arm64: Add framework to turn an IPI as NMI

[PATCH v8 08/10] kgdb: Provide a stub kgdb_nmicallback() if !CONFIG_KGDB

Posted by Douglas Anderson 2 years, 8 months ago

To save architectures from needing to wrap the call in #ifdefs, add a
stub no-op version of kgdb_nmicallback(), which returns 1 if it didn't
handle anything.

Signed-off-by: Douglas Anderson <dianders@chromium.org>
---

Changes in v8:
- "Provide a stub kgdb_nmicallback() if !CONFIG_KGDB" new for v8

 include/linux/kgdb.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/linux/kgdb.h b/include/linux/kgdb.h
index 87713bd390f3..9ce628ee47cc 100644
--- a/include/linux/kgdb.h
+++ b/include/linux/kgdb.h
@@ -377,5 +377,6 @@ extern void kgdb_free_init_mem(void);
 #define dbg_late_init()
 static inline void kgdb_panic(const char *msg) {}
 static inline void kgdb_free_init_mem(void) { }
+static int kgdb_nmicallback(int cpu, void *regs) { return 1; }
 #endif /* ! CONFIG_KGDB */
 #endif /* _KGDB_H_ */
-- 
2.40.0.634.g4ca3ef3211-goog

Re: [PATCH v8 08/10] kgdb: Provide a stub kgdb_nmicallback() if !CONFIG_KGDB

Posted by Doug Anderson 2 years, 7 months ago

Hi,

On Wed, Apr 19, 2023 at 3:57 PM Douglas Anderson <dianders@chromium.org> wrote:
>
> To save architectures from needing to wrap the call in #ifdefs, add a
> stub no-op version of kgdb_nmicallback(), which returns 1 if it didn't
> handle anything.
>
> Signed-off-by: Douglas Anderson <dianders@chromium.org>
> ---
>
> Changes in v8:
> - "Provide a stub kgdb_nmicallback() if !CONFIG_KGDB" new for v8
>
>  include/linux/kgdb.h | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/include/linux/kgdb.h b/include/linux/kgdb.h
> index 87713bd390f3..9ce628ee47cc 100644
> --- a/include/linux/kgdb.h
> +++ b/include/linux/kgdb.h
> @@ -377,5 +377,6 @@ extern void kgdb_free_init_mem(void);
>  #define dbg_late_init()
>  static inline void kgdb_panic(const char *msg) {}
>  static inline void kgdb_free_init_mem(void) { }
> +static int kgdb_nmicallback(int cpu, void *regs) { return 1; }

FWIW: I just realized that the above needs an "inline" to make the
compiler not complain. I'm still hoping for more feedback on the
series, but I'll plan to fix that in the next spin.

-Doug

Re: [PATCH v8 08/10] kgdb: Provide a stub kgdb_nmicallback() if !CONFIG_KGDB

Posted by Daniel Thompson 2 years, 7 months ago

On Thu, May 11, 2023 at 07:34:30AM -0700, Doug Anderson wrote:
> Hi,
>
> On Wed, Apr 19, 2023 at 3:57 PM Douglas Anderson <dianders@chromium.org> wrote:
> >
> > To save architectures from needing to wrap the call in #ifdefs, add a
> > stub no-op version of kgdb_nmicallback(), which returns 1 if it didn't
> > handle anything.
> >
> > Signed-off-by: Douglas Anderson <dianders@chromium.org>
> > ---
> >
> > Changes in v8:
> > - "Provide a stub kgdb_nmicallback() if !CONFIG_KGDB" new for v8
> >
> >  include/linux/kgdb.h | 1 +
> >  1 file changed, 1 insertion(+)
> >
> > diff --git a/include/linux/kgdb.h b/include/linux/kgdb.h
> > index 87713bd390f3..9ce628ee47cc 100644
> > --- a/include/linux/kgdb.h
> > +++ b/include/linux/kgdb.h
> > @@ -377,5 +377,6 @@ extern void kgdb_free_init_mem(void);
> >  #define dbg_late_init()
> >  static inline void kgdb_panic(const char *msg) {}
> >  static inline void kgdb_free_init_mem(void) { }
> > +static int kgdb_nmicallback(int cpu, void *regs) { return 1; }
>
> FWIW: I just realized that the above needs an "inline" to make the
> compiler not complain. I'm still hoping for more feedback on the
> series, but I'll plan to fix that in the next spin.

On the next spin feel free to add:
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>


Daniel.