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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
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License, version 2, as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Copyright IBM Corp. 2008
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*
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* Authors: Hollis Blanchard <hollisb@us.ibm.com>
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*/
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#ifndef __KVM_BOOKE_H__
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#define __KVM_BOOKE_H__
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#include <linux/types.h>
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#include <linux/kvm_host.h>
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#include "timing.h"
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/* interrupt priortity ordering */
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#define BOOKE_IRQPRIO_DATA_STORAGE 0
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#define BOOKE_IRQPRIO_INST_STORAGE 1
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#define BOOKE_IRQPRIO_ALIGNMENT 2
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#define BOOKE_IRQPRIO_PROGRAM 3
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#define BOOKE_IRQPRIO_FP_UNAVAIL 4
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#define BOOKE_IRQPRIO_SYSCALL 5
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#define BOOKE_IRQPRIO_AP_UNAVAIL 6
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#define BOOKE_IRQPRIO_DTLB_MISS 7
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#define BOOKE_IRQPRIO_ITLB_MISS 8
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#define BOOKE_IRQPRIO_MACHINE_CHECK 9
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#define BOOKE_IRQPRIO_DEBUG 10
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#define BOOKE_IRQPRIO_CRITICAL 11
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#define BOOKE_IRQPRIO_WATCHDOG 12
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#define BOOKE_IRQPRIO_EXTERNAL 13
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#define BOOKE_IRQPRIO_FIT 14
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#define BOOKE_IRQPRIO_DECREMENTER 15
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/* Helper function for "full" MSR writes. No need to call this if only EE is
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* changing. */
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static inline void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr)
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{
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if ((new_msr & MSR_PR) != (vcpu->arch.msr & MSR_PR))
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kvmppc_mmu_priv_switch(vcpu, new_msr & MSR_PR);
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vcpu->arch.msr = new_msr;
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if (vcpu->arch.msr & MSR_WE) {
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kvm_vcpu_block(vcpu);
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kvmppc_set_exit_type(vcpu, EMULATED_MTMSRWE_EXITS);
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};
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}
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#endif /* __KVM_BOOKE_H__ */
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