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target-i386: Add infrastructure for reporting TPR MMIO accesses

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This will allow the APIC core to file a TPR access report. Depending on
the accelerator and kernel irqchip mode, it will either be delivered
right away or queued for later reporting.

In TCG mode, we can restart the triggering instruction and can therefore
forward the event directly. KVM does not allows us to restart, so we
postpone the delivery of events recording in the user space APIC until
the current instruction is completed.

Note that KVM without in-kernel irqchip will report the address after
the instruction that triggered the access.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Jan Kiszka 2012-02-17 18:31:17 +01:00 • committed by Avi Kivity
parent d798e97456
commit d362e757d3
7 changed files with 62 additions and 4 deletions
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5
hw/apic_common.c
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@ -68,6 +68,11 @@ uint8_t cpu_get_apic_tpr(DeviceState *d)
return s ? s->tpr >> 4 : 0;
}
void apic_handle_tpr_access_report(DeviceState *d, target_ulong ip,
TPRAccess access)
{
}
void apic_report_irq_delivered(int delivered)
{
apic_irq_delivered += delivered;