mirrors/linux
2
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-09-14 00:13:41 -04:00
Code Issues Packages Projects Releases Wiki Activity

riscv: mm: Extract helper mark_new_valid_map()

Browse Source 
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>
This commit is contained in:
Vivian Wang
2026-03-03 13:29:45 +08:00
committed by Paul Walmsley
parent 8ac35bac70
commit 9ee25d0a70
1 changed files with 14 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

25
arch/riscv/include/asm/cacheflush.h
View File

@@ -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