[PATCH] riscv, qemu_fw_cfg: Add support for RISC-V architecture
Michael S. Tsirkin
mst at redhat.com
Thu Oct 12 02:46:36 PDT 2023
On Wed, Oct 11, 2023 at 01:47:21PM +0200, Björn Töpel wrote:
> From: Björn Töpel <bjorn at rivosinc.com>
>
> Qemu fw_cfg support was missing for RISC-V, which made it hard to do
> proper vmcore dumps from qemu.
>
> Add the missing RISC-V arch-defines.
>
> You can now do vmcore dumps from qemu. Add "-device vmcoreinfo" to the
> qemu command-line. From the qemu montior:
> (qemu) dump-guest-memory vmcore
>
> The vmcore can now be used, e.g., with the "crash" utility.
>
> Signed-off-by: Björn Töpel <bjorn at rivosinc.com>
> ---
with typo fixed:
Acked-by: Michael S. Tsirkin <mst at redhat.com>
> drivers/firmware/Kconfig | 2 +-
> drivers/firmware/qemu_fw_cfg.c | 2 +-
> 2 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig
> index b59e3041fd62..f05ff56629b3 100644
> --- a/drivers/firmware/Kconfig
> +++ b/drivers/firmware/Kconfig
> @@ -155,7 +155,7 @@ 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 || RISCV || SPARC || X86)
> 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 a69399a6b7c0..1448f61173b3 100644
> --- a/drivers/firmware/qemu_fw_cfg.c
> +++ b/drivers/firmware/qemu_fw_cfg.c
> @@ -211,7 +211,7 @@ static void fw_cfg_io_cleanup(void)
>
> /* arch-specific ctrl & data register offsets are not available in ACPI, DT */
> #if !(defined(FW_CFG_CTRL_OFF) && defined(FW_CFG_DATA_OFF))
> -# if (defined(CONFIG_ARM) || defined(CONFIG_ARM64))
> +# if (defined(CONFIG_ARM) || defined(CONFIG_ARM64) || defined(CONFIG_RISCV))
> # define FW_CFG_CTRL_OFF 0x08
> # define FW_CFG_DATA_OFF 0x00
> # define FW_CFG_DMA_OFF 0x10
>
> base-commit: 1c8b86a3799f7e5be903c3f49fcdaee29fd385b5
> --
> 2.39.2
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