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=-9.7 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 C09C9C04EBF for ; Tue, 4 Dec 2018 14:11:03 +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 92DCB2081B for ; Tue, 4 Dec 2018 14:11:03 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="UTPnm/gd"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=brainfault-org.20150623.gappssmtp.com header.i=@brainfault-org.20150623.gappssmtp.com header.b="bzkGSdoH" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 92DCB2081B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=brainfault.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-riscv-bounces+infradead-linux-riscv=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:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Message-Id:Date: Subject:To:From: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=W3pfOCLMWWVuvisPB6iofr3qNfrJPRL+fOhQpRKkRn0=; b=UTP nm/gdpkZooJsC6AX2FPtd7iLx1IuRXVppDEFtc9xjrVIxRlpRMyk3mND+DEdnqrWW3n+4wKl2HVu/ wBdGnhYGlCVEWlPpbIHYEFt5SkXugH5aApouuuWXrAqxa3mdNuRpQvuaUBN2LvayIDAcy8VvcMwFw Jx7Kak4oAsU/E7zKb9/kmpHDc0yLs6u9BY4h2zBFbDxOFzTWxYhsFbnf7PhRTtEqD6NPinV874F3U gWX7ybO/4sGmu1bxvP0r0bQxw20xEA08yPoHJ1rYt4QK8sK+V9uZtHdKb49X5AuZFRE8qQeJ7v3hn 7I16Vk/FgYbEszshdQtWxT8ZlUMVvfw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gUBPi-0006zn-W8; Tue, 04 Dec 2018 14:11:03 +0000 Received: from mail-pf1-x442.google.com ([2607:f8b0:4864:20::442]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gUBPf-0006y5-LR for linux-riscv@lists.infradead.org; Tue, 04 Dec 2018 14:11:01 +0000 Received: by mail-pf1-x442.google.com with SMTP id 64so8261712pfr.9 for ; Tue, 04 Dec 2018 06:10:48 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=brainfault-org.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id; bh=OgI1Biz216dTM0OsrwyzMGJvKRXra4cITiLXHfMziwU=; b=bzkGSdoHurfqVV+cCDhQg/vyockM4Lxh2yBA8Rqhpm5PNqHggJwGmJB5uasnUHOsi+ e/5NO+FBaKF/a9WjmI2wNqB+fBeclgQ5U8cmT1wqfsj2L/OvseftewzLw6xQaUHoTGWu mQ/1SBJtm/nGr766Ar0USHwioVdaR0tD6Kwb9T6OhesCXiiKaBs4CWX8M88Ru/eRQP5w rgltm6aOdBD+Kw/wGZLCleeCqZcxSna37TR10lx3MQlEAqzNTYVeq2YTlIr69IH8r6T1 yzUCxnf1tHzLVAeDbBcS20I0y3KQwQV5F4q/xAkUiGoVGYtDvUqZYwN+viwC/2ctgRcN QwKA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=OgI1Biz216dTM0OsrwyzMGJvKRXra4cITiLXHfMziwU=; b=SgfPiBJLFJCQA/qh5Y2N++t8d8Je+9F+yElDNzda1ihPRSLEpuyQMEJ8KBQA8zXnZO MnlgwppzfOuwMjakKL2rlsz/0WYz/W/Ks3JYkW1Wbxs7xT803dUFXHcFUZI1UBTqM7wm BH/3nSLeWaF4Lx+HvoUnxqeGJ2NFy9oGTjX9ltT0OlnnPzVbyVuzdQOU8ZEXberoR882 Ui5vQP3g2vmcQomI+KUfqrV6Q8/JYF/NvhXLJLY5CwdNvyZfAWv8lHvbqIBPlg3DtIDT HVZ5/xFm26ZzWnU+FvKlmwD/sZiPss7+irtA+V3GC2fztBFUWKqC8vN98DEinGkfidTh usjw== X-Gm-Message-State: AA+aEWaBhdxPcBKvYDT2TTo5mxn4D8gwIKcmTAkjFFF7Y/fiUlFOcqJz R3FMWxc3uPmcKU+b1VmGxwGO2g== X-Google-Smtp-Source: AFSGD/VOE0dTE1stKeXyqSc9tQDatJthKkd9vkpV86uxpqbSW8qOAgrhfs8dKJl+f+D4pqMxQT5uXA== X-Received: by 2002:a63:4706:: with SMTP id u6mr15984635pga.95.1543932647480; Tue, 04 Dec 2018 06:10:47 -0800 (PST) Received: from anup-ubuntu64.qualcomm.com ([49.207.53.58]) by smtp.googlemail.com with ESMTPSA id k129sm31298884pgk.29.2018.12.04.06.10.43 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 04 Dec 2018 06:10:46 -0800 (PST) From: Anup Patel To: Greg Kroah-Hartman , Jiri Slaby , Palmer Dabbelt , Albert Ou Subject: [PATCH 0/3] RISC-V SBI earlycon Date: Tue, 4 Dec 2018 19:25:04 +0530 Message-Id: <20181204135507.3706-1-anup@brainfault.org> X-Mailer: git-send-email 2.17.1 