From nobody Fri Sep 12 07:10:21 2025 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 7A288C05027 for ; Sun, 12 Feb 2023 20:55:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229631AbjBLUzM (ORCPT ); Sun, 12 Feb 2023 15:55:12 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47226 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229477AbjBLUzK (ORCPT ); Sun, 12 Feb 2023 15:55:10 -0500 Received: from mail-qv1-xf2b.google.com (mail-qv1-xf2b.google.com [IPv6:2607:f8b0:4864:20::f2b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C71A4F75E for ; Sun, 12 Feb 2023 12:55:09 -0800 (PST) Received: by mail-qv1-xf2b.google.com with SMTP id i5so2619692qvp.6 for ; Sun, 12 Feb 2023 12:55:09 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=vQdHW+PhZq9WcInZ2+SoRq4atvNxsCBkR2bKm9EuIOs=; b=GkttBvPlAObOivWdQ0mXQJnKbbGtSDX0YG4FGKozO5eqFdmh2+9C3DSiMsnK6F5Xma /sa+Usls+PdZKAGCKeHzxJUlUh641FtZ7jrtlshH3zNja8o4XZ35goIqz9nJ9JrfczET Sp2MzSAOi5Mx6KSt//w+0/74AbweY6E+c9Taqz50P52EQihVyktFL1MXjMFP/rNIrc4R nzqVh+NAo/xMF0zWYjH++GsLAVPBM1ER3CUCgcmRV3DjeIq2erLqdlbhfF9jpK/jbmlX 0g2tp0S0Eexk0yqkBqaKx1s3/qEqGch0MMvQycUlGZcl4r5wnJMFTnSaag2Gx+39JGek t7Ag== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=vQdHW+PhZq9WcInZ2+SoRq4atvNxsCBkR2bKm9EuIOs=; b=lLV/jb4TtnwM6Vfi1qcCiUCE6Fo08gnQAfhjJz+28PuYW3KnyWARVr9cY+/FHy6DX/ r39llzHPmeOsUgqbTbhYtS+dBPWeCABQ0fYuxaZLMuoKy8hoPvb7U3MPU6nM7ZfPclUz XTWH9jsurBaZRzpWDweRDHEpK2Ub4xmRRkDvWv7avG4ASq5wGeDkqDAWfMFLvoeRygn2 lxCqMV7g/BN7dVlVNJ5goz/wxXaxHKNuMsNdK3T47rbTkfYIV/z/hqGf7Cv2cpNNOAAI tEA1lnN7Jd2v+6U7XpsRskBizLTEqIOpeyO9jfUn5u+/9nY3TYw10laNaDBTTQThPuDK 4/Aw== X-Gm-Message-State: AO0yUKVl8YLIMSwme4bdLO117+61mlo97lAKvTn+EzkRJFYYNtont+/5 P3raVn5WzuExj80kQ7SWAYk= X-Google-Smtp-Source: AK7set/7PO+QFexTHSQTgL0s0TsPzpuVBx6+y8AuSbEd+yCd227mmBNu++ZlMRl7YxkXXkgXnheaiQ== X-Received: by 2002:a05:6214:e61:b0:56b:ec1f:db0d with SMTP id jz1-20020a0562140e6100b0056bec1fdb0dmr33894218qvb.34.1676235308881; Sun, 12 Feb 2023 12:55:08 -0800 (PST) Received: from jesse-desktop.jtp-bos.lab (pool-108-26-182-112.bstnma.fios.verizon.net. [108.26.182.112]) by smtp.gmail.com with ESMTPSA id o62-20020a374141000000b0072ad54e36b2sm8289233qka.93.2023.02.12.12.55.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 12 Feb 2023 12:55:08 -0800 (PST) From: Jesse Taube X-Google-Original-From: Jesse Taube To: linux-riscv@lists.infradead.org Cc: linux-kernel@vger.kernel.org, Jesse Taube , Yimin Gu , Waldemar Brodkorb , Albert Ou , Palmer Dabbelt , Paul Walmsley , Conor Dooley , kernel test robot Subject: [PATCH v2 1/3] clk: k210: remove an implicit 64-bit division Date: Sun, 12 Feb 2023 15:55:04 -0500 Message-Id: <20230212205506.1992714-2-Mr.Bossman075@gmail.