From: Yi Liu <yi.l.liu@intel.com>
To: joro@8bytes.org, alex.williamson@redhat.com, jgg@nvidia.com,
kevin.tian@intel.com, robin.murphy@arm.com,
baolu.lu@linux.intel.com
Cc: cohuck@redhat.com, eric.auger@redhat.com, nicolinc@nvidia.com,
kvm@vger.kernel.org, mjrosato@linux.ibm.com,
chao.p.peng@linux.intel.com, yi.l.liu@intel.com,
yi.y.sun@linux.intel.com, peterx@redhat.com, jasowang@redhat.com,
shameerali.kolothum.thodi@huawei.com, lulu@redhat.com,
suravee.suthikulpanit@amd.com, iommu@lists.linux.dev,
linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org,
zhenzhong.duan@intel.com,
Jacob Pan <jacob.jun.pan@linux.intel.com>
Subject: [PATCH v3 03/10] iommu/vt-d: Add helper for nested domain allocation
Date: Thu, 11 May 2023 07:51:03 -0700 [thread overview]
Message-ID: <20230511145110.27707-4-yi.l.liu@intel.com> (raw)
In-Reply-To: <20230511145110.27707-1-yi.l.liu@intel.com>
From: Lu Baolu <baolu.lu@linux.intel.com>
This adds helper for accepting user parameters and allocate a nested
domain.
Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
---
drivers/iommu/intel/Makefile | 2 +-
drivers/iommu/intel/iommu.h | 2 ++
drivers/iommu/intel/nested.c | 47 ++++++++++++++++++++++++++++++++++++
3 files changed, 50 insertions(+), 1 deletion(-)
create mode 100644 drivers/iommu/intel/nested.c
diff --git a/drivers/iommu/intel/Makefile b/drivers/iommu/intel/Makefile
index 7af3b8a4f2a0..5dabf081a779 100644
--- a/drivers/iommu/intel/Makefile
+++ b/drivers/iommu/intel/Makefile
@@ -1,6 +1,6 @@
# SPDX-License-Identifier: GPL-2.0
obj-$(CONFIG_DMAR_TABLE) += dmar.o
-obj-$(CONFIG_INTEL_IOMMU) += iommu.o pasid.o
+obj-$(CONFIG_INTEL_IOMMU) += iommu.o pasid.o nested.o
obj-$(CONFIG_DMAR_TABLE) += trace.o cap_audit.o
obj-$(CONFIG_DMAR_PERF) += perf.o
obj-$(CONFIG_INTEL_IOMMU_DEBUGFS) += debugfs.o
diff --git a/drivers/iommu/intel/iommu.h b/drivers/iommu/intel/iommu.h
index e818520f4068..8d0c7970c1ad 100644
--- a/drivers/iommu/intel/iommu.h
+++ b/drivers/iommu/intel/iommu.h
@@ -858,6 +858,8 @@ void *alloc_pgtable_page(int node, gfp_t gfp);
void free_pgtable_page(void *vaddr);
void iommu_flush_write_buffer(struct intel_iommu *iommu);
struct intel_iommu *device_to_iommu(struct device *dev, u8 *bus, u8 *devfn);
+struct iommu_domain *intel_nested_domain_alloc(struct iommu_domain *s2_domain,
+ const union iommu_domain_user_data *user_data);
#ifdef CONFIG_INTEL_IOMMU_SVM
void intel_svm_check(struct intel_iommu *iommu);
diff --git a/drivers/iommu/intel/nested.c b/drivers/iommu/intel/nested.c
new file mode 100644
index 000000000000..f83931bb44b6
--- /dev/null
+++ b/drivers/iommu/intel/nested.c
@@ -0,0 +1,47 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * nested.c - nested mode translation support
+ *
+ * Copyright (C) 2023 Intel Corporation
+ *
+ * Author: Lu Baolu <baolu.lu@linux.intel.com>
+ * Jacob Pan <jacob.jun.pan@linux.intel.com>
+ */
+
+#define pr_fmt(fmt) "DMAR: " fmt
+
+#include <linux/iommu.h>
+
+#include "iommu.h"
+
