diff options
Diffstat (limited to 'drivers/pci/intel-iommu.c')
| -rw-r--r-- | drivers/pci/intel-iommu.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c index 2314ad7ee5fe..562221e11917 100644 --- a/drivers/pci/intel-iommu.c +++ b/drivers/pci/intel-iommu.c @@ -37,6 +37,7 @@ #include <linux/iommu.h> #include <linux/intel-iommu.h> #include <linux/sysdev.h> +#include <linux/tboot.h> #include <asm/cacheflush.h> #include <asm/iommu.h> #include "pci.h" @@ -3183,12 +3184,22 @@ static int __init init_iommu_sysfs(void) int __init intel_iommu_init(void) { int ret = 0; + int force_on = 0; - if (dmar_table_init()) + /* VT-d is required for a TXT/tboot launch, so enforce that */ + force_on = tboot_force_iommu(); + + if (dmar_table_init()) { + if (force_on) + panic("tboot: Failed to initialize DMAR table\n"); return -ENODEV; + } - if (dmar_dev_scope_init()) + if (dmar_dev_scope_init()) { + if (force_on) + panic("tboot: Failed to initialize DMAR device scope\n"); return -ENODEV; + } /* * Check the need for DMA-remapping initialization now. @@ -3204,6 +3215,8 @@ int __init intel_iommu_init(void) ret = init_dmars(); if (ret) { + if (force_on) + panic("tboot: Failed to initialize DMARs\n"); printk(KERN_ERR "IOMMU: dmar init failed\n"); put_iova_domain(&reserved_iova_list); iommu_exit_mempool(); |