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| author | Ben-Ami Yassour <benami@il.ibm.com> | 2008-09-14 03:48:28 +0300 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2008-10-15 14:25:04 +0200 |
| commit | 62c476c7c7f25a5b245b9902a935636e6316e58c (patch) | |
| tree | 6584591c7c345fcbb3c6d437203dc7f4a628573a /virt/kvm/kvm_main.c | |
| parent | 387179464257921eb9aa3d15cc3ff194f6945a7c (diff) | |
| download | lwn-62c476c7c7f25a5b245b9902a935636e6316e58c.tar.gz lwn-62c476c7c7f25a5b245b9902a935636e6316e58c.zip | |
KVM: Device Assignment with VT-d
Based on a patch by: Kay, Allen M <allen.m.kay@intel.com>
This patch enables PCI device assignment based on VT-d support.
When a device is assigned to the guest, the guest memory is pinned and
the mapping is updated in the VT-d IOMMU.
[Amit: Expose KVM_CAP_IOMMU so we can check if an IOMMU is present
and also control enable/disable from userspace]
Signed-off-by: Kay, Allen M <allen.m.kay@intel.com>
Signed-off-by: Weidong Han <weidong.han@intel.com>
Signed-off-by: Ben-Ami Yassour <benami@il.ibm.com>
Signed-off-by: Amit Shah <amit.shah@qumranet.com>
Acked-by: Mark Gross <mgross@linux.intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'virt/kvm/kvm_main.c')
| -rw-r--r-- | virt/kvm/kvm_main.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 63e661be040a..f42d5c2a396d 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -41,6 +41,7 @@ #include <linux/pagemap.h> #include <linux/mman.h> #include <linux/swap.h> +#include <linux/intel-iommu.h> #include <asm/processor.h> #include <asm/io.h> @@ -76,7 +77,7 @@ static inline int valid_vcpu(int n) return likely(n >= 0 && n < KVM_MAX_VCPUS); } -static inline int is_mmio_pfn(pfn_t pfn) +inline int is_mmio_pfn(pfn_t pfn) { if (pfn_valid(pfn)) return PageReserved(pfn_to_page(pfn)); @@ -578,6 +579,12 @@ int __kvm_set_memory_region(struct kvm *kvm, } kvm_free_physmem_slot(&old, &new); + + /* map the pages in iommu page table */ + r = kvm_iommu_map_pages(kvm, base_gfn, npages); + if (r) + goto out; + return 0; out_free: |