Doug / smarc-fsl-linux-kernel

Download as
Browse Code ยป

Commit 323f99cbc35c52a65dea9d072b3ecf1e662240d2

Authored by Tom Lyon
Committed by Joerg Roedel
1 parent 1c5474a65b
Exists in master and in 7 other branches imx_3.0.35_4.1.0, imx_3.10.17_1.0.1_ga, imx_3.10.53_1.1.0_ga, imx_3.14.28_1.0.0_ga, smarc-imx_3.10.53_1.1.0_ga, smarc-imx_3.14.28_1.0.0_ga, smarc-l5.0.0_1.0.0-ga

iommu-api: Extension to check for interrupt remapping 

This patch allows IOMMU users to determine whether the
hardware and software support safe, isolated interrupt
remapping.  Not all Intel IOMMUs have the hardware, and the
software for AMD is not there yet.

Signed-off-by: Tom Lyon <pugs@cisco.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

Showing 2 changed files with 3 additions and 0 deletions Side-by-side Diff

drivers/pci/intel-iommu.c
Diff comments   View file @ 323f99c
... ... @@ -3698,6 +3698,8 @@
3698 3698  
3699 3699 if (cap == IOMMU_CAP_CACHE_COHERENCY)
3700 3700 return dmar_domain->iommu_snooping;
  3701 + if (cap == IOMMU_CAP_INTR_REMAP)
  3702 + return intr_remapping_enabled;
3701 3703  
3702 3704 return 0;
3703 3705 }
include/linux/iommu.h
Diff comments   View file @ 323f99c
... ... @@ -30,6 +30,7 @@
30 30 };
31 31  
32 32 #define IOMMU_CAP_CACHE_COHERENCY 0x1
  33 +#define IOMMU_CAP_INTR_REMAP 0x2 /* isolates device intrs */
33 34  
34 35 struct iommu_ops {
35 36 int (*domain_init)(struct iommu_domain *domain);