. To simplify the approach, CONFIG_HAVE_FTRACE_* configs are added to denote which architecture has the new enhancement so that other architectures can still function until they too have been updated. The CONFIG_HAVE_FTRACE_MCOUNT was added to help simplify the DYNAMIC_FTRACE work, but now every architecture that implements DYNAMIC_FTRACE also has HAVE_FTRACE_MCOUNT set too, making it redundant with the HAVE_DYNAMIC_FTRACE. Remove the HAVE_FTRACE_MCOUNT config and use DYNAMIC_FTRACE directly where applicable. Link: https://lore.kernel.org/all/20250703154916.48e3ada7@gandalf.local.home/ Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: https://lore.kernel.org/20250704104838.27a18690@gandalf.local.home Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org> |
|
Mike Rapoport (Microsoft)
|
47410d839f |
x86/Kconfig: only enable ROX cache in execmem when STRICT_MODULE_RWX is set
Currently ROX cache in execmem is enabled regardless of
STRICT_MODULE_RWX setting. This breaks an assumption that module memory
is writable when STRICT_MODULE_RWX is disabled, for instance for kernel
debuggin.
Only enable ROX cache in execmem when STRICT_MODULE_RWX is set to
restore the original behaviour of module text permissions.
Fixes:
|
|
Linus Torvalds
|
00c010e130 |
- The 11 patch series "Add folio_mk_pte()" from Matthew Wilcox
simplifies the act of creating a pte which addresses the first page in a folio and reduces the amount of plumbing which architecture must implement to provide this. - The 8 patch series "Misc folio patches for 6.16" from Matthew Wilcox is a shower of largely unrelated folio infrastructure changes which clean things up and better prepare us for future work. - The 3 patch series "memory,x86,acpi: hotplug memory alignment advisement" from Gregory Price adds early-init code to prevent x86 from leaving physical memory unused when physical address regions are not aligned to memory block size. - The 2 patch series "mm/compaction: allow more aggressive proactive compaction" from Michal Clapinski provides some tuning of the (sadly, hard-coded (more sadly, not auto-tuned)) thresholds for our invokation of proactive compaction. In a simple test case, the reduction of a guest VM's memory consumption was dramatic. - The 8 patch series "Minor cleanups and improvements to swap freeing code" from Kemeng Shi provides some code cleaups and a small efficiency improvement to this part of our swap handling code. - The 6 patch series "ptrace: introduce PTRACE_SET_SYSCALL_INFO API" from Dmitry Levin adds the ability for a ptracer to modify syscalls arguments. At this time we can alter only "system call information that are used by strace system call tampering, namely, syscall number, syscall arguments, and syscall return value. This series should have been incorporated into mm.git's "non-MM" branch, but I goofed. - The 3 patch series "fs/proc: extend the PAGEMAP_SCAN ioctl to report guard regions" from Andrei Vagin extends the info returned by the PAGEMAP_SCAN ioctl against /proc/pid/pagemap. This permits CRIU to more efficiently get at the info about guard regions. - The 2 patch series "Fix parameter passed to page_mapcount_is_type()" from Gavin Shan implements that fix. No runtime effect is expected because validate_page_before_insert() happens to fix up this error. - The 3 patch series "kernel/events/uprobes: uprobe_write_opcode() rewrite" from David Hildenbrand basically brings uprobe text poking into the current decade. Remove a bunch of hand-rolled implementation in favor of using more current facilities. - The 3 patch series "mm/ptdump: Drop assumption that pxd_val() is u64" from Anshuman Khandual provides enhancements and generalizations to the pte dumping code. This might be needed when 128-bit Page Table Descriptors are enabled for ARM. - The 12 patch series "Always call constructor for kernel page tables" from Kevin Brodsky "ensures that the ctor/dtor is always called for kernel pgtables, as it already is for user pgtables". This permits the addition of more functionality such as "insert hooks to protect page tables". This change does result in various architectures performing unnecesary work, but this is fixed up where it is anticipated to occur. - The 9 patch series "Rust support for mm_struct, vm_area_struct, and mmap" from Alice Ryhl adds plumbing to permit Rust access to core MM structures. - The 3 patch series "fix incorrectly disallowed anonymous VMA merges" from Lorenzo Stoakes takes advantage of some VMA merging opportunities which we've been missing for 15 years. - The 4 patch series "mm/madvise: batch tlb flushes for MADV_DONTNEED and MADV_FREE" from SeongJae Park optimizes process_madvise()'s TLB flushing. Instead of flushing each address range in the provided iovec, we batch the flushing across all the iovec entries. The syscall's cost was approximately halved with a microbenchmark which was designed to load this particular operation. - The 6 patch series "Track node vacancy to reduce worst case allocation counts" from Sidhartha Kumar makes the maple tree smarter about its node preallocation. stress-ng mmap performance increased by single-digit percentages and the amount of unnecessarily preallocated memory was dramaticelly reduced. - The 3 patch series "mm/gup: Minor fix, cleanup and improvements" from Baoquan He removes a few unnecessary things which Baoquan noted when reading the code. - The 3 patch series ""Enhance sysfs handling for memory hotplug in weighted interleave" from Rakie Kim "enhances the weighted interleave policy in the memory management subsystem by improving sysfs handling, fixing memory leaks, and introducing dynamic sysfs updates for memory hotplug support". Fixes things on error paths which we are unlikely to hit. - The 7 patch series "mm/damon: auto-tune DAMOS for NUMA setups including tiered memory" from SeongJae Park introduces new DAMOS quota goal metrics which eliminate the manual tuning which is required when utilizing DAMON for memory tiering. - The 5 patch series "mm/vmalloc.c: code cleanup and improvements" from Baoquan He provides cleanups and small efficiency improvements which Baoquan found via code inspection. - The 2 patch series "vmscan: enforce mems_effective during demotion" from Gregory Price "changes reclaim to respect cpuset.mems_effective during demotion when possible". because "presently, reclaim explicitly ignores cpuset.mems_effective when demoting, which may cause the cpuset settings to violated." "This is useful for isolating workloads on a multi-tenant system from certain classes of memory more consistently." - The 2 patch series ""Clean up split_huge_pmd_locked() and remove unnecessary folio pointers" from Gavin Guo provides minor cleanups and efficiency gains in in the huge page splitting and migrating code. - The 3 patch series "Use kmem_cache for memcg alloc" from Huan Yang creates a slab cache for `struct mem_cgroup', yielding improved memory utilization. - The 4 patch series "add max arg to swappiness in memory.reclaim and lru_gen" from Zhongkun He adds a new "max" argument to the "swappiness=" argument for memory.reclaim MGLRU's lru_gen. This directs proactive reclaim to reclaim from only anon folios rather than file-backed folios. - The 17 patch series "kexec: introduce Kexec HandOver (KHO)" from Mike Rapoport is the first step on the path to permitting the kernel to maintain existing VMs while replacing the host kernel via file-based kexec. At this time only memblock's reserve_mem is preserved. - The 7 patch series "mm: Introduce for_each_valid_pfn()" from David Woodhouse provides and uses a smarter way of looping over a pfn range. By skipping ranges of invalid pfns. - The 2 patch series "sched/numa: Skip VMA scanning on memory pinned to one NUMA node via cpuset.mems" from Libo Chen removes a lot of pointless VMA scanning when a task is pinned a single NUMA mode. Dramatic performance benefits were seen in some real world cases. - The 2 patch series "JFS: Implement migrate_folio for jfs_metapage_aops" from Shivank Garg addresses a warning which occurs during memory compaction when using JFS. - The 4 patch series "move all VMA allocation, freeing and duplication logic to mm" from Lorenzo Stoakes moves some VMA code from kernel/fork.c into the more appropriate mm/vma.c. - The 6 patch series "mm, swap: clean up swap cache mapping helper" from Kairui Song provides code consolidation and cleanups related to the folio_index() function. - The 2 patch series "mm/gup: Cleanup memfd_pin_folios()" from Vishal Moola does that. - The 8 patch series "memcg: Fix test_memcg_min/low test failures" from Waiman Long addresses some bogus failures which are being reported by the test_memcontrol selftest. - The 3 patch series "eliminate mmap() retry merge, add .mmap_prepare hook" from Lorenzo Stoakes commences the deprecation of file_operations.mmap() in favor of the new file_operations.mmap_prepare(). The latter is more restrictive and prevents drivers from messing with things in ways which, amongst other problems, may defeat VMA merging. - The 4 patch series "memcg: decouple memcg and objcg stocks"" from Shakeel Butt decouples the per-cpu memcg charge cache from the objcg's one. This is a step along the way to making memcg and objcg charging NMI-safe, which is a BPF requirement. - The 6 patch series "mm/damon: minor fixups and improvements for code, tests, and documents" from SeongJae Park is "yet another batch of miscellaneous DAMON changes. Fix and improve minor problems in code, tests and documents." - The 7 patch series "memcg: make memcg stats irq safe" from Shakeel Butt converts memcg stats to be irq safe. Another step along the way to making memcg charging and stats updates NMI-safe, a BPF requirement. - The 4 patch series "Let unmap_hugepage_range() and several related functions take folio instead of page" from Fan Ni provides folio conversions in the hugetlb code. -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQTTMBEPP41GrTpTJgfdBJ7gKXxAjgUCaDt5qgAKCRDdBJ7gKXxA ju6XAP9nTiSfRz8Cz1n5LJZpFKEGzLpSihCYyR6P3o1L9oe3mwEAlZ5+XAwk2I5x Qqb/UGMEpilyre1PayQqOnct3aSL9Ao= =tYYm -----END PGP SIGNATURE----- Merge tag 'mm-stable-2025-05-31-14-50' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull MM updates from Andrew Morton: - "Add folio_mk_pte()" from Matthew Wilcox simplifies the act of creating a pte which addresses the first page in a folio and reduces the amount of plumbing which architecture must implement to provide this. - "Misc folio patches for 6.16" from Matthew Wilcox is a shower of largely unrelated folio infrastructure changes which clean things up and better prepare us for future work. - "memory,x86,acpi: hotplug memory alignment advisement" from Gregory Price adds early-init code to prevent x86 from leaving physical memory unused when physical address regions are not aligned to memory block size. - "mm/compaction: allow more aggressive proactive compaction" from Michal Clapinski provides some tuning of the (sadly, hard-coded (more sadly, not auto-tuned)) thresholds for our invokation of proactive compaction. In a simple test case, the reduction of a guest VM's memory consumption was dramatic. - "Minor cleanups and improvements to swap freeing code" from Kemeng Shi provides some code cleaups and a small efficiency improvement to this part of our swap handling code. - "ptrace: introduce PTRACE_SET_SYSCALL_INFO API" from Dmitry Levin adds the ability for a ptracer to modify syscalls arguments. At this time we can alter only "system call information that are used by strace system call tampering, namely, syscall number, syscall arguments, and syscall return value. This series should have been incorporated into mm.git's "non-MM" branch, but I goofed. - "fs/proc: extend the PAGEMAP_SCAN ioctl to report guard regions" from Andrei Vagin extends the info returned by the PAGEMAP_SCAN ioctl against /proc/pid/pagemap. This permits CRIU to more efficiently get at the info about guard regions. - "Fix parameter passed to page_mapcount_is_type()" from Gavin Shan implements that fix. No runtime effect is expected because validate_page_before_insert() happens to fix up this error. - "kernel/events/uprobes: uprobe_write_opcode() rewrite" from David Hildenbrand basically brings uprobe text poking into the current decade. Remove a bunch of hand-rolled implementation in favor of using more current facilities. - "mm/ptdump: Drop assumption that pxd_val() is u64" from Anshuman Khandual provides enhancements and generalizations to the pte dumping code. This might be needed when 128-bit Page Table Descriptors are enabled for ARM. - "Always call constructor for kernel page tables" from Kevin Brodsky ensures that the ctor/dtor is always called for kernel pgtables, as it already is for user pgtables. This permits the addition of more functionality such as "insert hooks to protect page tables". This change does result in various architectures performing unnecesary work, but this is fixed up where it is anticipated to occur. - "Rust support for mm_struct, vm_area_struct, and mmap" from Alice Ryhl adds plumbing to permit Rust access to core MM structures. - "fix incorrectly disallowed anonymous VMA merges" from Lorenzo Stoakes takes advantage of some