On 2/11/21 2:56 AM, Paolo Bonzini wrote:
> On 29/01/21 01:43, Babu Moger wrote:
>> This support also fixes an issue where a guest may sometimes see an
>> inconsistent value for the SPEC_CTRL MSR on processors that support this
>> feature. With the current SPEC_CTRL support, the first write to
On 29/01/21 01:43, Babu Moger wrote:
This support also fixes an issue where a guest may sometimes see an
inconsistent value for the SPEC_CTRL MSR on processors that support this
feature. With the current SPEC_CTRL support, the first write to
SPEC_CTRL is intercepted and the virtualized version
Newer AMD processors have a feature to virtualize the use of the
SPEC_CTRL MSR. Presence of this feature is indicated via CPUID
function 0x800A_EDX[20]: GuestSpecCtrl. Hypervisors are not
required to enable this feature since it is automatically enabled on
processors that support it.
A
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