projects/linux·commit 6b04014f

Merge tag 'iommu-updates-v5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu

6b04014f · Linus Torvalds <[email protected]> · 2019-07-09 09:21:02 -07:00

Pull iommu updates from Joerg Roedel:

 - Make the dma-iommu code more generic so that it can be used outside
   of the ARM context with other IOMMU drivers. Goal is to make use of
   it on x86 too.

 - Generic IOMMU domain support for the Intel VT-d driver. This driver
   now makes more use of common IOMMU code to allocate default domains
   for the devices it handles.

 - An IOMMU fault reporting API to userspace. With that the IOMMU fault
   handling can be done in user-space, for example to forward the faults
   to a VM.

 - Better handling for reserved regions requested by the firmware. These
   can be 'relaxed' now, meaning that those don't prevent a device being
   attached to a VM.

 - Suspend/Resume support for the Renesas IOMMU driver.

 - Added support for dumping SVA related fields of the DMAR table in the
   Intel VT-d driver via debugfs.

 - A pile of smaller fixes and cleanups.

* tag 'iommu-updates-v5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (90 commits)
  iommu/omap: No need to check return value of debugfs_create functions
  iommu/arm-smmu-v3: Invalidate ATC when detaching a device
  iommu/arm-smmu-v3: Fix compilation when CONFIG_CMA=n
  iommu/vt-d: Cleanup unused variable
  iommu/amd: Flush not present cache in iommu_map_page
  iommu/amd: Only free resources once on init error
  iommu/amd: Move gart fallback to amd_iommu_init
  iommu/amd: Make iommu_disable safer
  iommu/io-pgtable: Support non-coherent page tables
  iommu/io-pgtable: Replace IO_PGTABLE_QUIRK_NO_DMA with specific flag
  iommu/io-pgtable-arm: Add support to use system cache
  iommu/arm-smmu-v3: Increase maximum size of queues
  iommu/vt-d: Silence a variable set but not used
  iommu/vt-d: Remove an unused variable "length"
  iommu: Fix integer truncation
  iommu: Add padding to struct iommu_fault
  iommu/vt-d: Consolidate domain_init() to avoid duplication
  iommu/vt-d: Cleanup after delegating DMA domain to generic iommu
  iommu/vt-d: Fix suspicious RCU usage in probe_acpi_namespace_devices()
  iommu/vt-d: Allow DMA domain attaching to rmrr locked device
  ...
Commit
6b04014f3f151ed62878327813859e76e8e23d78
Parents
c6b6cebb · d95c3885

Merge commit. Changes below are compared with the first parent: c6b6cebb.

Changes

26 files changed · +1772 −1301

FileStatusAddDelContent
Documentation/ABI/testing/sysfs-kernel-iommu_groupsmodified+9−0View file
arch/arm64/mm/dma-mapping.cmodified+4−408View file
drivers/iommu/amd_iommu.cmodified+19−7View file
drivers/iommu/amd_iommu_init.cmodified+24−21View file
drivers/iommu/arm-smmu-v3.cmodified+49−20View file
drivers/iommu/arm-smmu.cmodified+1−3View file
drivers/iommu/dma-iommu.cmodified+368−90View file
drivers/iommu/intel-iommu-debugfs.cmodified+113−24View file
drivers/iommu/intel-iommu.cmodified+423−517View file
drivers/iommu/intel-pasid.cmodified+0−17View file
drivers/iommu/intel-pasid.hmodified+26−0View file
drivers/iommu/intel-svm.cmodified+15−0View file
drivers/iommu/intel_irq_remapping.cmodified+2−2View file
drivers/iommu/io-pgtable-arm-v7s.cmodified+10−7View file
drivers/iommu/io-pgtable-arm.cmodified+25−15View file
drivers/iommu/iommu.cmodified+273−25View file
drivers/iommu/ipmmu-vmsa.cmodified+125−61View file
drivers/iommu/omap-iommu-debug.cmodified+6−29View file
drivers/iommu/omap-iommu.cmodified+1−2View file
include/linux/device.hmodified+3−0View file
include/linux/dma-iommu.hmodified+5−44View file
include/linux/intel-iommu.hmodified+6−1View file
include/linux/intel-svm.hmodified+1−1View file
include/linux/io-pgtable.hmodified+4−7View file
include/linux/iommu.hmodified+105−0View file
include/uapi/linux/iommu.hadded+155−0View file

Only the first 600 diff lines are shown. Download the complete patch.

