> From: Kyle Huey [mailto:m...@kylehuey.com]
> Sent: Tuesday, October 18, 2016 2:51 AM
>
> On HVM guests, the cpuid triggers a vm exit, so we can check the emulated
> faulting state in vmx_do_cpuid and hvmemul_cpuid. A new function,
> hvm_check_cpuid_fault will check if cpuid faulting is enabled a
> From: Kyle Huey [mailto:m...@kylehuey.com]
> Sent: Tuesday, October 18, 2016 9:57 PM
>
> >> diff --git a/xen/arch/x86/hvm/emulate.c b/xen/arch/x86/hvm/emulate.c
> >> index 6ed7486..a713ff3 100644
> >> --- a/xen/arch/x86/hvm/emulate.c
> >> +++ b/xen/arch/x86/hvm/emulate.c
> >> @@ -1544,16 +1544,3
On Tue, Oct 18, 2016 at 3:09 AM, Andrew Cooper
wrote:
> On 17/10/16 19:51, Kyle Huey wrote:
>> diff --git a/xen/arch/x86/hvm/emulate.c b/xen/arch/x86/hvm/emulate.c
>> index 6ed7486..a713ff3 100644
>> --- a/xen/arch/x86/hvm/emulate.c
>> +++ b/xen/arch/x86/hvm/emulate.c
>> @@ -1544,16 +1544,35 @@ st
On Tue, Oct 18, 2016 at 1:29 AM, Tian, Kevin wrote:
>> From: Kyle Huey [mailto:m...@kylehuey.com]
>> Sent: Tuesday, October 18, 2016 2:51 AM
>>
>> On HVM guests, the cpuid triggers a vm exit, so we can check the emulated
>> faulting state in vmx_do_cpuid and hvmemul_cpuid. A new function,
>> hvm_c
On 17/10/16 19:51, Kyle Huey wrote:
> diff --git a/xen/arch/x86/hvm/emulate.c b/xen/arch/x86/hvm/emulate.c
> index 6ed7486..a713ff3 100644
> --- a/xen/arch/x86/hvm/emulate.c
> +++ b/xen/arch/x86/hvm/emulate.c
> @@ -1544,16 +1544,35 @@ static int hvmemul_wbinvd(
>
> static int hvmemul_cpuid(
>
> From: Kyle Huey [mailto:m...@kylehuey.com]
> Sent: Tuesday, October 18, 2016 2:51 AM
>
> On HVM guests, the cpuid triggers a vm exit, so we can check the emulated
> faulting state in vmx_do_cpuid and hvmemul_cpuid. A new function,
> hvm_check_cpuid_fault will check if cpuid faulting is enabled a
On HVM guests, the cpuid triggers a vm exit, so we can check the emulated
faulting state in vmx_do_cpuid and hvmemul_cpuid. A new function,
hvm_check_cpuid_fault will check if cpuid faulting is enabled and the CPL > 0.
When it returns true, the cpuid handling functions will inject a GP(0). Notably
