Re: [Xen-devel] [PATCH v4 10/24] x86/emul: Always use fault semantics for software events

[Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>]

On 12/01/2016 11:55 AM, Andrew Cooper wrote:
> The common case is already using fault semantics out of x86_emulate(), as that
> is how VT-x/SVM expects to inject the event (given suitable hardware support).
>
> However, x86_emulate() returning X86EMUL_EXCEPTION and also completing a
> register writeback is problematic for callers.
>
> Switch the logic to always using fault semantics, and leave svm_inject_trap()
> to fix up %eip if necessary.
>
> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

Reviewed-by:  Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>


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