mirror of https://github.com/torvalds/linux.git
669 Commits
| Author | SHA1 | Message | Date |
|---|---|---|---|
Thomas Gleixner
|
c90399fbd7 |
x86/cpu: Ensure that CPU info updates are propagated on UP
The boot sequence evaluates CPUID information twice:
1) During early boot
2) When finalizing the early setup right before
mitigations are selected and alternatives are patched.
In both cases the evaluation is stored in boot_cpu_data, but on UP the
copying of boot_cpu_data to the per CPU info of the boot CPU happens
between #1 and #2. So any update which happens in #2 is never propagated to
the per CPU info instance.
Consolidate the whole logic and copy boot_cpu_data right before applying
alternatives as that's the point where boot_cpu_data is in it's final
state and not supposed to change anymore.
This also removes the voodoo mb() from smp_prepare_cpus_common() which
had absolutely no purpose.
Fixes:
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Linus Torvalds
|
902861e34c |
- Sumanth Korikkar has taught s390 to allocate hotplug-time page frames
from hotplugged memory rather than only from main memory. Series
"implement "memmap on memory" feature on s390".
- More folio conversions from Matthew Wilcox in the series
"Convert memcontrol charge moving to use folios"
"mm: convert mm counter to take a folio"
- Chengming Zhou has optimized zswap's rbtree locking, providing
significant reductions in system time and modest but measurable
reductions in overall runtimes. The series is "mm/zswap: optimize the
scalability of zswap rb-tree".
- Chengming Zhou has also provided the series "mm/zswap: optimize zswap
lru list" which provides measurable runtime benefits in some
swap-intensive situations.
- And Chengming Zhou further optimizes zswap in the series "mm/zswap:
optimize for dynamic zswap_pools". Measured improvements are modest.
- zswap cleanups and simplifications from Yosry Ahmed in the series "mm:
zswap: simplify zswap_swapoff()".
- In the series "Add DAX ABI for memmap_on_memory", Vishal Verma has
contributed several DAX cleanups as well as adding a sysfs tunable to
control the memmap_on_memory setting when the dax device is hotplugged
as system memory.
- Johannes Weiner has added the large series "mm: zswap: cleanups",
which does that.
- More DAMON work from SeongJae Park in the series
"mm/damon: make DAMON debugfs interface deprecation unignorable"
"selftests/damon: add more tests for core functionalities and corner cases"
"Docs/mm/damon: misc readability improvements"
"mm/damon: let DAMOS feeds and tame/auto-tune itself"
- In the series "mm/mempolicy: weighted interleave mempolicy and sysfs
extension" Rakie Kim has developed a new mempolicy interleaving policy
wherein we allocate memory across nodes in a weighted fashion rather
than uniformly. This is beneficial in heterogeneous memory environments
appearing with CXL.
- Christophe Leroy has contributed some cleanup and consolidation work
against the ARM pagetable dumping code in the series "mm: ptdump:
Refactor CONFIG_DEBUG_WX and check_wx_pages debugfs attribute".
- Luis Chamberlain has added some additional xarray selftesting in the
series "test_xarray: advanced API multi-index tests".
- Muhammad Usama Anjum has reworked the selftest code to make its
human-readable output conform to the TAP ("Test Anything Protocol")
format. Amongst other things, this opens up the use of third-party
tools to parse and process out selftesting results.
- Ryan Roberts has added fork()-time PTE batching of THP ptes in the
series "mm/memory: optimize fork() with PTE-mapped THP". Mainly
targeted at arm64, this significantly speeds up fork() when the process
has a large number of pte-mapped folios.
- David Hildenbrand also gets in on the THP pte batching game in his
series "mm/memory: optimize unmap/zap with PTE-mapped THP". It
implements batching during munmap() and other pte teardown situations.
The microbenchmark improvements are nice.
- And in the series "Transparent Contiguous PTEs for User Mappings" Ryan
Roberts further utilizes arm's pte's contiguous bit ("contpte
mappings"). Kernel build times on arm64 improved nicely. Ryan's series
"Address some contpte nits" provides some followup work.
- In the series "mm/hugetlb: Restore the reservation" Breno Leitao has
fixed an obscure hugetlb race which was causing unnecessary page faults.
He has also added a reproducer under the selftest code.
- In the series "selftests/mm: Output cleanups for the compaction test",
Mark Brown did what the title claims.
- Kinsey Ho has added the series "mm/mglru: code cleanup and refactoring".
- Even more zswap material from Nhat Pham. The series "fix and extend
zswap kselftests" does as claimed.
- In the series "Introduce cpu_dcache_is_aliasing() to fix DAX
regression" Mathieu Desnoyers has cleaned up and fixed rather a mess in
our handling of DAX on archiecctures which have virtually aliasing data
caches. The arm architecture is the main beneficiary.
- Lokesh Gidra's series "per-vma locks in userfaultfd" provides dramatic
improvements in worst-case mmap_lock hold times during certain
userfaultfd operations.
- Some page_owner enhancements and maintenance work from Oscar Salvador
in his series
"page_owner: print stacks and their outstanding allocations"
"page_owner: Fixup and cleanup"
- Uladzislau Rezki has contributed some vmalloc scalability improvements
in his series "Mitigate a vmap lock contention". It realizes a 12x
improvement for a certain microbenchmark.
- Some kexec/crash cleanup work from Baoquan He in the series "Split
crash out from kexec and clean up related config items".
- Some zsmalloc maintenance work from Chengming Zhou in the series
"mm/zsmalloc: fix and optimize objects/page migration"
"mm/zsmalloc: some cleanup for get/set_zspage_mapping()"
- Zi Yan has taught the MM to perform compaction on folios larger than
order=0. This a step along the path to implementaton of the merging of
large anonymous folios. The series is named "Enable >0 order folio
memory compaction".
- Christoph Hellwig has done quite a lot of cleanup work in the
pagecache writeback code in his series "convert write_cache_pages() to
an iterator".
- Some modest hugetlb cleanups and speedups in Vishal Moola's series
"Handle hugetlb faults under the VMA lock".
- Zi Yan has changed the page splitting code so we can split huge pages
into sizes other than order-0 to better utilize large folios. The
series is named "Split a folio to any lower order folios".
- David Hildenbrand has contributed the series "mm: remove
total_mapcount()", a cleanup.
- Matthew Wilcox has sought to improve the performance of bulk memory
freeing in his series "Rearrange batched folio freeing".
- Gang Li's series "hugetlb: parallelize hugetlb page init on boot"
provides large improvements in bootup times on large machines which are
configured to use large numbers of hugetlb pages.
- Matthew Wilcox's series "PageFlags cleanups" does that.
- Qi Zheng's series "minor fixes and supplement for ptdesc" does that
also. S390 is affected.
- Cleanups to our pagemap utility functions from Peter Xu in his series
"mm/treewide: Replace pXd_large() with pXd_leaf()".
- Nico Pache has fixed a few things with our hugepage selftests in his
series "selftests/mm: Improve Hugepage Test Handling in MM Selftests".
- Also, of course, many singleton patches to many things. Please see
the individual changelogs for details.
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Merge tag 'mm-stable-2024-03-13-20-04' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull MM updates from Andrew Morton:
- Sumanth Korikkar has taught s390 to allocate hotplug-time page frames
from hotplugged memory rather than only from main memory. Series
"implement "memmap on memory" feature on s390".
- More folio conversions from Matthew Wilcox in the series
"Convert memcontrol charge moving to use folios"
"mm: convert mm counter to take a folio"
- Chengming Zhou has optimized zswap's rbtree locking, providing
significant reductions in system time and modest but measurable
reductions in overall runtimes. The series is "mm/zswap: optimize the
scalability of zswap rb-tree".
- Chengming Zhou has also provided the series "mm/zswap: optimize zswap
lru list" which provides measurable runtime benefits in some
swap-intensive situations.
- And Chengming Zhou further optimizes zswap in the series "mm/zswap:
optimize for dynamic zswap_pools". Measured improvements are modest.
- zswap cleanups and simplifications from Yosry Ahmed in the series
"mm: zswap: simplify zswap_swapoff()".
- In the series "Add DAX ABI for memmap_on_memory", Vishal Verma has
contributed several DAX cleanups as well as adding a sysfs tunable to
control the memmap_on_memory setting when the dax device is
hotplugged as system memory.
- Johannes Weiner has added the large series "mm: zswap: cleanups",
which does that.
- More DAMON work from SeongJae Park in the series
"mm/damon: make DAMON debugfs interface deprecation unignorable"
"selftests/damon: add more tests for core functionalities and corner cases"
"Docs/mm/damon: misc readability improvements"
"mm/damon: let DAMOS feeds and tame/auto-tune itself"
- In the series "mm/mempolicy: weighted interleave mempolicy and sysfs
extension" Rakie Kim has developed a new mempolicy interleaving
policy wherein we allocate memory across nodes in a weighted fashion
rather than uniformly. This is beneficial in heterogeneous memory
environments appearing with CXL.
