path: root/drivers/iommu/iommu.c
diff options
authorLinus Torvalds <torvalds@linux-foundation.org>2013-11-15 14:02:18 +0900
committerLinus Torvalds <torvalds@linux-foundation.org>2013-11-15 14:02:18 +0900
commit91838e2dab460ba589fb90db0fe1f504f5c04f12 (patch)
tree53974ed7a32ddd63d75e2da63f00d8308eb8d08a /drivers/iommu/iommu.c
parentf080480488028bcc25357f85e8ae54ccc3bb7173 (diff)
parentbb51eeee5a947f61eeefaa55221c26460542654d (diff)
Merge tag 'iommu-updates-v3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull IOMMU updates from Joerg Roedel: "This time the updates contain: - Tracepoints for certain IOMMU-API functions to make their use easier to debug - A tracepoint for IOMMU page faults to make it easier to get them in user space - Updates and fixes for the new ARM SMMU driver after the first hardware showed up - Various other fixes and cleanups in other IOMMU drivers" * tag 'iommu-updates-v3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (26 commits) iommu/shmobile: Enable the driver on all ARM platforms iommu/tegra-smmu: Staticize tegra_smmu_pm_ops iommu/tegra-gart: Staticize tegra_gart_pm_ops iommu/vt-d: Use list_for_each_entry_safe() for dmar_domain->devices traversal iommu/vt-d: Use for_each_drhd_unit() instead of list_for_each_entry() iommu/vt-d: Fixed interaction of VFIO_IOMMU_MAP_DMA with IOMMU address limits iommu/arm-smmu: Clear global and context bank fault status registers iommu/arm-smmu: Print context fault information iommu/arm-smmu: Check for num_context_irqs > 0 to avoid divide by zero exception iommu/arm-smmu: Refine check for proper size of mapped region iommu/arm-smmu: Switch to subsys_initcall for driver registration iommu/arm-smmu: use relaxed accessors where possible iommu/arm-smmu: replace devm_request_and_ioremap by devm_ioremap_resource iommu: Remove stack trace from broken irq remapping warning iommu: Change iommu driver to call io_page_fault trace event iommu: Add iommu_error class event to iommu trace iommu/tegra: gart: cleanup devm_* functions usage iommu/tegra: Print phys_addr_t using %pa iommu: No need to pass '0x' when '%pa' is used iommu: Change iommu driver to call unmap trace event ...
Diffstat (limited to 'drivers/iommu/iommu.c')
1 files changed, 17 insertions, 4 deletions
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index fbe9ca734f8f..e5555fcfe703 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -29,6 +29,7 @@
#include <linux/idr.h>
#include <linux/notifier.h>
#include <linux/err.h>
+#include <trace/events/iommu.h>
static struct kset *iommu_group_kset;
static struct ida iommu_group_ida;
@@ -363,6 +364,8 @@ rename:
/* Notify any listeners about change to group. */
+ trace_add_device_to_group(group->id, dev);
return 0;
@@ -399,6 +402,8 @@ void iommu_group_remove_device(struct device *dev)
sysfs_remove_link(group->devices_kobj, device->name);
sysfs_remove_link(&dev->kobj, "iommu_group");
+ trace_remove_device_from_group(group->id, dev);
dev->iommu_group = NULL;
@@ -680,10 +685,14 @@ EXPORT_SYMBOL_GPL(iommu_domain_free);
int iommu_attach_device(struct iommu_domain *domain, struct device *dev)
+ int ret;
if (unlikely(domain->ops->attach_dev == NULL))
return -ENODEV;
- return domain->ops->attach_dev(domain, dev);
+ ret = domain->ops->attach_dev(domain, dev);
+ if (!ret)
+ trace_attach_device_to_domain(dev);
+ return ret;
@@ -693,6 +702,7 @@ void iommu_detach_device(struct iommu_domain *domain, struct device *dev)
domain->ops->detach_dev(domain, dev);
+ trace_detach_device_from_domain(dev);
@@ -807,17 +817,17 @@ int iommu_map(struct iommu_domain *domain, unsigned long iova,
* size of the smallest page supported by the hardware
if (!IS_ALIGNED(iova | paddr | size, min_pagesz)) {
- pr_err("unaligned: iova 0x%lx pa 0x%pa size 0x%zx min_pagesz 0x%x\n",
+ pr_err("unaligned: iova 0x%lx pa %pa size 0x%zx min_pagesz 0x%x\n",
iova, &paddr, size, min_pagesz);
return -EINVAL;
- pr_debug("map: iova 0x%lx pa 0x%pa size 0x%zx\n", iova, &paddr, size);
+ pr_debug("map: iova 0x%lx pa %pa size 0x%zx\n", iova, &paddr, size);
while (size) {
size_t pgsize = iommu_pgsize(domain, iova | paddr, size);
- pr_debug("mapping: iova 0x%lx pa 0x%pa pgsize 0x%zx\n",
+ pr_debug("mapping: iova 0x%lx pa %pa pgsize 0x%zx\n",
iova, &paddr, pgsize);
ret = domain->ops->map(domain, iova, paddr, pgsize, prot);
@@ -832,6 +842,8 @@ int iommu_map(struct iommu_domain *domain, unsigned long iova,
/* unroll mapping in case something went wrong */
if (ret)
iommu_unmap(domain, orig_iova, orig_size - size);
+ else
+ trace_map(iova, paddr, size);
return ret;
@@ -880,6 +892,7 @@ size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova, size_t size)
unmapped += unmapped_page;
+ trace_unmap(iova, 0, size);
return unmapped;

Privacy Policy