xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

iommu: Add helpers to set/get default domain type

Browse Source 
Add a couple of functions to allow changing the default
domain type from architecture code and a function for iommu
drivers to request whether the default domain is
passthrough.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Joerg Roedel
2019-08-19 15:22:47 +02:00
parent faf1498993
commit 8a69961c7f
2 changed files with 38 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
include/linux/iommu.h
View File

@@ -436,6 +436,9 @@ extern void iommu_get_resv_regions(struct device *dev, struct list_head *list);
extern void iommu_put_resv_regions(struct device *dev, struct list_head *list);
extern int iommu_request_dm_for_dev(struct device *dev);
extern int iommu_request_dma_domain_for_dev(struct device *dev);
extern void iommu_set_default_passthrough(bool cmd_line);
extern void iommu_set_default_translated(bool cmd_line);
extern bool iommu_default_passthrough(void);
extern struct iommu_resv_region *
iommu_alloc_resv_region(phys_addr_t start, size_t length, int prot,
enum iommu_resv_type type);
@@ -736,6 +739,19 @@ static inline int iommu_request_dma_domain_for_dev(struct device *dev)
return -ENODEV;
}
static inline void iommu_set_default_passthrough(bool cmd_line)
{
}
static inline void iommu_set_default_translated(bool cmd_line)
{
}
static inline bool iommu_default_passthrough(void)
{
return true;
}
static inline int iommu_attach_group(struct iommu_domain *domain,
struct iommu_group *group)
{