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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/s390/kvm/kvm-s390.h
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/*

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 * kvm_s390.h -  definition for kvm on s390

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 *

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 * Copyright IBM Corp. 2008,2009

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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 only)

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 * as published by the Free Software Foundation.

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 *

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 *    Author(s): Carsten Otte <[email protected]>

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 *               Christian Borntraeger <[email protected]>

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 *               Christian Ehrhardt <[email protected]>

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 */

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#ifndef ARCH_S390_KVM_S390_H

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#define ARCH_S390_KVM_S390_H

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#include <linux/hrtimer.h>

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#include <linux/kvm.h>

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#include <linux/kvm_host.h>

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/* The current code can have up to 256 pages for virtio */

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#define VIRTIODESCSPACE (256ul * 4096ul)

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typedef int (*intercept_handler_t)(struct kvm_vcpu *vcpu);

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/* negativ values are error codes, positive values for internal conditions */

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#define SIE_INTERCEPT_RERUNVCPU		(1<<0)

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int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu);

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#define VM_EVENT(d_kvm, d_loglevel, d_string, d_args...)\

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do { \

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	debug_sprintf_event(d_kvm->arch.dbf, d_loglevel, d_string "\n", \

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	  d_args); \

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} while (0)

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#define VCPU_EVENT(d_vcpu, d_loglevel, d_string, d_args...)\

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do { \

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	debug_sprintf_event(d_vcpu->kvm->arch.dbf, d_loglevel, \

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	  "%02d[%016lx-%016lx]: " d_string "\n", d_vcpu->vcpu_id, \

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	  d_vcpu->arch.sie_block->gpsw.mask, d_vcpu->arch.sie_block->gpsw.addr,\

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	  d_args); \

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} while (0)

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static inline int __cpu_is_stopped(struct kvm_vcpu *vcpu)

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{

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	return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOP_INT;

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}

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int kvm_s390_handle_wait(struct kvm_vcpu *vcpu);

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enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer);

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void kvm_s390_tasklet(unsigned long parm);

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void kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu);

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int kvm_s390_inject_vm(struct kvm *kvm,

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		struct kvm_s390_interrupt *s390int);

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int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,

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		struct kvm_s390_interrupt *s390int);

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int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code);

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int kvm_s390_inject_sigp_stop(struct kvm_vcpu *vcpu, int action);

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static inline long kvm_s390_vcpu_get_memsize(struct kvm_vcpu *vcpu)

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{

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	return vcpu->arch.sie_block->gmslm

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		- vcpu->arch.sie_block->gmsor

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		- VIRTIODESCSPACE + 1ul;

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}

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static inline void kvm_s390_vcpu_set_mem(struct kvm_vcpu *vcpu)

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{

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	int idx;

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	struct kvm_memory_slot *mem;

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	struct kvm_memslots *memslots;

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	idx = srcu_read_lock(&vcpu->kvm->srcu);

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	memslots = kvm_memslots(vcpu->kvm);

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	mem = &memslots->memslots[0];

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	vcpu->arch.sie_block->gmsor = mem->userspace_addr;

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	vcpu->arch.sie_block->gmslm =

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		mem->userspace_addr +

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		(mem->npages << PAGE_SHIFT) +

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		VIRTIODESCSPACE - 1ul;

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	srcu_read_unlock(&vcpu->kvm->srcu, idx);

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}

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/* implemented in priv.c */

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int kvm_s390_handle_b2(struct kvm_vcpu *vcpu);

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/* implemented in sigp.c */

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int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu);

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/* implemented in kvm-s390.c */

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int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu,

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				 unsigned long addr);

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/* implemented in diag.c */

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int kvm_s390_handle_diag(struct kvm_vcpu *vcpu);

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#endif

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