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 static inline bool kvm_pvtime_supported(void)
124 {
125 return !!sched_info_on();
126 }
127
128 #endif /* __ASM_LOONGARCH_KVM_VCPU_H__ */
129
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