VMA merging opportunities which we've been missing for 15 years. - "mm/madvise: batch tlb flushes for MADV_DONTNEED and MADV_FREE" from SeongJae Park optimizes process_madvise()'s TLB flushing. Instead of flushing each address range in the provided iovec, we batch the flushing across all the iovec entries. The syscall's cost was approximately halved with a microbenchmark which was designed to load this particular operation. - "Track node vacancy to reduce worst case allocation counts" from Sidhartha Kumar makes the maple tree smarter about its node preallocation. stress-ng mmap performance increased by single-digit percentages and the amount of unnecessarily preallocated memory was dramaticelly reduced. - "mm/gup: Minor fix, cleanup and improvements" from Baoquan He removes a few unnecessary things which Baoquan noted when reading the code. - ""Enhance sysfs handling for memory hotplug in weighted interleave" from Rakie Kim "enhances the weighted interleave policy in the memory management subsystem by improving sysfs handling, fixing memory leaks, and introducing dynamic sysfs updates for memory hotplug support". Fixes things on error paths which we are unlikely to hit. - "mm/damon: auto-tune DAMOS for NUMA setups including tiered memory" from SeongJae Park introduces new DAMOS quota goal metrics which eliminate the manual tuning which is required when utilizing DAMON for memory tiering. - "mm/vmalloc.c: code cleanup and improvements" from Baoquan He provides cleanups and small efficiency improvements which Baoquan found via code inspection. - "vmscan: enforce mems_effective during demotion" from Gregory Price changes reclaim to respect cpuset.mems_effective during demotion when possible. because presently, reclaim explicitly ignores cpuset.mems_effective when demoting, which may cause the cpuset settings to violated. This is useful for isolating workloads on a multi-tenant system from certain classes of memory more consistently. - "Clean up split_huge_pmd_locked() and remove unnecessary folio pointers" from Gavin Guo provides minor cleanups and efficiency gains in in the huge page splitting and migrating code. - "Use kmem_cache for memcg alloc" from Huan Yang creates a slab cache for `struct mem_cgroup', yielding improved memory utilization. - "add max arg to swappiness in memory.reclaim and lru_gen" from Zhongkun He adds a new "max" argument to the "swappiness=" argument for memory.reclaim MGLRU's lru_gen. This directs proactive reclaim to reclaim from only anon folios rather than file-backed folios. - "kexec: introduce Kexec HandOver (KHO)" from Mike Rapoport is the first step on the path to permitting the kernel to maintain existing VMs while replacing the host kernel via file-based kexec. At this time only memblock's reserve_mem is preserved. - "mm: Introduce for_each_valid_pfn()" from David Woodhouse provides and uses a smarter way of looping over a pfn range. By skipping ranges of invalid pfns. - "sched/numa: Skip VMA scanning on memory pinned to one NUMA node via cpuset.mems" from Libo Chen removes a lot of pointless VMA scanning when a task is pinned a single NUMA mode. Dramatic performance benefits were seen in some real world cases. - "JFS: Implement migrate_folio for jfs_metapage_aops" from Shivank Garg addresses a warning which occurs during memory compaction when using JFS. - "move all VMA allocation, freeing and duplication logic to mm" from Lorenzo Stoakes moves some VMA code from kernel/fork.c into the more appropriate mm/vma.c. - "mm, swap: clean up swap cache mapping helper" from Kairui Song provides code consolidation and cleanups related to the folio_index() function. - "mm/gup: Cleanup memfd_pin_folios()" from Vishal Moola does that. - "memcg: Fix test_memcg_min/low test failures" from Waiman Long addresses some bogus failures which are being reported by the test_memcontrol selftest. - "eliminate mmap() retry merge, add .mmap_prepare hook" from Lorenzo Stoakes commences the deprecation of file_operations.mmap() in favor of the new file_operations.mmap_prepare(). The latter is more restrictive and prevents drivers from messing with things in ways which, amongst other problems, may defeat VMA merging. - "memcg: decouple memcg and objcg stocks"" from Shakeel Butt decouples the per-cpu memcg charge cache from the objcg's one. This is a step along the way to making memcg and objcg charging NMI-safe, which is a BPF requirement. - "mm/damon: minor fixups and improvements for code, tests, and documents" from SeongJae Park is yet another batch of miscellaneous DAMON changes. Fix and improve minor problems in code, tests and documents. - "memcg: make memcg stats irq safe" from Shakeel Butt converts memcg stats to be irq safe. Another step along the way to making memcg charging and stats updates NMI-safe, a BPF requirement. - "Let unmap_hugepage_range() and several related functions take folio instead of page" from Fan Ni provides folio conversions in the hugetlb code. * tag 'mm-stable-2025-05-31-14-50' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (285 commits) mm: pcp: increase pcp->free_count threshold to trigger free_high mm/hugetlb: convert use of struct page to folio in __unmap_hugepage_range() mm/hugetlb: refactor __unmap_hugepage_range() to take folio instead of page mm/hugetlb: refactor unmap_hugepage_range() to take folio instead of page mm/hugetlb: pass folio instead of page to unmap_ref_private() memcg: objcg stock trylock without irq disabling memcg: no stock lock for cpu hot-unplug memcg: make __mod_memcg_lruvec_state re-entrant safe against irqs memcg: make count_memcg_events re-entrant safe against irqs memcg: make mod_memcg_state re-entrant safe against irqs memcg: move preempt disable to callers of memcg_rstat_updated memcg: memcg_rstat_updated re-entrant safe against irqs mm: khugepaged: decouple SHMEM and file folios' collapse selftests/eventfd: correct test name and improve messages alloc_tag: check mem_profiling_support in alloc_tag_init Docs/damon: update titles and brief introductions to explain DAMOS selftests/damon/_damon_sysfs: read tried regions directories in order mm/damon/tests/core-kunit: add a test for damos_set_filters_default_reject() mm/damon/paddr: remove unused variable, folio_list, in damon_pa_stat() mm/damon/sysfs-schemes: fix wrong comment on damons_sysfs_quota_goal_metric_strs ... |
|
|
Linus Torvalds
|
bbd9c366bf |
* Make SGX less likely to induce fatal machine checks
* Use much more compact SHA-256 library API -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEV76QKkVc4xCGURexaDWVMHDJkrAFAmg4oWMACgkQaDWVMHDJ krDmaQ/9ESbv6zhDZJDwBk2mO9fWKWsHVPjDSa9JdTZvfh/X4XDVc0cLbXI02D7H 7yd0eouresljayhybsoPAbpWydepDXXP7bGfDQlC5zsXuPs7+I2gYRUHyTvu316Z 7dQjTJ/QvlqEHGVa0SPt5cBj4pdCwd41uo/kFiEVI3a6EpbsgHZKPk83xchdXzE0 Egy/evnDq1t1Fnc2Aq3/r87pHqSSCv5AHT8LYbQvW1mIURcp1Ik6FvmDdSPV9jhd QOTBjFHqh8Mmteqtxfl1/Uq0sa05dYvbiBHvawbC7spYe0VNhfpAfSULOBAHA5Mg scw+MoARj6LcDV0pOXKb36RI7UME6B8/uV0MVYEepRRwFfXnK/LlmAEYmh8XQg55 IxsRHsj6fvnEVruuoeJDOKhR0wLMwIogmkPthfqj6hokDdipme2FMxZOwuLqtvwo bVB4Xrgjlfsab+t54bQFfYIbiVM/1sKfwEFRF1FbW5leLGHQhyzJ5oT6LKdqey5z 6rZpWRATQuwLxwjfK6WeiY+p+k8dAHh/ngg5uXcXkD2xlKDnvlR+L1/cSixyyoaf peTCgXTZs21rOY4WMPx+SzwHWlMrOK7Umd3m3QwHzdIy7aWWtqlUBR3PoKq/7c1o 6VZRMiVIUscJy+m6fap4ZyWgatvIRGoSkQMBCDoZcAZ4f/9QxRA= =h5H1 -----END PGP SIGNATURE----- Merge tag 'x86_sgx_for_6.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull Intel software guard extension (SGX) updates from Dave Hansen: "A couple of x86/sgx changes. The first one is a no-brainer to use the (simple) SHA-256 library. For the second one, some folks doing testing noticed that SGX systems under memory pressure were inducing fatal machine checks at pretty unnerving rates, despite the SGX code having _some_ awareness of memory poison. It turns out that the SGX reclaim path was not checking for poison _and_ it always accesses memory to copy it around. Make sure that poisoned pages are not reclaimed" * tag 'x86_sgx_for_6.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/sgx: Prevent attempts to reclaim poisoned pages x86/sgx: Use SHA-256 library API instead of crypto_shash API |
|
|
Linus Torvalds
|
3702a515ed |
ACPI updates for 6.16-rc1
- Fix two ACPICA SLAB cache leaks (Seunghun Han).
- Add EINJv2 get error type action and define Error Injection Actions
in hex values to avoid inconsistencies between the specification and
the code (Zaid Alali).
- Fix typo in comments for SRAT structures (Adam Lackorzynski).
- Prevent possible loss of data in ACPICA because of u32 to u8
conversions (Saket Dumbre).
- Fix reading FFixedHW operation regions in ACPICA (Daniil Tatianin).
- Add support for printing AML arguments when the ACPICA debug level is
ACPI_LV_TRACE_POINT (Mario Limonciello).
- Drop a stale comment about the file content from actbl2.h (Sudeep
Holla).
- Apply pack(1) to union aml_resource (Tamir Duberstein).
- Fix overflow check in the ACPICA version of vsnprintf() (gldrk).
- Interpret SIDP structures in DMAR added revision 3.4 of the VT-d
specification (Alexey Neyman).
- Add typedef and other definitions related to MRRM to ACPICA (Tony
Luck).
- Add definitions for RIMT to ACPICA (Sunil V L).
- Fix spelling mistake "Incremement" -> "Increment" in the ACPICA
utilities code (Colin Ian King).
- Add typedef and other definitions for ERDT to ACPICA (Tony Luck).
- Introduce ACPI_NONSTRING and use it (Kees Cook, Ahmed Salem).
- Rename structure and field names of the RAS2 table in actbl2.h (Shiju
Jose).
- Fix up whitespace in acpica/utcache.c (Zhe Qiao).
- Avoid sequence overread in a call to strncmp() in ap_get_table_length()
and replace strncpy() with memcpy() in ACPICA in some places (Ahmed
Salem).
- Update copyright year in all ACPICA files (Saket Dumbre).
- Add __nonstring annotations for unterminated strings in the static
ACPI tables parsing code (Kees Cook).
- Add support for parsing the MRRM ACPI table and sysfs files to
describe memory regions listed in it (Tony Luck, Anil Keshavamurthy).
- Remove an (explicitly) unused header file include from the VIOT ACPI
table parser file (Andy Shevchenko).
- Improve logging around acpi_initialize_tables() (Bartosz Szczepanek).
- Clean up the initialization of CPU data structures in the ACPI
processor driver (Zhang Rui).
- Remove an obsolete comment regarding the C-states handling in the
ACPI processor driver (Giovanni Gherdovich).
- Simplify PCC shared memory region handling (Sudeep Holla).
- Rework and extend functions for reading CPPC register values and for
updating CPPC registers (Lifeng Zheng).
- Add three functions related to autonomous CPU performance state
selection to the CPPC library (Lifeng Zheng).
- Turn the acpi_pci_root_remap_iospace() fwnode_handle parameter into a
const pointer (Pei Xiao).
- Round battery capacity percengate in the ACPI battery driver to the
closest integer to avoid user confusion (shitao).
- Make the ACPI battery driver report the current as a negative number
to the power supply framework when the battery is discharging as
documented (Peter Marheine).
- Add TUXEDO InfinityBook Pro AMD Gen9 to the acpi_ec_no_wakeup[] list
to prevent spurious wakeups from suspend-to-idle (Werner Sembach).
- Convert the APEI EINJ driver to a faux device one (Sudeep Holla, Jon
Hunter).
- Remove redundant calls to einj_get_available_error_type() from the
APEI EINJ driver (Zaid Alali).
- Fix a typo for MECHREVO in irq1_edge_low_force_override[] (Mingcong
Bai).
- Add an LPS0 check() callback to the AMD pinctrl driver and fix up
config symbol dependencies in it (Mario Limonciello, Rafael Wysocki).
- Avoid initializing the ACPI platform profile driver on non-ACPI
platforms (Alexandre Ghiti).
- Document that references to ACPI data (non-device) nodes should use
string-only references in hierarchical data node packages (Sakari
Ailus).
- Fail the ACPI bus registration if acpi_kobj registration fails (Armin
Wolf).
-----BEGIN PGP SIGNATURE-----
iQFGBAABCAAwFiEEcM8Aw/RY0dgsiRUR7l+9nS/U47UFAmg0rlUSHHJqd0Byand5
c29ja2kubmV0AAoJEO5fvZ0v1OO16GUH/jtsD33u0tSopncGA+MYQO/rd3MA1sW0
2W9NACvdPDtoOpDiKLa3ptw6FaicJMrPvghZ6LMZ1Wjt3JKqjGZLtj5zzZcCaCxt
34UOwr1V4FUDNQ7mfXRMRdwDnGj5UCaBLV80fekwr8gYhfEWM5F9MpeRuFR4QOAf
HGvmtI8NCAaYn2utHSvP/XkH2+C257k5lbdt1PMnQg7E7iQBoz3Nn39EuQ2MrkFN
1YEZzBR2wZkfQRTf1ZeK6SFKixNKCtDAJj7YcnKhwafj5YKvynr8EnuMDNc9B4Xh
dFGj9P/Jkxyol7sJqC+CjdyhDCY24cSBbk/+naCsInD0taSdK/FJW+w=
=/Ek0
-----END PGP SIGNATURE-----
Merge tag 'acpi-6.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI updates from Rafael Wysocki:
"The most significant part of these changes is an ACPICA update
covering two upstream ACPICA releases, 20241212 and 20250404, that
have not been included into the kernel code base yet.
Among other things, it adds definitions needed to address GCC 15's
-Wunterminated-string-initialization warnings, adds support for three
new tables (MRRM, ERDT, RIMT), extends support for two tables (RAS2,
DMAR), and fixes some issues.
On top of the above, there is a new parser for the MRRM table, more
changes related to GCC 15's -Wunterminated-string-initialization
warnings, a CPPC library update including functions related to
autonomous CPU performance state selection, a couple of new quirks,
some assorted fixes and some code cleanups.
