diff options
| -rw-r--r-- | arch/x86/kernel/amd_iommu.c | 7 | ||||
| -rw-r--r-- | drivers/base/iommu.c | 7 | ||||
| -rw-r--r-- | drivers/pci/intel-iommu.c | 12 | ||||
| -rw-r--r-- | include/linux/iommu.h | 12 |
4 files changed, 38 insertions, 0 deletions
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c index 5113c080f0c..65c9b58655f 100644 --- a/arch/x86/kernel/amd_iommu.c +++ b/arch/x86/kernel/amd_iommu.c @@ -1924,6 +1924,12 @@ static phys_addr_t amd_iommu_iova_to_phys(struct iommu_domain *dom, return paddr; } +static int amd_iommu_domain_has_cap(struct iommu_domain *domain, + unsigned long cap) +{ + return 0; +} + static struct iommu_ops amd_iommu_ops = { .domain_init = amd_iommu_domain_init, .domain_destroy = amd_iommu_domain_destroy, @@ -1932,5 +1938,6 @@ static struct iommu_ops amd_iommu_ops = { .map = amd_iommu_map_range, .unmap = amd_iommu_unmap_range, .iova_to_phys = amd_iommu_iova_to_phys, + .domain_has_cap = amd_iommu_domain_has_cap, }; diff --git a/drivers/base/iommu.c b/drivers/base/iommu.c index 5e039d4f877..c314f144825 100644 --- a/drivers/base/iommu.c +++ b/drivers/base/iommu.c @@ -98,3 +98,10 @@ phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, return iommu_ops->iova_to_phys(domain, iova); } EXPORT_SYMBOL_GPL(iommu_iova_to_phys); + +int iommu_domain_has_cap(struct iommu_domain *domain, + unsigned long cap) +{ + return iommu_ops->domain_has_cap(domain, cap); +} +EXPORT_SYMBOL_GPL(iommu_domain_has_cap); diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c index be999ff025a..3778ab149ba 100644 --- a/drivers/pci/intel-iommu.c +++ b/drivers/pci/intel-iommu.c @@ -3158,6 +3158,17 @@ static phys_addr_t intel_iommu_iova_to_phys(struct iommu_domain *domain, return phys; } +static int intel_iommu_domain_has_cap(struct iommu_domain *domain, + unsigned long cap) +{ + struct dmar_domain *dmar_domain = domain->priv; + + if (cap == IOMMU_CAP_CACHE_COHERENCY) + return dmar_domain->iommu_snooping; + + return 0; +} + static struct iommu_ops intel_iommu_ops = { .domain_init = intel_iommu_domain_init, .domain_destroy = intel_iommu_domain_destroy, @@ -3166,6 +3177,7 @@ static struct iommu_ops intel_iommu_ops = { .map = intel_iommu_map_range, .unmap = intel_iommu_unmap_range, .iova_to_phys = intel_iommu_iova_to_phys, + .domain_has_cap = intel_iommu_domain_has_cap, }; static void __devinit quirk_iommu_rwbf(struct pci_dev *dev) diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 8a7bfb1b6ca..0cf3a4e43f2 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -28,6 +28,8 @@ struct iommu_domain { void *priv; }; +#define IOMMU_CAP_CACHE_COHERENCY 0x1 + struct iommu_ops { int (*domain_init)(struct iommu_domain *domain); void (*domain_destroy)(struct iommu_domain *domain); @@ -39,6 +41,8 @@ struct iommu_ops { size_t size); phys_addr_t (*iova_to_phys)(struct iommu_domain *domain, unsigned long iova); + int (*domain_has_cap)(struct iommu_domain *domain, + unsigned long cap); }; #ifdef CONFIG_IOMMU_API @@ -57,6 +61,8 @@ extern void iommu_unmap_range(struct iommu_domain *domain, unsigned long iova, size_t size); extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, unsigned long iova); +extern int iommu_domain_has_cap(struct iommu_domain *domain, + unsigned long cap); #else /* CONFIG_IOMMU_API */ @@ -107,6 +113,12 @@ static inline phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, return 0; } +static inline int domain_has_cap(struct iommu_domain *domain, + unsigned long cap) +{ + return 0; +} + #endif /* CONFIG_IOMMU_API */ #endif /* __LINUX_IOMMU_H */ |