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authorAvi Kivity <avi.kivity@gmail.com>2012-10-30 13:47:46 +0200
committerPaolo Bonzini <pbonzini@redhat.com>2013-06-20 16:32:47 +0200
commit30951157441aed950ad8ca326500b4986d431c7a (patch)
treea5b3ba2434175eb5e87b533d4791038d33ac73a0 /memory.c
parent052e87b073cb70afcd767d32f45af2794a5a65de (diff)
memory: iommu support
Add a new memory region type that translates addresses it is given, then forwards them to a target address space. This is similar to an alias, except that the mapping is more flexible than a linear translation and trucation, and also less efficient since the translation happens at runtime. The implementation uses an AddressSpace mapping the target region to avoid hierarchical dispatch all the way to the resolved region; only iommu regions are looked up dynamically. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Avi Kivity <avi.kivity@gmail.com> [Modified to put translation in address_space_translate; assume IOMMUs are not reachable from TCG. - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'memory.c')
-rw-r--r--memory.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/memory.c b/memory.c
index 2b197455b4..7eb8d461b9 100644
--- a/memory.c
+++ b/memory.c
@@ -824,6 +824,7 @@ void memory_region_init(MemoryRegion *mr,
{
mr->ops = &unassigned_mem_ops;
mr->opaque = NULL;
+ mr->iommu_ops = NULL;
mr->parent = NULL;
mr->size = int128_make64(size);
if (size == UINT64_MAX) {
@@ -1063,6 +1064,16 @@ void memory_region_init_rom_device(MemoryRegion *mr,
mr->ram_addr = qemu_ram_alloc(size, mr);
}
+void memory_region_init_iommu(MemoryRegion *mr,
+ const MemoryRegionIOMMUOps *ops,
+ const char *name,
+ uint64_t size)
+{
+ memory_region_init(mr, name, size);
+ mr->iommu_ops = ops,
+ mr->terminates = true; /* then re-forwards */
+}
+
void memory_region_init_reservation(MemoryRegion *mr,
const char *name,
uint64_t size)
@@ -1108,6 +1119,11 @@ bool memory_region_is_rom(MemoryRegion *mr)
return mr->ram && mr->readonly;
}
+bool memory_region_is_iommu(MemoryRegion *mr)
+{
+ return mr->iommu_ops;
+}
+
void memory_region_set_log(MemoryRegion *mr, bool log, unsigned client)
{
uint8_t mask = 1 << client;