diff options
Diffstat (limited to 'arch/arm64/include/asm/kvm_mmu.h')
| -rw-r--r-- | arch/arm64/include/asm/kvm_mmu.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/kvm_mmu.h b/arch/arm64/include/asm/kvm_mmu.h index 3625070..6150567 100644 --- a/arch/arm64/include/asm/kvm_mmu.h +++ b/arch/arm64/include/asm/kvm_mmu.h @@ -68,6 +68,8 @@ #include <asm/pgalloc.h> #include <asm/cachetype.h> #include <asm/cacheflush.h> +#include <asm/mmu_context.h> +#include <asm/pgtable.h> #define KERN_TO_HYP(kva) ((unsigned long)kva - PAGE_OFFSET + HYP_PAGE_OFFSET) @@ -269,5 +271,36 @@ static inline void __kvm_flush_dcache_pud(pud_t pud) void kvm_set_way_flush(struct kvm_vcpu *vcpu); void kvm_toggle_cache(struct kvm_vcpu *vcpu, bool was_enabled); +static inline bool __kvm_cpu_uses_extended_idmap(void) +{ + return __cpu_uses_extended_idmap(); +} + +static inline void __kvm_extend_hypmap(pgd_t *boot_hyp_pgd, + pgd_t *hyp_pgd, + pgd_t *merged_hyp_pgd, + unsigned long hyp_idmap_start) +{ + int idmap_idx; + + /* + * Use the first entry to access the HYP mappings. It is + * guaranteed to be free, otherwise we wouldn't use an + * extended idmap. + */ + VM_BUG_ON(pgd_val(merged_hyp_pgd[0])); + merged_hyp_pgd[0] = __pgd(__pa(hyp_pgd) | PMD_TYPE_TABLE); + + /* + * Create another extended level entry that points to the boot HYP map, + * which contains an ID mapping of the HYP init code. We essentially + * merge the boot and runtime HYP maps by doing so, but they don't + * overlap anyway, so this is fine. + */ + idmap_idx = hyp_idmap_start >> VA_BITS; + VM_BUG_ON(pgd_val(merged_hyp_pgd[idmap_idx])); + merged_hyp_pgd[idmap_idx] = __pgd(__pa(boot_hyp_pgd) | PMD_TYPE_TABLE); +} + #endif /* __ASSEMBLY__ */ #endif /* __ARM64_KVM_MMU_H__ */ |