- Christophe Leroy has contributed some cleanup and consolidation work
against the ARM pagetable dumping code in the series "mm: ptdump:
Refactor CONFIG_DEBUG_WX and check_wx_pages debugfs attribute".
- Luis Chamberlain has added some additional xarray selftesting in the
series "test_xarray: advanced API multi-index tests".
- Muhammad Usama Anjum has reworked the selftest code to make its
human-readable output conform to the TAP ("Test Anything Protocol")
format. Amongst other things, this opens up the use of third-party
tools to parse and process out selftesting results.
- Ryan Roberts has added fork()-time PTE batching of THP ptes in the
series "mm/memory: optimize fork() with PTE-mapped THP". Mainly
targeted at arm64, this significantly speeds up fork() when the
process has a large number of pte-mapped folios.
- David Hildenbrand also gets in on the THP pte batching game in his
series "mm/memory: optimize unmap/zap with PTE-mapped THP". It
implements batching during munmap() and other pte teardown
situations. The microbenchmark improvements are nice.
- And in the series "Transparent Contiguous PTEs for User Mappings"
Ryan Roberts further utilizes arm's pte's contiguous bit ("contpte
mappings"). Kernel build times on arm64 improved nicely. Ryan's
series "Address some contpte nits" provides some followup work.
- In the series "mm/hugetlb: Restore the reservation" Breno Leitao has
fixed an obscure hugetlb race which was causing unnecessary page
faults. He has also added a reproducer under the selftest code.
- In the series "selftests/mm: Output cleanups for the compaction
test", Mark Brown did what the title claims.
- Kinsey Ho has added the series "mm/mglru: code cleanup and
refactoring".
- Even more zswap material from Nhat Pham. The series "fix and extend
zswap kselftests" does as claimed.
- In the series "Introduce cpu_dcache_is_aliasing() to fix DAX
regression" Mathieu Desnoyers has cleaned up and fixed rather a mess
in our handling of DAX on archiecctures which have virtually aliasing
data caches. The arm architecture is the main beneficiary.
- Lokesh Gidra's series "per-vma locks in userfaultfd" provides
dramatic improvements in worst-case mmap_lock hold times during
certain userfaultfd operations.
- Some page_owner enhancements and maintenance work from Oscar Salvador
in his series
"page_owner: print stacks and their outstanding allocations"
"page_owner: Fixup and cleanup"
- Uladzislau Rezki has contributed some vmalloc scalability
improvements in his series "Mitigate a vmap lock contention". It
realizes a 12x improvement for a certain microbenchmark.
- Some kexec/crash cleanup work from Baoquan He in the series "Split
crash out from kexec and clean up related config items".
- Some zsmalloc maintenance work from Chengming Zhou in the series
"mm/zsmalloc: fix and optimize objects/page migration"
"mm/zsmalloc: some cleanup for get/set_zspage_mapping()"
- Zi Yan has taught the MM to perform compaction on folios larger than
order=0. This a step along the path to implementaton of the merging
of large anonymous folios. The series is named "Enable >0 order folio
memory compaction".
- Christoph Hellwig has done quite a lot of cleanup work in the
pagecache writeback code in his series "convert write_cache_pages()
to an iterator".
- Some modest hugetlb cleanups and speedups in Vishal Moola's series
"Handle hugetlb faults under the VMA lock".
- Zi Yan has changed the page splitting code so we can split huge pages
into sizes other than order-0 to better utilize large folios. The
series is named "Split a folio to any lower order folios".
- David Hildenbrand has contributed the series "mm: remove
total_mapcount()", a cleanup.
- Matthew Wilcox has sought to improve the performance of bulk memory
freeing in his series "Rearrange batched folio freeing".
- Gang Li's series "hugetlb: parallelize hugetlb page init on boot"
provides large improvements in bootup times on large machines which
are configured to use large numbers of hugetlb pages.
- Matthew Wilcox's series "PageFlags cleanups" does that.
- Qi Zheng's series "minor fixes and supplement for ptdesc" does that
also. S390 is affected.
- Cleanups to our pagemap utility functions from Peter Xu in his series
"mm/treewide: Replace pXd_large() with pXd_leaf()".
- Nico Pache has fixed a few things with our hugepage selftests in his
series "selftests/mm: Improve Hugepage Test Handling in MM
Selftests".
- Also, of course, many singleton patches to many things. Please see
the individual changelogs for details.
* tag 'mm-stable-2024-03-13-20-04' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (435 commits)
mm/zswap: remove the memcpy if acomp is not sleepable
crypto: introduce: acomp_is_async to expose if comp drivers might sleep
memtest: use {READ,WRITE}_ONCE in memory scanning
mm: prohibit the last subpage from reusing the entire large folio
mm: recover pud_leaf() definitions in nopmd case
selftests/mm: skip the hugetlb-madvise tests on unmet hugepage requirements
selftests/mm: skip uffd hugetlb tests with insufficient hugepages
selftests/mm: dont fail testsuite due to a lack of hugepages
mm/huge_memory: skip invalid debugfs new_order input for folio split
mm/huge_memory: check new folio order when split a folio
mm, vmscan: retry kswapd's priority loop with cache_trim_mode off on failure
mm: add an explicit smp_wmb() to UFFDIO_CONTINUE
mm: fix list corruption in put_pages_list
mm: remove folio from deferred split list before uncharging it
filemap: avoid unnecessary major faults in filemap_fault()
mm,page_owner: drop unnecessary check
mm,page_owner: check for null stack_record before bumping its refcount
mm: swap: fix race between free_swap_and_cache() and swapoff()
mm/treewide: align up pXd_leaf() retval across archs
mm/treewide: drop pXd_large()
...
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Linus Torvalds
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fcc196579a |
Misc cleanups, including a large series from Thomas Gleixner to
cure Sparse warnings. Signed-off-by: Ingo Molnar <mingo@kernel.org> -----BEGIN PGP SIGNATURE----- iQJFBAABCgAvFiEEBpT5eoXrXCwVQwEKEnMQ0APhK1gFAmXvAFQRHG1pbmdvQGtl cm5lbC5vcmcACgkQEnMQ0APhK1hkDRAAwASVCQ88kiGqNQtHibXlK54mAFGsc0xv T8OPds15DUzoLg/y8lw0X0DHly6MdGXVmygybejNIw2BN4lhLjQ7f4Ria7rv7LDy FcI1jfvysEMyYRFHGRefb/GBFzuEfKoROwf+QylGmKz0ZK674gNMngsI9pwOBdbe wElq3IkHoNuTUfH9QA4BvqGam1n122nvVTop3g0PMHWzx9ky8hd/BEUjXFZhfINL zZk3fwUbER2QYbhHt+BN2GRbdf2BrKvqTkXpKxyXTdnpiqAo0CzBGKerZ62H82qG n737Nib1lrsfM5yDHySnau02aamRXaGvCJUd6gpac1ZmNpZMWhEOT/0Tr/Nj5ztF lUAvKqMZn/CwwQky1/XxD0LHegnve0G+syqQt/7x7o1ELdiwTzOWMCx016UeodzB yyHf3Xx9J8nt3snlrlZBaGEfegg9ePLu5Vir7iXjg3vrloUW8A+GZM62NVxF4HVV QWF80BfWf8zbLQ/OS1382t1shaioIe5pEXzIjcnyVIZCiiP2/5kP2O6P4XVbwVlo Ca5eEt8U1rtsLUZaCzI2ZRTQf/8SLMQWyaV+ZmkVwcVdFoARC31EgdE5wYYoZOf6 7Vl+rXd+rZCuTWk0ZgznCZEm75aaqukaQCBa2V8hIVociLFVzhg/Tjedv7s0CspA hNfxdN1LDZc= =0eJ7 -----END PGP SIGNATURE----- Merge tag 'x86-cleanups-2024-03-11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 cleanups from Ingo Molnar: "Misc cleanups, including a large series from Thomas Gleixner to cure sparse warnings" * tag 'x86-cleanups-2024-03-11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/nmi: Drop unused declaration of proc_nmi_enabled() x86/callthunks: Use EXPORT_PER_CPU_SYMBOL_GPL() for per CPU variables x86/cpu: Provide a declaration for itlb_multihit_kvm_mitigation x86/cpu: Use EXPORT_PER_CPU_SYMBOL_GPL() for x86_spec_ctrl_current x86/uaccess: Add missing __force to casts in __access_ok() and valid_user_address() x86/percpu: Cure per CPU madness on UP smp: Consolidate smp_prepare_boot_cpu() x86/msr: Add missing __percpu annotations x86/msr: Prepare for including <linux/percpu.h> into <asm/msr.h> perf/x86/amd/uncore: Fix __percpu annotation x86/nmi: Remove an unnecessary IS_ENABLED(CONFIG_SMP) x86/apm_32: Remove dead function apm_get_battery_status() x86/insn-eval: Fix function param name in get_eff_addr_sib() |
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Thomas Gleixner
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71eb4893cf |
x86/percpu: Cure per CPU madness on UP
On UP builds Sparse complains rightfully about accesses to cpu_info with per CPU accessors: cacheinfo.c:282:30: sparse: warning: incorrect type in initializer (different address spaces) cacheinfo.c:282:30: sparse: expected void const [noderef] __percpu *__vpp_verify cacheinfo.c:282:30: sparse: got unsigned int * The reason is that on UP builds cpu_info which is a per CPU variable on SMP is mapped to boot_cpu_info which is a regular variable. There is a hideous accessor cpu_data() which tries to hide this, but it's not sufficient as some places require raw accessors and generates worse code than the regular per CPU accessors. Waste sizeof(struct x86_cpuinfo) memory on UP and provide the per CPU cpu_info unconditionally. This requires to update the CPU info on the boot CPU as SMP does. (Ab)use the weakly defined smp_prepare_boot_cpu() function and implement exactly that. This allows to use regular per CPU accessors uncoditionally and paves the way to remove the cpu_data() hackery. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lore.kernel.org/r/20240304005104.622511517@linutronix.de |
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Baoquan He
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a4eeb2176d |
x86, crash: wrap crash dumping code into crash related ifdefs
Now crash codes under kernel/ folder has been split out from kexec code, crash dumping can be separated from kexec reboot in config items on x86 with some adjustments. Here, also change some ifdefs or IS_ENABLED() check to more appropriate ones, e,g - #ifdef CONFIG_KEXEC_CORE -> #ifdef CONFIG_CRASH_DUMP - (!IS_ENABLED(CONFIG_KEXEC_CORE)) - > (!IS_ENABLED(CONFIG_CRASH_RESERVE)) [bhe@redhat.com: don't nest CONFIG_CRASH_DUMP ifdef inside CONFIG_KEXEC_CODE ifdef scope] Link: https://lore.kernel.org/all/SN6PR02MB4157931105FA68D72E3D3DB8D47B2@SN6PR02MB4157.namprd02.prod.outlook.com/T/#u Link: https://lkml.kernel.org/r/20240124051254.67105-7-bhe@redhat.com Signed-off-by: Baoquan He <bhe@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Hari Bathini <hbathini@linux.ibm.com> Cc: Pingfan Liu <piliu@redhat.com> Cc: Klara Modin <klarasmodin@gmail.com> Cc: Michael Kelley <mhklinux@outlook.com> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Yang Li <yang.lee@linux.alibaba.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
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Thomas Gleixner
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7c0edad364 |
x86/cpu/topology: Rework possible CPU management
Managing possible CPUs is an unreadable and uncomprehensible maze. Aside of
that it's backwards because it applies command line limits after
registering all APICs.