Documentation/ABI/testing/sysfs-kernel-iommu_groups

View file
diff --git a/Documentation/ABI/testing/sysfs-kernel-iommu_groups b/Documentation/ABI/testing/sysfs-kernel-iommu_groups
index 35c64e0..017f5bc 100644
--- a/Documentation/ABI/testing/sysfs-kernel-iommu_groups
+++ b/Documentation/ABI/testing/sysfs-kernel-iommu_groups
@@ -24,3 +24,12 @@ Description: /sys/kernel/iommu_groups/reserved_regions list IOVA
region is described on a single line: the 1st field is
the base IOVA, the second is the end IOVA and the third
field describes the type of the region.
+
+What: /sys/kernel/iommu_groups/reserved_regions
+Date: June 2019
+KernelVersion: v5.3
+Contact: Eric Auger <[email protected]>
+Description: In case an RMRR is used only by graphics or USB devices
+ it is now exposed as "direct-relaxable" instead of "direct".
+ In device assignment use case, for instance, those RMRR
+ are considered to be relaxable and safe.

arch/arm64/mm/dma-mapping.c

View file
diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c
index 1d17dbe..1d3f0b5 100644
--- a/arch/arm64/mm/dma-mapping.c
+++ b/arch/arm64/mm/dma-mapping.c
@@ -1,24 +1,13 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
- * SWIOTLB-based DMA API implementation
- *
* Copyright (C) 2012 ARM Ltd.
* Author: Catalin Marinas <[email protected]>
*/
#include <linux/gfp.h>
-#include <linux/acpi.h>
-#include <linux/memblock.h>
#include <linux/cache.h>
-#include <linux/export.h>
-#include <linux/slab.h>
-#include <linux/genalloc.h>
-#include <linux/dma-direct.h>
#include <linux/dma-noncoherent.h>
-#include <linux/dma-contiguous.h>
-#include <linux/vmalloc.h>
-#include <linux/swiotlb.h>
-#include <linux/pci.h>
+#include <linux/dma-iommu.h>
#include <asm/cacheflush.h>
@@ -47,37 +36,6 @@ void arch_dma_prep_coherent(struct page *page, size_t size)
__dma_flush_area(page_address(page), size);
}
-#ifdef CONFIG_IOMMU_DMA
-static int __swiotlb_get_sgtable_page(struct sg_table *sgt,
- struct page *page, size_t size)
-{
- int ret = sg_alloc_table(sgt, 1, GFP_KERNEL);
-
- if (!ret)
- sg_set_page(sgt->sgl, page, PAGE_ALIGN(size), 0);
-
- return ret;
-}
-
-static int __swiotlb_mmap_pfn(struct vm_area_struct *vma,
- unsigned long pfn, size_t size)
-{
- int ret = -ENXIO;
- unsigned long nr_vma_pages = vma_pages(vma);
- unsigned long nr_pages = PAGE_ALIGN(size) >> PAGE_SHIFT;
- unsigned long off = vma->vm_pgoff;
-
- if (off < nr_pages && nr_vma_pages <= (nr_pages - off)) {
- ret = remap_pfn_range(vma, vma->vm_start,
- pfn + off,
- vma->vm_end - vma->vm_start,
- vma->vm_page_prot);
- }
-
- return ret;
-}
-#endif /* CONFIG_IOMMU_DMA */
-
static int __init arm64_dma_init(void)
{
return dma_atomic_pool_init(GFP_DMA32, __pgprot(PROT_NORMAL_NC));
@@ -85,374 +43,11 @@ static int __init arm64_dma_init(void)
arch_initcall(arm64_dma_init);
#ifdef CONFIG_IOMMU_DMA
-#include <linux/dma-iommu.h>
-#include <linux/platform_device.h>
-#include <linux/amba/bus.h>
-
-/* Thankfully, all cache ops are by VA so we can ignore phys here */
-static void flush_page(struct device *dev, const void *virt, phys_addr_t phys)
-{
- __dma_flush_area(virt, PAGE_SIZE);
-}
-
-static void *__iommu_alloc_attrs(struct device *dev, size_t size,
- dma_addr_t *handle, gfp_t gfp,
- unsigned long attrs)
-{
- bool coherent = dev_is_dma_coherent(dev);
- int ioprot = dma_info_to_prot(DMA_BIDIRECTIONAL, coherent, attrs);
