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target/ppc: Make checkstop actually stop the system

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checkstop state does not halt the system, interrupts continue to be
serviced, and other CPUs run. Make it stop the machine with
qemu_system_guest_panicked.

Reviewed-by: Glenn Miles <milesg@linux.ibm.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
This commit is contained in:
Nicholas Piggin 2023-06-12 03:02:15 +10:00
parent c10c6ce032
commit cce7aee8dd
1 changed files with 13 additions and 3 deletions
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16
target/ppc/excp_helper.c
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@ -19,6 +19,8 @@
#include "qemu/osdep.h"
#include "qemu/main-loop.h"
#include "qemu/log.h"
#include "sysemu/sysemu.h"
#include "sysemu/runstate.h"
#include "cpu.h"
#include "exec/exec-all.h"
#include "internal.h"
@ -425,6 +427,8 @@ static void powerpc_set_excp_state(PowerPCCPU *cpu, target_ulong vector,
static void powerpc_mcheck_checkstop(CPUPPCState *env)
{
/* KVM guests always have MSR[ME] enabled */
#ifdef CONFIG_TCG
CPUState *cs = env_cpu(env);
if (FIELD_EX64(env->msr, MSR, ME)) {
@ -437,9 +441,15 @@ static void powerpc_mcheck_checkstop(CPUPPCState *env)
if (qemu_log_separate()) {
qemu_log("Machine check while not allowed. "
"Entering checkstop state\n");
}
cs->halted = 1;
cpu_interrupt_exittb(cs);
/*
* This stops the machine and logs CPU state without killing QEMU
* (like cpu_abort()) so the machine can still be debugged (because
* it is often a guest error).
*/
qemu_system_guest_panicked(NULL);
cpu_loop_exit_noexc(cs);
#endif
}
static void powerpc_excp_40x(PowerPCCPU *cpu, int excp)