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From 27aa81d0b84f03223414eb2e85b7fae0e0d2b86b Mon Sep 17 00:00:00 2001
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From: Eduardo Habkost <ehabkost@redhat.com>
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Date: Wed, 16 Oct 2013 13:07:15 +0200
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Subject: [PATCH 17/18] acpi/piix4: Enable qemu-kvm compatibility mode
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RH-Author: Eduardo Habkost <ehabkost@redhat.com>
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Message-id: <1381928835-10190-1-git-send-email-ehabkost@redhat.com>
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Patchwork-id: 54961
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O-Subject: [qemu-kvm RHEL-7 PATCH] acpi/piix4: Enable qemu-kvm compatibility mode
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Bugzilla: 1019474
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RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
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RH-Acked-by: Orit Wasserman <owasserm@redhat.com>
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RH-Acked-by: Igor Mammedov <imammedo@redhat.com>
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Bugzilla: 1019474
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Scratch build: https://brewweb.devel.redhat.com/taskinfo?taskID=6426533
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Upstream status: not applicable
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>From the code comments:
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qemu-kvm 1.2 uses version 3 but advertised as 2
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To support incoming qemu-kvm 1.2 migration, change version_id
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and minimum_version_id to 2 below (which breaks migration from
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qemu 1.2).
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The v2 format of qemu-0.13 (implemented by upstream commit
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4cf3e6f3d85492f20a773dd6c9068ab89ba24a18, and the one that was used on
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qemu-kvm) is not compatible with the v2 format of qemu-0.15 and newer
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(compatibility was broken by upstream commit
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23910d3f669d46073b403876e30a7314599633af). RHEL-6 is using the former
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format (RHEL-6 commit c4101c5340988caa68da87066a88d3871c8c4bf1), which
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is not compatible with upstream QEMU.
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This sets minimum_version_id to 2, so we enable the qemu-kvm
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compatibility mode, to allow us to load RHEL-6 migration data.
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Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
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---
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hw/acpi/piix4.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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hw/acpi/piix4.c | 2 +-
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1 files changed, 1 insertions(+), 1 deletions(-)
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diff --git a/hw/acpi/piix4.c b/hw/acpi/piix4.c
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index 86ff598..f14867a 100644
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--- a/hw/acpi/piix4.c
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+++ b/hw/acpi/piix4.c
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@@ -278,7 +278,7 @@ static int acpi_load_old(QEMUFile *f, void *opaque, int version_id)
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static const VMStateDescription vmstate_acpi = {
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.name = "piix4_pm",
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.version_id = 3,
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- .minimum_version_id = 3,
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+ .minimum_version_id = 2,
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.minimum_version_id_old = 1,
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.load_state_old = acpi_load_old,
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.post_load = vmstate_acpi_post_load,
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--
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1.7.1
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