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([2600:1700:e321:62f0:329c:23ff:fee3:9d7c]) by smtp.gmail.com with ESMTPSA id w8-20020a056830410800b00605b48122eesm53063ott.14.2022.04.24.08.28.20 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 24 Apr 2022 08:28:23 -0700 (PDT) Message-ID: <3df135a2-17f5-d6c6-b4a8-e1a60e254297@roeck-us.net> Date: Sun, 24 Apr 2022 08:28:19 -0700 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.7.0 Content-Language: en-US To: Arnd Bergmann References: <20220419163810.2118169-1-arnd@kernel.org> <20220422170530.GA2338209@roeck-us.net> <8b36d3a4-ec85-2f9f-e4b7-734d8ddd3d8f@roeck-us.net> <20220422234150.GA3442771@roeck-us.net> <3b4046ed-fd75-13ea-fac3-06469172806c@roeck-us.net> From: Guenter Roeck Subject: Re: [PATCH v2 00/48] ARM: PXA multiplatform support In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Ulf Hansson , USB list , "Rafael J. Wysocki" , Viresh Kumar , Linux Fbdev development list , Dominik Brodowski , "open list:BROADCOM NVRAM DRIVER" , IDE-ML , linux-mtd , Tomas Cech , Robert Jarzmik , linux-clk , linux-leds@vger.kernel.org, linux-rtc@vger.kernel.org, Helge Deller , Marek Vasut , Paul Parsons , Sergey Lapin , Arnd Bergmann , Linux PM list , "open list:HID CORE LAYER" , Haojian Zhuang , Lubomir Rintel , Mark Brown , dri-devel , Linux ARM , Thomas Bogendoerfer , Stephen Boyd , patches@opensource.cirrus.com, Dmitry Torokhov , linux-mmc , Linux Kernel Mailing List , Michael Turquette , ALSA Development Mailing List , Daniel Mack Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" On 4/24/22 01:52, Arnd Bergmann wrote: > On Sun, Apr 24, 2022 at 4:09 AM Guenter Roeck wrote: >> On 4/23/22 12:55, Arnd Bergmann wrote: >>> On Sat, Apr 23, 2022 at 1:41 AM Guenter Roeck wrote: >>>> On Sat, Apr 23, 2022 at 12:04:31AM +0200, Arnd Bergmann wrote: >>> >>> Odd, I can't reproduce this at all. Do you get any console output at >>> all for this? >>> >>> Is this the plain omap1_defconfig, or something else? >>> >> >> No, it is my own sx1 specific configuration. >> >> https://github.com/groeck/linux-build-test/blob/master/rootfs/arm/qemu_sx1_defconfig >> >> I don't recall where I got it from but ... > > Ok, that explains it, thanks! > > I fixed all the defconfig files that come with the kernel, but for your own > ones you have to add > > # CONFIG_ARCH_MULTI_V7 is not set > > into the defconfig file, otherwise the multiplatform target defaults to > an ARMv7 instead of ARMv5 build. For an OMAP15xx as in the SX1, > you also need to enable CONFIG_ARCH_MULTI_V4T. > > This is slightly unfortunate, but I don't see any way to avoid it, and the > modified defconfig will still work fine with older kernel trees. > Yes, that works. I changed it in my configuration. >>> One thing I keep having to apply myself is this snippet: >>> >>> diff --git a/arch/arm/mm/proc-arm925.S b/arch/arm/mm/proc-arm925.S >>> index 0bfad62ea858..87c695703580 100644 >>> --- a/arch/arm/mm/proc-arm925.S >>> +++ b/arch/arm/mm/proc-arm925.S >>> @@ -441,7 +441,6 @@ __arm925_setup: >>> >>> #ifdef CONFIG_CPU_DCACHE_WRITETHROUGH >>> mov r0, #4 @ disable write-back >>> on caches explicitly >>> - mcr p15, 7, r0, c15, c0, 0 >>> #endif >> >> it does not have CONFIG_CPU_DCACHE_WRITETHROUGH enabled. > > Maybe it was disabled explicitly for the