diff options
Diffstat (limited to 'arch/loongarch/include/asm/kvm_vcpu.h')
| -rw-r--r-- | arch/loongarch/include/asm/kvm_vcpu.h | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/arch/loongarch/include/asm/kvm_vcpu.h b/arch/loongarch/include/asm/kvm_vcpu.h new file mode 100644 index 000000000000..0cb4fdb8a9b5 --- /dev/null +++ b/arch/loongarch/include/asm/kvm_vcpu.h @@ -0,0 +1,112 @@ +/* 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_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 + +void kvm_init_timer(struct kvm_vcpu *vcpu, unsigned long hz); +void kvm_reset_timer(struct kvm_vcpu *vcpu); +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); + +/* + * 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; +} + +#endif /* __ASM_LOONGARCH_KVM_VCPU_H__ */ |