From: Nicolin Chen <nicolinc@nvidia.com>
To: <jgg@nvidia.com>, <joro@8bytes.org>, <will@kernel.org>,
<marcan@marcan.st>, <sven@svenpeter.dev>, <robin.murphy@arm.com>,
<robdclark@gmail.com>, <m.szyprowski@samsung.com>,
<krzysztof.kozlowski@linaro.org>, <baolu.lu@linux.intel.com>,
<agross@kernel.org>, <bjorn.andersson@linaro.org>,
<matthias.bgg@gmail.com>, <heiko@sntech.de>,
<orsonzhai@gmail.com>, <baolin.wang7@gmail.com>,
<zhang.lyra@gmail.com>, <wens@csie.org>,
<jernej.skrabec@gmail.com>, <samuel@sholland.org>,
<jean-philippe@linaro.org>, <alex.williamson@redhat.com>
Cc: <suravee.suthikulpanit@amd.com>, <alyssa@rosenzweig.io>,
<alim.akhtar@samsung.com>, <dwmw2@infradead.org>,
<yong.wu@mediatek.com>, <mjrosato@linux.ibm.com>,
<gerald.schaefer@linux.ibm.com>, <thierry.reding@gmail.com>,
<vdumpa@nvidia.com>, <jonathanh@nvidia.com>, <cohuck@redhat.com>,
<iommu@lists.linux-foundation.org>,
<linux-kernel@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-arm-msm@vger.kernel.org>,
<linux-samsung-soc@vger.kernel.org>,
<linux-mediatek@lists.infradead.org>,
<linux-rockchip@lists.infradead.org>,
<linux-s390@vger.kernel.org>, <linux-sunxi@lists.linux.dev>,
<linux-tegra@vger.kernel.org>,
<virtualization@lists.linux-foundation.org>,
<kvm@vger.kernel.org>
Subject: [PATCH 2/5] iommu: Ensure device has the same iommu_ops as the domain
Date: Sun, 5 Jun 2022 23:19:24 -0700 [thread overview]
Message-ID: <20220606061927.26049-3-nicolinc@nvidia.com> (raw)
In-Reply-To: <20220606061927.26049-1-nicolinc@nvidia.com>
The core code should not call an iommu driver op with a struct device
parameter unless it knows that the dev_iommu_priv_get() for that struct
device was setup by the same driver. Otherwise in a mixed driver system
the iommu_priv could be casted to the wrong type.
Store the iommu_ops pointer in the iommu_domain and use it as a check to
validate that the struct device is correct before invoking any domain op
that accepts a struct device.
This allows removing the check of the domain op equality in VFIO.
Co-developed-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
---
drivers/iommu/amd/iommu.c | 1 +
drivers/iommu/apple-dart.c | 1 +
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 1 +
drivers/iommu/arm/arm-smmu/arm-smmu.c | 1 +
drivers/iommu/arm/arm-smmu/qcom_iommu.c | 1 +
drivers/iommu/exynos-iommu.c | 1 +
drivers/iommu/fsl_pamu_domain.c | 1 +
drivers/iommu/intel/iommu.c | 1 +
drivers/iommu/iommu.c | 4 ++++
drivers/iommu/ipmmu-vmsa.c | 1 +
drivers/iommu/msm_iommu.c | 1 +
drivers/iommu/mtk_iommu.c | 1 +
drivers/iommu/mtk_iommu_v1.c | 1 +
drivers/iommu/omap-iommu.c | 1 +
drivers/iommu/rockchip-iommu.c | 1 +
drivers/iommu/s390-iommu.c | 1 +
drivers/iommu/sprd-iommu.c | 1 +
drivers/iommu/sun50i-iommu.c | 1 +
drivers/iommu/tegra-gart.c | 1 +
drivers/iommu/tegra-smmu.c | 1 +
drivers/iommu/virtio-iommu.c | 1 +
include/linux/iommu.h | 2 ++
22 files changed, 26 insertions(+)
diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index ad499658a6b6..679f7a265013 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -2285,6 +2285,7 @@ const struct iommu_ops amd_iommu_ops = {
.pgsize_bitmap = AMD_IOMMU_PGSIZES,
