mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-15 23:14:31 +08:00
3a9f66cb25
The RISC-V hypervisor specification doesn't have any virtual timer feature. Due to this, the guest VCPU timer will be programmed via SBI calls. The host will use a separate hrtimer event for each guest VCPU to provide timer functionality. We inject a virtual timer interrupt to the guest VCPU whenever the guest VCPU hrtimer event expires. This patch adds guest VCPU timer implementation along with ONE_REG interface to access VCPU timer state from user space. Signed-off-by: Atish Patra <atish.patra@wdc.com> Signed-off-by: Anup Patel <anup.patel@wdc.com> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Palmer Dabbelt <palmerdabbelt@google.com>
17 lines
316 B
C
17 lines
316 B
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright (C) 2019 Western Digital Corporation or its affiliates.
|
|
*
|
|
* Authors:
|
|
* Atish Patra <atish.patra@wdc.com>
|
|
*/
|
|
|
|
#ifndef __TIMER_RISCV_H
|
|
#define __TIMER_RISCV_H
|
|
|
|
#include <linux/types.h>
|
|
|
|
extern void riscv_cs_get_mult_shift(u32 *mult, u32 *shift);
|
|
|
|
#endif
|