diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/hw/nvram/fw_cfg.h | 10 |
1 files changed, 3 insertions, 7 deletions
diff --git a/include/hw/nvram/fw_cfg.h b/include/hw/nvram/fw_cfg.h index 4b5e196d17..a1cfaa4a2f 100644 --- a/include/hw/nvram/fw_cfg.h +++ b/include/hw/nvram/fw_cfg.h @@ -183,13 +183,9 @@ void fw_cfg_add_file(FWCfgState *s, const char *filename, void *data, * structure residing at key value FW_CFG_FILE_DIR, containing the item name, * data size, and assigned selector key value. * Additionally, set a callback function (and argument) to be called each - * time a byte is read by the guest from this particular item, or, in the - * case of DMA, each time a read or skip request overlaps with the valid - * offset range of the item. - * NOTE: In addition to the opaque argument set here, the callback function - * takes the current data offset as an additional argument, allowing it the - * option of only acting upon specific offset values (e.g., 0, before the - * first data byte of the selected item is returned to the guest). + * time this item is selected (by having its selector key either written to + * the fw_cfg control register, or passed to QEMU in FWCfgDmaAccess.control + * with FW_CFG_DMA_CTL_SELECT). */ void fw_cfg_add_file_callback(FWCfgState *s, const char *filename, FWCfgReadCallback callback, void *callback_opaque, |