Commit 0d3b051a authored by Guo Ren's avatar Guo Ren
Browse files

csky: Add VDSO with GENERIC_GETTIMEOFDAY, GENERIC_TIME_VSYSCALL, HAVE_GENERIC_VDSO 



It could help to reduce the latency of the time-related functions
in user space.

We have referenced arm's and riscv's implementation for the patch.

Signed-off-by: default avatarGuo Ren <guoren@linux.alibaba.com>
Cc: Vincent Chen <vincent.chen@sifive.com>
Cc: Arnd Bergmann <arnd@arndb.de>
parent 8dcbc611

arch/csky/Kconfig

+4 −0
Original line number Diff line number Diff line
@@ -35,6 +35,9 @@ config CSKY 
	select GENERIC_IRQ_MULTI_HANDLER

	select GENERIC_SCHED_CLOCK

	select GENERIC_SMP_IDLE_THREAD

	select GENERIC_TIME_VSYSCALL

	select GENERIC_VDSO_32

	select GENERIC_GETTIMEOFDAY

	select GX6605S_TIMER if CPU_CK610

	select HAVE_ARCH_TRACEHOOK

	select HAVE_ARCH_AUDITSYSCALL
@@ -46,6 +49,7 @@ config CSKY 
	select HAVE_DEBUG_KMEMLEAK

	select HAVE_DYNAMIC_FTRACE

	select HAVE_DYNAMIC_FTRACE_WITH_REGS

	select HAVE_GENERIC_VDSO

	select HAVE_FUNCTION_TRACER

	select HAVE_FUNCTION_GRAPH_TRACER

	select HAVE_FUNCTION_ERROR_INJECTION

arch/csky/abiv1/inc/abi/regdef.h

+5 −0
Original line number Diff line number Diff line
@@ -4,7 +4,12 @@ 
#ifndef __ASM_CSKY_REGDEF_H

#define __ASM_CSKY_REGDEF_H



#ifdef __ASSEMBLY__

#define syscallid	r1

#else

#define syscallid	"r1"

#endif



#define regs_syscallid(regs) regs->regs[9]

#define regs_fp(regs) regs->regs[2]

arch/csky/abiv2/inc/abi/regdef.h

+5 −0
Original line number Diff line number Diff line
@@ -4,7 +4,12 @@ 
#ifndef __ASM_CSKY_REGDEF_H

#define __ASM_CSKY_REGDEF_H



#ifdef __ASSEMBLY__

#define syscallid	r7

#else

#define syscallid	"r7"

#endif



#define regs_syscallid(regs) regs->regs[3]

#define regs_fp(regs) regs->regs[4]

arch/csky/include/asm/clocksource.h

0 → 100644
+8 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0 */



#ifndef __ASM_VDSO_CSKY_CLOCKSOURCE_H

#define __ASM_VDSO_CSKY_CLOCKSOURCE_H



#include <asm/vdso/clocksource.h>



#endif

arch/csky/include/asm/vdso.h

+2 −0
Original line number Diff line number Diff line
@@ -5,8 +5,10 @@ 


#include <linux/types.h>



#ifndef GENERIC_TIME_VSYSCALL

struct vdso_data {

};

#endif



/*

 * The VDSO symbols are mapped into Linux so we can just use regular symbol