linux-kernel - [PATCH 2/4] LoongArch: KVM: Add msgint registers in function kvm_init_gcsr

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Message-Id: <20260128030326.3377462-3-maobibo@loongson.cn>
Date: Wed, 28 Jan 2026 11:03:24 +0800
From: Bibo Mao <maobibo@...ngson.cn>
To: Huacai Chen <chenhuacai@...nel.org>,
	WANG Xuerui <kernel@...0n.name>,
	Tianrui Zhao <zhaotianrui@...ngson.cn>
Cc: loongarch@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	kvm@...r.kernel.org
Subject: [PATCH 2/4] LoongArch: KVM: Add msgint registers in function kvm_init_gcsr_flag

Add flag HW_GCSR with msgint registers in function kvm_init_gcsr_flag().

Signed-off-by: Bibo Mao <maobibo@...ngson.cn>
---
 arch/loongarch/include/asm/loongarch.h | 2 +-
 arch/loongarch/kvm/main.c              | 8 ++++++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/arch/loongarch/include/asm/loongarch.h b/arch/loongarch/include/asm/loongarch.h
index 553c4dc7a156..9ca18af11d25 100644
--- a/arch/loongarch/include/asm/loongarch.h
+++ b/arch/loongarch/include/asm/loongarch.h
@@ -688,8 +688,8 @@
 #define LOONGARCH_CSR_ISR1		0xa1
 #define LOONGARCH_CSR_ISR2		0xa2
 #define LOONGARCH_CSR_ISR3		0xa3
-
 #define LOONGARCH_CSR_IRR		0xa4
+#define LOONGARCH_CSR_IPR		0xa5
 
 #define LOONGARCH_CSR_PRID		0xc0
 
diff --git a/arch/loongarch/kvm/main.c b/arch/loongarch/kvm/main.c
index 80ea63d465b8..3ecd7de110d7 100644
--- a/arch/loongarch/kvm/main.c
+++ b/arch/loongarch/kvm/main.c
@@ -192,6 +192,14 @@ static void kvm_init_gcsr_flag(void)
 	set_gcsr_sw_flag(LOONGARCH_CSR_PERFCNTR2);
 	set_gcsr_sw_flag(LOONGARCH_CSR_PERFCTRL3);
 	set_gcsr_sw_flag(LOONGARCH_CSR_PERFCNTR3);
+
+	if (cpu_has_msgint) {
+		set_gcsr_hw_flag(LOONGARCH_CSR_ISR0);
+		set_gcsr_hw_flag(LOONGARCH_CSR_ISR1);
+		set_gcsr_hw_flag(LOONGARCH_CSR_ISR2);
+		set_gcsr_hw_flag(LOONGARCH_CSR_ISR3);
+		set_gcsr_hw_flag(LOONGARCH_CSR_IPR);
+	}
 }
 
 static void kvm_update_vpid(struct kvm_vcpu *vcpu, int cpu)
-- 
2.39.3