evie/android_kernel_oneplus_msm8998
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iommu: Add flags parameter to .trigger_fault

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IOMMU drivers might want more control over the types of faults being
triggered with iommu_trigger_fault.  Add a flags parameter that can be
used to provide more control over the types of faults that can be
triggered.

Change-Id: I2f21b383437430e957ab52070d3575e8cb3dee90
Signed-off-by: Mitchel Humpherys <mitchelh@codeaurora.org>
This commit is contained in:
Mitchel Humpherys 2015-08-19 11:33:42 -07:00 • committed by David Keitel
parent ddb8d2ab7c
commit 7f72f4984b
4 changed files with 10 additions and 7 deletions
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3
drivers/iommu/arm-smmu.c
View file

@ -1203,7 +1203,8 @@ static irqreturn_t arm_smmu_global_fault(int irq, void *dev)
return IRQ_HANDLED;
}
static void arm_smmu_trigger_fault(struct iommu_domain *domain)
static void arm_smmu_trigger_fault(struct iommu_domain *domain,
unsigned long flags)
{
struct arm_smmu_domain *smmu_domain = domain->priv;
struct arm_smmu_cfg *cfg = &smmu_domain->cfg;

2
drivers/iommu/iommu-debug.c
View file

@ -95,7 +95,7 @@ static ssize_t iommu_debug_attachment_trigger_fault_write(
{
struct iommu_debug_attachment *attach = file->private_data;
iommu_trigger_fault(attach->domain);
iommu_trigger_fault(attach->domain, 0);
return count;
}

4
drivers/iommu/iommu.c
View file

@ -896,10 +896,10 @@ EXPORT_SYMBOL_GPL(iommu_set_fault_handler);
* This function should only be used for debugging purposes, for obvious
* reasons.
*/
void iommu_trigger_fault(struct iommu_domain *domain)
void iommu_trigger_fault(struct iommu_domain *domain, unsigned long flags)
{
if (domain->ops->trigger_fault)
domain->ops->trigger_fault(domain);
domain->ops->trigger_fault(domain, flags);
}
struct iommu_domain *iommu_domain_alloc(struct bus_type *bus)

8
include/linux/iommu.h
View file

@ -158,7 +158,7 @@ struct iommu_ops {
u32 (*domain_get_windows)(struct iommu_domain *domain);
int (*dma_supported)(struct iommu_domain *domain, struct device *dev,
u64 mask);
void (*trigger_fault)(struct iommu_domain *domain);
void (*trigger_fault)(struct iommu_domain *domain, unsigned long flags);
unsigned long pgsize_bitmap;
};
@ -194,7 +194,8 @@ extern phys_addr_t iommu_iova_to_phys_hard(struct iommu_domain *domain,
dma_addr_t iova);
extern void iommu_set_fault_handler(struct iommu_domain *domain,
iommu_fault_handler_t handler, void *token);
extern void iommu_trigger_fault(struct iommu_domain *domain);
extern void iommu_trigger_fault(struct iommu_domain *domain,
unsigned long flags);
extern int iommu_attach_group(struct iommu_domain *domain,
struct iommu_group *group);
@ -384,7 +385,8 @@ static inline void iommu_set_fault_handler(struct iommu_domain *domain,
{
}
static inline void iommu_trigger_fault(struct iommu_domain *domain)
static inline void iommu_trigger_fault(struct iommu_domain *domain,
unsigned long flags)
{
}