sx1_defconfig because of this > bug. I would think that this is required for actual sx1 hardware because the > option is default-enabled for ARM925T, and that CPU core is exclusively > used in OMAP15xx. > That looks like a bug in qemu. ARM925T instruction support is limited to V4T instructions. qemu doesn't have explicit 5T support. It is either V4T or V5. Guenter From mboxrd@z Thu Jan 1 00:00:00 1970 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id D554FC433F5 for ; Sun, 24 Apr 2022 15:31:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Content-Type: Content-Transfer-Encoding:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:Subject:From:References:Cc:To: MIME-Version:Date:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=uDqy9GjKnTemiTcPvKzPPsTQxDCenQLg+kiarZD0pHw=; b=vcKWLDZIOYSPn7 HGzEGIfGfICSmp+2HcuYpcc1ww4ryxlSq3zNFIaq7ureCe6BWVtyOwp+mwCzdcTlLbic8yzoPJq/7 g1hdwfcZ1rN7zsRYm3YAH0UPqqcm+Bo3VzsmdT8wBekrtT1QLsaMyZNIfSv/8qgO+Ra+k1Eg1iArh +howajwlA/z+PQejhXdTPwPJbg9CHprYejAalCV77vCDbzX92ZDMsIXiCvneiatdeEmtjDJQIvPYg dPI2pRO5/k9m11pwJO8aydwAhgfDVZPtkaArORbUDzjAG9LpAfaWpEOO3JtkTAooS3SWq/W5Jr/JF Q6Y3MP0YMwm5W3Y1ZSkw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nieBt-006pwY-Ql; Sun, 24 Apr 2022 15:30:25 +0000 Received: from mail-oi1-x229.google.com ([2607:f8b0:4864:20::229]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nie9x-006pDn-Kt; Sun, 24 Apr 2022 15:28:29 +0000 Received: by mail-oi1-x229.google.com with SMTP id l203so3700250oif.0; Sun, 24 Apr 2022 08:28:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=sender:message-id:date:mime-version:user-agent:content-language:to :cc:references:from:subject:in-reply-to:content-transfer-encoding; bh=yr0/AkbMMu8pn1dkU35YlQmF7na7yjrNnK/horRQvq8=; b=YTsJBncPwlsdJoy0clMDPkRYsap010NbelrrDwP4gT2p8VkAeOwyCadOMVg4EkLC3g BU6v4rcHRP7TcChruJdux/6WqtJmUToOWUlOimc0ldD0p/STL+v6YSxQqTz/SiEj3JGk 6SfYzDXOC60C+Zk6YtFsjMz2c7gYsvaefbEF/eKAM03STJHCFm25OuC/Z0YH/2cfNqkA U538FM4O480tv4oZ6rwPTTcYDvIV4RyyrEvA6n7gY5KKJPB4B+s22HrjImpN8j9osv2G SEdJ9k63zxNOgRDgM+KmfcxMquHhbq8CJJjUKerT4sEDujG7ogRPrwOnyNIjdLCE9lFh BU0Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:sender:message-id:date:mime-version:user-agent :content-language:to:cc:references:from:subject:in-reply-to :content-transfer-encoding; bh=yr0/AkbMMu8pn1dkU35YlQmF7na7yjrNnK/horRQvq8=; b=GFMZEKhblxFuOxvbMuBjIQ7rdzRX/0WOmHOubLvApD4N1D4X8HytGLj7P2XsZnceRx xYhUw9+RbK/thFCdR2mfIKKPsrDVhEWiZBXbC527ChENPKQKHt8HBac7+aaduy5ybbLe JTeU0YFoiJdfy+wneKiaKhL5uaKv17soIqKPh2i+a0VuN6dX8DRi+cDxW1ynIAatw/6M 4OTnmTlc5EGlLaO5e2PHW3EJJwr/3pDL0PVcbR23YLhcIZ0gC2ilXgOgUWisSsx4PuJ8 MI1aOtrKXQ5FtrZhUqb33t/cvHZiDKA3J5C9i8x8QI3n2eV+R3iw5C1bU5toIwexHbl7 D5BQ== X-Gm-Message-State: AOAM532xzhXILjEgCnDvY7ywgM2WsBGXtWLXGLsU+Iq4+AKF2kVka9yD knX1fQrRfrvOoBHOE+5gskIeUR8UmoY= X-Google-Smtp-Source: ABdhPJy+gDyQI+jYYZai2x5URiEV01l+fMZDWT8YjU8/GgIriEk0FB5ZVdkvpb6NfVQx+IMk0aUfQA== X-Received: by 2002:aca:f286:0:b0:2da:58ba:c578 with SMTP id q128-20020acaf286000000b002da58bac578mr6576017oih.127.1650814104777; Sun, 24 Apr 2022 08:28:24 -0700 (PDT) Received: from ?IPV6:2600:1700:e321:62f0:329c:23ff:fee3:9d7c? ([2600:1700:e321:62f0:329c:23ff:fee3:9d7c]) by smtp.gmail.com with ESMTPSA id w8-20020a056830410800b00605b48122eesm53063ott.14.2022.04.24.08.28.20 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 