diff options
| -rw-r--r-- | Documentation/kernel-parameters.txt | 4 | ||||
| -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 | ||||
| -rw-r--r-- | drivers/iommu/amd_iommu.c | 10 | ||||
| -rw-r--r-- | drivers/iommu/intel-iommu.c | 3 |
7 files changed, 30 insertions, 2 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index a0c5c5f4fce6..e1b6e4469845 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -1059,7 +1059,9 @@ bytes respectively. Such letter suffixes can also be entirely omitted. nomerge forcesac soft - pt [x86, IA-64] + pt [x86, IA-64] + group_mf [x86, IA-64] + io7= [HW] IO7 for Marvel based alpha systems See comment before marvel_specify_io7 in 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 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); diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index 1d82b631d09c..6f7553684c1e 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -2776,11 +2776,19 @@ static int amd_iommu_domain_has_cap(struct iommu_domain *domain, static int amd_iommu_device_group(struct device *dev, unsigned int *groupid) { struct iommu_dev_data *dev_data = dev->archdata.iommu; + struct pci_dev *pdev = to_pci_dev(dev); + u16 devid; if (!dev_data) return -ENODEV; - *groupid = amd_iommu_alias_table[dev_data->devid]; + if (pdev->is_virtfn || !iommu_group_mf) + devid = dev_data->devid; + else + devid = calc_devid(pdev->bus->number, + PCI_DEVFN(PCI_SLOT(pdev->devfn), 0)); + + *groupid = amd_iommu_alias_table[devid]; return 0; } diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 39ca6bb17e13..9ef16d664a99 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -4100,6 +4100,9 @@ static int intel_iommu_device_group(struct device *dev, unsigned int *groupid) } } + if (!pdev->is_virtfn && iommu_group_mf) + id.pci.devfn = PCI_DEVFN(PCI_SLOT(id.pci.devfn), 0); + *groupid = id.group; return 0; |