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Diffstat (limited to 'drivers/pci')
-rw-r--r--drivers/pci/dmar.c7
-rw-r--r--drivers/pci/intel-iommu.c17
2 files changed, 22 insertions, 2 deletions
diff --git a/drivers/pci/dmar.c b/drivers/pci/dmar.c
index 7b287cb38b7..ab99783dcce 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 2314ad7ee5f..562221e1191 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();