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apic: Inject external NMI events via LINT1

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On real hardware, NMI button events are injected via the LINT1 line of
the APICs. E.g. kdump expect this wiring and gets upset if the per-APIC
LINT1 mask is not respected, i.e. if NMIs are injected to VCPUs that
should not receive them. Change the APIC emulation code to reflect this.

Based on qemu-kvm patch by Lai Jiangshan.

CC: Lai Jiangshan <laijs@cn.fujitsu.com>
Reported-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
This commit is contained in:
Jan Kiszka 2011-10-18 00:00:06 +08:00
parent ab388a9814
commit 02c091953c
3 changed files with 13 additions and 1 deletions
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6
cpus.c
View File

@ -1217,7 +1217,11 @@ void qmp_inject_nmi(Error **errp)
CPUState *env;
for (env = first_cpu; env != NULL; env = env->next_cpu) {
cpu_interrupt(env, CPU_INTERRUPT_NMI);
if (!env->apic_state) {
cpu_interrupt(env, CPU_INTERRUPT_NMI);
} else {
apic_deliver_nmi(env->apic_state);
}
}
#else
error_set(errp, QERR_UNSUPPORTED);

7
hw/apic.c
View File

@ -205,6 +205,13 @@ void apic_deliver_pic_intr(DeviceState *d, int level)
}
}
void apic_deliver_nmi(DeviceState *d)
{
APICState *s = DO_UPCAST(APICState, busdev.qdev, d);
apic_local_deliver(s, APIC_LVT_LINT1);
}
#define foreach_apic(apic, deliver_bitmask, code) \
{\
int __i, __j, __mask;\

1
hw/apic.h
View File

@ -8,6 +8,7 @@ void apic_deliver_irq(uint8_t dest, uint8_t dest_mode, uint8_t delivery_mode,
uint8_t vector_num, uint8_t trigger_mode);
int apic_accept_pic_intr(DeviceState *s);
void apic_deliver_pic_intr(DeviceState *s, int level);
void apic_deliver_nmi(DeviceState *d);
int apic_get_interrupt(DeviceState *s);
void apic_reset_irq_delivered(void);
int apic_get_irq_delivered(void);