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230212205506.1992714-1-Mr.Bossman075@gmail.com> References: <20230212205506.1992714-1-Mr.Bossman075@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Conor Dooley The K210 clock driver depends on SOC_CANAAN, which is only selectable when !MMU on RISC-V. !MMU is not possible on 32-bit yet, but patches have been sent for its enabling. The kernel test robot reported this implicit 64-bit division there. Replace the implicit division with an explicit one. Reported-by: kernel test robot Link: https://lore.kernel.org/linux-riscv/202301201538.zNlqgE4L-lkp@intel.c= om/ Signed-off-by: Conor Dooley Signed-off-by: Jesse Taube --- drivers/clk/clk-k210.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/clk/clk-k210.c b/drivers/clk/clk-k210.c index 67a7cb3503c3..4eed667eddaf 100644 --- a/drivers/clk/clk-k210.c +++ b/drivers/clk/clk-k210.c @@ -495,7 +495,7 @@ static unsigned long k210_pll_get_rate(struct clk_hw *h= w, f =3D FIELD_GET(K210_PLL_CLKF, reg) + 1; od =3D FIELD_GET(K210_PLL_CLKOD, reg) + 1; =20 - return (u64)parent_rate * f / (r * od); + return div_u64((u64)parent_rate * f, r * od); } =20 static const struct clk_ops k210_pll_ops =3D { --=20 2.39.0 From nobody Fri Sep 12 07:10:21 2025 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 1D4DCC05027 for ; Sun, 12 Feb 2023 20:55:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229652AbjBLUzR (ORCPT ); Sun, 12 Feb 2023 15:55:17 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47232 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229523AbjBLUzL (ORCPT ); Sun, 12 Feb 2023 15:55:11 -0500 Received: from mail-qt1-x82e.google.com (mail-qt1-x82e.google.com [IPv6:2607:f8b0:4864:20::82e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 95FBAFF16 for ; Sun, 12 Feb 2023 12:55:10 -0800 (PST) Received: by mail-qt1-x82e.google.com with SMTP id q13so11958816qtx.2 for ; Sun, 12 Feb 2023 12:55:10 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=2Au6CyYPAK9MMu54GU8ZYr6dkPuGof5usEwyOLzycXk=; b=R5iDCdhKZDRcDyk6JEWeTsc3H3qiETZQnTUJtmJ7rVJMEcsUsSBA5yhUDN63euSzlh HHlW6D1ZkGAtKB3FEcWCEi7AeUU6SqXYGwnNkAOyEdoCu4NuZqU/NleRYmQ9CmXSTlv5 Zc017d0fbYZ8dQhPYHvX/d1QKIOmQwQXeOZyDrhwdqhIXy6BMfSoUeFEQWTCMtCa3fa0 9IC0+uNjJ+ZGv/dj/WgYIGF4thtFPnjmZRmg8B9kUhM5VinzObUMmmVq5IJ9yhE9JYLS bsu4EPDygZjMu2XYYpjt7zIJzhweyCR/XB3PCYvwFT/+6E7BZMRNHJNG+3cr5OzTpt+C mepg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=2Au6CyYPAK9MMu54GU8ZYr6dkPuGof5usEwyOLzycXk=; b=gFEQ7S4R+IyipfjeNCkK3elUwLLDpLTLyV6m78zH61LQKBgpIzHdltwjuzTrBDTWqr 2tjzV6WSjmQPumicOXtfRSH+qBAOcTy/Rw5gfTMWLhCDcjTtZmyFOgzt9PZa//jCLcpP 88M17rVdGB0pZTzzoIY5TDfsUEsix6fCe+7lTO9Jw6orqzOQhsSHkD19wYdewgxVA6p4 ZWauB4mzPV5RIwrf9LVgUrbeenEu+OCGLBRF+OsqMLl4EwuBmVlb3o63C5aYdfZiJcOu 58C69S6sVXmsyajwp8HrRim5cmTm2p0yL5ks+76d38NxeVval0TAymptkk1MbeClgOz3 ft7g== X-Gm-Message-State: AO0yUKWSkVu5OhM9eayBtja7jCVzzt3WUgt4eNTQF1+HbLb1l+lZ48wJ p4fvuWWF5XFBbvz5+aBsRe4= X-Google-Smtp-Source: AK7set+mdFGsW7vWxO83UMH+FHZxLgRCvHWUm7dPLycj8dlzQiwvTE/P6DPhram2BQe/Le8dmLYBvQ== X-Received: by 2002:ac8:5e92:0:b0:3b9:bc8c:c20a with SMTP id r18-20020ac85e92000000b003b9bc8cc20amr17289416qtx.21.1676235309701; Sun, 12 Feb 2023 12:55:09 -0800 (PST) Received: from jesse-desktop.jtp-bos.lab (pool-108-26-182-112.bstnma.fios.verizon.net. [108.26.182.112]) by smtp.gmail.com with ESMTPSA id o62-20020a374141000000b0072ad54e36b2sm8289233qka.93.2023.02.12.12.55.