* HYP_VA_MIN = 1 << (VA_BITS - 1)
* HYP_VA_MAX = HYP_VA_MIN + (1 << (VA_BITS - 1)) - 1
*
- * This of course assumes that the trampoline page exists within the
- * VA_BITS range. If it doesn't, then it means we're in the odd case
- * where the kernel idmap (as well as HYP) uses more levels than the
- * kernel runtime page tables (as seen when the kernel is configured
- * for 4k pages, 39bits VA, and yet memory lives just above that
- * limit, forcing the idmap to use 4 levels of page tables while the
- * kernel itself only uses 3). In this particular case, it doesn't
- * matter which side of VA_BITS we use, as we're guaranteed not to
- * conflict with anything.
- *
* When using VHE, there are no separate hyp mappings and all KVM
* functionality is already mapped as part of the main kernel
* mappings, and none of this applies in that case.
#define kvm_phys_size(kvm) (_AC(1, ULL) << kvm_phys_shift(kvm))
#define kvm_phys_mask(kvm) (kvm_phys_size(kvm) - _AC(1, ULL))
-static inline bool kvm_page_empty(void *ptr)
-{
- struct page *ptr_page = virt_to_page(ptr);
- return page_count(ptr_page) == 1;
-}
-
+#include <asm/kvm_pgtable.h>
#include <asm/stage2_pgtable.h>
-int create_hyp_mappings(void *from, void *to, pgprot_t prot);
+int create_hyp_mappings(void *from, void *to, enum kvm_pgtable_prot prot);
int create_hyp_io_mappings(phys_addr_t phys_addr, size_t size,
void __iomem **kaddr,
void __iomem **haddr);
int kvm_handle_guest_abort(struct kvm_vcpu *vcpu);
-void kvm_mmu_free_memory_caches(struct kvm_vcpu *vcpu);
-
phys_addr_t kvm_mmu_get_httbr(void);
phys_addr_t kvm_get_idmap_vector(void);
int kvm_mmu_init(void);
-void kvm_clear_hyp_idmap(void);
-
-#define kvm_mk_pmd(ptep) \
- __pmd(__phys_to_pmd_val(__pa(ptep)) | PMD_TYPE_TABLE)
-#define kvm_mk_pud(pmdp) \
- __pud(__phys_to_pud_val(__pa(pmdp)) | PMD_TYPE_TABLE)
-#define kvm_mk_p4d(pmdp) \
- __p4d(__phys_to_p4d_val(__pa(pmdp)) | PUD_TYPE_TABLE)
-
-#define kvm_set_pud(pudp, pud) set_pud(pudp, pud)
-
-#define kvm_pfn_pte(pfn, prot) pfn_pte(pfn, prot)
-#define kvm_pfn_pmd(pfn, prot) pfn_pmd(pfn, prot)
-#define kvm_pfn_pud(pfn, prot) pfn_pud(pfn, prot)
-
-#define kvm_pud_pfn(pud) pud_pfn(pud)
-
-#define kvm_pmd_mkhuge(pmd) pmd_mkhuge(pmd)
-#define kvm_pud_mkhuge(pud) pud_mkhuge(pud)
-
-static inline pte_t kvm_s2pte_mkwrite(pte_t pte)
-{
- pte_val(pte) |= PTE_S2_RDWR;
- return pte;
-}
-
-static inline pmd_t kvm_s2pmd_mkwrite(pmd_t pmd)
-{
- pmd_val(pmd) |= PMD_S2_RDWR;
- return pmd;
-}
-
-static inline pud_t kvm_s2pud_mkwrite(pud_t pud)
-{
- pud_val(pud) |= PUD_S2_RDWR;
- return pud;
-}
-
-static inline pte_t kvm_s2pte_mkexec(pte_t pte)
-{
- pte_val(pte) &= ~PTE_S2_XN;
- return pte;
-}
-
-static inline pmd_t kvm_s2pmd_mkexec(pmd_t pmd)
-{
- pmd_val(pmd) &= ~PMD_S2_XN;
- return pmd;
-}
-
-static inline pud_t kvm_s2pud_mkexec(pud_t pud)
-{
- pud_val(pud) &= ~PUD_S2_XN;
- return pud;
-}
-
-static inline void kvm_set_s2pte_readonly(pte_t *ptep)
-{
- pteval_t old_pteval, pteval;
-
- pteval = READ_ONCE(pte_val(*ptep));
- do {
- old_pteval = pteval;
- pteval &= ~PTE_S2_RDWR;
- pteval |= PTE_S2_RDONLY;
- pteval = cmpxchg_relaxed(&pte_val(*ptep), old_pteval, pteval);
- } while (pteval != old_pteval);
-}
-
-static inline bool kvm_s2pte_readonly(pte_t *ptep)
-{