Rewrite it so that it:
- Applies the command line limits upfront so that only the allowed amount
of APIC IDs can be registered.
- Applies eventual late restrictions in an understandable way
- Uses simple min_t() calculations which are trivial to follow.
- Provides a separate function for resetting to UP mode late in the
bringup process.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Michael Kelley <mhklinux@outlook.com>
Tested-by: Sohil Mehta <sohil.mehta@intel.com>
Link: https://lore.kernel.org/r/20240213210252.290098853@linutronix.de
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Thomas Gleixner
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de6aec2417 |
x86/mm/numa: Move early mptable evaluation into common code
There is no reason to have the early mptable evaluation conditionally invoked only from the AMD numa topology code. Make it explicit and invoke it from setup_arch() right after the corresponding ACPI init call. Remove the pointless wrapper and invoke x86_init::mpparse::early_parse_smp_config() directly. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Michael Kelley <mhklinux@outlook.com> Tested-by: Sohil Mehta <sohil.mehta@intel.com> Link: https://lore.kernel.org/r/20240212154639.931761608@linutronix.de |
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Thomas Gleixner
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dcb7600849 |
x86/mpparse: Switch to new init callbacks
Now that all platforms have the new split SMP configuration callbacks set up, flip the switch and remove the old callback pointer and mop up the platform code. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Michael Kelley <mhklinux@outlook.com> Tested-by: Sohil Mehta <sohil.mehta@intel.com> Link: https://lore.kernel.org/r/20240212154639.870883080@linutronix.de |
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Thomas Gleixner
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5faf8ec771 |
x86/dtb: Rename x86_dtb_init()
x86_dtb_init() is a misnomer and it really should be used as a SMP configuration parser which is selected by the platform via x86_init::mpparse:parse_smp_config(). Rename it to x86_dtb_parse_smp_config() in preparation for that. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Michael Kelley <mhklinux@outlook.com> Tested-by: Sohil Mehta <sohil.mehta@intel.com> Link: https://lore.kernel.org/r/20240212154639.495992801@linutronix.de |
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Thomas Gleixner
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e061c7ae08 |
x86/mpparse: Rename default_find_smp_config()
MPTABLE is no longer the default SMP configuration mechanism. Rename it to mpparse_find_mptable() because that's what it does. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Michael Kelley <mhklinux@outlook.com> Tested-by: Sohil Mehta <sohil.mehta@intel.com> Link: https://lore.kernel.org/r/20240212154639.306287711@linutronix.de |
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Linus Torvalds
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b4442cadca |
- Add support managing TDX host hardware
-----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEV76QKkVc4xCGURexaDWVMHDJkrAFAmWfCRQACgkQaDWVMHDJ krDUqQ//VCvkpf0mAbYDJa1oTXFW8O5cVTusBtPi8k7cFbtjQpjno/9AqKol+sK8 AKg+y5iHHl7QJmDmEcpS+O9OBbmFOpvDzm3QZhk8RkWS5pe0B108dnINYtS0eP9R MkzZwfrI2yC6NX4hvHGdD8WGHjrt+oxY0bojehX87JZsyRU+xqc/g1OO7a5bUPQe 3Ip0kKiCeqFv0y+Q1pFMEd9RdZ8XxqzUHCJT3hfgZ6FajJ2eVy6jNrPOm6LozycB eOtYYNapSgw3k/WhJCOYWHX7kePXibLxBRONLpi6P3U6pMVk4n8wrgl7qPtdW1Qx nR2UHX5P6eFkxNCuU1BzvmPBROe37C51MFVw29eRnigvuX3j/vfCH1+17xQOVKVv 5JyxYA0rJWqoOz6mX7YaNJHlmrxHzeKXudICyOFuu1j5c8CuGjh8NQsOSCq16XfZ hPzfYDUS8I7/kHYQPJlnB+kF9pmbyjTM70h74I8D6ZWvXESHJZt+TYPyWfkBXP/P L9Pwx1onAyoBApGxCWuvgGTLonzNredgYG4ABbqhUqxqncJS9M7Y/yJa+f+3SOkR T6LxoByuDVld5cIfbOzRwIaRezZDe/NL7rkHm/DWo98OaV3zILsr20Hx1lPZ1Vce ryZ9lCdZGGxm2jmpzr/VymPQz/E+ezahRHE1+F3su8jpCU41txg= =1EJI -----END PGP SIGNATURE----- Merge tag 'x86_tdx_for_6.8' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 TDX updates from Dave Hansen: "This contains the initial support for host-side TDX support so that KVM can run TDX-protected guests. This does not include the actual KVM-side support which will come from the KVM folks. The TDX host interactions with kexec also needs to be ironed out before this is ready for prime time, so this code is currently Kconfig'd off when kexec is on. The majority of the code here is the kernel telling the TDX module which memory to protect and handing some additional memory over to it to use to store TDX module metadata. That sounds pretty simple, but the TDX architecture is rather flexible and it takes quite a bit of back-and-forth to say, "just protect all memory, please." There is also some code tacked on near the end of the series to handle a hardware erratum. The erratum can make software bugs such as a kernel write to TDX-protected memory cause a machine check and masquerade as a real hardware failure. The erratum handling watches out for these and tries to provide nicer user errors" * tag 'x86_tdx_for_6.8' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (21 commits) x86/virt/tdx: Make TDX host depend on X86_MCE x86/virt/tdx: Disable TDX host support when kexec is enabled Documentation/x86: Add documentation for TDX host support x86/mce: Differentiate real hardware #MCs from TDX erratum ones x86/cpu: Detect TDX partial write machine check erratum x86/virt/tdx: Handle TDX interaction with sleep and hibernation x86/virt/tdx: Initialize all TDMRs x86/virt/tdx: Configure global KeyID on all packages x86/virt/tdx: Configure TDX module with the TDMRs and global KeyID x86/virt/tdx: Designate reserved areas for all TDMRs x86/virt/tdx: Allocate and set up PAMTs for TDMRs x86/virt/tdx: Fill out TDMRs to cover all TDX memory regions x86/virt/tdx: Add placeholder to construct TDMRs to cover all TDX memory regions x86/virt/tdx: Get module global metadata for module initialization x86/virt/tdx: Use all system memory when initializing TDX module as TDX memory x86/virt/tdx: Add skeleton to enable TDX on demand x86/virt/tdx: Add SEAMCALL error printing for module initialization x86/virt/tdx: Handle SEAMCALL no entropy error in common code x86/virt/tdx: Make INTEL_TDX_HOST depend on X86_X2APIC x86/virt/tdx: Define TDX supported page sizes as macros ... |
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Kai Huang
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abe8dbab8f |
x86/virt/tdx: Use all system memory when initializing TDX module as TDX memory
