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Re: [Xen-devel] [PATCH 09/11] x86: Fix merging of new status bits into %dr6

On Mon, Jun 04, 2018 at 02:59:13PM +0100, Andrew Cooper wrote:
> The current logic used to update %dr6 when injecting #DB is buggy.  The
> architectural behaviour is to overwrite B{0..3} (rather than accumulate) and
> accumulate all other bits.
> Introduce a new merge_dr6() helper, which also takes care of handing RTM
> correctly.
> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

Reviewed-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>

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