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arm64: Drop unneeded __nocfi attributes 

With -fsanitize=kcfi, CONFIG_CFI_CLANG no longer has issues
with address space confusion in functions that switch to linear
mapping. Now that the indirectly called assembly functions have
type annotations, drop the __nocfi attributes.

Suggested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Tested-by: Kees Cook <keescook@chromium.org>
Tested-by: Nathan Chancellor <nathan@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20220908215504.3686827-12-samitolvanen@google.com
This commit is contained in:
Sami Tolvanen 2022-09-08 14:54:53 -07:00 committed by Kees Cook
parent b26e484b8b
commit 5f20997c19
3 changed files with 3 additions and 3 deletions
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2
arch/arm64/include/asm/mmu_context.h
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@ -147,7 +147,7 @@ static inline void cpu_install_ttbr0(phys_addr_t ttbr0, unsigned long t0sz)
* Atomically replaces the active TTBR1_EL1 PGD with a new VA-compatible PGD,
* avoiding the possibility of conflicting TLB entries being allocated.
*/
static inline void __nocfi cpu_replace_ttbr1(pgd_t *pgdp, pgd_t *idmap)
static inline void cpu_replace_ttbr1(pgd_t *pgdp, pgd_t *idmap)
{
typedef void (ttbr_replace_func)(phys_addr_t);
extern ttbr_replace_func idmap_cpu_replace_ttbr1;

2
arch/arm64/kernel/alternative.c
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@ -133,7 +133,7 @@ static void clean_dcache_range_nopatch(u64 start, u64 end)
} while (cur += d_size, cur < end);
}
static void __nocfi __apply_alternatives(struct alt_region *region, bool is_module,
static void __apply_alternatives(struct alt_region *region, bool is_module,
unsigned long *feature_mask)
{
struct alt_instr *alt;

2
arch/arm64/kernel/cpufeature.c
View File

@ -1685,7 +1685,7 @@ static phys_addr_t kpti_ng_pgd_alloc(int shift)
return kpti_ng_temp_alloc;
}
static void __nocfi
static void
kpti_install_ng_mappings(const struct arm64_cpu_capabilities *__unused)
{
typedef void (kpti_remap_fn)(int, int, phys_addr_t, unsigned long);