Re: [Xen-devel] [PATCH v2] x86/vPMU: constrain MSR_IA32_DS_AREA loads

[Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>]

On 12/18/2015 11:51 AM, Jan Beulich wrote:
> For one, loading the MSR with a possibly non-canonical address was
> possible since the verification is conditional, while the MSR load
> wasn't. And then for PV guests we need to further limit the range of
> valid addresses to exclude the hypervisor range.
>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
> ---
> v2: Also alter the MSR write check, in anticipation of it becoming
>      accessible by PV guests eventually.
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>



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