diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/ia64/include/asm/iommu.h | 2 | ||||
| -rw-r--r-- | arch/ia64/kernel/pci-dma.c | 1 | ||||
| -rw-r--r-- | arch/x86/include/asm/iommu.h | 1 | ||||
| -rw-r--r-- | arch/x86/kernel/pci-dma.c | 11 |
4 files changed, 15 insertions, 0 deletions
diff --git a/arch/ia64/include/asm/iommu.h b/arch/ia64/include/asm/iommu.h index 105c93b00b1b..b6a809fa2995 100644 --- a/arch/ia64/include/asm/iommu.h +++ b/arch/ia64/include/asm/iommu.h @@ -11,10 +11,12 @@ extern void no_iommu_init(void); extern int force_iommu, no_iommu; extern int iommu_pass_through; extern int iommu_detected; +extern int iommu_group_mf; #else #define iommu_pass_through (0) #define no_iommu (1) #define iommu_detected (0) +#define iommu_group_mf (0) #endif extern void iommu_dma_init(void); extern void machvec_init(const char *name); diff --git a/arch/ia64/kernel/pci-dma.c b/arch/ia64/kernel/pci-dma.c index c16162c70860..eb1175720050 100644 --- a/arch/ia64/kernel/pci-dma.c +++ b/arch/ia64/kernel/pci-dma.c @@ -33,6 +33,7 @@ int force_iommu __read_mostly; #endif int iommu_pass_through; +int iommu_group_mf; /* Dummy device used for NULL arguments (normally ISA). Better would be probably a smaller DMA mask, but this is bug-to-bug compatible diff --git a/arch/x86/include/asm/iommu.h b/arch/x86/include/asm/iommu.h index 345c99cef152..dffc38ee6255 100644 --- a/arch/x86/include/asm/iommu.h +++ b/arch/x86/include/asm/iommu.h @@ -5,6 +5,7 @@ extern struct dma_map_ops nommu_dma_ops; extern int force_iommu, no_iommu; extern int iommu_detected; extern int iommu_pass_through; +extern int iommu_group_mf; /* 10 seconds */ #define DMAR_OPERATION_TIMEOUT ((cycles_t) tsc_khz*10*1000) diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c index b49d00da2aed..3b730fb13855 100644 --- a/arch/x86/kernel/pci-dma.c +++ b/arch/x86/kernel/pci-dma.c @@ -44,6 +44,15 @@ int iommu_detected __read_mostly = 0; */ int iommu_pass_through __read_mostly; +/* + * Group multi-function PCI devices into a single device-group for the + * iommu_device_group interface. This tells the iommu driver to pretend + * it cannot distinguish between functions of a device, exposing only one + * group for the device. Useful for disallowing use of individual PCI + * functions from userspace drivers. + */ +int iommu_group_mf __read_mostly; + extern struct iommu_table_entry __iommu_table[], __iommu_table_end[]; /* Dummy device used for NULL arguments (normally ISA). */ @@ -168,6 +177,8 @@ static __init int iommu_setup(char *p) #endif if (!strncmp(p, "pt", 2)) iommu_pass_through = 1; + if (!strncmp(p, "group_mf", 8)) + iommu_group_mf = 1; gart_parse_options(p); |