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| author | Huacai Chen <chenhuacai@loongson.cn> | 2024-10-23 17:15:30 +0300 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2024-10-23 17:15:30 +0300 |
| commit | 3c252263be801f937f56b4bcd8e8e2b5307c1ce5 (patch) | |
| tree | b7a4492bf7e9565d0749e7d3384abd392604be32 /arch | |
| parent | d2f8671045b41871053dedaf3035a06ad53d2736 (diff) | |
| download | linux-3c252263be801f937f56b4bcd8e8e2b5307c1ce5.tar.xz | |
LoongArch: Make KASAN usable for variable cpu_vabits
Currently, KASAN on LoongArch assume the CPU VA bits is 48, which is
true for Loongson-3 series, but not for Loongson-2 series (only 40 or
lower), this patch fix that issue and make KASAN usable for variable
cpu_vabits.
Solution is very simple: Just define XRANGE_SHADOW_SHIFT which means
valid address length from VA_BITS to min(cpu_vabits, VA_BITS).
Cc: stable@vger.kernel.org
Signed-off-by: Kanglong Wang <wangkanglong@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/loongarch/include/asm/kasan.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/loongarch/include/asm/kasan.h b/arch/loongarch/include/asm/kasan.h index cd6084f4e153..c6bce5fbff57 100644 --- a/arch/loongarch/include/asm/kasan.h +++ b/arch/loongarch/include/asm/kasan.h @@ -16,7 +16,7 @@ #define XRANGE_SHIFT (48) /* Valid address length */ -#define XRANGE_SHADOW_SHIFT (PGDIR_SHIFT + PAGE_SHIFT - 3) +#define XRANGE_SHADOW_SHIFT min(cpu_vabits, VA_BITS) /* Used for taking out the valid address */ #define XRANGE_SHADOW_MASK GENMASK_ULL(XRANGE_SHADOW_SHIFT - 1, 0) /* One segment whole address space size */ |