Start to transit out the "multi-steps" to initialize the TDX module. TDX provides increased levels of memory confidentiality and integrity. This requires special hardware support for features like memory encryption and storage of memory integrity checksums. Not all memory satisfies these requirements. As a result, TDX introduced the concept of a "Convertible Memory Region" (CMR). During boot, the firmware builds a list of all of the memory ranges which can provide the TDX security guarantees. The list of these ranges is available to the kernel by querying the TDX module. CMRs tell the kernel which memory is TDX compatible. The kernel needs to build a list of memory regions (out of CMRs) as "TDX-usable" memory and pass them to the TDX module. Once this is done, those "TDX-usable" memory regions are fixed during module's lifetime. To keep things simple, assume that all TDX-protected memory will come from the page allocator. Make sure all pages in the page allocator *are* TDX-usable memory. As TDX-usable memory is a fixed configuration, take a snapshot of the memory configuration from memblocks at the time of module initialization (memblocks are modified on memory hotplug). This snapshot is used to enable TDX support for *this* memory configuration only. Use a memory hotplug notifier to ensure that no other RAM can be added outside of this configuration. This approach requires all memblock memory regions at the time of module initialization to be TDX convertible memory to work, otherwise module initialization will fail in a later SEAMCALL when passing those regions to the module. This approach works when all boot-time "system RAM" is TDX convertible memory and no non-TDX-convertible memory is hot-added to the core-mm before module initialization. For instance, on the first generation of TDX machines, both CXL memory and NVDIMM are not TDX convertible memory. Using kmem driver to hot-add any CXL memory or NVDIMM to the core-mm before module initialization will result in failure to initialize the module. The SEAMCALL error code will be available in the dmesg to help user to understand the failure. Signed-off-by: Kai Huang <kai.huang@intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: "Huang, Ying" <ying.huang@intel.com> Reviewed-by: Isaku Yamahata <isaku.yamahata@intel.com> Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Link: https://lore.kernel.org/all/20231208170740.53979-7-dave.hansen%40intel.com |
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Yuntao Wang
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f7a25cf1d4 |
x86/setup: Make relocated_ramdisk a local variable of relocate_initrd()
After
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Linus Torvalds
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1f24458a10 |
TTY/Serial changes for 6.7-rc1
Here is the big set of tty/serial driver changes for 6.7-rc1. Included
in here are:
- console/vgacon cleanups and removals from Arnd
- tty core and n_tty cleanups from Jiri
- lots of 8250 driver updates and cleanups
- sc16is7xx serial driver updates
- dt binding updates
- first set of port lock wrapers from Thomas for the printk fixes
coming in future releases
- other small serial and tty core cleanups and updates
All of these have been in linux-next for a while with no reported
issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-6.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty and serial updates from Greg KH:
"Here is the big set of tty/serial driver changes for 6.7-rc1. Included
in here are:
- console/vgacon cleanups and removals from Arnd
- tty core and n_tty cleanups from Jiri
- lots of 8250 driver updates and cleanups
- sc16is7xx serial driver updates
- dt binding updates
- first set of port lock wrapers from Thomas for the printk fixes
coming in future releases
- other small serial and tty core cleanups and updates
All of these have been in linux-next for a while with no reported
issues"
* tag 'tty-6.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (193 commits)
serdev: Replace custom code with device_match_acpi_handle()
serdev: Simplify devm_serdev_device_open() function
serdev: Make use of device_set_node()
tty: n_gsm: add copyright Siemens Mobility GmbH
tty: n_gsm: fix race condition in status line change on dead connections
serial: core: Fix runtime PM handling for pending tx
vgacon: fix mips/sibyte build regression
dt-bindings: serial: drop unsupported samsung bindings
tty: serial: samsung: drop earlycon support for unsupported platforms
tty: 8250: Add note for PX-835
tty: 8250: Fix IS-200 PCI ID comment
tty: 8250: Add Brainboxes Oxford Semiconductor-based quirks
tty: 8250: Add support for Intashield IX cards
tty: 8250: Add support for additional Brainboxes PX cards
tty: 8250: Fix up PX-803/PX-857
tty: 8250: Fix port count of PX-257
tty: 8250: Add support for Intashield IS-100
tty: 8250: Add support for Brainboxes UP cards
tty: 8250: Add support for additional Brainboxes UC cards
tty: 8250: Remove UC-257 and UC-431
...
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Linus Torvalds
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8f6f76a6a2 |
As usual, lots of singleton and doubleton patches all over the tree and
there's little I can say which isn't in the individual changelogs.
The lengthier patch series are
- "kdump: use generic functions to simplify crashkernel reservation in
arch", from Baoquan He. This is mainly cleanups and consolidation of
the "crashkernel=" kernel parameter handling.
- After much discussion, David Laight's "minmax: Relax type checks in
min() and max()" is here. Hopefully reduces some typecasting and the
use of min_t() and max_t().
- A group of patches from Oleg Nesterov which clean up and slightly fix
our handling of reads from /proc/PID/task/... and which remove
task_struct.therad_group.
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Merge tag 'mm-nonmm-stable-2023-11-02-14-08' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull non-MM updates from Andrew Morton:
"As usual, lots of singleton and doubleton patches all over the tree
and there's little I can say which isn't in the individual changelogs.
The lengthier patch series are
- 'kdump: use generic functions to simplify crashkernel reservation
in arch', from Baoquan He. This is mainly cleanups and
consolidation of the 'crashkernel=' kernel parameter handling
- After much discussion, David Laight's 'minmax: Relax type checks in
min() and max()' is here. Hopefully reduces some typecasting and
the use of min_t() and max_t()
- A group of patches from Oleg Nesterov which clean up and slightly
fix our handling of reads from /proc/PID/task/... and which remove
task_struct.thread_group"
* tag 'mm-nonmm-stable-2023-11-02-14-08' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (64 commits)
scripts/gdb/vmalloc: disable on no-MMU
scripts/gdb: fix usage of MOD_TEXT not defined when CONFIG_MODULES=n
.mailmap: add address mapping for Tomeu Vizoso
mailmap: update email address for Claudiu Beznea
tools/testing/selftests/mm/run_vmtests.sh: lower the ptrace permissions
.mailmap: map Benjamin Poirier's address
scripts/gdb: add lx_current support for riscv
ocfs2: fix a spelling typo in comment
proc: test ProtectionKey in proc-empty-vm test
proc: fix proc-empty-vm test with vsyscall
fs/proc/base.c: remove unneeded semicolon
do_io_accounting: use sig->stats_lock
do_io_accounting: use __for_each_thread()
ocfs2: replace BUG_ON() at ocfs2_num_free_extents() with ocfs2_error()
ocfs2: fix a typo in a comment
scripts/show_delta: add __main__ judgement before main code
treewide: mark stuff as __ro_after_init
fs: ocfs2: check status values
proc: test /proc/${pid}/statm
compiler.h: move __is_constexpr() to compiler.h
...