- size_t iosize = size;
- void *addr;
-
- if (WARN(!dev, "cannot create IOMMU mapping for unknown device\n"))
- return NULL;
-
- size = PAGE_ALIGN(size);
-
- /*
- * Some drivers rely on this, and we probably don't want the
- * possibility of stale kernel data being read by devices anyway.
- */
- gfp |= __GFP_ZERO;
-
- if (!gfpflags_allow_blocking(gfp)) {
- struct page *page;
- /*
- * In atomic context we can't remap anything, so we'll only
- * get the virtually contiguous buffer we need by way of a
- * physically contiguous allocation.
- */
- if (coherent) {
- page = alloc_pages(gfp, get_order(size));
- addr = page ? page_address(page) : NULL;
- } else {
- addr = dma_alloc_from_pool(size, &page, gfp);
- }
- if (!addr)
- return NULL;
-
- *handle = iommu_dma_map_page(dev, page, 0, iosize, ioprot);
- if (*handle == DMA_MAPPING_ERROR) {
- if (coherent)
- __free_pages(page, get_order(size));
- else
- dma_free_from_pool(addr, size);
- addr = NULL;
- }
- } else if (attrs & DMA_ATTR_FORCE_CONTIGUOUS) {
- pgprot_t prot = arch_dma_mmap_pgprot(dev, PAGE_KERNEL, attrs);
- struct page *page;
-
- page = dma_alloc_from_contiguous(dev, size >> PAGE_SHIFT,
- get_order(size), gfp & __GFP_NOWARN);
- if (!page)
- return NULL;
-
- *handle = iommu_dma_map_page(dev, page, 0, iosize, ioprot);
- if (*handle == DMA_MAPPING_ERROR) {
- dma_release_from_contiguous(dev, page,
- size >> PAGE_SHIFT);
- return NULL;
- }
- addr = dma_common_contiguous_remap(page, size, VM_USERMAP,
- prot,
- __builtin_return_address(0));
- if (addr) {
- if (!coherent)
- __dma_flush_area(page_to_virt(page), iosize);
- memset(addr, 0, size);
- } else {
- iommu_dma_unmap_page(dev, *handle, iosize, 0, attrs);
- dma_release_from_contiguous(dev, page,
- size >> PAGE_SHIFT);
- }
- } else {
- pgprot_t prot = arch_dma_mmap_pgprot(dev, PAGE_KERNEL, attrs);
- struct page **pages;
-
- pages = iommu_dma_alloc(dev, iosize, gfp, attrs, ioprot,
- handle, flush_page);
- if (!pages)
- return NULL;
-
- addr = dma_common_pages_remap(pages, size, VM_USERMAP, prot,
- __builtin_return_address(0));
- if (!addr)
- iommu_dma_free(dev, pages, iosize, handle);
- }
- return addr;
-}
-
-static void __iommu_free_attrs(struct device *dev, size_t size, void *cpu_addr,
- dma_addr_t handle, unsigned long attrs)
-{
- size_t iosize = size;
-
- size = PAGE_ALIGN(size);
- /*
- * @cpu_addr will be one of 4 things depending on how it was allocated:
- * - A remapped array of pages for contiguous allocations.
- * - A remapped array of pages from iommu_dma_alloc(), for all
- * non-atomic allocations.
- * - A non-cacheable alias from the atomic pool, for atomic
- * allocations by non-coherent devices.
- * - A normal lowmem address, for atomic allocations by
- * coherent devices.
- * Hence how dodgy the below logic looks...
- */
- if (dma_in_atomic_pool(cpu_addr, size)) {
- iommu_dma_unmap_page(dev, handle, iosize, 0, 0);
- dma_free_from_pool(cpu_addr, size);
- } else if (attrs & DMA_ATTR_FORCE_CONTIGUOUS) {
- struct page *page = vmalloc_to_page(cpu_addr);
-
- iommu_dma_unmap_page(dev, handle, iosize, 0, attrs);
- dma_release_from_contiguous(dev, page, size >> PAGE_SHIFT);
- dma_common_free_remap(cpu_addr, size, VM_USERMAP);
- } else if (is_vmalloc_addr(cpu_addr)){
- struct vm_struct *area = find_vm_area(cpu_addr);
-
- if (WARN_ON(!area || !area->pages))
- return;
- iommu_dma_free(dev, area->pages, iosize, &handle);
