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authorLinus Torvalds <torvalds@linux-foundation.org>2021-03-05 12:26:24 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2021-03-05 12:26:24 -0800
commitfc2c8d0af05af4c380824e40ff99ede398913ae5 (patch)
treeeed47a8a06f7ba081138ded76e012eb733d0a01f
parentf09b04cc6447331e731629e8b72587287f3a4490 (diff)
parent444d66a23c1f1e4c4d12aed4812681d0ad835d60 (diff)
downloadlinux-stericsson-fc2c8d0af05af4c380824e40ff99ede398913ae5.tar.gz
Merge tag 'iommu-fixes-v5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull iommu fixes from Joerg Roedel: - Fix a sleeping-while-atomic issue in the AMD IOMMU code - Disable lazy IOTLB flush for untrusted devices in the Intel VT-d driver - Fix status code definitions for Intel VT-d - Fix IO Page Fault issue in Tegra IOMMU driver * tag 'iommu-fixes-v5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: iommu/vt-d: Fix status code for Allocate/Free PASID command iommu: Don't use lazy flush for untrusted device iommu/tegra-smmu: Fix mc errors on tegra124-nyan iommu/amd: Fix sleeping in atomic in increase_address_space()
-rw-r--r--drivers/iommu/amd/io_pgtable.c10
-rw-r--r--drivers/iommu/dma-iommu.c15
-rw-r--r--drivers/iommu/intel/pasid.h4
-rw-r--r--drivers/iommu/tegra-smmu.c72
4 files changed, 87 insertions, 14 deletions
diff --git a/drivers/iommu/amd/io_pgtable.c b/drivers/iommu/amd/io_pgtable.c
index 1c4961e05c12..bb0ee5c9fde7 100644
--- a/drivers/iommu/amd/io_pgtable.c
+++ b/drivers/iommu/amd/io_pgtable.c
@@ -182,6 +182,10 @@ static bool increase_address_space(struct protection_domain *domain,
bool ret = true;
u64 *pte;
+ pte = (void *)get_zeroed_page(gfp);
+ if (!pte)
+ return false;
+
spin_lock_irqsave(&domain->lock, flags);
if (address <= PM_LEVEL_SIZE(domain->iop.mode))
@@ -191,10 +195,6 @@ static bool increase_address_space(struct protection_domain *domain,
if (WARN_ON_ONCE(domain->iop.mode == PAGE_MODE_6_LEVEL))
goto out;
- pte = (void *)get_zeroed_page(gfp);
- if (!pte)
- goto out;
-
*pte = PM_LEVEL_PDE(domain->iop.mode, iommu_virt_to_phys(domain->iop.root));
domain->iop.root = pte;
@@ -208,10 +208,12 @@ static bool increase_address_space(struct protection_domain *domain,
*/
amd_iommu_domain_set_pgtable(domain, pte, domain->iop.mode);
+ pte = NULL;
ret = true;
out:
spin_unlock_irqrestore(&domain->lock, flags);
+ free_page((unsigned long)pte);
return ret;
}
diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index 9ab6ee22c110..af765c813cc8 100644
--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -311,6 +311,11 @@ static void iommu_dma_flush_iotlb_all(struct iova_domain *iovad)
domain->ops->flush_iotlb_all(domain);
}
+static bool dev_is_untrusted(struct device *dev)
+{
+ return dev_is_pci(dev) && to_pci_dev(dev)->untrusted;
+}
+
/**
* iommu_dma_init_domain - Initialise a DMA mapping domain
* @domain: IOMMU domain previously prepared by iommu_get_dma_cookie()
@@ -365,8 +370,9 @@ static int iommu_dma_init_domain(struct iommu_domain *domain, dma_addr_t base,
init_iova_domain(iovad, 1UL << order, base_pfn);
- if (!cookie->fq_domain && !iommu_domain_get_attr(domain,
- DOMAIN_ATTR_DMA_USE_FLUSH_QUEUE, &attr) && attr) {
+ if (!cookie->fq_domain && (!dev || !dev_is_untrusted(dev)) &&
+ !iommu_domain_get_attr(domain, DOMAIN_ATTR_DMA_USE_FLUSH_QUEUE, &attr) &&
+ attr) {
if (init_iova_flush_queue(iovad, iommu_dma_flush_iotlb_all,
