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

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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