diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/exec/memory.h | 15 | ||||
| -rw-r--r-- | include/sysemu/dma.h | 3 |
2 files changed, 17 insertions, 1 deletions
diff --git a/include/exec/memory.h b/include/exec/memory.h index 688d3f0e96..81e0e416a4 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -866,6 +866,21 @@ MemoryRegionSection *address_space_translate(AddressSpace *as, hwaddr addr, hwaddr *xlat, hwaddr *len, bool is_write); +/* address_space_access_valid: check for validity of accessing an address + * space range + * + * Check whether memory is assigned to the given address space range. + * + * For now, addr and len should be aligned to a page size. This limitation + * will be lifted in the future. + * + * @as: #AddressSpace to be accessed + * @addr: address within that address space + * @len: length of the area to be checked + * @is_write: indicates the transfer direction + */ +bool address_space_access_valid(AddressSpace *as, hwaddr addr, int len, bool is_write); + /* address_space_map: map a physical memory region into a host virtual address * * May map a subset of the requested range, given by and returned in @plen. diff --git a/include/sysemu/dma.h b/include/sysemu/dma.h index a52c93a553..02e0dcdfeb 100644 --- a/include/sysemu/dma.h +++ b/include/sysemu/dma.h @@ -113,7 +113,8 @@ static inline bool dma_memory_valid(DMAContext *dma, DMADirection dir) { if (!dma_has_iommu(dma)) { - return true; + return address_space_access_valid(dma->as, addr, len, + dir == DMA_DIRECTION_FROM_DEVICE); } else { return iommu_dma_memory_valid(dma, addr, len, dir); } |