Re: [kvm-devel] Where are vmentry failure caugth?

[Guillaume T. <gui...@ex...>]

On Thu, 10 Jan 2008 11:19:58 +0100
Guillaume Thouvenin <gui...@ex...> wrote:

>   I tried but it didn't catch any vmentry failures (and I know that
> there is at least one during the test).

  I think that there is a vmentry failure because qemu-system-x86_64
crashes with following error:
"exception 13 (33)"

  I interpreted this as a vmentry failure because 33 is the exit reason
for a vmentry failure. The problem is that I don't find how to catch it
in kvm. I thought that something like:

static int 
kvm_handle_exit(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
{ 
  u32 exit_reason = vmcs_read32(VM_EXIT_REASON); 
  struct vcpu_vmx *vmx = to_vmx(vcpu); 
  u32 vectoring_info = vmx->idt_vectoring_info;

  if ( unlikely(exit_reason & VMX_EXIT_REASONS_FAILED_VMENTRY) )
  // I should get it here no?
  ...
}

but exit_reason is never equal to VMX_EXIT_REASONS_FAILED_VMENTRY. Does
it mean that what I interpret as a vmentry failure due to invalid guest
state is in fact due to something else.

Any hints to catch the vmentry failure due to invalid guest state in
kvm?

Thanks,
Guillaume