69 lines
1.5 KiB
C
69 lines
1.5 KiB
C
|
/*
|
||
|
|
* Based on the x86 implementation.
|
||
|
|
*
|
||
|
|
* Copyright (C) 2012 ARM Ltd.
|
||
|
|
* Author: Marc Zyngier <marc.zyngier@arm.com>
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License version 2 as
|
||
|
|
* published by the Free Software Foundation.
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope that it will be useful,
|
||
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
* GNU General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License
|
||
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#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);
|
||
|
|
}
|