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Linus Torvalds
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f0d25b5d0f |
x86 MM handling code changes for v6.7:
- Add new NX-stack self-test - Improve NUMA partial-CFMWS handling - Fix #VC handler bugs resulting in SEV-SNP boot failures - Drop the 4MB memory size restriction on minimal NUMA nodes - Reorganize headers a bit, in preparation to header dependency reduction efforts - Misc cleanups & fixes Signed-off-by: Ingo Molnar <mingo@kernel.org> -----BEGIN PGP SIGNATURE----- iQJFBAABCgAvFiEEBpT5eoXrXCwVQwEKEnMQ0APhK1gFAmU9Ek4RHG1pbmdvQGtl cm5lbC5vcmcACgkQEnMQ0APhK1gIJQ/+Mg6mzMaThyNXqhJszeZJBmDaBv2sqjAB 5tcferg1nJBdNBzX8bJ95UFt9fIqeYAcgH00qlQCYSmyzbC1TQTk9U2Pre1zbOw4 042ONK8sygKSje1zdYleHoBeqwnxD2VNM0NwBElhGjumwHRng/tbLiI9wx6qiz+C VsFXavkBszHGA1pjy9wZLGixYIH5jCygMpH134Wp+CIhpS+C4nftcGdIL1D5Oil1 6Tm2XeI6uyfiQhm9IOwDjfoYeC7gUjx1rp8rHseGUMJxyO/BX9q5j1ixbsVriqfW 97ucYuRL9mza7ic516C9v7OlAA3AGH2xWV+SYOGK88i9Co4kYzP4WnamxXqOsD8+ popxG55oa6QelhaouTBZvgERpZ4fWupSDs/UccsDaE9leMCerNEbGHEzt/Mm/2sw xopjMQ0y5Kn6/fS0dLv8U+XHu4ANkvXJkFd6Ny0h/WfgGefuQOOTG9ruYgfeqqB8 dViQ4R7CO8ySjD45KawAZl/EqL86x1M/CI1nlt0YY4vNwUuOJbebL7Jn8w3Fjxm5 FVfUlDmcPdhZfL9Vnrsi6MIou1cU1yJPw4D6sXJ4sg4s7A4ebBcRRrjayVQ4msjv Q7cvBOMnWEHhOV11pvP50FmQuj74XW3bUqiuWrnK1SypvnhHavF6kc1XYpBLs1xZ y8nueJW2qPw= =tT5F -----END PGP SIGNATURE----- Merge tag 'x86-mm-2023-10-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 mm handling updates from Ingo Molnar: - Add new NX-stack self-test - Improve NUMA partial-CFMWS handling - Fix #VC handler bugs resulting in SEV-SNP boot failures - Drop the 4MB memory size restriction on minimal NUMA nodes - Reorganize headers a bit, in preparation to header dependency reduction efforts - Misc cleanups & fixes * tag 'x86-mm-2023-10-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/mm: Drop the 4 MB restriction on minimal NUMA node memory size selftests/x86/lam: Zero out buffer for readlink() x86/sev: Drop unneeded #include x86/sev: Move sev_setup_arch() to mem_encrypt.c x86/tdx: Replace deprecated strncpy() with strtomem_pad() selftests/x86/mm: Add new test that userspace stack is in fact NX x86/sev: Make boot_ghcb_page[] static x86/boot: Move x86_cache_alignment initialization to correct spot x86/sev-es: Set x86_virt_bits to the correct value straight away, instead of a two-phase approach x86/sev-es: Allow copy_from_kernel_nofault() in earlier boot x86_64: Show CR4.PSE on auxiliaries like on BSP x86/iommu/docs: Update AMD IOMMU specification document URL x86/sev/docs: Update document URL in amd-memory-encryption.rst x86/mm: Move arch_memory_failure() and arch_is_platform_page() definitions from <asm/processor.h> to <asm/pgtable.h> ACPI/NUMA: Apply SRAT proximity domain to entire CFMWS window x86/numa: Introduce numa_fill_memblks() |
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Linus Torvalds
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f155f3b3ed |
- Make sure PCI function 4 IDs of AMD family 0x19, models 0x60-0x7f are
actually used in the amd_nb.c enumeration - Add support for extracting NUMA information from devicetree for Hyper-V usages - Add PCI device IDs for the new AMD MI300 AI accelerators - Annotate an array in struct uv_rtc_timer_head with the new __counted_by attribute - Rework UV's NMI action parameter handling -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEzv7L6UO9uDPlPSfHEsHwGGHeVUoFAmU78I4ACgkQEsHwGGHe VUoDFQ//a8KYzcj2wC+GA+tAScMCP4lT3hsSYoHvFE6Fd4HBngMUBcaEHY0InxWc jfXRHFZBS54sLMH2XPVOnozTBDLUEF+4cnApj9iVf//RwjSz/mnJ1P/fqwGQHmfY eyOKn38nzkdcf+MW69HAyOeOLxOhOcxEdrzJ4AuPijjTH0GfHWXtuZrqCgaRB6XZ yYw7PwO9azSBIYA3c87IPo5uGDa0Ht/BWWHv+XD21DjH0E2n2jaGPgExojBwpI1F zJZkx8xJWlQANSD9qiYWoYFdEluGAJ6Fyn989hMRVUqFLbGB9ppEu0BD5TWor08A UMX3LYIXM+706EnpOYKc5m5dajbUNOEUl73M6S6J67ugvRUWjCZpoejEx1Aejup7 aCcYrkbSiuVPFn8Wj9/JdkItu+zyzzsp3fjEdYlYVfefLh3EY4IrFAkQGUk7A0cA p6Idau8j4Cx+4lvNEFGMk/u7SAxcInJx7NDy8rJL9CG1BdbjzkwJH+GJFELuI/zM dSd+N2r5YUMClHR8Tor17PDh61i+ovg1kPhOyDyf7bNv0HQG0Hbcded4lyiVrsXa m5GNYRXEQFZXMeBxo6dJKDAj2rdSPsACC2FBTa9B+bciklcWid4FVTvf/9sSFeQv cvGFfGbFdW/uddAHsWqHMiuTfBsQneZ9UbZCKq/kAkHAtfdhRa8= =7JVZ -----END PGP SIGNATURE----- Merge tag 'x86_platform_for_6.7_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 platform updates from Borislav Petkov: - Make sure PCI function 4 IDs of AMD family 0x19, models 0x60-0x7f are actually used in the amd_nb.c enumeration - Add support for extracting NUMA information from devicetree for Hyper-V usages - Add PCI device IDs for the new AMD MI300 AI accelerators - Annotate an array in struct uv_rtc_timer_head with the new __counted_by attribute - Rework UV's NMI action parameter handling * tag 'x86_platform_for_6.7_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/amd_nb: Use Family 19h Models 60h-7Fh Function 4 IDs x86/numa: Add Devicetree support x86/of: Move the x86_flattree_get_config() call out of x86_dtb_init() x86/amd_nb: Add AMD Family MI300 PCI IDs x86/platform/uv: Annotate struct uv_rtc_timer_head with __counted_by x86/platform/uv: Rework NMI "action" modparam handling |
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Arnd Bergmann
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acfc788233 |
vgacon: remove screen_info dependency
The vga console driver is fairly self-contained, and only used by architectures that explicitly initialize the screen_info settings. Chance every instance that picks the vga console by setting conswitchp to call a function instead, and pass a reference to the screen_info there. Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Acked-by: Khalid Azzi <khalid@gonehiking.org> Acked-by: Helge Deller <deller@gmx.de> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Link: https://lore.kernel.org/r/20231009211845.3136536-6-arnd@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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Alexander Shishkin
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6e74b12515 |
x86/sev: Move sev_setup_arch() to mem_encrypt.c
Since commit:
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Baoquan He
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9c08a2a139 |
x86: kdump: use generic interface to simplify crashkernel reservation code
With the help of newly changed function parse_crashkernel() and generic reserve_crashkernel_generic(), crashkernel reservation can be simplified by steps: 1) Add a new header file <asm/crash_core.h>, and define CRASH_ALIGN, CRASH_ADDR_LOW_MAX, CRASH_ADDR_HIGH_MAX and DEFAULT_CRASH_KERNEL_LOW_SIZE in <asm/crash_core.h>; 2) Add arch_reserve_crashkernel() to call parse_crashkernel() and reserve_crashkernel_generic(), and do the ARCH specific work if needed. 3) Add ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATION Kconfig in arch/x86/Kconfig. When adding DEFAULT_CRASH_KERNEL_LOW_SIZE, add crash_low_size_default() to calculate crashkernel low memory because x86_64 has special requirement. The old reserve_crashkernel_low() and reserve_crashkernel() can be removed. [bhe@redhat.com: move crash_low_size_default() code into <asm/crash_core.h>] Link: https://lkml.kernel.org/r/ZQpeAjOmuMJBFw1/@MiWiFi-R3L-srv Link: https://lkml.kernel.org/r/20230914033142.676708-7-bhe@redhat.com Signed-off-by: Baoquan He <bhe@redhat.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Chen Jiahao <chenjiahao16@huawei.com> Cc: Zhen Lei <thunder.leizhen@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
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Baoquan He
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a9e1a3d84e |
crash_core: change the prototype of function parse_crashkernel()
Add two parameters 'low_size' and 'high' to function parse_crashkernel(), later crashkernel=,high|low parsing will be added. Make adjustments in all call sites of parse_crashkernel() in arch. Link: https://lkml.kernel.org/r/20230914033142.676708-3-bhe@redhat.com Signed-off-by: Baoquan He <bhe@redhat.com> Reviewed-by: Zhen Lei <thunder.leizhen@huawei.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Chen Jiahao <chenjiahao16@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
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Saurabh Sengar
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0d294c8c4e |
x86/of: Move the x86_flattree_get_config() call out of x86_dtb_init()
Fetching the device tree configuration before initmem_init() is necessary to allow the parsing of NUMA node information. However moving the entire x86_dtb_init() call before initmem_init() is not correct as APIC/IO-APIC enumeration has to be after initmem_init(). Thus, move the x86_flattree_get_config() call out of x86_dtb_init(), into setup_arch(), to call it before initmem_init(), and leave the ACPI/IOAPIC registration sequence as-is. [ mingo: Updated the changelog for clarity. ] Signed-off-by: Saurabh Sengar <ssengar@linux.microsoft.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Link: https://lore.kernel.org/r/1692949657-16446-1-git-send-email-ssengar@linux.microsoft.com |
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Rik van Riel
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34cf99c250 |
x86/mm, kexec, ima: Use memblock_free_late() from ima_free_kexec_buffer()
The code calling ima_free_kexec_buffer() runs long after the memblock
allocator has already been torn down, potentially resulting in a use
after free in memblock_isolate_range().
With KASAN or KFENCE, this use after free will result in a BUG
from the idle task, and a subsequent kernel panic.
Switch ima_free_kexec_buffer() over to memblock_free_late() to avoid
that bug.
