diff options
Diffstat (limited to 'drivers/iommu/amd')
| -rw-r--r-- | drivers/iommu/amd/init.c | 15 | ||||
| -rw-r--r-- | drivers/iommu/amd/iommu.c | 2 |
2 files changed, 12 insertions, 5 deletions
diff --git a/drivers/iommu/amd/init.c b/drivers/iommu/amd/init.c index a418bf560a4b..46280e6e1535 100644 --- a/drivers/iommu/amd/init.c +++ b/drivers/iommu/amd/init.c @@ -153,7 +153,8 @@ int amd_iommu_guest_ir = AMD_IOMMU_GUEST_IR_VAPIC; static int amd_iommu_xt_mode = IRQ_REMAP_XAPIC_MODE; static bool amd_iommu_detected; -static bool __initdata amd_iommu_disabled; +static bool amd_iommu_disabled __initdata; +static bool amd_iommu_force_enable __initdata; static int amd_iommu_target_ivhd_type; u16 amd_iommu_last_bdf; /* largest PCI device id we have @@ -1907,8 +1908,8 @@ static void print_iommu_info(void) pci_info(pdev, "Found IOMMU cap 0x%x\n", iommu->cap_ptr); if (iommu->cap & (1 << IOMMU_CAP_EFR)) { - pci_info(pdev, "Extended features (%#llx):", - iommu->features); + pr_info("Extended features (%#llx):", iommu->features); + for (i = 0; i < ARRAY_SIZE(feat_str); ++i) { if (iommu_feature(iommu, (1ULL << i))) pr_cont(" %s", feat_str[i]); @@ -2816,7 +2817,7 @@ out: return ret; } -static bool detect_ivrs(void) +static bool __init detect_ivrs(void) { struct acpi_table_header *ivrs_base; acpi_status status; @@ -2833,6 +2834,9 @@ static bool detect_ivrs(void) acpi_put_table(ivrs_base); + if (amd_iommu_force_enable) + goto out; + /* Don't use IOMMU if there is Stoney Ridge graphics */ for (i = 0; i < 32; i++) { u32 pci_id; @@ -2844,6 +2848,7 @@ static bool detect_ivrs(void) } } +out: /* Make sure ACS will be enabled during PCI probe */ pci_request_acs(); @@ -3095,6 +3100,8 @@ static int __init parse_amd_iommu_options(char *str) for (; *str; ++str) { if (strncmp(str, "fullflush", 9) == 0) amd_iommu_unmap_flush = true; + if (strncmp(str, "force_enable", 12) == 0) + amd_iommu_force_enable = true; if (strncmp(str, "off", 3) == 0) amd_iommu_disabled = true; if (strncmp(str, "force_isolation", 15) == 0) diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c index b1fbf2c83df5..811a49a95d04 100644 --- a/drivers/iommu/amd/iommu.c +++ b/drivers/iommu/amd/iommu.c @@ -1712,7 +1712,7 @@ static void amd_iommu_probe_finalize(struct device *dev) /* Domains are initialized for this device - have a look what we ended up with */ domain = iommu_get_domain_for_dev(dev); if (domain->type == IOMMU_DOMAIN_DMA) - iommu_setup_dma_ops(dev, IOVA_START_PFN << PAGE_SHIFT, 0); + iommu_setup_dma_ops(dev, 0, U64_MAX); else set_dma_ops(dev, NULL); } |