From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from PH0PR06CU001.outbound.protection.outlook.com (mail-westus3azon11011051.outbound.protection.outlook.com [40.107.208.51]) (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 3778123D291; Fri, 26 Jun 2026 11:00:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.107.208.51 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782471647; cv=fail; b=ew9JcS5YG6hm7f1sxvgPmmTXC9fsry12T9Jnc7a97P1EckO7vC55FlmUJuZPQ0RCMQaJPS8ISbags/SoCnnuu+zg2zebDVGHBhyAUqr9BrgFDGJQu7/npz5/hvQLZbCAzrp2H3PfdNugFjS79oCQmlflZMRNSrR70iGJnzl24uU= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782471647; c=relaxed/simple; bh=uZ0QUNa1ZypLQZzw9N/Kfsr1WcwlOawEL6LiDXBu+FQ=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=mi9xkYBgXpTjRAJoDWlOtwCS/aAeERNzmrxjNifQ2i37tziLf7A/J5e1qx5ZIJuP3iibYhMAC/0wmQ6WUsNIeESoUvtk1QWSU+0hcC0YFmKdx3h7bUzEuV+RXWi12S+kPSk5JnYhz8q7laY1S+hWgVaBtH9Ey6B2/kiAaFhnpeY= ARC-Authentication-Results:i=2; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amd.com; spf=fail smtp.mailfrom=amd.com; dkim=pass (1024-bit key) header.d=amd.com header.i=@amd.com header.b=L2DRtCph; arc=fail smtp.client-ip=40.107.208.51 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amd.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=amd.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=amd.com header.i=@amd.com header.b="L2DRtCph" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=NRP0rmWVPLzY1H3X677tCf0w9mqbSzqkzqCTIzB+saBd/EoaXeCoZ/SF4ChDcNjxwgwAweyBu4LmuCee3pGTZE8seQBPexMeupqPqHl7NlbMkMknzPSbprLh3Ohy5/J6BG3/lJ2w7u6OIkaUA3zGwMtU5IaZEeEffGbg4WwnhsnGWMlzeraeW+fAeBHjNhcQwTQWUKsEBveZjMDGUZkc6kpHvHrBsoB1iipkVSO5B/bU6OKfsKrBljCiKTFCoW7ZNTv7Asgx7OHt0zFukbdGWEq1vF2sAifD9WRiVVkUf4zykRYH755ce4bWQ1kQNqeto5XfwCwdu/CFKGbJNKG9EA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=F9zM1JwaGvzYzZncMkIR8Tk8MNKuxUPlpbVORal2U1M=; b=meLkTTloTfl5JJx+peLcBysV262RmOqfW2LkXWrxH3bfDVSHlg+91WpINe6a0lRl0npLe8d6RONPrpCKQXcz9wPfDwNBR6WFIcT+RrphlLaLQpjjMIPeKJBx2WLBBOtTMotzcug9SttkaVUum2H9PCD4EncPh6vz+Cd6QcjuWqLkjbGmGLFd+cOlbOTXT4UKv5XlXvKtdsNaNXUnAOWZY5QLjVRgrSH1G5fo3S4EawpjST4S3L5hXrTI9onSyUb4SxHaq7t3MAT2fTa3AXmPaNmIkPqkjCHvDkRDkXP3OQ+o/aMmIH9dQLp4/zBLElNFCCxgy9MPr53kRvWxUA+95g== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=zytor.com smtp.mailfrom=amd.com; dmarc=pass (p=quarantine sp=quarantine pct=100) action=none header.from=amd.com; dkim=none (message not signed); arc=none (0) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amd.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=F9zM1JwaGvzYzZncMkIR8Tk8MNKuxUPlpbVORal2U1M=; b=L2DRtCphSsRWdSaLzRaJJ661OADrnNU6sKDADK//ZzupRpTlqh0D9uCGzWxKtm61sKKElXWmCW4ueHaI/6jDMynZDRj3/fIydWzky3QMFFF3EQ51Uan+uTuSr+Dg/wijMfnoIzrkwhqvyfBdBaTnZQlZf5QYOB++iAihWfbAGtc= Received: from CY5PR17CA0014.namprd17.prod.outlook.com (2603:10b6:930:17::23) by MW5PR12MB5599.namprd12.prod.outlook.com (2603:10b6:303:194::16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.159.17; Fri, 26 Jun 2026 11:00:41 +0000 Received: from CH2PEPF00000146.namprd02.prod.outlook.com (2603:10b6:930:17:cafe::18) by CY5PR17CA0014.outlook.office365.com (2603:10b6:930:17::23) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.21.159.17 via Frontend Transport; Fri, 26 Jun 2026 11:00:41 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=satlexmb07.amd.com; pr=C Received: from satlexmb07.amd.com (165.204.84.17) by CH2PEPF00000146.mail.protection.outlook.com (10.167.244.103) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.181.6 via Frontend Transport; Fri, 26 Jun 2026 11:00:40 +0000 Received: from