| Message ID | 20240329225835.400662-17-michael.roth@amd.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Delegated to: | Herbert Xu |
| Headers | show |
| Series | Add AMD Secure Nested Paging (SEV-SNP) Hypervisor Support | expand |
On 3/29/24 23:58, Michael Roth wrote: > From: Brijesh Singh <brijesh.singh@amd.com> > > While resolving the RMP page fault, there may be cases where the page > level between the RMP entry and TDP does not match and the 2M RMP entry > must be split into 4K RMP entries. Or a 2M TDP page need to be broken > into multiple of 4K pages. > > To keep the RMP and TDP page level in sync, zap the gfn range after > splitting the pages in the RMP entry. The zap should force the TDP to > gets rebuilt with the new page level. Just squash this in patch 17. Paolo > Signed-off-by: Brijesh Singh <brijesh.singh@amd.com> > Signed-off-by: Ashish Kalra <ashish.kalra@amd.com> > Signed-off-by: Michael Roth <michael.roth@amd.com> > --- > arch/x86/include/asm/kvm_host.h | 1 + > arch/x86/kvm/mmu.h | 2 -- > arch/x86/kvm/mmu/mmu.c | 1 + > 3 files changed, 2 insertions(+), 2 deletions(-) > > diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h > index a3f8eba8d8b6..49b294a8d917 100644 > --- a/arch/x86/include/asm/kvm_host.h > +++ b/arch/x86/include/asm/kvm_host.h > @@ -1950,6 +1950,7 @@ void kvm_mmu_slot_leaf_clear_dirty(struct kvm *kvm, > const struct kvm_memory_slot *memslot); > void kvm_mmu_invalidate_mmio_sptes(struct kvm *kvm, u64 gen); > void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned long kvm_nr_mmu_pages); > +void kvm_zap_gfn_range(struct kvm *kvm, gfn_t gfn_start, gfn_t gfn_end); > > int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3); > > diff --git a/arch/x86/kvm/mmu.h b/arch/x86/kvm/mmu.h > index 2c54ba5b0a28..89da37be241a 100644 > --- a/arch/x86/kvm/mmu.h > +++ b/arch/x86/kvm/mmu.h > @@ -253,8 +253,6 @@ static inline bool kvm_mmu_honors_guest_mtrrs(struct kvm *kvm) > return __kvm_mmu_honors_guest_mtrrs(kvm_arch_has_noncoherent_dma(kvm)); > } > > -void kvm_zap_gfn_range(struct kvm *kvm, gfn_t gfn_start, gfn_t gfn_end); > - > int kvm_arch_write_log_dirty(struct kvm_vcpu *vcpu); > > int kvm_mmu_post_init_vm(struct kvm *kvm); > diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c > index 0049d49aa913..c5af52e3f0c5 100644 > --- a/arch/x86/kvm/mmu/mmu.c > +++ b/arch/x86/kvm/mmu/mmu.c > @@ -6772,6 +6772,7 @@ static bool kvm_mmu_zap_collapsible_spte(struct kvm *kvm, > > return need_tlb_flush; > } > +EXPORT_SYMBOL_GPL(kvm_zap_gfn_range); > > static void kvm_rmap_zap_collapsible_sptes(struct kvm *kvm, > const struct kvm_memory_slot *slot)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index a3f8eba8d8b6..49b294a8d917 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -1950,6 +1950,7 @@ void kvm_mmu_slot_leaf_clear_dirty(struct kvm *kvm, const struct kvm_memory_slot *memslot); void kvm_mmu_invalidate_mmio_sptes(struct kvm *kvm, u64 gen); void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned long kvm_nr_mmu_pages); +void kvm_zap_gfn_range(struct kvm *kvm, gfn_t gfn_start, gfn_t gfn_end); int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3); diff --git a/arch/x86/kvm/mmu.h b/arch/x86/kvm/mmu.h index 2c54ba5b0a28..89da37be241a 100644 --- a/arch/x86/kvm/mmu.h +++ b/arch/x86/kvm/mmu.h @@ -253,8 +253,6 @@ static inline bool kvm_mmu_honors_guest_mtrrs(struct kvm *kvm) return __kvm_mmu_honors_guest_mtrrs(kvm_arch_has_noncoherent_dma(kvm)); } -void kvm_zap_gfn_range(struct kvm *kvm, gfn_t gfn_start, gfn_t gfn_end); - int kvm_arch_write_log_dirty(struct kvm_vcpu *vcpu); int kvm_mmu_post_init_vm(struct kvm *kvm); diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index 0049d49aa913..c5af52e3f0c5 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -6772,6 +6772,7 @@ static bool kvm_mmu_zap_collapsible_spte(struct kvm *kvm, return need_tlb_flush; } +EXPORT_SYMBOL_GPL(kvm_zap_gfn_range); static void kvm_rmap_zap_collapsible_sptes(struct kvm *kvm, const struct kvm_memory_slot *slot)