forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
59 lines
1.0 KiB
59 lines
1.0 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
|
* Based on the x86 implementation. |
|
* |
|
* Copyright (C) 2012 ARM Ltd. |
|
* Author: Marc Zyngier <[email protected]> |
|
*/ |
|
|
|
#include <linux/perf_event.h> |
|
#include <linux/kvm_host.h> |
|
|
|
#include <asm/kvm_emulate.h> |
|
|
|
DEFINE_STATIC_KEY_FALSE(kvm_arm_pmu_available); |
|
|
|
static int kvm_is_in_guest(void) |
|
{ |
|
return kvm_get_running_vcpu() != NULL; |
|
} |
|
|
|
static int kvm_is_user_mode(void) |
|
{ |
|
struct kvm_vcpu *vcpu; |
|
|
|
vcpu = kvm_get_running_vcpu(); |
|
|
|
if (vcpu) |
|
return !vcpu_mode_priv(vcpu); |
|
|
|
return 0; |
|
} |
|
|
|
static unsigned long kvm_get_guest_ip(void) |
|
{ |
|
struct kvm_vcpu *vcpu; |
|
|
|
vcpu = kvm_get_running_vcpu(); |
|
|
|
if (vcpu) |
|
return *vcpu_pc(vcpu); |
|
|
|
return 0; |
|
} |
|
|
|
static struct perf_guest_info_callbacks kvm_guest_cbs = { |
|
.is_in_guest = kvm_is_in_guest, |
|
.is_user_mode = kvm_is_user_mode, |
|
.get_guest_ip = kvm_get_guest_ip, |
|
}; |
|
|
|
int kvm_perf_init(void) |
|
{ |
|
return perf_register_guest_info_callbacks(&kvm_guest_cbs); |
|
} |
|
|
|
int kvm_perf_teardown(void) |
|
{ |
|
return perf_unregister_guest_info_callbacks(&kvm_guest_cbs); |
|
}
|
|
|