From: "Björn Töpel" <bjorn@kernel.org>
To: Gabriel Somlo <somlo@cmu.edu>,
"Michael S. Tsirkin" <mst@redhat.com>,
qemu-devel@nongnu.org
Cc: "Björn Töpel" <bjorn@rivosinc.com>,
linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org,
"Alistair Francis" <alistair.francis@wdc.com>,
"Clément Léger" <cleger@rivosinc.com>
Subject: [PATCH v2] riscv, qemu_fw_cfg: Add support for RISC-V architecture
Date: Thu, 12 Oct 2023 12:28:52 +0200 [thread overview]
Message-ID: <20231012102852.234442-1-bjorn@kernel.org> (raw)
From: Björn Töpel <bjorn@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 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>
---
v2: Fixed typo (Clément)
...and collected A-b/T-bs
---
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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reply other threads:[~2023-10-12 10:29 UTC|newest]
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