1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (C) 2020-2023 Loongson Technology Corporation Limited
6 #ifndef __ASM_LOONGARCH_KVM_VCPU_H__
7 #define __ASM_LOONGARCH_KVM_VCPU_H__
9 #include <linux/kvm_host.h>
10 #include <asm/loongarch.h>
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)
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)
29 #define MNSEC_PER_SEC (NSEC_PER_SEC >> 20)
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
39 typedef union loongarch_instruction larch_inst;
40 typedef int (*exit_handle_fn)(struct kvm_vcpu *);
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);
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);
58 void kvm_acquire_timer(struct kvm_vcpu *vcpu);
59 void kvm_init_timer(struct kvm_vcpu *vcpu, unsigned long hz);
60 void kvm_reset_timer(struct kvm_vcpu *vcpu);
61 void kvm_save_timer(struct kvm_vcpu *vcpu);
62 void kvm_restore_timer(struct kvm_vcpu *vcpu);
64 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq);
67 * Loongarch KVM guest interrupt handling
69 static inline void kvm_queue_irq(struct kvm_vcpu *vcpu, unsigned int irq)
71 set_bit(irq, &vcpu->arch.irq_pending);
72 clear_bit(irq, &vcpu->arch.irq_clear);
75 static inline void kvm_dequeue_irq(struct kvm_vcpu *vcpu, unsigned int irq)
77 clear_bit(irq, &vcpu->arch.irq_pending);
78 set_bit(irq, &vcpu->arch.irq_clear);
81 static inline int kvm_queue_exception(struct kvm_vcpu *vcpu,
82 unsigned int code, unsigned int subcode)
84 /* only one exception can be injected */
85 if (!vcpu->arch.exception_pending) {
86 set_bit(code, &vcpu->arch.exception_pending);
87 vcpu->arch.esubcode = subcode;
93 #endif /* __ASM_LOONGARCH_KVM_VCPU_H__ */