aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rw-r--r--arch/loongarch/kvm/exit.c13
-rw-r--r--arch/loongarch/kvm/timer.c12
-rw-r--r--arch/loongarch/kvm/vcpu.c9
3 files changed, 19 insertions, 15 deletions
diff --git a/arch/loongarch/kvm/exit.c b/arch/loongarch/kvm/exit.c
index ce8de3fa472c..e708a1786d6b 100644
--- a/arch/loongarch/kvm/exit.c
+++ b/arch/loongarch/kvm/exit.c
@@ -200,17 +200,8 @@ int kvm_emu_idle(struct kvm_vcpu *vcpu)
++vcpu->stat.idle_exits;
trace_kvm_exit_idle(vcpu, KVM_TRACE_EXIT_IDLE);
- if (!kvm_arch_vcpu_runnable(vcpu)) {
- /*
- * Switch to the software timer before halt-polling/blocking as
- * the guest's timer may be a break event for the vCPU, and the
- * hypervisor timer runs only when the CPU is in guest mode.
- * Switch before halt-polling so that KVM recognizes an expired
- * timer before blocking.
- */
- kvm_save_timer(vcpu);
- kvm_vcpu_block(vcpu);
- }
+ if (!kvm_arch_vcpu_runnable(vcpu))
+ kvm_vcpu_halt(vcpu);
return EMULATE_DONE;
}
diff --git a/arch/loongarch/kvm/timer.c b/arch/loongarch/kvm/timer.c
index 284bf553fefe..12d58040122d 100644
--- a/arch/loongarch/kvm/timer.c
+++ b/arch/loongarch/kvm/timer.c
@@ -155,11 +155,17 @@ static void _kvm_save_timer(struct kvm_vcpu *vcpu)
*/
hrtimer_cancel(&vcpu->arch.swtimer);
hrtimer_start(&vcpu->arch.swtimer, expire, HRTIMER_MODE_ABS_PINNED);
- } else
+ } else if (vcpu->stat.generic.blocking) {
/*
- * Inject timer interrupt so that hall polling can dectect and exit
+ * Inject timer interrupt so that halt polling can dectect and exit.
+ * VCPU is scheduled out already and sleeps in rcuwait queue and
+ * will not poll pending events again. kvm_queue_irq() is not enough,
+ * hrtimer swtimer should be used here.
*/
- kvm_queue_irq(vcpu, INT_TI);
+ expire = ktime_add_ns(ktime_get(), 10);
+ vcpu->arch.expire = expire;
+ hrtimer_start(&vcpu->arch.swtimer, expire, HRTIMER_MODE_ABS_PINNED);
+ }
}
/*
diff --git a/arch/loongarch/kvm/vcpu.c b/arch/loongarch/kvm/vcpu.c
index 73d0c2b9c1a5..54f544b30f32 100644
--- a/arch/loongarch/kvm/vcpu.c
+++ b/arch/loongarch/kvm/vcpu.c
@@ -187,8 +187,15 @@ int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
{
- return kvm_pending_timer(vcpu) ||
+ int ret;
+
+ /* Protect from TOD sync and vcpu_load/put() */
+ preempt_disable();
+ ret = kvm_pending_timer(vcpu) ||
kvm_read_hw_gcsr(LOONGARCH_CSR_ESTAT) & (1 << INT_TI);
+ preempt_enable();
+
+ return ret;
}
int kvm_arch_vcpu_dump_regs(struct kvm_vcpu *vcpu)