24 Apr 2022 08:28:23 -0700 (PDT) Message-ID: <3df135a2-17f5-d6c6-b4a8-e1a60e254297@roeck-us.net> Date: Sun, 24 Apr 2022 08:28:19 -0700 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.7.0 Content-Language: en-US To: Arnd Bergmann Cc: Robert Jarzmik , Linux ARM , Arnd Bergmann , Daniel Mack , Haojian Zhuang , Marek Vasut , Philipp Zabel , Lubomir Rintel , Paul Parsons , Tomas Cech , Sergey Lapin , Thomas Bogendoerfer , Michael Turquette , Stephen Boyd , "Rafael J. Wysocki" , Viresh Kumar , Dmitry Torokhov , Ulf Hansson , Dominik Brodowski , Helge Deller , Mark Brown , Linus Walleij , Linux Kernel Mailing List , "open list:BROADCOM NVRAM DRIVER" , IDE-ML , linux-clk , Linux PM list , "open list:HID CORE LAYER" , patches@opensource.cirrus.com, linux-leds@vger.kernel.org, linux-mmc , linux-mtd , linux-rtc@vger.kernel.org, USB list , Linux Fbdev development list , dri-devel , ALSA Development Mailing List References: <20220419163810.2118169-1-arnd@kernel.org> <20220422170530.GA2338209@roeck-us.net> <8b36d3a4-ec85-2f9f-e4b7-734d8ddd3d8f@roeck-us.net> <20220422234150.GA3442771@roeck-us.net> <3b4046ed-fd75-13ea-fac3-06469172806c@roeck-us.net> From: Guenter Roeck Subject: Re: [PATCH v2 00/48] ARM: PXA multiplatform support In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220424_082825_769512_ACBCE073 X-CRM114-Status: GOOD ( 29.95 ) X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org On 4/24/22 01:52, Arnd Bergmann wrote: > On Sun, Apr 24, 2022 at 4:09 AM Guenter Roeck wrote: >> On 4/23/22 12:55, Arnd Bergmann wrote: >>> On Sat, Apr 23, 2022 at 1:41 AM Guenter Roeck wrote: >>>> On Sat, Apr 23, 2022 at 12:04:31AM +0200, Arnd Bergmann wrote: >>> >>> Odd, I can't reproduce this at all. Do you get any console output at >>> all for this? >>> >>> Is this the plain omap1_defconfig, or something else? >>> >> >> No, it is my own sx1 specific configuration. >> >> https://github.com/groeck/linux-build-test/blob/master/rootfs/arm/qemu_sx1_defconfig >> >> I don't recall where I got it from but ... > > Ok, that explains it, thanks! > > I fixed all the defconfig files that come with the kernel, but for your own > ones you have to add > > # CONFIG_ARCH_MULTI_V7 is not set > > into the defconfig file, otherwise the multiplatform target defaults to > an ARMv7 instead of ARMv5 build. For an OMAP15xx as in the SX1, > you also need to enable CONFIG_ARCH_MULTI_V4T. > > This is slightly unfortunate, but I don't see any way to avoid it, and the > modified defconfig will still work fine with older kernel trees. > Yes, that works. I changed it in my configuration. >>> One thing I keep having to apply myself is this snippet: >>> >>> diff --git a/arch/arm/mm/proc-arm925.S b/arch/arm/mm/proc-arm925.S >>> index 0bfad62ea858..87c695703580 100644 >>> --- a/arch/arm/mm/proc-arm925.S >>> +++ b/arch/arm/mm/proc-arm925.S >>> @@ -441,7 +441,6 @@ __arm925_setup: >>> >>> #ifdef CONFIG_CPU_DCACHE_WRITETHROUGH >>> mov r0, #4 @ disable write-back >>> on caches explicitly >>> - mcr p15, 7, r0, c15, c0, 0 >>> #endif >> >> it does not have CONFIG_CPU_DCACHE_WRITETHROUGH enabled. > > Maybe it was disabled explicitly for the sx1_defconfig because of this > bug. I would think that this is required for actual sx1 hardware because the > option is default-enabled