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Add domain flag DOMAIN_FLAG_VIRTUAL_MACHINE

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

Signed-off-by: Weidong Han <weidong.han@intel.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Weidong Han 2008-12-08 16:35:39 +08:00 committed by Joerg Roedel
parent 8e604097dd
commit 1ce28feb22
1 changed files with 7 additions and 0 deletions
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7
drivers/pci/intel-iommu.c
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@ -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;