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| author | Mario Smarduch <m.smarduch@samsung.com> | 2015-01-15 15:58:56 -0800 |
|---|---|---|
| committer | Christoffer Dall <christoffer.dall@linaro.org> | 2015-01-16 14:40:14 +0100 |
| commit | c64735554c0aad2dc83c737ecf4c32075bed57a4 (patch) | |
| tree | 6ade125293fcfa52ce1142d9e74cc70ddc16c5c5 /arch/arm/include/asm/kvm_mmu.h | |
| parent | 72fc36b600f73e37557576af80c58836dcf389f9 (diff) | |
| download | linux-c64735554c0aad2dc83c737ecf4c32075bed57a4.tar.bz2 | |
KVM: arm: Add initial dirty page locking support
Add support for initial write protection of VM memslots. This patch
series assumes that huge PUDs will not be used in 2nd stage tables, which is
always valid on ARMv7
Acked-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Mario Smarduch <m.smarduch@samsung.com>
Diffstat (limited to 'arch/arm/include/asm/kvm_mmu.h')
| -rw-r--r-- | arch/arm/include/asm/kvm_mmu.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/arm/include/asm/kvm_mmu.h b/arch/arm/include/asm/kvm_mmu.h index 63e0ecc04901..2672cf84afd1 100644 --- a/arch/arm/include/asm/kvm_mmu.h +++ b/arch/arm/include/asm/kvm_mmu.h @@ -114,6 +114,27 @@ static inline void kvm_set_s2pmd_writable(pmd_t *pmd) pmd_val(*pmd) |= L_PMD_S2_RDWR; } +static inline void kvm_set_s2pte_readonly(pte_t *pte) +{ + pte_val(*pte) = (pte_val(*pte) & ~L_PTE_S2_RDWR) | L_PTE_S2_RDONLY; +} + +static inline bool kvm_s2pte_readonly(pte_t *pte) +{ + return (pte_val(*pte) & L_PTE_S2_RDWR) == L_PTE_S2_RDONLY; +} + +static inline void kvm_set_s2pmd_readonly(pmd_t *pmd) +{ + pmd_val(*pmd) = (pmd_val(*pmd) & ~L_PMD_S2_RDWR) | L_PMD_S2_RDONLY; +} + +static inline bool kvm_s2pmd_readonly(pmd_t *pmd) +{ + return (pmd_val(*pmd) & L_PMD_S2_RDWR) == L_PMD_S2_RDONLY; +} + + /* Open coded p*d_addr_end that can deal with 64bit addresses */ #define kvm_pgd_addr_end(addr, end) \ ({ u64 __boundary = ((addr) + PGDIR_SIZE) & PGDIR_MASK; \ |