.def_domain_type = amd_iommu_def_domain_type,
.default_domain_ops = &(const struct iommu_domain_ops) {
+ .iommu_ops = &amd_iommu_ops,
.attach_dev = amd_iommu_attach_device,
.detach_dev = amd_iommu_detach_device,
.map = amd_iommu_map,
diff --git a/drivers/iommu/apple-dart.c b/drivers/iommu/apple-dart.c
index e58dc310afd7..3d36d9a12aa7 100644
--- a/drivers/iommu/apple-dart.c
+++ b/drivers/iommu/apple-dart.c
@@ -775,6 +775,7 @@ static const struct iommu_ops apple_dart_iommu_ops = {
.pgsize_bitmap = -1UL, /* Restricted during dart probe */
.owner = THIS_MODULE,
.default_domain_ops = &(const struct iommu_domain_ops) {
+ .iommu_ops = &apple_dart_iommu_ops,
.attach_dev = apple_dart_attach_dev,
.detach_dev = apple_dart_detach_dev,
.map_pages = apple_dart_map_pages,
diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
index 6c393cd84925..471ceb60427c 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -2859,6 +2859,7 @@ static struct iommu_ops arm_smmu_ops = {
.pgsize_bitmap = -1UL, /* Restricted during device attach */
.owner = THIS_MODULE,
.default_domain_ops = &(const struct iommu_domain_ops) {
+ .iommu_ops = &arm_smmu_ops,
.attach_dev = arm_smmu_attach_dev,
.map_pages = arm_smmu_map_pages,
.unmap_pages = arm_smmu_unmap_pages,
diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.c b/drivers/iommu/arm/arm-smmu/arm-smmu.c
index 2ed3594f384e..52c2589a4deb 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu.c
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu.c
@@ -1597,6 +1597,7 @@ static struct iommu_ops arm_smmu_ops = {
.pgsize_bitmap = -1UL, /* Restricted during device attach */
.owner = THIS_MODULE,
.default_domain_ops = &(const struct iommu_domain_ops) {
+ .iommu_ops = &arm_smmu_ops,
.attach_dev = arm_smmu_attach_dev,
.map_pages = arm_smmu_map_pages,
.unmap_pages = arm_smmu_unmap_pages,
diff --git a/drivers/iommu/arm/arm-smmu/qcom_iommu.c b/drivers/iommu/arm/arm-smmu/qcom_iommu.c
index a8b63b855ffb..8806a621f81e 100644
--- a/drivers/iommu/arm/arm-smmu/qcom_iommu.c
+++ b/drivers/iommu/arm/arm-smmu/qcom_iommu.c
@@ -596,6 +596,7 @@ static const struct iommu_ops qcom_iommu_ops = {
.of_xlate = qcom_iommu_of_xlate,
.pgsize_bitmap = SZ_4K | SZ_64K | SZ_1M | SZ_16M,
.default_domain_ops = &(const struct iommu_domain_ops) {
+ .iommu_ops = &qcom_iommu_ops,
.attach_dev = qcom_iommu_attach_dev,
.detach_dev = qcom_iommu_detach_dev,
.map = qcom_iommu_map,
diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
index 71f2018e23fe..fa93f94313e3 100644
--- a/drivers/iommu/exynos-iommu.c
+++ b/drivers/iommu/exynos-iommu.c
@@ -1315,6 +1315,7 @@ static const struct iommu_ops exynos_iommu_ops = {
.pgsize_bitmap = SECT_SIZE | LPAGE_SIZE | SPAGE_SIZE,
.of_xlate = exynos_iommu_of_xlate,
.default_domain_ops = &(const struct iommu_domain_ops) {
+ .iommu_ops = &exynos_iommu_ops,
.attach_dev = exynos_iommu_attach_device,
.detach_dev = exynos_iommu_detach_device,
.map = exynos_iommu_map,
diff --git a/drivers/iommu/fsl_pamu_domain.c b/drivers/iommu/fsl_pamu_domain.c
index 94b4589dc67c..7bdce4168d2c 100644
--- a/drivers/iommu/fsl_pamu_domain.c
+++ b/drivers/iommu/fsl_pamu_domain.c