Specifics:
- Fix two ACPICA SLAB cache leaks (Seunghun Han)
- Add EINJv2 get error type action and define Error Injection Actions
in hex values to avoid inconsistencies between the specification
and the code (Zaid Alali)
- Fix typo in comments for SRAT structures (Adam Lackorzynski)
- Prevent possible loss of data in ACPICA because of u32 to u8
conversions (Saket Dumbre)
- Fix reading FFixedHW operation regions in ACPICA (Daniil Tatianin)
- Add support for printing AML arguments when the ACPICA debug level
is ACPI_LV_TRACE_POINT (Mario Limonciello)
- Drop a stale comment about the file content from actbl2.h (Sudeep
Holla)
- Apply pack(1) to union aml_resource (Tamir Duberstein)
- Fix overflow check in the ACPICA version of vsnprintf() (gldrk)
- Interpret SIDP structures in DMAR added revision 3.4 of the VT-d
specification (Alexey Neyman)
- Add typedef and other definitions related to MRRM to ACPICA (Tony
Luck)
- Add definitions for RIMT to ACPICA (Sunil V L)
- Fix spelling mistake "Incremement" -> "Increment" in the ACPICA
utilities code (Colin Ian King)
- Add typedef and other definitions for ERDT to ACPICA (Tony Luck)
- Introduce ACPI_NONSTRING and use it (Kees Cook, Ahmed Salem)
- Rename structure and field names of the RAS2 table in actbl2.h
(Shiju Jose)
- Fix up whitespace in acpica/utcache.c (Zhe Qiao)
- Avoid sequence overread in a call to strncmp() in
ap_get_table_length() and replace strncpy() with memcpy() in ACPICA
in some places (Ahmed Salem)
- Update copyright year in all ACPICA files (Saket Dumbre)
- Add __nonstring annotations for unterminated strings in the static
ACPI tables parsing code (Kees Cook)
- Add support for parsing the MRRM ACPI table and sysfs files to
describe memory regions listed in it (Tony Luck, Anil
Keshavamurthy)
- Remove an (explicitly) unused header file include from the VIOT
ACPI table parser file (Andy Shevchenko)
- Improve logging around acpi_initialize_tables() (Bartosz
Szczepanek)
- Clean up the initialization of CPU data structures in the ACPI
processor driver (Zhang Rui)
- Remove an obsolete comment regarding the C-states handling in the
ACPI processor driver (Giovanni Gherdovich)
- Simplify PCC shared memory region handling (Sudeep Holla)
- Rework and extend functions for reading CPPC register values and
for updating CPPC registers (Lifeng Zheng)
- Add three functions related to autonomous CPU performance state
selection to the CPPC library (Lifeng Zheng)
- Turn the acpi_pci_root_remap_iospace() fwnode_handle parameter into
a const pointer (Pei Xiao)
- Round battery capacity percengate in the ACPI battery driver to the
closest integer to avoid user confusion (shitao)
- Make the ACPI battery driver report the current as a negative
number to the power supply framework when the battery is
discharging as documented (Peter Marheine)
- Add TUXEDO InfinityBook Pro AMD Gen9 to the acpi_ec_no_wakeup[]
list to prevent spurious wakeups from suspend-to-idle (Werner
Sembach)
- Convert the APEI EINJ driver to a faux device one (Sudeep Holla,
Jon Hunter)
- Remove redundant calls to einj_get_available_error_type() from the
APEI EINJ driver (Zaid Alali)
- Fix a typo for MECHREVO in irq1_edge_low_force_override[] (Mingcong
Bai)
- Add an LPS0 check() callback to the AMD pinctrl driver and fix up
config symbol dependencies in it (Mario Limonciello, Rafael
Wysocki)
- Avoid initializing the ACPI platform profile driver on non-ACPI
platforms (Alexandre Ghiti)
- Document that references to ACPI data (non-device) nodes should use
string-only references in hierarchical data node packages (Sakari
Ailus)
- Fail the ACPI bus registration if acpi_kobj registration fails
(Armin Wolf)"
* tag 'acpi-6.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (65 commits)
ACPI: MRRM: Fix default max memory region
ACPI: bus: Bail out if acpi_kobj registration fails
ACPI: platform_profile: Avoid initializing on non-ACPI platforms
pinctrl: amd: Fix hibernation support with CONFIG_SUSPEND unset
ACPI: tables: Improve logging around acpi_initialize_tables()
ACPI: VIOT: Remove (explicitly) unused header
ACPI: Add documentation for exposing MRRM data
ACPI: MRRM: Add /sys files to describe memory ranges
ACPI: MRRM: Minimal parse of ACPI MRRM table
ACPICA: Update copyright year
ACPICA: Logfile: Changes for version 20250404
ACPICA: Replace strncpy() with memcpy()
ACPICA: Apply ACPI_NONSTRING in more places
ACPICA: Avoid sequence overread in call to strncmp()
ACPICA: Adjust the position of code lines
ACPICA: actbl2.h: ACPI 6.5: RAS2: Rename structure and field names of the RAS2 table
ACPICA: Apply ACPI_NONSTRING
ACPICA: Introduce ACPI_NONSTRING
ACPICA: actbl2.h: ERDT: Add typedef and other definitions
ACPICA: infrastructure: Add new DMT_BUF types and shorten a long name
...
|
|
|
Linus Torvalds
|
664a231d90 |
Carve out the resctrl filesystem-related code into fs/resctrl/ so that
multiple architectures can share the fs API for manipulating their
respective hw resource control implementation. This is the second step
in the work towards sharing the resctrl filesystem interface, the next
one being plugging ARM's MPAM into the aforementioned fs API.
-----BEGIN PGP SIGNATURE-----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=eNCr
-----END PGP SIGNATURE-----
Merge tag 'x86_cache_for_v6.16_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 resource control updates from Borislav Petkov:
"Carve out the resctrl filesystem-related code into fs/resctrl/ so that
multiple architectures can share the fs API for manipulating their
respective hw resource control implementation.
This is the second step in the work towards sharing the resctrl
filesystem interface, the next one being plugging ARM's MPAM into the
aforementioned fs API"
* tag 'x86_cache_for_v6.16_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (25 commits)
MAINTAINERS: Add reviewers for fs/resctrl
x86,fs/resctrl: Move the resctrl filesystem code to live in /fs/resctrl
x86/resctrl: Always initialise rid field in rdt_resources_all[]
x86/resctrl: Relax some asm #includes
x86/resctrl: Prefer alloc(sizeof(*foo)) idiom in rdt_init_fs_context()
x86/resctrl: Squelch whitespace anomalies in resctrl core code
x86/resctrl: Move pseudo lock prototypes to include/linux/resctrl.h
x86/resctrl: Fix types in resctrl_arch_mon_ctx_{alloc,free}() stubs
x86/resctrl: Move enum resctrl_event_id to resctrl.h
x86/resctrl: Move the filesystem bits to headers visible to fs/resctrl
fs/resctrl: Add boiler plate for external resctrl code
x86/resctrl: Add 'resctrl' to the title of the resctrl documentation
x86/resctrl: Split trace.h
x86/resctrl: Expand the width of domid by replacing mon_data_bits
x86/resctrl: Add end-marker to the resctrl_event_id enum
x86/resctrl: Move is_mba_sc() out of core.c
x86/resctrl: Drop __init/__exit on assorted symbols
x86/resctrl: Resctrl_exit() teardown resctrl but leave the mount point
x86/resctrl: Check all domains are offline in resctrl_exit()
x86/resctrl: Rename resctrl_sched_in() to begin with "resctrl_arch_"
...
|
|
Rafael J. Wysocki
|
5349b0051b |
Merge branch 'acpi-tables'
Merge updates related to the handling of static (data-only) ACPI tables for 6.16-rc1: - Add __nonstring annotations for unterminated strings in the static ACPI tables parsing code (Kees Cook). - Add support for parsing the MRRM ACPI table and sysfs files to describe memory regions listed in it (Tony Luck, Anil Keshavamurthy). - Remove an (explicitly) unused header file include from the VIOT ACPI table parser file (Andy Shevchenko). - Improve logging around acpi_initialize_tables() (Bartosz Szczepanek). * acpi-tables: ACPI: MRRM: Fix default max memory region ACPI: tables: Improve logging around acpi_initialize_tables() ACPI: VIOT: Remove (explicitly) unused header ACPI: Add documentation for exposing MRRM data ACPI: MRRM: Add /sys files to describe memory ranges ACPI: MRRM: Minimal parse of ACPI MRRM table ACPI: tables: Add __nonstring annotations for unterminated strings |
|
Kirill A. Shutemov
|
09230b7554 |
x86/paravirt: Restrict PARAVIRT_XXL to 64-bit only
PARAVIRT_XXL is exclusively utilized by XEN_PV, which is only compatible with 64-bit machines. Clearly designate PARAVIRT_XXL as 64-bit only and remove ifdefs to support CONFIG_PGTABLE_LEVELS < 5. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Reviewed-by: Juergen Gross <jgross@suse.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: https://lore.kernel.org/r/20250516123306.3812286-5-kirill.shutemov@linux.intel.com |
|
|
Kirill A. Shutemov
|
7212b58d6d |
x86/mm/64: Make 5-level paging support unconditional
Both Intel and AMD CPUs support 5-level paging, which is expected to become more widely adopted in the future. All major x86 Linux distributions have the feature enabled. Remove CONFIG_X86_5LEVEL and related #ifdeffery for it to make it more readable. Suggested-by: Borislav Petkov <bp@alien8.de> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Reviewed-by: Ard Biesheuvel <ardb@kernel.org> Reviewed-by: Borislav Petkov (AMD) <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: https://lore.kernel.org/r/20250516123306.3812286-4-kirill.shutemov@linux.intel.com |
|
|
Kirill A. Shutemov
|
cba5d9b3e9 |
x86/mm/64: Make SPARSEMEM_VMEMMAP the only memory model
5-level paging only supports SPARSEMEM_VMEMMAP. CONFIG_X86_5LEVEL is being phased out, making 5-level paging support mandatory. Make CONFIG_SPARSEMEM_VMEMMAP mandatory for x86-64 and eliminate any associated conditional statements. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Reviewed-by: Ard Biesheuvel <ardb@kernel.org> Reviewed-by: Borislav Petkov (AMD) <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: https://lore.kernel.org/r/20250516123306.3812286-3-kirill.shutemov@linux.intel.com |
|
|
Kirill A. Shutemov
|
1bffe6f689 |
x86/mm/64: Always use dynamic memory layout
Dynamic memory layout is used by KASLR and 5-level paging. CONFIG_X86_5LEVEL is going to be removed, making 5-level paging support unconditional which requires unconditional support of dynamic memory layout. Remove CONFIG_DYNAMIC_MEMORY_LAYOUT. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Reviewed-by: Ard Biesheuvel <ardb@kernel.org> Reviewed-by: Borislav Petkov (AMD) <bp@alien8.de> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Kieran Bingham <kbingham@kernel.org> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: https://lore.kernel.org/r/20250516123306.3812286-2-kirill.shutemov@linux.intel.com |
|
James Morse
|
bff70402d6 |
fs/resctrl: Add boiler plate for external resctrl code
Add Makefile and Kconfig for fs/resctrl. Add ARCH_HAS_CPU_RESCTRL for the common parts of the resctrl interface and make X86_CPU_RESCTRL select this. Adding an include of asm/resctrl.h to linux/resctrl.h allows the /fs/resctrl files to switch over to using this header instead. Co-developed-by: Dave Martin <Dave.Martin@arm.com> Signed-off-by: Dave Martin <Dave.Martin@arm.com> Signed-off-by: James Morse <james.morse@arm.com> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Reviewed-by: Shaopeng Tan <tan.shaopeng@jp.fujitsu.com> Reviewed-by: Tony Luck <tony.luck@intel.com> Reviewed-by: Fenghua Yu <fenghuay@nvidia.com> Reviewed-by: Reinette Chatre <reinette.chatre@intel.com> Tested-by: Fenghua Yu <fenghuay@nvidia.com> Tested-by: Carl Worth <carl@os.amperecomputing.com> # arm64 Tested-by: Shaopeng Tan <tan.shaopeng@jp.fujitsu.com> Tested-by: Peter Newman <peternewman@google.com> Tested-by: Amit Singh Tomar <amitsinght@marvell.com> # arm64 Tested-by: Shanker Donthineni <sdonthineni@nvidia.com> # arm64 Tested-by: Babu Moger <babu.moger@amd.com> Tested-by: Tony Luck <tony.luck@intel.com> Link: https://lore.kernel.org/20250515165855.31452-16-james.morse@arm.com |
|
Ingo Molnar
|
c4070e1996 |
Merge commit 'its-for-linus-20250509-merge' into x86/core, to resolve conflicts
Conflicts: Documentation/admin-guide/hw-vuln/index.rst arch/x86/include/asm/cpufeatures.h arch/x86/kernel/alternative.c arch/x86/kernel/cpu/bugs.c arch/x86/kernel/cpu/common.c drivers/base/cpu.c include/linux/cpu.h Signed-off-by: Ingo Molnar <mingo@kernel.org> |
|
|
Ingo Molnar
|
11d8f542d9 |
Merge branch 'x86/alternatives' into x86/core, to merge dependent commits
Prepare to resolve conflicts with an upstream series of fixes that conflict
with pending x86 changes:
|
|
Alexander Graf
|
2b082d6f62 |
x86/Kconfig: enable kexec handover for 64 bits
Add ARCH_SUPPORTS_KEXEC_HANDOVER for 64 bits to allow enabling of KEXEC_HANDOVER configuration option. Link: https://lkml.kernel.org/r/20250509074635.3187114-15-changyuanl@google.com Signed-off-by: Alexander Graf <graf@amazon.com> Co-developed-by: Mike Rapoport (Microsoft) <rppt@kernel.org> Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org> Co-developed-by: Changyuan Lyu <changyuanl@google.com> Signed-off-by: Changyuan Lyu <changyuanl@google.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Anthony Yznaga <anthony.yznaga@oracle.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Ashish Kalra <ashish.kalra@amd.com> Cc: Ben Herrenschmidt <benh@kernel.crashing.org> Cc: Borislav Betkov <bp@alien8.de> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Eric Biederman <ebiederm@xmission.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Gowans <jgowans@amazon.com> Cc: Jason Gunthorpe <jgg@nvidia.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Krzysztof Kozlowski <krzk@kernel.org> Cc: Marc Rutland <mark.rutland@arm.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Pasha Tatashin <pasha.tatashin@soleen.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Pratyush Yadav <ptyadav@amazon.de> Cc: Rob Herring <robh@kernel.org> Cc: Saravana Kannan <saravanak@google.com> Cc: Stanislav Kinsburskii <skinsburskii@linux.microsoft.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Thomas Gleinxer <tglx@linutronix.de> Cc: Thomas Lendacky <thomas.lendacky@amd.com> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
|
Tony Luck
|
b9020bdb9f |
ACPI: MRRM: Minimal parse of ACPI MRRM table
The resctrl file system code needs to know how many region tags are supported. Parse the ACPI MRRM table and save the max_mem_region value. Provide a function for resctrl to collect that value. Signed-off-by: Tony Luck <tony.luck@intel.com> Link: https://patch.msgid.link/20250505173819.419271-2-tony.luck@intel.com Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
|
|
Linus Torvalds
|
6f5bf947ba |
* Mitigate Indirect Target Selection (ITS) issue
-----BEGIN PGP SIGNATURE-----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=UVgZ
-----END PGP SIGNATURE-----
Merge tag 'its-for-linus-20250509' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 ITS mitigation from Dave Hansen:
"Mitigate Indirect Target Selection (ITS) issue.