Fixes:
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Thomas Gleixner
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bef4f379e9 |
x86/apic: Provide apic_update_callback()
There are already two variants of update mechanism for particular callbacks and virtualization just writes into the data structure. Provide an interface and use a shadow data structure to preserve callbacks so they can be reapplied when the APIC driver is replaced. The extra data structure is intentional as any new callback needs to be also updated in the core code. This also prepares for static calls. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Michael Kelley <mikelley@microsoft.com> Tested-by: Sohil Mehta <sohil.mehta@intel.com> Tested-by: Juergen Gross <jgross@suse.com> # Xen PV (dom0 and unpriv. guest) |
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Thomas Gleixner
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9d87f5b67e |
x86/apic: Mop up *setup_apic_routing()
default_setup_apic_routing() is a complete misnomer. On 64bit it does the actual APIC probing and on 32bit it is used to force select the bigsmp APIC and to emit a redundant message in the apic::setup_apic_routing() callback. Rename the 64bit and 32bit function so they reflect what they are doing and remove the useless APIC callback. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Michael Kelley <mikelley@microsoft.com> Tested-by: Sohil Mehta <sohil.mehta@intel.com> Tested-by: Juergen Gross <jgross@suse.com> # Xen PV (dom0 and unpriv. guest) |
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Thomas Gleixner
|
79c9a17c16 |
x86/apic/32: Decrapify the def_bigsmp mechanism
If the system has more than 8 CPUs then XAPIC and the bigsmp APIC driver is
required. This is ensured via:
1) Enumerating all possible CPUs up to NR_CPUS
2) Checking at boot CPU APIC setup time whether the system has more than
8 CPUs and has an XAPIC.
If that's the case then it's attempted to install the bigsmp APIC
driver and a magic variable 'def_to_bigsmp' is set to one.
3) If that magic variable is set and CONFIG_X86_BIGSMP=n and the system
has more than 8 CPUs smp_sanity_check() removes all CPUs >= #8 from
the present and possible mask in the most convoluted way.
This logic is completely broken for the case where the bigsmp driver is
enabled, but not selected due to a command line option specifying the
default APIC. In that case the system boots with default APIC in logical
destination mode and fails to reduce the number of CPUs.
That aside the above which is sprinkled over 3 different places is yet
another piece of art.
It would have been too obvious to check the requirements upfront and limit
nr_cpu_ids _before_ enumerating tons of CPUs and then removing them again.
Implement exactly this. Check the bigsmp requirement when the boot APIC is
registered which happens _before_ ACPI/MPTABLE parsing and limit the number
of CPUs to 8 if it can't be used. Switch it over when the boot CPU apic is
set up if necessary.
[ dhansen: fix nr_cpu_ids off-by-one in default_setup_apic_routing() ]
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Sohil Mehta <sohil.mehta@intel.com>
Tested-by: Juergen Gross <jgross@suse.com> # Xen PV (dom0 and unpriv. guest)
|
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Thomas Gleixner
|
49062454a3 |
x86/apic: Rename disable_apic
It reflects a state and not a command. Make it bool while at it. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Michael Kelley <mikelley@microsoft.com> Tested-by: Sohil Mehta <sohil.mehta@intel.com> Tested-by: Juergen Gross <jgross@suse.com> # Xen PV (dom0 and unpriv. guest) |
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Linus Torvalds
|
18eb3b6dff |
xen: branch for v6.5-rc1
-----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQRTLbB6QfY48x44uB6AXGG7T9hjvgUCZJp4CgAKCRCAXGG7T9hj vmmpAP4gMe7T2QXWY9VvWgyf97z3AtBx2NdTzLAmArFySzPFtgEAgCHE3yy95bmR JAX4+q/2QPbFxp0TgJrrxlq5RDn5Ago= =2HjA -----END PGP SIGNATURE----- Merge tag 'for-linus-6.5-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip Pull xen updates from Juergen Gross: - three patches adding missing prototypes - a fix for finding the iBFT in a Xen dom0 for supporting diskless iSCSI boot * tag 'for-linus-6.5-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: x86: xen: add missing prototypes x86/xen: add prototypes for paravirt mmu functions iscsi_ibft: Fix finding the iBFT under Xen Dom 0 xen: xen_debug_interrupt prototype to global header |
|
Ross Lagerwall
|
9338c2233b |
iscsi_ibft: Fix finding the iBFT under Xen Dom 0
To facilitate diskless iSCSI boot, the firmware can place a table of configuration details in memory called the iBFT. The presence of this table is not specified, nor is the precise location (and it's not in the E820) so the kernel has to search for a magic marker to find it. When running under Xen, Dom 0 does not have access to the entire host's memory, only certain regions which are identity-mapped which means that the pseudo-physical address in Dom0 == real host physical address. Add the iBFT search bounds as a reserved region which causes it to be identity-mapped in xen_set_identity_and_remap_chunk() which allows Dom0 access to the specific physical memory to correctly search for the iBFT magic marker (and later access the full table). This necessitates moving the call to reserve_ibft_region() somewhat later so that it is called after e820__memory_setup() which is when the Xen identity mapping adjustments are applied. The precise location of the call is not too important so I've put it alongside dmi_setup() which does similar scanning of memory for configuration tables. Finally in the iBFT find code, instead of using isa_bus_to_virt() which doesn't do the right thing under Xen, use early_memremap() like the dmi_setup() code does. The result of these changes is that it is possible to boot a diskless Xen + Dom0 running off an iSCSI disk whereas previously it would fail to find the iBFT and consequently, the iSCSI root disk. Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com> Reviewed-by: Juergen Gross <jgross@suse.com> Acked-by: Konrad Rzeszutek Wilk <konrad@darnok.org> Acked-by: Dave Hansen <dave.hansen@linux.intel.com> # for x86 Link: https://lore.kernel.org/r/20230605102840.1521549-1-ross.lagerwall@citrix.com Signed-off-by: Juergen Gross <jgross@suse.com> |
|
Juergen Gross
|
29055dc742 |
x86/mtrr: Support setting MTRR state for software defined MTRRs
When running virtualized, MTRR access can be reduced (e.g. in Xen PV guests or when running as a SEV-SNP guest under Hyper-V). Typically, the hypervisor will not advertize the MTRR feature in CPUID data, resulting in no MTRR memory type information being available for the kernel. This has turned out to result in problems (Link tags below): - Hyper-V SEV-SNP guests using uncached mappings where they shouldn't - Xen PV dom0 mapping memory as WB which should be UC- instead Solve those problems by allowing an MTRR static state override, overwriting the empty state used today. In case such a state has been set, don't call get_mtrr_state() in mtrr_bp_init(). The set state will only be used by mtrr_type_lookup(), as in all other cases mtrr_enabled() is being checked, which will return false. Accept the overwrite call only for selected cases when running as a guest. Disable X86_FEATURE_MTRR in order to avoid any MTRR modifications by just refusing them. [ bp: Massage. ] Signed-off-by: Juergen Gross <jgross@suse.com> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Tested-by: Michael Kelley <mikelley@microsoft.com> Link: https://lore.kernel.org/all/4fe9541e-4d4c-2b2a-f8c8-2d34a7284930@nerdbynature.de/ Link: https://lore.kernel.org/lkml/BYAPR21MB16883ABC186566BD4D2A1451D7FE9@BYAPR21MB1688.namprd21.prod.outlook.com Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> |
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Yuntao Wang
|
50c66d7b04 |
x86/setup: Move duplicate boot_cpu_data definition out of the ifdeffery
Both the if and else blocks define an exact same boot_cpu_data variable, move the duplicate variable definition out of the if/else block. In addition, do some other minor cleanups. [ bp: Massage. ] Signed-off-by: Yuntao Wang <ytcoode@gmail.com> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Link: https://lore.kernel.org/r/20220601122914.820890-1-ytcoode@gmail.com |
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Linus Torvalds
|
3ef3ace4e2 |
- Split MTRR and PAT init code to accomodate at least Xen PV and TDX
