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 22AF735BDC4; Fri, 9 Jan 2026 12:40:30 +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=1767962431; cv=none; b=NZmHl78b1bOmkewipeP1ps22wxFQ1xgJp55vSqNI8yUN9S3dnfUU7LjAlQ/sZ6sCiabWpMAcBw5Nv+K0NV3shOCSlFNG2bVEN4emQZ9aV9qGUSBz03tjft8FUgS/gv30ha1VfSNjzhiaFaVAvSFrhH1RXnVHNPdQdHqG5oA4XKI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767962431; c=relaxed/simple; bh=z1dsYQwmeiAR9xEca2eEeIwKBzxPUonGgczO/ugVba4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=NWqtwwRl/lGtTG3QFOJMPnorQydbZcb4ClsJ4edg6+x7iUllfq5zeiaSlcjO4uA0e340GsTqsg/+NYQBhshpeSpiCAGBHdFJZHt7n9OA5LRCo0HCUPr0urO2y2sWj2Ey+3y1SK9OlQj5vdCTNre6AZOjYix7+csmNk93/58EN2E= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=c3RjKVRo; 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="c3RjKVRo" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5C59CC4CEF1; Fri, 9 Jan 2026 12:40:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1767962430; bh=z1dsYQwmeiAR9xEca2eEeIwKBzxPUonGgczO/ugVba4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=c3RjKVRozekHii7FEva9CqW7PowdX29ZJuE+VyjcFlAbD/cTp50dbrkq96lmJJJCI BLm1Ec2hPLHxqhxTxwaolLrtUdDw0Z6m7NbTlbcJIy7dtqMno1xlNJr+FcnLPssN+4 eo9imkxA96xkQ/8EmaUfZdJGdalqUfpC+tv5EXHM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Jim Mattson , Sean Christopherson Subject: [PATCH 6.1 363/634] KVM: SVM: Mark VMCB_NPT as dirty on nested VMRUN Date: Fri, 9 Jan 2026 12:40:41 +0100 Message-ID: <20260109112131.182843146@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260109112117.407257400@linuxfoundation.org> References: <20260109112117.407257400@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jim Mattson commit 7c8b465a1c91f674655ea9cec5083744ec5f796a upstream. 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 Signed-off-by: Greg Kroah-Hartman --- arch/x86/kvm/svm/nested.c | 1 + 1 file changed, 1 insertion(+) --- a/arch/x86/kvm/svm/nested.c +++ b/arch/x86/kvm/svm/nested.c @@ -520,6 +520,7 @@ static void nested_vmcb02_prepare_save(s struct vmcb *vmcb02 = svm->nested.vmcb02.ptr; 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) {