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Re: [PATCH v2 2/4] x86/msr: Split MSR_SPEC_CTRL handling
- To: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Wed, 19 Jan 2022 14:30:49 +0100
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- Cc: Roger Pau Monné <roger.pau@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- Delivery-date: Wed, 19 Jan 2022 13:30:57 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 17.01.2022 19:34, Andrew Cooper wrote:
> In order to fix a VT-x bug, and support MSR_SPEC_CTRL on AMD, move
> MSR_SPEC_CTRL handling into the new {get,set}_reg() infrastructure.
>
> Duplicate the msrs->spec_ctrl.raw accesses in the PV and VT-x paths for now.
> The SVM path is currently unreachable because of the CPUID policy.
>
> No functional change.
>
> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
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