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Commit 323f99cb authored by Tom Lyon's avatar Tom Lyon Committed by Joerg Roedel
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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: default avatarTom Lyon <pugs@cisco.com>
Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent 1c5474a6

drivers/pci/intel-iommu.c

+2 −0
Original line number Diff line number Diff line
@@ -3698,6 +3698,8 @@ static int intel_iommu_domain_has_cap(struct iommu_domain *domain, 


	if (cap == IOMMU_CAP_CACHE_COHERENCY)

		return dmar_domain->iommu_snooping;

	if (cap == IOMMU_CAP_INTR_REMAP)

		return intr_remapping_enabled;



	return 0;

}

include/linux/iommu.h

+1 −0
Original line number Diff line number Diff line
@@ -30,6 +30,7 @@ struct iommu_domain { 
};



#define IOMMU_CAP_CACHE_COHERENCY	0x1

#define IOMMU_CAP_INTR_REMAP		0x2	/* isolates device intrs */



struct iommu_ops {

	int (*domain_init)(struct iommu_domain *domain);