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Tsirkin" , Zhu Lingshan , Stefano Garzarella , Xie Yongji , Eli Cohen , Si-Wei Liu , Parav Pandit , Longpeng , , , , Subject: [RFC PATCH v2 08/19] vhost_iotlb: split out IOTLB initialization Date: Fri, 25 Feb 2022 02:52:48 +0530 Message-ID: <20220224212314.1326-9-gdawar@xilinx.com> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20220224212314.1326-1-gdawar@xilinx.com> References: <20201216064818.48239-1-jasowang@redhat.com> <20220224212314.1326-1-gdawar@xilinx.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: e2b66660-5d5a-4649-f7c0-08d9f7dc3e31 X-MS-TrafficTypeDiagnostic: DM8PR02MB8248:EE_ X-Microsoft-Antispam-PRVS: X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:149.199.62.198;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:xsj-pvapexch01.xlnx.xilinx.com;PTR:unknown-62-198.xilinx.com;CAT:NONE;SFS:(13230001)(4636009)(46966006)(36840700001)(40470700004)(26005)(426003)(70206006)(336012)(54906003)(47076005)(70586007)(8676002)(186003)(6666004)(7696005)(82310400004)(316002)(36860700001)(4326008)(2906002)(508600001)(9786002)(5660300002)(36756003)(7416002)(83380400001)(8936002)(7636003)(44832011)(2616005)(1076003)(109986005)(40460700003)(356005)(102446001)(266003)(21314003);DIR:OUT;SFP:1101; X-OriginatorOrg: xilinx.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 24 Feb 2022 21:25:55.7026 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: e2b66660-5d5a-4649-f7c0-08d9f7dc3e31 X-MS-Exchange-CrossTenant-Id: 657af505-d5df-48d0-8300-c31994686c5c X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=657af505-d5df-48d0-8300-c31994686c5c;Ip=[149.199.62.198];Helo=[xsj-pvapexch01.xlnx.xilinx.com] X-MS-Exchange-CrossTenant-AuthSource: DM3NAM02FT063.eop-nam02.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM8PR02MB8248 To: unlisted-recipients:; (no To-header on input) Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org This patch splits out IOTLB initialization to make sure it could be reused by external modules. Signed-off-by: Jason Wang Signed-off-by: Gautam Dawar --- drivers/vhost/iotlb.c | 23 ++++++++++++++++++----- include/linux/vhost_iotlb.h | 2 ++ 2 files changed, 20 insertions(+), 5 deletions(-) diff --git a/drivers/vhost/iotlb.c b/drivers/vhost/iotlb.c index 670d56c879e5..6239d0ad3853 100644 --- a/drivers/vhost/iotlb.c +++ b/drivers/vhost/iotlb.c @@ -110,6 +110,23 @@ void vhost_iotlb_del_range(struct vhost_iotlb *iotlb, u64 start, u64 last) } EXPORT_SYMBOL_GPL(vhost_iotlb_del_range); +/** + * vhost_iotlb_init - initialize a vhost IOTLB + * @iotlb: the IOTLB that needs to be initialized + * @limit: maximum number of IOTLB entries + * @flags: VHOST_IOTLB_FLAG_XXX + */ +void vhost_iotlb_init(struct vhost_iotlb *iotlb, unsigned int limit, + unsigned int flags) +{ + iotlb->root = RB_ROOT_CACHED; + iotlb->limit = limit; + iotlb->nmaps = 0; + iotlb->flags = flags; + INIT_LIST_HEAD(&iotlb->list); +} +EXPORT_SYMBOL_GPL(vhost_iotlb_init); + /** * vhost_iotlb_alloc - add a new vhost IOTLB * @limit: maximum number of IOTLB entries @@ -124,11 +141,7 @@ struct vhost_iotlb *vhost_iotlb_alloc(unsigned int limit, unsigned int flags) if (!iotlb) return NULL; - iotlb->root = RB_ROOT_CACHED; - iotlb->limit = limit; - iotlb->nmaps = 0; - iotlb->flags = flags; - INIT_LIST_HEAD(&iotlb->list); + vhost_iotlb_init(iotlb, limit, flags); return iotlb; } diff --git a/include/linux/vhost_iotlb.h b/include/linux/vhost_iotlb.h index 2d0e2f52f938..e79a40838998 100644 --- a/include/linux/vhost_iotlb.h +++ b/include/linux/vhost_iotlb.h @@ -36,6 +36,8 @@ int vhost_iotlb_add_range(struct vhost_iotlb *iotlb, u64 start, u64 last, u64 addr, unsigned int perm); void vhost_iotlb_del_range(struct vhost_iotlb *iotlb, u64 start, u64 last); +void vhost_iotlb_init(struct vhost_iotlb *iotlb, unsigned int limit, + unsigned int flags); struct vhost_iotlb *vhost_iotlb_alloc(unsigned int limit, unsigned int flags); void vhost_iotlb_free(struct vhost_iotlb *iotlb); void vhost_iotlb_reset(struct vhost_iotlb *iotlb); -- 2.25.0