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Commit 812cb83a authored by Kirill Tkhai's avatar Kirill Tkhai Committed by David S. Miller
Browse files

sparc64: Implement HAVE_CONTEXT_TRACKING 



Mark the places when the system are in user or are in kernel.
This is used to make full dynticks system (tickless) --
CONFIG_NO_HZ_FULL dependence.

Signed-off-by: default avatarKirill Tkhai <tkhai@yandex.ru>
CC: David Miller <davem@davemloft.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 1a36265b

arch/sparc/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -64,6 +64,7 @@ config SPARC64 
	select HAVE_DYNAMIC_FTRACE

	select HAVE_FTRACE_MCOUNT_RECORD

	select HAVE_SYSCALL_TRACEPOINTS

	select HAVE_CONTEXT_TRACKING

	select HAVE_DEBUG_KMEMLEAK

	select RTC_DRV_CMOS

	select RTC_DRV_BQ4802

arch/sparc/include/asm/thread_info_64.h

+2 −1
Original line number Diff line number Diff line
@@ -192,7 +192,7 @@ register struct thread_info *current_thread_info_reg asm("g6"); 
#define TIF_UNALIGNED		5	/* allowed to do unaligned accesses */

/* flag bit 6 is available */

#define TIF_32BIT		7	/* 32-bit binary */

/* flag bit 8 is available */

#define TIF_NOHZ		8	/* in adaptive nohz mode */

#define TIF_SECCOMP		9	/* secure computing */

#define TIF_SYSCALL_AUDIT	10	/* syscall auditing active */

#define TIF_SYSCALL_TRACEPOINT	11	/* syscall tracepoint instrumentation */
@@ -210,6 +210,7 @@ register struct thread_info *current_thread_info_reg asm("g6"); 
#define _TIF_NEED_RESCHED	(1<<TIF_NEED_RESCHED)

#define _TIF_UNALIGNED		(1<<TIF_UNALIGNED)

#define _TIF_32BIT		(1<<TIF_32BIT)

#define _TIF_NOHZ		(1<<TIF_NOHZ)

#define _TIF_SECCOMP		(1<<TIF_SECCOMP)

#define _TIF_SYSCALL_AUDIT	(1<<TIF_SYSCALL_AUDIT)

#define _TIF_SYSCALL_TRACEPOINT	(1<<TIF_SYSCALL_TRACEPOINT)

arch/sparc/kernel/entry.h

+0 −1
Original line number Diff line number Diff line
@@ -88,7 +88,6 @@ extern asmlinkage void syscall_trace_leave(struct pt_regs *regs); 


extern void bad_trap_tl1(struct pt_regs *regs, long lvl);



extern void do_fpe_common(struct pt_regs *regs);

extern void do_fpieee(struct pt_regs *regs);

extern void do_fpother(struct pt_regs *regs);

extern void do_tof(struct pt_regs *regs);

arch/sparc/kernel/kgdb_64.c

+4 −1
Original line number Diff line number Diff line
@@ -159,11 +159,12 @@ int kgdb_arch_handle_exception(int e_vector, int signo, int err_code, 


asmlinkage void kgdb_trap(unsigned long trap_level, struct pt_regs *regs)

{

	enum ctx_state prev_state = exception_enter();

	unsigned long flags;



	if (user_mode(regs)) {

		bad_trap(regs, trap_level);

		return;

		goto out;

	}



	flushw_all();
@@ -171,6 +172,8 @@ asmlinkage void kgdb_trap(unsigned long trap_level, struct pt_regs *regs) 
	local_irq_save(flags);

	kgdb_handle_exception(0x172, SIGTRAP, 0, regs);

	local_irq_restore(flags);

out:

	exception_exit(prev_state);

}



int kgdb_arch_init(void)

arch/sparc/kernel/kprobes.c

+6 −1
Original line number Diff line number Diff line
@@ -8,6 +8,7 @@ 
#include <linux/module.h>

#include <linux/kdebug.h>

#include <linux/slab.h>

#include <linux/context_tracking.h>

#include <asm/signal.h>

#include <asm/cacheflush.h>

#include <asm/uaccess.h>
@@ -418,12 +419,14 @@ int __kprobes kprobe_exceptions_notify(struct notifier_block *self, 
asmlinkage void __kprobes kprobe_trap(unsigned long trap_level,

				      struct pt_regs *regs)

{

	enum ctx_state prev_state = exception_enter();



	BUG_ON(trap_level != 0x170 && trap_level != 0x171);



	if (user_mode(regs)) {

		local_irq_enable();

		bad_trap(regs, trap_level);

		return;

		goto out;

	}



	/* trap_level == 0x170 --> ta 0x70
@@ -433,6 +436,8 @@ asmlinkage void __kprobes kprobe_trap(unsigned long trap_level, 
		       (trap_level == 0x170) ? "debug" : "debug_2",

		       regs, 0, trap_level, SIGTRAP) != NOTIFY_STOP)

		bad_trap(regs, trap_level);

out:

	exception_exit(prev_state);

}



/* Jprobes support.  */