From nobody Fri Jan 2 13:27:17 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 86F04CD6E60 for ; Wed, 11 Oct 2023 11:47:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1346029AbjJKLrg (ORCPT ); Wed, 11 Oct 2023 07:47:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42432 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234760AbjJKLr3 (ORCPT ); Wed, 11 Oct 2023 07:47:29 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C74F398 for ; Wed, 11 Oct 2023 04:47:28 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 073EAC433C9; Wed, 11 Oct 2023 11:47:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1697024848; bh=5eol+w9isDPPTceO0nec+Q5JC7nAOskqOPXHsIAf75Q=; h=From:To:Cc:Subject:Date:From; b=rn63VAU0/bWUAp3lCxWWpkSw9gd9a42ATMVADGPkaClKeM6rE5K2L3RtE0+uAMYeS 8tu7jbJSDzs+gLhP+5LZK8j8Gg4F8Zr4jd2pf1PuhaPXprA9XeS6lu5f/Kd20pxWTg qc5D1dnzOnztti8h0IlLDHg52+bahm8Edro1oexxTO5TnwfqWAbL8wMybH7HVghNXB 2v/XkKWu1P9WLthhCx5fxuV55ZKZZUflHJypPLIg/WT/62a/6c2Tume2Yc8hcl00S6 ptFuxGkq6EEdNl3n7SW7ygbHETur+TiHQXsOpzFXjkkqLpfLjKJmHDms62y6rfV3ts 7BAeo8HCGH/5A== From: =?UTF-8?q?Bj=C3=B6rn=20T=C3=B6pel?= To: Gabriel Somlo , "Michael S. Tsirkin" , qemu-devel@nongnu.org Cc: =?UTF-8?q?Bj=C3=B6rn=20T=C3=B6pel?= , linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org Subject: [PATCH] riscv, qemu_fw_cfg: Add support for RISC-V architecture Date: Wed, 11 Oct 2023 13:47:21 +0200 Message-Id: <20231011114721.193732-1-bjorn@kernel.org> X-Mailer: git-send-email 2.39.2 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Bj=C3=B6rn T=C3=B6pel 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: Bj=C3=B6rn T=C3=B6pel Acked-by: Alistair Francis Acked-by: Michael S. Tsirkin Tested-by: Cl=C3=A9ment L=C3=A9ger --- 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 =20 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) =20 /* arch-specific ctrl & data register offsets are not available in ACPI, D= T */ #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 --=20 2.39.2