On 11.06.2021 18:36, Andrew Cooper wrote:
> The logic to disallow writes to the TSC is out-of-place, and should be in
> check_resource_access() rather than in resource_access().
>
> Split the existing allow_access_msr() into two - msr_{read,write}_allowed() -
> and move all permissions checks here.
>
> Furthermore, guard access to MSR_IA32_CMT_{EVTSEL,CTR} to prohibit their use
> on hardware which is lacking the QoS Monitoring feature. Introduce
> cpu_has_pqe to help with the logic.
>
> Signed-off-by: Andrew Cooper <[email protected]>
Reviewed-by: Jan Beulich <[email protected]>
