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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2020-2023 Loongson Technology Corporation Limited
*/
#ifndef __ASM_LOONGARCH_KVM_VCPU_H__
#define __ASM_LOONGARCH_KVM_VCPU_H__
#include <linux/kvm_host.h>
#include <asm/loongarch.h>
/* Controlled by 0x5 guest estat */
#define CPU_SIP0 (_ULCAST_(1))
#define CPU_SIP1 (_ULCAST_(1) << 1)
#define CPU_PMU (_ULCAST_(1) << 10)
#define CPU_TIMER (_ULCAST_(1) << 11)
#define CPU_IPI (_ULCAST_(1) << 12)
/* Controlled by 0x52 guest exception VIP aligned to estat bit 5~12 */
#define CPU_IP0 (_ULCAST_(1))
#define CPU_IP1 (_ULCAST_(1) << 1)
#define CPU_IP2 (_ULCAST_(1) << 2)
#define CPU_IP3 (_ULCAST_(1) << 3)
#define CPU_IP4 (_ULCAST_(1) << 4)
#define CPU_IP5 (_ULCAST_(1) << 5)
#define CPU_IP6 (_ULCAST_(1) << 6)
#define CPU_IP7 (_ULCAST_(1) << 7)
#define MNSEC_PER_SEC (NSEC_PER_SEC >> 20)
/* KVM_IRQ_LINE irq field index values */
#define KVM_LOONGSON_IRQ_TYPE_SHIFT 24
#define KVM_LOONGSON_IRQ_TYPE_MASK 0xff
#define KVM_LOONGSON_IRQ_VCPU_SHIFT 16
#define KVM_LOONGSON_IRQ_VCPU_MASK 0xff
#define KVM_LOONGSON_IRQ_NUM_SHIFT 0
#define KVM_LOONGSON_IRQ_NUM_MASK 0xffff
typedef union loongarch_instruction larch_inst;
typedef int (*exit_handle_fn)(struct kvm_vcpu *);
int kvm_emu_mmio_read(struct kvm_vcpu *vcpu, larch_inst inst);
int kvm_emu_mmio_write(struct kvm_vcpu *vcpu, larch_inst inst);
int kvm_complete_mmio_read(struct kvm_vcpu *vcpu, struct kvm_run *run);
int kvm_complete_iocsr_read(struct kvm_vcpu *vcpu, struct kvm_run *run);
int kvm_complete_user_service(struct kvm_vcpu *vcpu, struct kvm_run *run);
int kvm_emu_idle(struct kvm_vcpu *vcpu);
int kvm_pending_timer(struct kvm_vcpu *vcpu);
int kvm_handle_fault(struct kvm_vcpu *vcpu, int fault);
void kvm_deliver_intr(struct kvm_vcpu *vcpu);
void kvm_deliver_exception(struct kvm_vcpu *vcpu);
void kvm_own_fpu(struct kvm_vcpu *vcpu);
void kvm_lose_fpu(struct kvm_vcpu *vcpu);
void kvm_save_fpu(struct loongarch_fpu *fpu);
void kvm_restore_fpu(struct loongarch_fpu *fpu);
void kvm_restore_fcsr(struct loongarch_fpu *fpu);
#ifdef CONFIG_CPU_HAS_LSX
int kvm_own_lsx(struct kvm_vcpu *vcpu);
void kvm_save_lsx(struct loongarch_fpu *fpu);
void kvm_restore_lsx(struct loongarch_fpu *fpu);
#else
static inline int kvm_own_lsx(struct kvm_vcpu *vcpu) { return -EINVAL; }
static inline void kvm_save_lsx(struct loongarch_fpu *fpu) { }
static inline void kvm_restore_lsx(struct loongarch_fpu *fpu) { }
#endif
#ifdef CONFIG_CPU_HAS_LASX
int kvm_own_lasx(struct kvm_vcpu *vcpu);
void kvm_save_lasx(struct loongarch_fpu *fpu);
void kvm_restore_lasx(struct loongarch_fpu *fpu);
#else
static inline int kvm_own_lasx(struct kvm_vcpu *vcpu) { return -EINVAL; }
static inline void kvm_save_lasx(struct loongarch_fpu *fpu) { }
static inline void kvm_restore_lasx(struct loongarch_fpu *fpu) { }
#endif
#ifdef CONFIG_CPU_HAS_LBT
int kvm_own_lbt(struct kvm_vcpu *vcpu);
#else
static inline int kvm_own_lbt(struct kvm_vcpu *vcpu) { return -EINVAL; }
#endif
void kvm_init_timer(struct kvm_vcpu *vcpu, unsigned long hz);
void kvm_save_timer(struct kvm_vcpu *vcpu);
void kvm_restore_timer(struct kvm_vcpu *vcpu);
int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq);
struct kvm_vcpu *kvm_get_vcpu_by_cpuid(struct kvm *kvm, int cpuid);
/*
* Loongarch KVM guest interrupt handling
*/
static inline void kvm_queue_irq(struct kvm_vcpu *vcpu, unsigned int irq)
{
set_bit(irq, &vcpu->arch.irq_pending);
clear_bit(irq, &vcpu->arch.irq_clear);
}
static inline void kvm_dequeue_irq(struct kvm_vcpu *vcpu, unsigned int irq)
{
clear_bit(irq, &vcpu->arch.irq_pending);
set_bit(irq, &vcpu->arch.irq_clear);
}
static inline int kvm_queue_exception(struct kvm_vcpu *vcpu,
unsigned int code, unsigned int subcode)
{
/* only one exception can be injected */
if (!vcpu->arch.exception_pending) {
set_bit(code, &vcpu->arch.exception_pending);
vcpu->arch.esubcode = subcode;
return 0;
} else
return -1;
}
static inline unsigned long kvm_read_reg(struct kvm_vcpu *vcpu, int num)
{
return vcpu->arch.gprs[num];
}
static inline void kvm_write_reg(struct kvm_vcpu *vcpu, int num, unsigned long val)
{
vcpu->arch.gprs[num] = val;
}
static inline bool kvm_pvtime_supported(void)
{
return !!sched_info_on();
}
static inline bool kvm_guest_has_pv_feature(struct kvm_vcpu *vcpu, unsigned int feature)
{
return vcpu->kvm->arch.pv_features & BIT(feature);
}
#endif /* __ASM_LOONGARCH_KVM_VCPU_H__ */
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