- return (READ_ONCE(pte_val(*ptep)) & PTE_S2_RDWR) == PTE_S2_RDONLY;
-}
-
-static inline bool kvm_s2pte_exec(pte_t *ptep)
-{
- return !(READ_ONCE(pte_val(*ptep)) & PTE_S2_XN);
-}
-
-static inline void kvm_set_s2pmd_readonly(pmd_t *pmdp)
-{
- kvm_set_s2pte_readonly((pte_t *)pmdp);
-}
-
-static inline bool kvm_s2pmd_readonly(pmd_t *pmdp)
-{
- return kvm_s2pte_readonly((pte_t *)pmdp);
-}
-
-static inline bool kvm_s2pmd_exec(pmd_t *pmdp)
-{
- return !(READ_ONCE(pmd_val(*pmdp)) & PMD_S2_XN);
-}
-
-static inline void kvm_set_s2pud_readonly(pud_t *pudp)
-{
- kvm_set_s2pte_readonly((pte_t *)pudp);
-}
-
-static inline bool kvm_s2pud_readonly(pud_t *pudp)
-{
- return kvm_s2pte_readonly((pte_t *)pudp);
-}
-
-static inline bool kvm_s2pud_exec(pud_t *pudp)
-{
- return !(READ_ONCE(pud_val(*pudp)) & PUD_S2_XN);
-}
-
-static inline pud_t kvm_s2pud_mkyoung(pud_t pud)
-{
- return pud_mkyoung(pud);
-}
-
-static inline bool kvm_s2pud_young(pud_t pud)
-{
- return pud_young(pud);
-}
-
-#define hyp_pte_table_empty(ptep) kvm_page_empty(ptep)
-
-#ifdef __PAGETABLE_PMD_FOLDED
-#define hyp_pmd_table_empty(pmdp) (0)
-#else
-#define hyp_pmd_table_empty(pmdp) kvm_page_empty(pmdp)
-#endif
-
-#ifdef __PAGETABLE_PUD_FOLDED
-#define hyp_pud_table_empty(pudp) (0)
-#else
-#define hyp_pud_table_empty(pudp) kvm_page_empty(pudp)
-#endif
-
-#ifdef __PAGETABLE_P4D_FOLDED
-#define hyp_p4d_table_empty(p4dp) (0)
-#else
-#define hyp_p4d_table_empty(p4dp) kvm_page_empty(p4dp)
-#endif
struct kvm;
}
}
-static inline void __kvm_flush_dcache_pte(pte_t pte)
-{
- if (!cpus_have_const_cap(ARM64_HAS_STAGE2_FWB)) {
- struct page *page = pte_page(pte);
- kvm_flush_dcache_to_poc(page_address(page), PAGE_SIZE);
- }
-}
-
-static inline void __kvm_flush_dcache_pmd(pmd_t pmd)
-{
- if (!cpus_have_const_cap(ARM64_HAS_STAGE2_FWB)) {
- struct page *page = pmd_page(pmd);
- kvm_flush_dcache_to_poc(page_address(page), PMD_SIZE);
- }
-}
-
-static inline void __kvm_flush_dcache_pud(pud_t pud)
-{
- if (!cpus_have_const_cap(ARM64_HAS_STAGE2_FWB)) {
- struct page *page = pud_page(pud);
- kvm_flush_dcache_to_poc(page_address(page), PUD_SIZE);
- }
-}
-
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_level();
-}
-
-static inline unsigned long __kvm_idmap_ptrs_per_pgd(void)
-{
- return idmap_ptrs_per_pgd;
-}
-
-/*
- * Can't use pgd_populate here, because the extended idmap adds an extra level
- * above CONFIG_PGTABLE_LEVELS (which is 2 or 3 if we're using the extended
- * idmap), and pgd_populate is only available if CONFIG_PGTABLE_LEVELS = 4.
- */
-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;
- u64 pgd_addr;
-
- /*
- * 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]));
- pgd_addr = __phys_to_pgd_val(__pa(hyp_pgd));
- merged_hyp_pgd[0] = __pgd(pgd_addr | 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]));
- pgd_addr = __phys_to_pgd_val(__pa(boot_hyp_pgd));
- merged_hyp_pgd[idmap_idx] = __pgd(pgd_addr | PMD_TYPE_TABLE);
-}
-
static inline unsigned int kvm_get_vmid_bits(void)
{
int reg = read_sanitised_ftr_reg(SYS_ID_AA64MMFR1_EL1);
#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));
-}
-
static __always_inline u64 kvm_get_vttbr(struct kvm_s2_mmu *mmu)
{
struct kvm_vmid *vmid = &mmu->vmid;
git.samba.org / sfrench / cifs-2.6.git / blobdiff