kvm_vcpu.h

  1/* SPDX-License-Identifier: GPL-2.0 */
  2/*
  3 * Copyright (C) 2020-2023 Loongson Technology Corporation Limited
  4 */
  5
  6#ifndef __ASM_LOONGARCH_KVM_VCPU_H__
  7#define __ASM_LOONGARCH_KVM_VCPU_H__
  8
  9#include <linux/kvm_host.h>
 10#include <asm/loongarch.h>
 11
 12/* Controlled by 0x5 guest estat */
 13#define CPU_SIP0			(_ULCAST_(1))
 14#define CPU_SIP1			(_ULCAST_(1) << 1)
 15#define CPU_PMU				(_ULCAST_(1) << 10)
 16#define CPU_TIMER			(_ULCAST_(1) << 11)
 17#define CPU_IPI				(_ULCAST_(1) << 12)
 18#define CPU_AVEC                        (_ULCAST_(1) << 14)
 19
 20/* Controlled by 0x52 guest exception VIP aligned to estat bit 5~12 */
 21#define CPU_IP0				(_ULCAST_(1))
 22#define CPU_IP1				(_ULCAST_(1) << 1)
 23#define CPU_IP2				(_ULCAST_(1) << 2)
 24#define CPU_IP3				(_ULCAST_(1) << 3)
 25#define CPU_IP4				(_ULCAST_(1) << 4)
 26#define CPU_IP5				(_ULCAST_(1) << 5)
 27#define CPU_IP6				(_ULCAST_(1) << 6)
 28#define CPU_IP7				(_ULCAST_(1) << 7)
 29
 30#define MNSEC_PER_SEC			(NSEC_PER_SEC >> 20)
 31
 32/* KVM_IRQ_LINE irq field index values */
 33#define KVM_LOONGSON_IRQ_TYPE_SHIFT	24
 34#define KVM_LOONGSON_IRQ_TYPE_MASK	0xff
 35#define KVM_LOONGSON_IRQ_VCPU_SHIFT	16
 36#define KVM_LOONGSON_IRQ_VCPU_MASK	0xff
 37#define KVM_LOONGSON_IRQ_NUM_SHIFT	0
 38#define KVM_LOONGSON_IRQ_NUM_MASK	0xffff
 39
 40typedef union loongarch_instruction  larch_inst;
 41typedef int (*exit_handle_fn)(struct kvm_vcpu *, int);
 42
 43int  kvm_emu_mmio_read(struct kvm_vcpu *vcpu, larch_inst inst);
 44int  kvm_emu_mmio_write(struct kvm_vcpu *vcpu, larch_inst inst);
 45int  kvm_complete_mmio_read(struct kvm_vcpu *vcpu, struct kvm_run *run);
 46int  kvm_complete_iocsr_read(struct kvm_vcpu *vcpu, struct kvm_run *run);
 47int  kvm_complete_user_service(struct kvm_vcpu *vcpu, struct kvm_run *run);
 48int  kvm_emu_idle(struct kvm_vcpu *vcpu);
 49int  kvm_pending_timer(struct kvm_vcpu *vcpu);
 50int  kvm_handle_fault(struct kvm_vcpu *vcpu, int fault);
 51void kvm_deliver_intr(struct kvm_vcpu *vcpu);
 52void kvm_deliver_exception(struct kvm_vcpu *vcpu);
 53
 54void kvm_own_fpu(struct kvm_vcpu *vcpu);
 55void kvm_lose_fpu(struct kvm_vcpu *vcpu);
 56void kvm_save_fpu(struct loongarch_fpu *fpu);
 57void kvm_restore_fpu(struct loongarch_fpu *fpu);
 58void kvm_restore_fcsr(struct loongarch_fpu *fpu);
 59
 60#ifdef CONFIG_CPU_HAS_LSX
 61int kvm_own_lsx(struct kvm_vcpu *vcpu);
 62void kvm_save_lsx(struct loongarch_fpu *fpu);
 63void kvm_restore_lsx(struct loongarch_fpu *fpu);
 64#else
 65static inline int kvm_own_lsx(struct kvm_vcpu *vcpu) { return -EINVAL; }
 66static inline void kvm_save_lsx(struct loongarch_fpu *fpu) { }
 67static inline void kvm_restore_lsx(struct loongarch_fpu *fpu) { }
 68#endif
 69
 70#ifdef CONFIG_CPU_HAS_LASX
 71int kvm_own_lasx(struct kvm_vcpu *vcpu);
 72void kvm_save_lasx(struct loongarch_fpu *fpu);
 73void kvm_restore_lasx(struct loongarch_fpu *fpu);
 74#else
 75static inline int kvm_own_lasx(struct kvm_vcpu *vcpu) { return -EINVAL; }
 76static inline void kvm_save_lasx(struct loongarch_fpu *fpu) { }
 77static inline void kvm_restore_lasx(struct loongarch_fpu *fpu) { }
 78#endif
 79
 80#ifdef CONFIG_CPU_HAS_LBT
 81int kvm_own_lbt(struct kvm_vcpu *vcpu);
 82#else
 83static inline int kvm_own_lbt(struct kvm_vcpu *vcpu) { return -EINVAL; }
 84#endif
 85
 86void kvm_init_timer(struct kvm_vcpu *vcpu, unsigned long hz);
 87void kvm_save_timer(struct kvm_vcpu *vcpu);
 88void kvm_restore_timer(struct kvm_vcpu *vcpu);
 89
 90int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq);
 91struct kvm_vcpu *kvm_get_vcpu_by_cpuid(struct kvm *kvm, int cpuid);
 92
 93/*
 94 * Loongarch KVM guest interrupt handling
 95 */
 96static inline void kvm_queue_irq(struct kvm_vcpu *vcpu, unsigned int irq)
 97{
 98	set_bit(irq, &vcpu->arch.irq_pending);
 99	clear_bit(irq, &vcpu->arch.irq_clear);
100}
101
102static inline void kvm_dequeue_irq(struct kvm_vcpu *vcpu, unsigned int irq)
103{
104	clear_bit(irq, &vcpu->arch.irq_pending);
105	set_bit(irq, &vcpu->arch.irq_clear);
106}
107
108static inline int kvm_queue_exception(struct kvm_vcpu *vcpu,
109			unsigned int code, unsigned int subcode)
110{
111	/* only one exception can be injected */
112	if (!vcpu->arch.exception_pending) {
113		set_bit(code, &vcpu->arch.exception_pending);
114		vcpu->arch.esubcode = subcode;
115		return 0;
116	} else
117		return -1;
118}
119
120static inline unsigned long kvm_read_reg(struct kvm_vcpu *vcpu, int num)
121{
122	return vcpu->arch.gprs[num];
123}
124
125static inline void kvm_write_reg(struct kvm_vcpu *vcpu, int num, unsigned long val)
126{
127	vcpu->arch.gprs[num] = val;
128}
129
130static inline bool kvm_pvtime_supported(void)
131{
132	return !!sched_info_on();
133}
134
135static inline bool kvm_guest_has_pv_feature(struct kvm_vcpu *vcpu, unsigned int feature)
136{
137	return vcpu->kvm->arch.pv_features & BIT(feature);
138}
139
140#endif /* __ASM_LOONGARCH_KVM_VCPU_H__ */