void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned long kvm_nr_mmu_pages);
int load_pdptrs(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, unsigned long cr3);
-bool pdptrs_changed(struct kvm_vcpu *vcpu);
int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
const void *val, int bytes);
}
EXPORT_SYMBOL_GPL(kvm_read_guest_page_mmu);
-static int kvm_read_nested_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn,
- void *data, int offset, int len, u32 access)
-{
- return kvm_read_guest_page_mmu(vcpu, vcpu->arch.walk_mmu, gfn,
- data, offset, len, access);
-}
-
static inline u64 pdptr_rsvd_bits(struct kvm_vcpu *vcpu)
{
return vcpu->arch.reserved_gpa_bits | rsvd_bits(5, 8) | rsvd_bits(1, 2);
}
EXPORT_SYMBOL_GPL(load_pdptrs);
-bool pdptrs_changed(struct kvm_vcpu *vcpu)
-{
- u64 pdpte[ARRAY_SIZE(vcpu->arch.walk_mmu->pdptrs)];
- int offset;
- gfn_t gfn;
- int r;
-
- if (!is_pae_paging(vcpu))
- return false;
-
- if (!kvm_register_is_available(vcpu, VCPU_EXREG_PDPTR))
- return true;
-
- gfn = (kvm_read_cr3(vcpu) & 0xffffffe0ul) >> PAGE_SHIFT;
- offset = (kvm_read_cr3(vcpu) & 0xffffffe0ul) & (PAGE_SIZE - 1);
- r = kvm_read_nested_guest_page(vcpu, gfn, pdpte, offset, sizeof(pdpte),
- PFERR_USER_MASK | PFERR_WRITE_MASK);
- if (r < 0)
- return true;
-
- return memcmp(pdpte, vcpu->arch.walk_mmu->pdptrs, sizeof(pdpte)) != 0;
-}
-EXPORT_SYMBOL_GPL(pdptrs_changed);
-
void kvm_post_set_cr0(struct kvm_vcpu *vcpu, unsigned long old_cr0, unsigned long cr0)
{
unsigned long update_bits = X86_CR0_PG | X86_CR0_WP;
}
#endif
- if (cr3 == kvm_read_cr3(vcpu) && !pdptrs_changed(vcpu)) {
+ /* PDPTRs are always reloaded for PAE paging. */
+ if (cr3 == kvm_read_cr3(vcpu) && !is_pae_paging(vcpu)) {
if (!skip_tlb_flush) {
kvm_mmu_sync_roots(vcpu);
kvm_make_request(KVM_REQ_TLB_FLUSH_CURRENT, vcpu);