linux/arch/s390/lib
Linus Torvalds f90f2145b2 s390 updates for 6.15 merge window
- Add sorting of mcount locations at build time
 
 - Rework uaccess functions with C exception handling to shorten inline
   assembly size and enable full inlining. This yields near-optimal code
   for small constant copies with a ~40kb kernel size increase
 
 - Add support for a configurable STRICT_MM_TYPECHECKS which allows to
   generate better code, but also allows to have type checking for
   debug builds
 
 - Optimize get_lowcore() for common callers with alternatives that
   nearly revert to the pre-relocated lowcore code, while also slightly
   reducing syscall entry and exit time
 
 - Convert MACHINE_HAS_* checks for single facility tests into cpu_has_*
   style macros that call test_facility(), and for features with additional
   conditions, add a new ALT_TYPE_FEATURE alternative to provide a static
   branch via alternative patching. Also, move machine feature detection
   to the decompressor for early patching and add debugging functionality
   to easily show which alternatives are patched
 
 - Add exception table support to early boot / startup code to get rid
   of the open coded exception handling
 
 - Use asm_inline for all inline assemblies with EX_TABLE or ALTERNATIVE
   to ensure correct inlining and unrolling decisions
 
 - Remove 2k page table leftovers now that s390 has been switched to
   always allocate 4k page tables
 
 - Split kfence pool into 4k mappings in arch_kfence_init_pool() and
   remove the architecture-specific kfence_split_mapping()
 
 - Use READ_ONCE_NOCHECK() in regs_get_kernel_stack_nth() to silence
   spurious KASAN warnings from opportunistic ftrace argument tracing
 
 - Force __atomic_add_const() variants on s390 to always return void,
   ensuring compile errors for improper usage
 
 - Remove s390's ioremap_wt() and pgprot_writethrough() due to mismatched
   semantics and lack of known users, relying on asm-generic fallbacks
 
 - Signal eventfd in vfio-ap to notify userspace when the guest AP
   configuration changes, including during mdev removal
 
 - Convert mdev_types from an array to a pointer in vfio-ccw and vfio-ap
   drivers to avoid fake flex array confusion
 
 - Cleanup trap code
 
 - Remove references to the outdated linux390@de.ibm.com address
 
 - Other various small fixes and improvements all over the code
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Merge tag 's390-6.15-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 updates from Vasily Gorbik:

 - Add sorting of mcount locations at build time

 - Rework uaccess functions with C exception handling to shorten inline
   assembly size and enable full inlining. This yields near-optimal code
   for small constant copies with a ~40kb kernel size increase

 - Add support for a configurable STRICT_MM_TYPECHECKS which allows to
   generate better code, but also allows to have type checking for debug
   builds

 - Optimize get_lowcore() for common callers with alternatives that
   nearly revert to the pre-relocated lowcore code, while also slightly
   reducing syscall entry and exit time

 - Convert MACHINE_HAS_* checks for single facility tests into cpu_has_*
   style macros that call test_facility(), and for features with
   additional conditions, add a new ALT_TYPE_FEATURE alternative to
   provide a static branch via alternative patching. Also, move machine
   feature detection to the decompressor for early patching and add
   debugging functionality to easily show which alternatives are patched

 - Add exception table support to early boot / startup code to get rid
   of the open coded exception handling

 - Use asm_inline for all inline assemblies with EX_TABLE or ALTERNATIVE
   to ensure correct inlining and unrolling decisions

 - Remove 2k page table leftovers now that s390 has been switched to
   always allocate 4k page tables

 - Split kfence pool into 4k mappings in arch_kfence_init_pool() and
   remove the architecture-specific kfence_split_mapping()

 - Use READ_ONCE_NOCHECK() in regs_get_kernel_stack_nth() to silence
   spurious KASAN warnings from opportunistic ftrace argument tracing

 - Force __atomic_add_const() variants on s390 to always return void,
   ensuring compile errors for improper usage

 - Remove s390's ioremap_wt() and pgprot_writethrough() due to
   mismatched semantics and lack of known users, relying on asm-generic
   fallbacks

 - Signal eventfd in vfio-ap to notify userspace when the guest AP
   configuration changes, including during mdev removal

