diff options
Diffstat (limited to 'arch/x86/kvm/mmu/spte.h')
| -rw-r--r-- | arch/x86/kvm/mmu/spte.h | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/arch/x86/kvm/mmu/spte.h b/arch/x86/kvm/mmu/spte.h index 7670c13ce251..6f54dc9409c9 100644 --- a/arch/x86/kvm/mmu/spte.h +++ b/arch/x86/kvm/mmu/spte.h @@ -188,7 +188,7 @@ extern u64 __read_mostly shadow_nonpresent_or_rsvd_mask; * should not modify the SPTE. * * Use a semi-arbitrary value that doesn't set RWX bits, i.e. is not-present on - * bot AMD and Intel CPUs, and doesn't set PFN bits, i.e. doesn't create a L1TF + * both AMD and Intel CPUs, and doesn't set PFN bits, i.e. doesn't create a L1TF * vulnerability. Use only low bits to avoid 64-bit immediates. * * Only used by the TDP MMU. @@ -219,6 +219,23 @@ static inline int spte_index(u64 *sptep) */ extern u64 __read_mostly shadow_nonpresent_or_rsvd_lower_gfn_mask; +static inline struct kvm_mmu_page *to_shadow_page(hpa_t shadow_page) +{ + struct page *page = pfn_to_page((shadow_page) >> PAGE_SHIFT); + + return (struct kvm_mmu_page *)page_private(page); +} + +static inline struct kvm_mmu_page *spte_to_child_sp(u64 spte) +{ + return to_shadow_page(spte & SPTE_BASE_ADDR_MASK); +} + +static inline struct kvm_mmu_page *sptep_to_sp(u64 *sptep) +{ + return to_shadow_page(__pa(sptep)); +} + static inline bool is_mmio_spte(u64 spte) { return (spte & shadow_mmio_mask) == shadow_mmio_value && @@ -346,7 +363,7 @@ static __always_inline bool is_rsvd_spte(struct rsvd_bits_validate *rsvd_check, * A shadow-present leaf SPTE may be non-writable for 4 possible reasons: * * 1. To intercept writes for dirty logging. KVM write-protects huge pages - * so that they can be split be split down into the dirty logging + * so that they can be split down into the dirty logging * granularity (4KiB) whenever the guest writes to them. KVM also * write-protects 4KiB pages so that writes can be recorded in the dirty log * (e.g. if not using PML). SPTEs are write-protected for dirty logging |