guests which do not get MTRRs exposed but only PAT. (TDX guests do not support the cache disabling dance when setting up MTRRs so they fall under the same category.) This is a cleanup work to remove all the ugly workarounds for such guests and init things separately (Juergen Gross) - Add two new Intel CPUs to the list of CPUs with "normal" Energy Performance Bias, leading to power savings - Do not do bus master arbitration in C3 (ARB_DISABLE) on modern Centaur CPUs -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEzv7L6UO9uDPlPSfHEsHwGGHeVUoFAmOYhIMACgkQEsHwGGHe VUpxug//ZKw3hYFroKhsULJi/e0j2nGARiSlJrJcFHl2vgh9yGvDsnYUyM/rgjgt cM3uCLbEG7nA6uhB3nupzaXZ8lBM1nU9kiEl/kjQ5oYf9nmJ48fLttvWGfxYN4s3 kj5fYVhlOZpntQXIWrwxnPqghUysumMnZmBJeKYiYNNfkj62l3xU2Ni4Gnjnp02I 9MmUhl7pj1aEyOQfM8rovy+wtYCg5WTOmXVlyVN+b9MwfYeK+stojvCZHxtJs9BD fezpJjjG+78xKUC7vVZXCh1p1N5Qvj014XJkVl9Hg0n7qizKFZRtqi8I769G2ptd exP8c2nDXKCqYzE8vK6ukWgDANQPs3d6Z7EqUKuXOCBF81PnMPSUMyNtQFGNM6Wp S5YSvFfCgUjp50IunOpvkDABgpM+PB8qeWUq72UFQJSOymzRJg/KXtE2X+qaMwtC 0i6VLXfMddGcmqNKDppfGtCjq2W5VrNIIJedtAQQGyl+pl3XzZeNomhJpm/0mVfJ 8UrlXZeXl/EUQ7qk40gC/Ash27pU9ZDx4CMNMy1jDIQqgufBjEoRIDSFqQlghmZq An5/BqMLhOMxUYNA7bRUnyeyxCBypetMdQt5ikBmVXebvBDmArXcuSNAdiy1uBFX KD8P3Y1AnsHIklxkLNyZRUy7fb4mgMFenUbgc0vmbYHbFl0C0pQ= =Zmgh -----END PGP SIGNATURE----- Merge tag 'x86_cpu_for_v6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 cpu updates from Borislav Petkov: - Split MTRR and PAT init code to accomodate at least Xen PV and TDX guests which do not get MTRRs exposed but only PAT. (TDX guests do not support the cache disabling dance when setting up MTRRs so they fall under the same category) This is a cleanup work to remove all the ugly workarounds for such guests and init things separately (Juergen Gross) - Add two new Intel CPUs to the list of CPUs with "normal" Energy Performance Bias, leading to power savings - Do not do bus master arbitration in C3 (ARB_DISABLE) on modern Centaur CPUs * tag 'x86_cpu_for_v6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (26 commits) x86/mtrr: Make message for disabled MTRRs more descriptive x86/pat: Handle TDX guest PAT initialization x86/cpuid: Carve out all CPUID functionality x86/cpu: Switch to cpu_feature_enabled() for X86_FEATURE_XENPV x86/cpu: Remove X86_FEATURE_XENPV usage in setup_cpu_entry_area() x86/cpu: Drop 32-bit Xen PV guest code in update_task_stack() x86/cpu: Remove unneeded 64-bit dependency in arch_enter_from_user_mode() x86/cpufeatures: Add X86_FEATURE_XENPV to disabled-features.h x86/acpi/cstate: Optimize ARB_DISABLE on Centaur CPUs x86/mtrr: Simplify mtrr_ops initialization x86/cacheinfo: Switch cache_ap_init() to hotplug callback x86: Decouple PAT and MTRR handling x86/mtrr: Add a stop_machine() handler calling only cache_cpu_init() x86/mtrr: Let cache_aps_delayed_init replace mtrr_aps_delayed_init x86/mtrr: Get rid of __mtrr_enabled bool x86/mtrr: Simplify mtrr_bp_init() x86/mtrr: Remove set_all callback from struct mtrr_ops x86/mtrr: Disentangle MTRR init from PAT init x86/mtrr: Move cache control code to cacheinfo.c x86/mtrr: Split MTRR-specific handling from cache dis/enabling ... |
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Linus Torvalds
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4eb77fa102 |
- Do some spring cleaning to the compressed boot code by moving the
EFI mixed-mode code to a separate compilation unit, the AMD memory
encryption early code where it belongs and fixing up build dependencies.
Make the deprecated EFI handover protocol optional with the goal of
removing it at some point (Ard Biesheuvel)
- Skip realmode init code on Xen PV guests as it is not needed there
- Remove an old 32-bit PIC code compiler workaround
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Merge tag 'x86_boot_for_v6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 boot updates from Borislav Petkov:
"A of early boot cleanups and fixes.
- Do some spring cleaning to the compressed boot code by moving the
EFI mixed-mode code to a separate compilation unit, the AMD memory
encryption early code where it belongs and fixing up build
dependencies. Make the deprecated EFI handover protocol optional
with the goal of removing it at some point (Ard Biesheuvel)
- Skip realmode init code on Xen PV guests as it is not needed there
- Remove an old 32-bit PIC code compiler workaround"
* tag 'x86_boot_for_v6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/boot: Remove x86_32 PIC using %ebx workaround
x86/boot: Skip realmode init code when running as Xen PV guest
x86/efi: Make the deprecated EFI handover protocol optional
x86/boot/compressed: Only build mem_encrypt.S if AMD_MEM_ENCRYPT=y
x86/boot/compressed: Adhere to calling convention in get_sev_encryption_bit()
x86/boot/compressed: Move startup32_check_sev_cbit() out of head_64.S
x86/boot/compressed: Move startup32_check_sev_cbit() into .text
x86/boot/compressed: Move startup32_load_idt() out of head_64.S
x86/boot/compressed: Move startup32_load_idt() into .text section
x86/boot/compressed: Pull global variable reference into startup32_load_idt()
x86/boot/compressed: Avoid touching ECX in startup32_set_idt_entry()
x86/boot/compressed: Simplify IDT/GDT preserve/restore in the EFI thunk
x86/boot/compressed, efi: Merge multiple definitions of image_offset into one
x86/boot/compressed: Move efi32_pe_entry() out of head_64.S
x86/boot/compressed: Move efi32_entry out of head_64.S
x86/boot/compressed: Move efi32_pe_entry into .text section
x86/boot/compressed: Move bootargs parsing out of 32-bit startup code
x86/boot/compressed: Move 32-bit entrypoint code into .text section
x86/boot/compressed: Rename efi_thunk_64.S to efi-mixed.S
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Juergen Gross
|
f1e5250094 |
x86/boot: Skip realmode init code when running as Xen PV guest
When running as a Xen PV guest there is no need for setting up the
realmode trampoline, as realmode isn't supported in this environment.
Trying to setup the trampoline has been proven to be problematic in
some cases, especially when trying to debug early boot problems with
Xen requiring to keep the EFI boot-services memory mapped (some
firmware variants seem to claim basically all memory below 1Mb for boot
services).
Introduce new x86_platform_ops operations for that purpose, which can
be set to a NOP by the Xen PV specific kernel boot code.
[ bp: s/call_init_real_mode/do_init_real_mode/ ]
Fixes:
|
|
Ard Biesheuvel
|
4059ba656c |
efi: memmap: Move EFI fake memmap support into x86 arch tree
The EFI fake memmap support is specific to x86, which manipulates the EFI memory map in various different ways after receiving it from the EFI stub. On other architectures, we have managed to push back on this, and the EFI memory map is kept pristine. So let's move the fake memmap code into the x86 arch tree, where it arguably belongs. Signed-off-by: Ard Biesheuvel <ardb@kernel.org> |
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Juergen Gross
|
adfe7512e1 |
x86: Decouple PAT and MTRR handling
Today, PAT is usable only with MTRR being active, with some nasty tweaks to make PAT usable when running as a Xen PV guest which doesn't support MTRR. The reason for this coupling is that both PAT MSR changes and MTRR changes require a similar sequence and so full PAT support was added using the already available MTRR handling. Xen PV PAT handling can work without MTRR, as it just needs to consume the PAT MSR setting done by the hypervisor without the ability and need to change it. This in turn has resulted in a convoluted initialization sequence and wrong decisions regarding cache mode availability due to misguiding PAT availability flags. Fix all of that by allowing to use PAT without MTRR and by reworking the current PAT initialization sequence to match better with the newly introduced generic cache initialization. This removes the need of the recently added pat_force_disabled flag, so remove the remnants of the patch adding it. Signed-off-by: Juergen Gross <jgross@suse.com> Signed-off-by: Borislav Petkov <bp@suse.de> Link: https://lore.kernel.org/r/20221102074713.21493-14-jgross@suse.com Signed-off-by: Borislav Petkov <bp@suse.de> |
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Juergen Gross
|
0b9a6a8bed |
x86/mtrr: Add a stop_machine() handler calling only cache_cpu_init()
Instead of having a stop_machine() handler for either a specific MTRR register or all state at once, add a handler just for calling cache_cpu_init() if appropriate. Add functions for calling stop_machine() with this handler as well. Add a generic replacement for mtrr_bp_restore() and a wrapper for mtrr_bp_init(). Signed-off-by: Juergen Gross <jgross@suse.com> Signed-off-by: Borislav Petkov <bp@suse.de> Link: https://lore.kernel.org/r/20221102074713.21493-13-jgross@suse.com Signed-off-by: Borislav Petkov <bp@suse.de> |
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Jason A. Donenfeld
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68b8e9713c |
x86/setup: Use rng seeds from setup_data
Currently, the only way x86 can get an early boot RNG seed is via EFI,
which is generally always used now for physical machines, but is very
rarely used in VMs, especially VMs that are optimized for starting
"instantaneously", such as Firecracker's MicroVM. For tiny fast booting
VMs, EFI is not something you generally need or want.
