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IOMMU Fixes for Linux v4.12-rc1

Browse source 
Including:
 
 	* Another compile-fix as a fallout of the recent header-file
 	  cleanup
 
 	* Add a missing IO/TLB flush to the Intel VT-d kdump code path
 
 	* A fix for ARM64 dma code to only access initialized
 	  iova_domain members
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Merge tag 'iommu-fixes-v4.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu

Pull IOMMU fixes from Joerg Roedel:

 - another compile-fix as a fallout of the recent header-file cleanup

 - add a missing IO/TLB flush to the Intel VT-d kdump code path

 - a fix for ARM64 dma code to only access initialized iova_domain
   members

* tag 'iommu-fixes-v4.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  iommu/mediatek: Include linux/dma-mapping.h
  iommu/vt-d: Flush the IOTLB to get rid of the initial kdump mappings
  iommu/dma: Don't touch invalid iova_domain members
This commit is contained in:
Linus Torvalds 2017-05-19 17:27:28 -07:00
commit d4c6cd157a
3 changed files with 13 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

13
drivers/iommu/dma-iommu.c
View file

@ -396,13 +396,13 @@ static void iommu_dma_free_iova(struct iommu_dma_cookie *cookie,
dma_addr_t iova, size_t size)
{
struct iova_domain *iovad = &cookie->iovad;
unsigned long shift = iova_shift(iovad);
/* The MSI case is only ever cleaning up its most recent allocation */
if (cookie->type == IOMMU_DMA_MSI_COOKIE)
cookie->msi_iova -= size;
else
free_iova_fast(iovad, iova >> shift, size >> shift);
free_iova_fast(iovad, iova_pfn(iovad, iova),
size >> iova_shift(iovad));
}
static void __iommu_dma_unmap(struct iommu_domain *domain, dma_addr_t dma_addr,
@ -617,11 +617,14 @@ static dma_addr_t __iommu_dma_map(struct device *dev, phys_addr_t phys,
{
struct iommu_domain *domain = iommu_get_domain_for_dev(dev);
struct iommu_dma_cookie *cookie = domain->iova_cookie;
struct iova_domain *iovad = &cookie->iovad;
size_t iova_off = iova_offset(iovad, phys);
size_t iova_off = 0;
dma_addr_t iova;
size = iova_align(iovad, size + iova_off);
if (cookie->type == IOMMU_DMA_IOVA_COOKIE) {
iova_off = iova_offset(&cookie->iovad, phys);
size = iova_align(&cookie->iovad, size + iova_off);
}
iova = iommu_dma_alloc_iova(domain, size, dma_get_mask(dev), dev);
if (!iova)
return DMA_ERROR_CODE;

5
drivers/iommu/intel-iommu.c
View file

@ -2055,11 +2055,14 @@ static int domain_context_mapping_one(struct dmar_domain *domain,
if (context_copied(context)) {
u16 did_old = context_domain_id(context);
if (did_old >= 0 && did_old < cap_ndoms(iommu->cap))
if (did_old >= 0 && did_old < cap_ndoms(iommu->cap)) {
iommu->flush.flush_context(iommu, did_old,
(((u16)bus) << 8) | devfn,
DMA_CCMD_MASK_NOBIT,
DMA_CCMD_DEVICE_INVL);
iommu->flush.flush_iotlb(iommu, did_old, 0, 0,
DMA_TLB_DSI_FLUSH);
}
}
pgd = domain->pgd;

1
drivers/iommu/mtk_iommu_v1.c
View file

@ -18,6 +18,7 @@
#include <linux/clk.h>
#include <linux/component.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/dma-iommu.h>
#include <linux/err.h>
#include <linux/interrupt.h>