diff options
| author | Huacai Chen <chenhuacai@loongson.cn> | 2024-10-23 17:15:30 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-11-01 04:02:42 +0300 |
| commit | 7abab6827b5703b8fa4fac00101a3253ff2bf58b (patch) | |
| tree | 3aa89dc13490816491393e1ae2888031b103dcc4 | |
| parent | afbfb3568d78082078acc8bb2b29bb47af87253c (diff) | |
| download | linux-7abab6827b5703b8fa4fac00101a3253ff2bf58b.tar.xz | |
LoongArch: Make KASAN usable for variable cpu_vabits
commit 3c252263be801f937f56b4bcd8e8e2b5307c1ce5 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -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 */ |