Commit d2862bb9 authored by Thomas Weißschuh's avatar Thomas Weißschuh Committed by Thomas Gleixner
Browse files

LoongArch: vDSO: Switch to generic storage implementation 



The generic storage implementation provides the same features as the
custom one. However it can be shared between architectures, making
maintenance easier.

Co-developed-by: default avatarNam Cao <namcao@linutronix.de>
Signed-off-by: default avatarNam Cao <namcao@linutronix.de>
Signed-off-by: default avatarThomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20250204-vdso-store-rng-v3-10-13a4669dfc8c@linutronix.de
parent 46fe55b2

arch/loongarch/Kconfig

+2 −0
Original line number Diff line number Diff line
@@ -30,6 +30,7 @@ config LOONGARCH 
	select ARCH_HAS_SET_MEMORY

	select ARCH_HAS_SET_DIRECT_MAP

	select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST

	select ARCH_HAS_VDSO_ARCH_DATA

	select ARCH_INLINE_READ_LOCK if !PREEMPTION

	select ARCH_INLINE_READ_LOCK_BH if !PREEMPTION

	select ARCH_INLINE_READ_LOCK_IRQ if !PREEMPTION
@@ -106,6 +107,7 @@ config LOONGARCH 
	select GENERIC_SCHED_CLOCK

	select GENERIC_SMP_IDLE_THREAD

	select GENERIC_TIME_VSYSCALL

	select GENERIC_VDSO_DATA_STORE

	select GENERIC_VDSO_TIME_NS

	select GPIOLIB

	select HAS_IOPORT

arch/loongarch/include/asm/vdso.h

+0 −1
Original line number Diff line number Diff line
@@ -31,7 +31,6 @@ struct loongarch_vdso_info { 
	unsigned long size;

	unsigned long offset_sigreturn;

	struct vm_special_mapping code_mapping;

	struct vm_special_mapping data_mapping;

};



extern struct loongarch_vdso_info vdso_info;

arch/loongarch/include/asm/vdso/arch_data.h

0 → 100644
+25 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0-or-later */

/*

 * Author: Huacai Chen <chenhuacai@loongson.cn>

 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited

 */



#ifndef _VDSO_ARCH_DATA_H

#define _VDSO_ARCH_DATA_H



#ifndef __ASSEMBLY__



#include <asm/asm.h>

#include <asm/vdso.h>



struct vdso_pcpu_data {

	u32 node;

} ____cacheline_aligned_in_smp;



struct vdso_arch_data {

	struct vdso_pcpu_data pdata[NR_CPUS];

};



#endif /* __ASSEMBLY__ */



#endif

arch/loongarch/include/asm/vdso/getrandom.h

+0 −5
Original line number Diff line number Diff line
@@ -28,11 +28,6 @@ static __always_inline ssize_t getrandom_syscall(void *_buffer, size_t _len, uns 
	return ret;

}



static __always_inline const struct vdso_rng_data *__arch_get_vdso_rng_data(void)

{

	return &_loongarch_data.rng_data;

}



#endif /* !__ASSEMBLY__ */



#endif /* __ASM_VDSO_GETRANDOM_H */

arch/loongarch/include/asm/vdso/gettimeofday.h

+1 −13
Original line number Diff line number Diff line
@@ -72,7 +72,7 @@ static __always_inline int clock_getres_fallback( 
}



static __always_inline u64 __arch_get_hw_counter(s32 clock_mode,

						 const struct vdso_data *vd)

						 const struct vdso_time_data *vd)

{

	uint64_t count;
@@ -89,18 +89,6 @@ static inline bool loongarch_vdso_hres_capable(void) 
}

#define __arch_vdso_hres_capable loongarch_vdso_hres_capable



static __always_inline const struct vdso_data *__arch_get_vdso_data(void)

{

	return _vdso_data;

}



#ifdef CONFIG_TIME_NS

static __always_inline

const struct vdso_data *__arch_get_timens_vdso_data(const struct vdso_data *vd)

{

	return _timens_data;

}

#endif

#endif /* !__ASSEMBLY__ */



#endif /* __ASM_VDSO_GETTIMEOFDAY_H */