@@ -458,6 +458,7 @@ static const struct iommu_ops fsl_pamu_ops = {
.release_device = fsl_pamu_release_device,
.device_group = fsl_pamu_device_group,
.default_domain_ops = &(const struct iommu_domain_ops) {
+ .iommu_ops = &fsl_pamu_ops,
.attach_dev = fsl_pamu_attach_device,
.detach_dev = fsl_pamu_detach_device,
.iova_to_phys = fsl_pamu_iova_to_phys,
diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index 0813b119d680..c6022484ca2d 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -4925,6 +4925,7 @@ const struct iommu_ops intel_iommu_ops = {
.page_response = intel_svm_page_response,
#endif
.default_domain_ops = &(const struct iommu_domain_ops) {
+ .iommu_ops = &intel_iommu_ops,
.attach_dev = intel_iommu_attach_device,
.detach_dev = intel_iommu_detach_device,
.map_pages = intel_iommu_map_pages,
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 19cf28d40ebe..8a1f437a51f2 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -1963,6 +1963,10 @@ static int __iommu_attach_device(struct iommu_domain *domain,
{
int ret;
+ /* Ensure the device was probe'd onto the same driver as the domain */
+ if (dev->bus->iommu_ops != domain->ops->iommu_ops)
+ return -EMEDIUMTYPE;
+
if (unlikely(domain->ops->attach_dev == NULL))
return -ENODEV;
diff --git a/drivers/iommu/ipmmu-vmsa.c b/drivers/iommu/ipmmu-vmsa.c
index e491e410add5..767b93da5800 100644
--- a/drivers/iommu/ipmmu-vmsa.c
+++ b/drivers/iommu/ipmmu-vmsa.c
@@ -877,6 +877,7 @@ static const struct iommu_ops ipmmu_ops = {
.pgsize_bitmap = SZ_1G | SZ_2M | SZ_4K,
.of_xlate = ipmmu_of_xlate,
.default_domain_ops = &(const struct iommu_domain_ops) {
+ .iommu_ops = &ipmmu_ops,
.attach_dev = ipmmu_attach_device,
.detach_dev = ipmmu_detach_device,
.map = ipmmu_map,
diff --git a/drivers/iommu/msm_iommu.c b/drivers/iommu/msm_iommu.c
index f09aedfdd462..29f6a6d5691e 100644
--- a/drivers/iommu/msm_iommu.c
+++ b/drivers/iommu/msm_iommu.c
@@ -682,6 +682,7 @@ static struct iommu_ops msm_iommu_ops = {
.pgsize_bitmap = MSM_IOMMU_PGSIZES,
.of_xlate = qcom_iommu_of_xlate,
.default_domain_ops = &(const struct iommu_domain_ops) {
+ .iommu_ops = &msm_iommu_ops,
.attach_dev = msm_iommu_attach_dev,
.detach_dev = msm_iommu_detach_dev,
.map = msm_iommu_map,
diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index bb9dd92c9898..c5c45f65077d 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -937,6 +937,7 @@ static const struct iommu_ops mtk_iommu_ops = {
.pgsize_bitmap = SZ_4K | SZ_64K | SZ_1M | SZ_16M,
.owner = THIS_MODULE,
.default_domain_ops = &(const struct iommu_domain_ops) {
+ .iommu_ops = &mtk_iommu_ops,
.attach_dev = mtk_iommu_attach_device,
.detach_dev = mtk_iommu_detach_device,
.map = mtk_iommu_map,
diff --git a/drivers/iommu/mtk_iommu_v1.c b/drivers/iommu/mtk_iommu_v1.c
index e1cb51b9866c..77c53580f730 100644
--- a/drivers/iommu/mtk_iommu_v1.c
+++ b/drivers/iommu/mtk_iommu_v1.c
@@ -594,6 +594,7 @@ static const struct iommu_ops mtk_iommu_v1_ops = {
.pgsize_bitmap = ~0UL << MT2701_IOMMU_PAGE_SHIFT,
.owner = THIS_MODULE,
.default_domain_ops = &(const struct iommu_domain_ops) {
+ .iommu_ops = &mtk_iommu_v1_ops,
.attach_dev = mtk_iommu_v1_attach_device,
.detach_dev = mtk_iommu_v1_detach_device,
