motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-04 00:03:54 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

intel-iommu: add context-cache to cache context-entry

Browse source 
Add context-cache to cache context-entry encountered on a page-walk. Each
VTDAddressSpace has a member of VTDContextCacheEntry which represents an entry
in the context-cache. Since devices with different bus_num and devfn have their
respective VTDAddressSpace, this will be a good way to reference the cached
entries.
Each VTDContextCacheEntry will have a context_cache_gen and the cached entry
is valid only when context_cache_gen equals IntelIOMMUState.context_cache_gen.

Signed-off-by: Le Tan <tamlokveer@gmail.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Le Tan 2014-08-16 13:55:43 +08:00 • committed by Michael S. Tsirkin
parent ed7b8fbcfb
commit d92fa2dc6e
4 changed files with 200 additions and 36 deletions
Download patch file Download diff file Expand all files Collapse all files

1
hw/pci-host/q35.c
View file

@ -368,6 +368,7 @@ static AddressSpace *q35_host_dma_iommu(PCIBus *bus, void *opaque, int devfn)
pvtd_as[devfn]->bus_num = (uint8_t)bus_num;
pvtd_as[devfn]->devfn = (uint8_t)devfn;
pvtd_as[devfn]->iommu_state = s;
pvtd_as[devfn]->context_cache_entry.context_cache_gen = 0;
memory_region_init_iommu(&pvtd_as[devfn]->iommu, OBJECT(s),
&s->iommu_ops, "intel_iommu", UINT64_MAX);
address_space_init(&pvtd_as[devfn]->as,