diff options
Diffstat (limited to 'arch/x86/kernel/amd_iommu_init.c')
| -rw-r--r-- | arch/x86/kernel/amd_iommu_init.c | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/arch/x86/kernel/amd_iommu_init.c b/arch/x86/kernel/amd_iommu_init.c index 8848dda..047905d 100644 --- a/arch/x86/kernel/amd_iommu_init.c +++ b/arch/x86/kernel/amd_iommu_init.c @@ -299,9 +299,23 @@ static void iommu_feature_disable(struct amd_iommu *iommu, u8 bit) /* Function to enable the hardware */ static void iommu_enable(struct amd_iommu *iommu) { - printk(KERN_INFO "AMD-Vi: Enabling IOMMU at %s cap 0x%hx\n", + static const char * const feat_str[] = { + "PreF", "PPR", "X2APIC", "NX", "GT", "[5]", + "IA", "GA", "HE", "PC", NULL + }; + int i; + + printk(KERN_INFO "AMD-Vi: Enabling IOMMU at %s cap 0x%hx", dev_name(&iommu->dev->dev), iommu->cap_ptr); + if (iommu->cap & (1 << IOMMU_CAP_EFR)) { + printk(KERN_CONT " extended features: "); + for (i = 0; feat_str[i]; ++i) + if (iommu_feature(iommu, (1ULL << i))) + printk(KERN_CONT " %s", feat_str[i]); + } + printk(KERN_CONT "\n"); + iommu_feature_enable(iommu, CONTROL_IOMMU_EN); } @@ -657,7 +671,7 @@ static void __init set_device_exclusion_range(u16 devid, struct ivmd_header *m) static void __init init_iommu_from_pci(struct amd_iommu *iommu) { int cap_ptr = iommu->cap_ptr; - u32 range, misc; + u32 range, misc, low, high; int i, j; pci_read_config_dword(iommu->dev, cap_ptr + MMIO_CAP_HDR_OFFSET, @@ -673,6 +687,12 @@ static void __init init_iommu_from_pci(struct amd_iommu *iommu) MMIO_GET_LD(range)); iommu->evt_msi_num = MMIO_MSI_NUM(misc); + /* read extended feature bits */ + low = readl(iommu->mmio_base + MMIO_EXT_FEATURES); + high = readl(iommu->mmio_base + MMIO_EXT_FEATURES + 4); + + iommu->features = ((u64)high << 32) | low; + if (!is_rd890_iommu(iommu->dev)) return; |