I'd describe this one as a good old CPU bug where the behavior is
_obviously_ wrong, but since it just results in bad predictions it
wasn't wrong enough to notice. Well, the researchers noticed and also
realized that thus bug undermined a bunch of existing indirect branch
mitigations.
Thus the unusually wide impact on this one. Details:
ITS is a bug in some Intel CPUs that affects indirect branches
including RETs in the first half of a cacheline. Due to ITS such
branches may get wrongly predicted to a target of (direct or indirect)
branch that is located in the second half of a cacheline. Researchers
at VUSec found this behavior and reported to Intel.
Affected processors:
- Cascade Lake, Cooper Lake, Whiskey Lake V, Coffee Lake R, Comet
Lake, Ice Lake, Tiger Lake and Rocket Lake.
Scope of impact:
- Guest/host isolation:
When eIBRS is used for guest/host isolation, the indirect branches
in the VMM may still be predicted with targets corresponding to
direct branches in the guest.
- Intra-mode using cBPF:
cBPF can be used to poison the branch history to exploit ITS.
Realigning the indirect branches and RETs mitigates this attack
vector.
- User/kernel:
With eIBRS enabled user/kernel isolation is *not* impacted by ITS.
- Indirect Branch Prediction Barrier (IBPB):
Due to this bug indirect branches may be predicted with targets
corresponding to direct branches which were executed prior to IBPB.
This will be fixed in the microcode.
Mitigation:
As indirect branches in the first half of cacheline are affected, the
mitigation is to replace those indirect branches with a call to thunk that
is aligned to the second half of the cacheline.
RETs that take prediction from RSB are not affected, but they may be
affected by RSB-underflow condition. So, RETs in the first half of
cacheline are also patched to a return thunk that executes the RET aligned
to second half of cacheline"
* tag 'its-for-linus-20250509' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
selftest/x86/bugs: Add selftests for ITS
x86/its: FineIBT-paranoid vs ITS
x86/its: Use dynamic thunks for indirect branches
x86/ibt: Keep IBT disabled during alternative patching
mm/execmem: Unify early execmem_cache behaviour
x86/its: Align RETs in BHB clear sequence to avoid thunking
x86/its: Add support for RSB stuffing mitigation
x86/its: Add "vmexit" option to skip mitigation on some CPUs
x86/its: Enable Indirect Target Selection mitigation
x86/its: Add support for ITS-safe return thunk
x86/its: Add support for ITS-safe indirect thunk
x86/its: Enumerate Indirect Target Selection (ITS) bug
Documentation: x86/bugs/its: Add ITS documentation
|
|
Peter Zijlstra
|
872df34d7c |
x86/its: Use dynamic thunks for indirect branches
ITS mitigation moves the unsafe indirect branches to a safe thunk. This could degrade the prediction accuracy as the source address of indirect branches becomes same for different execution paths. To improve the predictions, and hence the performance, assign a separate thunk for each indirect callsite. This is also a defense-in-depth measure to avoid indirect branches aliasing with each other. As an example, 5000 dynamic thunks would utilize around 16 bits of the address space, thereby gaining entropy. For a BTB that uses 32 bits for indexing, dynamic thunks could provide better prediction accuracy over fixed thunks. Have ITS thunks be variable sized and use EXECMEM_MODULE_TEXT such that they are both more flexible (got to extend them later) and live in 2M TLBs, just like kernel code, avoiding undue TLB pressure. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com> |
|
Pawan Gupta
|
8754e67ad4 |
x86/its: Add support for ITS-safe indirect thunk
Due to ITS, indirect branches in the lower half of a cacheline may be vulnerable to branch target injection attack. Introduce ITS-safe thunks to patch indirect branches in the lower half of cacheline with the thunk. Also thunk any eBPF generated indirect branches in emit_indirect_jump(). Below category of indirect branches are not mitigated: - Indirect branches in the .init section are not mitigated because they are discarded after boot. - Indirect branches that are explicitly marked retpoline-safe. Note that retpoline also mitigates the indirect branches against ITS. This is because the retpoline sequence fills an RSB entry before RET, and it does not suffer from RSB-underflow part of the ITS. Signed-off-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Josh Poimboeuf <jpoimboe@kernel.org> Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com> |
|
Paweł Anikiel
|
5595c31c37 |
x86/Kconfig: make CFI_AUTO_DEFAULT depend on !RUST or Rust >= 1.88
Calling core::fmt::write() from rust code while FineIBT is enabled results in a kernel panic: [ 4614.199779] kernel BUG at arch/x86/kernel/cet.c:132! [ 4614.205343] Oops: invalid opcode: 0000 [#1] PREEMPT SMP NOPTI [ 4614.211781] CPU: 2 UID: 0 PID: 6057 Comm: dmabuf_dump Tainted: G U O 6.12.17-android16-0-g6ab38c534a43 #1 9da040f27673ec3945e23b998a0f8bd64c846599 [ 4614.227832] Tainted: [U]=USER, [O]=OOT_MODULE [ 4614.241247] RIP: 0010:do_kernel_cp_fault+0xea/0xf0 ... [ 4614.398144] RIP: 0010:_RNvXs5_NtNtNtCs3o2tGsuHyou_4core3fmt3num3impyNtB9_7Display3fmt+0x0/0x20 [ 4614.407792] Code: 48 f7 df 48 0f 48 f9 48 89 f2 89 c6 5d e9 18 fd ff ff 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 41 81 ea 14 61 af 2c 74 03 0f 0b 90 <66> 0f 1f 00 55 48 89 e5 48 89 f2 48 8b 3f be 01 00 00 00 5d e9 e7 [ 4614.428775] RSP: 0018:ffffb95acfa4ba68 EFLAGS: 00010246 [ 4614.434609] RAX: 0000000000000000 RBX: 0000000000000010 RCX: 0000000000000000 [ 4614.442587] RDX: 0000000000000007 RSI: ffffb95acfa4ba70 RDI: ffffb95acfa4bc88 [ 4614.450557] RBP: ffffb95acfa4bae0 R08: ffff0a00ffffff05 R09: 0000000000000070 [ 4614.458527] R10: 0000000000000000 R11: ffffffffab67eaf0 R12: ffffb95acfa4bcc8 [ 4614.466493] R13: ffffffffac5d50f0 R14: 0000000000000000 R15: 0000000000000000 [ 4614.474473] ? __cfi__RNvXs5_NtNtNtCs3o2tGsuHyou_4core3fmt3num3impyNtB9_7Display3fmt+0x10/0x10 [ 4614.484118] ? _RNvNtCs3o2tGsuHyou_4core3fmt5write+0x1d2/0x250 This happens because core::fmt::write() calls core::fmt::rt::Argument::fmt(), which currently has CFI disabled: library/core/src/fmt/rt.rs: 171 // FIXME: Transmuting formatter in new and indirectly branching to/calling 172 // it here is an explicit CFI violation. 173 #[allow(inline_no_sanitize)] 174 #[no_sanitize(cfi, kcfi)] 175 #[inline] 176 pub(super) unsafe fn fmt(&self, f: &mut Formatter<'_>) -> Result { This causes a Control Protection exception, because FineIBT has sealed off the original function's endbr64. This makes rust currently incompatible with FineIBT. Add a Kconfig dependency that prevents FineIBT from getting turned on by default if rust is enabled. [ Rust 1.88.0 (scheduled for 2025-06-26) should have this fixed [1], and thus we relaxed the condition with Rust >= 1.88. When `objtool` lands checking for this with e.g. [2], the plan is to ideally run that in upstream Rust's CI to prevent regressions early [3], since we do not control `core`'s source code. Alice tested the Rust PR backported to an older compiler. Peter would like that Rust provides a stable `core` which can be pulled into the kernel: "Relying on that much out of tree code is 'unfortunate'". - Miguel ] Signed-off-by: Paweł Anikiel <panikiel@google.com> Reviewed-by: Alice Ryhl <aliceryhl@google.com> Acked-by: Peter Zijlstra <peterz@infradead.org> Link: https://github.com/rust-lang/rust/pull/139632 [1] Link: https://lore.kernel.org/rust-for-linux/20250410154556.GB9003@noisy.programming.kicks-ass.net/ [2] Link: https://github.com/rust-lang/rust/pull/139632#issuecomment-2801950873 [3] Link: https://lore.kernel.org/r/20250410115420.366349-1-panikiel@google.com Link: https://lore.kernel.org/r/att0-CANiq72kjDM0cKALVy4POEzhfdT4nO7tqz0Pm7xM+3=_0+L1t=A@mail.gmail.com [ Reduced splat. - Miguel ] Signed-off-by: Miguel Ojeda <ojeda@kernel.org> |
|
Eric Biggers
|
e59236b5a0 |
x86/sgx: Use SHA-256 library API instead of crypto_shash API
This user of SHA-256 does not support any other algorithm, so the crypto_shash abstraction provides no value. Just use the SHA-256 library API instead, which is much simpler and easier to use. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Link: https://lore.kernel.org/all/20250428183838.799333-1-ebiggers%40kernel.org |
|
Andy Lutomirski
|
af8967158f |
x86/mm: Opt-in to IRQs-off activate_mm()
We gain nothing by having the core code enable IRQs right before calling activate_mm() only for us to turn them right back off again in switch_mm(). This will save a few cycles, so execve() should be blazingly fast with this patch applied! Signed-off-by: Andy Lutomirski <luto@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Cc: Rik van Riel <riel@surriel.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Link: https://lore.kernel.org/r/20250402094540.3586683-8-mingo@kernel.org |
|
|
Linus Torvalds
|
f4d2ef4825 |
Kbuild updates for v6.15
- Improve performance in gendwarfksyms
- Remove deprecated EXTRA_*FLAGS and KBUILD_ENABLE_EXTRA_GCC_CHECKS
- Support CONFIG_HEADERS_INSTALL for ARCH=um
- Use more relative paths to sources files for better reproducibility
- Support the loong64 Debian architecture
- Add Kbuild bash completion
- Introduce intermediate vmlinux.unstripped for architectures that need
static relocations to be stripped from the final vmlinux
- Fix versioning in Debian packages for -rc releases
- Treat missing MODULE_DESCRIPTION() as an error
- Convert Nios2 Makefiles to use the generic rule for built-in DTB
- Add debuginfo support to the RPM package
-----BEGIN PGP SIGNATURE-----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=GiQ6
-----END PGP SIGNATURE-----
Merge tag 'kbuild-v6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild updates from Masahiro Yamada:
- Improve performance in gendwarfksyms
- Remove deprecated EXTRA_*FLAGS and KBUILD_ENABLE_EXTRA_GCC_CHECKS
- Support CONFIG_HEADERS_INSTALL for ARCH=um
- Use more relative paths to sources files for better reproducibility
- Support the loong64 Debian architecture
- Add Kbuild bash completion
- Introduce intermediate vmlinux.unstripped for architectures that need
static relocations to be stripped from the final vmlinux
- Fix versioning in Debian packages for -rc releases
- Treat missing MODULE_DESCRIPTION() as an error
- Convert Nios2 Makefiles to use the generic rule for built-in DTB
- Add debuginfo support to the RPM package
* tag 'kbuild-v6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (40 commits)
kbuild: rpm-pkg: build a debuginfo RPM
kconfig: merge_config: use an empty file as initfile
nios2: migrate to the generic rule for built-in DTB
rust: kbuild: skip `--remap-path-prefix` for `rustdoc`
kbuild: pacman-pkg: hardcode module installation path
kbuild: deb-pkg: don't set KBUILD_BUILD_VERSION unconditionally
modpost: require a MODULE_DESCRIPTION()
kbuild: make all file references relative to source root
x86: drop unnecessary prefix map configuration
kbuild: deb-pkg: add comment about future removal of KDEB_COMPRESS
kbuild: Add a help message for "headers"
kbuild: deb-pkg: remove "version" variable in mkdebian
kbuild: deb-pkg: fix versioning for -rc releases
Documentation/kbuild: Fix indentation in modules.rst example
x86: Get rid of Makefile.postlink
kbuild: Create intermediate vmlinux build with relocations preserved
kbuild: Introduce Kconfig symbol for linking vmlinux with relocations
kbuild: link-vmlinux.sh: Make output file name configurable
kbuild: do not generate .tmp_vmlinux*.map when CONFIG_VMLINUX_MAP=y
Revert "kheaders: Ignore silly-rename files"
...
