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a=5yU3S35YU4bGjq-dph-N:22 a=Bho9c0fBagfJEIQBS7DQ:22 cc=ntf awl=host:13723 X-Proofpoint-GUID: ZU9nTXKRnrgzCWRDx0qDMwqhWsyrmftV X-Proofpoint-ORIG-GUID: ZU9nTXKRnrgzCWRDx0qDMwqhWsyrmftV Moves some constants and functions related to xloops, cycles computation out to a new header. Also make __delay_cycles() available outside of arch/arm64/lib/delay.c. Rename some macros in qcom/rpmh-rsc.c which were occupying the same namespace. No functional change. Cc: Catalin Marinas Cc: Will Deacon Cc: Bjorn Andersson Cc: Konrad Dybcio Cc: linux-arm-kernel@lists.infradead.org Reviewed-by: Christoph Lameter Acked-by: Catalin Marinas Signed-off-by: Ankur Arora --- Notes: - include (flagged by sashiko) --- arch/arm64/include/asm/delay-const.h | 28 ++++++++++++++++++++++++++++ arch/arm64/lib/delay.c | 15 ++++----------- drivers/soc/qcom/rpmh-rsc.c | 8 ++++---- 3 files changed, 36 insertions(+), 15 deletions(-) create mode 100644 arch/arm64/include/asm/delay-const.h diff --git a/arch/arm64/include/asm/delay-const.h b/arch/arm64/include/asm/delay-const.h new file mode 100644 index 000000000000..2a5acfb7bff1 --- /dev/null +++ b/arch/arm64/include/asm/delay-const.h @@ -0,0 +1,28 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +#ifndef _ASM_DELAY_CONST_H +#define _ASM_DELAY_CONST_H + +#include +#include /* For HZ */ + +/* 2**32 / 1000000 (rounded up) */ +#define __usecs_to_xloops_mult 0x10C7UL + +/* 2**32 / 1000000000 (rounded up) */ +#define __nsecs_to_xloops_mult 0x5UL + +extern unsigned long loops_per_jiffy; +static inline unsigned long xloops_to_cycles(unsigned long xloops) +{ + return (xloops * loops_per_jiffy * HZ) >> 32; +} + +#define USECS_TO_CYCLES(time_usecs) \ + xloops_to_cycles((time_usecs) * __usecs_to_xloops_mult) + +#define NSECS_TO_CYCLES(time_nsecs) \ + xloops_to_cycles((time_nsecs) * __nsecs_to_xloops_mult) + +u64 notrace __delay_cycles(void); + +#endif /* _ASM_DELAY_CONST_H */ diff --git a/arch/arm64/lib/delay.c b/arch/arm64/lib/delay.c index e278e060e78a..c660a7ea26dd 100644 --- a/arch/arm64/lib/delay.c +++ b/arch/arm64/lib/delay.c @@ -12,17 +12,10 @@ #include #include #include +#include #include -#define USECS_TO_CYCLES(time_usecs) \ - xloops_to_cycles((time_usecs) * 0x10C7UL) - -static inline unsigned long xloops_to_cycles(unsigned long xloops) -{ - return (xloops * loops_per_jiffy * HZ) >> 32; -} - /* * Force the use of CNTVCT_EL0 in order to have the same base as WFxT. * This avoids some annoying issues when CNTVOFF_EL2 is not reset 0 on a @@ -32,7 +25,7 @@ static inline unsigned long xloops_to_cycles(unsigned long xloops) * Note that userspace cannot change the offset behind our back either, * as the vcpu mutex is held as long as KVM_RUN is in progress. */ -static cycles_t notrace __delay_cycles(void) +u64 notrace __delay_cycles(void) { guard(preempt_notrace)(); return __arch_counter_get_cntvct_stable(); @@ -73,12 +66,12 @@ EXPORT_SYMBOL(__const_udelay); void __udelay(unsigned long usecs) { - __const_udelay(usecs * 0x10C7UL); /* 2**32 / 1000000 (rounded up) */ + __const_udelay(usecs * __usecs_to_xloops_mult); } EXPORT_SYMBOL(__udelay); void __ndelay(unsigned long nsecs) { - __const_udelay(nsecs * 0x5UL); /* 2**32 / 1000000000 (rounded up) */ + __const_udelay(nsecs * __nsecs_to_xloops_mult); } EXPORT_SYMBOL(__ndelay); diff --git a/drivers/soc/qcom/rpmh-rsc.c b/drivers/soc/qcom/rpmh-rsc.c index c6f7d5c9c493..ad5ec5c0de0a 100644 --- a/drivers/soc/qcom/rpmh-rsc.c +++ b/drivers/soc/qcom/rpmh-rsc.c @@ -146,10 +146,10 @@ enum { * +---------------------------------------------------+ */ -#define USECS_TO_CYCLES(time_usecs) \ - xloops_to_cycles((time_usecs) * 0x10C7UL) +#define RPMH_USECS_TO_CYCLES(time_usecs) \ + rpmh_xloops_to_cycles((time_usecs) * 0x10C7UL) -static inline unsigned long xloops_to_cycles(u64 xloops) +static inline unsigned long rpmh_xloops_to_cycles(u64 xloops) { return (xloops * loops_per_jiffy * HZ) >> 32; } @@ -819,7 +819,7 @@ void rpmh_rsc_write_next_wakeup(struct rsc_drv *drv) wakeup_us = ktime_to_us(wakeup); /* Convert the wakeup to arch timer scale */ - wakeup_cycles = USECS_TO_CYCLES(wakeup_us); + wakeup_cycles = RPMH_USECS_TO_CYCLES(wakeup_us); wakeup_cycles += arch_timer_read_counter(); exit: -- 2.31.1