From patchwork Mon Oct 7 20:57:22 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cole Robinson X-Patchwork-Id: 281268 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 5F6F62C00D0 for ; Tue, 8 Oct 2013 07:58:05 +1100 (EST) Received: from localhost ([::1]:33465 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VTHsQ-0000e1-OZ for incoming@patchwork.ozlabs.org; Mon, 07 Oct 2013 16:58:02 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:39805) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VTHs4-0000dk-52 for qemu-devel@nongnu.org; Mon, 07 Oct 2013 16:57:44 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1VTHrz-0000Gc-NR for qemu-devel@nongnu.org; Mon, 07 Oct 2013 16:57:40 -0400 Received: from mx1.redhat.com ([209.132.183.28]:6757) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VTHrz-0000GX-ES for qemu-devel@nongnu.org; Mon, 07 Oct 2013 16:57:35 -0400 Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id r97KvWVP001756 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Mon, 7 Oct 2013 16:57:32 -0400 Received: from colepc.home.com (ovpn-113-149.phx2.redhat.com [10.3.113.149]) by int-mx09.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id r97KvUGA004109; Mon, 7 Oct 2013 16:57:30 -0400 From: Cole Robinson To: qemu-devel@nongnu.org Date: Mon, 7 Oct 2013 16:57:22 -0400 Message-Id: X-Scanned-By: MIMEDefang 2.68 on 10.5.11.22 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 209.132.183.28 Cc: Cole Robinson , david@gibson.dropbear.id.au, mst@redhat.com Subject: [Qemu-devel] [PATCH] Fix pc migration from qemu <= 1.5 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 The following commit introduced a migration incompatibility: commit 568f0690fd9aa4d39d84b04c1a5dbb53a915c3fe Author: David Gibson Date: Thu Jun 6 18:48:49 2013 +1000 pci: Replace pci_find_domain() with more general pci_root_bus_path() The issue is that i440fx savevm idstr went from 0000:00:00.0/I440FX to 0000:00.0/I440FX. Unfortunately we are stuck with the breakage for 1.6 machine types. Add a compat property to maintain the busted idstr for the 1.6 machine types, but revert to the old style format for 1.7+, and <= 1.5. Tested with migration from qemu 1.5, qemu 1.6, and qemu.git. Signed-off-by: Cole Robinson Reviewed-by: Paolo Bonzini --- hw/i386/pc_piix.c | 4 ++++ hw/i386/pc_q35.c | 4 ++++ hw/pci-host/piix.c | 9 ++++++++- hw/pci-host/q35.c | 10 ++++++++-- include/hw/i386/pc.h | 28 ++++++++++++++++++++++++++++ include/hw/pci-host/q35.h | 1 + 6 files changed, 53 insertions(+), 3 deletions(-) diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c index c6042c7..90f1ea4 100644 --- a/hw/i386/pc_piix.c +++ b/hw/i386/pc_piix.c @@ -346,6 +346,10 @@ static QEMUMachine pc_i440fx_machine_v1_7 = { .alias = "pc", .init = pc_init_pci, .is_default = 1, + .compat_props = (GlobalProperty[]) { + PC_COMPAT_1_7, + { /* end of list */ } + }, }; #define PC_I440FX_1_6_MACHINE_OPTIONS PC_I440FX_MACHINE_OPTIONS diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c index ca84e1c..569f946 100644 --- a/hw/i386/pc_q35.c +++ b/hw/i386/pc_q35.c @@ -270,6 +270,10 @@ static QEMUMachine pc_q35_machine_v1_7 = { .name = "pc-q35-1.7", .alias = "q35", .init = pc_q35_init, + .compat_props = (GlobalProperty[]) { + PC_COMPAT_1_7, + { /* end of list */ } + }, }; #define PC_Q35_1_6_MACHINE_OPTIONS