73e75b416f
Existing KVM statistics are either just counters (kvm_stat) reported for KVM generally or trace based aproaches like kvm_trace. For KVM on powerpc we had the need to track the timings of the different exit types. While this could be achieved parsing data created with a kvm_trace extension this adds too much overhead (at least on embedded PowerPC) slowing down the workloads we wanted to measure. Therefore this patch adds a in-kernel exit timing statistic to the powerpc kvm code. These statistic is available per vm&vcpu under the kvm debugfs directory. As this statistic is low, but still some overhead it can be enabled via a .config entry and should be off by default. Since this patch touched all powerpc kvm_stat code anyway this code is now merged and simplified together with the exit timing statistic code (still working with exit timing disabled in .config). Signed-off-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com> Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com> Signed-off-by: Avi Kivity <avi@redhat.com>
61 lines
1.8 KiB
C
61 lines
1.8 KiB
C
/*
|
|
* 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, write to the Free Software
|
|
* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
*
|
|
* Copyright IBM Corp. 2008
|
|
*
|
|
* Authors: Hollis Blanchard <hollisb@us.ibm.com>
|
|
*/
|
|
|
|
#ifndef __KVM_BOOKE_H__
|
|
#define __KVM_BOOKE_H__
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/kvm_host.h>
|
|
#include "timing.h"
|
|
|
|
/* interrupt priortity ordering */
|
|
#define BOOKE_IRQPRIO_DATA_STORAGE 0
|
|
#define BOOKE_IRQPRIO_INST_STORAGE 1
|
|
#define BOOKE_IRQPRIO_ALIGNMENT 2
|
|
#define BOOKE_IRQPRIO_PROGRAM 3
|
|
#define BOOKE_IRQPRIO_FP_UNAVAIL 4
|
|
#define BOOKE_IRQPRIO_SYSCALL 5
|
|
#define BOOKE_IRQPRIO_AP_UNAVAIL 6
|
|
#define BOOKE_IRQPRIO_DTLB_MISS 7
|
|
#define BOOKE_IRQPRIO_ITLB_MISS 8
|
|
#define BOOKE_IRQPRIO_MACHINE_CHECK 9
|
|
#define BOOKE_IRQPRIO_DEBUG 10
|
|
#define BOOKE_IRQPRIO_CRITICAL 11
|
|
#define BOOKE_IRQPRIO_WATCHDOG 12
|
|
#define BOOKE_IRQPRIO_EXTERNAL 13
|
|
#define BOOKE_IRQPRIO_FIT 14
|
|
#define BOOKE_IRQPRIO_DECREMENTER 15
|
|
|
|
/* Helper function for "full" MSR writes. No need to call this if only EE is
|
|
* changing. */
|
|
static inline void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr)
|
|
{
|
|
if ((new_msr & MSR_PR) != (vcpu->arch.msr & MSR_PR))
|
|
kvmppc_mmu_priv_switch(vcpu, new_msr & MSR_PR);
|
|
|
|
vcpu->arch.msr = new_msr;
|
|
|
|
if (vcpu->arch.msr & MSR_WE) {
|
|
kvm_vcpu_block(vcpu);
|
|
kvmppc_set_exit_type(vcpu, EMULATED_MTMSRWE_EXITS);
|
|
};
|
|
}
|
|
|
|
#endif /* __KVM_BOOKE_H__ */
|