Kernel/linux
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2025-01-15 09:34:17 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

IOMMU Fixes for Linux v4.7-rc6

Browse Source 
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.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2
 
 iQIcBAABAgAGBQJXf7bkAAoJECvwRC2XARrjzYoP/AvvkL955TW0pSdMWZqQ0o9j
 kL3jSl75Te1EwaSyJxR9nOK8azSsfYcG4NdzMxnFUCK6ydDA6Ogz0cMtcd6s2skd
 unQuCSpjOJiMQU426ssQrsW+KoTxi5utpapMY3Ayh94/BbEDuVtv/iUIBE1Ca9eE
 H/SQUl4l8c3Cwe//1Kwrzm6O0pslrLBoOABTpFhl4GZ5pWCcv7bwbSEjVfSY5X8x
 //trqhgsACdh+Qlp5dA56BeMVyEblOvnY5XO2ODeWOG2vlEbqH9MiUeuDBNoXxtM
 MqhLTSKijZ1wp2a1iaCuyBLKFlaW7zChU41YyQmYJ8B60u6CwVuFwGs+XltnkOha
 iYBK56xZ8npFKOs4iauBmsVZZnNrAY0mxCYg28KtNh2uUT4sQdqUCnT/SxA9Z0RC
 bRtudpoX5I3NZrlDlt6OzWqCjxFj8Zq57RwrhDuQm+ijqAAor4C7NhH7cT0QTC4k
 l1srxnLtSM/iiqWgs2hNIC2GzNbdhix8YU98kIxpT2iNB99qlqPXK9ve0bJIb03N
 oECjKBu+d0I7ApdfOlL6N/RHgZJ01O+6gK1neArtVnviBgN7tmTxgWvcioJd+JuL
 bmjytsExfP/Z2p7iy9yQCiIDicAo0+wpMOzZRG8jAXvHHCj8laZ8PhL74voWc2wH
 Mn+iaXAXUysLblaXzpEx
 =axsu
 -----END PGP SIGNATURE-----

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
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; 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(); init_device_table_dma();
for_each_iommu(iommu) for_each_iommu(iommu)
iommu_flush_all_caches(iommu); iommu_flush_all_caches(iommu);
ret = amd_iommu_init_api();
if (!ret) if (!ret)
print_iommu_info(); 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++) { for (i = 0; i < g_num_of_iommus; i++) {
struct intel_iommu *iommu = g_iommus[i]; struct intel_iommu *iommu = g_iommus[i];
struct dmar_domain *domain; struct dmar_domain *domain;
u16 did; int did;
if (!iommu) if (!iommu)
continue; continue;
for (did = 0; did < cap_ndoms(iommu->cap); did++) { for (did = 0; did < cap_ndoms(iommu->cap); did++) {
domain = get_iommu_domain(iommu, did); domain = get_iommu_domain(iommu, (u16)did);
if (!domain) if (!domain)
continue; continue;