fw_cfg: Add support for LoongArch architecture

Qemu fw_cfg support was missing for LoongArch, which made some functions
unusable in virtual machines. So add the missing LoongArch defines.

Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-ID: <20260529140559.1775511-1-chenhuacai@loongson.cn>

diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig
index bbd2155d8483860f2287f021ae60f6392be035d1..9ec7477163899c28e34c31325eac7a27dd173dea 100644 (file)
--- a/drivers/firmware/Kconfig
+++ b/drivers/firmware/Kconfig
@@ -121,7 +121,7 @@ config RASPBERRYPI_FIRMWARE
 
 config FW_CFG_SYSFS
        tristate "QEMU fw_cfg device support in sysfs"
-       depends on SYSFS && (ARM || ARM64 || PARISC || PPC_PMAC || RISCV || SPARC || X86)
+       depends on SYSFS && (ARM || ARM64 || LOONGARCH || 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 87a5421bc7d5e3f03ad94d8d407dcc82ff0578cc..0c51a9df589f54c8652c63725f21dcbd52398a54 100644 (file)
--- 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) || defined(CONFIG_RISCV))
+# if (defined(CONFIG_ARM) || defined(CONFIG_ARM64) || defined(CONFIG_LOONGARCH) || defined(CONFIG_RISCV))
 #  define FW_CFG_CTRL_OFF 0x08
 #  define FW_CFG_DATA_OFF 0x00
 #  define FW_CFG_DMA_OFF 0x10