- dma_common_free_remap(cpu_addr, size, VM_USERMAP);
- } else {
- iommu_dma_unmap_page(dev, handle, iosize, 0, 0);
- __free_pages(virt_to_page(cpu_addr), get_order(size));
- }
-}
-
-static int __iommu_mmap_attrs(struct device *dev, struct vm_area_struct *vma,
- void *cpu_addr, dma_addr_t dma_addr, size_t size,
- unsigned long attrs)
-{
- struct vm_struct *area;
- int ret;
-
- vma->vm_page_prot = arch_dma_mmap_pgprot(dev, vma->vm_page_prot, attrs);
-
- if (dma_mmap_from_dev_coherent(dev, vma, cpu_addr, size, &ret))
- return ret;
-
- if (!is_vmalloc_addr(cpu_addr)) {
- unsigned long pfn = page_to_pfn(virt_to_page(cpu_addr));
- return __swiotlb_mmap_pfn(vma, pfn, size);
- }
-
- if (attrs & DMA_ATTR_FORCE_CONTIGUOUS) {
- /*
- * DMA_ATTR_FORCE_CONTIGUOUS allocations are always remapped,
- * hence in the vmalloc space.
- */
- unsigned long pfn = vmalloc_to_pfn(cpu_addr);
- return __swiotlb_mmap_pfn(vma, pfn, size);
- }
-
- area = find_vm_area(cpu_addr);
- if (WARN_ON(!area || !area->pages))
- return -ENXIO;
-
- return iommu_dma_mmap(area->pages, size, vma);
-}
-
-static int __iommu_get_sgtable(struct device *dev, struct sg_table *sgt,
- void *cpu_addr, dma_addr_t dma_addr,
- size_t size, unsigned long attrs)
-{
- unsigned int count = PAGE_ALIGN(size) >> PAGE_SHIFT;
- struct vm_struct *area = find_vm_area(cpu_addr);
-
- if (!is_vmalloc_addr(cpu_addr)) {
- struct page *page = virt_to_page(cpu_addr);
- return __swiotlb_get_sgtable_page(sgt, page, size);
- }
-
- if (attrs & DMA_ATTR_FORCE_CONTIGUOUS) {
- /*
- * DMA_ATTR_FORCE_CONTIGUOUS allocations are always remapped,
- * hence in the vmalloc space.
- */
- struct page *page = vmalloc_to_page(cpu_addr);
- return __swiotlb_get_sgtable_page(sgt, page, size);
- }
-
- if (WARN_ON(!area || !area->pages))
- return -ENXIO;
-
- return sg_alloc_table_from_pages(sgt, area->pages, count, 0, size,
- GFP_KERNEL);
-}
-
-static void __iommu_sync_single_for_cpu(struct device *dev,
- dma_addr_t dev_addr, size_t size,
- enum dma_data_direction dir)
-{
- phys_addr_t phys;
-
- if (dev_is_dma_coherent(dev))
- return;
-
- phys = iommu_iova_to_phys(iommu_get_dma_domain(dev), dev_addr);
- arch_sync_dma_for_cpu(dev, phys, size, dir);
-}
-
-static void __iommu_sync_single_for_device(struct device *dev,
- dma_addr_t dev_addr, size_t size,
- enum dma_data_direction dir)
-{
- phys_addr_t phys;
-
- if (dev_is_dma_coherent(dev))
- return;
-
- phys = iommu_iova_to_phys(iommu_get_dma_domain(dev), dev_addr);
- arch_sync_dma_for_device(dev, phys, size, dir);
-}
-
-static dma_addr_t __iommu_map_page(struct device *dev, struct page *page,
- unsigned long offset, size_t size,
- enum dma_data_direction dir,
- unsigned long attrs)
-{
- bool coherent = dev_is_dma_coherent(dev);
- int prot = dma_info_to_prot(dir, coherent, attrs);
- dma_addr_t dev_addr = iommu_dma_map_page(dev, page, offset, size, prot);
-
- if (!coherent && !(attrs & DMA_ATTR_SKIP_CPU_SYNC) &&
- dev_addr != DMA_MAPPING_ERROR)
- __dma_map_area(page_address(page) + offset, size, dir);
-
- return dev_addr;
-}
-
-static void __iommu_unmap_page(struct device *dev, dma_addr_t dev_addr,
- size_t size, enum dma_data_direction dir,
- unsigned long attrs)
-{
- if ((attrs & DMA_ATTR_SKIP_CPU_SYNC) == 0)
- __iommu_sync_single_for_cpu(dev, dev_addr, size, dir);
-
- iommu_dma_unmap_page(dev, dev_addr, size, dir, attrs);
-}