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 12 Feb 2023 12:55:09 -0800 (PST) From: Jesse Taube X-Google-Original-From: Jesse Taube To: linux-riscv@lists.infradead.org Cc: linux-kernel@vger.kernel.org, Jesse Taube , Yimin Gu , Waldemar Brodkorb , Albert Ou , Palmer Dabbelt , Paul Walmsley Subject: [PATCH v2 2/3] riscv: Kconfig: Allow RV32 to build with no MMU Date: Sun, 12 Feb 2023 15:55:05 -0500 Message-Id: <20230212205506.1992714-3-Mr.Bossman075@gmail.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230212205506.1992714-1-Mr.Bossman075@gmail.com> References: <20230212205506.1992714-1-Mr.Bossman075@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Yimin Gu Some RISC-V 32bit cores do not have an MMU, and the kernel should be able to build for them. This patch enables the RV32 to be built with no MMU support. Signed-off-by: Yimin Gu CC: Jesse Taube Tested-by: Waldemar Brodkorb Signed-off-by: Jesse Taube --- arch/riscv/Kconfig | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 59d18881f35b..49759dbe6a8f 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -163,8 +163,8 @@ config MMU =20 config PAGE_OFFSET hex - default 0xC0000000 if 32BIT - default 0x80000000 if 64BIT && !MMU + default 0xC0000000 if 32BIT && MMU + default 0x80000000 if !MMU default 0xff60000000000000 if 64BIT =20 config KASAN_SHADOW_OFFSET @@ -262,7 +262,6 @@ config ARCH_RV32I select GENERIC_LIB_ASHRDI3 select GENERIC_LIB_LSHRDI3 select GENERIC_LIB_UCMPDI2 - select MMU =20 config ARCH_RV64I bool "RV64I" --=20 2.39.0 From nobody Fri Sep 12 07:10:21 2025 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 5A293C636D4 for ; Sun, 12 Feb 2023 20:55:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229602AbjBLUzU (ORCPT ); Sun, 12 Feb 2023 15:55:20 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47238 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229632AbjBLUzM (ORCPT ); Sun, 12 Feb 2023 15:55:12 -0500 Received: from mail-qt1-x835.google.com (mail-qt1-x835.google.com [IPv6:2607:f8b0:4864:20::835]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 62C9AF75D for ; Sun, 12 Feb 2023 12:55:11 -0800 (PST) Received: by mail-qt1-x835.google.com with SMTP id 5so11919808qtp.9 for ; Sun, 12 Feb 2023 12:55:11 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=CvWquSrWDihZ0acdWJU0hmpgtyP5vfxrh4ZjBtKv7GY=; b=WNWzEb8TKQjRiPhehEQX7DRiF0/Z63jHq43yArV/dBCmlAsI1tKxNiT81JcFwOqny0 yu+MxWkK0EunFt8gijrANji4vbcteVxEkBlBDwbebRpUOtoaSGAw4PFS507An51wz8yi n2rcek9j14B+HNpZDw2q1d6n+bpi3CzPQ/5FSHQif1tg8DkbbP4F/gplofGk8Us7wUZP