Re: [Xen-devel] [PATCH v5 1/4] x86emul: conditionally clear BNDn for branches

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 12/01/17 14:15, Jan Beulich wrote:
> Considering that we surface MPX to HVM guests, instructions we emulate
> should also correctly deal with MPX state. While for now BND*
> instructions don't get emulated, the effect of branches (which we do
> emulate) without BND prefix should be taken care of.
>
> No need to alter XABORT behavior: While not mentioned in the SDM so
> far, this restores BNDn as they were at the XBEGIN, and since we make
> XBEGIN abort right away, XABORT in the emulator is only a no-op.
>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

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