arch/riscv/include/asm/kvm_vcpu_timer.h

Source file repositories/reference/linux-study-clean/arch/riscv/include/asm/kvm_vcpu_timer.h

File Facts

System
Linux kernel
Corpus path
arch/riscv/include/asm/kvm_vcpu_timer.h
Extension
.h
Size
1595 bytes
Lines
53
Domain
Architecture Layer
Bucket
arch/riscv
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

struct kvm_guest_timer {
	/* Mult & Shift values to get nanoseconds from cycles */
	u32 nsec_mult;
	u32 nsec_shift;
	/* Time delta value */
	u64 time_delta;
};

struct kvm_vcpu_timer {
	/* Flag for whether init is done */
	bool init_done;
	/* Flag for whether timer event is configured */
	bool next_set;
	/* Next timer event cycles */
	u64 next_cycles;
	/* Underlying hrtimer instance */
	struct hrtimer hrt;

	/* Flag to check if sstc is enabled or not */
	bool sstc_enabled;
	/* A function pointer to switch between stimecmp or hrtimer at runtime */
	int (*timer_next_event)(struct kvm_vcpu *vcpu, u64 ncycles);
};

int kvm_riscv_vcpu_timer_next_event(struct kvm_vcpu *vcpu, u64 ncycles);
int kvm_riscv_vcpu_get_reg_timer(struct kvm_vcpu *vcpu,
				 const struct kvm_one_reg *reg);
int kvm_riscv_vcpu_set_reg_timer(struct kvm_vcpu *vcpu,
				 const struct kvm_one_reg *reg);
int kvm_riscv_vcpu_timer_init(struct kvm_vcpu *vcpu);
int kvm_riscv_vcpu_timer_deinit(struct kvm_vcpu *vcpu);
int kvm_riscv_vcpu_timer_reset(struct kvm_vcpu *vcpu);
void kvm_riscv_vcpu_timer_restore(struct kvm_vcpu *vcpu);
void kvm_riscv_guest_timer_init(struct kvm *kvm);
void kvm_riscv_vcpu_timer_sync(struct kvm_vcpu *vcpu);
void kvm_riscv_vcpu_timer_save(struct kvm_vcpu *vcpu);
bool kvm_riscv_vcpu_timer_pending(struct kvm_vcpu *vcpu);

#endif

Annotation

Implementation Notes