Support ROM blobs not mapped into guest memory: let user pass in MR for memory serving as the backing store.
Signed-off-by: Michael S. Tsirkin mst@redhat.com --- hw/core/loader.c | 32 +++++++++++++++++++++++++++++--- hw/lm32/lm32_hwsetup.h | 2 +- include/hw/loader.h | 4 ++-- 3 files changed, 32 insertions(+), 6 deletions(-)
diff --git a/hw/core/loader.c b/hw/core/loader.c index d569636..1ead722 100644 --- a/hw/core/loader.c +++ b/hw/core/loader.c @@ -542,6 +542,7 @@ struct Rom { size_t datasize;
uint8_t *data; + MemoryRegion *mr; int isrom; char *fw_dir; char *fw_file; @@ -641,7 +642,7 @@ err: }
int rom_add_blob(const char *name, const void *blob, size_t len, - hwaddr addr) + hwaddr addr, MemoryRegion *mr) { Rom *rom;
@@ -651,6 +652,11 @@ int rom_add_blob(const char *name, const void *blob, size_t len, rom->romsize = len; rom->datasize = len; rom->data = g_malloc0(rom->datasize); + rom->mr = mr; + if (mr) { + assert(memory_region_is_ram(mr)); + rom->isrom = memory_region_is_rom(mr); + } memcpy(rom->data, blob, len); rom_insert(rom); return 0; @@ -697,7 +703,12 @@ static void rom_reset(void *unused) if (rom->data == NULL) { continue; } - cpu_physical_memory_write_rom(rom->addr, rom->data, rom->datasize); + if (rom->mr) { + void *host = memory_region_get_ram_ptr(rom->mr); + memcpy(host, rom->data, rom->datasize); + } else { + cpu_physical_memory_write_rom(rom->addr, rom->data, rom->datasize); + } if (rom->isrom) { /* rom needs to be written only once */ g_free(rom->data); @@ -713,6 +724,9 @@ int rom_load_all(void) Rom *rom;
QTAILQ_FOREACH(rom, &roms, next) { + if (rom->mr) { + continue; + } if (rom->fw_file) { continue; } @@ -746,6 +760,9 @@ static Rom *find_rom(hwaddr addr) if (rom->fw_file) { continue; } + if (rom->mr) { + continue; + } if (rom->addr > addr) { continue; } @@ -773,6 +790,9 @@ int rom_copy(uint8_t *dest, hwaddr addr, size_t size) if (rom->fw_file) { continue; } + if (rom->mr) { + continue; + } if (rom->addr + rom->romsize < addr) { continue; } @@ -832,7 +852,13 @@ void do_info_roms(Monitor *mon, const QDict *qdict) Rom *rom;
QTAILQ_FOREACH(rom, &roms, next) { - if (!rom->fw_file) { + if (rom->mr) { + monitor_printf(mon, "%s" + " size=0x%06zx name="%s"\n", + rom->mr->name, + rom->romsize, + rom->name); + } else if (!rom->fw_file) { monitor_printf(mon, "addr=" TARGET_FMT_plx " size=0x%06zx mem=%s name="%s"\n", rom->addr, rom->romsize, diff --git a/hw/lm32/lm32_hwsetup.h b/hw/lm32/lm32_hwsetup.h index 3449bd8..d6914d6 100644 --- a/hw/lm32/lm32_hwsetup.h +++ b/hw/lm32/lm32_hwsetup.h @@ -73,7 +73,7 @@ static inline void hwsetup_free(HWSetup *hw) static inline void hwsetup_create_rom(HWSetup *hw, hwaddr base) { - rom_add_blob("hwsetup", hw->data, TARGET_PAGE_SIZE, base); + rom_add_blob("hwsetup", hw->data, TARGET_PAGE_SIZE, base, NULL); }
static inline void hwsetup_add_u8(HWSetup *hw, uint8_t u) diff --git a/include/hw/loader.h b/include/hw/loader.h index 15d4cc9..b39e7d1 100644 --- a/include/hw/loader.h +++ b/include/hw/loader.h @@ -27,7 +27,7 @@ void pstrcpy_targphys(const char *name, int rom_add_file(const char *file, const char *fw_dir, hwaddr addr, int32_t bootindex); int rom_add_blob(const char *name, const void *blob, size_t len, - hwaddr addr); + hwaddr addr, MemoryRegion *mr); int rom_add_elf_program(const char *name, void *data, size_t datasize, size_t romsize, hwaddr addr); int rom_load_all(void); @@ -39,7 +39,7 @@ void do_info_roms(Monitor *mon, const QDict *qdict); #define rom_add_file_fixed(_f, _a, _i) \ rom_add_file(_f, NULL, _a, _i) #define rom_add_blob_fixed(_f, _b, _l, _a) \ - rom_add_blob(_f, _b, _l, _a) + rom_add_blob(_f, _b, _l, _a, NULL)
#define PC_ROM_MIN_VGA 0xc0000 #define PC_ROM_MIN_OPTION 0xc8000