Secure guest memory is inacessible to devices so regular DMA isn't
possible.
In that case set devices' dma_map_ops to NULL so that the generic
DMA code path will use SWIOTLB and DMA to bounce buffers.
Signed-off-by: Thiago Jung Bauermann <bauer...@linux.ibm.com>
---
arch/powerpc/platforms/pseries/iommu.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/platforms/pseries/iommu.c
b/arch/powerpc/platforms/pseries/iommu.c
index 03bbb299320e..7d9550edb700 100644
--- a/arch/powerpc/platforms/pseries/iommu.c
+++ b/arch/powerpc/platforms/pseries/iommu.c
@@ -50,6 +50,7 @@
#include <asm/udbg.h>
#include <asm/mmzone.h>
#include <asm/plpar_wrappers.h>
+#include <asm/svm.h>
#include "pseries.h"
@@ -1332,7 +1333,10 @@ void iommu_init_early_pSeries(void)
of_reconfig_notifier_register(&iommu_reconfig_nb);
register_memory_notifier(&iommu_mem_nb);
- set_pci_dma_ops(&dma_iommu_ops);
+ if (is_secure_guest())
+ set_pci_dma_ops(NULL);
+ else
+ set_pci_dma_ops(&dma_iommu_ops);
}
static int __init disable_multitce(char *str)
