diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/exec/memattrs.h | 5 | ||||
| -rw-r--r-- | include/exec/memory.h | 3 |
2 files changed, 6 insertions, 2 deletions
diff --git a/include/exec/memattrs.h b/include/exec/memattrs.h index 060b7e7..8db1d30 100644 --- a/include/exec/memattrs.h +++ b/include/exec/memattrs.h @@ -44,6 +44,8 @@ typedef struct MemTxAttrs { * (see MEMTX_ACCESS_ERROR). */ unsigned int memory:1; + /* Debug access that can even write to ROM. */ + unsigned int debug:1; /* Requester ID (for MSI for example) */ unsigned int requester_id:16; @@ -56,7 +58,8 @@ typedef struct MemTxAttrs { * Bus masters which don't specify any attributes will get this * (via the MEMTXATTRS_UNSPECIFIED constant), so that we can * distinguish "all attributes deliberately clear" from - * "didn't specify" if necessary. + * "didn't specify" if necessary. "debug" can be set alongside + * "unspecified". */ bool unspecified; diff --git a/include/exec/memory.h b/include/exec/memory.h index b18ecf9..78c4e0a 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -3018,7 +3018,8 @@ static inline bool memory_access_is_direct(MemoryRegion *mr, bool is_write, if (!memory_region_supports_direct_access(mr)) { return false; } - if (is_write) { + /* Debug access can write to ROM. */ + if (is_write && !attrs.debug) { return !mr->readonly && !mr->rom_device; } return true; |