Re: [Xen-devel] [PATCH 2/6] x86/hvm: Handle viridian MSRs via the new guest_{rd, wr}msr() infrastructure

["Tian, Kevin" <kevin.tian@xxxxxxxxx>]

> From: Andrew Cooper [mailto:andrew.cooper3@xxxxxxxxxx]
> Sent: Tuesday, February 27, 2018 1:35 AM
> 
> Dispatch from the guest_{rd,wr}msr() functions, after confirming that the
> domain is configured to use viridian.  This allows for simplifiction of the
> viridian helpers as they don't need to cope with the "not a viridian MSR"
> case.  It also means that viridian MSRs which are unimplemented, or
> excluded
> because of features, don't fall back into default handling path.
> 
> Rename {rd,wr}msr_viridian_regs() to guest_{rd,wr}msr_viridian() for
> consistency, and because the _regs suffix isn't very appropriate.
> 
> Update them to take a vcpu pointer rather than presuming that they act on
> current, which is safe for all implemented operations.  Also update them to
> use X86EMUL_* return values.
> 
> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>
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