[13/15] KVM: arm64: Drop perf.c and fold its tiny bit of code into pmu.c

Commit Message

Sean Christopherson Aug. 27, 2021, 12:57 a.m. UTC

Fold that last few remnants of perf.c into pmu.c and rename the init
helper as appropriate.

Signed-off-by: Sean Christopherson <[e-mail]>
---
 arch/arm64/include/asm/kvm_host.h |  2 --
 arch/arm64/kvm/Makefile           |  2 +-
 arch/arm64/kvm/arm.c              |  3 ++-
 arch/arm64/kvm/perf.c             | 20 --------------------
 arch/arm64/kvm/pmu.c              |  8 ++++++++
 include/kvm/arm_pmu.h             |  1 +
 6 files changed, 12 insertions(+), 24 deletions(-)
 delete mode 100644 arch/arm64/kvm/perf.c

Patch

diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index 12e8d789e1ac..86c0fdd11ad2 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -670,8 +670,6 @@  unsigned long kvm_mmio_read_buf(const void *buf, unsigned int len);
 int kvm_handle_mmio_return(struct kvm_vcpu *vcpu);
 int io_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa);
 
-void kvm_perf_init(void);
-
 #ifdef CONFIG_PERF_EVENTS
 #define __KVM_WANT_PERF_CALLBACKS
 #else
diff --git a/arch/arm64/kvm/Makefile b/arch/arm64/kvm/Makefile
index 989bb5dad2c8..0bcc378b7961 100644
--- a/arch/arm64/kvm/Makefile
+++ b/arch/arm64/kvm/Makefile
@@ -12,7 +12,7 @@  obj-$(CONFIG_KVM) += hyp/
 
 kvm-y := $(KVM)/kvm_main.o $(KVM)/coalesced_mmio.o $(KVM)/eventfd.o \
 	 $(KVM)/vfio.o $(KVM)/irqchip.o $(KVM)/binary_stats.o \
-	 arm.o mmu.o mmio.o psci.o perf.o hypercalls.o pvtime.o \
+	 arm.o mmu.o mmio.o psci.o hypercalls.o pvtime.o \
 	 inject_fault.o va_layout.o handle_exit.o \
 	 guest.o debug.o reset.o sys_regs.o \
 	 vgic-sys-reg-v3.o fpsimd.o pmu.o \
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index dfc8078dd4f9..57e637dee71d 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -1747,7 +1747,8 @@  static int init_subsystems(void)
 	if (err)
 		goto out;
 
-	kvm_perf_init();
+	kvm_pmu_init();
+
 	kvm_sys_reg_table_init();
 
 out:
diff --git a/arch/arm64/kvm/perf.c b/arch/arm64/kvm/perf.c
deleted file mode 100644
index ad9fdc2f2f70..000000000000
--- a/arch/arm64/kvm/perf.c
+++ /dev/null
@@ -1,20 +0,0 @@ 
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Based on the x86 implementation.
- *
- * Copyright (C) 2012 ARM Ltd.
- * Author: Marc Zyngier <[e-mail]>
- */
-
-#include <linux/perf_event.h>
-#include <linux/kvm_host.h>
-
-#include <asm/kvm_emulate.h>
-
-DEFINE_STATIC_KEY_FALSE(kvm_arm_pmu_available);
-
-void kvm_perf_init(void)
-{
-	if (kvm_pmu_probe_pmuver() != 0xf && !is_protected_kvm_enabled())
-		static_branch_enable(&kvm_arm_pmu_available);
-}
diff --git a/arch/arm64/kvm/pmu.c b/arch/arm64/kvm/pmu.c
index 03a6c1f4a09a..d98b57a17043 100644
--- a/arch/arm64/kvm/pmu.c
+++ b/arch/arm64/kvm/pmu.c
@@ -7,6 +7,14 @@ 
 #include <linux/perf_event.h>
 #include <asm/kvm_hyp.h>
 
+DEFINE_STATIC_KEY_FALSE(kvm_arm_pmu_available);
+
+void kvm_pmu_init(void)
+{
+	if (kvm_pmu_probe_pmuver() != 0xf && !is_protected_kvm_enabled())
+		static_branch_enable(&kvm_arm_pmu_available);
+}
+
 /*
  * Given the perf event attributes and system type, determine
  * if we are going to need to switch counters at guest entry/exit.
diff --git a/include/kvm/arm_pmu.h b/include/kvm/arm_pmu.h
index 864b9997efb2..42270676498d 100644
--- a/include/kvm/arm_pmu.h
+++ b/include/kvm/arm_pmu.h
@@ -14,6 +14,7 @@ 
 #define ARMV8_PMU_MAX_COUNTER_PAIRS	((ARMV8_PMU_MAX_COUNTERS + 1) >> 1)
 
 DECLARE_STATIC_KEY_FALSE(kvm_arm_pmu_available);
+void kvm_pmu_init(void);
 
 static __always_inline bool kvm_arm_support_pmu_v3(void)
 {