+static void intel_nested_domain_free(struct iommu_domain *domain)
+{
+ kfree(to_dmar_domain(domain));
+}
+
+static const struct iommu_domain_ops intel_nested_domain_ops = {
+ .free = intel_nested_domain_free,
+};
+
+struct iommu_domain *intel_nested_domain_alloc(struct iommu_domain *s2_domain,
+ const union iommu_domain_user_data *user_data)
+{
+ const struct iommu_hwpt_intel_vtd *vtd = (struct iommu_hwpt_intel_vtd *)user_data;
+ struct dmar_domain *domain;
+
+ domain = kzalloc(sizeof(*domain), GFP_KERNEL_ACCOUNT);
+ if (!domain)
+ return NULL;
+
+ domain->use_first_level = true;
+ domain->s2_domain = to_dmar_domain(s2_domain);
+ domain->s1_pgtbl = vtd->pgtbl_addr;
+ domain->s1_cfg = *vtd;
+ domain->domain.ops = &intel_nested_domain_ops;
+ domain->domain.type = IOMMU_DOMAIN_NESTED;
+ INIT_LIST_HEAD(&domain->devices);
+ spin_lock_init(&domain->lock);
+ xa_init(&domain->iommu_array);
+
+ return &domain->domain;
+}
--
2.34.1
next prev parent reply other threads:[~2023-05-11 14:51 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-11 14:51 [PATCH v3 00/10] Add Intel VT-d nested translation Yi Liu
2023-05-11 14:51 ` [PATCH v3 01/10] iommufd: Add data structure for Intel VT-d stage-1 domain allocation Yi Liu
2023-05-24 6:59 ` Tian, Kevin
2023-05-25 2:28 ` Zhang, Tina
2023-05-29 20:00 ` Jason Gunthorpe
2023-05-29 19:53 ` Jason Gunthorpe
2023-05-11 14:51 ` [PATCH v3 02/10] iommu/vt-d: Extend dmar_domain to support nested domain Yi Liu
2023-05-24 7:02 ` Tian, Kevin
2023-05-26 2:56 ` Baolu Lu
2023-05-11 14:51 ` Yi Liu [this message]
2023-05-11 14:51 ` [PATCH v3 04/10] iommu/vt-d: Add helper to setup pasid nested translation Yi Liu
2023-05-24 7:16 ` Tian, Kevin
2023-05-26 4:16 ` Baolu Lu
2023-06-07 8:34 ` Liu, Yi L
2023-06-08 3:32 ` Liu, Yi L
2023-06-08 3:35 ` Liu, Yi L
2023-06-08 3:37 ` Baolu Lu
2023-05-11 14:51 ` [PATCH v3 05/10] iommu/vt-d: Make domain attach helpers to be extern Yi Liu
2023-05-11 14:51 ` [PATCH v3 06/10] iommu/vt-d: Set the nested domain to a device Yi Liu
2023-05-24 7:22 ` Tian, Kevin
2023-05-26 4:24 ` Baolu Lu
2023-05-11 14:51 ` [PATCH v3 07/10] iommu/vt-d: Add iotlb flush for nested domain Yi Liu
2023-05-24 7:33 ` Tian, Kevin
2023-06-08 7:14 ` Liu, Yi L
2023-06-08 8:07 ` Baolu Lu
2023-06-20 6:22 ` Liu, Yi L
2023-05-11 14:51 ` [PATCH v3 08/10] iommu/vt-d: Add nested domain allocation Yi Liu
2023-05-11 14:51 ` [PATCH v3 09/10] iommu/vt-d: Implement hw_info for iommu capability query Yi Liu
2023-05-11 14:51 ` [PATCH v3 10/10] iommu/vt-d: Disallow nesting on domains with read-only mappings Yi Liu
2023-05-24 7:44 ` Tian, Kevin
2023-05-26 4:28 ` Baolu Lu
2023-05-24 8:59 ` [PATCH v3 00/10] Add Intel VT-d nested translation Tian, Kevin
2023-05-25 18:06 ` Alex Williamson
2023-05-26 11:25 ` Tian, Kevin
2023-05-29 18:43 ` Jason Gunthorpe
2023-05-30 0:16 ` Alex Williamson
2023-05-30 16:42 ` Jason Gunthorpe
2023-06-14 8:07 ` Tian, Kevin
2023-06-14 11:52 ` Jason Gunthorpe
2023-06-16 2:29 ` Tian, Kevin
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