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| author | Le Tan <tamlokveer@gmail.com> | 2014-08-16 13:55:43 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2014-08-28 23:10:22 +0200 |
| commit | d92fa2dc6e42e8bd8470e69d85141176f98feaea (patch) | |
| tree | 87c67411431636b6dd9cc73604940f5f1b83ae82 /hw/pci-host/q35.c | |
| parent | ed7b8fbcfb888716c850c8f908f5b5329de46d7c (diff) | |
| download | focaccia-qemu-d92fa2dc6e42e8bd8470e69d85141176f98feaea.tar.gz focaccia-qemu-d92fa2dc6e42e8bd8470e69d85141176f98feaea.zip | |
intel-iommu: add context-cache to cache context-entry
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>
Diffstat (limited to 'hw/pci-host/q35.c')
| -rw-r--r-- | hw/pci-host/q35.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/hw/pci-host/q35.c b/hw/pci-host/q35.c index 057cab62d2..b20bad8373 100644 --- a/hw/pci-host/q35.c +++ b/hw/pci-host/q35.c @@ -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, |