iommu_dma_entry_dtor))
pr_warn("iova flush queue initialization failed\n");
@@ -508,11 +514,6 @@ static void __iommu_dma_unmap_swiotlb(struct device *dev, dma_addr_t dma_addr,
iova_align(iovad, size), dir, attrs);
}
-static bool dev_is_untrusted(struct device *dev)
-{
- return dev_is_pci(dev) && to_pci_dev(dev)->untrusted;
-}
-
static dma_addr_t __iommu_dma_map(struct device *dev, phys_addr_t phys,
size_t size, int prot, u64 dma_mask)
{
diff --git a/drivers/iommu/intel/pasid.h b/drivers/iommu/intel/pasid.h
index 97dfcffbf495..444c0bec221a 100644
--- a/drivers/iommu/intel/pasid.h
+++ b/drivers/iommu/intel/pasid.h
@@ -30,8 +30,8 @@
#define VCMD_VRSP_IP 0x1
#define VCMD_VRSP_SC(e) (((e) >> 1) & 0x3)
#define VCMD_VRSP_SC_SUCCESS 0
-#define VCMD_VRSP_SC_NO_PASID_AVAIL 1
-#define VCMD_VRSP_SC_INVALID_PASID 1
+#define VCMD_VRSP_SC_NO_PASID_AVAIL 2
+#define VCMD_VRSP_SC_INVALID_PASID 2
#define VCMD_VRSP_RESULT_PASID(e) (((e) >> 8) & 0xfffff)
#define VCMD_CMD_OPERAND(e) ((e) << 8)
/*
diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c
index 4a3f095a1c26..97eb62f667d2 100644
--- a/drivers/iommu/tegra-smmu.c
+++ b/drivers/iommu/tegra-smmu.c
@@ -798,10 +798,70 @@ static phys_addr_t tegra_smmu_iova_to_phys(struct iommu_domain *domain,
return SMMU_PFN_PHYS(pfn) + SMMU_OFFSET_IN_PAGE(iova);
}
+static struct tegra_smmu *tegra_smmu_find(struct device_node *np)
+{
+ struct platform_device *pdev;
+ struct tegra_mc *mc;
+
+ pdev = of_find_device_by_node(np);
+ if (!pdev)
+ return NULL;
+
+ mc = platform_get_drvdata(pdev);
+ if (!mc)
+ return NULL;
+
+ return mc->smmu;
+}
+
+static int tegra_smmu_configure(struct tegra_smmu *smmu, struct device *dev,
+ struct of_phandle_args *args)
+{
+ const struct iommu_ops *ops = smmu->iommu.ops;
+ int err;
+
+ err = iommu_fwspec_init(dev, &dev->of_node->fwnode, ops);
+ if (err < 0) {
+ dev_err(dev, "failed to initialize fwspec: %d\n", err);
+ return err;
+ }
+
+ err = ops->of_xlate(dev, args);
+ if (err < 0) {
+ dev_err(dev, "failed to parse SW group ID: %d\n", err);
+ iommu_fwspec_free(dev);
+ return err;
+ }
+
+ return 0;
+}
+
static struct iommu_device *tegra_smmu_probe_device(struct device *dev)
{
- struct tegra_smmu *smmu = dev_iommu_priv_get(dev);
+ struct device_node *np = dev->of_node;
+ struct tegra_smmu *smmu = NULL;
+ struct of_phandle_args args;
+ unsigned int index = 0;
+ int err;
+
+ while (of_parse_phandle_with_args(np, "iommus", "#iommu-cells", index,
+ &args) == 0) {
+ smmu = tegra_smmu_find(args.np);
+ if (smmu) {
+ err = tegra_smmu_configure(smmu, dev, &args);
+ of_node_put(args.np);
+ if (err < 0)
+ return ERR_PTR(err);
+
+ break;
+ }
+
+ of_node_put(args.np);
+ index++;
+ }
+
+ smmu = dev_iommu_priv_get(dev);
if (!smmu)
return ERR_PTR(-ENODEV);
@@ -1028,6 +1088,16 @@ struct tegra_smmu *tegra_smmu_probe(struct device *dev,
if (!smmu)
return ERR_PTR(-ENOMEM);
+ /*
+ * This is a bit of a hack. Ideally we'd want to simply return this
+ * value. However the IOMMU registration process will attempt to add
+ * all devices to the IOMMU when bus_set_iommu() is called. In order
+ * not to rely on global variables to track the IOMMU instance, we
+ * set it here so that it can be looked up from the .probe_device()
+ * callback via the IOMMU device's .drvdata field.
+ */
+ mc->smmu = smmu;
+
size = BITS_TO_LONGS(soc->num_asids) * sizeof(long);
smmu->asids = devm_kzalloc(dev, size, GFP_KERNEL);