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From 583b819622f77c9e62bf3cd4f44b08de8aa46dcd Mon Sep 17 00:00:00 2001
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From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
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Date: Thu, 25 Jun 2015 16:34:25 +0200
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Subject: Migration compat for pckbd
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Patchwork-id: 66497
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O-Subject: [RHEL-7.2 qemu-kvm-rhev PATCH 1/1] Migration compat for pckbd
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Bugzilla: 1215092
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RH-Acked-by: Juan Quintela <quintela@redhat.com>
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RH-Acked-by: Laszlo Ersek <lersek@redhat.com>
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RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
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From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
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2.2 added a new subsection to the pc keyboard model to preserve
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the value of 'outport' across migration; to maintain migration
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backwards compatibility this patch disables it on older machine types.
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This leaves us no-worse-off than in older versions.
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Even with the new code, the value migrated in 'outport' isn't used
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anywhere in the pckbd model; for example the value migrated doesn't
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change the state of the A20 line or potentially do a reset.
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The only effect, as far as I can tell is if the guest were to
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explicitly read the outport value it might get a more sensible reply.
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Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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(cherry picked from commit d2aba8a17b40c081f2ce29bc12b3945b7fb91d53)
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---
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hw/input/pckbd.c | 6 ++++++
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1 file changed, 6 insertions(+)
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diff --git a/hw/input/pckbd.c b/hw/input/pckbd.c
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index 62678f3..7d43237 100644
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--- a/hw/input/pckbd.c
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+++ b/hw/input/pckbd.c
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@@ -26,6 +26,7 @@
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#include "hw/isa/isa.h"
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#include "hw/i386/pc.h"
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#include "hw/input/ps2.h"
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+#include "migration/migration.h"
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#include "sysemu/sysemu.h"
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/* debug PC keyboard */
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@@ -389,6 +390,11 @@ static int kbd_outport_post_load(void *opaque, int version_id)
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static bool kbd_outport_needed(void *opaque)
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{
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KBDState *s = opaque;
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+
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+ if (migrate_pre_2_2) {
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+ return false;
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+ }
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+
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return s->outport != kbd_outport_default(s);
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}
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--
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1.8.3.1
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