linux-kernel - [tip: perf/core] KVM: arm64: Convert to the generic perf callbacks

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Message-ID: <163724607868.11128.9418762241597798046.tip-bot2@tip-bot2>
Date:   Thu, 18 Nov 2021 14:34:38 -0000
From:   "tip-bot2 for Sean Christopherson" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Sean Christopherson <seanjc@...gle.com>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Marc Zyngier <maz@...nel.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: perf/core] KVM: arm64: Convert to the generic perf callbacks

The following commit has been merged into the perf/core branch of tip:

Commit-ID:     7b517831a1c6aceb0821860edb9c7bc7d4f803a2
Gitweb:        https://git.kernel.org/tip/7b517831a1c6aceb0821860edb9c7bc7d4f803a2
Author:        Sean Christopherson <seanjc@...gle.com>
AuthorDate:    Thu, 11 Nov 2021 02:07:35 
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Wed, 17 Nov 2021 14:49:11 +01:00

KVM: arm64: Convert to the generic perf callbacks

Drop arm64's version of the callbacks in favor of the callbacks provided
by generic KVM, which are semantically identical.

Signed-off-by: Sean Christopherson <seanjc@...gle.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Reviewed-by: Marc Zyngier <maz@...nel.org>
Link: https://lore.kernel.org/r/20211111020738.2512932-15-seanjc@google.com
---
 arch/arm64/kvm/perf.c | 34 ++--------------------------------
 1 file changed, 2 insertions(+), 32 deletions(-)

diff --git a/arch/arm64/kvm/perf.c b/arch/arm64/kvm/perf.c
index dfa9bce..374c496 100644
--- a/arch/arm64/kvm/perf.c
+++ b/arch/arm64/kvm/perf.c
@@ -13,42 +13,12 @@
 
 DEFINE_STATIC_KEY_FALSE(kvm_arm_pmu_available);
 
-static unsigned int kvm_guest_state(void)
-{
-	struct kvm_vcpu *vcpu = kvm_get_running_vcpu();
-	unsigned int state;
-
-	if (!vcpu)
-		return 0;
-
-	state = PERF_GUEST_ACTIVE;
-	if (!vcpu_mode_priv(vcpu))
-		state |= PERF_GUEST_USER;
-
-	return state;
-}
-
-static unsigned long kvm_get_guest_ip(void)
-{
-	struct kvm_vcpu *vcpu = kvm_get_running_vcpu();
-
-	if (WARN_ON_ONCE(!vcpu))
-		return 0;
-
-	return *vcpu_pc(vcpu);
-}
-
-static struct perf_guest_info_callbacks kvm_guest_cbs = {
-	.state		= kvm_guest_state,
-	.get_ip		= kvm_get_guest_ip,
-};
-
 void kvm_perf_init(void)
 {
-	perf_register_guest_info_callbacks(&kvm_guest_cbs);
+	kvm_register_perf_callbacks(NULL);
 }
 
 void kvm_perf_teardown(void)
 {
-	perf_unregister_guest_info_callbacks(&kvm_guest_cbs);
+	kvm_unregister_perf_callbacks();
 }