perf_counter tools: Rename cache events to remove $

[linux-block.git] / arch / x86 / kernel / pci-dma.c

diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c
index 328592fb6044c6a5be8b607d56f6ff317f72bff2..47630479b0677e3cb51ee3fb473a584fdd4dfa8e 100644 (file)
--- a/arch/x86/kernel/pci-dma.c
+++ b/arch/x86/kernel/pci-dma.c
@@ -32,6 +32,8 @@ int no_iommu __read_mostly;
 /* Set this to 1 if there is a HW IOMMU in the system */
 int iommu_detected __read_mostly = 0;
 
+int iommu_pass_through;
+
 dma_addr_t bad_dma_address __read_mostly = 0;
 EXPORT_SYMBOL(bad_dma_address);
 
@@ -209,6 +211,10 @@ static __init int iommu_setup(char *p)
 #ifdef CONFIG_SWIOTLB
                if (!strncmp(p, "soft", 4))
                        swiotlb = 1;
+               if (!strncmp(p, "pt", 2)) {
+                       iommu_pass_through = 1;
+                       return 1;
+               }
 #endif
 
                gart_parse_options(p);