for ARM925T, and that CPU core is exclusively > used in OMAP15xx. > That looks like a bug in qemu. ARM925T instruction support is limited to V4T instructions. qemu doesn't have explicit 5T support. It is either V4T or V5. Guenter ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/ From mboxrd@z Thu Jan 1 00:00:00 1970 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 4BD90C433F5 for ; Sun, 24 Apr 2022 15:31:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Content-Type: Content-Transfer-Encoding:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:Subject:From:References:Cc:To: MIME-Version:Date:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=RhjOer8FV7IiBNVWwwukefxr8teOjZ3Fv8wjE/J8NaY=; b=3tJBXfh2mDURtD NL9TfTrnwnyZ5bbfWiKlEIzLKqF9elQTQ6y0nRzwRW96ygWf49siIotyx5IK4lc0nPgpg7ehoV7nF 4VY7woV0RhCFCPH9tizh5qjXR8TlhXfeoXAtAYp8Fgahp9nRLo3dm9ca05pdLrrQg7nmzPOkviqul F/eyPxkYdVsF/z0ciojnB8UbRqbW46vcngEHC5nZT9+icYePR79D8hcsDMorIdVaKfyhDDwwgSpO9 d6aJCSvLit6pdz9KwDH04XrNE+GPrh4xmbAXKZRmlm9bBsSLwtCXuqAso4j1qohK8bS96XWSMUICx bFKVcTEaUksTfGWHc5Sw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nieBf-006ppB-0I; Sun, 24 Apr 2022 15:30:11 +0000 Received: from mail-oi1-x229.google.com ([2607:f8b0:4864:20::229]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nie9x-006pDn-Kt; Sun, 24 Apr 2022 15:28:29 +0000 Received: by mail-oi1-x229.google.com with SMTP id l203so3700250oif.0; Sun, 24 Apr 2022 08:28:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=sender:message-id:date:mime-version:user-agent:content-language:to :cc:references:from:subject:in-reply-to:content-transfer-encoding; bh=yr0/AkbMMu8pn1dkU35YlQmF7na7yjrNnK/horRQvq8=; b=YTsJBncPwlsdJoy0clMDPkRYsap010NbelrrDwP4gT2p8VkAeOwyCadOMVg4EkLC3g BU6v4rcHRP7TcChruJdux/6WqtJmUToOWUlOimc0ldD0p/STL+v6YSxQqTz/SiEj3JGk 6SfYzDXOC60C+Zk6YtFsjMz2c7gYsvaefbEF/eKAM03STJHCFm25OuC/Z0YH/2cfNqkA U538FM4O480tv4oZ6rwPTTcYDvIV4RyyrEvA6n7gY5KKJPB4B+s22HrjImpN8j9osv2G SEdJ9k63zxNOgRDgM+KmfcxMquHhbq8CJJjUKerT4sEDujG7ogRPrwOnyNIjdLCE9lFh BU0Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:sender:message-id:date:mime-version:user-agent :content-language:to:cc:references:from:subject:in-reply-to :content-transfer-encoding; bh=yr0/AkbMMu8pn1dkU35YlQmF7na7yjrNnK/horRQvq8=; b=GFMZEKhblxFuOxvbMuBjIQ7rdzRX/0WOmHOubLvApD4N1D4X8HytGLj7P2XsZnceRx xYhUw9+RbK/thFCdR2mfIKKPsrDVhEWiZBXbC527ChENPKQKHt8HBac7+aaduy5ybbLe JTeU0YFoiJdfy+wneKiaKhL5uaKv17soIqKPh2i+a0VuN6dX8DRi+cDxW1ynIAatw/6M 4OTnmTlc5EGlLaO5e2PHW3EJJwr/3pDL0PVcbR23YLhcIZ0gC2ilXgOgUWisSsx4PuJ8 MI1aOtrKXQ5FtrZhUqb33t/cvHZiDKA3J5C9i8x8QI3n2eV+R3iw5C1bU5toIwexHbl7 D5BQ== X-Gm-Message-State: AOAM532xzhXILjEgCnDvY7ywgM2WsBGXtWLXGLsU+Iq4+AKF2kVka9yD knX1fQrRfrvOoBHOE+5gskIeUR8UmoY= X-Google-Smtp-Source: ABdhPJy+gDyQI+jYYZai2x5URiEV01l+fMZDWT8YjU8/GgIriEk0FB5ZVdkvpb6NfVQx+IMk0aUfQA== X-Received: by 2002:aca:f286:0:b0:2da:58ba:c578 with SMTP id q128-20020acaf286000000b002da58bac578mr6576017oih.127.1650814104777; Sun, 24 Apr 2022 08:28:24 -0700 (PDT) Received: from ?IPV6:2600:1700:e321:62f0:329c:23ff:fee3:9d7c? ([2600:1700:e321:62f0:329c:23ff:fee3:9d7c]) by smtp.gmail.com with ESMTPSA id w8-20020a056830410800b00605b48122eesm53063ott.14.2022.04.24.08.28.20 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 24 Apr 2022 08:28:23 -0700 (PDT) Message-ID: <3df135a2-17f5-d6c6-b4a8-e1a60e254297@roeck-us.net> Date: Sun, 24 Apr 2022 08:28:19 -0700 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.7.0 Content-Language: en-US To: Arnd Bergmann Cc: Robert Jarzmik , Linux ARM , Arnd Bergmann , Daniel Mack , Haojian Zhuang , Marek Vasut , Philipp Zabel , Lubomir Rintel , Paul Parsons , Tomas Cech , Sergey Lapin , Thomas Bogendoerfer , Michael Turquette , Stephen Boyd , "Rafael J. Wysocki" , Viresh Kumar , Dmitry Torokhov , Ulf Hansson , Dominik Brodowski , Helge Deller , Mark Brown , Linus Walleij , Linux Kernel Mailing List , "open list:BROADCOM NVRAM DRIVER" , IDE-ML , linux-clk , Linux PM list , "open list:HID CORE LAYER" , patches@opensource.cirrus.com, linux-leds@vger.kernel.org, linux-mmc , linux-mtd , linux-rtc@vger.kernel.org, USB list , Linux Fbdev development list , dri-devel , ALSA Development Mailing List References: <20220419163810.2118169-1-arnd@kernel.org> <20220422170530.GA2338209@roeck-us.net> <8b36d3a4-ec85-2f9f-e4b7-734d8ddd3d8f@roeck-us.net> <20220422234150.GA3442771@roeck-us.net> <3b4046ed-fd75-13ea-fac3-06469172806c@roeck-us.net> From: Guenter Roeck Subject: Re: [PATCH v2 00/48] ARM: PXA multiplatform support In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220424_082825_769512_ACBCE073 X-CRM114-Status: GOOD ( 29.95 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 4/24/22 01:52, Arnd Bergmann wrote: > On Sun, Apr 24, 2022 at 4:09 AM Guenter Roeck wrote: >> On 4/23/22 12:55, Arnd Bergmann wrote: >>> On Sat, Apr 23, 2022 at 1:41 AM Guenter Roeck wrote: >>>> On Sat, Apr 23, 2022 at 12:04:31AM +0200, Arnd Bergmann wrote: >>> >>> Odd, I can't reproduce this at all. Do you get any console output at >>> all for this? >>> >>> Is this the plain omap1_defconfig, or something else? >>> >> >> No, it is my own sx1 specific configuration. >> >> https://github.com/groeck/linux-build-test/blob/master/rootfs/arm/qemu_sx1_defconfig >> >> I don't recall where I got it from but ... > > Ok, that explains it, thanks! > > I fixed all the defconfig files that come with the kernel, but for your own > ones you have to add > > # CONFIG_ARCH_MULTI_V7 is not set > > into the defconfig file, otherwise the multiplatform target defaults to > an ARMv7 instead of ARMv5 build. For an OMAP15xx as in the SX1, > you also need to enable CONFIG_ARCH_MULTI_V4T. > > This is slightly unfortunate, but I don't see any way to avoid it, and the > modified defconfig will still work fine with older kernel trees. > Yes, that works. I changed it in my configuration. >>> One thing I keep having to apply myself is this snippet: >>> >>> diff --git a/arch/arm/mm/proc-arm925.S b/arch/arm/mm/proc-arm925.S >>> index 0bfad62ea858..87c695703580 100644 >>> --- a/arch/arm/mm/proc-arm925.S >>> +++ b/arch/arm/mm/proc-arm925.S >>> @@ -441,7 +441,6 @@ __arm925_setup: >>> >>> #ifdef CONFIG_CPU_DCACHE_WRITETHROUGH >>> mov r0, #4 @ disable write-back >>> on caches explicitly >>> - mcr p15, 7, r0, c15, c0, 0 >>> #endif >> >> it does not have CONFIG_CPU_DCACHE_WRITETHROUGH enabled. > > Maybe it was disabled explicitly for the sx1_defconfig because of this > bug. I would think that this is required for actual sx1 hardware because the > option is default-enabled for ARM925T, and that CPU core is exclusively > used in OMAP15xx. > That