From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.zytor.com (terminus.zytor.com [198.137.202.136]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9D37E19B59F; Fri, 25 Oct 2024 07:34:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.137.202.136 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729841697; cv=none; b=jUYVKSPupBRi7/MyGyaLj4tSY3a3U0FVFKzEqKdaIhLMXai2VOl5nAyBXHKzbYFJF0TfkqxsD5M1TX+vE6jPXYAN85MtprgNw28xS+J6l2vWgrS4xeiv0JlhmaJsqrxegHabh74t6d9vH8iZ7LrucR1KNwFFY+UdIu9jKcfNCeg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729841697; c=relaxed/simple; bh=HPJBTKt2s2JeWexm0xhl7kakBBDv3mVKl4YY8KXecAw=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=dpSsnqyq0mlfdnnIewcnJxymZWPDHobgef3Yau3MwfJcLzwVdjEU7BmL4I4Zk2/VvXSNjWcFUrqDPN0Ky6u4jp+b/VmWcmNwhHqTyi2H63jBpbFXPdQ8DwodjZcbxCxtf1vRBayasDdxEjFLU8EwT/pnN6VgUv9S/gS4saU5kMQ= ARC-Authentication-Results:i=1; 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h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=CGOdiDUZtrAVWGZ+UD7uvQ7SblFNDAyNg+X3t9KyodNOCLn7fdUXDBZMzgsiCPKKp FYI5PQk30f99GbBFJalGmSRVv3Ou+04ocpQhefz1dOg5gkJwBxkk46mrHM3c5Kws/e IKiwBPNwwGNlg6lSojeivOTYaiqBcdBkGw6YrIAcVjB0ws2+ur+5SAlIctJ7J4YTdX 4Z8TMlL2MjvIod5PFMBe3jClwzIA7zcHuru9G1SiE8B4b1f6RAZS0hOxIeAJ0Wu3xP Yu/JUggtaLKceXlwNxEJkvRiaahj4BYGgglQ6sm/ylNjHTd78ZNpFepWf5gHFTlSrn m7iPXSMzEok5Q== Message-ID: Date: Fri, 25 Oct 2024 00:34:24 -0700 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 21/27] KVM: VMX: Invoke vmx_set_cpu_caps() before nested setup To: Chao Gao Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, seanjc@google.com, pbonzini@redhat.com, corbet@lwn.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, luto@kernel.org, peterz@infradead.org, andrew.cooper3@citrix.com References: <20241001050110.3643764-1-xin@zytor.com> <20241001050110.3643764-22-xin@zytor.com> Content-Language: en-US From: Xin Li Autocrypt: addr=xin@zytor.com; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 10/24/2024 12:49 AM, Chao Gao wrote: > On Mon, Sep 30, 2024 at 10:01:04PM -0700, Xin Li (Intel) wrote: >> From: Xin Li >> >> Set VMX CPU capabilities before initializing nested instead of after, >> as it needs to check VMX CPU capabilities to setup the VMX basic MSR >> for nested. > > Which VMX CPU capabilities are needed? after reading patch 25, I still > don't get that. Sigh, in v2 I had 'if (kvm_cpu_cap_has(X86_FEATURE_FRED))' in nested_vmx_setup_basic(), which is changed to 'if (cpu_has_vmx_fred())' in v3. So the reason for the change is gone. But I think logically the change is still needed; nested setup should be after VMX setup.