diff options
| author | Mario Smarduch <m.smarduch@samsung.com> | 2015-01-15 15:58:59 -0800 |
|---|---|---|
| committer | Christoffer Dall <christoffer.dall@linaro.org> | 2015-01-16 14:42:48 +0100 |
| commit | 8199ed0e7c28ece79674a9fbba3208e93395a646 (patch) | |
| tree | 1d6fbae21b2cc6d7624b149da7b0d8cf3d326683 /arch/arm64/include/asm/kvm_mmu.h | |
| parent | 15a49a44fc36209e1112e9b8451d653cd07f17a8 (diff) | |
| download | lwn-8199ed0e7c28ece79674a9fbba3208e93395a646.tar.gz lwn-8199ed0e7c28ece79674a9fbba3208e93395a646.zip | |
KVM: arm64: ARMv8 header changes for page logging
This patch adds arm64 helpers to write protect pmds/ptes and retrieve
permissions while logging dirty pages. Also adds prototype to write protect
a memory slot and adds a pmd define to check for read-only pmds.
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Mario Smarduch <m.smarduch@samsung.com>
Diffstat (limited to 'arch/arm64/include/asm/kvm_mmu.h')
| -rw-r--r-- | arch/arm64/include/asm/kvm_mmu.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/kvm_mmu.h b/arch/arm64/include/asm/kvm_mmu.h index 14a74f136272..66577581ce68 100644 --- a/arch/arm64/include/asm/kvm_mmu.h +++ b/arch/arm64/include/asm/kvm_mmu.h @@ -118,6 +118,27 @@ static inline void kvm_set_s2pmd_writable(pmd_t *pmd) pmd_val(*pmd) |= PMD_S2_RDWR; } +static inline void kvm_set_s2pte_readonly(pte_t *pte) +{ + pte_val(*pte) = (pte_val(*pte) & ~PTE_S2_RDWR) | PTE_S2_RDONLY; +} + +static inline bool kvm_s2pte_readonly(pte_t *pte) +{ + return (pte_val(*pte) & PTE_S2_RDWR) == PTE_S2_RDONLY; +} + +static inline void kvm_set_s2pmd_readonly(pmd_t *pmd) +{ + pmd_val(*pmd) = (pmd_val(*pmd) & ~PMD_S2_RDWR) | PMD_S2_RDONLY; +} + +static inline bool kvm_s2pmd_readonly(pmd_t *pmd) +{ + return (pmd_val(*pmd) & PMD_S2_RDWR) == PMD_S2_RDONLY; +} + + #define kvm_pgd_addr_end(addr, end) pgd_addr_end(addr, end) #define kvm_pud_addr_end(addr, end) pud_addr_end(addr, end) #define kvm_pmd_addr_end(addr, end) pmd_addr_end(addr, end) |