summaryrefslogtreecommitdiffstats
path: root/drivers/iommu/dmar.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2015-06-23 18:27:19 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-06-23 18:27:19 -0700
commit6eae81a5e2d6646a61146501fd3032a340863c1d (patch)
treec1c8a5fd7930f756d4d124870e0076903e3b4ba0 /drivers/iommu/dmar.c
parent54245ed870c8cf9ff87fdf78955ffbc93b261e9f (diff)
parent5ffde2f67181195d457b95df44b8f88e8d969d89 (diff)
downloadop-kernel-dev-6eae81a5e2d6646a61146501fd3032a340863c1d.zip
op-kernel-dev-6eae81a5e2d6646a61146501fd3032a340863c1d.tar.gz
Merge tag 'iommu-updates-v4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull IOMMU updates from Joerg Roedel: "This time with bigger changes than usual: - A new IOMMU driver for the ARM SMMUv3. This IOMMU is pretty different from SMMUv1 and v2 in that it is configured through in-memory structures and not through the MMIO register region. The ARM SMMUv3 also supports IO demand paging for PCI devices with PRI/PASID capabilities, but this is not implemented in the driver yet. - Lots of cleanups and device-tree support for the Exynos IOMMU driver. This is part of the effort to bring Exynos DRM support upstream. - Introduction of default domains into the IOMMU core code. The rationale behind this is to move functionalily out of the IOMMU drivers to common code to get to a unified behavior between different drivers. The patches here introduce a default domain for iommu-groups (isolation groups). A device will now always be attached to a domain, either the default domain or another domain handled by the device driver. The IOMMU drivers have to be modified to make use of that feature. So long the AMD IOMMU driver is converted, with others to follow. - Patches for the Intel VT-d drvier to fix DMAR faults that happen when a kdump kernel boots. When the kdump kernel boots it re-initializes the IOMMU hardware, which destroys all mappings from the crashed kernel. As this happens before the endpoint devices are re-initialized, any in-flight DMA causes a DMAR fault. These faults cause PCI master aborts, which some devices can't handle properly and go into an undefined state, so that the device driver in the kdump kernel fails to initialize them and the dump fails. This is now fixed by copying over the mapping structures (only context tables and interrupt remapping tables) from the old kernel and keep the old mappings in place until the device driver of the new kernel takes over. This emulates the the behavior without an IOMMU to the best degree possible. - A couple of other small fixes and cleanups" * tag 'iommu-updates-v4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (69 commits) iommu/amd: Handle large pages correctly in free_pagetable iommu/vt-d: Don't disable IR when it was previously enabled iommu/vt-d: Make sure copied over IR entries are not reused iommu/vt-d: Copy IR table from old kernel when in kdump mode iommu/vt-d: Set IRTA in intel_setup_irq_remapping iommu/vt-d: Disable IRQ remapping in intel_prepare_irq_remapping iommu/vt-d: Move QI initializationt to intel_setup_irq_remapping iommu/vt-d: Move EIM detection to intel_prepare_irq_remapping iommu/vt-d: Enable Translation only if it was previously disabled iommu/vt-d: Don't disable translation prior to OS handover iommu/vt-d: Don't copy translation tables if RTT bit needs to be changed iommu/vt-d: Don't do early domain assignment if kdump kernel iommu/vt-d: Allocate si_domain in init_dmars() iommu/vt-d: Mark copied context entries iommu/vt-d: Do not re-use domain-ids from the old kernel iommu/vt-d: Copy translation tables from old kernel iommu/vt-d: Detect pre enabled translation iommu/vt-d: Make root entry visible for hardware right after allocation iommu/vt-d: Init QI before root entry is allocated iommu/vt-d: Cleanup log messages ...
