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authorPaolo Bonzini <pbonzini@redhat.com>2018-03-18 18:26:36 +0100
committerPaolo Bonzini <pbonzini@redhat.com>2018-05-09 00:13:38 +0200
commit48564041a73adbbff52834f9edbe3806fceefab7 (patch)
tree6ea31760c88eaa9d3da36effab22e7d8343ebee2 /util
parenta411c84b561baa94b28165c52f21c33517ee8f59 (diff)
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exec: reintroduce MemoryRegion caching
MemoryRegionCache was reverted to "normal" address_space_* operations for 2.9, due to lack of support for IOMMUs. Reinstate the optimizations, caching only the IOMMU translation at address_cache_init but not the IOMMU lookup and target AddressSpace translation are not cached; now that MemoryRegionCache supports IOMMUs, it becomes more widely applicable too. The inlined fast path is defined in memory_ldst_cached.inc.h, while the slow path uses memory_ldst.inc.c as before. The smaller fast path causes a little code size reduction in MemoryRegionCache users: hw/virtio/virtio.o text size before: 32373 hw/virtio/virtio.o text size after: 31941 Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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