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KVM: arm64: Drop perf.c and fold its tiny bits of code into arm.c

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Call KVM's (un)register perf callbacks helpers directly from arm.c and
delete perf.c

No functional change intended.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20211111020738.2512932-17-seanjc@google.com
This commit is contained in:
Sean Christopherson 2021-11-11 02:07:37 +00:00 committed by Peter Zijlstra
parent be399d824b
commit 17ed14eba2
4 changed files with 4 additions and 28 deletions
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3
arch/arm64/include/asm/kvm_host.h
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@ -675,9 +675,6 @@ 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);
void kvm_perf_teardown(void);
/*
* Returns true if a Performance Monitoring Interrupt (PMI), a.k.a. perf event,
* arrived in guest context. For arm64, any event that arrives while a vCPU is

2
arch/arm64/kvm/Makefile
View File

@ -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 \

5
arch/arm64/kvm/arm.c
View File

@ -1773,7 +1773,8 @@ static int init_subsystems(void)
if (err)
goto out;
kvm_perf_init();
kvm_register_perf_callbacks(NULL);
kvm_sys_reg_table_init();
out:
@ -2161,7 +2162,7 @@ out_err:
/* NOP: Compiling as a module not supported */
void kvm_arch_exit(void)
{
kvm_perf_teardown();
kvm_unregister_perf_callbacks();
}
static int __init early_kvm_mode_cfg(char *arg)

22
arch/arm64/kvm/perf.c
View File

@ -1,22 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Based on the x86 implementation.
*
* Copyright (C) 2012 ARM Ltd.
* Author: Marc Zyngier <marc.zyngier@arm.com>
*/
#include <linux/perf_event.h>
#include <linux/kvm_host.h>
#include <asm/kvm_emulate.h>
void kvm_perf_init(void)
{
kvm_register_perf_callbacks(NULL);
}
void kvm_perf_teardown(void)
{
kvm_unregister_perf_callbacks();
}