-
-static void __iommu_sync_sg_for_cpu(struct device *dev,
- struct scatterlist *sgl, int nelems,
- enum dma_data_direction dir)
-{
- struct scatterlist *sg;
- int i;
-
- if (dev_is_dma_coherent(dev))
- return;
-
- for_each_sg(sgl, sg, nelems, i)
- arch_sync_dma_for_cpu(dev, sg_phys(sg), sg->length, dir);
-}
-
-static void __iommu_sync_sg_for_device(struct device *dev,
- struct scatterlist *sgl, int nelems,
- enum dma_data_direction dir)
-{
- struct scatterlist *sg;
- int i;
-
- if (dev_is_dma_coherent(dev))
- return;
-
- for_each_sg(sgl, sg, nelems, i)
- arch_sync_dma_for_device(dev, sg_phys(sg), sg->length, dir);
-}
-
-static int __iommu_map_sg_attrs(struct device *dev, struct scatterlist *sgl,
- int nelems, enum dma_data_direction dir,
- unsigned long attrs)
-{
- bool coherent = dev_is_dma_coherent(dev);
-
- if ((attrs & DMA_ATTR_SKIP_CPU_SYNC) == 0)
- __iommu_sync_sg_for_device(dev, sgl, nelems, dir);
-
- return iommu_dma_map_sg(dev, sgl, nelems,
- dma_info_to_prot(dir, coherent, attrs));
-}
-
-static void __iommu_unmap_sg_attrs(struct device *dev,
- struct scatterlist *sgl, int nelems,
- enum dma_data_direction dir,
- unsigned long attrs)
-{
- if ((attrs & DMA_ATTR_SKIP_CPU_SYNC) == 0)
- __iommu_sync_sg_for_cpu(dev, sgl, nelems, dir);
-
- iommu_dma_unmap_sg(dev, sgl, nelems, dir, attrs);
-}
-
-static const struct dma_map_ops iommu_dma_ops = {
- .alloc = __iommu_alloc_attrs,
- .free = __iommu_free_attrs,
- .mmap = __iommu_mmap_attrs,
- .get_sgtable = __iommu_get_sgtable,
- .map_page = __iommu_map_page,
- .unmap_page = __iommu_unmap_page,
- .map_sg = __iommu_map_sg_attrs,
- .unmap_sg = __iommu_unmap_sg_attrs,
- .sync_single_for_cpu = __iommu_sync_single_for_cpu,
- .sync_single_for_device = __iommu_sync_single_for_device,
- .sync_sg_for_cpu = __iommu_sync_sg_for_cpu,
- .sync_sg_for_device = __iommu_sync_sg_for_device,
- .map_resource = iommu_dma_map_resource,
- .unmap_resource = iommu_dma_unmap_resource,
-};
-
-static int __init __iommu_dma_init(void)
-{
- return iommu_dma_init();
-}
-arch_initcall(__iommu_dma_init);
-
-static void __iommu_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
- const struct iommu_ops *ops)
-{
- struct iommu_domain *domain;
-
- if (!ops)
- return;
-
- /*
- * The IOMMU core code allocates the default DMA domain, which the
- * underlying IOMMU driver needs to support via the dma-iommu layer.
- */
- domain = iommu_get_domain_for_dev(dev);
-
- if (!domain)
- goto out_err;
-
- if (domain->type == IOMMU_DOMAIN_DMA) {
- if (iommu_dma_init_domain(domain, dma_base, size, dev))
- goto out_err;
-
- dev->dma_ops = &iommu_dma_ops;
- }
-
- return;
-
-out_err:
- pr_warn("Failed to set up IOMMU for device %s; retaining platform DMA ops\n",
- dev_name(dev));
-}
-
void arch_teardown_dma_ops(struct device *dev)
{
dev->dma_ops = NULL;
}
-
-#else
-
-static void __iommu_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
- const struct iommu_ops *iommu)
-{ }
-
-#endif /* CONFIG_IOMMU_DMA */
+#endif
void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
const struct iommu_ops *iommu, bool coherent)
@@ -466,7 +61,8 @@ void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
ARCH_DMA_MINALIGN, cls);
dev->dma_coherent = coherent;
- __iommu_setup_dma_ops(dev, dma_base, size, iommu);
+ if (iommu)
+ iommu_setup_dma_ops(dev, dma_base, size);
#ifdef CONFIG_XEN
if (xen_initial_domain())

