From: Bibo Mao <maobibo@loongson.cn>
Date: Mon, 21 Jul 2025 01:26:32 +0000 (+0800)
Subject: LoongArch: KVM: Add stat information with kernel irqchip
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=46ecfb68ddd88118dcf623f21785d78f69337631;p=thirdparty%2Fkernel%2Flinux.git

LoongArch: KVM: Add stat information with kernel irqchip

Move stat information about kernel irqchip from VM to vCPU, since all
vm exiting events should be vCPU relative. And also add entry with
structure kvm_vcpu_stats_desc[], so that it can display with directory
/sys/kernel/debug/kvm.

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

diff --git a/arch/loongarch/include/asm/kvm_host.h b/arch/loongarch/include/asm/kvm_host.h
index a3c4cc46c8922..0cecbd038bb3c 100644
--- a/arch/loongarch/include/asm/kvm_host.h
+++ b/arch/loongarch/include/asm/kvm_host.h
@@ -50,12 +50,6 @@ struct kvm_vm_stat {
 	struct kvm_vm_stat_generic generic;
 	u64 pages;
 	u64 hugepages;
-	u64 ipi_read_exits;
-	u64 ipi_write_exits;
-	u64 eiointc_read_exits;
-	u64 eiointc_write_exits;
-	u64 pch_pic_read_exits;
-	u64 pch_pic_write_exits;
 };
 
 struct kvm_vcpu_stat {
@@ -65,6 +59,12 @@ struct kvm_vcpu_stat {
 	u64 cpucfg_exits;
 	u64 signal_exits;
 	u64 hypercall_exits;
+	u64 ipi_read_exits;
+	u64 ipi_write_exits;
+	u64 eiointc_read_exits;
+	u64 eiointc_write_exits;
+	u64 pch_pic_read_exits;
+	u64 pch_pic_write_exits;
 };
 
 #define KVM_MEM_HUGEPAGE_CAPABLE	(1UL << 0)
diff --git a/arch/loongarch/kvm/intc/eiointc.c b/arch/loongarch/kvm/intc/eiointc.c
index c52a478fbb10e..a3a12af9ecbff 100644
--- a/arch/loongarch/kvm/intc/eiointc.c
+++ b/arch/loongarch/kvm/intc/eiointc.c
@@ -173,7 +173,7 @@ static int kvm_eiointc_read(struct kvm_vcpu *vcpu,
 
 	offset = addr & 0x7;
 	addr -= offset;
-	vcpu->kvm->stat.eiointc_read_exits++;
+	vcpu->stat.eiointc_read_exits++;
 	spin_lock_irqsave(&eiointc->lock, flags);
 	ret = loongarch_eiointc_read(vcpu, eiointc, addr, &data);
 	spin_unlock_irqrestore(&eiointc->lock, flags);
@@ -307,7 +307,7 @@ static int kvm_eiointc_write(struct kvm_vcpu *vcpu,
 		return -EINVAL;
 	}
 
-	vcpu->kvm->stat.eiointc_write_exits++;
+	vcpu->stat.eiointc_write_exits++;
 	spin_lock_irqsave(&eiointc->lock, flags);
 	switch (len) {
 	case 1:
diff --git a/arch/loongarch/kvm/intc/ipi.c b/arch/loongarch/kvm/intc/ipi.c
index fe734dc062ed4..e658d5b37c044 100644
--- a/arch/loongarch/kvm/intc/ipi.c
+++ b/arch/loongarch/kvm/intc/ipi.c
@@ -268,36 +268,16 @@ static int kvm_ipi_read(struct kvm_vcpu *vcpu,
 			struct kvm_io_device *dev,
 			gpa_t addr, int len, void *val)
 {
-	int ret;
-	struct loongarch_ipi *ipi;
-
-	ipi = vcpu->kvm->arch.ipi;
-	if (!ipi) {
-		kvm_err("%s: ipi irqchip not valid!\n", __func__);
-		return -EINVAL;
-	}
-	ipi->kvm->stat.ipi_read_exits++;
-	ret = loongarch_ipi_readl(vcpu, addr, len, val);
-
-	return ret;
+	vcpu->stat.ipi_read_exits++;
+	return loongarch_ipi_readl(vcpu, addr, len, val);
 }
 
 static int kvm_ipi_write(struct kvm_vcpu *vcpu,
 			struct kvm_io_device *dev,
 			gpa_t addr, int len, const void *val)
 {
-	int ret;
-	struct loongarch_ipi *ipi;
-
-	ipi = vcpu->kvm->arch.ipi;
-	if (!ipi) {
-		kvm_err("%s: ipi irqchip not valid!\n", __func__);
-		return -EINVAL;
-	}
-	ipi->kvm->stat.ipi_write_exits++;
-	ret = loongarch_ipi_writel(vcpu, addr, len, val);
-
-	return ret;
+	vcpu->stat.ipi_write_exits++;
+	return loongarch_ipi_writel(vcpu, addr, len, val);
 }
 
 static const struct kvm_io_device_ops kvm_ipi_ops = {
diff --git a/arch/loongarch/kvm/intc/pch_pic.c b/arch/loongarch/kvm/intc/pch_pic.c
index 08fce845f6680..6f00ffe05c544 100644
--- a/arch/loongarch/kvm/intc/pch_pic.c
+++ b/arch/loongarch/kvm/intc/pch_pic.c
@@ -196,7 +196,7 @@ static int kvm_pch_pic_read(struct kvm_vcpu *vcpu,
 	}
 
 	/* statistics of pch pic reading */
-	vcpu->kvm->stat.pch_pic_read_exits++;
+	vcpu->stat.pch_pic_read_exits++;
 	ret = loongarch_pch_pic_read(s, addr, len, val);
 
 	return ret;
@@ -303,7 +303,7 @@ static int kvm_pch_pic_write(struct kvm_vcpu *vcpu,
 	}
 
 	/* statistics of pch pic writing */
-	vcpu->kvm->stat.pch_pic_write_exits++;
+	vcpu->stat.pch_pic_write_exits++;
 	ret = loongarch_pch_pic_write(s, addr, len, val);
 
 	return ret;
diff --git a/arch/loongarch/kvm/vcpu.c b/arch/loongarch/kvm/vcpu.c
index 5af32ec62cb16..d1b8c50941ca2 100644
--- a/arch/loongarch/kvm/vcpu.c
+++ b/arch/loongarch/kvm/vcpu.c
@@ -20,7 +20,13 @@ const struct _kvm_stats_desc kvm_vcpu_stats_desc[] = {
 	STATS_DESC_COUNTER(VCPU, idle_exits),
 	STATS_DESC_COUNTER(VCPU, cpucfg_exits),
 	STATS_DESC_COUNTER(VCPU, signal_exits),
-	STATS_DESC_COUNTER(VCPU, hypercall_exits)
+	STATS_DESC_COUNTER(VCPU, hypercall_exits),
+	STATS_DESC_COUNTER(VCPU, ipi_read_exits),
+	STATS_DESC_COUNTER(VCPU, ipi_write_exits),
+	STATS_DESC_COUNTER(VCPU, eiointc_read_exits),
+	STATS_DESC_COUNTER(VCPU, eiointc_write_exits),
+	STATS_DESC_COUNTER(VCPU, pch_pic_read_exits),
+	STATS_DESC_COUNTER(VCPU, pch_pic_write_exits)
 };
 
 const struct kvm_stats_header kvm_vcpu_stats_header = {