From nobody Fri Nov 29 14:41:16 2024 Received: from NAM12-DM6-obe.outbound.protection.outlook.com (mail-dm6nam12on2046.outbound.protection.outlook.com [40.107.243.46]) (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 A56F519DF8B; Thu, 19 Sep 2024 09:45:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.107.243.46 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726739115; cv=fail; b=dCcYTAE/53UOhq7Wypa6dl1UD+JYK0oXim/e/NIMWSu2EM7SHCqEt+JpQk7GiXt3wp4cpR1uL/avq72XBT2BxT7rRZi/F1zG5EdEUyEA6ggVxYUXUpBRpqYwgdiAgMhVybtI2AZazyEeXcaTdFO4SXodkcb+ruHNgxOSBFfZ4rQ= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726739115; c=relaxed/simple; bh=ReSF15x6Fz9cbAIS+BmPe3ITzPb/PVO4IMCRZRH9514=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=emJvgo+wJBbIjZsMAq0FIuteYbrfiRT4e12PIm1yF/e88e4tOC/xFogp2Xz51gtsDNtxNC+k9myrTGDgFcA2fqbNImJCl7LCpou9hEFwSu+LZvF8uCi35wvW82NneOjRmO1SeTxnfEJGDbfv21t/UU5/dgcsoy+IIkNTZ9YHVeM= 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=H3POO4VL; arc=fail smtp.client-ip=40.107.243.46 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="H3POO4VL" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=Vv98mZ055XpIpRH7oeVcm2n29qWOKhwYeS8+YQYXVOQ66lLuGFfsx4ot0T+Q//v63o5Wwdi5AQOD4y6VAd6bL1u0cHOdRxGsd+2Ex7ihwNCIHG1pvrHYLUjCifFke8HUw7hSBdRLxh8/CQX8O4gwdUYOFSfv6IKX3mpyxvOIh/u/YTw1OCW9hjgTbqfenhEvb4syQtj+3z8+fuTKSIQS3WZro4Vl41ilIfNz4w6L/YBdTQ9JJCXW8CUb7WT8qsyK1NDwBI1tz9/22EYMsWkDX0dFaO0gkRAsxbeVDTIDqs/vQJPc8TfrkM5sBstTwBgoaIcSb9uHWxDzQpeks4WuQQ== 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=5wOCBU41KU/9jYAjuxEnaob8uAuZTVT2xJKX1zAfNJ4=; b=nFSDLYXIWGcYyXuv4R4ct1ERo1/R1bd0X5z314kli9YEdy5nDgMbaolyGD3QNACkRxhUjZG2yCqlMoGt52L4u5lv5aOV+vXSd+lGLRXhZjHVClsRqTYM99U0Oe9TMgspC63zeqQPJddMhzfPxu/oYTVbKDe5bwgUrZFrw+f36V8DEfYehdWqjuaY5nJvH7hBteOPNLVaWo2nqTcyJ8c93Q+RdFVhe0EP+A1h+4aGEwLSY24/EdBPrObQkFWUkQxK/eyBCQTgaVVLwPNqXo5AY5G5/VOodWQ4/OsHnCavL8BCheNzE4JwDkEWV7H/Kx1fc3MWnSwMr0PzFgz6NEUXrg== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=redhat.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=5wOCBU41KU/9jYAjuxEnaob8uAuZTVT2xJKX1zAfNJ4=; b=H3POO4VLjrtWTRSVMGOiZ6zqWp1sSOpudJburHalHlF79Upd3tLNM3spgt2H3EXZnb9UH+4uvQA3Kc0bQ91lKLSQXV1yBtW+0aGmxxnkFWAf/AhXbJceRNvRv/+2XKGX+FKp5isY9/z5CN0DlF7XmNQPS3qBaqzu5Aq4Xq9m4Hc= Received: from DM5PR07CA0098.namprd07.prod.outlook.com (2603:10b6:4:ae::27) by DS7PR12MB6216.namprd12.prod.outlook.com (2603:10b6:8:94::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7982.17; Thu, 19 Sep 2024 09:45:09 +0000 Received: from DS1PEPF00017092.namprd03.prod.outlook.com (2603:10b6:4:ae:cafe::a2) by DM5PR07CA0098.outlook.office365.com (2603:10b6:4:ae::27) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7939.27 via Frontend Transport; Thu, 19 Sep 2024 09:45:09 +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=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by DS1PEPF00017092.mail.protection.outlook.com (10.167.17.135) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.7918.13 via Frontend Transport; Thu, 19 Sep 2024 09:45:09 +0000 Received: from kaveri.amd.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Thu, 19 Sep 2024 04:45:01 -0500 From: Shivank Garg To: , , , CC: , , , , , , , , , , , , , Shivansh Dhiman Subject: [RFC PATCH V2 1/3] KVM: guest_memfd: Extend creation API to support NUMA mempolicy Date: Thu, 19 Sep 2024 09:44:36 +0000 Message-ID: <20240919094438.10987-2-shivankg@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240919094438.10987-1-shivankg@amd.com> References: <20240919094438.10987-1-shivankg@amd.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS1PEPF00017092:EE_|DS7PR12MB6216:EE_ X-MS-Office365-Filtering-Correlation-Id: 58805957-a8ea-462c-956b-08dcd88fc019 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|376014|36860700013|7416014|1800799024; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?Rv8E5uecIgabxP5ll8kOmFJCjFHgm1nd/NbLTRCoeB6GJIKxcfS97sWMS7/N?= =?us-ascii?Q?4BSU2qRf8b82hH2hG+vJPMqHwViciAIvDFJodMeh+H/5aeQQZoEv+Y0argQG?= =?us-ascii?Q?5jCPSXW9Hz5hRANf0fh0NFmP1BuJDkIoeriIWUC/SjRZiIdALsROaZkxXdFA?= =?us-ascii?Q?kqSGuN2vcdLGc+4dOV3muJ9eXPen2/rI/fuYMaJB34G9ihI24L26uCXwmY9M?= =?us-ascii?Q?9HLNX46UxS6iCR78gBmYgzTm04Fb55Bbs4wDnIUKR4dilds8rd8Ms9R3BFM3?= =?us-ascii?Q?nwqqtCcU899fByw8VgmHkQYJWLYK5z7lMe0cHWVYUtv2rGz7vq4qgHnMDdP2?= =?us-ascii?Q?6Vzzxjrt811baWe+wRlsVetb0WkbwSSMm9O9WVArk6kXpRTO87u66php6sGb?= =?us-ascii?Q?Zs3yKXF/GwpOlNzUhPrrWan9Waa+FKUP9+QvSOPIkTTAdoBsgy3yzTdfrZi5?= =?us-ascii?Q?aCzINm7wLiWGVexDQfMol0fedvfpEV5g8ba003JVaDyxIQCtfojuOpSCvi8w?= =?us-ascii?Q?IA6x1b8Ai7U8C2m777aGD2g9VDZYoVh55e21A/NFZhuq4P8wDEd5GQf+OBm9?= =?us-ascii?Q?fSKnWsvXfxTMNWvUTHeK7Wk/EO7KNcNNYhZHmWOZ1YQyguDdlEoU0BJTYBFE?= =?us-ascii?Q?Aziu/dovUHC9Hujei3is6oU7k6Mn2EDov7GliO9ZplWmrSkzSGeYOEkSmcNo?= =?us-ascii?Q?RDMEr+R9B/2F/EBfkm1CSeOLbT3txJEsSLVEka5UBb5djJwFi7PxjtdhUx87?= =?us-ascii?Q?JssnQ9d5NHh9CJwJfSC/QnEKqhgl8u25CO1sNie2j70vOqFiDuS6HeNww1j/?= =?us-ascii?Q?2lPm1VfjS1X3DAdfjQk0BImq2oqbTdtiRSRZRiB9cQ7XRqwZKBn1eAg5tZbT?= =?us-ascii?Q?k/lvvnnhXd3N7c4EjuqyVo+1NCBdGRDXz0N2vqsAZXe475LoPLSrs13VBuE4?= =?us-ascii?Q?2hkO4UCXRknjhu2ldwDAbUwFcdBSi3FYPX/DCOUikkSEuekFDlMaOa8OntFi?= =?us-ascii?Q?sybaRoLI6yf4VdvgT1+2MxbCHbYkbG6Je8L7XSOIJ8z6x3KghhtMkoWOBaRK?= =?us-ascii?Q?VEKP1OHGCb63Jv4G8XsniIEJpo4N6ot1B5u3fxRj7y79VAh/dHupl1bIJ15j?= =?us-ascii?Q?8hMM8PMvMxLiesjyoEn7Uzoz2vTNTIM+64ncfjMfuluu1ZRF3Q8plTZGZjpr?= =?us-ascii?Q?VBNxp6Mm1kxzqZDjTpWqyZw/PHwRs7eQbPqt5GpK+BE4suGiPj7sK6x2rByQ?= =?us-ascii?Q?rvIb7Y+vuKeOZlcN9l1kWTouRXwdmlnkIuNwrB2+nUCrCGfwn1vGl9q+3lW6?= =?us-ascii?Q?0RhdPexdV2vNjp+mXHJpHIg2xj8MVY3SSQVqM++o4cyiHTHqa+qcTnjE0JqE?= =?us-ascii?Q?D0m+9qg59GpWl6Qd4/BRJl2rDQibFBmjkbQhiVV+1Er9wXf+vmg1aJ+GAbxw?= =?us-ascii?Q?tzqeULvC7jj6hT1ZORHJC9I4rBuU10ha?= X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(82310400026)(376014)(36860700013)(7416014)(1800799024);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 19 Sep 2024 09:45:09.3655 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 58805957-a8ea-462c-956b-08dcd88fc019 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=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: DS1PEPF00017092.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS7PR12MB6216 Content-Type: text/plain; charset="utf-8" From: Shivansh Dhiman Extend the API of creating guest-memfd to introduce proper NUMA support, allowing VMM to set memory policies effectively. The memory policy defines from which node memory is allocated. The current implementation of KVM guest-memfd does not honor the settings provided by VMM. While mbind() can be used for NUMA policy support in userspace applications, it is not functional for guest-memfd as the memory is not mapped to userspace. Currently, SEV-SNP guest use guest-memfd as a memory backend and would benefit from NUMA support. It enables fine-grained control over memory allocation, optimizing performance for specific workload requirements. To apply memory policy on a guest-memfd, extend the KVM_CREATE_GUEST_MEMFD IOCTL with additional fields related to mempolicy. - mpol_mode represents the policy mode (default, bind, interleave, or preferred). - host_nodes_addr denotes the userspace address of the nodemask, a bit mask of nodes containing up to maxnode bits. - First bit of flags must be set to use mempolicy. Store the mempolicy struct in i_private_data of the memfd's inode, which is currently unused in the context of guest-memfd. Signed-off-by: Shivansh Dhiman Signed-off-by: Shivank Garg --- Documentation/virt/kvm/api.rst | 13 ++++++++- include/linux/mempolicy.h | 4 +++ include/uapi/linux/kvm.h | 5 +++- mm/mempolicy.c | 52 ++++++++++++++++++++++++++++++++++ tools/include/uapi/linux/kvm.h | 5 +++- virt/kvm/guest_memfd.c | 21 ++++++++++++-- virt/kvm/kvm_mm.h | 3 ++ 7 files changed, 97 insertions(+), 6 deletions(-) diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst index b3be87489108..dcb61282c773 100644 --- a/Documentation/virt/kvm/api.rst +++ b/Documentation/virt/kvm/api.rst @@ -6346,7 +6346,10 @@ and cannot be resized (guest_memfd files do however= support PUNCH_HOLE). struct kvm_create_guest_memfd { __u64 size; __u64 flags; - __u64 reserved[6]; + __u64 host_nodes_addr; + __u16 maxnode; + __u8 mpol_mode; + __u8 reserved[37]; }; =20 Conceptually, the inode backing a guest_memfd file represents physical mem= ory, @@ -6367,6 +6370,14 @@ a single guest_memfd file, but the bound ranges must= not overlap). =20 See KVM_SET_USER_MEMORY_REGION2 for additional details. =20 +NUMA memory policy support for KVM guest_memfd allows the host to specify +memory allocation behavior for guest NUMA nodes, similar to mbind(). If +KVM_GUEST_MEMFD_NUMA_ENABLE flag is set, memory