yO7LlAo/6P+ZoYa6POP11pScfnmiLiiIFDDVMQu9HkWKJ3RoV3+hxYBsl7cSXshCNkCx jKAychv4pUqiToMrhSVaWoJWboi4U7GtXMLI+pnJ8w18LFWwXPiroigNwc/lZ1ED1dbk RhUw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=CvWquSrWDihZ0acdWJU0hmpgtyP5vfxrh4ZjBtKv7GY=; b=CKxZT7dnl97Fj2sflumvMhynQNI3Akh9TYjOSU/YfXVvHXSmgQoYMnrb706OEs0IHT tJZEozc2fzaY7I24zhb/1Bq/NPhg3vBUUOF+NGsWBhdUPu0JgdxhokZqkQzqlM6wTydx icKJv+f4qfm2Bjwrb/ClxT9jZc6QXtsZgzrGp7AUTkfiT0bEpRXE3uCx3/l34gE69Ib3 zed9OetTIIejAPEUFH9ZqK0qgjSxguuwxHUiru2Aw+DHFp5NOi9SMZQpqFQOpRuH6ecP EcZMo1+VEWRc3EgAwVhlROkFv1jIT9ruH4r6OlMf69TTiRcfmGfEFI3UhzLwmkNyj0J5 Z6Uw== X-Gm-Message-State: AO0yUKWTRBigeB+ehfPQzPd8nihSo3X5Zy1tnapwySyTTJXlGcchXhDp 1PwencBOeLSy/RMKXi6FduA= X-Google-Smtp-Source: AK7set/xtp4Wf2aA37Exq3ClOp0kX71cmUo1VJxyVPprCWafZdvKJIGxNGYF41HOd0BCPxlMuXvyWg== X-Received: by 2002:ac8:5cca:0:b0:3ab:ceb9:10fd with SMTP id s10-20020ac85cca000000b003abceb910fdmr40007531qta.25.1676235310522; Sun, 12 Feb 2023 12:55:10 -0800 (PST) Received: from jesse-desktop.jtp-bos.lab (pool-108-26-182-112.bstnma.fios.verizon.net. [108.26.182.112]) by smtp.gmail.com with ESMTPSA id o62-20020a374141000000b0072ad54e36b2sm8289233qka.93.2023.02.12.12.55.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 12 Feb 2023 12:55:10 -0800 (PST) From: Jesse Taube X-Google-Original-From: Jesse Taube To: linux-riscv@lists.infradead.org Cc: linux-kernel@vger.kernel.org, Jesse Taube , Yimin Gu , Waldemar Brodkorb , Albert Ou , Palmer Dabbelt , Paul Walmsley Subject: [PATCH v2 3/3] riscv: configs: Add nommu defconfig for RV32 Date: Sun, 12 Feb 2023 15:55:06 -0500 Message-Id: <20230212205506.1992714-4-Mr.Bossman075@gmail.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230212205506.1992714-1-Mr.Bossman075@gmail.com> References: <20230212205506.1992714-1-Mr.Bossman075@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" 32bit risc-v can be configured to run without MMU. This patch adds an example configuration for RV32 nommu virtual machine. Signed-off-by: Jesse Taube Cc: Yimin Gu --- arch/riscv/configs/rv32_nommu_virt_defconfig | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) create mode 100644 arch/riscv/configs/rv32_nommu_virt_defconfig diff --git a/arch/riscv/configs/rv32_nommu_virt_defconfig b/arch/riscv/conf= igs/rv32_nommu_virt_defconfig new file mode 100644 index 000000000000..460907253a80 --- /dev/null +++ b/arch/riscv/configs/rv32_nommu_virt_defconfig @@ -0,0 +1,16 @@ +CONFIG_BLK_DEV_INITRD=3Dy +# CONFIG_MMU is not set +CONFIG_COMPAT_32BIT_TIME=3Dy +CONFIG_SOC_VIRT=3Dy +CONFIG_NONPORTABLE=3Dy +CONFIG_ARCH_RV32I=3Dy +CONFIG_BINFMT_FLAT=3Dy +CONFIG_SLOB=3Dy +CONFIG_VIRTIO_BLK=3Dy +CONFIG_SERIAL_8250=3Dy +CONFIG_SERIAL_8250_CONSOLE=3Dy +CONFIG_SERIAL_OF_PLATFORM=3Dy +CONFIG_VIRTIO_MMIO=3Dy +CONFIG_VIRTIO_MMIO_CMDLINE_DEVICES=3Dy +CONFIG_EXT2_FS=3Dy +CONFIG_PRINTK_TIME=3Dy --=20 2.39.0