A subsequent change to KVM will introduce a vCPU request that could
result in an exit to userspace. Change check_vcpu_requests() to return a
value and document the function. Unconditionally return 1 for now.
Signed-off-by: Oliver Upton <oupton@xxxxxxxxxx>
---
arch/arm64/kvm/arm.c | 16 ++++++++++++++--
1 file changed, 14 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index 6af680675810..f6ce97c0069c 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -719,7 +719,16 @@ void kvm_vcpu_wfi(struct kvm_vcpu *vcpu)
preempt_enable();
}
-static void check_vcpu_requests(struct kvm_vcpu *vcpu)
+/**
+ * check_vcpu_requests - check and handle pending vCPU requests
+ * @vcpu: the VCPU pointer
+ *
+ * Return: 1 if we should enter the guest
+ * 0 if we should exit to userspace
+ * <= 0 if we should exit to userspace, where the return value indicates
+ * an error
+ */
+static int check_vcpu_requests(struct kvm_vcpu *vcpu)
{
if (kvm_request_pending(vcpu)) {
if (kvm_check_request(KVM_REQ_SLEEP, vcpu))
@@ -749,6 +758,8 @@ static void check_vcpu_requests(struct kvm_vcpu *vcpu)
kvm_pmu_handle_pmcr(vcpu,
__vcpu_sys_reg(vcpu, PMCR_EL0));
}
+
+ return 1;
}
static bool vcpu_mode_is_bad_32bit(struct kvm_vcpu *vcpu)
@@ -859,7 +870,8 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu)
update_vmid(&vcpu->arch.hw_mmu->vmid);
- check_vcpu_requests(vcpu);
+ if (ret > 0)
+ ret = check_vcpu_requests(vcpu);
/*
* Preparing the interrupts to be injected also
--
2.35.1.473.g83b2b277ed-goog
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