Re: [PATCH v2 14/25] KVM: VMX: Disable FRED if FRED consistency checks fail

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To: Xin Li <xin3.li@xxxxxxxxx>
Subject: Re: [PATCH v2 14/25] KVM: VMX: Disable FRED if FRED consistency checks fail
From: Chao Gao <chao.gao@xxxxxxxxx>
Date: Tue, 30 Apr 2024 16:21:43 +0800
Cc: "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>, "kvm@xxxxxxxxxxxxxxx" <kvm@xxxxxxxxxxxxxxx>, "linux-doc@xxxxxxxxxxxxxxx" <linux-doc@xxxxxxxxxxxxxxx>, "linux-kselftest@xxxxxxxxxxxxxxx" <linux-kselftest@xxxxxxxxxxxxxxx>, "seanjc@xxxxxxxxxx" <seanjc@xxxxxxxxxx>, "pbonzini@xxxxxxxxxx" <pbonzini@xxxxxxxxxx>, "corbet@xxxxxxx" <corbet@xxxxxxx>, "tglx@xxxxxxxxxxxxx" <tglx@xxxxxxxxxxxxx>, "mingo@xxxxxxxxxx" <mingo@xxxxxxxxxx>, "bp@xxxxxxxxx" <bp@xxxxxxxxx>, "dave.hansen@xxxxxxxxxxxxxxx" <dave.hansen@xxxxxxxxxxxxxxx>, "x86@xxxxxxxxxx" <x86@xxxxxxxxxx>, "hpa@xxxxxxxxx" <hpa@xxxxxxxxx>, "shuah@xxxxxxxxxx" <shuah@xxxxxxxxxx>, "vkuznets@xxxxxxxxxx" <vkuznets@xxxxxxxxxx>, "peterz@xxxxxxxxxxxxx" <peterz@xxxxxxxxxxxxx>, "Shankar, Ravi V" <ravi.v.shankar@xxxxxxxxx>, "xin@xxxxxxxxx" <xin@xxxxxxxxx>
In-reply-to: <20240207172646.3981-15-xin3.li@intel.com>
References: <20240207172646.3981-1-xin3.li@intel.com> <20240207172646.3981-15-xin3.li@intel.com>

On Thu, Feb 08, 2024 at 01:26:34AM +0800, Xin Li wrote:
>Refuse to virtualize FRED if FRED consistency checks fail.

After reading this, I realize some consistency checks are missing in
setup_vmcs_config(). Actually Sean requested some infrastructure for
vmcs_entry_exit_pairs to deal with secondary_vmexit_ctrl.

https://lore.kernel.org/kvm/ZU5F58_KRIHzxrMp@xxxxxxxxxx/

Follow-Ups:
- Re: [PATCH v2 14/25] KVM: VMX: Disable FRED if FRED consistency checks fail
  - From: Sean Christopherson

References:
- [PATCH v2 00/25] Enable FRED with KVM VMX
  - From: Xin Li
- [PATCH v2 14/25] KVM: VMX: Disable FRED if FRED consistency checks fail
  - From: Xin Li

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