.map = mtk_iommu_v1_map,
diff --git a/drivers/iommu/omap-iommu.c b/drivers/iommu/omap-iommu.c
index bbc6c4cd7aae..a0bf85ccebcd 100644
--- a/drivers/iommu/omap-iommu.c
+++ b/drivers/iommu/omap-iommu.c
@@ -1739,6 +1739,7 @@ static const struct iommu_ops omap_iommu_ops = {
.device_group = omap_iommu_device_group,
.pgsize_bitmap = OMAP_IOMMU_PGSIZES,
.default_domain_ops = &(const struct iommu_domain_ops) {
+ .iommu_ops = &omap_iommu_ops,
.attach_dev = omap_iommu_attach_dev,
.detach_dev = omap_iommu_detach_dev,
.map = omap_iommu_map,
diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c
index ab57c4b8fade..5f5387e902e0 100644
--- a/drivers/iommu/rockchip-iommu.c
+++ b/drivers/iommu/rockchip-iommu.c
@@ -1193,6 +1193,7 @@ static const struct iommu_ops rk_iommu_ops = {
.pgsize_bitmap = RK_IOMMU_PGSIZE_BITMAP,
.of_xlate = rk_iommu_of_xlate,
.default_domain_ops = &(const struct iommu_domain_ops) {
+ .iommu_ops = &rk_iommu_ops,
.attach_dev = rk_iommu_attach_device,
.detach_dev = rk_iommu_detach_device,
.map = rk_iommu_map,
diff --git a/drivers/iommu/s390-iommu.c b/drivers/iommu/s390-iommu.c
index c898bcbbce11..62e6d152b0a0 100644
--- a/drivers/iommu/s390-iommu.c
+++ b/drivers/iommu/s390-iommu.c
@@ -377,6 +377,7 @@ static const struct iommu_ops s390_iommu_ops = {
.device_group = generic_device_group,
.pgsize_bitmap = S390_IOMMU_PGSIZES,
.default_domain_ops = &(const struct iommu_domain_ops) {
+ .iommu_ops = &s390_iommu_ops,
.attach_dev = s390_iommu_attach_device,
.detach_dev = s390_iommu_detach_device,
.map = s390_iommu_map,
diff --git a/drivers/iommu/sprd-iommu.c b/drivers/iommu/sprd-iommu.c
index bd409bab6286..6e8ca34d6a00 100644
--- a/drivers/iommu/sprd-iommu.c
+++ b/drivers/iommu/sprd-iommu.c
@@ -423,6 +423,7 @@ static const struct iommu_ops sprd_iommu_ops = {
.pgsize_bitmap = ~0UL << SPRD_IOMMU_PAGE_SHIFT,
.owner = THIS_MODULE,
.default_domain_ops = &(const struct iommu_domain_ops) {
+ .iommu_ops = &sprd_iommu_ops,
.attach_dev = sprd_iommu_attach_device,
.detach_dev = sprd_iommu_detach_device,
.map = sprd_iommu_map,
diff --git a/drivers/iommu/sun50i-iommu.c b/drivers/iommu/sun50i-iommu.c
index c54ab477b8fd..560cff8e0f04 100644
--- a/drivers/iommu/sun50i-iommu.c
+++ b/drivers/iommu/sun50i-iommu.c
@@ -766,6 +766,7 @@ static const struct iommu_ops sun50i_iommu_ops = {
.probe_device = sun50i_iommu_probe_device,
.release_device = sun50i_iommu_release_device,
.default_domain_ops = &(const struct iommu_domain_ops) {
+ .iommu_ops = &sun50i_iommu_ops,
.attach_dev = sun50i_iommu_attach_device,
.detach_dev = sun50i_iommu_detach_device,
.flush_iotlb_all = sun50i_iommu_flush_iotlb_all,
diff --git a/drivers/iommu/tegra-gart.c b/drivers/iommu/tegra-gart.c
index a6700a40a6f8..cd4553611cc9 100644
--- a/drivers/iommu/tegra-gart.c
+++ b/drivers/iommu/tegra-gart.c
@@ -278,6 +278,7 @@ static const struct iommu_ops gart_iommu_ops = {
.pgsize_bitmap = GART_IOMMU_PGSIZES,
.of_xlate = gart_iommu_of_xlate,
.default_domain_ops = &(const struct iommu_domain_ops) {
+ .iommu_ops = &gart_iommu_ops,
.attach_dev = gart_iommu_attach_dev,
.detach_dev = gart_iommu_detach_dev,
.map = gart_iommu_map,
diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c
index 2f2b12033618..67c101d1ad66 100644
--- a/drivers/iommu/tegra-smmu.c
+++ b/drivers/iommu/tegra-smmu.c
@@ -971,6 +971,7 @@ static const struct iommu_ops tegra_smmu_ops = {
.of_xlate = tegra_smmu_of_xlate,
.pgsize_bitmap = SZ_4K,
.default_domain_ops = &(const struct iommu_domain_ops) {
+ .iommu_ops = &tegra_smmu_ops,
.attach_dev = tegra_smmu_attach_dev,
.detach_dev = tegra_smmu_detach_dev,
.map = tegra_smmu_map,
diff --git a/drivers/iommu/virtio-iommu.c b/drivers/iommu/virtio-iommu.c
index e3b812d8fa96..703d87922786 100644
--- a/drivers/iommu/virtio-iommu.c
+++ b/drivers/iommu/virtio-iommu.c
@@ -1017,6 +1017,7 @@ static struct iommu_ops viommu_ops = {
.of_xlate = viommu_of_xlate,
.owner = THIS_MODULE,
.default_domain_ops = &(const struct iommu_domain_ops) {
+ .iommu_ops = &viommu_ops,
.attach_dev = viommu_attach_dev,
.map = viommu_map,
.unmap = viommu_unmap,
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 5e1afe169549..77deaf4fc7f8 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -261,6 +261,7 @@ struct iommu_ops {
/**
* struct iommu_domain_ops - domain specific operations
+ * @iommu_ops: Pointer to the ops associated with compatible devices
* @attach_dev: attach an iommu domain to a device
* @detach_dev: detach an iommu domain from a device
* @map: map a physically contiguous memory region to an iommu domain
@@ -281,6 +282,7 @@ struct iommu_ops {
* @free: Release the domain after use.
*/
struct iommu_domain_ops {
+ const struct iommu_ops *iommu_ops;
int (*attach_dev)(struct iommu_domain *domain, struct device *dev);
void (*detach_dev)(struct iommu_domain *domain, struct device *dev);
--
2.17.1
next prev parent reply other threads:[~2022-06-06 6:20 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-06 6:19 [PATCH 0/5] Simplify vfio_iommu_type1 attach/detach routine Nicolin Chen
2022-06-06 6:19 ` [PATCH 1/5] iommu: Return -EMEDIUMTYPE for incompatible domain and device/group Nicolin Chen
2022-06-07 3:23 ` Baolu Lu
2022-06-07 4:03 ` Nicolin Chen
2022-06-08 7:49 ` Tian, Kevin
2022-06-08 17:38 ` Nicolin Chen
2022-06-06 6:19 ` Nicolin Chen [this message]
2022-06-06 14:33 ` [PATCH 2/5] iommu: Ensure device has the same iommu_ops as the domain Robin Murphy
2022-06-06 16:51 ` Nicolin Chen
2022-06-06 17:50 ` Robin Murphy
2022-06-06 18:28 ` Nicolin Chen
2022-06-06 18:52 ` Jason Gunthorpe
2022-06-06 6:19 ` [PATCH 3/5] vfio/iommu_type1: Prefer to reuse domains vs match enforced cache coherency Nicolin Chen
2022-06-08 8:28 ` Tian, Kevin
2022-06-08 11:17 ` Jason Gunthorpe
2022-06-08 23:48 ` Tian, Kevin
2022-06-14 20:45 ` Nicolin Chen
2022-06-15 7:35 ` Tian, Kevin
2022-06-15 23:12 ` Nicolin Chen
2022-06-06 6:19 ` [PATCH 4/5] vfio/iommu_type1: Clean up update_dirty_scope in detach_group() Nicolin Chen
2022-06-08 8:35 ` Tian, Kevin
2022-06-08 17:46 ` Nicolin Chen
2022-06-06 6:19 ` [PATCH 5/5] vfio/iommu_type1: Simplify group attachment Nicolin Chen
2022-06-07 7:44 ` [PATCH 0/5] Simplify vfio_iommu_type1 attach/detach routine Baolu Lu
2022-06-07 11:58 ` Jason Gunthorpe
2022-06-07 12:42 ` Baolu Lu
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