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authorJoerg Roedel <joerg.roedel@amd.com>2010-09-10 15:30:56 (GMT)
committerAvi Kivity <avi@redhat.com>2010-10-24 08:52:41 (GMT)
commitd47f00a62b2e14b4a811b87bdb9ea1809693a377 (patch)
tree85f0697d0714818c8f0d92047905782f275c9ce3 /arch/x86
parentd4f8cf664e4c1fd579df6b6e6378335c9f79d790 (diff)
downloadlinux-fsl-qoriq-d47f00a62b2e14b4a811b87bdb9ea1809693a377.tar.xz
KVM: X86: Propagate fetch faults
KVM currently ignores fetch faults in the instruction emulator. With nested-npt we could have such faults. This patch adds the code to handle these. 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/kvm/emulate.c3
-rw-r--r--arch/x86/kvm/x86.c4
2 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 2b08b78..aead72e 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -1198,6 +1198,9 @@ static int emulate_popf(struct x86_emulate_ctxt *ctxt,
*(unsigned long *)dest =
(ctxt->eflags & ~change_mask) | (val & change_mask);
+ if (rc == X86EMUL_PROPAGATE_FAULT)
+ emulate_pf(ctxt);
+
return rc;
}
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 0281d92..3101060 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -4247,6 +4247,9 @@ int emulate_instruction(struct kvm_vcpu *vcpu,
vcpu->arch.emulate_ctxt.perm_ok = false;
r = x86_decode_insn(&vcpu->arch.emulate_ctxt);
+ if (r == X86EMUL_PROPAGATE_FAULT)
+ goto done;
+
trace_kvm_emulate_insn_start(vcpu);
/* Only allow emulation of specific instructions on #UD
@@ -4305,6 +4308,7 @@ restart:
return handle_emulation_failure(vcpu);
}
+done:
if (vcpu->arch.emulate_ctxt.exception >= 0) {
inject_emulated_exception(vcpu);
r = EMULATE_DONE;