diff options
| author | Andrew Jones <ajones@ventanamicro.com> | 2023-12-20 17:00:14 +0100 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2023-12-30 06:55:03 +0100 |
| commit | 323925ed6dbb0ed877047b28fae4152527cc63db (patch) | |
| tree | d22cf639397eaedd990f55d65c89fed22174db4d /arch/riscv/include/asm/paravirt.h | |
| parent | RISC-V: KVM: Fix indentation in kvm_riscv_vcpu_set_reg_csr() (diff) | |
| download | linux-323925ed6dbb0ed877047b28fae4152527cc63db.tar.xz linux-323925ed6dbb0ed877047b28fae4152527cc63db.zip | |
RISC-V: paravirt: Add skeleton for pv-time support
Add the files and functions needed to support paravirt time on
RISC-V. Also include the common code needed for the first
application of pv-time, which is steal-time. In the next
patches we'll complete the functions to fully enable steal-time
support.
Acked-by: Palmer Dabbelt <palmer@rivosinc.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Signed-off-by: Andrew Jones <ajones@ventanamicro.com>
Signed-off-by: Anup Patel <anup@brainfault.org>
Diffstat (limited to 'arch/riscv/include/asm/paravirt.h')
| -rw-r--r-- | arch/riscv/include/asm/paravirt.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/paravirt.h b/arch/riscv/include/asm/paravirt.h new file mode 100644 index 000000000000..c0abde70fc2c --- /dev/null +++ b/arch/riscv/include/asm/paravirt.h @@ -0,0 +1,28 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_RISCV_PARAVIRT_H +#define _ASM_RISCV_PARAVIRT_H + +#ifdef CONFIG_PARAVIRT +#include <linux/static_call_types.h> + +struct static_key; +extern struct static_key paravirt_steal_enabled; +extern struct static_key paravirt_steal_rq_enabled; + +u64 dummy_steal_clock(int cpu); + +DECLARE_STATIC_CALL(pv_steal_clock, dummy_steal_clock); + +static inline u64 paravirt_steal_clock(int cpu) +{ + return static_call(pv_steal_clock)(cpu); +} + +int __init pv_time_init(void); + +#else + +#define pv_time_init() do {} while (0) + +#endif /* CONFIG_PARAVIRT */ +#endif /* _ASM_RISCV_PARAVIRT_H */ |