Rather, the image loader or firmware should be able to pass a single
random seed, exactly as device tree platforms do with the "rng-seed"
property. Additionally, this is something that bootloaders can append,
with their own seed file management, which is something every other
major OS ecosystem has that Linux does not (yet).
Add SETUP_RNG_SEED, similar to the other eight setup_data entries that
are parsed at boot. It also takes care to zero out the seed immediately
after using, in order to retain forward secrecy. This all takes about 7
trivial lines of code.
Then, on kexec_file_load(), a new fresh seed is generated and passed to
the next kernel, just as is done on device tree architectures when
using kexec. And, importantly, I've tested that QEMU is able to properly
pass SETUP_RNG_SEED as well, making this work for every step of the way.
This code too is pretty straight forward.
Together these measures ensure that VMs and nested kexec()'d kernels
always receive a proper boot time RNG seed at the earliest possible
stage from their parents:
- Host [already has strongly initialized RNG]
- QEMU [passes fresh seed in SETUP_RNG_SEED field]
- Linux [uses parent's seed and gathers entropy of its own]
- kexec [passes this in SETUP_RNG_SEED field]
- Linux [uses parent's seed and gathers entropy of its own]
- kexec [passes this in SETUP_RNG_SEED field]
- Linux [uses parent's seed and gathers entropy of its own]
- kexec [passes this in SETUP_RNG_SEED field]
- ...
I've verified in several scenarios that this works quite well from a
host kernel to QEMU and down inwards, mixing and matching loaders, with
every layer providing a seed to the next.
[ bp: Massage commit message. ]
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: H. Peter Anvin (Intel) <hpa@zytor.com>
Link: https://lore.kernel.org/r/20220630113300.1892799-1-Jason@zx2c4.com
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Jonathan McDowell
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b69a2afd5a |
x86/kexec: Carry forward IMA measurement log on kexec
On kexec file load, the Integrity Measurement Architecture (IMA) subsystem may verify the IMA signature of the kernel and initramfs, and measure it. The command line parameters passed to the kernel in the kexec call may also be measured by IMA. A remote attestation service can verify a TPM quote based on the TPM event log, the IMA measurement list and the TPM PCR data. This can be achieved only if the IMA measurement log is carried over from the current kernel to the next kernel across the kexec call. PowerPC and ARM64 both achieve this using device tree with a "linux,ima-kexec-buffer" node. x86 platforms generally don't make use of device tree, so use the setup_data mechanism to pass the IMA buffer to the new kernel. Signed-off-by: Jonathan McDowell <noodles@fb.com> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Mimi Zohar <zohar@linux.ibm.com> # IMA function definitions Link: https://lore.kernel.org/r/YmKyvlF3my1yWTvK@noodles-fedora-PC23Y6EG |
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Josh Poimboeuf
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e32683c6f7 |
x86/mm: Fix RESERVE_BRK() for older binutils
With binutils 2.26, RESERVE_BRK() causes a build failure:
/tmp/ccnGOKZ5.s: Assembler messages:
/tmp/ccnGOKZ5.s:98: Error: missing ')'
/tmp/ccnGOKZ5.s:98: Error: missing ')'
/tmp/ccnGOKZ5.s:98: Error: missing ')'
/tmp/ccnGOKZ5.s:98: Error: junk at end of line, first unrecognized
character is `U'
The problem is this line:
RESERVE_BRK(early_pgt_alloc, INIT_PGT_BUF_SIZE)
Specifically, the INIT_PGT_BUF_SIZE macro which (via PAGE_SIZE's use
_AC()) has a "1UL", which makes older versions of the assembler unhappy.
Unfortunately the _AC() macro doesn't work for inline asm.
Inline asm was only needed here to convince the toolchain to add the
STT_NOBITS flag. However, if a C variable is placed in a section whose
name is prefixed with ".bss", GCC and Clang automatically set
STT_NOBITS. In fact, ".bss..page_aligned" already relies on this trick.
So fix the build failure (and simplify the macro) by allocating the
variable in C.
Also, add NOLOAD to the ".brk" output section clause in the linker
script. This is a failsafe in case the ".bss" prefix magic trick ever
stops working somehow. If there's a section type mismatch, the GNU
linker will force the ".brk" output section to be STT_NOBITS. The LLVM
linker will fail with a "section type mismatch" error.
Note this also changes the name of the variable from .brk.##name to
__brk_##name. The variable names aren't actually used anywhere, so it's
harmless.
Fixes:
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XueBing Chen
|
8a33d96bd1 |
x86/setup: Use strscpy() to replace deprecated strlcpy()
strlcpy() is marked deprecated and should not be used, because it doesn't limit the source length. The preferred interface for when strlcpy()'s return value is not checked (truncation) is strscpy(). [ mingo: Tweaked the changelog ] Signed-off-by: XueBing Chen <chenxuebing@jari.cn> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lore.kernel.org/r/730f0fef.a33.180fa69880f.Coremail.chenxuebing@jari.cn |
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Borislav Petkov
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76ea0025a2 |
x86/cpu: Remove "noexec"
It doesn't make any sense to disable non-executable mappings - security-wise or else. So rip out that switch and move the remaining code into setup.c and delete setup_nx.c Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Lai Jiangshan <jiangshanlai@gmail.com> Reviewed-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20220127115626.14179-6-bp@alien8.de |
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Jisheng Zhang
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4ece09be99 |
x86/setup: use IS_ENABLED(CONFIG_KEXEC_CORE) instead of #ifdef
Replace the conditional compilation using "#ifdef CONFIG_KEXEC_CORE" by a check for "IS_ENABLED(CONFIG_KEXEC_CORE)", to simplify the code and increase compile coverage. Link: https://lkml.kernel.org/r/20211206160514.2000-4-jszhang@kernel.org Signed-off-by: Jisheng Zhang <jszhang@kernel.org> Acked-by: Baoquan He <bhe@redhat.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Alexandre Ghiti <alex@ghiti.fr> Cc: Borislav Petkov <bp@alien8.de> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Palmer Dabbelt <palmer@rivosinc.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Russell King <linux@armlinux.org.uk> Cc: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Ross Philipson
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7228918b34 |
x86/boot: Fix memremap of setup_indirect structures
As documented, the setup_indirect structure is nested inside
the setup_data structures in the setup_data list. The code currently
accesses the fields inside the setup_indirect structure but only
the sizeof(struct setup_data) is being memremapped. No crash
occurred but this is just due to how the area is remapped under the
covers.
Properly memremap both the setup_data and setup_indirect structures
in these cases before accessing them.
Fixes:
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Linus Torvalds
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2e97a0c02b |
- Add support for decoding instructions which do MMIO accesses in order
to use it in SEV and TDX guests
- An include fix and reorg to allow for removing set_fs in UML later
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Merge tag 'x86_misc_for_v5.17_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull misc x86 updates from Borislav Petkov:
"The pile which we cannot find the proper topic for so we stick it in
x86/misc:
- Add support for decoding instructions which do MMIO accesses in
order to use it in SEV and TDX guests
- An include fix and reorg to allow for removing set_fs in UML later"
* tag 'x86_misc_for_v5.17_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/mtrr: Remove the mtrr_bp_init() stub
x86/sev-es: Use insn_decode_mmio() for MMIO implementation
x86/insn-eval: Introduce insn_decode_mmio()
x86/insn-eval: Introduce insn_get_modrm_reg_ptr()
x86/insn-eval: Handle insn_get_opcode() failure
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Christoph Hellwig
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4d5cff69fb |
x86/mtrr: Remove the mtrr_bp_init() stub
Add an IS_ENABLED() check in setup_arch() and call pat_disable() directly if MTRRs are not supported. This allows to remove the <asm/memtype.h> include in <asm/mtrr.h>, which pull in lowlevel x86 headers that should not be included for UML builds and will cause build warnings with a following patch. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Borislav Petkov <bp@suse.de> Link: https://lore.kernel.org/r/20211215165612.554426-2-hch@lst.de |
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Mike Rapoport
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2f5b3514c3 |
x86/boot: Move EFI range reservation after cmdline parsing
The memory reservation in arch/x86/platform/efi/efi.c depends on at
least two command line parameters. Put it back later in the boot process
and move efi_memblock_x86_reserve_range() out of early_memory_reserve().
An attempt to fix this was done in
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Borislav Petkov
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fbe6183998 |
Revert "x86/boot: Pull up cmdline preparation and early param parsing"
This reverts commit
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Borislav Petkov
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58e138d624 |
Revert "x86/boot: Mark prepare_command_line() __init"
This reverts commit
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Borislav Petkov
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c0f2077baa |
x86/boot: Mark prepare_command_line() __init
Fix: WARNING: modpost: vmlinux.o(.text.unlikely+0x64d0): Section mismatch in reference \ from the function prepare_command_line() to the variable .init.data:command_line The function prepare_command_line() references the variable __initdata command_line. This is often because prepare_command_line lacks a __initdata annotation or the annotation of command_line is wrong. Apparently some toolchains do different inlining decisions. Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Borislav Petkov <bp@suse.de> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/YZySgpmBcNNM2qca@zn.tnic |