Re: [Xen-devel] VMX: emulated guest use SYSENTER MSRs

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

Since they are included in the VMCS, and read from there on save/restore,
the vmexit appears to be unnecessary.

 -- Keir

On 7/7/07 08:48, "Li, Xin B" <xin.b.li@xxxxxxxxx> wrote:

> 
>> What is the reason for not simply clearing the MSR bitmap bits
>> for these three MSRs, and rather handling the reads/writes in software?
> 
> I haven't checked those MSRs, the original concern is we need
> save/restore them when context switch, is this needed?
> 
> -Xin 
> 
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