|
|
|
Linus Torvalds
|
8c7c1b5506 |
- The 2 patch series "mm: fixes for fallouts from mem_init() cleanup"
from Mike Rapoport fixes a couple of issues with the just-merged "arch, mm: reduce code duplication in mem_init()" series. - The 4 patch series "MAINTAINERS: add my isub-entries to MM part." from Mike Rapoport does some maintenance on MAINTAINERS. - The 6 patch series "remove tlb_remove_page_ptdesc()" from Qi Zheng does some cleanup work to the page mapping code. - The 7 patch series "mseal system mappings" from Jeff Xu permits sealing of "system mappings", such as vdso, vvar, vvar_vclock, vectors (arm compat-mode), sigpage (arm compat-mode). - Plus the usual shower of singleton patches. -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQTTMBEPP41GrTpTJgfdBJ7gKXxAjgUCZ+4XpgAKCRDdBJ7gKXxA jnwtAP43Rp3zyWf034fEypea36xQqcsy4I7YUTdZEgnFS7LCZwEApM97JvGHsYEr Ns9Zhnh+E3RWASfOAzJoVZVrAaMovg4= =MyVR -----END PGP SIGNATURE----- Merge tag 'mm-stable-2025-04-02-22-07' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull more MM updates from Andrew Morton: - The series "mm: fixes for fallouts from mem_init() cleanup" from Mike Rapoport fixes a couple of issues with the just-merged "arch, mm: reduce code duplication in mem_init()" series - The series "MAINTAINERS: add my isub-entries to MM part." from Mike Rapoport does some maintenance on MAINTAINERS - The series "remove tlb_remove_page_ptdesc()" from Qi Zheng does some cleanup work to the page mapping code - The series "mseal system mappings" from Jeff Xu permits sealing of "system mappings", such as vdso, vvar, vvar_vclock, vectors (arm compat-mode), sigpage (arm compat-mode) - Plus the usual shower of singleton patches * tag 'mm-stable-2025-04-02-22-07' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (31 commits) mseal sysmap: add arch-support txt mseal sysmap: enable s390 selftest: test system mappings are sealed mseal sysmap: update mseal.rst mseal sysmap: uprobe mapping mseal sysmap: enable arm64 mseal sysmap: enable x86-64 mseal sysmap: generic vdso vvar mapping selftests: x86: test_mremap_vdso: skip if vdso is msealed mseal sysmap: kernel config and header change mm: pgtable: remove tlb_remove_page_ptdesc() x86: pgtable: convert to use tlb_remove_ptdesc() riscv: pgtable: unconditionally use tlb_remove_ptdesc() mm: pgtable: convert some architectures to use tlb_remove_ptdesc() mm: pgtable: change pt parameter of tlb_remove_ptdesc() to struct ptdesc* mm: pgtable: make generic tlb_remove_table() use struct ptdesc microblaze/mm: put mm_cmdline_setup() in .init.text section mm/memory_hotplug: fix call folio_test_large with tail page in do_migrate_range MAINTAINERS: mm: add entry for secretmem MAINTAINERS: mm: add entry for numa memblocks and numa emulation ... |
|
|
Linus Torvalds
|
6cb094583a |
* Avoid direct HLT instruction execution in TDX guests
-----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEV76QKkVc4xCGURexaDWVMHDJkrAFAmfsa8QACgkQaDWVMHDJ krBCAhAAodPYiIEy+qpad1Q8HPhaKYUJ5jzkIdt1GYXCBf2dfY6Zj8w7edSApUhA 7og9gK8ku8hwpf6oCGmp2Lm74FgATIj7q0ac07XBW3OsrfFQc73DfPJn6WMDYjRV ec9baSzX5GcqUyezq7woyJayZT9LRLBexF/vk7dAQ7nuecCOUhqLXWBN5eUT0e+K 58kFjZoZZx/4Y9zh7UIxBQyCbL88IeI6rclW5tZJlRHNuD7B64x606ETwQJKK9GK YHPhqRKtjJRzSOn/xGYT4AQDPbF9u14Q4WGVO+bvgv8Z6BtmiYV2fG0q5GU14h0z +gwjja3Edo+F6zSIIZonQbrSVHspwm1IPJQQZHljhFOEt7Ezu3hLIYouUWVlNRgl mRzubZBmhQUfJOAtfGmHktdg6j+QinYDQr+/CjoXoeh8EknL+KtqamXJnyb8KAMN qH6X+N2coaCcl334zW44m6YTmTipdIhmHFj6edYwqdR3Ux6DDaX9PKopIIpiZEcb GH1o++4JMp9OBIaTu0Yp1WgWJ+EyUSWDJbydqCMOdthuESqKW45IQkLhPxZpIhB4 5Wra4Ot7AdsThyPqNPaEu3ND+BXu4tAAa8r8GK+AP7DqRxXz/bbWTHqNepm9wSvP pnOlLyVTri/difMWWsJJPK6QRYbNnemrny3Do3PbIZVKS08vgLs= =XvoD -----END PGP SIGNATURE----- Merge tag 'x86_tdx_for_6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 TDX updates from Dave Hansen: "Avoid direct HLT instruction execution in TDX guests. TDX guests aren't expected to use the HLT instruction directly. It causes a virtualization exception (#VE). While the #VE _can_ be handled, the current handling is slow and buggy and the easiest thing is just to avoid HLT in the first place. Plus, the kernel already has paravirt infrastructure that makes it relatively painless. Make TDX guests require paravirt and add some TDX-specific paravirt handlers which avoid HLT in the normal halt routines. Also add a warning in case another HLT sneaks in. There was a report that this leads to a "major performance improvement" on specjbb2015, probably because of the extra #VE overhead or missed wakeups from the buggy HLT handling" * tag 'x86_tdx_for_6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/tdx: Emit warning if IRQs are enabled during HLT #VE handling x86/tdx: Fix arch_safe_halt() execution for TDX VMs x86/paravirt: Move halt paravirt calls under CONFIG_PARAVIRT |
|
Jeff Xu
|
3049def198 |
mseal sysmap: enable x86-64
Provide support for CONFIG_MSEAL_SYSTEM_MAPPINGS on x86-64, covering the vdso, vvar, vvar_vclock. Production release testing passes on Android and Chrome OS. Link: https://lkml.kernel.org/r/20250305021711.3867874-4-jeffxu@google.com Signed-off-by: Jeff Xu <jeffxu@chromium.org> Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com> Reviewed-by: Kees Cook <kees@kernel.org> Cc: Adhemerval Zanella <adhemerval.zanella@linaro.org> Cc: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@canonical.com> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Andrei Vagin <avagin@gmail.com> Cc: Anna-Maria Behnsen <anna-maria@linutronix.de> Cc: Ard Biesheuvel <ardb@kernel.org> Cc: Benjamin Berg <benjamin@sipsolutions.net> Cc: Christoph Hellwig <hch@lst.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: David Rientjes <rientjes@google.com> Cc: David S. Miller <davem@davemloft.net> Cc: Elliot Hughes <enh@google.com> Cc: Florian Faineli <f.fainelli@gmail.com> Cc: Greg Ungerer <gerg@kernel.org> Cc: Guenter Roeck <groeck@chromium.org> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Helge Deller <deller@gmx.de> Cc: Hyeonggon Yoo <42.hyeyoo@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jann Horn <jannh@google.com> Cc: Jason A. Donenfeld <jason@zx2c4.com> Cc: Johannes Berg <johannes@sipsolutions.net> Cc: Jorge Lucangeli Obes <jorgelo@chromium.org> Cc: Linus Waleij <linus.walleij@linaro.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Matthew Wilcow (Oracle) <willy@infradead.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michal Hocko <mhocko@suse.com> Cc: Miguel Ojeda <ojeda@kernel.org> Cc: Mike Rapoport <mike.rapoport@gmail.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Pedro Falcato <pedro.falcato@gmail.com> Cc: Peter Xu <peterx@redhat.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Stephen Röttger <sroettger@google.com> Cc: Thomas Weißschuh <thomas.weissschuh@linutronix.de> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
|
|
Linus Torvalds
|
eb0ece1602 |
- The 6 patch series "Enable strict percpu address space checks" from
Uros Bizjak uses x86 named address space qualifiers to provide compile-time checking of percpu area accesses. This has caused a small amount of fallout - two or three issues were reported. In all cases the calling code was founf to be incorrect. - The 4 patch series "Some cleanup for memcg" from Chen Ridong implements some relatively monir cleanups for the memcontrol code. - The 17 patch series "mm: fixes for device-exclusive entries (hmm)" from David Hildenbrand fixes a boatload of issues which David found then using device-exclusive PTE entries when THP is enabled. More work is needed, but this makes thins better - our own HMM selftests now succeed. - The 2 patch series "mm: zswap: remove z3fold and zbud" from Yosry Ahmed remove the z3fold and zbud implementations. They have been deprecated for half a year and nobody has complained. - The 5 patch series "mm: further simplify VMA merge operation" from Lorenzo Stoakes implements numerous simplifications in this area. No runtime effects are anticipated. - The 4 patch series "mm/madvise: remove redundant mmap_lock operations from process_madvise()" from SeongJae Park rationalizes the locking in the madvise() implementation. Performance gains of 20-25% were observed in one MADV_DONTNEED microbenchmark. - The 12 patch series "Tiny cleanup and improvements about SWAP code" from Baoquan He contains a number of touchups to issues which Baoquan noticed when working on the swap code. - The 2 patch series "mm: kmemleak: Usability improvements" from Catalin Marinas implements a couple of improvements to the kmemleak user-visible output. - The 2 patch series "mm/damon/paddr: fix large folios access and schemes handling" from Usama Arif provides a couple of fixes for DAMON's handling of large folios. - The 3 patch series "mm/damon/core: fix wrong and/or useless damos_walk() behaviors" from SeongJae Park fixes a few issues with the accuracy of kdamond's walking of DAMON regions. - The 3 patch series "expose mapping wrprotect, fix fb_defio use" from Lorenzo Stoakes changes the interaction between framebuffer deferred-io and core MM. No functional changes are anticipated - this is preparatory work for the future removal of page structure fields. - The 4 patch series "mm/damon: add support for hugepage_size DAMOS filter" from Usama Arif adds a DAMOS filter which permits the filtering by huge page sizes. - The 4 patch series "mm: permit guard regions for file-backed/shmem mappings" from Lorenzo Stoakes extends the guard region feature from its present "anon mappings only" state. The feature now covers shmem and file-backed mappings. - The 4 patch series "mm: batched unmap lazyfree large folios during reclamation" from Barry Song cleans up and speeds up the unmapping for pte-mapped large folios. - The 18 patch series "reimplement per-vma lock as a refcount" from Suren Baghdasaryan puts the vm_lock back into the vma. Our reasons for pulling it out were largely bogus and that change made the code more messy. This patchset provides small (0-10%) improvements on one microbenchmark. - The 5 patch series "Docs/mm/damon: misc DAMOS filters documentation fixes and improves" from SeongJae Park does some maintenance work on the DAMON docs. - The 27 patch series "hugetlb/CMA improvements for large systems" from Frank van der Linden addresses a pile of issues which have been observed when using CMA on large machines. - The 2 patch series "mm/damon: introduce DAMOS filter type for unmapped pages" from SeongJae Park enables users of DMAON/DAMOS to filter my the page's mapped/unmapped status. - The 19 patch series "zsmalloc/zram: there be preemption" from Sergey Senozhatsky teaches zram to run its compression and decompression operations preemptibly. - The 12 patch series "selftests/mm: Some cleanups from trying to run them" from Brendan Jackman fixes a pile of unrelated issues which Brendan encountered while runnimg our selftests. - The 2 patch series "fs/proc/task_mmu: add guard region bit to pagemap" from Lorenzo Stoakes permits userspace to use /proc/pid/pagemap to determine whether a particular page is a guard page. - The 7 patch series "mm, swap: remove swap slot cache" from Kairui Song removes the swap slot cache from the allocation path - it simply wasn't being effective. - The 5 patch series "mm: cleanups for device-exclusive entries (hmm)" from David Hildenbrand implements a number of unrelated cleanups in this code. - The 5 patch series "mm: Rework generic PTDUMP configs" from Anshuman Khandual implements a number of preparatoty cleanups to the GENERIC_PTDUMP Kconfig logic. - The 8 patch series "mm/damon: auto-tune aggregation interval" from SeongJae Park implements a feedback-driven automatic tuning feature for DAMON's aggregation interval tuning. - The 5 patch series "Fix lazy mmu mode" from Ryan Roberts fixes some issues in powerpc, sparc and x86 lazy MMU implementations. Ryan did this in preparation for implementing lazy mmu mode for arm64 to optimize vmalloc. - The 2 patch series "mm/page_alloc: Some clarifications for migratetype fallback" from Brendan Jackman reworks some commentary to make the code easier to follow. - The 3 patch series "page_counter cleanup and size reduction" from Shakeel Butt cleans up the page_counter code and fixes a size increase which we accidentally added late last year. - The 3 patch series "Add a command line option that enables control of how many threads should be used to allocate huge pages" from Thomas Prescher does that. It allows the careful operator to significantly reduce boot time by tuning the parallalization of huge page initialization. - The 3 patch series "Fix calculations in trace_balance_dirty_pages() for cgwb" from Tang Yizhou fixes the tracing output from the dirty page balancing code. - The 9 patch series "mm/damon: make allow filters after reject filters useful and intuitive" from SeongJae Park improves the handling of allow and reject filters. Behaviour is made more consistent and the documention is updated accordingly. - The 5 patch series "Switch zswap to object read/write APIs" from Yosry Ahmed updates zswap to the new object read/write APIs and thus permits the removal of some legacy code from zpool and zsmalloc. - The 6 patch series "Some trivial cleanups for shmem" from Baolin Wang does as it claims. - The 20 patch series "fs/dax: Fix ZONE_DEVICE page reference counts" from Alistair Popple regularizes the weird ZONE_DEVICE page refcount handling in DAX, permittig the removal of a number of special-case checks. - The 4 patch series "refactor mremap and fix bug" from Lorenzo Stoakes is a preparatoty refactoring and cleanup of the mremap() code. - The 20 patch series "mm: MM owner tracking for large folios (!hugetlb) + CONFIG_NO_PAGE_MAPCOUNT" from David Hildenbrand reworks the manner in which we determine whether a large folio is known to be mapped exclusively into a single MM. - The 8 patch series "mm/damon: add sysfs dirs for managing DAMOS filters based on handling layers" from SeongJae Park adds a couple of new sysfs directories to ease the management of DAMON/DAMOS filters. - The 13 patch series "arch, mm: reduce code duplication in mem_init()" from Mike Rapoport consolidates many per-arch implementations of mem_init() into code generic code, where that is practical. - The 13 patch series "mm/damon/sysfs: commit parameters online via damon_call()" from SeongJae Park continues the cleaning up of sysfs access to DAMON internal data. - The 3 patch series "mm: page_ext: Introduce new iteration API" from Luiz Capitulino reworks the page_ext initialization to fix a boot-time crash which was observed with an unusual combination of compile and cmdline options. - The 8 patch series "Buddy allocator like (or non-uniform) folio split" from Zi Yan reworks the code to split a folio into smaller folios. The main benefit is lessened memory consumption: fewer post-split folios are generated. - The 2 patch series "Minimize xa_node allocation during xarry split" from Zi Yan reduces the number of xarray xa_nodes which are generated during an xarray split. - The 2 patch series "drivers/base/memory: Two cleanups" from Gavin Shan performs some maintenance work on the drivers/base/memory code. - The 3 patch series "Add tracepoints for lowmem reserves, watermarks and totalreserve_pages" from Martin Liu adds some more tracepoints to the page allocator code. - The 4 patch series "mm/madvise: