Return X86EMUL_PROPAGATE_FAULT is fault was injected. Also inject #UD
for those instruction when appropriate.
Signed-off-by: Gleb Natapov <gleb@xxxxxxxxxx>
---
arch/x86/kvm/emulate.c | 17 +++++++++++------
1 files changed, 11 insertions(+), 6 deletions(-)
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 5afddcf..1393bf0 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -1600,8 +1600,11 @@ emulate_syscall(struct x86_emulate_ctxt *ctxt)
u64 msr_data;
/* syscall is not available in real mode */
- if (ctxt->mode == X86EMUL_MODE_REAL || ctxt->mode == X86EMUL_MODE_VM86)
- return X86EMUL_UNHANDLEABLE;
+ if (ctxt->mode == X86EMUL_MODE_REAL ||
+ ctxt->mode == X86EMUL_MODE_VM86) {
+ kvm_queue_exception(ctxt->vcpu, UD_VECTOR);
+ return X86EMUL_PROPAGATE_FAULT;
+ }
setup_syscalls_segments(ctxt, &cs, &ss);
@@ -1651,14 +1654,16 @@ emulate_sysenter(struct x86_emulate_ctxt *ctxt)
/* inject #GP if in real mode */
if (ctxt->mode == X86EMUL_MODE_REAL) {
kvm_inject_gp(ctxt->vcpu, 0);
- return X86EMUL_UNHANDLEABLE;
+ return X86EMUL_PROPAGATE_FAULT;
}
/* XXX sysenter/sysexit have not been tested in 64bit mode.
* Therefore, we inject an #UD.
*/
- if (ctxt->mode == X86EMUL_MODE_PROT64)
- return X86EMUL_UNHANDLEABLE;
+ if (ctxt->mode == X86EMUL_MODE_PROT64) {
+ kvm_queue_exception(ctxt->vcpu, UD_VECTOR);
+ return X86EMUL_PROPAGATE_FAULT;
+ }
setup_syscalls_segments(ctxt, &cs, &ss);
@@ -1713,7 +1718,7 @@ emulate_sysexit(struct x86_emulate_ctxt *ctxt)
if (ctxt->mode == X86EMUL_MODE_REAL ||
ctxt->mode == X86EMUL_MODE_VM86) {
kvm_inject_gp(ctxt->vcpu, 0);
- return X86EMUL_UNHANDLEABLE;
+ return X86EMUL_PROPAGATE_FAULT;
}
setup_syscalls_segments(ctxt, &cs, &ss);
--
1.6.5
--
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