From patchwork Mon Dec 3 17:52:39 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Will Deacon X-Patchwork-Id: 1834621 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by patchwork2.kernel.org (Postfix) with ESMTP id 553CFDF2F9 for ; Mon, 3 Dec 2012 17:55:35 +0000 (UTC) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1TfaCL-0001Is-PV; Mon, 03 Dec 2012 17:52:53 +0000 Received: from cam-admin0.cambridge.arm.com ([217.140.96.50]) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1TfaCH-0001IY-5E for linux-arm-kernel@lists.infradead.org; Mon, 03 Dec 2012 17:52:50 +0000 Received: from mudshark.cambridge.arm.com (mudshark.cambridge.arm.com [10.1.79.58]) by cam-admin0.cambridge.arm.com (8.12.6/8.12.6) with ESMTP id qB3Hqh53002347; Mon, 3 Dec 2012 17:52:43 GMT Received: by mudshark.cambridge.arm.com (Postfix, from userid 1000) id 45D2BC0336; Mon, 3 Dec 2012 17:52:42 +0000 (GMT) From: Will Deacon To: linux-arm-kernel@lists.infradead.org Subject: [RFC PATCH 1/2] ARM: Dummy Virtual Machine platform support Date: Mon, 3 Dec 2012 17:52:39 +0000 Message-Id: <1354557160-20144-2-git-send-email-will.deacon@arm.com> X-Mailer: git-send-email 1.8.0 In-Reply-To: <1354557160-20144-1-git-send-email-will.deacon@arm.com> References: <1354557160-20144-1-git-send-email-will.deacon@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20121203_125249_456519_762DD0FF X-CRM114-Status: GOOD ( 17.96 ) X-Spam-Score: -7.6 (-------) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-7.6 points) pts rule name description ---- ---------------------- -------------------------------------------------- -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at http://www.dnswl.org/, high trust [217.140.96.50 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record -0.7 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: marc.zyngier@arm.com, xen-arm@lists.xen.org, mark.rutland@arm.com, Will Deacon , arnd@arnd.de X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org From: Marc Zyngier Add support for the smallest, dumbest possible platform, to be used as a guest for KVM or other hypervisors. It only mandates a GIC and architected timers. Fits nicely with a multiplatform zImage. Uses very little silicon area. Signed-off-by: Marc Zyngier Signed-off-by: Will Deacon --- arch/arm/Kconfig | 2 ++ arch/arm/Makefile | 1 + arch/arm/mach-virt/Kconfig | 9 +++++++ arch/arm/mach-virt/Makefile | 5 ++++ arch/arm/mach-virt/virt.c | 65 +++++++++++++++++++++++++++++++++++++++++++++ 5 files changed, 82 insertions(+) create mode 100644 arch/arm/mach-virt/Kconfig create mode 100644 arch/arm/mach-virt/Makefile create mode 100644 arch/arm/mach-virt/virt.c diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 781725e..ba0dca7 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -1126,6 +1126,8 @@ source "arch/arm/mach-versatile/Kconfig" source "arch/arm/mach-vexpress/Kconfig" source "arch/arm/plat-versatile/Kconfig" +source "arch/arm/mach-virt/Kconfig" + source "arch/arm/mach-w90x900/Kconfig" # Definitions to make life easier diff --git a/arch/arm/Makefile b/arch/arm/Makefile index 5f914fc..e8232ad 100644 --- a/arch/arm/Makefile +++ b/arch/arm/Makefile @@ -192,6 +192,7 @@ machine-$(CONFIG_ARCH_SOCFPGA) += socfpga machine-$(CONFIG_ARCH_SPEAR13XX) += spear13xx machine-$(CONFIG_ARCH_SPEAR3XX) += spear3xx machine-$(CONFIG_MACH_SPEAR600) += spear6xx +machine-$(CONFIG_ARCH_VIRT) += virt machine-$(CONFIG_ARCH_ZYNQ) += zynq # Platform directory name. This list is sorted alphanumerically diff --git a/arch/arm/mach-virt/Kconfig b/arch/arm/mach-virt/Kconfig new file mode 100644 index 0000000..a568a2a --- /dev/null +++ b/arch/arm/mach-virt/Kconfig @@ -0,0 +1,9 @@ +config ARCH_VIRT + bool "Dummy Virtual Machine" if ARCH_MULTI_V7 + select ARCH_WANT_OPTIONAL_GPIOLIB + select ARM_GIC + select ARM_ARCH_TIMER + select HAVE_SMP + select CPU_V7 + select SPARSE_IRQ + select USE_OF diff --git a/arch/arm/mach-virt/Makefile b/arch/arm/mach-virt/Makefile new file mode 100644 index 0000000..7ddbfa6 --- /dev/null +++ b/arch/arm/mach-virt/Makefile @@ -0,0 +1,5 @@ +# +# Makefile for the linux kernel. +# + +obj-y := virt.o diff --git a/arch/arm/mach-virt/virt.c b/arch/arm/mach-virt/virt.c new file mode 100644 index 0000000..174b9da --- /dev/null +++ b/arch/arm/mach-virt/virt.c @@ -0,0 +1,65 @@ +/* + * Dummy Virtual Machine - does what it says on the tin. + * + * Copyright (C) 2012 ARM Ltd + * Authors: Will Deacon , + * Marc Zyngier + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#include +#include + +#include +#include +#include +#include + +const static struct of_device_id irq_match[] = { + { .compatible = "arm,cortex-a15-gic", .data = gic_of_init, }, + {} +}; + +static void __init gic_init_irq(void) +{ + of_irq_init(irq_match); +} + +static void __init virt_init(void) +{ + of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); +} + +static void __init virt_timer_init(void) +{ + WARN_ON(arch_timer_of_register() != 0); + WARN_ON(arch_timer_sched_clock_init() != 0); +} + +static const char *virt_dt_match[] = { + "linux,dummy-virt", + NULL +}; + +static struct sys_timer virt_timer = { + .init = virt_timer_init, +}; + +DT_MACHINE_START(VIRT, "Dummy Virtual Machine") + .init_irq = gic_init_irq, + .handle_irq = gic_handle_irq, + .timer = &virt_timer, + .init_machine = virt_init, + .dt_compat = virt_dt_match, +MACHINE_END