looks like a bug in qemu. ARM925T instruction support is limited to V4T instructions. qemu doesn't have explicit 5T support. It is either V4T or V5. Guenter _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel From mboxrd@z Thu Jan 1 00:00:00 1970 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 52659C433EF for ; Sun, 24 Apr 2022 15:35:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232319AbiDXPiN (ORCPT ); Sun, 24 Apr 2022 11:38:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37174 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240462AbiDXPb1 (ORCPT ); Sun, 24 Apr 2022 11:31:27 -0400 Received: from mail-oi1-x22a.google.com (mail-oi1-x22a.google.com [IPv6:2607:f8b0:4864:20::22a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 98985171C04; Sun, 24 Apr 2022 08:28:25 -0700 (PDT) Received: by mail-oi1-x22a.google.com with SMTP id e4so14578216oif.2; Sun, 24 Apr 2022 08:28:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=sender:message-id:date:mime-version:user-agent:content-language:to :cc:references:from:subject:in-reply-to:content-transfer-encoding; bh=yr0/AkbMMu8pn1dkU35YlQmF7na7yjrNnK/horRQvq8=; b=YTsJBncPwlsdJoy0clMDPkRYsap010NbelrrDwP4gT2p8VkAeOwyCadOMVg4EkLC3g BU6v4rcHRP7TcChruJdux/6WqtJmUToOWUlOimc0ldD0p/STL+v6YSxQqTz/SiEj3JGk 6SfYzDXOC60C+Zk6YtFsjMz2c7gYsvaefbEF/eKAM03STJHCFm25OuC/Z0YH/2cfNqkA U538FM4O480tv4oZ6rwPTTcYDvIV4RyyrEvA6n7gY5KKJPB4B+s22HrjImpN8j9osv2G SEdJ9k63zxNOgRDgM+KmfcxMquHhbq8CJJjUKerT4sEDujG7ogRPrwOnyNIjdLCE9lFh BU0Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:sender:message-id:date:mime-version:user-agent :content-language:to:cc:references:from:subject:in-reply-to :content-transfer-encoding; bh=yr0/AkbMMu8pn1dkU35YlQmF7na7yjrNnK/horRQvq8=; b=6vnD+8dQFmxyCIkjIp2rzinoLopet/bOToKxMnl2YtHOByGo/3uzEEWghB5ivZYWCi +rlylgSvpddSCP7L/jowhR+EY8PKx8gmUpaAklTLvOnGzBu+KsO0K5sZma/VxYfD+8O7 cY1obNpFAKSpXcqX/vynqo70JQqRpH2fX6OJ/az/sdloBzVT1Hlbsy0t+ISTk9eja4i2 NPP0370RoYz/QRrb9fuISYcH3nGQX0swBEPrmTAqQY3CW47NEd9aiH8cBNciV3kMxAg/ 0HhL+B10ELgesmaEYtrPaSpDfQrPLH0USQ0+qkRh8SEWZ8FsnZoU4Bz5k5H7i2AYbXQ+ GfoA== X-Gm-Message-State: AOAM533aS0heWnGx1qtXYFFuC/rH9r8ilEPuKVhXK6t5ZIQox5cSnKAm JAmIERVQLb6nkLj0Rfc7TIQ= X-Google-Smtp-Source: ABdhPJy+gDyQI+jYYZai2x5URiEV01l+fMZDWT8YjU8/GgIriEk0FB5ZVdkvpb6NfVQx+IMk0aUfQA== X-Received: by 2002:aca:f286:0:b0:2da:58ba:c578 with SMTP id q128-20020acaf286000000b002da58bac578mr6576017oih.127.1650814104777; Sun, 24 Apr 2022 08:28:24 -0700 (PDT) Received: from ?IPV6:2600:1700:e321:62f0:329c:23ff:fee3:9d7c? ([2600:1700:e321:62f0:329c:23ff:fee3:9d7c]) by smtp.gmail.com with ESMTPSA id w8-20020a056830410800b00605b48122eesm53063ott.14.2022.04.24.08.28.20 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 24 Apr 2022 08:28:23 -0700 (PDT) Sender: Guenter Roeck Message-ID: <3df135a2-17f5-d6c6-b4a8-e1a60e254297@roeck-us.net> Date: Sun, 24 Apr 2022 08:28:19 -0700 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.7.0 Content-Language: en-US To: Arnd Bergmann Cc: Robert Jarzmik , Linux ARM , Arnd Bergmann , Daniel Mack , Haojian Zhuang , Marek Vasut , Philipp Zabel , Lubomir Rintel , Paul Parsons , Tomas Cech , Sergey Lapin , Thomas Bogendoerfer , Michael Turquette , Stephen Boyd , "Rafael J. Wysocki" , Viresh Kumar , Dmitry Torokhov , Ulf Hansson , Dominik Brodowski , Helge