BLR-L1-SARUNKOD.amd.com (10.180.168.240) by satlexmb07.amd.com (10.181.42.216) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.41; Fri, 26 Jun 2026 06:00:32 -0500 From: Sairaj Kodilkar To: "H. Peter Anvin" , "Joerg Roedel (AMD)" , Borislav Petkov , Dave Hansen , Ingo Molnar , Paolo Bonzini , "Robin Murphy" , Sairaj Kodilkar , "Sean Christopherson" , Suravee Suthikulpanit , Thomas Gleixner , "Vasant Hegde" , Will Deacon , , , , Subject: [RFC PATCH 3/5] kvm/svm: Introduce per-CPU lock and wakeup queue Date: Fri, 26 Jun 2026 16:29:04 +0530 Message-ID: <20260626105906.14577-4-sarunkod@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260626105906.14577-1-sarunkod@amd.com> References: <20260626105906.14577-1-sarunkod@amd.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit X-ClientProxiedBy: satlexmb07.amd.com (10.181.42.216) To satlexmb07.amd.com (10.181.42.216) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH2PEPF00000146:EE_|MW5PR12MB5599:EE_ X-MS-Office365-Filtering-Correlation-Id: cab75332-e50e-4645-00f9-08ded3722986 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700016|82310400026|1800799024|23010399003|376014|7416014|921020|18002099003|22082099003|11063799006|56012099006; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:satlexmb07.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(36860700016)(82310400026)(1800799024)(23010399003)(376014)(7416014)(921020)(18002099003)(22082099003)(11063799006)(56012099006);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 0mTMQYuajdwXvSDN5JF+efsiyES+2GwfAqDaxPYZcqjR22EfSwIhZFe9DjziItKj8UlsUecaWrD88dWYDJmRREWEYuUfCQaHRCDKA0XZI6GRUp/Iy/dy3Dr7pJGXBPIFWRBjb8cxCWs60F70ecFLhwCtmoATlTDBrN/HPwS6qtgUzam/l0BkznY5JI4iAtwBA2G4k97OK9UHQOmtZ1ZaCR5gu+TcirS5kaIUVtCYkYITIQf9lrXhPQHK696oZkfZnQUhVVtfC+L2mOLmMModZvcBAFdQ3Y+O76oXPxk1og8To5PVRTpZVhItiIexChy+AO0mFULP1yxZCLQ0EbC6T1im7qOXZ5hn9eoKuqHS0fBvJoIZf1JMBfhUv59eqdo5g6q2dwwadEgrxUAGbbIGPm07F6s8J6/+MWRKZROEEG0QDyI/gNF0pO6LH58vzoCv X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 26 Jun 2026 11:00:40.9024 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: cab75332-e50e-4645-00f9-08ded3722986 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[satlexmb07.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CH2PEPF00000146.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW5PR12MB5599 Add a per-CPU list and raw spinlock that SVM will use to track vCPUs blocked and waiting for a wakeup. The GAPPI interrupt handler will scan the corresponding CPU’s list to decide which vCPU to run. Initialize both in avic_hardware_setup() when AVIC is enabled. Signed-off-by: Sairaj Kodilkar --- arch/x86/kvm/svm/avic.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/arch/x86/kvm/svm/avic.c b/arch/x86/kvm/svm/avic.c index b666efb5d91c..e7a4c0e90e7a 100644 --- a/arch/x86/kvm/svm/avic.c +++ b/arch/x86/kvm/svm/avic.c @@ -63,6 +63,9 @@ ga_tag; \ }) +static DEFINE_PER_CPU(struct list_head, gappi_vcpu_wakeup_list); +static DEFINE_PER_CPU(raw_spinlock_t, gappi_vcpu_wakeup_list_lock); + static_assert(__AVIC_GATAG(AVIC_VM_ID_MASK, AVIC_VCPU_IDX_MASK) == -1u); #define AVIC_AUTO_MODE -1 @@ -1315,12 +1318,18 @@ static bool __init avic_want_avic_enabled(void) */ bool __init avic_hardware_setup(void) { + int cpu; avic = avic_want_avic_enabled(); if (!avic) return false; pr_info("AVIC enabled\n"); + for_each_possible_cpu(cpu) { + INIT_LIST_HEAD(&per_cpu(gappi_vcpu_wakeup_list, cpu)); + raw_spin_lock_init(&per_cpu(gappi_vcpu_wakeup_list_lock, cpu)); + } + /* AVIC is a prerequisite for x2AVIC. */ x2avic_enabled = boot_cpu_has(X86_FEATURE_X2AVIC); if (x2avic_enabled) { -- 2.34.1