evie/android_kernel_oneplus_msm8998
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Merge branch 'for-joerg/arm-smmu/updates' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into arm/smmu

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This commit is contained in:
Joerg Roedel 2013-12-30 14:15:27 +01:00
commit e2c22d9599
2 changed files with 30 additions and 10 deletions
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33
drivers/iommu/arm-smmu.c
View file

@ -24,7 +24,7 @@
* - v7/v8 long-descriptor format
* - Non-secure access to the SMMU
* - 4k and 64k pages, with contiguous pte hints.
* - Up to 39-bit addressing
* - Up to 42-bit addressing (dependent on VA_BITS)
* - Context fault reporting
*/
@ -61,12 +61,13 @@
#define ARM_SMMU_GR1(smmu) ((smmu)->base + (smmu)->pagesize)
/* Page table bits */
#define ARM_SMMU_PTE_PAGE (((pteval_t)3) << 0)
#define ARM_SMMU_PTE_XN (((pteval_t)3) << 53)
#define ARM_SMMU_PTE_CONT (((pteval_t)1) << 52)
#define ARM_SMMU_PTE_AF (((pteval_t)1) << 10)
#define ARM_SMMU_PTE_SH_NS (((pteval_t)0) << 8)
#define ARM_SMMU_PTE_SH_OS (((pteval_t)2) << 8)
#define ARM_SMMU_PTE_SH_IS (((pteval_t)3) << 8)
#define ARM_SMMU_PTE_PAGE (((pteval_t)3) << 0)
#if PAGE_SIZE == SZ_4K
#define ARM_SMMU_PTE_CONT_ENTRIES 16
@ -1205,7 +1206,7 @@ static int arm_smmu_alloc_init_pte(struct arm_smmu_device *smmu, pmd_t *pmd,
unsigned long pfn, int flags, int stage)
{
pte_t *pte, *start;
pteval_t pteval = ARM_SMMU_PTE_PAGE | ARM_SMMU_PTE_AF;
pteval_t pteval = ARM_SMMU_PTE_PAGE | ARM_SMMU_PTE_AF | ARM_SMMU_PTE_XN;
if (pmd_none(*pmd)) {
/* Allocate a new set of tables */
@ -1244,7 +1245,9 @@ static int arm_smmu_alloc_init_pte(struct arm_smmu_device *smmu, pmd_t *pmd,
}
/* If no access, create a faulting entry to avoid TLB fills */
if (!(flags & (IOMMU_READ | IOMMU_WRITE)))
if (flags & IOMMU_EXEC)
pteval &= ~ARM_SMMU_PTE_XN;
else if (!(flags & (IOMMU_READ | IOMMU_WRITE)))
pteval &= ~ARM_SMMU_PTE_PAGE;
pteval |= ARM_SMMU_PTE_SH_IS;
@ -1494,6 +1497,13 @@ static int arm_smmu_add_device(struct device *dev)
{
struct arm_smmu_device *child, *parent, *smmu;
struct arm_smmu_master *master = NULL;
struct iommu_group *group;
int ret;
if (dev->archdata.iommu) {
dev_warn(dev, "IOMMU driver already assigned to device\n");
return -EINVAL;
}
spin_lock(&arm_smmu_devices_lock);
list_for_each_entry(parent, &arm_smmu_devices, list) {
@ -1526,13 +1536,23 @@ static int arm_smmu_add_device(struct device *dev)
if (!master)
return -ENODEV;
group = iommu_group_alloc();
if (IS_ERR(group)) {
dev_err(dev, "Failed to allocate IOMMU group\n");
return PTR_ERR(group);
}
ret = iommu_group_add_device(group, dev);
iommu_group_put(group);
dev->archdata.iommu = smmu;
return 0;
return ret;
}
static void arm_smmu_remove_device(struct device *dev)
{
dev->archdata.iommu = NULL;
iommu_group_remove_device(dev);
}
static struct iommu_ops arm_smmu_ops = {
@ -1730,7 +1750,6 @@ static int arm_smmu_device_cfg_probe(struct arm_smmu_device *smmu)
* allocation (PTRS_PER_PGD).
*/
#ifdef CONFIG_64BIT
/* Current maximum output size of 39 bits */
smmu->s1_output_size = min(39UL, size);
#else
smmu->s1_output_size = min(32UL, size);
@ -1745,7 +1764,7 @@ static int arm_smmu_device_cfg_probe(struct arm_smmu_device *smmu)
} else {
#ifdef CONFIG_64BIT
size = (id >> ID2_UBS_SHIFT) & ID2_UBS_MASK;
size = min(39, arm_smmu_id_size_to_bits(size));
size = min(VA_BITS, arm_smmu_id_size_to_bits(size));
#else
size = 32;
#endif

7
include/linux/iommu.h
View file

@ -24,9 +24,10 @@
#include <linux/types.h>
#include <trace/events/iommu.h>
#define IOMMU_READ (1)
#define IOMMU_WRITE (2)
#define IOMMU_CACHE (4) /* DMA cache coherency */
#define IOMMU_READ (1 << 0)
#define IOMMU_WRITE (1 << 1)
#define IOMMU_CACHE (1 << 2) /* DMA cache coherency */
#define IOMMU_EXEC (1 << 3)
struct iommu_ops;
struct iommu_group;