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authorPaolo Bonzini <pbonzini@redhat.com>2013-04-11 15:40:59 +0200
committerPaolo Bonzini <pbonzini@redhat.com>2013-05-29 16:27:16 +0200
commit51644ab70ba125cb9545702d64890743d75b444b (patch)
tree420c1b45d6556c81b04d532ca4a05202c069e341 /dma-helpers.c
parentc353e4cc08a2fce7c505dd0d04512ef3947adff8 (diff)
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memory: add address_space_access_valid
The old-style IOMMU lets you check whether an access is valid in a given DMAContext. There is no equivalent for AddressSpace in the memory API, implement it with a lookup of the dispatch tree. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'dma-helpers.c')
-rw-r--r--dma-helpers.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/dma-helpers.c b/dma-helpers.c
index 272632f..2e298b6 100644
--- a/dma-helpers.c
+++ b/dma-helpers.c
@@ -298,6 +298,11 @@ bool iommu_dma_memory_valid(DMAContext *dma, dma_addr_t addr, dma_addr_t len,
plen = len;
}
+ if (!address_space_access_valid(dma->as, paddr, len,
+ dir == DMA_DIRECTION_FROM_DEVICE)) {
+ return false;
+ }
+
len -= plen;
addr += plen;
}