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From: Andrew Murray <andrew.murray@arm.com>
To: Christoffer Dall <christoffer.dall@arm.com>,
	Marc Zyngier <marc.zyngier@arm.com>
Cc: kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org
Subject: [PATCH v10 2/5] KVM: arm/arm64: extract duplicated code to own function
Date: Mon, 17 Jun 2019 20:01:02 +0100	[thread overview]
Message-ID: <20190617190105.4662-3-andrew.murray@arm.com> (raw)
In-Reply-To: <20190617190105.4662-1-andrew.murray@arm.com>

Let's reduce code duplication by extracting common code to its own
function.

Signed-off-by: Andrew Murray <andrew.murray@arm.com>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
---
 virt/kvm/arm/pmu.c | 28 ++++++++++++++++------------
 1 file changed, 16 insertions(+), 12 deletions(-)

diff --git a/virt/kvm/arm/pmu.c b/virt/kvm/arm/pmu.c
index c5a722ad283f..6e7c179103a6 100644
--- a/virt/kvm/arm/pmu.c
+++ b/virt/kvm/arm/pmu.c
@@ -64,6 +64,19 @@ void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu, u64 select_idx, u64 val)
 	__vcpu_sys_reg(vcpu, reg) += (s64)val - kvm_pmu_get_counter_value(vcpu, select_idx);
 }
 
+/**
+ * kvm_pmu_release_perf_event - remove the perf event
+ * @pmc: The PMU counter pointer
+ */
+static void kvm_pmu_release_perf_event(struct kvm_pmc *pmc)
+{
+	if (pmc->perf_event) {
+		perf_event_disable(pmc->perf_event);
+		perf_event_release_kernel(pmc->perf_event);
+		pmc->perf_event = NULL;
+	}
+}
+
 /**
  * kvm_pmu_stop_counter - stop PMU counter
  * @pmc: The PMU counter pointer
@@ -79,9 +92,7 @@ static void kvm_pmu_stop_counter(struct kvm_vcpu *vcpu, struct kvm_pmc *pmc)
 		reg = (pmc->idx == ARMV8_PMU_CYCLE_IDX)
 		       ? PMCCNTR_EL0 : PMEVCNTR0_EL0 + pmc->idx;
 		__vcpu_sys_reg(vcpu, reg) = counter;
-		perf_event_disable(pmc->perf_event);
-		perf_event_release_kernel(pmc->perf_event);
-		pmc->perf_event = NULL;
+		kvm_pmu_release_perf_event(pmc);
 	}
 }
 
@@ -112,15 +123,8 @@ void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu)
 	int i;
 	struct kvm_pmu *pmu = &vcpu->arch.pmu;
 
-	for (i = 0; i < ARMV8_PMU_MAX_COUNTERS; i++) {
-		struct kvm_pmc *pmc = &pmu->pmc[i];
-
-		if (pmc->perf_event) {
-			perf_event_disable(pmc->perf_event);
-			perf_event_release_kernel(pmc->perf_event);
-			pmc->perf_event = NULL;
-		}
-	}
+	for (i = 0; i < ARMV8_PMU_MAX_COUNTERS; i++)
+		kvm_pmu_release_perf_event(&pmu->pmc[i]);
 }
 
 u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu)
-- 
2.21.0

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  parent reply	other threads:[~2019-06-17 19:01 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-17 19:01 [PATCH v10 0/5] KVM: arm/arm64: add support for chained counters Andrew Murray
2019-06-17 19:01 ` [PATCH v10 1/5] KVM: arm/arm64: rename kvm_pmu_{enable/disable}_counter functions Andrew Murray
2019-06-17 19:01 ` Andrew Murray [this message]
2019-06-17 19:01 ` [PATCH v10 3/5] KVM: arm/arm64: re-create event when setting counter value Andrew Murray
2019-06-17 19:01 ` [PATCH v10 4/5] KVM: arm/arm64: remove pmc->bitmask Andrew Murray
2019-06-17 19:01 ` [PATCH v10 5/5] KVM: arm/arm64: support chained PMU counters Andrew Murray

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