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hv: signal_event after make_request 

make_request sets the request bit, and signal_event wakes the vcpu
thread. If we signal_event comes first, the target vCPU has a chance to
sleep again before processing the request bit.

Tracked-On: #8507
Signed-off-by: Wu Zhou <wu.zhou@intel.com>
Reviewed-by: Junjie Mao <junjie.mao@intel.com>
This commit is contained in:
Wu Zhou 2023-09-05 14:39:35 +08:00 committed by acrnsi-robot
parent 064be1e3e6
commit 9a6e940849
2 changed files with 2 additions and 2 deletions
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2
hypervisor/arch/x86/guest/vcpu.c
View File

@ -1049,8 +1049,8 @@ void vcpu_handle_pi_notification(uint32_t vcpu_index)
* Record this request as ACRN_REQUEST_EVENT,
* so that vlapic_inject_intr() will sync PIR to vIRR
*/
signal_event(&vcpu->events[VCPU_EVENT_VIRTUAL_INTERRUPT]);
vcpu_make_request(vcpu, ACRN_REQUEST_EVENT);
signal_event(&vcpu->events[VCPU_EVENT_VIRTUAL_INTERRUPT]);
}
}
}

2
hypervisor/arch/x86/guest/vlapic.c
View File

@ -532,8 +532,8 @@ static void vlapic_accept_intr(struct acrn_vlapic *vlapic, uint32_t vector, bool
if ((lapic->svr.v & APIC_SVR_ENABLE) == 0U) {
dev_dbg(DBG_LEVEL_VLAPIC, "vlapic is software disabled, ignoring interrupt %u", vector);
} else {
signal_event(&vlapic2vcpu(vlapic)->events[VCPU_EVENT_VIRTUAL_INTERRUPT]);
vlapic->ops->accept_intr(vlapic, vector, level);
signal_event(&vlapic2vcpu(vlapic)->events[VCPU_EVENT_VIRTUAL_INTERRUPT]);
}
}