cleanup requests validations and classifications" from SeongJae Park cleans up some warts which SeongJae observed during his earlier madvise work. - The 3 patch series "mm/hwpoison: Fix regressions in memory failure handling" from Shuai Xue addresses two quite serious regressions which Shuai has observed in the memory-failure implementation. - The 5 patch series "mm: reliable huge page allocator" from Johannes Weiner makes huge page allocations cheaper and more reliable by reducing fragmentation. - The 5 patch series "Minor memcg cleanups & prep for memdescs" from Matthew Wilcox is preparatory work for the future implementation of memdescs. - The 4 patch series "track memory used by balloon drivers" from Nico Pache introduces a way to track memory used by our various balloon drivers. - The 2 patch series "mm/damon: introduce DAMOS filter type for active pages" from Nhat Pham permits users to filter for active/inactive pages, separately for file and anon pages. - The 2 patch series "Adding Proactive Memory Reclaim Statistics" from Hao Jia separates the proactive reclaim statistics from the direct reclaim statistics. - The 2 patch series "mm/vmscan: don't try to reclaim hwpoison folio" from Jinjiang Tu fixes our handling of hwpoisoned pages within the reclaim code. -----BEGIN PGP SIGNATURE----- iHQEABYKAB0WIQTTMBEPP41GrTpTJgfdBJ7gKXxAjgUCZ+nZaAAKCRDdBJ7gKXxA jsOWAPiP4r7CJHMZRK4eyJOkvS1a1r+TsIarrFZtjwvf/GIfAQCEG+JDxVfUaUSF Ee93qSSLR1BkNdDw+931Pu0mXfbnBw== =Pn2K -----END PGP SIGNATURE----- Merge tag 'mm-stable-2025-03-30-16-52' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull MM updates from Andrew Morton: - The series "Enable strict percpu address space checks" from Uros Bizjak uses x86 named address space qualifiers to provide compile-time checking of percpu area accesses. This has caused a small amount of fallout - two or three issues were reported. In all cases the calling code was found to be incorrect. - The series "Some cleanup for memcg" from Chen Ridong implements some relatively monir cleanups for the memcontrol code. - The series "mm: fixes for device-exclusive entries (hmm)" from David Hildenbrand fixes a boatload of issues which David found then using device-exclusive PTE entries when THP is enabled. More work is needed, but this makes thins better - our own HMM selftests now succeed. - The series "mm: zswap: remove z3fold and zbud" from Yosry Ahmed remove the z3fold and zbud implementations. They have been deprecated for half a year and nobody has complained. - The series "mm: further simplify VMA merge operation" from Lorenzo Stoakes implements numerous simplifications in this area. No runtime effects are anticipated. - The series "mm/madvise: remove redundant mmap_lock operations from process_madvise()" from SeongJae Park rationalizes the locking in the madvise() implementation. Performance gains of 20-25% were observed in one MADV_DONTNEED microbenchmark. - The series "Tiny cleanup and improvements about SWAP code" from Baoquan He contains a number of touchups to issues which Baoquan noticed when working on the swap code. - The series "mm: kmemleak: Usability improvements" from Catalin Marinas implements a couple of improvements to the kmemleak user-visible output. - The series "mm/damon/paddr: fix large folios access and schemes handling" from Usama Arif provides a couple of fixes for DAMON's handling of large folios. - The series "mm/damon/core: fix wrong and/or useless damos_walk() behaviors" from SeongJae Park fixes a few issues with the accuracy of kdamond's walking of DAMON regions. - The series "expose mapping wrprotect, fix fb_defio use" from Lorenzo Stoakes changes the interaction between framebuffer deferred-io and core MM. No functional changes are anticipated - this is preparatory work for the future removal of page structure fields. - The series "mm/damon: add support for hugepage_size DAMOS filter" from Usama Arif adds a DAMOS filter which permits the filtering by huge page sizes. - The series "mm: permit guard regions for file-backed/shmem mappings" from Lorenzo Stoakes extends the guard region feature from its present "anon mappings only" state. The feature now covers shmem and file-backed mappings. - The series "mm: batched unmap lazyfree large folios during reclamation" from Barry Song cleans up and speeds up the unmapping for pte-mapped large folios. - The series "reimplement per-vma lock as a refcount" from Suren Baghdasaryan puts the vm_lock back into the vma. Our reasons for pulling it out were largely bogus and that change made the code more messy. This patchset provides small (0-10%) improvements on one microbenchmark. - The series "Docs/mm/damon: misc DAMOS filters documentation fixes and improves" from SeongJae Park does some maintenance work on the DAMON docs. - The series "hugetlb/CMA improvements for large systems" from Frank van der Linden addresses a pile of issues which have been observed when using CMA on large machines. - The series "mm/damon: introduce DAMOS filter type for unmapped pages" from SeongJae Park enables users of DMAON/DAMOS to filter my the page's mapped/unmapped status. - The series "zsmalloc/zram: there be preemption" from Sergey Senozhatsky teaches zram to run its compression and decompression operations preemptibly. - The series "selftests/mm: Some cleanups from trying to run them" from Brendan Jackman fixes a pile of unrelated issues which Brendan encountered while runnimg our selftests. - The series "fs/proc/task_mmu: add guard region bit to pagemap" from Lorenzo Stoakes permits userspace to use /proc/pid/pagemap to determine whether a particular page is a guard page. - The series "mm, swap: remove swap slot cache" from Kairui Song removes the swap slot cache from the allocation path - it simply wasn't being effective. - The series "mm: cleanups for device-exclusive entries (hmm)" from David Hildenbrand implements a number of unrelated cleanups in this code. - The series "mm: Rework generic PTDUMP configs" from Anshuman Khandual implements a number of preparatoty cleanups to the GENERIC_PTDUMP Kconfig logic. - The series "mm/damon: auto-tune aggregation interval" from SeongJae Park implements a feedback-driven automatic tuning feature for DAMON's aggregation interval tuning. - The series "Fix lazy mmu mode" from Ryan Roberts fixes some issues in powerpc, sparc and x86 lazy MMU implementations. Ryan did this in preparation for implementing lazy mmu mode for arm64 to optimize vmalloc. - The series "mm/page_alloc: Some clarifications for migratetype fallback" from Brendan Jackman reworks some commentary to make the code easier to follow. - The series "page_counter cleanup and size reduction" from Shakeel Butt cleans up the page_counter code and fixes a size increase which we accidentally added late last year. - The series "Add a command line option that enables control of how many threads should be used to allocate huge pages" from Thomas Prescher does that. It allows the careful operator to significantly reduce boot time by tuning the parallalization of huge page initialization. - The series "Fix calculations in trace_balance_dirty_pages() for cgwb" from Tang Yizhou fixes the tracing output from the dirty page balancing code. - The series "mm/damon: make allow filters after reject filters useful and intuitive" from SeongJae Park improves the handling of allow and reject filters. Behaviour is made more consistent and the documention is updated accordingly. - The series "Switch zswap to object read/write APIs" from Yosry Ahmed updates zswap to the new object read/write APIs and thus permits the removal of some legacy code from zpool and zsmalloc. - The series "Some trivial cleanups for shmem" from Baolin Wang does as it claims. - The series "fs/dax: Fix ZONE_DEVICE page reference counts" from Alistair Popple regularizes the weird ZONE_DEVICE page refcount handling in DAX, permittig the removal of a number of special-case checks. - The series "refactor mremap and fix bug" from Lorenzo Stoakes is a preparatoty refactoring and cleanup of the mremap() code. - The series "mm: MM owner tracking for large folios (!hugetlb) + CONFIG_NO_PAGE_MAPCOUNT" from David Hildenbrand reworks the manner in which we determine whether a large folio is known to be mapped exclusively into a single MM. - The series "mm/damon: add sysfs dirs for managing DAMOS filters based on handling layers" from SeongJae Park adds a couple of new sysfs directories to ease the management of DAMON/DAMOS filters. - The series "arch, mm: reduce code duplication in mem_init()" from Mike Rapoport consolidates many per-arch implementations of mem_init() into code generic code, where that is practical. - The series "mm/damon/sysfs: commit parameters online via damon_call()" from SeongJae Park continues the cleaning up of sysfs access to DAMON internal data. - The series "mm: page_ext: Introduce new iteration API" from Luiz Capitulino reworks the page_ext initialization to fix a boot-time crash which was observed with an unusual combination of compile and cmdline options. - The series "Buddy allocator like (or non-uniform) folio split" from Zi Yan reworks the code to split a folio into smaller folios. The main benefit is lessened memory consumption: fewer post-split folios are generated. - The series "Minimize xa_node allocation during xarry split" from Zi Yan reduces the number of xarray xa_nodes which are generated during an xarray split. - The series "drivers/base/memory: Two cleanups" from Gavin Shan performs some maintenance work on the drivers/base/memory code. - The series "Add tracepoints for lowmem reserves, watermarks and totalreserve_pages" from Martin Liu adds some more tracepoints to the page allocator code. - The series "mm/madvise: cleanup requests validations and classifications" from SeongJae Park cleans up some warts which SeongJae observed during his earlier madvise work. - The series "mm/hwpoison: Fix regressions in memory failure handling" from Shuai Xue addresses two quite serious regressions which Shuai has observed in the memory-failure implementation. - The series "mm: reliable huge page allocator" from Johannes Weiner makes huge page allocations cheaper and more reliable by reducing fragmentation. - The series "Minor memcg cleanups & prep for memdescs" from Matthew Wilcox is preparatory work for the future implementation of memdescs. - The series "track memory used by balloon drivers" from Nico Pache introduces a way to track memory used by our various balloon drivers. - The series "mm/damon: introduce DAMOS filter type for active pages" from Nhat Pham permits users to filter for active/inactive pages, separately for file and anon pages. - The series "Adding Proactive Memory Reclaim Statistics" from Hao Jia separates the proactive reclaim statistics from the direct reclaim statistics. - The series "mm/vmscan: don't try to reclaim hwpoison folio" from Jinjiang Tu fixes our handling of hwpoisoned pages within the reclaim code. * tag 'mm-stable-2025-03-30-16-52' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (431 commits) mm/page_alloc: remove unnecessary __maybe_unused in order_to_pindex() x86/mm: restore early initialization of high_memory for 32-bits mm/vmscan: don't try to reclaim hwpoison folio mm/hwpoison: introduce folio_contain_hwpoisoned_page() helper cgroup: docs: add pswpin and pswpout items in cgroup v2 doc mm: vmscan: split proactive reclaim statistics from direct reclaim statistics selftests/mm: speed up split_huge_page_test selftests/mm: uffd-unit-tests support for hugepages > 2M docs/mm/damon/design: document active DAMOS filter type mm/damon: implement a new DAMOS filter type for active pages fs/dax: don't disassociate zero page entries MM documentation: add "Unaccepted" meminfo entry selftests/mm: add commentary about 9pfs bugs fork: use __vmalloc_node() for stack allocation docs/mm: Physical Memory: Populate the "Zones" section xen: balloon: update the NR_BALLOON_PAGES state hv_balloon: update the NR_BALLOON_PAGES state balloon_compaction: update the NR_BALLOON_PAGES state meminfo: add a per node counter for balloon drivers mm: remove references to folio in __memcg_kmem_uncharge_page() ... |
|
|
Linus Torvalds
|
7405c0f01a |
Miscellaneous x86 fixes and updates:
- Fix a large number of x86 Kconfig dependency and help text accuracy
bugs/problems, by Mateusz Jończyk and David Heideberg.
- Fix a VM_PAT interaction with fork() crash. This also touches
core kernel code.
- Fix an ORC unwinder bug for interrupt entries
- Fixes and cleanups.
- Fix an AMD microcode loader bug that can promote verification failures
into success.
- Add early-printk support for MMIO based UARTs on an x86 board that
had no other serial debugging facility and also experienced early
boot crashes.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
-----BEGIN PGP SIGNATURE-----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=/qKX
-----END PGP SIGNATURE-----
Merge tag 'x86-urgent-2025-03-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull misc x86 fixes and updates from Ingo Molnar:
- Fix a large number of x86 Kconfig dependency and help text accuracy
bugs/problems, by Mateusz Jończyk and David Heideberg
- Fix a VM_PAT interaction with fork() crash. This also touches core
kernel code
- Fix an ORC unwinder bug for interrupt entries
- Fixes and cleanups
- Fix an AMD microcode loader bug that can promote verification
failures into success
- Add early-printk support for MMIO based UARTs on an x86 board that
had no other serial debugging facility and also experienced early
boot crashes
* tag 'x86-urgent-2025-03-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/microcode/AMD: Fix __apply_microcode_amd()'s return value
x86/mm/pat: Fix VM_PAT handling when fork() fails in copy_page_range()
x86/fpu: Update the outdated comment above fpstate_init_user()
x86/early_printk: Add support for MMIO-based UARTs
x86/dumpstack: Fix inaccurate unwinding from exception stacks due to misplaced assignment
x86/entry: Fix ORC unwinder for PUSH_REGS with save_ret=1
x86/Kconfig: Fix lists in X86_EXTENDED_PLATFORM help text
x86/Kconfig: Correct X86_X2APIC help text
x86/speculation: Remove the extra #ifdef around CALL_NOSPEC
x86/Kconfig: Document release year of glibc 2.3.3
x86/Kconfig: Make CONFIG_PCI_CNB20LE_QUIRK depend on X86_32
x86/Kconfig: Document CONFIG_PCI_MMCONFIG
x86/Kconfig: Update lists in X86_EXTENDED_PLATFORM
x86/Kconfig: Move all X86_EXTENDED_PLATFORM options together
x86/Kconfig: Always enable ARCH_SPARSEMEM_ENABLE
x86/Kconfig: Enable X86_X2APIC by default and improve help text
|
|
Vishal Annapurve
|
9f98a4f4e7 |
x86/tdx: Fix arch_safe_halt() execution for TDX VMs
Direct HLT instruction execution causes #VEs for TDX VMs which is routed to hypervisor via TDCALL. If HLT is executed in STI-shadow, resulting #VE handler will enable interrupts before TDCALL is routed to hypervisor leading to missed wakeup events, as current TDX spec doesn't expose interruptibility state information to allow #VE handler to selectively enable interrupts. Commit |
|
|
Linus Torvalds
|
ee6740fd34 |
CRC updates for 6.15
Another set of improvements to the kernel's CRC (cyclic redundancy
check) code:
- Rework the CRC64 library functions to be directly optimized, like what
I did last cycle for the CRC32 and CRC-T10DIF library functions.
