linux-kernel - [PATCH 1/3] LoongArch: KVM: Add stub for kvm_arch_vcpu_preempted_in

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Message-Id: <20250224095618.1436016-2-maobibo@loongson.cn>
Date: Mon, 24 Feb 2025 17:56:16 +0800
From: Bibo Mao <maobibo@...ngson.cn>
To: Tianrui Zhao <zhaotianrui@...ngson.cn>,
	Huacai Chen <chenhuacai@...nel.org>
Cc: WANG Xuerui <kernel@...0n.name>,
	kvm@...r.kernel.org,
	loongarch@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Subject: [PATCH 1/3] LoongArch: KVM: Add stub for kvm_arch_vcpu_preempted_in_kernel

Since Pause-Loop Exiting is not supported by LoongArch hardware, nor
pv spinlock feature is not supported, function kvm_vcpu_on_spin() is
not used. Function kvm_arch_vcpu_preempted_in_kernel() is defined as
stub function here since it is only called by unused function
kvm_vcpu_on_spin().

Signed-off-by: Bibo Mao <maobibo@...ngson.cn>
---
 arch/loongarch/kvm/vcpu.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/loongarch/kvm/vcpu.c b/arch/loongarch/kvm/vcpu.c
index 20f941af3e9e..3318a55a0699 100644
--- a/arch/loongarch/kvm/vcpu.c
+++ b/arch/loongarch/kvm/vcpu.c
@@ -364,6 +364,11 @@ bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu)
 	return false;
 }
 
+bool kvm_arch_vcpu_preempted_in_kernel(struct kvm_vcpu *vcpu)
+{
+	return false;
+}
+
 vm_fault_t kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
 {
 	return VM_FAULT_SIGBUS;
-- 
2.39.3