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| author | Mario Smarduch <m.smarduch@samsung.com> | 2015-01-16 00:58:59 +0100 |
|---|---|---|
| committer | Christoffer Dall <christoffer.dall@linaro.org> | 2015-01-16 14:42:48 +0100 |
| commit | 8199ed0e7c28ece79674a9fbba3208e93395a646 (patch) | |
| tree | 1d6fbae21b2cc6d7624b149da7b0d8cf3d326683 /arch/arm64/include | |
| parent | KVM: arm: page logging 2nd stage fault handling (diff) | |
| download | linux-8199ed0e7c28ece79674a9fbba3208e93395a646.tar.xz linux-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')
| -rw-r--r-- | arch/arm64/include/asm/kvm_asm.h | 1 | ||||
| -rw-r--r-- | arch/arm64/include/asm/kvm_host.h | 1 | ||||
| -rw-r--r-- | arch/arm64/include/asm/kvm_mmu.h | 21 | ||||
| -rw-r--r-- | arch/arm64/include/asm/pgtable-hwdef.h | 1 |
4 files changed, 24 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/kvm_asm.h b/arch/arm64/include/asm/kvm_asm.h index 483842180f8f..4f7310fa77f0 100644 --- a/arch/arm64/include/asm/kvm_asm.h +++ b/arch/arm64/include/asm/kvm_asm.h @@ -126,6 +126,7 @@ extern char __kvm_hyp_vector[]; extern void __kvm_flush_vm_context(void); extern void __kvm_tlb_flush_vmid_ipa(struct kvm *kvm, phys_addr_t ipa); +extern void __kvm_tlb_flush_vmid(struct kvm *kvm); extern int __kvm_vcpu_run(struct kvm_vcpu *vcpu); diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 0b7dfdb931df..012af6ce9eed 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -199,6 +199,7 @@ struct kvm_vcpu * __percpu *kvm_get_running_vcpus(void); u64 kvm_call_hyp(void *hypfn, ...); void force_vm_exit(const cpumask_t *mask); +void kvm_mmu_wp_memory_region(struct kvm *kvm, int slot); int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run, int exception_index); 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) diff --git a/arch/arm64/include/asm/pgtable-hwdef.h b/arch/arm64/include/asm/pgtable-hwdef.h index 88174e0bfafe..5f930cc9ea83 100644 --- a/arch/arm64/include/asm/pgtable-hwdef.h +++ b/arch/arm64/include/asm/pgtable-hwdef.h @@ -119,6 +119,7 @@ #define PTE_S2_RDONLY (_AT(pteval_t, 1) << 6) /* HAP[2:1] */ #define PTE_S2_RDWR (_AT(pteval_t, 3) << 6) /* HAP[2:1] */ +#define PMD_S2_RDONLY (_AT(pmdval_t, 1) << 6) /* HAP[2:1] */ #define PMD_S2_RDWR (_AT(pmdval_t, 3) << 6) /* HAP[2:1] */ /* |