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| author | Joerg Roedel <joerg.roedel@amd.com> | 2010-09-10 17:30:54 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2010-10-24 10:52:39 +0200 |
| commit | 02f59dc9f1f51d2148d87d48f84adb455a4fd697 (patch) | |
| tree | f1947e95af0dd4e2211c1b152e48f9784a749ebb /arch/x86/kvm/x86.c | |
| parent | 3d06b8bfd44ec421c386241f7c5af66c8200cbf4 (diff) | |
| download | lwn-02f59dc9f1f51d2148d87d48f84adb455a4fd697.tar.gz lwn-02f59dc9f1f51d2148d87d48f84adb455a4fd697.zip | |
KVM: MMU: Introduce init_kvm_nested_mmu()
This patch introduces the init_kvm_nested_mmu() function
which is used to re-initialize the nested mmu when the l2
guest changes its paging mode.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86/kvm/x86.c')
| -rw-r--r-- | arch/x86/kvm/x86.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 46843ed36dc1..e4c76bf86081 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -3489,6 +3489,22 @@ static gpa_t translate_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access) return gpa; } +static gpa_t translate_nested_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access) +{ + gpa_t t_gpa; + u32 error; + + BUG_ON(!mmu_is_nested(vcpu)); + + /* NPT walks are always user-walks */ + access |= PFERR_USER_MASK; + t_gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, gpa, access, &error); + if (t_gpa == UNMAPPED_GVA) + vcpu->arch.fault.error_code |= PFERR_NESTED_MASK; + + return t_gpa; +} + gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, u32 *error) { u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; @@ -5704,6 +5720,7 @@ int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) vcpu->arch.walk_mmu = &vcpu->arch.mmu; vcpu->arch.mmu.root_hpa = INVALID_PAGE; vcpu->arch.mmu.translate_gpa = translate_gpa; + vcpu->arch.nested_mmu.translate_gpa = translate_nested_gpa; if (!irqchip_in_kernel(kvm) || kvm_vcpu_is_bsp(vcpu)) vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; else |