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20181204_061059_704122_5A10BC9C X-CRM114-Status: GOOD ( 10.69 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Rob Herring , Anup Patel , linux-kernel@vger.kernel.org, Christoph Hellwig , Atish Patra , linux-serial@vger.kernel.org, linux-riscv@lists.infradead.org MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+infradead-linux-riscv=archiver.kernel.org@lists.infradead.org This patchset adds RISC-V SBI earlycon and removes RISC-V EARLY_PRINTK. We should use earlycon over existing EARLY_PRINTK for SBI console because: 1. It's a more generic way of implementing early console for debugging 2. Current RISC-V EARLY_PRINTK is a compile-time option whereas earlycon is enabled at run-time via kernel parameters. 3. To use earlycon with SBI, we have to pass "earlycon=sbi" in kernel parameters. If earlycon kernel parameter is not provided then kernel boots much faster which is very useful in real-world RISC-V deployments. The patchset is tested on QEMU virt machine. It is based on Linux-4.20-rc5 and can be found at riscv_earlycon_v1 branch of: https://github.com/avpatel/linux.git Anup Patel (3): tty/serial: Add RISC-V SBI earlycon support RISC-V: defconfig: Enable RISC-V SBI earlycon support RISC-V: Remove EARLY_PRINTK support arch/riscv/Kconfig.debug | 2 -- arch/riscv/configs/defconfig | 1 + arch/riscv/kernel/setup.c | 28 ------------------------- drivers/tty/serial/Kconfig | 12 +++++++++++ drivers/tty/serial/Makefile | 1 + drivers/tty/serial/earlycon-riscv-sbi.c | 28 +++++++++++++++++++++++++ 6 files changed, 42 insertions(+), 30 deletions(-) create mode 100644 drivers/tty/serial/earlycon-riscv-sbi.c -- 2.17.1 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv From mboxrd@z Thu Jan 1 00:00:00 1970 From: Anup Patel Subject: [PATCH 0/3] RISC-V SBI earlycon Date: Tue, 4 Dec 2018 19:25:04 +0530 Message-ID: <20181204135507.3706-1-anup@brainfault.org> Return-path: Sender: linux-kernel-owner@vger.kernel.org To: Greg Kroah-Hartman , Jiri Slaby , Palmer Dabbelt , Albert Ou Cc: Atish Patra , Christoph Hellwig , Rob Herring , linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org, Anup Patel List-Id: linux-serial@vger.kernel.org This patchset adds RISC-V SBI earlycon and removes RISC-V EARLY_PRINTK. We should use earlycon over existing EARLY_PRINTK for SBI console because: 1. It's a more generic way of implementing early console for debugging 2. Current RISC-V EARLY_PRINTK is a compile-time option whereas earlycon is enabled at run-time via kernel parameters. 3. To use earlycon with SBI, we have to pass "earlycon=sbi" in kernel parameters. If earlycon kernel parameter is not provided then kernel boots much faster which is very useful in real-world RISC-V deployments. The patchset is tested on QEMU virt machine. It is based on Linux-4.20-rc5 and can be found at riscv_earlycon_v1 branch of: https://github.com/avpatel/linux.git Anup Patel (3): tty/serial: Add RISC-V SBI earlycon support RISC-V: defconfig: Enable RISC-V SBI earlycon support RISC-V: Remove EARLY_PRINTK support arch/riscv/Kconfig.debug | 2 -- arch/riscv/configs/defconfig | 1 + arch/riscv/kernel/setup.c | 28 ------------------------- drivers/tty/serial/Kconfig | 12 +++++++++++ drivers/tty/serial/Makefile | 1 + drivers/tty/serial/earlycon-riscv-sbi.c | 28 +++++++++++++++++++++++++ 6 files changed, 42 insertions(+), 30 deletions(-) create mode 100644 drivers/tty/serial/earlycon-riscv-sbi.c -- 2.17.1