- Rewrite the x86 PCLMULQDQ-optimized CRC code, and add VPCLMULQDQ
support and acceleration for crc64_be and crc64_nvme.
- Rewrite the riscv Zbc-optimized CRC code, and add acceleration for
crc_t10dif, crc64_be, and crc64_nvme.
- Remove crc_t10dif and crc64_rocksoft from the crypto API, since they
are no longer needed there.
- Rename crc64_rocksoft to crc64_nvme, as the old name was incorrect.
- Add kunit test cases for crc64_nvme and crc7.
- Eliminate redundant functions for calculating the Castagnoli CRC32,
settling on just crc32c().
- Remove unnecessary prompts from some of the CRC kconfig options.
- Further optimize the x86 crc32c code.
-----BEGIN PGP SIGNATURE-----
iIoEABYIADIWIQSacvsUNc7UX4ntmEPzXCl4vpKOKwUCZ+CGGhQcZWJpZ2dlcnNA
Z29vZ2xlLmNvbQAKCRDzXCl4vpKOK3wRAP4tbnzawUmlIHIF0hleoADXehUgAhMt
NZn15mGvyiuwIQEA8W9qvnLdFXZkdxhxAEvDDFjyrRauL6eGtr/GvCx4AQY=
=wmKG
-----END PGP SIGNATURE-----
Merge tag 'crc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux
Pull CRC updates from Eric Biggers:
"Another set of improvements to the kernel's CRC (cyclic redundancy
check) code:
- Rework the CRC64 library functions to be directly optimized, like
what I did last cycle for the CRC32 and CRC-T10DIF library
functions
- Rewrite the x86 PCLMULQDQ-optimized CRC code, and add VPCLMULQDQ
support and acceleration for crc64_be and crc64_nvme
- Rewrite the riscv Zbc-optimized CRC code, and add acceleration for
crc_t10dif, crc64_be, and crc64_nvme
- Remove crc_t10dif and crc64_rocksoft from the crypto API, since
they are no longer needed there
- Rename crc64_rocksoft to crc64_nvme, as the old name was incorrect
- Add kunit test cases for crc64_nvme and crc7
- Eliminate redundant functions for calculating the Castagnoli CRC32,
settling on just crc32c()
- Remove unnecessary prompts from some of the CRC kconfig options
- Further optimize the x86 crc32c code"
* tag 'crc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux: (36 commits)
x86/crc: drop the avx10_256 functions and rename avx10_512 to avx512
lib/crc: remove unnecessary prompt for CONFIG_CRC64
lib/crc: remove unnecessary prompt for CONFIG_LIBCRC32C
lib/crc: remove unnecessary prompt for CONFIG_CRC8
lib/crc: remove unnecessary prompt for CONFIG_CRC7
lib/crc: remove unnecessary prompt for CONFIG_CRC4
lib/crc7: unexport crc7_be_syndrome_table
lib/crc_kunit.c: update comment in crc_benchmark()
lib/crc_kunit.c: add test and benchmark for crc7_be()
x86/crc32: optimize tail handling for crc32c short inputs
riscv/crc64: add Zbc optimized CRC64 functions
riscv/crc-t10dif: add Zbc optimized CRC-T10DIF function
riscv/crc32: reimplement the CRC32 functions using new template
riscv/crc: add "template" for Zbc optimized CRC functions
x86/crc: add ANNOTATE_NOENDBR to suppress objtool warnings
x86/crc32: improve crc32c_arch() code generation with clang
x86/crc64: implement crc64_be and crc64_nvme using new template
x86/crc-t10dif: implement crc_t10dif using new template
x86/crc32: implement crc32_le using new template
x86/crc: add "template" for [V]PCLMULQDQ based CRC functions
...
|
|
|
Linus Torvalds
|
2899aa3973 |
- First part of the MPAM work: split the architectural part of resctrl from the
filesystem part so that ARM's MPAM varian of resource control can be added
later while sharing the user interface with x86 (James Morse)
-----BEGIN PGP SIGNATURE-----
iQIzBAABCgAdFiEEzv7L6UO9uDPlPSfHEsHwGGHeVUoFAmfi118ACgkQEsHwGGHe
VUrhZhAAj9brJYnluZpNgOMl231QRJaK0Exz1TLMFvmEZxQSnRs6TJ4PVDqU7QQb
lrvqbobf77BfO8u3jtFLZvcoXxG+zzaTEoDEqGc/57Gu4G/kC64S8kYWa88aUf4I
lHS5kZvNUxVBh4L/33QaprigN61pZbhLoejOCdr3zWRJ62+/xoNXs1rV8N3Zwgdv
6p/B56MMi1CBXXHbFSzBI1bXSb/gW9jMjTnvrHbg3sOzrvVVuigJMVYgEfcEi0lh
npc0Iz/Gz3Bzemxcl05bm2eJ+Z9WR9CIHMp+PAewqL7eJCV0OBHUkClU9Ui92Js+
BA7XhL4XAnnZAaXHQoBfskGzcQ91pWPpkjJwSQO7y3zl8A8lvTFJCb89tZMWiLDl
bF9MmbyjJFMtEaIYLHlhoasilN2laRrnTW41ZhxEtSJ0IofE4OInJ2+pPB/TfT7O
HfZtkadIDrH6p5qLXy9bRwPxHskuM+NX0bw0OxWfu49DGw3O8pRhTFkiQ/+ofuBb
oJNwVBAH11AiXUZBR1ZunpYEkwMFlL4FyNOkq/OS6C51UUE72dYITR5HB0/wkTp2
cc2oiX3CSQPKrA4G8BAvMb7zGTmryXRZ7nOkTzScVTm8BoyyZf9F69aTpg1Deuuf
W8Z9WrabVBCEs7EhZ7OH9bvmpBFapoNDUwmt+gnTAw6U0QDspZw=
=FRzf
-----END PGP SIGNATURE-----
Merge tag 'x86_cache_for_v6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 resource control updates from Borislav Petkov:
- First part of the MPAM work: split the architectural part of resctrl
from the filesystem part so that ARM's MPAM varian of resource
control can be added later while sharing the user interface with x86
(James Morse)
* tag 'x86_cache_for_v6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (30 commits)
x86/resctrl: Move get_{mon,ctrl}_domain_from_cpu() to live with their callers
x86/resctrl: Move get_config_index() to a header
x86/resctrl: Handle throttle_mode for SMBA resources
x86/resctrl: Move RFTYPE flags to be managed by resctrl
x86/resctrl: Make resctrl_arch_pseudo_lock_fn() take a plr
x86/resctrl: Make prefetch_disable_bits belong to the arch code
x86/resctrl: Allow an architecture to disable pseudo lock
x86/resctrl: Add resctrl_arch_ prefix to pseudo lock functions
x86/resctrl: Move mbm_cfg_mask to struct rdt_resource
x86/resctrl: Move mba_mbps_default_event init to filesystem code
x86/resctrl: Change mon_event_config_{read,write}() to be arch helpers
x86/resctrl: Add resctrl_arch_is_evt_configurable() to abstract BMEC
x86/resctrl: Move the is_mbm_*_enabled() helpers to asm/resctrl.h
x86/resctrl: Rewrite and move the for_each_*_rdt_resource() walkers
x86/resctrl: Move monitor init work to a resctrl init call
x86/resctrl: Move monitor exit work to a resctrl exit call
x86/resctrl: Add an arch helper to reset one resource
x86/resctrl: Move resctrl types to a separate header
x86/resctrl: Move rdt_find_domain() to be visible to arch and fs code
x86/resctrl: Expose resctrl fs's init function to the rest of the kernel
...
|
|
|
Linus Torvalds
|
317a76a996 |
Updates for the VDSO infrastructure:
- Consolidate the VDSO storage
The VDSO data storage and data layout has been largely architecture
specific for historical reasons. That increases the maintenance effort
and causes inconsistencies over and over.
There is no real technical reason for architecture specific layouts and
implementations. The architecture specific details can easily be
integrated into a generic layout, which also reduces the amount of
duplicated code for managing the mappings.
Convert all architectures over to a unified layout and common mapping
infrastructure. This splits the VDSO data layout into subsystem
specific blocks, timekeeping, random and architecture parts, which
provides a better structure and allows to improve and update the
functionalities without conflict and interaction.
- Rework the timekeeping data storage
The current implementation is designed for exposing system timekeeping
accessors, which was good enough at the time when it was designed.
PTP and Time Sensitive Networking (TSN) change that as there are
requirements to expose independent PTP clocks, which are not related to
system timekeeping.
Replace the monolithic data storage by a structured layout, which
allows to add support for independent PTP clocks on top while reusing
both the data structures and the time accessor implementations.
-----BEGIN PGP SIGNATURE-----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=rwei
-----END PGP SIGNATURE-----
Merge tag 'timers-vdso-2025-03-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull VDSO infrastructure updates from Thomas Gleixner:
- Consolidate the VDSO storage
The VDSO data storage and data layout has been largely architecture
specific for historical reasons. That increases the maintenance
effort and causes inconsistencies over and over.
There is no real technical reason for architecture specific layouts
and implementations. The architecture specific details can easily be
integrated into a generic layout, which also reduces the amount of
duplicated code for managing the mappings.
Convert all architectures over to a unified layout and common mapping
infrastructure. This splits the VDSO data layout into subsystem
specific blocks, timekeeping, random and architecture parts, which
provides a better structure and allows to improve and update the
functionalities without conflict and interaction.
- Rework the timekeeping data storage
The current implementation is designed for exposing system
timekeeping accessors, which was good enough at the time when it was
designed.
PTP and Time Sensitive Networking (TSN) change that as there are
requirements to expose independent PTP clocks, which are not related
to system timekeeping.
Replace the monolithic data storage by a structured layout, which
allows to add support for independent PTP clocks on top while reusing
both the data structures and the time accessor implementations.
* tag 'timers-vdso-2025-03-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (55 commits)
sparc/vdso: Always reject undefined references during linking
x86/vdso: Always reject undefined references during linking
vdso: Rework struct vdso_time_data and introduce struct vdso_clock
vdso: Move architecture related data before basetime data
powerpc/vdso: Prepare introduction of struct vdso_clock
arm64/vdso: Prepare introduction of struct vdso_clock
x86/vdso: Prepare introduction of struct vdso_clock
time/namespace: Prepare introduction of struct vdso_clock
vdso/namespace: Rename timens_setup_vdso_data() to reflect new vdso_clock struct
vdso/vsyscall: Prepare introduction of struct vdso_clock
vdso/gettimeofday: Prepare helper functions for introduction of struct vdso_clock
vdso/gettimeofday: Prepare do_coarse_timens() for introduction of struct vdso_clock
vdso/gettimeofday: Prepare do_coarse() for introduction of struct vdso_clock
vdso/gettimeofday: Prepare do_hres_timens() for introduction of struct vdso_clock
vdso/gettimeofday: Prepare do_hres() for introduction of struct vdso_clock
vdso/gettimeofday: Prepare introduction of struct vdso_clock
vdso/helpers: Prepare introduction of struct vdso_clock
vdso/datapage: Define vdso_clock to prepare for multiple PTP clocks
vdso: Make vdso_time_data cacheline aligned
arm64: Make asm/cache.h compatible with vDSO
...
|
|
Mateusz Jończyk
|
2704ad556c |
x86/Kconfig: Fix lists in X86_EXTENDED_PLATFORM help text
Support for STA2X11-based systems was removed in February in: |
|
|
Mateusz Jończyk
|
99bb1bd810 |
x86/Kconfig: Correct X86_X2APIC help text
Currently, it is not true that the kernel will panic with CONFIG_X86_X2APIC=n
on systems that require it; it will try to disable the APIC and run without
it to at least give the user a clear warning message. See the second
variant of check_x2apic() in arch/x86/kernel/apic/apic.c .
Also massage some other parts of the help text.
Fixes:
|
|
|
Mateusz Jończyk
|
de7115636c |
x86/Kconfig: Document release year of glibc 2.3.3
I wonder how many people were checking their glibc version when considering whether to enable this option. Signed-off-by: Mateusz Jończyk <mat.jonczyk@o2.pl> Signed-off-by: David Heidelberg <david@ixit.cz> Signed-off-by: Ingo Molnar <mingo@kernel.org> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: https://lore.kernel.org/r/20250321-x86_x2apic-v3-7-b0cbaa6fa338@ixit.cz |
|
|
Mateusz Jończyk
|
d9f8780267 |
x86/Kconfig: Make CONFIG_PCI_CNB20LE_QUIRK depend on X86_32
I was unable to find a good description of the ServerWorks CNB20LE
chipset. However, it was probably exclusively used with the Pentium III
processor (this CPU model was used in all references to it that I
found where the CPU model was provided: dmesgs in [1] and [2];
[3] page 2; [4]-[7]).
As is widely known, the Pentium III processor did not support the 64-bit
mode, support for which was introduced by Intel a couple of years later.
So it is safe to assume that no systems with the CNB20LE chipset have
amd64 and the CONFIG_PCI_CNB20LE_QUIRK may now depend on X86_32.
Additionally, I have determined that most computers with the CNB20LE
chipset did have ACPI support and this driver was inactive on them.