Deller , Mark Brown , Linus Walleij , Linux Kernel Mailing List , "open list:BROADCOM NVRAM DRIVER" , IDE-ML , linux-clk , Linux PM list , "open list:HID CORE LAYER" , patches@opensource.cirrus.com, linux-leds@vger.kernel.org, linux-mmc , linux-mtd , linux-rtc@vger.kernel.org, USB list , Linux Fbdev development list , dri-devel , ALSA Development Mailing List References: <20220419163810.2118169-1-arnd@kernel.org> <20220422170530.GA2338209@roeck-us.net> <8b36d3a4-ec85-2f9f-e4b7-734d8ddd3d8f@roeck-us.net> <20220422234150.GA3442771@roeck-us.net> <3b4046ed-fd75-13ea-fac3-06469172806c@roeck-us.net> From: Guenter Roeck Subject: Re: [PATCH v2 00/48] ARM: PXA multiplatform support In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-leds@vger.kernel.org On 4/24/22 01:52, Arnd Bergmann wrote: > On Sun, Apr 24, 2022 at 4:09 AM Guenter Roeck wrote: >> On 4/23/22 12:55, Arnd Bergmann wrote: >>> On Sat, Apr 23, 2022 at 1:41 AM Guenter Roeck wrote: >>>> On Sat, Apr 23, 2022 at 12:04:31AM +0200, Arnd Bergmann wrote: >>> >>> Odd, I can't reproduce this at all. Do you get any console output at >>> all for this? >>> >>> Is this the plain omap1_defconfig, or something else? >>> >> >> No, it is my own sx1 specific configuration. >> >> https://github.com/groeck/linux-build-test/blob/master/rootfs/arm/qemu_sx1_defconfig >> >> I don't recall where I got it from but ... > > Ok, that explains it, thanks! > > I fixed all the defconfig files that come with the kernel, but for your own > ones you have to add > > # CONFIG_ARCH_MULTI_V7 is not set > > into the defconfig file, otherwise the multiplatform target defaults to > an ARMv7 instead of ARMv5 build. For an OMAP15xx as in the SX1, > you also need to enable CONFIG_ARCH_MULTI_V4T. > > This is slightly unfortunate, but I don't see any way to avoid it, and the > modified defconfig will still work fine with older kernel trees. > Yes, that works. I changed it in my configuration. >>> One thing I keep having to apply myself is this snippet: >>> >>> diff --git a/arch/arm/mm/proc-arm925.S b/arch/arm/mm/proc-arm925.S >>> index 0bfad62ea858..87c695703580 100644 >>> --- a/arch/arm/mm/proc-arm925.S >>> +++ b/arch/arm/mm/proc-arm925.S >>> @@ -441,7 +441,6 @@ __arm925_setup: >>> >>> #ifdef CONFIG_CPU_DCACHE_WRITETHROUGH >>> mov r0, #4 @ disable write-back >>> on caches explicitly >>> - mcr p15, 7, r0, c15, c0, 0 >>> #endif >> >> it does not have CONFIG_CPU_DCACHE_WRITETHROUGH enabled. > > Maybe it was disabled explicitly for the sx1_defconfig because of this > bug. I would think that this is required for actual sx1 hardware because the > option is default-enabled for ARM925T, and that CPU core is exclusively > used in OMAP15xx. > That looks like a bug in qemu. ARM925T instruction support is limited to V4T instructions. qemu doesn't have explicit 5T support. It is either V4T or V5. 