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Signed-off-by: Ashish Kalra --- arch/x86/include/asm/kvm_host.h | 1 + arch/x86/kvm/svm/sev.c | 35 +++++++++++++++++++++++++++++++++ arch/x86/kvm/svm/svm.c | 1 + arch/x86/kvm/svm/svm.h | 1 + arch/x86/kvm/x86.c | 5 +++++ 5 files changed, 43 insertions(+) diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index fc74144d5ab0..b573ea85b57e 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -1254,6 +1254,7 @@ struct kvm_x86_ops { bool (*apic_init_signal_blocked)(struct kvm_vcpu *vcpu); int (*enable_direct_tlbflush)(struct kvm_vcpu *vcpu); + void (*commit_memory_region)(struct kvm *kvm, enum kvm_mr_change change); int (*page_enc_status_hc)(struct kvm *kvm, unsigned long gpa, unsigned long sz, unsigned long mode); int (*get_page_enc_bitmap)(struct kvm *kvm, diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c index 30efc1068707..c0d7043a0627 100644 --- a/arch/x86/kvm/svm/sev.c +++ b/arch/x86/kvm/svm/sev.c @@ -1377,6 +1377,41 @@ static int sev_resize_page_enc_bitmap(struct kvm *kvm, unsigned long new_size) return 0; } +void svm_commit_memory_region(struct kvm *kvm, enum kvm_mr_change change) +{ + struct kvm_memslots *slots; + struct kvm_memory_slot *memslot; + gfn_t start, end = 0; + + spin_lock(&kvm->mmu_lock); + if (change == KVM_MR_CREATE) { + slots = kvm_memslots(kvm); + kvm_for_each_memslot(memslot, slots) { + start = memslot->base_gfn; + end = memslot->base_gfn + memslot->npages; + /* + * KVM memslots is a sorted list, starting with + * the highest mapped guest PA, so pick the topmost + * valid guest PA. + */ + if (memslot->npages) + break; + } + } + spin_unlock(&kvm->mmu_lock); + + if (end) { + /* + * NORE: This callback is invoked in vm ioctl + * set_user_memory_region, hence we can use a + * mutex here. + */ + mutex_lock(&kvm->lock); + sev_resize_page_enc_bitmap(kvm, end); + mutex_unlock(&kvm->lock); + } +} + int svm_page_enc_status_hc(struct kvm *kvm, unsigned long gpa, unsigned long npages, unsigned long enc) { diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c index 501e82f5593c..442adbbb0641 100644 --- a/arch/x86/kvm/svm/svm.c +++ b/arch/x86/kvm/svm/svm.c @@ -4015,6 +4015,7 @@ static struct kvm_x86_ops svm_x86_ops __initdata = { .check_nested_events = svm_check_nested_events, + .commit_memory_region = svm_commit_memory_region, .page_enc_status_hc = svm_page_enc_status_hc, .get_page_enc_bitmap = svm_get_page_enc_bitmap, .set_page_enc_bitmap = svm_set_page_enc_bitmap, diff --git a/arch/x86/kvm/svm/svm.h b/arch/x86/kvm/svm/svm.h index 2ebdcce50312..fd99e0a5417a 100644 --- a/arch/x86/kvm/svm/svm.h +++ b/arch/x86/kvm/svm/svm.h @@ -406,6 +406,7 @@ int svm_page_enc_status_hc(struct kvm *kvm, unsigned long gpa, unsigned long npages, unsigned long enc); int svm_get_page_enc_bitmap(struct kvm *kvm, struct kvm_page_enc_bitmap *bmap); int svm_set_page_enc_bitmap(struct kvm *kvm, struct kvm_page_enc_bitmap *bmap); +void svm_commit_memory_region(struct kvm *kvm, enum kvm_mr_change change); /* avic.c */ diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index c4166d7a0493..8938de868d42 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -10133,6 +10133,11 @@ void kvm_arch_commit_memory_region(struct kvm *kvm, kvm_mmu_change_mmu_pages(kvm, kvm_mmu_calculate_default_mmu_pages(kvm)); + if (change == KVM_MR_CREATE || change == KVM_MR_DELETE) { + if (kvm_x86_ops.commit_memory_region) + kvm_x86_ops.commit_memory_region(kvm, change); + } + /* * Dirty logging tracks sptes in 4k granularity, meaning that large * sptes have to be split. If live migration is successful, the guest -- 2.17.1