 - Convert mdev_types from an array to a pointer in vfio-ccw and vfio-ap
   drivers to avoid fake flex array confusion

 - Cleanup trap code

 - Remove references to the outdated linux390@de.ibm.com address

 - Other various small fixes and improvements all over the code

* tag 's390-6.15-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (78 commits)
  s390: Use inline qualifier for all EX_TABLE and ALTERNATIVE inline assemblies
  s390/kfence: Split kfence pool into 4k mappings in arch_kfence_init_pool()
  s390/ptrace: Avoid KASAN false positives in regs_get_kernel_stack_nth()
  s390/boot: Ignore vmlinux.map
  s390/sysctl: Remove "vm/allocate_pgste" sysctl
  s390: Remove 2k vs 4k page table leftovers
  s390/tlb: Use mm_has_pgste() instead of mm_alloc_pgste()
  s390/lowcore: Use lghi instead llilh to clear register
  s390/syscall: Merge __do_syscall() and do_syscall()
  s390/spinlock: Implement SPINLOCK_LOCKVAL with inline assembly
  s390/smp: Implement raw_smp_processor_id() with inline assembly
  s390/current: Implement current with inline assembly
  s390/lowcore: Use inline qualifier for get_lowcore() inline assembly
  s390: Move s390 sysctls into their own file under arch/s390
  s390/syscall: Simplify syscall_get_arguments()
  s390/vfio-ap: Notify userspace that guest's AP config changed when mdev removed
  s390: Remove ioremap_wt() and pgprot_writethrough()
  s390/mm: Add configurable STRICT_MM_TYPECHECKS
  s390/mm: Convert pgste_val() into function
  s390/mm: Convert pgprot_val() into function
  ...
2025-03-29 11:59:43 -07:00
..
Makefile s390/crc32: expose CRC32 functions through lib 2024-12-01 17:23:01 -08:00
crc32-glue.c lib/crc32: remove "_le" from crc32c base and arch functions 2025-02-08 20:06:30 -08:00
crc32-vx.h s390/crc32: expose CRC32 functions through lib 2024-12-01 17:23:01 -08:00
crc32be-vx.c s390/crc32: expose CRC32 functions through lib 2024-12-01 17:23:01 -08:00
crc32le-vx.c s390/crc32: expose CRC32 functions through lib 2024-12-01 17:23:01 -08:00
csum-partial.c s390/checksum: provide csum_partial_copy_nocheck() 2024-02-16 14:30:17 +01:00
delay.c s390/delay: sync comment within __delay() with reality 2022-08-30 22:00:33 +02:00
error-inject.c
expoline.S s390/expoline: Make modules use kernel expolines 2024-04-17 13:38:03 +02:00
find.c
mem.S s390/lib: Use exrl instead of ex in string functions 2024-12-17 12:46:13 +01:00
probes.c
spinlock.c s390/spinlock: Implement SPINLOCK_LOCKVAL with inline assembly 2025-03-18 17:13:04 +01:00
string.c s390/string: Convert to use flag output macros 2024-11-13 14:31:33 +01:00
test_kprobes.c s390/lib: Add missing MODULE_DESCRIPTION() macros 2024-06-28 14:52:30 +02:00
test_kprobes.h kprobes: add testcases for s390 2021-10-04 09:49:37 +02:00
test_kprobes_asm.S kprobes: add testcases for s390 2021-10-04 09:49:37 +02:00
test_modules.c s390/lib: Add missing MODULE_DESCRIPTION() macros 2024-06-28 14:52:30 +02:00
test_modules.h s390/module: fix building test_modules_helpers.o with clang 2022-02-06 23:30:37 +01:00
test_modules_helpers.c s390/module: test loading modules with a lot of relocations 2022-01-24 09:10:59 +01:00
test_unwind.c ftrace: Make ftrace_regs abstract from direct use 2024-10-10 20:18:01 -04:00
tishift.S s390: replace #include <asm/export.h> with #include <linux/export.h> 2023-08-09 15:20:50 +02:00
uaccess.c s390/uaccess: Inline __clear_user() 2025-03-04 17:18:04 +01:00
xor.c s390/lib: Use exrl instead of ex in xor functions 2025-01-13 09:50:17 +01:00