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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2021-02-03 11:03:40 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-02-03 11:03:40 -0800 |
| commit | 3afe9076a7c19140b789d144d0ba1e9be2db4265 (patch) | |
| tree | 3ef35a49148dfe04009ee324fb059488ddaffcee | |
| parent | dbc15d24f9fa6f25723ef750b65b98bfcd3d3910 (diff) | |
| parent | 22cd5edb2d9c6d68b6ac0fc9584104d88710fa57 (diff) | |
Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Catalin Marinas:
"Fix the arm64 linear map range detection for tagged addresses and
replace the bitwise operations with subtract (virt_addr_valid(),
__is_lm_address(), __lm_to_phys())"
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: Use simpler arithmetics for the linear map macros
arm64: Do not pass tagged addresses to __is_lm_address()
| -rw-r--r-- | arch/arm64/include/asm/memory.h | 6 | ||||
| -rw-r--r-- | arch/arm64/mm/physaddr.c | 2 |
2 files changed, 4 insertions, 4 deletions
diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h index 99d7e1494aaa..ff4732785c32 100644 --- a/arch/arm64/include/asm/memory.h +++ b/arch/arm64/include/asm/memory.h @@ -251,9 +251,9 @@ static inline const void *__tag_set(const void *addr, u8 tag) * lives in the [PAGE_OFFSET, PAGE_END) interval at the bottom of the * kernel's TTBR1 address range. */ -#define __is_lm_address(addr) (((u64)(addr) ^ PAGE_OFFSET) < (PAGE_END - PAGE_OFFSET)) +#define __is_lm_address(addr) (((u64)(addr) - PAGE_OFFSET) < (PAGE_END - PAGE_OFFSET)) -#define __lm_to_phys(addr) (((addr) & ~PAGE_OFFSET) + PHYS_OFFSET) +#define __lm_to_phys(addr) (((addr) - PAGE_OFFSET) + PHYS_OFFSET) #define __kimg_to_phys(addr) ((addr) - kimage_voffset) #define __virt_to_phys_nodebug(x) ({ \ @@ -332,7 +332,7 @@ static inline void *phys_to_virt(phys_addr_t x) #endif /* !CONFIG_SPARSEMEM_VMEMMAP || CONFIG_DEBUG_VIRTUAL */ #define virt_addr_valid(addr) ({ \ - __typeof__(addr) __addr = addr; \ + __typeof__(addr) __addr = __tag_reset(addr); \ __is_lm_address(__addr) && pfn_valid(virt_to_pfn(__addr)); \ }) diff --git a/arch/arm64/mm/physaddr.c b/arch/arm64/mm/physaddr.c index 67a9ba9eaa96..cde44c13dda1 100644 --- a/arch/arm64/mm/physaddr.c +++ b/arch/arm64/mm/physaddr.c @@ -9,7 +9,7 @@ phys_addr_t __virt_to_phys(unsigned long x) { - WARN(!__is_lm_address(x), + WARN(!__is_lm_address(__tag_reset(x)), "virt_to_phys used for non-linear address: %pK (%pS)\n", (void *)x, (void *)x); |