diff options
| author | Mike Rapoport (Microsoft) <rppt@kernel.org> | 2025-07-13 10:17:30 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2025-08-02 12:06:12 -0700 |
| commit | 5d79c2be508143559c65ace445e7a951ef92881b (patch) | |
| tree | ecdf3d8e9c2fd7bc0b98a576294c84e5c27e9fbf /arch/x86/mm | |
| parent | x86/kprobes: enable EXECMEM_ROX_CACHE for kprobes allocations (diff) | |
| download | linux-5d79c2be508143559c65ace445e7a951ef92881b.tar.gz linux-5d79c2be508143559c65ace445e7a951ef92881b.zip | |
x86/ftrace: enable EXECMEM_ROX_CACHE for ftrace allocations
For the most part ftrace uses text poking and can handle ROX memory. The
only place that requires writable memory is create_trampoline() that
updates the allocated memory and in the end makes it ROX.
Use execmem_alloc_rw() in x86::ftrace::alloc_tramp() and enable ROX cache
for EXECMEM_FTRACE when configuration and CPU features allow that.
Link: https://lkml.kernel.org/r/20250713071730.4117334-9-rppt@kernel.org
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Cc: Daniel Gomez <da.gomez@samsung.com>
Cc: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Cc: Petr Pavlu <petr.pavlu@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'arch/x86/mm')
| -rw-r--r-- | arch/x86/mm/init.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c index 442fafd8ff52..bb57e93b4caf 100644 --- a/arch/x86/mm/init.c +++ b/arch/x86/mm/init.c @@ -1105,7 +1105,14 @@ struct execmem_info __init *execmem_arch_setup(void) .pgprot = PAGE_KERNEL_ROX, .alignment = MODULE_ALIGN, }, - [EXECMEM_FTRACE ... EXECMEM_BPF] = { + [EXECMEM_FTRACE] = { + .flags = flags, + .start = start, + .end = MODULES_END, + .pgprot = pgprot, + .alignment = MODULE_ALIGN, + }, + [EXECMEM_BPF] = { .flags = EXECMEM_KASAN_SHADOW, .start = start, .end = MODULES_END, |