diff options
| author | Dave Anderson <anderson@redhat.com> | 2014-04-15 18:53:24 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2014-07-24 00:51:40 +0100 |
| commit | 39cbf100c68a8eb833aa164eb925460955617b73 (patch) | |
| tree | 781fc777e621eef119aaf24e0bb6bdf165a69c03 | |
| parent | 21b549b0dd52728a10687a233ef8266aa4d4c8a1 (diff) | |
arm64: Fix for the arm64 kern_addr_valid() function
Fix for the arm64 kern_addr_valid() function to recognize
virtual addresses in the kernel logical memory map. The
function fails as written because it does not check whether
the addresses in that region are mapped at the pmd level to
2MB or 512MB pages, continues the page table walk to the
pte level, and issues a garbage value to pfn_valid().
Tested on 4K-page and 64K-page kernels.
Signed-off-by: Dave Anderson <anderson@redhat.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
(cherry picked from commit da6e4cb67c6dd1f72257c0a4a97c26dc4e80d3a7)
Signed-off-by: Mark Brown <broonie@linaro.org>
| -rw-r--r-- | arch/arm64/include/asm/pgtable.h | 3 | ||||
| -rw-r--r-- | arch/arm64/mm/mmu.c | 3 |
2 files changed, 3 insertions, 3 deletions
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index 56336f19b60d..d786b8940bbe 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -86,14 +86,12 @@ extern void __pgd_error(const char *file, int line, unsigned long val); #define PAGE_COPY_EXEC __pgprot(_PAGE_DEFAULT | PTE_USER | PTE_NG | PTE_PXN) #define PAGE_READONLY __pgprot(_PAGE_DEFAULT | PTE_USER | PTE_NG | PTE_PXN | PTE_UXN) #define PAGE_READONLY_EXEC __pgprot(_PAGE_DEFAULT | PTE_USER | PTE_NG | PTE_PXN) -#define PAGE_EXECONLY __pgprot(_PAGE_DEFAULT | PTE_NG | PTE_PXN) #define __P000 PAGE_NONE #define __P001 PAGE_READONLY #define __P010 PAGE_COPY #define __P011 PAGE_COPY #define __P100 PAGE_READONLY_EXEC -#define __P100 PAGE_EXECONLY #define __P101 PAGE_READONLY_EXEC #define __P110 PAGE_COPY_EXEC #define __P111 PAGE_COPY_EXEC @@ -103,7 +101,6 @@ extern void __pgd_error(const char *file, int line, unsigned long val); #define __S010 PAGE_SHARED #define __S011 PAGE_SHARED #define __S100 PAGE_READONLY_EXEC -#define __S100 PAGE_EXECONLY #define __S101 PAGE_READONLY_EXEC #define __S110 PAGE_SHARED_EXEC #define __S111 PAGE_SHARED_EXEC diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c index 37d02a863c0e..639dca61ad7a 100644 --- a/arch/arm64/mm/mmu.c +++ b/arch/arm64/mm/mmu.c @@ -371,6 +371,9 @@ int kern_addr_valid(unsigned long addr) if (pmd_none(*pmd)) return 0; + if (pmd_sect(*pmd)) + return pfn_valid(pmd_pfn(*pmd)); + pte = pte_offset_kernel(pmd, addr); if (pte_none(*pte)) return 0; |