Re: [Xen-devel] [PATCH 4/6] x86: stop handling MSR_IA32_XSS save/restore in implementation code

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

> From: Paul Durrant [mailto:paul.durrant@xxxxxxxxxx]
> Sent: Monday, January 7, 2019 8:03 PM
> 
> Saving and restoring the value of this MSR is currently handled by
> implementation-specific code despite it being architectural. This patch
> moves handling of accesses to this MSR from hvm.c into the msr.c, thus
> allowing the common MSR save/restore code to handle it.
> 
> This patch also adds proper checks of CPUID policy in the new get/set code.
> 
> NOTE: MSR_IA32_XSS is the last MSR to be saved and restored by
>       implementation-specific code. This patch therefore removes the
>       (VMX) definitions and of the init_msr(), save_msr() and
>       load_msr() hvm_funcs, as they are no longer necessary. The
>       declarations of and calls to those hvm_funcs will be cleaned up
>       by a subsequent patch.
> 
> Signed-off-by: Paul Durrant <paul.durrant@xxxxxxxxxx>

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