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Subject[PATCH RFC 3/7] x86/kvm/mmu.c: add kvm_mmu parameter to kvm_mmu_free_roots()
Date
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>
---
arch/x86/include/asm/kvm_host.h | 2 +-
arch/x86/kvm/mmu.c | 7 +++----
2 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 2aa3c43ca5e5..d819947d0a97 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1282,7 +1282,7 @@ 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);
+void kvm_mmu_free_roots(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu);
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 10598dd396ed..8c5e5664d830 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -3358,11 +3358,10 @@ static void mmu_free_root_page(struct kvm *kvm, hpa_t *root_hpa,
*root_hpa = INVALID_PAGE;
}

-void kvm_mmu_free_roots(struct kvm_vcpu *vcpu)
+void kvm_mmu_free_roots(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu)
{
int i;
LIST_HEAD(invalid_list);
- struct kvm_mmu *mmu = vcpu->arch.mmu;

if (!VALID_PAGE(mmu->root_hpa))
return;
@@ -3954,7 +3953,7 @@ static void nonpaging_init_context(struct kvm_vcpu *vcpu,

void kvm_mmu_new_cr3(struct kvm_vcpu *vcpu)
{
- kvm_mmu_free_roots(vcpu);
+ kvm_mmu_free_roots(vcpu, vcpu->arch.mmu);
}

static unsigned long get_cr3(struct kvm_vcpu *vcpu)
@@ -4671,7 +4670,7 @@ EXPORT_SYMBOL_GPL(kvm_mmu_load);

void kvm_mmu_unload(struct kvm_vcpu *vcpu)
{
- kvm_mmu_free_roots(vcpu);
+ kvm_mmu_free_roots(vcpu, vcpu->arch.mmu);
WARN_ON(VALID_PAGE(vcpu->arch.mmu->root_hpa));
}
EXPORT_SYMBOL_GPL(kvm_mmu_unload);
--
2.14.4
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