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authorBjörn Töpel <bjorn@rivosinc.com>2023-10-12 13:28:52 +0300
committerMichael S. Tsirkin <mst@redhat.com>2023-11-01 16:31:16 +0300
commitf2de37a572853d340f945a7748f74e3ed8c6b743 (patch)
tree74dbab1dc67486573fd42f9fb6d60cab5b6c66d0 /drivers/firmware
parent0d82410252ea324f0064e75b9865bb74cccc1dda (diff)
downloadlinux-f2de37a572853d340f945a7748f74e3ed8c6b743.tar.xz
riscv, qemu_fw_cfg: Add support for RISC-V architecture
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 monitor: (qemu) dump-guest-memory vmcore The vmcore can now be used, e.g., with the "crash" utility. Acked-by: "Michael S. Tsirkin" <mst@redhat.com> Acked-by: Alistair Francis <alistair.francis@wdc.com> Tested-by: Clément Léger <cleger@rivosinc.com> Signed-off-by: Björn Töpel <bjorn@rivosinc.com> Message-Id: <20231012102852.234442-1-bjorn@kernel.org> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/firmware')
-rw-r--r--drivers/firmware/Kconfig2
-rw-r--r--drivers/firmware/qemu_fw_cfg.c2
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