Now that KVM injects #UD on "unhandlable" error, it makes better sense to
return such error on sysenter instead of directly injecting #UD to the guest.
This allows to track more easily the unhandlable cases the emulator does not
support.
Signed-off-by: Nadav Amit <na...@cs.technion.ac.il>
---
arch/x86/kvm/emulate.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 84a83dc..7892c76 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -2339,11 +2339,9 @@ static int em_sysenter(struct x86_emulate_ctxt *ctxt)
&& !vendor_intel(ctxt))
return emulate_ud(ctxt);
- /* XXX sysenter/sysexit have not been tested in 64bit mode.
- * Therefore, we inject an #UD.
- */
+ /* sysenter/sysexit have not been tested in 64bit mode. */
if (ctxt->mode == X86EMUL_MODE_PROT64)
- return emulate_ud(ctxt);
+ return X86EMUL_UNHANDLEABLE;
setup_syscalls_segments(ctxt, &cs, &ss);
--
1.9.1
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