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| author | Joerg Roedel <joerg.roedel@amd.com> | 2010-09-10 17:30:55 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2010-10-24 10:52:40 +0200 |
| commit | d4f8cf664e4c1fd579df6b6e6378335c9f79d790 (patch) | |
| tree | e5f5ce71daa78ebf2bae27d355f1e9a11d59ef77 /arch/x86 | |
| parent | 02f59dc9f1f51d2148d87d48f84adb455a4fd697 (diff) | |
| download | linux-d4f8cf664e4c1fd579df6b6e6378335c9f79d790.tar.bz2 | |
KVM: MMU: Propagate the right fault back to the guest after gva_to_gpa
This patch implements logic to make sure that either a
page-fault/page-fault-vmexit or a nested-page-fault-vmexit
is propagated back to the guest.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/include/asm/kvm_host.h | 1 | ||||
| -rw-r--r-- | arch/x86/kvm/x86.c | 18 |
2 files changed, 18 insertions, 1 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 08bc383083ff..574db6d1532a 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -660,6 +660,7 @@ void kvm_inject_page_fault(struct kvm_vcpu *vcpu); int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, gfn_t gfn, void *data, int offset, int len, u32 access); +void kvm_propagate_fault(struct kvm_vcpu *vcpu); bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl); int kvm_pic_set_irq(void *opaque, int irq, int level); diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index e4c76bf86081..0281d920e9ed 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -338,6 +338,22 @@ void kvm_inject_page_fault(struct kvm_vcpu *vcpu) kvm_queue_exception_e(vcpu, PF_VECTOR, error_code); } +void kvm_propagate_fault(struct kvm_vcpu *vcpu) +{ + u32 nested, error; + + error = vcpu->arch.fault.error_code; + nested = error & PFERR_NESTED_MASK; + error = error & ~PFERR_NESTED_MASK; + + vcpu->arch.fault.error_code = error; + + if (mmu_is_nested(vcpu) && !nested) + vcpu->arch.nested_mmu.inject_page_fault(vcpu); + else + vcpu->arch.mmu.inject_page_fault(vcpu); +} + void kvm_inject_nmi(struct kvm_vcpu *vcpu) { vcpu->arch.nmi_pending = 1; @@ -4140,7 +4156,7 @@ static void inject_emulated_exception(struct kvm_vcpu *vcpu) { struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; if (ctxt->exception == PF_VECTOR) - kvm_inject_page_fault(vcpu); + kvm_propagate_fault(vcpu); else if (ctxt->error_code_valid) kvm_queue_exception_e(vcpu, ctxt->exception, ctxt->error_code); else |