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IOMMU Fixes for Linux v4.0-rc3

Browse source 
The patches contain:
 
 	* Fix multiple ARM IOMMU drivers to behave well when the
 	  hardware is not present
 
 	* Mark MSM driver as broken
 
 	* Fix build errors with the new ARM generic io-page-table code
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Merge tag 'iommu-fixes-v4.0-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu

Pull iommu fixes from Joerg Roedel:
 "The patches contain:

   - fix multiple ARM IOMMU drivers to behave well when the hardware is
     not present

   - mark MSM driver as broken

   - fix build errors with the new ARM generic io-page-table code"

* tag 'iommu-fixes-v4.0-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  iommu/io-pgtable-arm: Add built time dependency
  iommu/msm: Mark driver BROKEN
  iommu/rockchip: Play nice in multi-platform builds
  iommu/omap: Play nice in multi-platform builds
  iommu/exynos: Play nice in multi-platform builds
  iommu/io-pgtable-arm: Fix self-test WARNs on i386
This commit is contained in:
Linus Torvalds 2015-03-10 17:36:19 -07:00
commit 9c3e1323ec
5 changed files with 26 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
drivers/iommu/Kconfig
View file

@ -23,6 +23,7 @@ config IOMMU_IO_PGTABLE
config IOMMU_IO_PGTABLE_LPAE
bool "ARMv7/v8 Long Descriptor Format"
select IOMMU_IO_PGTABLE
depends on ARM || ARM64 || COMPILE_TEST
help
Enable support for the ARM long descriptor pagetable format.
This allocator supports 4K/2M/1G, 16K/32M and 64K/512M page
@ -63,6 +64,7 @@ config MSM_IOMMU
bool "MSM IOMMU Support"
depends on ARM
depends on ARCH_MSM8X60 || ARCH_MSM8960 || COMPILE_TEST
depends on BROKEN
select IOMMU_API
help
Support for the IOMMUs found on certain Qualcomm SOCs.

7
drivers/iommu/exynos-iommu.c
View file

@ -1186,8 +1186,15 @@ static const struct iommu_ops exynos_iommu_ops = {
static int __init exynos_iommu_init(void)
{
struct device_node *np;
int ret;
np = of_find_matching_node(NULL, sysmmu_of_match);
if (!np)
return 0;
of_node_put(np);
lv2table_kmem_cache = kmem_cache_create("exynos-iommu-lv2table",
LV2TABLE_SIZE, LV2TABLE_SIZE, 0, NULL);
if (!lv2table_kmem_cache) {

5
drivers/iommu/io-pgtable-arm.c
View file

@ -56,7 +56,8 @@
((((d)->levels - ((l) - ARM_LPAE_START_LVL(d) + 1)) \
* (d)->bits_per_level) + (d)->pg_shift)
#define ARM_LPAE_PAGES_PER_PGD(d) ((d)->pgd_size >> (d)->pg_shift)
#define ARM_LPAE_PAGES_PER_PGD(d) \
DIV_ROUND_UP((d)->pgd_size, 1UL << (d)->pg_shift)
/*
* Calculate the index at level l used to map virtual address a using the
@ -66,7 +67,7 @@
((l) == ARM_LPAE_START_LVL(d) ? ilog2(ARM_LPAE_PAGES_PER_PGD(d)) : 0)
#define ARM_LPAE_LVL_IDX(a,l,d) \
(((a) >> ARM_LPAE_LVL_SHIFT(l,d)) & \
(((u64)(a) >> ARM_LPAE_LVL_SHIFT(l,d)) & \
((1 << ((d)->bits_per_level + ARM_LPAE_PGD_IDX(l,d))) - 1))
/* Calculate the block/page mapping size at level l for pagetable in d. */

7
drivers/iommu/omap-iommu.c
View file

@ -1376,6 +1376,13 @@ static int __init omap_iommu_init(void)
struct kmem_cache *p;
const unsigned long flags = SLAB_HWCACHE_ALIGN;
size_t align = 1 << 10; /* L2 pagetable alignement */
struct device_node *np;
np = of_find_matching_node(NULL, omap_iommu_of_match);
if (!np)
return 0;
of_node_put(np);
p = kmem_cache_create("iopte_cache", IOPTE_TABLE_SIZE, align, flags,
iopte_cachep_ctor);

7
drivers/iommu/rockchip-iommu.c
View file

@ -1015,8 +1015,15 @@ static struct platform_driver rk_iommu_driver = {
static int __init rk_iommu_init(void)
{
struct device_node *np;
int ret;
np = of_find_matching_node(NULL, rk_iommu_dt_ids);
if (!np)
return 0;
of_node_put(np);
ret = bus_set_iommu(&platform_bus_type, &rk_iommu_ops);
if (ret)
return ret;