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spapr: Add support for new NMI interface
This implements an NMI interface POWERPC SPAPR machine. This enables an "nmi" HMP/QMP command supported on SPAPR. This calls POWERPC_EXCP_RESET (vector 0x100) in the guest to deliver NMI to every CPU. The expected result is XMON (in-kernel debugger) invocation. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Reviewed-by: Alexander Graf <agraf@suse.de> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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@ -55,6 +55,7 @@
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#include "qemu/config-file.h"
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#include "qemu/error-report.h"
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#include "trace.h"
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#include "hw/nmi.h"
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#include <libfdt.h>
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@ -1576,10 +1577,28 @@ static void spapr_machine_initfn(Object *obj)
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spapr_get_kvm_type, spapr_set_kvm_type, NULL);
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}
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static void ppc_cpu_do_nmi_on_cpu(void *arg)
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{
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CPUState *cs = arg;
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cpu_synchronize_state(cs);
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ppc_cpu_do_system_reset(cs);
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}
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static void spapr_nmi(NMIState *n, int cpu_index, Error **errp)
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{
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CPUState *cs;
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CPU_FOREACH(cs) {
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async_run_on_cpu(cs, ppc_cpu_do_nmi_on_cpu, cs);
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}
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}
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static void spapr_machine_class_init(ObjectClass *oc, void *data)
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{
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MachineClass *mc = MACHINE_CLASS(oc);
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FWPathProviderClass *fwc = FW_PATH_PROVIDER_CLASS(oc);
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NMIClass *nc = NMI_CLASS(oc);
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mc->name = "pseries";
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mc->desc = "pSeries Logical Partition (PAPR compliant)";
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@ -1593,6 +1612,7 @@ static void spapr_machine_class_init(ObjectClass *oc, void *data)
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mc->kvm_type = spapr_kvm_type;
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fwc->get_dev_path = spapr_get_fw_dev_path;
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nc->nmi_monitor_handler = spapr_nmi;
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}
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static const TypeInfo spapr_machine_info = {
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@ -1603,6 +1623,7 @@ static const TypeInfo spapr_machine_info = {
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.class_init = spapr_machine_class_init,
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.interfaces = (InterfaceInfo[]) {
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{ TYPE_FW_PATH_PROVIDER },
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{ TYPE_NMI },
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{ }
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},
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};
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@ -127,6 +127,7 @@ int ppc64_cpu_write_elf64_qemunote(WriteCoreDumpFunction f,
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int ppc64_cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cs,
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int cpuid, void *opaque);
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#ifndef CONFIG_USER_ONLY
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void ppc_cpu_do_system_reset(CPUState *cs);
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extern const struct VMStateDescription vmstate_ppc_cpu;
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typedef struct PPCTimebase {
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@ -810,6 +810,14 @@ void ppc_hw_interrupt(CPUPPCState *env)
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}
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}
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}
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void ppc_cpu_do_system_reset(CPUState *cs)
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{
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PowerPCCPU *cpu = POWERPC_CPU(cs);
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CPUPPCState *env = &cpu->env;
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powerpc_excp(cpu, env->excp_model, POWERPC_EXCP_RESET);
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}
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#endif /* !CONFIG_USER_ONLY */
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#if defined(DEBUG_OP)
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