allocations from the guest +will use the specified policy and host-nodes for physical memory. +- mpol_mode refers to the policy mode: default, preferred, bind, interleav= e, or + preferred. +- host_nodes_addr points to bitmask of nodes containing up to maxnode bits. + 4.143 KVM_PRE_FAULT_MEMORY --------------------------- =20 diff --git a/include/linux/mempolicy.h b/include/linux/mempolicy.h index 1add16f21612..468eeda2ec2f 100644 --- a/include/linux/mempolicy.h +++ b/include/linux/mempolicy.h @@ -299,4 +299,8 @@ static inline bool mpol_is_preferred_many(struct mempol= icy *pol) } =20 #endif /* CONFIG_NUMA */ + +struct mempolicy *create_mpol_from_args(unsigned char mode, + const unsigned long __user *nmask, + unsigned short maxnode); #endif diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index 637efc055145..fda6cbef0a1d 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -1561,7 +1561,10 @@ struct kvm_memory_attributes { struct kvm_create_guest_memfd { __u64 size; __u64 flags; - __u64 reserved[6]; + __u64 host_nodes_addr; + __u16 maxnode; + __u8 mpol_mode; + __u8 reserved[37]; }; =20 #define KVM_PRE_FAULT_MEMORY _IOWR(KVMIO, 0xd5, struct kvm_pre_fault_memor= y) diff --git a/mm/mempolicy.c b/mm/mempolicy.c index b858e22b259d..9e9450433fcc 100644 --- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -3557,3 +3557,55 @@ static int __init mempolicy_sysfs_init(void) =20 late_initcall(mempolicy_sysfs_init); #endif /* CONFIG_SYSFS */ + +#ifdef CONFIG_KVM_PRIVATE_MEM +/** + * create_mpol_from_args - create a mempolicy structure from args + * @mode: NUMA memory policy mode + * @nmask: bitmask of NUMA nodes + * @maxnode: number of bits in the nodes bitmask + * + * Create a mempolicy from given nodemask and memory policy such as + * default, preferred, interleave or bind. + * + * Return: error encoded in a pointer or memory policy on success. + */ +struct mempolicy *create_mpol_from_args(unsigned char mode, + const unsigned long __user *nmask, + unsigned short maxnode) +{ + struct mm_struct *mm =3D current->mm; + unsigned short mode_flags; + struct mempolicy *mpol; + nodemask_t nodes; + int lmode =3D mode; + int err =3D -ENOMEM; + + err =3D sanitize_mpol_flags(&lmode, &mode_flags); + if (err) + return ERR_PTR(err); + + err =3D get_nodes(&nodes, nmask, maxnode); + if (err) + return ERR_PTR(err); + + mpol =3D mpol_new(mode, mode_flags, &nodes); + if (IS_ERR_OR_NULL(mpol)) + return mpol; + + NODEMASK_SCRATCH(scratch); + if (!scratch) + return ERR_PTR(-ENOMEM); + + mmap_write_lock(mm); + err =3D mpol_set_nodemask(mpol, &nodes, scratch); + mmap_write_unlock(mm); + NODEMASK_SCRATCH_FREE(scratch); + + if (err) + return ERR_PTR(err); + + return mpol; +} +EXPORT_SYMBOL(create_mpol_from_args); +#endif diff --git a/tools/include/uapi/linux/kvm.h b/tools/include/uapi/linux/kvm.h index e5af8c692dc0..e3effcd1e358 100644 --- a/tools/include/uapi/linux/kvm.h +++ b/tools/include/uapi/linux/kvm.h @@ -1546,7 +1546,10 @@ struct kvm_memory_attributes { struct kvm_create_guest_memfd { __u64 size; __u64 flags; - __u64 reserved[6]; + __u64 host_nodes_addr; + __u16 maxnode; + __u8 mpol_mode; + __u8 reserved[37]; }; =20 #define KVM_PRE_FAULT_MEMORY _IOWR(KVMIO, 0xd5, struct kvm_pre_fault_memor= y) diff --git a/virt/kvm/guest_memfd.c b/virt/kvm/guest_memfd.c index e930014b4bdc..8f1877be4976 100644 --- a/virt/kvm/guest_memfd.c +++ b/virt/kvm/guest_memfd.c @@ -4,6 +4,7 @@ #include #include #include +#include =20 #include "kvm_mm.h" =20 @@ -445,7 +446,8 @@ static const struct inode_operations kvm_gmem_iops =3D { .setattr =3D kvm_gmem_setattr, }; =20 -static int __kvm_gmem_create(struct kvm *kvm, loff_t size, u64 flags) +static int __kvm_gmem_create(struct kvm *kvm, loff_t size, u64 flags, + struct mempolicy *pol) { const char *anon_name =3D "[kvm-gmem]"; struct kvm_gmem *gmem; @@ -478,6 +480,7 @@ static int __kvm_gmem_create(struct kvm *kvm, loff_t si= ze, u64 flags) inode->i_private =3D (void *)(unsigned long)flags; inode->i_op =3D &kvm_gmem_iops; inode->i_mapping->a_ops =3D &kvm_gmem_aops; + inode->i_mapping->i_private_data =3D (void *)pol; inode->i_mode |=3D S_IFREG; inode->i_size =3D size; mapping_set_gfp_mask(inode->i_mapping, GFP_HIGHUSER); @@ -505,7 +508,8 @@ int kvm_gmem_create(struct kvm *kvm, struct kvm_create_= guest_memfd *args) { loff_t size =3D args->size; u64 flags =3D args->flags; - u64 valid_flags =3D 0; + u64 valid_flags =3D GUEST_MEMFD_NUMA_ENABLE; + struct mempolicy *mpol =3D NULL; =20 if (flags & ~valid_flags) return -EINVAL; @@ -513,7 +517,18 @@ int kvm_gmem_create(struct kvm *kvm, struct kvm_create= _guest_memfd *args) if (size <=3D 0 || !PAGE_ALIGNED(size)) return -EINVAL; =20 - return __kvm_gmem_create(kvm, size, flags); + if (flags & GUEST_MEMFD_NUMA_ENABLE) { + unsigned char mode =3D args->mpol_mode; + unsigned short maxnode =3D args->maxnode; + const unsigned long __user *user_nmask =3D + (const unsigned long *)args->host_nodes_addr; + + mpol =3D create_mpol_from_args(mode, user_nmask, maxnode); + if (IS_ERR_OR_NULL(mpol)) + return PTR_ERR(mpol); + } + + return __kvm_gmem_create(kvm, size, flags, mpol); } =20 int kvm_gmem_bind(struct kvm *kvm, struct kvm_memory_slot *slot, diff --git a/virt/kvm/kvm_mm.h b/virt/kvm/kvm_mm.h index 715f19669d01..3dd8495ae03d 100644 --- a/virt/kvm/kvm_mm.h +++ b/virt/kvm/kvm_mm.h @@ -36,6 +36,9 @@ static inline void gfn_to_pfn_cache_invalidate_start(stru= ct kvm *kvm, #endif /* HAVE_KVM_PFNCACHE */ =20 #ifdef CONFIG_KVM_PRIVATE_MEM +/* Flag to check NUMA policy while creating KVM guest-memfd. */ +#define GUEST_MEMFD_NUMA_ENABLE BIT_ULL(0) + void kvm_gmem_init(struct module *module); int kvm_gmem_create(struct kvm *kvm, struct kvm_create_guest_memfd *args); int kvm_gmem_bind(struct kvm *kvm, struct kvm_memory_slot *slot, --=20 2.34.1