drivers/iommu/amd_iommu.c

View file
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index dce1d8d..73740b9 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -619,9 +619,9 @@ retry:
pasid = ((event[0] >> 16) & 0xFFFF)
| ((event[1] << 6) & 0xF0000);
tag = event[1] & 0x03FF;
- dev_err(dev, "Event logged [INVALID_PPR_REQUEST device=%02x:%02x.%x pasid=0x%05x address=0x%llx flags=0x%04x]\n",
+ dev_err(dev, "Event logged [INVALID_PPR_REQUEST device=%02x:%02x.%x pasid=0x%05x address=0x%llx flags=0x%04x tag=0x%03x]\n",
PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid),
- pasid, address, flags);
+ pasid, address, flags, tag);
break;
default:
dev_err(dev, "Event logged [UNKNOWN event[0]=0x%08x event[1]=0x%08x event[2]=0x%08x event[3]=0x%08x\n",
@@ -1295,6 +1295,16 @@ static void domain_flush_complete(struct protection_domain *domain)
}
}
+/* Flush the not present cache if it exists */
+static void domain_flush_np_cache(struct protection_domain *domain,
+ dma_addr_t iova, size_t size)
+{
+ if (unlikely(amd_iommu_np_cache)) {
+ domain_flush_pages(domain, iova, size);
+ domain_flush_complete(domain);
+ }
+}
+
/*
* This function flushes the DTEs for all devices in domain
@@ -2377,10 +2387,7 @@ static dma_addr_t __map_single(struct device *dev,
}
address += offset;
- if (unlikely(amd_iommu_np_cache)) {
- domain_flush_pages(&dma_dom->domain, address, size);
- domain_flush_complete(&dma_dom->domain);
- }
+ domain_flush_np_cache(&dma_dom->domain, address, size);
out:
return address;
@@ -2559,6 +2566,9 @@ static int map_sg(struct device *dev, struct scatterlist *sglist,
s->dma_length = s->length;
}
+ if (s)
+ domain_flush_np_cache(domain, s->dma_address, s->dma_length);
+
return nelems;
out_unmap:
@@ -2597,7 +2607,7 @@ static void unmap_sg(struct device *dev, struct scatterlist *sglist,
struct protection_domain *domain;
struct dma_ops_domain *dma_dom;
unsigned long startaddr;
- int npages = 2;
+ int npages;
domain = get_domain(dev);
if (IS_ERR(domain))
@@ -3039,6 +3049,8 @@ static int amd_iommu_map(struct iommu_domain *dom, unsigned long iova,
ret = iommu_map_page(domain, iova, paddr, page_size, prot, GFP_KERNEL);
mutex_unlock(&domain->api_lock);
+ domain_flush_np_cache(domain, iova, page_size);
+
return ret;
}

