x86/kvm/mmu.c: add kvm_mmu parameter to kvm_mmu_free_roots()

Add an option to specify which MMU root we want to free. This will
be used when nested and non-nested MMUs for L1 are split.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Sean Christopherson <sean.j.christopherson@intel.com>

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 5e8f1a0..586ef14 100644 (file)
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1339,7 +1339,8 @@ void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
 int kvm_mmu_load(struct kvm_vcpu *vcpu);
 void kvm_mmu_unload(struct kvm_vcpu *vcpu);
 void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu);
-void kvm_mmu_free_roots(struct kvm_vcpu *vcpu, ulong roots_to_free);
+void kvm_mmu_free_roots(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu,
+                       ulong roots_to_free);
 gpa_t translate_nested_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access,
                           struct x86_exception *exception);
 gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva,

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 5b14dcb..96c7537 100644 (file)
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -3480,11 +3480,11 @@ static void mmu_free_root_page(struct kvm *kvm, hpa_t *root_hpa,
 }
 
 /* roots_to_free must be some combination of the KVM_MMU_ROOT_* flags */
-void kvm_mmu_free_roots(struct kvm_vcpu *vcpu, ulong roots_to_free)
+void kvm_mmu_free_roots(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu,
+                       ulong roots_to_free)
 {
        int i;
        LIST_HEAD(invalid_list);
-       struct kvm_mmu *mmu = vcpu->arch.mmu;
        bool free_active_root = roots_to_free & KVM_MMU_ROOT_CURRENT;
 
        BUILD_BUG_ON(KVM_MMU_NUM_PREV_ROOTS >= BITS_PER_LONG);
@@ -4200,7 +4200,8 @@ static void __kvm_mmu_new_cr3(struct kvm_vcpu *vcpu, gpa_t new_cr3,
                              bool skip_tlb_flush)
 {
        if (!fast_cr3_switch(vcpu, new_cr3, new_role, skip_tlb_flush))
-               kvm_mmu_free_roots(vcpu, KVM_MMU_ROOT_CURRENT);
+               kvm_mmu_free_roots(vcpu, vcpu->arch.mmu,
+                                  KVM_MMU_ROOT_CURRENT);
 }
 
 void kvm_mmu_new_cr3(struct kvm_vcpu *vcpu, gpa_t new_cr3, bool skip_tlb_flush)
@@ -4981,7 +4982,7 @@ EXPORT_SYMBOL_GPL(kvm_mmu_load);
 
 void kvm_mmu_unload(struct kvm_vcpu *vcpu)
 {
-       kvm_mmu_free_roots(vcpu, KVM_MMU_ROOTS_ALL);
+       kvm_mmu_free_roots(vcpu, vcpu->arch.mmu, KVM_MMU_ROOTS_ALL);
        WARN_ON(VALID_PAGE(vcpu->arch.mmu->root_hpa));
 }
 EXPORT_SYMBOL_GPL(kvm_mmu_unload);

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index fa7e462..a0c3992 100644 (file)
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -9127,7 +9127,7 @@ static int handle_invpcid(struct kvm_vcpu *vcpu)
                            == operand.pcid)
                                roots_to_free |= KVM_MMU_ROOT_PREVIOUS(i);
 
-               kvm_mmu_free_roots(vcpu, roots_to_free);
+               kvm_mmu_free_roots(vcpu, vcpu->arch.mmu, roots_to_free);
                /*
                 * If neither the current cr3 nor any of the prev_roots use the
                 * given PCID, then nothing needs to be done here because a