Diffstat (limited to 'drivers/iommu/dmar.c')
-rw-r--r--drivers/iommu/dmar.c28
1 files changed, 14 insertions, 14 deletions
diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c
index 536f2d8..c9db04d 100644
--- a/drivers/iommu/dmar.c
+++ b/drivers/iommu/dmar.c
@@ -26,7 +26,7 @@
* These routines are used by both DMA-remapping and Interrupt-remapping
*/
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt /* has to precede printk.h */
+#define pr_fmt(fmt) "DMAR: " fmt
#include <linux/pci.h>
#include <linux/dmar.h>
@@ -555,7 +555,7 @@ static int dmar_walk_remapping_entries(struct acpi_dmar_header *start,
break;
} else if (next > end) {
/* Avoid passing table end */
- pr_warn(FW_BUG "record passes table end\n");
+ pr_warn(FW_BUG "Record passes table end\n");
ret = -EINVAL;
break;
}
@@ -802,7 +802,7 @@ int __init dmar_table_init(void)
ret = parse_dmar_table();
if (ret < 0) {
if (ret != -ENODEV)
- pr_info("parse DMAR table failure.\n");
+ pr_info("Parse DMAR table failure.\n");
} else if (list_empty(&dmar_drhd_units)) {
pr_info("No DMAR devices found\n");
ret = -ENODEV;
@@ -847,7 +847,7 @@ dmar_validate_one_drhd(struct acpi_dmar_header *entry, void *arg)
else
addr = early_ioremap(drhd->address, VTD_PAGE_SIZE);
if (!addr) {
- pr_warn("IOMMU: can't validate: %llx\n", drhd->address);
+ pr_warn("Can't validate DRHD address: %llx\n", drhd->address);
return -EINVAL;
}
@@ -921,14 +921,14 @@ static int map_iommu(struct intel_iommu *iommu, u64 phys_addr)
iommu->reg_size = VTD_PAGE_SIZE;
if (!request_mem_region(iommu->reg_phys, iommu->reg_size, iommu->name)) {
- pr_err("IOMMU: can't reserve memory\n");
+ pr_err("Can't reserve memory\n");
err = -EBUSY;
goto out;
}
iommu->reg = ioremap(iommu->reg_phys, iommu->reg_size);
if (!iommu->reg) {
- pr_err("IOMMU: can't map the region\n");
+ pr_err("Can't map the region\n");
err = -ENOMEM;
goto release;
}
@@ -952,13 +952,13 @@ static int map_iommu(struct intel_iommu *iommu, u64 phys_addr)
iommu->reg_size = map_size;
if (!request_mem_region(iommu->reg_phys, iommu->reg_size,
iommu->name)) {
- pr_err("IOMMU: can't reserve memory\n");
+ pr_err("Can't reserve memory\n");
err = -EBUSY;
goto out;
}
iommu->reg = ioremap(iommu->reg_phys, iommu->reg_size);
if (!iommu->reg) {
- pr_err("IOMMU: can't map the region\n");
+ pr_err("Can't map the region\n");
err = -ENOMEM;
goto release;
}
@@ -1014,14 +1014,14 @@ static int alloc_iommu(struct dmar_drhd_unit *drhd)
return -ENOMEM;
if (dmar_alloc_seq_id(iommu) < 0) {
- pr_err("IOMMU: failed to allocate seq_id\n");
+ pr_err("Failed to allocate seq_id\n");
err = -ENOSPC;
goto error;
}
err = map_iommu(iommu, drhd->reg_base_addr);
if (err) {
- pr_err("IOMMU: failed to map %s\n", iommu->name);
+ pr_err("Failed to map %s\n", iommu->name);
goto error_free_seq_id;
}
@@ -1045,8 +1045,8 @@ static int alloc_iommu(struct dmar_drhd_unit *drhd)
iommu->node = -1;
ver = readl(iommu->reg + DMAR_VER_REG);
- pr_info("IOMMU %d: reg_base_addr %llx ver %d:%d cap %llx ecap %llx\n",
- iommu->seq_id,
+ pr_info("%s: reg_base_addr %llx ver %d:%d cap %llx ecap %llx\n",
+ iommu->name,
(unsigned long long)drhd->reg_base_addr,
DMAR_VER_MAJOR(ver), DMAR_VER_MINOR(ver),
(unsigned long long)iommu->cap,
@@ -1646,13 +1646,13 @@ int dmar_set_interrupt(struct intel_iommu *iommu)
if (irq > 0) {
iommu->irq = irq;
} else {
- pr_err("IOMMU: no free vectors\n");
+ pr_err("No free IRQ vectors\n");
return -EINVAL;
}
ret = request_irq(irq, dmar_fault, IRQF_NO_THREAD, iommu->name, iommu);
if (ret)
- pr_err("IOMMU: can't request irq\n");
+ pr_err("Can't request irq\n");
return ret;
}
OpenPOWER on IntegriCloud