PC_Q35_MACHINE_OPTIONS diff --git a/hw/pci-host/piix.c b/hw/pci-host/piix.c index c041149..9dafe80 100644 --- a/hw/pci-host/piix.c +++ b/hw/pci-host/piix.c @@ -48,6 +48,7 @@ typedef struct I440FXState { PCIHostState parent_obj; PcPciInfo pci_info; uint64_t pci_hole64_size; + uint32_t short_root_bus; } I440FXState; #define PIIX_NUM_PIC_IRQS 16 /* i8259 * 2 */ @@ -712,13 +713,19 @@ static const TypeInfo i440fx_info = { static const char *i440fx_pcihost_root_bus_path(PCIHostState *host_bridge, PCIBus *rootbus) { + I440FXState *s = I440FX_PCI_HOST_BRIDGE(host_bridge); + /* For backwards compat with old device paths */ - return "0000"; + if (s->short_root_bus) { + return "0000"; + } + return "0000:00"; } static Property i440fx_props[] = { DEFINE_PROP_SIZE(PCI_HOST_PROP_PCI_HOLE64_SIZE, I440FXState, pci_hole64_size, DEFAULT_PCI_HOLE64_SIZE), + DEFINE_PROP_UINT32("short_root_bus", I440FXState, short_root_bus, 0), DEFINE_PROP_END_OF_LIST(), }; diff --git a/hw/pci-host/q35.c b/hw/pci-host/q35.c index ad703a4..cb3abfd 100644 --- a/hw/pci-host/q35.c +++ b/hw/pci-host/q35.c @@ -61,8 +61,13 @@ static void q35_host_realize(DeviceState *dev, Error **errp) static const char *q35_host_root_bus_path(PCIHostState *host_bridge, PCIBus *rootbus) { - /* For backwards compat with old device paths */ - return "0000"; + Q35PCIHost *s = Q35_HOST_DEVICE(host_bridge); + + /* For backwards compat with old device paths */ + if (s->mch.short_root_bus) { + return "0000"; + } + return "0000:00"; } static void q35_host_get_pci_hole_start(Object *obj, Visitor *v, @@ -114,6 +119,7 @@ static Property mch_props[] = { MCH_HOST_BRIDGE_PCIEXBAR_DEFAULT), DEFINE_PROP_SIZE(PCI_HOST_PROP_PCI_HOLE64_SIZE, Q35PCIHost, mch.pci_hole64_size, DEFAULT_PCI_HOLE64_SIZE), + DEFINE_PROP_UINT32("short_root_bus", Q35PCIHost, mch.short_root_bus, 0), DEFINE_PROP_END_OF_LIST(), }; diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h index 9b2ddc4..f9266f0 100644 --- a/include/hw/i386/pc.h +++ b/include/hw/i386/pc.h @@ -225,11 +225,31 @@ void pvpanic_init(ISABus *bus); int e820_add_entry(uint64_t, uint64_t, uint32_t); +#define PC_COMPAT_1_7 \ + {\ + .driver = "i440FX-pcihost",\ + .property = "short_root_bus",\ + .value = stringify(0),\ + },{\ + .driver = "mch",\ + .property = "short_root_bus",\ + .value = stringify(0),\ + } + #define PC_COMPAT_1_6 \ + PC_COMPAT_1_7, \ {\ .driver = "e1000",\ .property = "mitigation",\ .value = "off",\ + },{\ + .driver = "i440FX-pcihost",\ + .property = "short_root_bus",\ + .value = stringify(1),\ + },{\ + .driver = "mch",\ + .property = "short_root_bus",\ + .value = stringify(1),\ } #define PC_COMPAT_1_5 \ @@ -266,6 +286,14 @@ int e820_add_entry(uint64_t, uint64_t, uint32_t); .driver = TYPE_X86_CPU,\ .property = "pmu",\ .value = "on",\ + },{\ + .driver = "i440FX-pcihost",\ + .property = "short_root_bus",\ + .value = stringify(0),\ + },{\ + .driver = "mch",\ + .property = "short_root_bus",\ + .value = stringify(0),\ } #define PC_COMPAT_1_4 \ diff --git a/include/hw/pci-host/q35.h b/include/hw/pci-host/q35.h index 56de92e..c8362b9 100644 --- a/include/hw/pci-host/q35.h +++ b/include/hw/pci-host/q35.h @@ -61,6 +61,7 @@ typedef struct MCHPCIState { ram_addr_t above_4g_mem_size; uint64_t pci_hole64_size; PcGuestInfo *guest_info; + uint32_t short_root_bus; } MCHPCIState; typedef struct Q35PCIHost {