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| author | Vivian Wang <wangruikang@iscas.ac.cn> | 2026-03-03 13:29:45 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-07-04 13:43:35 +0200 |
| commit | b26cd98fed977512f940c1ca12667d69796df6c9 (patch) | |
| tree | c516f6c82507dcd5a1379c0eb92023f166b8e1e2 | |
| parent | 3928ae803dee044b01076c478c279c0bd54164cd (diff) | |
| download | linux-b26cd98fed977512f940c1ca12667d69796df6c9.tar.gz linux-b26cd98fed977512f940c1ca12667d69796df6c9.zip | |
riscv: mm: Extract helper mark_new_valid_map()
commit 9ee25d0a70ff4494b4e1d266b962d0a574ef318a upstream.
In preparation of a future patch using the same mechanism for
non-vmalloc addresses, extract the mark_new_valid_map() helper from
flush_cache_vmap().
No functional change intended.
Cc: stable@vger.kernel.org
Signed-off-by: Vivian Wang <wangruikang@iscas.ac.cn>
Link: https://patch.msgid.link/20260303-handle-kfence-protect-spurious-fault-v2-1-f80d8354d79d@iscas.ac.cn
Signed-off-by: Paul Walmsley <pjw@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | arch/riscv/include/asm/cacheflush.h | 25 |
1 files changed, 14 insertions, 11 deletions
diff --git a/arch/riscv/include/asm/cacheflush.h b/arch/riscv/include/asm/cacheflush.h index b59ffeb668d6..a62604fab1aa 100644 --- a/arch/riscv/include/asm/cacheflush.h +++ b/arch/riscv/include/asm/cacheflush.h @@ -43,20 +43,23 @@ do { \ #ifdef CONFIG_64BIT extern u64 new_vmalloc[NR_CPUS / sizeof(u64) + 1]; extern char _end[]; +static inline void mark_new_valid_map(void) +{ + int i; + + /* + * We don't care if concurrently a cpu resets this value since + * the only place this can happen is in handle_exception() where + * an sfence.vma is emitted. + */ + for (i = 0; i < ARRAY_SIZE(new_vmalloc); ++i) + new_vmalloc[i] = -1ULL; +} #define flush_cache_vmap flush_cache_vmap static inline void flush_cache_vmap(unsigned long start, unsigned long end) { - if (is_vmalloc_or_module_addr((void *)start)) { - int i; - - /* - * We don't care if concurrently a cpu resets this value since - * the only place this can happen is in handle_exception() where - * an sfence.vma is emitted. - */ - for (i = 0; i < ARRAY_SIZE(new_vmalloc); ++i) - new_vmalloc[i] = -1ULL; - } + if (is_vmalloc_or_module_addr((void *)start)) + mark_new_valid_map(); } #define flush_cache_vmap_early(start, end) local_flush_tlb_kernel_range(start, end) #endif |