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mirror-linux/arch/hexagon/include/asm
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Masami Hiramatsu (Google) a494d3c8d5 ring-buffer: Flush and stop persistent ring buffer on panic 
On real hardware, panic and machine reboot may not flush hardware cache
to memory. This means the persistent ring buffer, which relies on a
coherent state of memory, may not have its events written to the buffer
and they may be lost. Moreover, there may be inconsistency with the
counters which are used for validation of the integrity of the
persistent ring buffer which may cause all data to be discarded.

To avoid this issue, stop recording of the ring buffer on panic and
flush the cache of the ring buffer's memory.

Fixes: e645535a95 ("tracing: Add option to use memmapped memory for trace boot instance")
Cc: stable@vger.kernel.org
Cc: Will Deacon <will@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Ian Rogers <irogers@google.com>
Link: https://patch.msgid.link/177751969602.2136606.12031934362587643488.stgit@mhiramat.tok.corp.google.com
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
 		2026-05-21 08:20:58 -04:00
..
Kbuild ring-buffer: Flush and stop persistent ring buffer on panic 2026-05-21 08:20:58 -04:00
asm-offsets.h
…
atomic.h locking/atomic: treewide: delete arch_atomic_*() kerneldoc 2023-06-05 09:57:24 +02:00
bitops.h hexagon: Add __attribute_const__ to ffs()-family implementations 2025-09-08 14:58:51 -07:00
cache.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
cacheflush.h mm: rationalise flush_icache_pages() and flush_icache_page() 2023-08-24 16:20:25 -07:00
checksum.h unify generic instances of csum_partial_copy_nocheck() 2020-08-20 15:45:14 -04:00
cmpxchg.h hexagon: fix using plain integer as NULL pointer warning in cmpxchg 2025-01-30 18:44:54 -08:00
delay.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
dma.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
elf.h whack-a-mole: USE_ELF_CORE_DUMP 2020-10-25 20:03:05 -04:00
exec.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
fixmap.h mm: pgtable: add shortcuts for accessing kernel PMD and PTE 2020-06-09 09:39:13 -07:00
fpu.h
…
futex.h Hexagon: change jumps to must-extend in futex_atomic_* 2021-05-03 11:04:19 -05:00
hexagon_vm.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
intrinsics.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
io.h hexagon: simplify asm/io.h for !HAS_IOPORT 2024-10-28 21:44:29 +00:00
irq.h hexagon: irq: add prototype for arch_do_IRQ() 2023-12-10 17:21:37 -08:00
irqflags.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
kgdb.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
linkage.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
mem-layout.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
mmu.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
mmu_context.h hexagon: use asm-generic/mmu_context.h for no-op implementations 2020-10-27 16:02:35 +01:00
page.h mm: convert do_brk_flags() to use vma_flags_t 2026-04-05 13:53:40 -07:00
perf_event.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
pgalloc.h mm: pgtable: convert some architectures to use tlb_remove_ptdesc() 2025-04-01 15:17:13 -07:00
pgtable.h arch, mm: consolidate empty_zero_page 2026-04-05 13:53:01 -07:00
processor.h kernel: exit: cleanup release_thread() 2022-09-11 21:55:07 -07:00
ptrace.h hexagon: Remove unusable symbols from the ptrace.h uapi 2023-10-25 15:54:24 +02:00
setup.h hexagon: Move kernel prototypes out of uapi/asm/setup.h header 2025-01-30 18:45:45 -08:00
signal.h hexagon: Drop invalid UAPI header asm/signal.h 2026-01-06 15:07:32 -07:00
smp.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
spinlock.h hexagon: parenthesize registers in asm predicates 2020-01-04 13:55:09 -08:00
spinlock_types.h Improve consistency of '#error' directive messages 2024-11-11 17:17:04 -08:00
string.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
suspend.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
switch_to.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
syscall.h syscall.h: introduce syscall_set_nr() 2025-05-11 17:48:15 -07:00
syscalls.h hexagon: fix fadvise64_64 calling conventions 2024-06-25 15:57:37 +02:00
thread_info.h uaccess: remove CONFIG_SET_FS 2022-02-25 09:36:06 +01:00
time.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
timex.h hexagon: clean up timer-regs.h 2021-11-20 10:35:54 -08:00
tlb.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
tlbflush.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
traps.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
uaccess.h uaccess: generalize access_ok() 2022-02-25 09:36:05 +01:00
unistd.h hexagon: use new system call table 2024-07-10 14:23:38 +02:00
vdso.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
vermagic.h arch: split MODULE_ARCH_VERMAGIC definitions out to <asm/vermagic.h> 2020-04-23 10:50:26 +09:00
vm_fault.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
vm_mmu.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
vmalloc.h mm/vmalloc: Add empty <asm/vmalloc.h> headers and use them from <linux/vmalloc.h> 2019-12-10 10:12:55 +01:00