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| author |   Joerg Roedel <joerg.roedel@amd.com> | 2012-01-09 13:06:28 +0100 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2012-01-09 13:06:28 +0100 |
| commit | f93ea733878733f3e98475bc3e2ccf789bebcfb8 (patch) | |
| tree | ce4981e49a75d5bac7f0d2fa4ddcdcc130cf56f0 /arch/x86 | |
| parent | Merge branches 'iommu/fixes', 'arm/omap' and 'x86/amd' into next (diff) | |
| parent | iommu: Fix compile error with !IOMMU_API (diff) | |
| download | linux-dev-f93ea733878733f3e98475bc3e2ccf789bebcfb8.tar.xz linux-dev-f93ea733878733f3e98475bc3e2ccf789bebcfb8.zip | |
Merge branches 'iommu/page-sizes' and 'iommu/group-id' into next
Conflicts:
drivers/iommu/amd_iommu.c
drivers/iommu/intel-iommu.c
include/linux/iommu.h
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/include/asm/iommu.h | 1 | ||||
| -rw-r--r-- | arch/x86/kernel/pci-dma.c | 11 |
2 files changed, 12 insertions, 0 deletions
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 80dc793b3f63..1c4d769e21ea 100644 --- a/arch/x86/kernel/pci-dma.c +++ b/arch/x86/kernel/pci-dma.c @@ -45,6 +45,15 @@ 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). */ @@ -169,6 +178,8 @@ 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); |