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client-ip=165.204.84.17; helo=satlexmb08.amd.com; pr=C Received: from satlexmb08.amd.com (165.204.84.17) by BN2PEPF000055DB.mail.protection.outlook.com (10.167.245.5) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.202.0 via Frontend Transport; Mon, 29 Jun 2026 15:42:09 +0000 Received: from Satlexmb09.amd.com (10.181.42.218) by satlexmb08.amd.com (10.181.42.217) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.41; Mon, 29 Jun 2026 10:41:57 -0500 Received: from purico-ed03host.amd.com (10.180.168.240) by satlexmb09.amd.com (10.181.42.218) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.41; Mon, 29 Jun 2026 08:36:58 -0700 From: Suravee Suthikulpanit To: , , , CC: , , , , , , , , , , , , , Suravee Suthikulpanit Subject: [PATCH v3 14/22] iommu/amd: Add per-VM private IPA alloc/map helpers Date: Mon, 29 Jun 2026 15:35:27 +0000 Message-ID: <20260629153535.15775-15-suravee.suthikulpanit@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260629153535.15775-1-suravee.suthikulpanit@amd.com> References: <20260629153535.15775-1-suravee.suthikulpanit@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: 8bit Content-Type: text/plain X-ClientProxiedBy: satlexmb08.amd.com (10.181.42.217) To satlexmb09.amd.com (10.181.42.218) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN2PEPF000055DB:EE_|LV8PR12MB9153:EE_ X-MS-Office365-Filtering-Correlation-Id: 06fab788-b2db-431f-38d8-08ded5f4fb11 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|23010399003|1800799024|82310400026|36860700016|376014|7416014|22082099003|18002099003|56012099006|11063799006; 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Add alloc_private_vm_region() and free_private_vm_region() to allocate backing pages, map them through viommu_pdom, and tear down with an unmap flush on VM destroy. Signed-off-by: Suravee Suthikulpanit --- drivers/iommu/amd/viommu.c | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) diff --git a/drivers/iommu/amd/viommu.c b/drivers/iommu/amd/viommu.c index 897355a143d6..808f0b304006 100644 --- a/drivers/iommu/amd/viommu.c +++ b/drivers/iommu/amd/viommu.c @@ -374,3 +374,41 @@ int __init amd_viommu_init(struct amd_iommu *iommu) viommu_free_self_dev_data(iommu, dte_set); return ret; } + +static int __maybe_unused alloc_private_vm_region(struct amd_iommu *iommu, u64 **entry, + u64 base, size_t size, u16 gid) +{ + int ret; + void *va = NULL; + u64 addr = base + (gid * size); + + ret = viommu_priv_alloc_map_flush(iommu, addr, size, GFP_KERNEL | __GFP_ZERO, &va); + if (ret) { + *entry = NULL; + return ret; + } + + *entry = (u64 *)va; + + pr_debug("%s: entry=%#llx(%#llx), addr=%#llx, size=%#lx\n", __func__, + (unsigned long long)*entry, iommu_virt_to_phys(*entry), addr, size); + + return 0; +} + +static void __maybe_unused free_private_vm_region(struct amd_iommu *iommu, u64 **entry, + u64 base, size_t size, u16 gid) +{ + u64 addr = base + (gid * size); + + if (!iommu || !iommu->viommu_pdom || !*entry) + return; + + pr_debug("%s: entry=%#llx(%#llx), base=%#llx, addr=%#llx, size=%#lx\n", + __func__, (unsigned long long)*entry, + iommu_virt_to_phys(*entry), base, addr, size); + + viommu_priv_unmap_flush_free(iommu, addr, size, *entry); + + *entry = NULL; +} -- 2.34.1