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 X-Spam-Level: X-Spam-Status: No, score=-2.1 required=3.0 tests=DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED,DKIM_VALID,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DCF2BC2D0C2 for ; Mon, 30 Dec 2019 11:54:10 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id AFE3A206DB for ; Mon, 30 Dec 2019 11:54:10 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="jdfCO5x0"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="P7B7HhtF" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org AFE3A206DB Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Subject:To:From :Date:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=DKilk0B6mh5qdFAjY+7jwYvMMTR4x97fg0Fbob03YeI=; b=jdfCO5x0jRpY0+ sqpJvD4jv2WE54oT9svIa6asmUEDPEJt/fjXlFcQW0/80241rfMY3Swvdg6T3t54U5CbXYZazvJ8J kU9HtUaenE1Zu8K7fiFq6h7rFnex45/lqZfBp0sq7UQHWYhevdbn7p8dhELoiK0GW9O1aJ7Abca9d uxgV+HAtG0l3mCijRnv8QpMYGKVCcrvrOTRru6lal0vivuaTfm3CEvAGyIPjNU4nWSlrlTOryJbNb COiIWu9JbWgqa/XdSQFxvrmJYYahw6Sf+Bd2Md5gOV/0U9mwEmuw3uJMeMusTRaOF+xBAUUPEFPEl iGyv8sFNewUkRgLBpncg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iltcf-0002qx-Fe; Mon, 30 Dec 2019 11:54:09 +0000 Received: from mail-pl1-x641.google.com ([2607:f8b0:4864:20::641]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1iltcb-0002qE-Qy for linux-arm-kernel@lists.infradead.org; Mon, 30 Dec 2019 11:54:07 +0000 Received: by mail-pl1-x641.google.com with SMTP id x17so14545919pln.1 for ; Mon, 30 Dec 2019 03:54:05 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:mime-version:content-disposition :user-agent; bh=mwGLfXIphyD7phRk7lEEjBgr1Dix57gKwz3I4i+jkF4=; b=P7B7HhtFgmHeFrNyqTqrTnThBQZxfb2GNCMQ/4ecLOVc7DPk2eoU1YfvZswojacSrV fWPs9OfIIBvQQS7U0U4kmbgZTZgP6d77qKfTp49ZdPBfrR5YO+2BG74SAAs0WcXtr4UL Sk8rLSqK990JPTr3Z6lIjJMaUvIz9E9pIj7yglsUQkqJesp7Qs4pbgR0hMwWzoZXb+Px 0ffDqa3uzayU8RSvVxzpbgqZ9t6Lo6xs3BX2kpzLvBk4VmIVJoVoMWjeK6Wm8eNnN0uY AB6lUvk30xg+QfKpD4KcHmF59E2ZCDwkGXt5GWlLC3PzgFNNvuRFrtXZ2pLhm0DfkoTK v3mA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:mime-version :content-disposition:user-agent; bh=mwGLfXIphyD7phRk7lEEjBgr1Dix57gKwz3I4i+jkF4=; b=Ru2IHPtGzmxg5mf5aN0CYZgaz11Gcy2G2feRyqilRZ9FqeZnUnNX8iqz5mfF8mDYr8 kW3dgHhfwBacGKaBle0z7O29ytAIOkzR+DFuR8IKLizHWdkwzkuWGIKfdzDgvU1Tbh+J hL6Pw/NOXw56GaARF0P//lm6IBSt0b7Fv/33EfTA/yhPV3NjtTeyXh42s3SlLERl6sBc GTTmDNhVnD8a/8NVNbHTm7SuwAg/HGrq4ZqJHeBqpk3PEtGsbdye6a6X6IAHpl3ogxYK AxALX4Mbg3y/Xdnb7QXXU+JpF+gtqb3r6QAGspC9zKrR0LLRJsL1J2JETa9kwSUy/0mE nQdA== X-Gm-Message-State: APjAAAUcNpT6gp/GJRWKd3rTnjufuTKHZBCbjXdlRWdjrIjwgT6LAqiY VfR6lKMfCGExVTv2DfnUxF0cuxO6 X-Google-Smtp-Source: APXvYqxdH1nCcHK5bh5D+i4nvE9uZw4uLavnwDMLXtIoPWroXM53f2kWPGymJ5AnGjNQ55B6UlsC2g== X-Received: by 2002:a17:902:74c5:: with SMTP id f5mr65114786plt.229.1577706844772; Mon, 30 Dec 2019 03:54:04 -0800 (PST) Received: from localhost ([49.207.54.121]) by smtp.gmail.com with ESMTPSA id t23sm53866525pfq.106.2019.12.30.03.54.04 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Mon, 30 Dec 2019 03:54:04 -0800 (PST) Date: Mon, 30 Dec 2019 17:24:02 +0530 From: afzal mohammed To: Russell King Subject: [RFC PATCH 0/2] ARM: !MMU v7 Cortex-M preemption support Message-ID: MIME-Version: 1.0 Content-Disposition: inline User-Agent: Mutt/1.9.3 (2018-01-21) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191230_035406_065095_003F4084 X-CRM114-Status: GOOD ( 12.74 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Vladimir Murzin , Catalin Marinas , linux-kernel@vger.kernel.org, Uwe =?iso-8859-1?Q?Kleine-K=F6nig?= , Greg Ungerer , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi, [ cc'ing those who added long back !MMU support & Cortex-M support as well, though some not working anymore on these ] An attempt to add preemption support to the !MMU, ARM Cortex-M platform. With these changes, there is some effect, but not enough to make it usable. Though as of now i don't have much clue on what the issue could be, it is being debugged. Meanwhile sending the series as RFC, to get feedback on what could be missing or whether there is anything inherent in !MMU and/or Cortex-M platforms that could prevent supporting preemption, etc. Details on the problems, the way it was tested etc. are mentioned in 2/2. 1/2 is just a change made so as to have a clear diff for easy review of the preemption support changes. Regards afzal afzal mohammed (2): ARM: !MMU: v7-M: prepare preemption support ARM: !MMU: v7-M: preemption support arch/arm/kernel/entry-v7m.S | 22 +++++++++++++++++++--- 1 file changed, 19 insertions(+), 3 deletions(-) base-commit: fd6988496e79a6a4bdb514a4655d2920209eb85d -- 2.24.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel