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
40 typedef union loongarch_instruction larch_inst;
41 typedef int (*exit_handle_fn)(struct kvm_vcpu *, int);
42
43 int kvm_emu_mmio_read(struct kvm_vcpu *vcpu, larch_inst inst);
44 int kvm_emu_mmio_write(struct kvm_vcpu *vcpu, larch_inst inst);
45 int kvm_complete_mmio_read(struct kvm_vcpu *vcpu, struct kvm_run *run);
46 int kvm_complete_iocsr_read(struct kvm_vcpu *vcpu, struct kvm_run *run);
47 int kvm_complete_user_service(struct kvm_vcpu *vcpu, struct kvm_run *run);
48 int kvm_emu_idle(struct kvm_vcpu *vcpu);
49 int kvm_pending_timer(struct kvm_vcpu *vcpu);
50 int kvm_handle_fault(struct kvm_vcpu *vcpu, int fault);
51 void kvm_deliver_intr(struct kvm_vcpu *vcpu);
52 void kvm_deliver_exception(struct kvm_vcpu *vcpu);
53
54 void kvm_own_fpu(struct kvm_vcpu *vcpu);
55 void kvm_lose_fpu(struct kvm_vcpu *vcpu);
56 void kvm_save_fpu(struct loongarch_fpu *fpu);
57 void kvm_restore_fpu(struct loongarch_fpu *fpu);
58 void kvm_restore_fcsr(struct loongarch_fpu *fpu);
59
60 #ifdef CONFIG_CPU_HAS_LSX
61 int kvm_own_lsx(struct kvm_vcpu *vcpu);
62 void kvm_save_lsx(struct loongarch_fpu *fpu);
63 void kvm_restore_lsx(struct loongarch_fpu *fpu);
64 #else
kvm_own_lsx(struct kvm_vcpu * vcpu)65 static inline int kvm_own_lsx(struct kvm_vcpu *vcpu) { return -EINVAL; }
kvm_save_lsx(struct loongarch_fpu * fpu)66 static inline void kvm_save_lsx(struct loongarch_fpu *fpu) { }
kvm_restore_lsx(struct loongarch_fpu * fpu)67 static inline void kvm_restore_lsx(struct loongarch_fpu *fpu) { }
68 #endif
69
70 #ifdef CONFIG_CPU_HAS_LASX
71 int kvm_own_lasx(struct kvm_vcpu *vcpu);
72 void kvm_save_lasx(struct loongarch_fpu *fpu);
73 void kvm_restore_lasx(struct loongarch_fpu *fpu);
74 #else
kvm_own_lasx(struct kvm_vcpu * vcpu)75 static inline int kvm_own_lasx(struct kvm_vcpu *vcpu) { return -EINVAL; }
kvm_save_lasx(struct loongarch_fpu * fpu)76 static inline void kvm_save_lasx(struct loongarch_fpu *fpu) { }
kvm_restore_lasx(struct loongarch_fpu * fpu)77 static inline void kvm_restore_lasx(struct loongarch_fpu *fpu) { }
78 #endif
79
80 #ifdef CONFIG_CPU_HAS_LBT
81 int kvm_own_lbt(struct kvm_vcpu *vcpu);
82 #else
kvm_own_lbt(struct kvm_vcpu * vcpu)83 static inline int kvm_own_lbt(struct kvm_vcpu *vcpu) { return -EINVAL; }
84 #endif
85
86 void kvm_init_timer(struct kvm_vcpu *vcpu, unsigned long hz);
87 void kvm_save_timer(struct kvm_vcpu *vcpu);
88 void kvm_restore_timer(struct kvm_vcpu *vcpu);
89
90 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq);
91 struct kvm_vcpu *kvm_get_vcpu_by_cpuid(struct kvm *kvm, int cpuid);
92
93 /*
94 * Loongarch KVM guest interrupt handling
95 */
kvm_queue_irq(struct kvm_vcpu * vcpu,unsigned int irq)96 static 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
kvm_dequeue_irq(struct kvm_vcpu * vcpu,unsigned int irq)102 static 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
kvm_queue_exception(struct kvm_vcpu * vcpu,unsigned int code,unsigned int subcode)108 static 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
kvm_read_reg(struct kvm_vcpu * vcpu,int num)120 static inline unsigned long kvm_read_reg(struct kvm_vcpu *vcpu, int num)
121 {
122 return vcpu->arch.gprs[num];
123 }
124
kvm_write_reg(struct kvm_vcpu * vcpu,int num,unsigned long val)125 static inline void kvm_write_reg(struct kvm_vcpu *vcpu, int num, unsigned long val)
126 {
127 vcpu->arch.gprs[num] = val;
128 }
129
kvm_pvtime_supported(void)130 static inline bool kvm_pvtime_supported(void)
131 {
132 return !!sched_info_on();
133 }
134
kvm_guest_has_pv_feature(struct kvm_vcpu * vcpu,unsigned int feature)135 static 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__ */
141