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Commit 1ce28feb authored by Weidong Han's avatar Weidong Han Committed by Joerg Roedel
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Add domain flag DOMAIN_FLAG_VIRTUAL_MACHINE 



Add this flag for VT-d used in virtual machine, like KVM.

Signed-off-by: default avatarWeidong Han <weidong.han@intel.com>
Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent 8e604097

drivers/pci/intel-iommu.c

+7 −0
Original line number Diff line number Diff line
@@ -206,6 +206,11 @@ static inline bool dma_pte_present(struct dma_pte *pte) 
/* devices under the same p2p bridge are owned in one domain */

#define DOMAIN_FLAG_P2P_MULTIPLE_DEVICES (1 < 0)



/* domain represents a virtual machine, more than one devices

 * across iommus may be owned in one domain, e.g. kvm guest.

 */

#define DOMAIN_FLAG_VIRTUAL_MACHINE	(1 << 1)



struct dmar_domain {

	int	id;			/* domain id */

	unsigned long iommu_bmp;	/* bitmap of iommus this domain uses*/
@@ -391,6 +396,8 @@ static struct intel_iommu *domain_get_iommu(struct dmar_domain *domain) 
{

	int iommu_id;



	BUG_ON(domain->flags & DOMAIN_FLAG_VIRTUAL_MACHINE);



	iommu_id = find_first_bit(&domain->iommu_bmp, g_num_of_iommus);

	if (iommu_id < 0 || iommu_id >= g_num_of_iommus)

		return NULL;