From patchwork Tue Oct 9 13:03:52 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Lucas Meneghel Rodrigues X-Patchwork-Id: 190294 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id CEB2A2C00D6 for ; Wed, 10 Oct 2012 00:04:21 +1100 (EST) Received: from localhost ([::1]:54398 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TLZTv-0001es-TS for incoming@patchwork.ozlabs.org; Tue, 09 Oct 2012 09:04:19 -0400 Received: from eggs.gnu.org ([208.118.235.92]:42379) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TLZTj-0001e7-HI for qemu-devel@nongnu.org; Tue, 09 Oct 2012 09:04:13 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TLZTe-0003rO-JZ for qemu-devel@nongnu.org; Tue, 09 Oct 2012 09:04:07 -0400 Received: from mx1.redhat.com ([209.132.183.28]:3190) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TLZTe-0003r6-A6 for qemu-devel@nongnu.org; Tue, 09 Oct 2012 09:04:02 -0400 Received: from int-mx01.intmail.prod.int.phx2.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id q99D41T1005060 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Tue, 9 Oct 2012 09:04:01 -0400 Received: from freedom.redhat.com (vpn1-7-249.gru2.redhat.com [10.97.7.249]) by int-mx01.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id q99D3w8L027890; Tue, 9 Oct 2012 09:03:59 -0400 From: Lucas Meneghel Rodrigues To: qemu-devel@nongnu.org Date: Tue, 9 Oct 2012 10:03:52 -0300 Message-Id: <1349787833-8644-2-git-send-email-lmr@redhat.com> In-Reply-To: <1349787833-8644-1-git-send-email-lmr@redhat.com> References: <1349787833-8644-1-git-send-email-lmr@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.67 on 10.5.11.11 X-MIME-Autoconverted: from 8bit to quoted-printable by mx1.redhat.com id q99D41T1005060 X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 209.132.183.28 Cc: jan.kiszka@siemens.com, =?UTF-8?q?Herv=C3=A9=20Poussineau?= Subject: [Qemu-devel] [PATCH 1/2] debugexit: support for custom exit port (LGPL VGA BIOS port 0x501) v2 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org From: Hervé Poussineau Add generic support for simple I/O port which, when written to, cause QEMU to exit with the given written value. There is no vmstate associated with the debugging port, simply because the entire interface is a single, stateless, write-only port. Changes from v1: * Changing PIO from MMIO, as requested during review. Signed-off-by: Hervé Poussineau --- hw/debugexit.c | 75 +++++++++++++++++++++++++++++++++++++++++++++++++++ hw/i386/Makefile.objs | 2 +- 2 files changed, 76 insertions(+), 1 deletion(-) create mode 100644 hw/debugexit.c diff --git a/hw/debugexit.c b/hw/debugexit.c new file mode 100644 index 0000000..fe4608c --- /dev/null +++ b/hw/debugexit.c @@ -0,0 +1,75 @@ +/* + * QEMU debug exit port ("LGPL'ed-VGA-BIOS-style port 501/502") emulation + * + * Copyright (c) 2012 Herve Poussineau + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + * 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 "isa.h" +#include "exec-memory.h" + +typedef struct ISADebugExitState { + ISADevice dev; + uint32_t iobase; + uint8_t access_size; +} ISADebugExitState; + +static void debugexit_ioport_write(void *opaque, uint32_t addr, uint32_t val) +{ + exit((val << 1) | 1); +} + +static int debugexit_isa_initfn(ISADevice *dev) +{ + ISADebugExitState *isa = DO_UPCAST(ISADebugExitState, dev, dev); + + const struct MemoryRegionPortio debugexit_portio_list[] = { + { isa->iobase, 1, isa->access_size, .write = debugexit_ioport_write, }, + PORTIO_END_OF_LIST(), + }; + PortioList *debugexit_port_list = g_new(PortioList, 1); + portio_list_init(debugexit_port_list, debugexit_portio_list, + NULL, "isa-debugexit"); + portio_list_add(debugexit_port_list, get_system_io(), 0x0); + return 0; +} + +static Property debugexit_isa_properties[] = { + DEFINE_PROP_HEX32("iobase", ISADebugExitState, iobase, 0x501), + DEFINE_PROP_UINT8("access-size", ISADebugExitState, access_size, 1), + DEFINE_PROP_END_OF_LIST(), +}; + +static void debugexit_isa_class_initfn(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + ISADeviceClass *ic = ISA_DEVICE_CLASS(klass); + ic->init = debugexit_isa_initfn; + dc->props = debugexit_isa_properties; +} + +static TypeInfo debugexit_isa_info = { + .name = "isa-debugexit", + .parent = TYPE_ISA_DEVICE, + .instance_size = sizeof(ISADebugExitState), + .class_init = debugexit_isa_class_initfn, +}; + +static void debugexit_register_types(void) +{ + type_register_static(&debugexit_isa_info); +} + +type_init(debugexit_register_types) diff --git a/hw/i386/Makefile.objs b/hw/i386/Makefile.objs index 8c764bb..b34c61c 100644 --- a/hw/i386/Makefile.objs +++ b/hw/i386/Makefile.objs @@ -3,7 +3,7 @@ obj-y += apic_common.o apic.o kvmvapic.o obj-y += sga.o ioapic_common.o ioapic.o piix_pci.o obj-y += vmport.o obj-y += pci-hotplug.o smbios.o wdt_ib700.o -obj-y += debugcon.o multiboot.o +obj-y += debugcon.o debugexit.o multiboot.o obj-y += pc_piix.o obj-y += pc_sysfw.o obj-$(CONFIG_XEN) += xen_platform.o xen_apic.o