On Sat, 16 Feb 2008 14:34:09 +0100
Alexander Graf <[EMAIL PROTECTED]> wrote:
> > Whenever the register state becomes consistent with VT again.
> > vmx_set_segment() looks like the right point for turning it off.
>
> Sounds good. As basically the only problem we have are the sanity
> checks done on VMENTER, this should work.
Hello,
I tried to detect VMentry failure in order to do real mode emulation.
I tested the patch (pasted at the end of this message) with the
installation of OpenSuse 10.3 but it failed to detect the VMentry
failure. I suspect that on my computer the failure is not due to a
VMentry failure. Can you test the patch and tell me if it detects a
VMentry failure?
Thanks for your help,
Regards,
Guillaume
---
Index: kvm/arch/x86/kvm/vmx.c
===================================================================
--- kvm.orig/arch/x86/kvm/vmx.c 2008-02-18 09:22:53.000000000 +0100
+++ kvm/arch/x86/kvm/vmx.c 2008-02-18 09:43:13.000000000 +0100
@@ -2255,6 +2255,15 @@
static const int kvm_vmx_max_exit_handlers =
ARRAY_SIZE(kvm_vmx_exit_handlers);
+static int kvm_handle_vmentry_failure(struct kvm_run *kvm_run, struct kvm_vcpu
*vcpu)
+{
+ printk(KERN_WARNING "VMENTRY failure detected \n");
+ if (vcpu->arch.rmode.active)
+ printk(KERN_WARNING "Big Real Mode emulation needed \n");
+
+ return 0;
+}
+
/*
* The guest has exited. See if we can fix it or if we need userspace
* assistance.
@@ -2265,6 +2274,9 @@
struct vcpu_vmx *vmx = to_vmx(vcpu);
u32 vectoring_info = vmx->idt_vectoring_info;
+ if (unlikely(exit_reason & VMX_EXIT_REASONS_FAILED_VMENTRY))
+ return kvm_handle_vmentry_failure(kvm_run, vcpu);
+
if (unlikely(vmx->fail)) {
kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY;
kvm_run->fail_entry.hardware_entry_failure_reason
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