Re: [Xen-devel] [PATCH 1/6] x86: stop handling MSR_IA32_BNDCFGS 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 changes hvm_get/set_guest_bndcfgs() to check CPUID policy
> for the appropriate feature, rather than hardware, and also re-works
> the get/set_guest_bndcfgs() hvm_funcs so they are no longer boolean.
> Uses
> of u64 are also converted to uint64_t.
> 
> NOTE: Because vmx_get/set_guest_bndcfgs() call vmx_vmcs_enter(), the
>       struct vcpu pointer passed in cannot be const.
> 
> Signed-off-by: Paul Durrant <paul.durrant@xxxxxxxxxx>

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