linux-kernel - [PATCH] KVM: arm/arm64: show halt poll counters in debugfs

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Date:   Sun, 27 Oct 2019 09:19:50 +0100
From:   Christian Borntraeger <borntraeger@...ibm.com>
To:     Marc Zyngier <maz@...nel.org>
Cc:     James Morse <james.morse@....com>,
        Julien Thierry <julien.thierry.kdev@...il.com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        kvmarm@...ts.cs.columbia.edu, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Christian Borntraeger <borntraeger@...ibm.com>
Subject: [PATCH] KVM: arm/arm64: show halt poll counters in debugfs

ARM/ARM64 has counters halt_successful_poll, halt_attempted_poll,
halt_poll_invalid, and halt_wakeup but never exposed those in debugfs.

Signed-off-by: Christian Borntraeger <borntraeger@...ibm.com>
---
This patch is untested
 arch/arm/kvm/guest.c   | 4 ++++
 arch/arm64/kvm/guest.c | 4 ++++
 2 files changed, 8 insertions(+)

diff --git a/arch/arm/kvm/guest.c b/arch/arm/kvm/guest.c
index 684cf64..6696464 100644
--- a/arch/arm/kvm/guest.c
+++ b/arch/arm/kvm/guest.c
@@ -21,6 +21,10 @@
 #define VCPU_STAT(x) { #x, offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU }
 
 struct kvm_stats_debugfs_item debugfs_entries[] = {
+	VCPU_STAT(halt_successful_poll),
+	VCPU_STAT(halt_attempted_poll),
+	VCPU_STAT(halt_poll_invalid),
+	VCPU_STAT(halt_wakeup),
 	VCPU_STAT(hvc_exit_stat),
 	VCPU_STAT(wfe_exit_stat),
 	VCPU_STAT(wfi_exit_stat),
diff --git a/arch/arm64/kvm/guest.c b/arch/arm64/kvm/guest.c
index dfd6264..260ea31 100644
--- a/arch/arm64/kvm/guest.c
+++ b/arch/arm64/kvm/guest.c
@@ -34,6 +34,10 @@
 #define VCPU_STAT(x) { #x, offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU }
 
 struct kvm_stats_debugfs_item debugfs_entries[] = {
+	VCPU_STAT(halt_successful_poll),
+	VCPU_STAT(halt_attempted_poll),
+	VCPU_STAT(halt_poll_invalid),
+	VCPU_STAT(halt_wakeup),
 	VCPU_STAT(hvc_exit_stat),
 	VCPU_STAT(wfe_exit_stat),
 	VCPU_STAT(wfi_exit_stat),
-- 
1.8.3.1