diff options
Diffstat (limited to 'drivers/pci/intel-iommu.c')
| -rw-r--r-- | drivers/pci/intel-iommu.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c index 358dd406fe21..4905e0e3a644 100644 --- a/drivers/pci/intel-iommu.c +++ b/drivers/pci/intel-iommu.c @@ -1602,6 +1602,36 @@ static inline int iommu_prepare_rmrr_dev(struct dmar_rmrr_unit *rmrr, rmrr->end_address + 1); } +#ifdef CONFIG_DMAR_GFX_WA +extern int arch_get_ram_range(int slot, u64 *addr, u64 *size); +static void __init iommu_prepare_gfx_mapping(void) +{ + struct pci_dev *pdev = NULL; + u64 base, size; + int slot; + int ret; + + for_each_pci_dev(pdev) { + if (pdev->sysdata == DUMMY_DEVICE_DOMAIN_INFO || + !IS_GFX_DEVICE(pdev)) + continue; + printk(KERN_INFO "IOMMU: gfx device %s 1-1 mapping\n", + pci_name(pdev)); + slot = arch_get_ram_range(0, &base, &size); + while (slot >= 0) { + ret = iommu_prepare_identity_map(pdev, + base, base + size); + if (ret) + goto error; + slot = arch_get_ram_range(slot, &base, &size); + } + continue; +error: + printk(KERN_ERR "IOMMU: mapping reserved region failed\n"); + } +} +#endif + int __init init_dmars(void) { struct dmar_drhd_unit *drhd; @@ -1665,6 +1695,8 @@ int __init init_dmars(void) } } + iommu_prepare_gfx_mapping(); + /* * for each drhd * enable fault log @@ -2176,3 +2208,4 @@ int __init intel_iommu_init(void) dma_ops = &intel_dma_ops; return 0; } + |