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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/powerpc/kvm/timing.h
10817 views
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/*

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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: Christian Ehrhardt <[email protected]>

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 */

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#ifndef __POWERPC_KVM_EXITTIMING_H__

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#define __POWERPC_KVM_EXITTIMING_H__

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#include <linux/kvm_host.h>

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#include <asm/kvm_host.h>

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#ifdef CONFIG_KVM_EXIT_TIMING

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void kvmppc_init_timing_stats(struct kvm_vcpu *vcpu);

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void kvmppc_update_timing_stats(struct kvm_vcpu *vcpu);

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void kvmppc_create_vcpu_debugfs(struct kvm_vcpu *vcpu, unsigned int id);

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void kvmppc_remove_vcpu_debugfs(struct kvm_vcpu *vcpu);

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static inline void kvmppc_set_exit_type(struct kvm_vcpu *vcpu, int type)

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{

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	vcpu->arch.last_exit_type = type;

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}

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#else

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/* if exit timing is not configured there is no need to build the c file */

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static inline void kvmppc_init_timing_stats(struct kvm_vcpu *vcpu) {}

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static inline void kvmppc_update_timing_stats(struct kvm_vcpu *vcpu) {}

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static inline void kvmppc_create_vcpu_debugfs(struct kvm_vcpu *vcpu,

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						unsigned int id) {}

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static inline void kvmppc_remove_vcpu_debugfs(struct kvm_vcpu *vcpu) {}

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static inline void kvmppc_set_exit_type(struct kvm_vcpu *vcpu, int type) {}

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#endif /* CONFIG_KVM_EXIT_TIMING */

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/* account the exit in kvm_stats */

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static inline void kvmppc_account_exit_stat(struct kvm_vcpu *vcpu, int type)

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{

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	/* type has to be known at build time for optimization */

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	/* The BUILD_BUG_ON below breaks in funny ways, commented out

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	 * for now ... -BenH

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	BUILD_BUG_ON(!__builtin_constant_p(type));

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	*/

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	switch (type) {

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	case EXT_INTR_EXITS:

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		vcpu->stat.ext_intr_exits++;

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		break;

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	case DEC_EXITS:

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		vcpu->stat.dec_exits++;

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		break;

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	case EMULATED_INST_EXITS:

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		vcpu->stat.emulated_inst_exits++;

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		break;

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	case DCR_EXITS:

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		vcpu->stat.dcr_exits++;

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		break;

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	case DSI_EXITS:

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		vcpu->stat.dsi_exits++;

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		break;

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	case ISI_EXITS:

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		vcpu->stat.isi_exits++;

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		break;

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	case SYSCALL_EXITS:

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		vcpu->stat.syscall_exits++;

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		break;

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	case DTLB_REAL_MISS_EXITS:

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		vcpu->stat.dtlb_real_miss_exits++;

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		break;

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	case DTLB_VIRT_MISS_EXITS:

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		vcpu->stat.dtlb_virt_miss_exits++;

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		break;

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	case MMIO_EXITS:

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		vcpu->stat.mmio_exits++;

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		break;

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	case ITLB_REAL_MISS_EXITS:

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		vcpu->stat.itlb_real_miss_exits++;

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		break;

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	case ITLB_VIRT_MISS_EXITS:

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		vcpu->stat.itlb_virt_miss_exits++;

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		break;

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	case SIGNAL_EXITS:

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		vcpu->stat.signal_exits++;

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		break;

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	}

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}

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/* wrapper to set exit time and account for it in kvm_stats */

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static inline void kvmppc_account_exit(struct kvm_vcpu *vcpu, int type)

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{

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	kvmppc_set_exit_type(vcpu, type);

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	kvmppc_account_exit_stat(vcpu, type);

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}

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#endif /* __POWERPC_KVM_EXITTIMING_H__ */

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