Re: [Xen-devel] Issue in MPX support in Xen

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 26.08.16 at 10:09, <JBeulich@xxxxxxxx> wrote:
>>>> On 25.08.16 at 18:53, <dmitry.rockosov@xxxxxxxxx> wrote:
>> We are working on enabling XEN with WindRiver Simics, which is Intel 
>> reference functional simulator for servers.
>> 
>> We found the issue in XEN with MPX using.
>> If MPX is supported by CPUID, but MPX is not supported by VMX, XEN is 
>> failing on store CPU MSR GUEST_BNDCFGS (file 
>> xen-4.7.0/xen/arch/x86/hvm/vmx/vmx.c:798).
>> 
>> SDM says in 24.4.1 Guest Register State:
>> IA32_BNDCFGS (64 bits). This field is supported only on processors that 
>> support either the 1-setting of the
>> "load IA32_BNDCFGS" VM-entry control or that of the "clear IA32_BNDCFGS" 
>> VM-exit control.
>> 
>> Looks like XEN doesn't consult VM-entry control or VM-exit control listed in 
>> SDM.
> 
> Could you give the attached patch a try? It's against -unstable and
> will require trivial adjustment to two of the vmx.c hunks in order to
> apply to 4.7.

Ping?

Jan


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
https://lists.xen.org/xen-devel