diff options
Diffstat (limited to 'arch/arm64/include/asm/kvm_mmu.h')
| -rw-r--r-- | arch/arm64/include/asm/kvm_mmu.h | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/arch/arm64/include/asm/kvm_mmu.h b/arch/arm64/include/asm/kvm_mmu.h index 7342d2c51773..ac3ca9690bad 100644 --- a/arch/arm64/include/asm/kvm_mmu.h +++ b/arch/arm64/include/asm/kvm_mmu.h @@ -145,7 +145,6 @@ static inline unsigned long __kern_hyp_va(unsigned long v) #define kvm_phys_shift(kvm) KVM_PHYS_SHIFT #define kvm_phys_size(kvm) (_AC(1, ULL) << kvm_phys_shift(kvm)) #define kvm_phys_mask(kvm) (kvm_phys_size(kvm) - _AC(1, ULL)) -#define kvm_vttbr_baddr_mask(kvm) VTTBR_BADDR_MASK static inline bool kvm_page_empty(void *ptr) { @@ -520,5 +519,29 @@ static inline int hyp_map_aux_data(void) #define kvm_phys_to_vttbr(addr) phys_to_ttbr(addr) +/* + * Get the magic number 'x' for VTTBR:BADDR of this KVM instance. + * With v8.2 LVA extensions, 'x' should be a minimum of 6 with + * 52bit IPS. + */ +static inline int arm64_vttbr_x(u32 ipa_shift, u32 levels) +{ + int x = ARM64_VTTBR_X(ipa_shift, levels); + + return (IS_ENABLED(CONFIG_ARM64_PA_BITS_52) && x < 6) ? 6 : x; +} + +static inline u64 vttbr_baddr_mask(u32 ipa_shift, u32 levels) +{ + unsigned int x = arm64_vttbr_x(ipa_shift, levels); + + return GENMASK_ULL(PHYS_MASK_SHIFT - 1, x); +} + +static inline u64 kvm_vttbr_baddr_mask(struct kvm *kvm) +{ + return vttbr_baddr_mask(kvm_phys_shift(kvm), kvm_stage2_levels(kvm)); +} + #endif /* __ASSEMBLY__ */ #endif /* __ARM64_KVM_MMU_H__ */ |