arch/loongarch/include/asm/kvm_vcpu.h

Source file repositories/reference/linux-study-clean/arch/loongarch/include/asm/kvm_vcpu.h

File Facts

System
Linux kernel
Corpus path
arch/loongarch/include/asm/kvm_vcpu.h
Extension
.h
Size
5207 bytes
Lines
156
Domain
Architecture Layer
Bucket
arch/loongarch
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

static inline int kvm_own_lsx(struct kvm_vcpu *vcpu) { return -EINVAL; }
static inline void kvm_save_lsx(struct loongarch_fpu *fpu) { }
static inline void kvm_restore_lsx(struct loongarch_fpu *fpu) { }
#endif

#ifdef CONFIG_CPU_HAS_LASX
int kvm_own_lasx(struct kvm_vcpu *vcpu);
void kvm_save_lasx(struct loongarch_fpu *fpu);
void kvm_restore_lasx(struct loongarch_fpu *fpu);
#else
static inline int kvm_own_lasx(struct kvm_vcpu *vcpu) { return -EINVAL; }
static inline void kvm_save_lasx(struct loongarch_fpu *fpu) { }
static inline void kvm_restore_lasx(struct loongarch_fpu *fpu) { }
#endif

#ifdef CONFIG_CPU_HAS_LBT
int kvm_own_lbt(struct kvm_vcpu *vcpu);
#else
static inline int kvm_own_lbt(struct kvm_vcpu *vcpu) { return -EINVAL; }
#endif

void kvm_init_timer(struct kvm_vcpu *vcpu, unsigned long hz);
void kvm_save_timer(struct kvm_vcpu *vcpu);
void kvm_restore_timer(struct kvm_vcpu *vcpu);

int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq);
struct kvm_vcpu *kvm_get_vcpu_by_cpuid(struct kvm *kvm, int cpuid);

/*
 * Loongarch KVM guest interrupt handling
 */
static inline void kvm_queue_irq(struct kvm_vcpu *vcpu, unsigned int irq)
{
	set_bit(irq, &vcpu->arch.irq_pending);
	clear_bit(irq, &vcpu->arch.irq_clear);
}

static inline void kvm_dequeue_irq(struct kvm_vcpu *vcpu, unsigned int irq)
{
	clear_bit(irq, &vcpu->arch.irq_pending);
	set_bit(irq, &vcpu->arch.irq_clear);
}

static inline int kvm_queue_exception(struct kvm_vcpu *vcpu,
			unsigned int code, unsigned int subcode)
{
	/* only one exception can be injected */
	if (!vcpu->arch.exception_pending) {
		set_bit(code, &vcpu->arch.exception_pending);
		vcpu->arch.esubcode = subcode;
		return 0;
	} else
		return -1;
}

static inline unsigned long kvm_read_reg(struct kvm_vcpu *vcpu, int num)
{
	return vcpu->arch.gprs[num];
}

static inline void kvm_write_reg(struct kvm_vcpu *vcpu, int num, unsigned long val)
{
	vcpu->arch.gprs[num] = val;
}

static inline bool kvm_pvtime_supported(void)
{
	return !!sched_info_on();
}

static inline bool kvm_guest_has_pv_feature(struct kvm_vcpu *vcpu, unsigned int feature)
{
	return vcpu->kvm->arch.pv_features & BIT(feature);
}

#endif /* __ASM_LOONGARCH_KVM_VCPU_H__ */

Annotation

Implementation Notes