Re: [PATCH v2 2/6] x86/fpu/xstate: Add CET supervisor mode state support

[Chao Gao]

On Tue, Mar 04, 2025 at 02:26:01PM -0800, Dave Hansen wrote:
>On 11/26/24 02:17, Chao Gao wrote:
>...
>> The alternative is to enable it in KVM domain, but KVM maintainers NAKed
>> the solution. The external discussion can be found at [*], it ended up
>> with adding the support in kernel instead of KVM domain.
>So, there's a lot of changelog here, but scant details.

Let me refine the changelog to ensure it's clear and concise and includes all
necessary details.

>
>This patch enables XFEATURE_CET_KERNEL everywhere it's available, right?

Yes

>So, this patch at least wastes the XSAVE buffer space and doesn't
>actually get anything. Right?

Yes