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hw/ppc: Fix iothread locking in the 405 code 

When using u-boot as firmware with the taihu board, QEMU aborts with
this assertion:

 ERROR:../accel/tcg/tcg-accel-ops.c:79:tcg_handle_interrupt: assertion failed:
  (qemu_mutex_iothread_locked())

Running QEMU with "-d in_asm" shows that the crash happens when writing
to SPR 0x3f2, so we are missing to lock the iothread in the code path
here.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20211006071140.565952-1-thuth@redhat.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Tested-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Thomas Huth 2021-10-06 09:11:40 +02:00 committed by David Gibson
parent 644c68696e
commit 5ae3d2e8ba
1 changed files with 4 additions and 0 deletions
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4
hw/ppc/ppc.c
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@ -336,6 +336,8 @@ void store_40x_dbcr0(CPUPPCState *env, uint32_t val)
{
PowerPCCPU *cpu = env_archcpu(env);
qemu_mutex_lock_iothread();
switch ((val >> 28) & 0x3) {
case 0x0:
/* No action */
@ -353,6 +355,8 @@ void store_40x_dbcr0(CPUPPCState *env, uint32_t val)
ppc40x_system_reset(cpu);
break;
}
qemu_mutex_unlock_iothread();
}
/* PowerPC 40x internal IRQ controller */