From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj1-f73.google.com (mail-pj1-f73.google.com [209.85.216.73]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B3FA8361678 for ; Wed, 14 Jan 2026 21:25:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.73 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768425928; cv=none; b=eRTtvxg52fZzAI+kINWtuQt355Bowid/WLWjhJd2A23CBfM21DDtazl3wDkdxl9x28AQqImYfmXe2iK0LgvJhfW/DclgI2z4E3sIJTkw1K6hQLOOxRQ/3Y2QDZh7n0ltyX+6WkDpJOK12X8iSHcY1O3zP5KYHIWz7cgSJGO181c= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768425928; c=relaxed/simple; bh=zb4dyiIPjEf7E3r72RUe47RuzuTNCQQz57NH6qnxHRQ=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=mvUuGAhdz8aALTRIeeG68sfo9hXmmz6NZBMzv6xwDADBE5J642l2n20LVfrLtXW2RD0iTAH00z/rGip73lHlbAhJZrA6rciaz9F9kVN/SNYS/5erRMaQF02IxOZWa4iDjQQo/YPybaW4XwTMkApY+ObMAXkNxr3LnefhhBczf2A= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--seanjc.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=aSXJpKYi; arc=none smtp.client-ip=209.85.216.73 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--seanjc.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="aSXJpKYi" Received: by mail-pj1-f73.google.com with SMTP id 98e67ed59e1d1-34ea5074935so116884a91.0 for ; Wed, 14 Jan 2026 13:25:21 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1768425921; x=1769030721; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=KeDMvbaCH6RufsI8Z0v5M8YKe9gGpw4cDxE5ibRGebg=; b=aSXJpKYiMaDBvcl7KZEpMede0OG+j+0OANP8YlJrQyWFaJTRVUHBzjB8V4/0PglVrP rvvrfUYavl1xYCG/3AMGt3eJfjlYaT4h9pv5JgfpxPY/HKeAP+rg3/Pee9NhFRykY1LI 7zbHPMOfeSCWSSjKz3oQsnDfXsIY0XLwG07HsoxJbWo1jquTT/EeqVLMYho/yx8dzjlN 18WS/LT0i0eYBu0idGtuErQz4ntHZ0pEY65c5RSX9Ou2QvJxMnkrzcD5XVb6+y1gbcob tq++h8Y6Pyd7cGijQ9HWryOqBwE3nZrWkfmfEDJJdQyLHQ3ODa3RG8cPfSwTXfXR2Z7X j8rg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1768425921; x=1769030721; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=KeDMvbaCH6RufsI8Z0v5M8YKe9gGpw4cDxE5ibRGebg=; b=vwZrIw2a7qq1MeCUTQMd/Ibye/cDkXs+me2exsJdiEWhizZLicGuXtbF6b2ENT4wyy VZsuuQJtGcRNGmpSdyqnYkWqPf2kqkluNm5ujvNuM9lnUl5uQSmML2waa9cWV2TFixQz +TGL0KiwjLBWMbXyekN1rta9bFZqU09GORzC1qTfxdUxmCpoaM0t6x1AgGUQOflIea00 Sfxu6awtlmaHWMXZ5H975Er6ShvvqO9eiWGMDKkS0IGUockm7EI2lMkRZYrLvEyrKVqB SQbpeqetdM1AiyAL15EPtavL6iH8Oegh3TynN0KnxRgWcSgzSaGw2CHYF7kCUmBzSJOx 8ziw== X-Forwarded-Encrypted: i=1; AJvYcCWDtZMRktZvarEveq/YCIZxiauEFBF5rujyIMEvTpADHh2Tjf2le9PSOzNtTcdxQlMnoxWqvL+vAzK0J3z43vE=@vger.kernel.org X-Gm-Message-State: AOJu0Yxxlm10BIFwdiXYvK5eYOaDkzHPDxb0QlOTNmuIXWEhB35DFjO8 l7cqwNv11o8sI+RNKEM9NLy7gtdILSXpbzbiXvpP7rLiOr+XvYjuwE/lNzaF/m+tJZj08lBMqOy JXPJMgg== X-Received: from pjbco24.prod.google.com ([2002:a17:90a:fe98:b0:33b:b0fe:e54d]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:5206:b0:343:a631:28a8 with SMTP id 98e67ed59e1d1-351091a9fcemr4081136a91.37.1768425920938; Wed, 14 Jan 2026 13:25:20 -0800 (PST) Date: Wed, 14 Jan 2026 13:25:19 -0800 In-Reply-To: <20260113003016.3511895-3-jmattson@google.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260113003016.3511895-1-jmattson@google.com> <20260113003016.3511895-3-jmattson@google.com> Message-ID: Subject: Re: [PATCH 02/10] KVM: x86: nSVM: Add VALID_GPAT flag to kvm_svm_nested_state_hdr From: Sean Christopherson To: Jim Mattson Cc: Paolo Bonzini , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Shuah Khan , Joerg Roedel , Avi Kivity , Alexander Graf , "Radim =?utf-8?B?S3LEjW3DocWZ?=" , David Hildenbrand , Cathy Avery , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org Content-Type: text/plain; charset="us-ascii" On Mon, Jan 12, 2026, Jim Mattson wrote: > /* for KVM_CAP_NESTED_STATE */ > diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c > index a0e5bf1aba52..ed24e08d2d21 100644 > --- a/arch/x86/kvm/svm/nested.c > +++ b/arch/x86/kvm/svm/nested.c > @@ -1769,6 +1769,7 @@ static int svm_get_nested_state(struct kvm_vcpu *vcpu, > /* First fill in the header and copy it out. */ > if (is_guest_mode(vcpu)) { > kvm_state.hdr.svm.vmcb_pa = svm->nested.vmcb12_gpa; > + kvm_state.hdr.svm.flags = KVM_STATE_SVM_VALID_GPAT; Assuming this survives to v2, make this: kvm_state.hdr.svm.flags |= KVM_STATE_SVM_VALID_GPAT; both to communicate that there's no pre-existing bug where KVM doesn't initialize flags, and so that there's less risk of clobbering others flags, e.g. if a new flag is added in the future and is set before this point. > kvm_state.size += KVM_STATE_NESTED_SVM_VMCB_SIZE; > kvm_state.flags |= KVM_STATE_NESTED_GUEST_MODE; > > -- > 2.52.0.457.g6b5491de43-goog >