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| author | Anton Vorontsov <anton.vorontsov@linaro.org> | 2012-09-25 01:27:50 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-09-27 00:42:25 +0400 |
| commit | 5a14fead07bcf4e0acc877a8d9e1d1f40a441153 (patch) | |
| tree | 7fd90cf9cdd0b734f013df6bb86f34fdd80c5732 /include/linux/kgdb.h | |
| parent | c5dd553b9fd069892c9e2de734f4f604e280fa7a (diff) | |
| download | linux-5a14fead07bcf4e0acc877a8d9e1d1f40a441153.tar.xz | |
kernel/debug: Mask KGDB NMI upon entry
The new arch callback should manage NMIs that usually cause KGDB to
enter. That is, not all NMIs should be enabled/disabled, but only
those that issue kgdb_handle_exception().
We must mask it as serial-line interrupt can be used as an NMI, so
if the original KGDB-entry cause was say a breakpoint, then every
input to KDB console will cause KGDB to reenter, which we don't want.
Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
Acked-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/kgdb.h')
| -rw-r--r-- | include/linux/kgdb.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/kgdb.h b/include/linux/kgdb.h index c4d2fc194ede..7800cce284db 100644 --- a/include/linux/kgdb.h +++ b/include/linux/kgdb.h @@ -240,6 +240,7 @@ extern void kgdb_arch_late(void); * hardware breakpoints. * @correct_hw_break: Allow an architecture to specify how to correct the * hardware debug registers. + * @enable_nmi: Manage NMI-triggered entry to KGDB */ struct kgdb_arch { unsigned char gdb_bpt_instr[BREAK_INSTR_SIZE]; @@ -252,6 +253,8 @@ struct kgdb_arch { void (*disable_hw_break)(struct pt_regs *regs); void (*remove_all_hw_break)(void); void (*correct_hw_break)(void); + + void (*enable_nmi)(bool on); }; /** |