From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 AE405321F27 for ; Mon, 29 Dec 2025 14:39:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767019171; cv=none; b=jgODIyc7OAsGUURDFwQsaHqql+8g1snU030KkH8zaWuTlTsqHzg4Ch6P1jqIuQXyRPLsRibZDXV/4PKwWZfPytRctqq2Ey93t2mrwQqXu7osCeHOP9gF6FZLW46yOPA3FCBdplEls/SITpKZRgszrNf0ZSQXetFKGfvtp7cHXD4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767019171; c=relaxed/simple; bh=lbH/a987o+gvTgiM9TTHCLdRPxZ48B2kMID2HPYYhvs=; h=Subject:To:Cc:From:Date:Message-ID:MIME-Version:Content-Type; b=PsxsomYqWLj/9CNGpHZNgyQK3FCSTO2QWeEx+sLby5cGZ6pj3eqjSzZw7S8aHSGjd2BciG6LBwskbMF5yg3PYWOm88UjArftBN7dCRhHcV0ZTdq98BHdQYwWVxj/PXYG6vv7kkjifsL1HWuQyzhmJCh5dtHTf1lOVX8S27HfgOE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=PY59CPJK; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="PY59CPJK" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3B06DC4CEF7; Mon, 29 Dec 2025 14:39:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1767019170; bh=lbH/a987o+gvTgiM9TTHCLdRPxZ48B2kMID2HPYYhvs=; h=Subject:To:Cc:From:Date:From; b=PY59CPJK9G+B9XetLy/2xtIOUuWYey8D0pkJz4Wiz21F40T7iY0i5/8rzhVZBTu4Z d8rizx0I3E53CCkpuENTxG/f3lRRMHRIGi8EUOggHApgF+Me4LwRiBWIM2HQLALfDY Euf+b5fAZ5ZpLojlM8YSUZxTb2BVUdlMecGtROq4= Subject: FAILED: patch "[PATCH] KVM: SVM: Mark VMCB_NPT as dirty on nested VMRUN" failed to apply to 5.15-stable tree To: jmattson@google.com,seanjc@google.com Cc: From: Date: Mon, 29 Dec 2025 15:36:29 +0100 Message-ID: <2025122929-riveter-outreach-a5e9@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x 7c8b465a1c91f674655ea9cec5083744ec5f796a # git commit -s git send-email --to '' --in-reply-to '2025122929-riveter-outreach-a5e9@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 7c8b465a1c91f674655ea9cec5083744ec5f796a Mon Sep 17 00:00:00 2001 From: Jim Mattson Date: Mon, 22 Sep 2025 09:29:23 -0700 Subject: [PATCH] KVM: SVM: Mark VMCB_NPT as dirty on nested VMRUN Mark the VMCB_NPT bit as dirty in nested_vmcb02_prepare_save() on every nested VMRUN. If L1 changes the PAT MSR between two VMRUN instructions on the same L1 vCPU, the g_pat field in the associated vmcb02 will change, and the VMCB_NPT clean bit should be cleared. Fixes: 4bb170a5430b ("KVM: nSVM: do not mark all VMCB02 fields dirty on nested vmexit") Cc: stable@vger.kernel.org Signed-off-by: Jim Mattson Link: https://lore.kernel.org/r/20250922162935.621409-3-jmattson@google.com Signed-off-by: Sean Christopherson diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c index 35cea27862c6..83de3456df70 100644 --- a/arch/x86/kvm/svm/nested.c +++ b/arch/x86/kvm/svm/nested.c @@ -613,6 +613,7 @@ static void nested_vmcb02_prepare_save(struct vcpu_svm *svm, struct vmcb *vmcb12 struct kvm_vcpu *vcpu = &svm->vcpu; nested_vmcb02_compute_g_pat(svm); + vmcb_mark_dirty(vmcb02, VMCB_NPT); /* Load the nested guest state */ if (svm->nested.vmcb12_gpa != svm->nested.last_vmcb12_gpa) {