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target/ppc: Fix timebase reset with record-replay 

Timebase save uses a random number for a legacy vmstate field, which
makes rr snapshot loading unbalanced. The easiest way to deal with this
is just to skip the rng if record-replay is active.

Reviewed-by: Pavel Dovgalyuk <Pavel.Dovgalyuk@ispras.ru>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
master
Nicholas Piggin 2023-08-08 14:19:56 +10:00 committed by Cédric Le Goater
parent cdab53dd22
commit 9db680f8fd
1 changed files with 9 additions and 2 deletions
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11
hw/ppc/ppc.c
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@ -32,6 +32,7 @@
#include "qemu/main-loop.h"
#include "qemu/error-report.h"
#include "sysemu/kvm.h"
#include "sysemu/replay.h"
#include "sysemu/runstate.h"
#include "kvm_ppc.h"
#include "migration/vmstate.h"
@ -974,8 +975,14 @@ static void timebase_save(PPCTimebase *tb)
return;
}
/* not used anymore, we keep it for compatibility */
tb->time_of_the_day_ns = qemu_clock_get_ns(QEMU_CLOCK_HOST);
if (replay_mode == REPLAY_MODE_NONE) {
/* not used anymore, we keep it for compatibility */
tb->time_of_the_day_ns = qemu_clock_get_ns(QEMU_CLOCK_HOST);
} else {
/* simpler for record-replay to avoid this event, compat not needed */
tb->time_of_the_day_ns = 0;
}
/*
* tb_offset is only expected to be changed by QEMU so
* there is no need to update it from KVM here