Re: [PATCH] x86/pv: Make the PV default WRMSR path match the HVM default

[Jan Beulich <jbeulich@xxxxxxxx>]

On 23.07.2020 20:26, Andrew Cooper wrote:
> The current HVM default for writes to unknown MSRs is to inject #GP if the MSR
> is unreadable, and discard writes otherwise. While this behaviour isn't great,
> the PV default is even worse, because it swallows writes even to non-readable
> MSRs.  i.e. A PV guest doesn't even get a #GP fault for a write to a totally
> bogus index.
> 
> Update PV to make it consistent with HVM, which will simplify the task of
> making other improvements to the default MSR behaviour.
> 
> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>