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([2600:1700:e321:62f0:329c:23ff:fee3:9d7c]) by smtp.gmail.com with ESMTPSA id w8-20020a056830410800b00605b48122eesm53063ott.14.2022.04.24.08.28.20 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 24 Apr 2022 08:28:23 -0700 (PDT) Message-ID: <3df135a2-17f5-d6c6-b4a8-e1a60e254297@roeck-us.net> Date: Sun, 24 Apr 2022 08:28:19 -0700 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.7.0 Content-Language: en-US To: Arnd Bergmann References: <20220419163810.2118169-1-arnd@kernel.org> <20220422170530.GA2338209@roeck-us.net> <8b36d3a4-ec85-2f9f-e4b7-734d8ddd3d8f@roeck-us.net> <20220422234150.GA3442771@roeck-us.net> <3b4046ed-fd75-13ea-fac3-06469172806c@roeck-us.net> From: Guenter Roeck Subject: Re: [PATCH v2 00/48] ARM: PXA multiplatform support In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Mailman-Approved-At: Mon, 25 Apr 2022 15:27:44 +0200 Cc: Ulf Hansson , USB list , Philipp Zabel , "Rafael J. Wysocki" , Viresh Kumar , Sergey Lapin , Linux Fbdev development list , Dominik Brodowski , "open list:BROADCOM NVRAM DRIVER" , IDE-ML , linux-mtd , Tomas Cech , Robert Jarzmik , linux-clk , linux-leds@vger.kernel.org, linux-rtc@vger.kernel.org, Linus Walleij , Helge Deller , Marek Vasut , Paul Parsons , Michael Turquette , Arnd Bergmann , Linux PM list , "open list:HID CORE LAYER" , Haojian Zhuang , Lubomir Rintel , Mark Brown , dri-devel , Linux ARM , Thomas Bogendoerfer , Stephen Boyd , patches@opensource.cirrus.com, Dmitry Torokhov , linux-mmc , Linux Kernel Mailing List , ALSA Development Mailing List , Daniel Mack X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" On 4/24/22 01:52, Arnd Bergmann wrote: > On Sun, Apr 24, 2022 at 4:09 AM Guenter Roeck wrote: >> On 4/23/22 12:55, Arnd Bergmann wrote: >>> On Sat, Apr 23, 2022 at 1:41 AM Guenter Roeck wrote: >>>> On Sat, Apr 23, 2022 at 12:04:31AM +0200, Arnd Bergmann wrote: >>> >>> Odd, I can't reproduce this at all. Do you get any console output at >>> all for this? >>> >>> Is this the plain omap1_defconfig, or something else? >>> >> >> No, it is my own sx1 specific configuration. >> >> https://github.com/groeck/linux-build-test/blob/master/rootfs/arm/qemu_sx1_defconfig >> >> I don't recall where I got it from but ... > > Ok, that explains it, thanks! > > I fixed all the defconfig files that come with the kernel, but for your own > ones you have to add > > # CONFIG_ARCH_MULTI_V7 is not set > > into the defconfig file, otherwise the multiplatform target defaults to > an ARMv7 instead of ARMv5 build. For an OMAP15xx as in the SX1, > you also need to enable CONFIG_ARCH_MULTI_V4T. > > This is slightly unfortunate, but I don't see any way to avoid it, and the > modified defconfig will still work fine with older kernel trees. > Yes, that works. I changed it in my configuration. >>> One thing I keep having to apply myself is this snippet: >>> >>> diff --git a/arch/arm/mm/proc-arm925.S b/arch/arm/mm/proc-arm925.S >>> index 0bfad62ea858..87c695703580 100644 >>> --- a/arch/arm/mm/proc-arm925.S >>> +++ b/arch/arm/mm/proc-arm925.S >>> @@ -441,7 +441,6 @@ __arm925_setup: >>> >>> #ifdef CONFIG_CPU_DCACHE_WRITETHROUGH >>> mov r0, #4 @ disable write-back >>> on caches explicitly >>> - mcr p15, 7, r0, c15, c0, 0 >>> #endif >> >> it does not have CONFIG_CPU_DCACHE_WRITETHROUGH enabled. > > Maybe it was disabled explicitly for the sx1_defconfig because of this > bug. I would think that this is required for actual sx1 hardware because the > option is default-enabled for ARM925T, and that CPU core is exclusively > used in OMAP15xx. > That looks like a bug in qemu. ARM925T instruction support is limited to V4T instructions. qemu doesn't have explicit 5T support. It is either V4T or V5. Guenter