In the latest release of qemu (qemu 6.0.0 or higher) riscv virt already supports fw_cfg, but drivers/firmware/qemu_fw_cfg not support.
Signed-off-by: xiaoming <2014500...@smail.xtu.edu.cn> --- drivers/firmware/Kconfig | 2 +- drivers/firmware/qemu_fw_cfg.c | 4 ++++ 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig index 1db738d5b..4eb8d8a3a 100644 --- a/drivers/firmware/Kconfig +++ b/drivers/firmware/Kconfig @@ -186,7 +186,7 @@ config RASPBERRYPI_FIRMWARE config FW_CFG_SYSFS tristate "QEMU fw_cfg device support in sysfs" - depends on SYSFS && (ARM || ARM64 || PARISC || PPC_PMAC || SPARC || X86) + depends on SYSFS && (ARM || ARM64 || PARISC || PPC_PMAC || SPARC || X86 || RISCV) depends on HAS_IOPORT_MAP default n help diff --git a/drivers/firmware/qemu_fw_cfg.c b/drivers/firmware/qemu_fw_cfg.c index 172c751a4..36b5b2612 100644 --- a/drivers/firmware/qemu_fw_cfg.c +++ b/drivers/firmware/qemu_fw_cfg.c @@ -225,6 +225,10 @@ static void fw_cfg_io_cleanup(void) # define FW_CFG_CTRL_OFF 0x00 # define FW_CFG_DATA_OFF 0x01 # define FW_CFG_DMA_OFF 0x04 +# elif defined(CONFIG_RISCV) +# define FW_CFG_CTRL_OFF 0x08 +# define FW_CFG_DATA_OFF 0x00 +# define FW_CFG_DMA_OFF 0x10 # else # error "QEMU FW_CFG not available on this architecture!" # endif -- 2.17.1