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 19 /* Controlled by 0x52 guest exception VIP aligned to estat bit 5~12 */ 20 #define CPU_IP0 (_ULCAST_(1)) 21 #define CPU_IP1 (_ULCAST_(1) << 1) 22 #define CPU_IP2 (_ULCAST_(1) << 2) 23 #define CPU_IP3 (_ULCAST_(1) << 3) 24 #define CPU_IP4 (_ULCAST_(1) << 4) 25 #define CPU_IP5 (_ULCAST_(1) << 5) 26 #define CPU_IP6 (_ULCAST_(1) << 6) 27 #define CPU_IP7 (_ULCAST_(1) << 7) 28 29 #define MNSEC_PER_SEC (NSEC_PER_SEC >> 20) 30 31 /* KVM_IRQ_LINE irq field index values */ 32 #define KVM_LOONGSON_IRQ_TYPE_SHIFT 24 33 #define KVM_LOONGSON_IRQ_TYPE_MASK 0xff 34 #define KVM_LOONGSON_IRQ_VCPU_SHIFT 16 35 #define KVM_LOONGSON_IRQ_VCPU_MASK 0xff 36 #define KVM_LOONGSON_IRQ_NUM_SHIFT 0 37 #define KVM_LOONGSON_IRQ_NUM_MASK 0xffff 38 39 typedef union loongarch_instruction larch_inst; 40 typedef int (*exit_handle_fn)(struct kvm_vcpu *); 41 42 int kvm_emu_mmio_read(struct kvm_vcpu *vcpu, larch_inst inst); 43 int kvm_emu_mmio_write(struct kvm_vcpu *vcpu, larch_inst inst); 44 int kvm_complete_mmio_read(struct kvm_vcpu *vcpu, struct kvm_run *run); 45 int kvm_complete_iocsr_read(struct kvm_vcpu *vcpu, struct kvm_run *run); 46 int kvm_emu_idle(struct kvm_vcpu *vcpu); 47 int kvm_pending_timer(struct kvm_vcpu *vcpu); 48 int kvm_handle_fault(struct kvm_vcpu *vcpu, int fault); 49 void kvm_deliver_intr(struct kvm_vcpu *vcpu); 50 void kvm_deliver_exception(struct kvm_vcpu *vcpu); 51 52 void kvm_own_fpu(struct kvm_vcpu *vcpu); 53 void kvm_lose_fpu(struct kvm_vcpu *vcpu); 54 void kvm_save_fpu(struct loongarch_fpu *fpu); 55 void kvm_restore_fpu(struct loongarch_fpu *fpu); 56 void kvm_restore_fcsr(struct loongarch_fpu *fpu); 57 58 #ifdef CONFIG_CPU_HAS_LSX 59 int kvm_own_lsx(struct kvm_vcpu *vcpu); 60 void kvm_save_lsx(struct loongarch_fpu *fpu); 61 void kvm_restore_lsx(struct loongarch_fpu *fpu); 62 #else 63 static inline int kvm_own_lsx(struct kvm_vcpu *vcpu) { return -EINVAL; } 64 static inline void kvm_save_lsx(struct loongarch_fpu *fpu) { } 65 static inline void kvm_restore_lsx(struct loongarch_fpu *fpu) { } 66 #endif 67 68 #ifdef CONFIG_CPU_HAS_LASX 69 int kvm_own_lasx(struct kvm_vcpu *vcpu); 70 void kvm_save_lasx(struct loongarch_fpu *fpu); 71 void kvm_restore_lasx(struct loongarch_fpu *fpu); 72 #else 73 static inline int kvm_own_lasx(struct kvm_vcpu *vcpu) { return -EINVAL; } 74 static inline void kvm_save_lasx(struct loongarch_fpu *fpu) { } 75 static inline void kvm_restore_lasx(struct loongarch_fpu *fpu) { } 76 #endif 77 78 void kvm_init_timer(struct kvm_vcpu *vcpu, unsigned long hz); 79 void kvm_reset_timer(struct kvm_vcpu *vcpu); 80 void kvm_save_timer(struct kvm_vcpu *vcpu); 81 void kvm_restore_timer(struct kvm_vcpu *vcpu); 82 83 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq); 84 struct kvm_vcpu *kvm_get_vcpu_by_cpuid(struct kvm *kvm, int cpuid); 85 86 /* 87 * Loongarch KVM guest interrupt handling 88 */ 89 static inline void kvm_queue_irq(struct kvm_vcpu *vcpu, unsigned int irq) 90 { 91 set_bit(irq, &vcpu->arch.irq_pending); 92 clear_bit(irq, &vcpu->arch.irq_clear); 93 } 94 95 static inline void kvm_dequeue_irq(struct kvm_vcpu *vcpu, unsigned int irq) 96 { 97 clear_bit(irq, &vcpu->arch.irq_pending); 98 set_bit(irq, &vcpu->arch.irq_clear); 99 } 100 101 static inline int kvm_queue_exception(struct kvm_vcpu *vcpu, 102 unsigned int code, unsigned int subcode) 103 { 104 /* only one exception can be injected */ 105 if (!vcpu->arch.exception_pending) { 106 set_bit(code, &vcpu->arch.exception_pending); 107 vcpu->arch.esubcode = subcode; 108 return 0; 109 } else 110 return -1; 111 } 112 113 static inline unsigned long kvm_read_reg(struct kvm_vcpu *vcpu, int num) 114 { 115 return vcpu->arch.gprs[num]; 116 } 117 118 static inline void kvm_write_reg(struct kvm_vcpu *vcpu, int num, unsigned long val) 119 { 120 vcpu->arch.gprs[num] = val; 121 } 122 123 #endif /* __ASM_LOONGARCH_KVM_VCPU_H__ */ 124