1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
4 */
5
6 #ifndef __ASM_LOONGARCH_KVMCPU_H__
7 #define __ASM_LOONGARCH_KVMCPU_H__
8
9 #include <linux/kvm_host.h>
10 #include <asm/kvm_host.h>
11
12 #define LARCH_INT_SIP0 0
13 #define LARCH_INT_SIP1 1
14 #define LARCH_INT_IP0 2
15 #define LARCH_INT_IP1 3
16 #define LARCH_INT_IP2 4
17 #define LARCH_INT_IP3 5
18 #define LARCH_INT_IP4 6
19 #define LARCH_INT_IP5 7
20 #define LARCH_INT_IP6 8
21 #define LARCH_INT_IP7 9
22 #define LARCH_INT_PMU 10
23 #define LARCH_INT_TIMER 11
24 #define LARCH_INT_IPI 12
25 #define LOONGARCH_EXC_MAX (LARCH_INT_IPI + 1)
26 #define LOONGARCH_EXC_IPNUM (LOONGARCH_EXC_MAX)
27
28 /* Controlled by 0x5 guest exst */
29 #define CPU_SIP0 (_ULCAST_(1))
30 #define CPU_SIP1 (_ULCAST_(1) << 1)
31 #define CPU_PMU (_ULCAST_(1) << 10)
32 #define CPU_TIMER (_ULCAST_(1) << 11)
33 #define CPU_IPI (_ULCAST_(1) << 12)
34
35 /* Controlled by 0x52 guest exception VIP
36 * aligned to exst bit 5~12
37 */
38 #define CPU_IP0 (_ULCAST_(1))
39 #define CPU_IP1 (_ULCAST_(1) << 1)
40 #define CPU_IP2 (_ULCAST_(1) << 2)
41 #define CPU_IP3 (_ULCAST_(1) << 3)
42 #define CPU_IP4 (_ULCAST_(1) << 4)
43 #define CPU_IP5 (_ULCAST_(1) << 5)
44 #define CPU_IP6 (_ULCAST_(1) << 6)
45 #define CPU_IP7 (_ULCAST_(1) << 7)
46
47 #define MNSEC_PER_SEC (NSEC_PER_SEC >> 20)
48
49 /* KVM_IRQ_LINE irq field index values */
50 #define KVM_LOONGSON_IRQ_TYPE_SHIFT 24
51 #define KVM_LOONGSON_IRQ_TYPE_MASK 0xff
52 #define KVM_LOONGSON_IRQ_VCPU_SHIFT 16
53 #define KVM_LOONGSON_IRQ_VCPU_MASK 0xff
54 #define KVM_LOONGSON_IRQ_NUM_SHIFT 0
55 #define KVM_LOONGSON_IRQ_NUM_MASK 0xffff
56
57 /* irq_type field */
58 #define KVM_LOONGSON_IRQ_TYPE_CPU_IP 0
59 #define KVM_LOONGSON_IRQ_TYPE_CPU_IO 1
60 #define KVM_LOONGSON_IRQ_TYPE_HT 2
61 #define KVM_LOONGSON_IRQ_TYPE_MSI 3
62 #define KVM_LOONGSON_IRQ_TYPE_IOAPIC 4
63 #define KVM_LOONGSON_IRQ_TYPE_ROUTE 5
64
65 /* out-of-kernel GIC cpu interrupt injection irq_number field */
66 #define KVM_LOONGSON_IRQ_CPU_IRQ 0
67 #define KVM_LOONGSON_IRQ_CPU_FIQ 1
68 #define KVM_LOONGSON_CPU_IP_NUM 8
69
70 typedef union loongarch_instruction larch_inst;
71 typedef int (*exit_handle_fn)(struct kvm_vcpu *);
72
73 int _kvm_emu_mmio_write(struct kvm_vcpu *vcpu, larch_inst inst);
74 int _kvm_emu_mmio_read(struct kvm_vcpu *vcpu, larch_inst inst);
75 int _kvm_complete_mmio_read(struct kvm_vcpu *vcpu, struct kvm_run *run);
76 int _kvm_complete_iocsr_read(struct kvm_vcpu *vcpu, struct kvm_run *run);
77 int _kvm_emu_idle(struct kvm_vcpu *vcpu);
78 int _kvm_handle_pv_hcall(struct kvm_vcpu *vcpu);
79 int _kvm_pending_timer(struct kvm_vcpu *vcpu);
80 int _kvm_handle_fault(struct kvm_vcpu *vcpu, int fault);
81 void _kvm_deliver_intr(struct kvm_vcpu *vcpu);
82 void irqchip_debug_init(struct kvm *kvm);
83 void irqchip_debug_destroy(struct kvm *kvm);
84
85 void kvm_own_fpu(struct kvm_vcpu *vcpu);
86 void kvm_own_lsx(struct kvm_vcpu *vcpu);
87 void kvm_lose_fpu(struct kvm_vcpu *vcpu);
88 void kvm_own_lasx(struct kvm_vcpu *vcpu);
89 void kvm_own_lbt(struct kvm_vcpu *vcpu);
90 void kvm_restore_lbt(struct kvm_vcpu *cpu);
91 void kvm_save_lbt(struct kvm_vcpu *cpu);
92 void kvm_save_fpu(struct kvm_vcpu *cpu);
93 void kvm_restore_fpu(struct kvm_vcpu *cpu);
94 void kvm_save_lsx(struct kvm_vcpu *cpu);
95 void kvm_restore_lsx(struct kvm_vcpu *cpu);
96 void kvm_restore_lsx_upper(struct kvm_vcpu *cpu);
97 void kvm_save_lasx(struct kvm_vcpu *cpu);
98 void kvm_restore_lasx(struct kvm_vcpu *cpu);
99 void kvm_restore_lasx_upper(struct kvm_vcpu *cpu);
100
101 void kvm_lose_hw_perf(struct kvm_vcpu *vcpu);
102 void kvm_restore_hw_perf(struct kvm_vcpu *vcpu);
103
104 void kvm_acquire_timer(struct kvm_vcpu *vcpu);
105 void kvm_reset_timer(struct kvm_vcpu *vcpu);
106 enum hrtimer_restart kvm_count_timeout(struct kvm_vcpu *vcpu);
107 void kvm_init_timer(struct kvm_vcpu *vcpu, unsigned long hz);
108 void kvm_restore_timer(struct kvm_vcpu *vcpu);
109 void kvm_save_timer(struct kvm_vcpu *vcpu);
110
111 /*
112 * Loongarch KVM guest interrupt handling.
113 */
_kvm_queue_irq(struct kvm_vcpu *vcpu, unsigned int irq)114 static inline void _kvm_queue_irq(struct kvm_vcpu *vcpu, unsigned int irq)
115 {
116 set_bit(irq, &vcpu->arch.irq_pending);
117 clear_bit(irq, &vcpu->arch.irq_clear);
118 }
119
_kvm_dequeue_irq(struct kvm_vcpu *vcpu, unsigned int irq)120 static inline void _kvm_dequeue_irq(struct kvm_vcpu *vcpu, unsigned int irq)
121 {
122 clear_bit(irq, &vcpu->arch.irq_pending);
123 set_bit(irq, &vcpu->arch.irq_clear);
124 }
125
126 #endif /* __ASM_LOONGARCH_KVMCPU_H__ */
127