From: Bibo Mao <maobibo@loongson.cn>
Date: Tue, 23 Sep 2025 15:37:09 +0000 (+0800)
Subject: LoongArch: KVM: Add IRR and ISR register read emulation
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=eb626c7704dc9dbc2eee2c2bee281992d36de6da;p=users%2Fhch%2Fmisc.git

LoongArch: KVM: Add IRR and ISR register read emulation

With LS7A user manual, there are registers PCH_PIC_INT_IRR_START
and PCH_PIC_INT_ISR_START. So add read access emulation in function
loongarch_pch_pic_read() here.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
---

diff --git a/arch/loongarch/kvm/intc/pch_pic.c b/arch/loongarch/kvm/intc/pch_pic.c
index f41ef8c42ece..c19cf9d7b08a 100644
--- a/arch/loongarch/kvm/intc/pch_pic.c
+++ b/arch/loongarch/kvm/intc/pch_pic.c
@@ -168,6 +168,12 @@ static int loongarch_pch_pic_read(struct loongarch_pch_pic *s, gpa_t addr, int l
 		/* we only use defalut value 0: high level triggered */
 		*(u32 *)val = 0;
 		break;
+	case PCH_PIC_INT_IRR_START:
+		data = s->irr;
+		break;
+	case PCH_PIC_INT_ISR_START:
+		data = s->isr;
+		break;
 	default:
 		ret = -EINVAL;
 	}