diff options
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/dmar.c | 7 | ||||
| -rw-r--r-- | drivers/pci/intel-iommu.c | 17 |
2 files changed, 22 insertions, 2 deletions
diff --git a/drivers/pci/dmar.c b/drivers/pci/dmar.c index 7b287cb38b7a..ab99783dccec 100644 --- a/drivers/pci/dmar.c +++ b/drivers/pci/dmar.c @@ -33,6 +33,7 @@ #include <linux/timer.h> #include <linux/irq.h> #include <linux/interrupt.h> +#include <linux/tboot.h> #undef PREFIX #define PREFIX "DMAR:" @@ -413,6 +414,12 @@ parse_dmar_table(void) */ dmar_table_detect(); + /* + * ACPI tables may not be DMA protected by tboot, so use DMAR copy + * SINIT saved in SinitMleData in TXT heap (which is DMA protected) + */ + dmar_tbl = tboot_get_dmar_table(dmar_tbl); + dmar = (struct acpi_table_dmar *)dmar_tbl; if (!dmar) return -ENODEV; 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(); |