drivers/iommu/amd_iommu_init.c

View file
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
index 07d84db..eb104c7 100644
--- a/drivers/iommu/amd_iommu_init.c
+++ b/drivers/iommu/amd_iommu_init.c
@@ -406,6 +406,9 @@ static void iommu_enable(struct amd_iommu *iommu)
static void iommu_disable(struct amd_iommu *iommu)
{
+ if (!iommu->mmio_base)
+ return;
+
/* Disable command buffer */
iommu_feature_disable(iommu, CONTROL_CMDBUF_EN);
@@ -2325,15 +2328,6 @@ static void __init free_iommu_resources(void)
amd_iommu_dev_table = NULL;
free_iommu_all();
-
-#ifdef CONFIG_GART_IOMMU
- /*
- * We failed to initialize the AMD IOMMU - try fallback to GART
- * if possible.
- */
- gart_iommu_init();
-
-#endif
}
/* SB IOAPIC is always on this device in AMD systems */
@@ -2625,8 +2619,6 @@ static int __init state_next(void)
init_state = ret ? IOMMU_INIT_ERROR : IOMMU_ACPI_FINISHED;
if (init_state == IOMMU_ACPI_FINISHED && amd_iommu_disabled) {
pr_info("AMD IOMMU disabled on kernel command-line\n");
- free_dma_resources();
- free_iommu_resources();
init_state = IOMMU_CMDLINE_DISABLED;
ret = -EINVAL;
}
@@ -2667,6 +2659,19 @@ static int __init state_next(void)
BUG();
}
+ if (ret) {
+ free_dma_resources();
+ if (!irq_remapping_enabled) {
+ disable_iommus();
+ free_iommu_resources();
+ } else {
+ struct amd_iommu *iommu;
+
+ uninit_device_table_dma();
+ for_each_iommu(iommu)
+ iommu_flush_all_caches(iommu);
+ }
+ }

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drivers/iommu/arm-smmu-v3.c

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drivers/iommu/arm-smmu.c

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drivers/iommu/dma-iommu.c

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drivers/iommu/intel-iommu-debugfs.c

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drivers/iommu/intel-iommu.c

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drivers/iommu/intel-pasid.c

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drivers/iommu/intel-pasid.h

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drivers/iommu/intel-svm.c

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drivers/iommu/intel_irq_remapping.c

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drivers/iommu/io-pgtable-arm-v7s.c

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drivers/iommu/io-pgtable-arm.c

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drivers/iommu/iommu.c

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drivers/iommu/ipmmu-vmsa.c

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drivers/iommu/omap-iommu-debug.c

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drivers/iommu/omap-iommu.c

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include/linux/device.h

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include/linux/dma-iommu.h

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include/linux/intel-iommu.h

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include/linux/intel-svm.h

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include/linux/io-pgtable.h

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include/linux/iommu.h

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include/uapi/linux/iommu.h

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