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IOMMU Fixes for Linux v4.7-rc6

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Two Fixes:
 
 	* Intel VT-d fix for a suspend/resume issue, introduced with the
 	  scalability improvements in this cycle.
 
 	* AMD IOMMU fix for systems that have unity mappings defined. There was
 	  a race where translation got enabled before the unity mappings were
 	  in place. This issue was seen on some HP servers.
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Merge tag 'iommu-fixes-v4.7-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu

Pull IOMMU fixes from Joerg Roedel:
 "Two Fixes:

   - Intel VT-d fix for a suspend/resume issue, introduced with the
     scalability improvements in this cycle.

   - AMD IOMMU fix for systems that have unity mappings defined.  There
     was a race where translation got enabled before the unity mappings
     were in place.  This issue was seen on some HP servers"

* tag 'iommu-fixes-v4.7-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  iommu/amd: Fix unity mapping initialization race
  iommu/vt-d: Fix infinite loop in free_all_cpu_cached_iovas
This commit is contained in:
Linus Torvalds 2016-07-08 09:35:23 -07:00
parent cfae7e3eb1 522e5cb76d
commit b89c44bb23
2 changed files with 14 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

14
drivers/iommu/amd_iommu_init.c
View file

@ -1568,13 +1568,23 @@ static int __init amd_iommu_init_pci(void)
break;
}
/*
* Order is important here to make sure any unity map requirements are
* fulfilled. The unity mappings are created and written to the device
* table during the amd_iommu_init_api() call.
*
* After that we call init_device_table_dma() to make sure any
* uninitialized DTE will block DMA, and in the end we flush the caches
* of all IOMMUs to make sure the changes to the device table are
* active.
*/
ret = amd_iommu_init_api();
init_device_table_dma();
for_each_iommu(iommu)
iommu_flush_all_caches(iommu);
ret = amd_iommu_init_api();
if (!ret)
print_iommu_info();

4
drivers/iommu/intel-iommu.c
View file

@ -4602,13 +4602,13 @@ static void free_all_cpu_cached_iovas(unsigned int cpu)
for (i = 0; i < g_num_of_iommus; i++) {
struct intel_iommu *iommu = g_iommus[i];
struct dmar_domain *domain;
u16 did;
int did;
if (!iommu)
continue;
for (did = 0; did < cap_ndoms(iommu->cap); did++) {
domain = get_iommu_domain(iommu, did);
domain = get_iommu_domain(iommu, (u16)did);
if (!domain)
continue;