Re: [RFC PATCH v3 53/59] KVM: x86: Add a helper function to restore 4 host MSRs on exit to user space

Subject: Re: [RFC PATCH v3 53/59] KVM: x86: Add a helper function to restore 4 host MSRs on exit to user space
From: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Date: Fri, 26 Nov 2021 10:40:16 +0100
Cc: isaku.yamahata@xxxxxxxxx, Ingo Molnar <mingo@xxxxxxxxxx>, Borislav Petkov <bp@xxxxxxxxx>, "H . Peter Anvin" <hpa@xxxxxxxxx>, Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>, Wanpeng Li <wanpengli@xxxxxxxxxxx>, Jim Mattson <jmattson@xxxxxxxxxx>, Joerg Roedel <joro@xxxxxxxxxx>, erdemaktas@xxxxxxxxxx, Connor Kuehl <ckuehl@xxxxxxxxxx>, Sean Christopherson <seanjc@xxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, kvm@xxxxxxxxxxxxxxx, isaku.yamahata@xxxxxxxxx
In-reply-to: <20211126091913.GA11523@gao-cwp>
References: <cover.1637799475.git.isaku.yamahata@intel.com> <4ede5c987a4ae938a37ab7fe70d5e1d561ee97d4.1637799475.git.isaku.yamahata@intel.com> <878rxcht3g.ffs@tglx> <20211126091913.GA11523@gao-cwp>
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On 11/26/21 10:19, Chao Gao wrote:

Of course. Will remove all "later patch" phrases.

Chao, see my comment on patch 54, for how to do this. In this case,this patch would be right before the one that enables KVM_RUN on a TDXmodule.


Paolo

References:
- [RFC PATCH v3 00/59] KVM: X86: TDX support
  - From: isaku . yamahata
- [RFC PATCH v3 53/59] KVM: x86: Add a helper function to restore 4 host MSRs on exit to user space
  - From: isaku . yamahata
- Re: [RFC PATCH v3 53/59] KVM: x86: Add a helper function to restore 4 host MSRs on exit to user space
  - From: Thomas Gleixner
- Re: [RFC PATCH v3 53/59] KVM: x86: Add a helper function to restore 4 host MSRs on exit to user space
  - From: Chao Gao