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Re: [PATCH v1 1/2] x86/cpuid: Expose NullSelectorClearsBase CPUID bit to guests
- To: Jane Malalane <jane.malalane@xxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Mon, 6 Sep 2021 17:04:36 +0200
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- Cc: Wei Liu <wl@xxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Pu Wen <puwen@xxxxxxxx>, Andy Lutomirski <luto@xxxxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- Delivery-date: Mon, 06 Sep 2021 15:04:52 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 06.09.2021 14:00, Jane Malalane wrote:
> AMD Zen3 adds the NullSelectorClearsBase bit to indicate that loading
> a NULL segment selector zeroes the base and limit fields, as well as
> just attributes.
>
> Expose bit to all guests.
>
> Suggested-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
> Signed-off-by: Jane Malalane <jane.malalane@xxxxxxxxxx>
Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
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