blob: 918cdc3839ea52b93525d564d0ab7b5542a679e7 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
// 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>
static int kvm_is_in_guest(void)
{
return kvm_arm_get_running_vcpu() != NULL;
}
static int kvm_is_user_mode(void)
{
struct kvm_vcpu *vcpu;
vcpu = kvm_arm_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_arm_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);
}
|
