linux-kernel - Re: [PATCH v12 00/10] Introduce support for guest CET feature

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Message-ID: <20200610165635.GB18790@linux.intel.com>
Date:   Wed, 10 Jun 2020 09:56:36 -0700
From:   Sean Christopherson <sean.j.christopherson@...el.com>
To:     Yang Weijiang <weijiang.yang@...el.com>
Cc:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        pbonzini@...hat.com, jmattson@...gle.com,
        yu.c.zhang@...ux.intel.com
Subject: Re: [PATCH v12 00/10] Introduce support for guest CET feature

On Wed, May 06, 2020 at 04:20:59PM +0800, Yang Weijiang wrote:
> Several parts in KVM have been updated to provide VM CET support, including:
> CPUID/XSAVES config, MSR pass-through, user space MSR access interface, 
> vmentry/vmexit config, nested VM etc. These patches have dependency on CET
> kernel patches for xsaves support and CET definitions, e.g., MSR and related
> feature flags.

Other than the MSR and cpufeatures flags definitions, is there any direct
dependency on kernel CET support?  I.e. if/when XSAVES support is merged,
is there anything beyond the architectural definitions that are required to
merge KVM CET virtualization?