I have submitted a patch to remove this driver, but it was met with
resistance [8].
[1] Jim Studt, Re: Problem with ServerWorks CNB20LE and lost interrupts
Linux Kernel Mailing List, https://lkml.org/lkml/2002/1/11/111
[2] RedHat Bug 665109 - e100 problems on old Compaq Proliant DL320
https://bugzilla.redhat.com/show_bug.cgi?id=665109
[3] R. Hughes-Jones, S. Dallison, G. Fairey, Performance Measurements on
Gigabit Ethernet NICs and Server Quality Motherboards,
http://datatag.web.cern.ch/papers/pfldnet2003-rhj.doc
[4] "Hardware for Linux",
Probe #d6b5151873 of Intel STL2-bd A28808-302 Desktop Computer (STL2)
https://linux-hardware.org/?probe=d6b5151873
[5] "Hardware for Linux", Probe #0b5d843f10 of Compaq ProLiant DL380
https://linux-hardware.org/?probe=0b5d843f10
[6] Ubuntu Forums, Dell Poweredge 2400 - Adaptec SCSI Bus AIC-7880
https://ubuntuforums.org/showthread.php?t=1689552
[7] Ira W. Snyder, "BISECTED: 2.6.35 (and -git) fail to boot: APIC problems"
https://lkml.org/lkml/2010/8/13/220
[8] Bjorn Helgaas, "Re: [PATCH] x86/pci: drop ServerWorks / Broadcom
CNB20LE PCI host bridge driver"
https://lore.kernel.org/lkml/20220318165535.GA840063@bhelgaas/T/
Signed-off-by: Mateusz Jończyk <mat.jonczyk@o2.pl>
Signed-off-by: David Heideberg <david@ixit.cz>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lore.kernel.org/r/20250321-x86_x2apic-v3-6-b0cbaa6fa338@ixit.cz
|
|
|
Mateusz Jończyk
|
21d8fb8d4e |
x86/Kconfig: Document CONFIG_PCI_MMCONFIG
This configuration option had no help text, so add it. CONFIG_EXPERT is enabled on some distribution kernels, so people using a distribution kernel's configuration as a starting point will see this option. [ mingo: Standardized the new Kconfig text a bit. ] Signed-off-by: Mateusz Jończyk <mat.jonczyk@o2.pl> Signed-off-by: David Heideberg <david@ixit.cz> Signed-off-by: Ingo Molnar <mingo@kernel.org> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: https://lore.kernel.org/r/20250321-x86_x2apic-v3-5-b0cbaa6fa338@ixit.cz |
|
|
Mateusz Jończyk
|
4047e8773f |
x86/Kconfig: Update lists in X86_EXTENDED_PLATFORM
The order of the entries matches the order they appear in Kconfig. In 2011, AMD Elan was moved to Kconfig.cpu and the dependency on X86_EXTENDED_PLATFORM was dropped in: |
|
|
Mateusz Jończyk
|
e35e328d37 |
x86/Kconfig: Move all X86_EXTENDED_PLATFORM options together
So that these options will be displayed together in menuconfig etc. Signed-off-by: Mateusz Jończyk <mat.jonczyk@o2.pl> Signed-off-by: David Heidelberg <david@ixit.cz> Signed-off-by: Ingo Molnar <mingo@kernel.org> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: https://lore.kernel.org/r/20250321-x86_x2apic-v3-3-b0cbaa6fa338@ixit.cz |
|
|
Mateusz Jończyk
|
31be5041dc |
x86/Kconfig: Always enable ARCH_SPARSEMEM_ENABLE
It appears that (X86_64 || X86_32) is always true on x86. This logical OR directive was introduced in: |
|
|
Mateusz Jończyk
|
9232c49ff3 |
x86/Kconfig: Enable X86_X2APIC by default and improve help text
As many current platforms (most modern Intel CPUs and QEMU) have x2APIC
present, enable CONFIG_X86_X2APIC by default as it gives performance
and functionality benefits. Additionally, if the BIOS has already
switched APIC to x2APIC mode, but CONFIG_X86_X2APIC is disabled, the
kernel will panic in arch/x86/kernel/apic/apic.c .
Also improve the help text, which was confusing and really did not
describe what the feature is about.
Help text references and discussion:
Both Intel [1] and AMD [3] spell the name as "x2APIC", not "x2apic".
"It allows faster access to the local APIC"
[2], chapter 2.1, page 15:
"More efficient MSR interface to access APIC registers."
"x2APIC was introduced in Intel CPUs around 2008":
I was unable to find specific information which Intel CPUs
support x2APIC. Wikipedia claims it was "introduced with the
Nehalem microarchitecture in November 2008", but I was not able
to confirm this independently. At least some Nehalem CPUs do not
support x2APIC [1].
The documentation [2] is dated June 2008. Linux kernel also
introduced x2APIC support in 2008, so the year seems to be
right.
"and in AMD EPYC CPUs in 2019":
[3], page 15:
"AMD introduced an x2APIC in our EPYC 7002 Series processors for
the first time."
"It is also frequently emulated in virtual machines, even when the host
CPU does not support it."
[1]
"If this configuration option is disabled, the kernel will not boot on
some platforms that have x2APIC enabled."
According to some BIOS documentation [4], the x2APIC may be
"disabled", "enabled", or "force enabled" on this system.
I think that "enabled" means "made available to the operating
system, but not already turned on" and "force enabled" means
"already switched to x2APIC mode when the OS boots". Only in the
latter mode a kernel without CONFIG_X86_X2APIC will panic in
validate_x2apic() in arch/x86/kernel/apic/apic.c .
QEMU 4.2.1 and my Intel HP laptop (bought in 2019) use the
"enabled" mode and the kernel does not panic.
[1] "Re: [Qemu-devel] [Question] why x2apic's set by default without host sup"
https://lists.gnu.org/archive/html/qemu-devel/2013-07/msg03527.html
[2] Intel® 64 Architecture x2APIC Specification,
( https://www.naic.edu/~phil/software/intel/318148.pdf )
[3] Workload Tuning Guide for AMD EPYC ™ 7002 Series Processor Based
Servers Application Note,
https://developer.amd.com/wp-content/resources/56745_0.80.pdf
[4] UEFI System Utilities and Shell Command Mobile Help for HPE ProLiant
Gen10, ProLiant Gen10 Plus Servers and HPE Synergy:
Enabling or disabling Processor x2APIC Support
https://techlibrary.hpe.com/docs/iss/proliant-gen10-uefi/s_enable_disable_x2APIC_support.html
Signed-off-by: Mateusz Jończyk <mat.jonczyk@o2.pl>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lore.kernel.org/r/20250321-x86_x2apic-v3-1-b0cbaa6fa338@ixit.cz
|
|
H. Peter Anvin (Intel)
|
3d37d9396e |
x86/cpufeatures: Add {REQUIRED,DISABLED} feature configs
Required and disabled feature masks completely rely on build configs, i.e., once a build config is fixed, so are the feature masks. To prepare for auto-generating the <asm/cpufeaturemasks.h> header with required and disabled feature masks based on a build config, add feature Kconfig items: - X86_REQUIRED_FEATURE_x - X86_DISABLED_FEATURE_x each of which may be set to "y" if and only if its preconditions from current build config are met. Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com> Signed-off-by: Xin Li (Intel) <xin@zytor.com> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Signed-off-by: Ingo Molnar <mingo@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: https://lore.kernel.org/r/20250228082338.73859-3-xin@zytor.com |
|
|
Ingo Molnar
|
89771319e0 |
Linux 6.14-rc7
-----BEGIN PGP SIGNATURE----- iQFSBAABCAA8FiEEq68RxlopcLEwq+PEeb4+QwBBGIYFAmfXVtUeHHRvcnZhbGRz QGxpbnV4LWZvdW5kYXRpb24ub3JnAAoJEHm+PkMAQRiGN/sH/i5423Gt/z51gDjA s4v5Z7GaBJ9zOGBahn2RWFe72zytTqKrEJmMnGfguirs0atD1DtQj4WAP7iFKP+e WyO663X6HF7i5y37ja0Yd4PZc31hwtqzKH8LjBf8f8tTy8UsEVqumdi5A4sS9KTM qm4kTyyVEY9D/s7oRY8ywjDlRJtO6nT0aKMp4kAqNEbrNUYbilT/a0hgXcgSmPyB uIjmjL2fZfutxGI5LgfbaSHCa1ElmhvTvivOMpaAmZSGCRVHCKGgT0CTNnHyn/7C dB145JkRO4ZOUqirCdO4PE/23id3ajq9fcixJGBzAv7c45y+B3JZ1r2kAfKalE8/ qrOKLys= =8r7a -----END PGP SIGNATURE----- Merge tag 'v6.14-rc7' into x86/core, to pick up fixes Signed-off-by: Ingo Molnar <mingo@kernel.org> |
|
Anshuman Khandual
|
f9aad62200 |
mm: rename GENERIC_PTDUMP and PTDUMP_CORE
Platforms subscribe into generic ptdump implementation via GENERIC_PTDUMP. But generic ptdump gets enabled via PTDUMP_CORE. These configs combination is confusing as they sound very similar and does not differentiate between platform's feature subscription and feature enablement for ptdump. Rename the configs as ARCH_HAS_PTDUMP and PTDUMP making it more clear and improve readability. Link: https://lkml.kernel.org/r/20250226122404.1927473-6-anshuman.khandual@arm.com Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu> (powerpc) Acked-by: Catalin Marinas <catalin.marinas@arm.com> [arm64] Cc: Will Deacon <will@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Marc Zyngier <maz@kernel.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Madhavan Srinivasan <maddy@linux.ibm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Steven Price <steven.price@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
|
Frank van der Linden
|
08efe29350 |
x86/mm: set ARCH_WANT_HUGETLB_VMEMMAP_PREINIT
Now that hugetlb bootmem pages are allocated earlier, and available for section preinit (HVO-style), set ARCH_WANT_HUGETLB_VMEMMAP_PREINIT for x86_64, so that is can be done. This enables pre-HVO on x86_64. Link: https://lkml.kernel.org/r/20250228182928.2645936-22-fvdl@google.com Signed-off-by: Frank van der Linden <fvdl@google.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Alexander Gordeev <agordeev@linux.ibm.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Dan Carpenter <dan.carpenter@linaro.org> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: David Hildenbrand <david@redhat.com> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Joao Martins <joao.m.martins@oracle.com> Cc: Madhavan Srinivasan <maddy@linux.ibm.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Muchun Song <muchun.song@linux.dev> Cc: Oscar Salvador <osalvador@suse.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Roman Gushchin (Cruise) <roman.gushchin@linux.dev> Cc: Usama Arif <usamaarif642@gmail.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Yu Zhao <yuzhao@google.com> Cc: Zi Yan <ziy@nvidia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
|
Ard Biesheuvel
|
9b400d1725 |
kbuild: Introduce Kconfig symbol for linking vmlinux with relocations
Some architectures build vmlinux with static relocations preserved, but strip them again from the final vmlinux image. Arch specific tools consume these static relocations in order to construct relocation tables for KASLR. The fact that vmlinux is created, consumed and subsequently updated goes against the typical, declarative paradigm used by Make, which is based on rules and dependencies. So as a first step towards cleaning this up, introduce a Kconfig symbol to declare that the arch wants to consume the static relocations emitted into vmlinux. This will be wired up further in subsequent patches. Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> |
|
|
James Morse
|
7028840552 |
x86/resctrl: Allow an architecture to disable pseudo lock
Pseudo-lock relies on knowledge of the micro-architecture to disable prefetchers etc. On arm64 these controls are typically secure only, meaning Linux can't access them. Arm's cache-lockdown feature works in a very different way. Resctrl's pseudo-lock isn't going to be used on arm64 platforms. Add a Kconfig symbol that can be selected by the architecture. This enables or disables building of the pseudo_lock.c file, and replaces the functions with stubs. An additional IS_ENABLED() check is needed in rdtgroup_mode_write() so that attempting to enable pseudo-lock reports an "Unknown or unsupported mode" to user-space via the last_cmd_status file. Signed-off-by: James Morse <james.morse@arm.com> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Reviewed-by: Shaopeng Tan <tan.shaopeng@jp.fujitsu.com> Reviewed-by: Tony Luck <tony.luck@intel.com> Reviewed-by: Reinette Chatre <reinette.chatre@intel.com> Reviewed-by: Fenghua Yu <fenghuay@nvidia.com> Reviewed-by: Babu Moger <babu.moger@amd.com> Tested-by: Carl Worth <carl@os.amperecomputing.com> # arm64 Tested-by: Shaopeng Tan <tan.shaopeng@jp.fujitsu.com> Tested-by: Peter Newman <peternewman@google.com> Tested-by: Amit Singh Tomar <amitsinght@marvell.com> # arm64 Tested-by: Shanker Donthineni <sdonthineni@nvidia.com> # arm64 Tested-by: Babu Moger <babu.moger@amd.com> Link: https://lore.kernel.org/r/20250311183715.16445-25-james.morse@arm.com |
|
|
Ingo Molnar
|
71c2ff150f |
Merge branch 'x86/asm' into x86/core, to pick up dependent commits
Signed-off-by: Ingo Molnar <mingo@kernel.org> |
|
|
Ingo Molnar
|
cfdaa618de |
Merge branch 'x86/cpu' into x86/asm, to pick up dependent commits
Signed-off-by: Ingo Molnar <mingo@kernel.org> |
|
|
H. Peter Anvin (Intel)
|
909639aa58 |
x86/cpufeatures: Rename X86_CMPXCHG64 to X86_CX8
Replace X86_CMPXCHG64 with X86_CX8, as CX8 is the name of the CPUID flag, thus to make it consistent with X86_FEATURE_CX8 defined in <asm/cpufeatures.h>. No functional change intended. Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com> Signed-off-by: Xin Li (Intel) <xin@zytor.com> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Reviewed-by: Ingo Molnar <mingo@kernel.org> Link: https://lore.kernel.org/r/20250228082338.73859-2-xin@zytor.com |