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debug_core,x86,blackfin: Clean up hw debug disable API 

The kgdb_disable_hw_debug() was an architecture specific function for
disabling all hardware breakpoints on a per cpu basis when entering
the debug core.

This patch will remove the weak function kdbg_disable_hw_debug() and
change it into a call back which lives with the rest of hw breakpoint
call backs in struct kgdb_arch.

Signed-off-by: Dongdong Deng <dongdong.deng@windriver.com>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
This commit is contained in:
Dongdong Deng 2010-08-18 06:02:00 -05:00 committed by Jason Wessel
parent 578bd4dfcd
commit d7ba979d45
4 changed files with 10 additions and 25 deletions
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3
arch/blackfin/kernel/kgdb.c
View File

@ -320,7 +320,7 @@ static void bfin_correct_hw_break(void)
}
}
void kgdb_disable_hw_debug(struct pt_regs *regs)
static void bfin_disable_hw_debug(struct pt_regs *regs)
{
/* Disable hardware debugging while we are in kgdb */
bfin_write_WPIACTL(0);
@ -406,6 +406,7 @@ struct kgdb_arch arch_kgdb_ops = {
#endif
.set_hw_breakpoint = bfin_set_hw_break,
.remove_hw_breakpoint = bfin_remove_hw_break,
.disable_hw_break = bfin_disable_hw_debug,
.remove_all_hw_break = bfin_remove_all_hw_break,
.correct_hw_break = bfin_correct_hw_break,
};

3
arch/x86/kernel/kgdb.c
View File

@ -387,7 +387,7 @@ kgdb_set_hw_break(unsigned long addr, int len, enum kgdb_bptype bptype)
* disable hardware debugging while it is processing gdb packets or
* handling exception.
*/
void kgdb_disable_hw_debug(struct pt_regs *regs)
static void kgdb_disable_hw_debug(struct pt_regs *regs)
{
int i;
int cpu = raw_smp_processor_id();
@ -724,6 +724,7 @@ struct kgdb_arch arch_kgdb_ops = {
.flags = KGDB_HW_BREAKPOINT,
.set_hw_breakpoint = kgdb_set_hw_break,
.remove_hw_breakpoint = kgdb_remove_hw_break,
.disable_hw_break = kgdb_disable_hw_debug,
.remove_all_hw_break = kgdb_remove_all_hw_break,
.correct_hw_break = kgdb_correct_hw_break,
};

13
include/linux/kgdb.h
View File

@ -35,16 +35,6 @@ struct pt_regs;
*/
extern int kgdb_skipexception(int exception, struct pt_regs *regs);
/**
* kgdb_disable_hw_debug - (optional) Disable hardware debugging hook
* @regs: Current &struct pt_regs.
*
* This function will be called if the particular architecture must
* disable hardware debugging while it is processing gdb packets or
* handling exception.
*/
extern void kgdb_disable_hw_debug(struct pt_regs *regs);
struct tasklet_struct;
struct task_struct;
struct uart_port;
@ -243,6 +233,8 @@ extern void kgdb_arch_late(void);
* breakpoint.
* @remove_hw_breakpoint: Allow an architecture to specify how to remove a
* hardware breakpoint.
* @disable_hw_break: Allow an architecture to specify how to disable
* hardware breakpoints for a single cpu.
* @remove_all_hw_break: Allow an architecture to specify how to remove all
* hardware breakpoints.
* @correct_hw_break: Allow an architecture to specify how to correct the
@ -256,6 +248,7 @@ struct kgdb_arch {
int (*remove_breakpoint)(unsigned long, char *);
int (*set_hw_breakpoint)(unsigned long, int, enum kgdb_bptype);
int (*remove_hw_breakpoint)(unsigned long, int, enum kgdb_bptype);
void (*disable_hw_break)(struct pt_regs *regs);
void (*remove_all_hw_break)(void);
void (*correct_hw_break)(void);
};

16
kernel/debug/debug_core.c
View File

@ -209,18 +209,6 @@ int __weak kgdb_skipexception(int exception, struct pt_regs *regs)
return 0;
}
/**
* kgdb_disable_hw_debug - Disable hardware debugging while we in kgdb.
* @regs: Current &struct pt_regs.
*
* This function will be called if the particular architecture must
* disable hardware debugging while it is processing gdb packets or
* handling exception.
*/
void __weak kgdb_disable_hw_debug(struct pt_regs *regs)
{
}
/*
* Some architectures need cache flushes when we set/clear a
* breakpoint:
@ -484,7 +472,9 @@ static int kgdb_cpu_enter(struct kgdb_state *ks, struct pt_regs *regs,
atomic_inc(&masters_in_kgdb);
else
atomic_inc(&slaves_in_kgdb);
kgdb_disable_hw_debug(ks->linux_regs);
if (arch_kgdb_ops.disable_hw_break)
arch_kgdb_ops.disable_hw_break(regs);
acquirelock:
/*