OPAL provides an in-memory circular buffer containing a message log
populated with various runtime messages produced by the firmware.
Provide a sysfs interface /sys/firmware/opal/messages for userspace to
view the messages.
Signed-off-by: Joel Stanley
---
arch/powerpc/include/asm/opal.h
Joel Stanley writes:
> OPAL provides an in-memory circular buffer containing a message log
> populated with various runtime messages produced by the firmware.
>
> Provide a sysfs interface /sys/firmware/opal/messages for userspace to
> view the messages.
Acked-by: Stewart Smith
> Signed-off-by:
Joel Stanley wrote:
> OPAL provides an in-memory circular buffer containing a message log
> populated with various runtime messages produced by the firmware.
>
> Provide a sysfs interface /sys/firmware/opal/messages for userspace to
> view the messages.
>
> Signed-off-by: Joel Stanley
> ---
>
Michael Neuling wrote:
> Joel Stanley wrote:
>
> > OPAL provides an in-memory circular buffer containing a message log
> > populated with various runtime messages produced by the firmware.
> >
> > Provide a sysfs interface /sys/firmware/opal/messages for userspace to
> > view the messages.
> >
On Mon, 2014-03-31 at 15:08 +1100, Michael Neuling wrote:
> > +/* OPAL in-memory console. Defined in OPAL source at core/console.c */
> > +struct memcons {
> > + __be64 magic;
> > +#define MEMCONS_MAGIC 0x6630696567726173L
>
> 0x6630696567726173 == f0iegras ... Ben!!! :-P
Yummy ! :-)
> >
On Mon, Mar 31, 2014 at 10:29 PM, Benjamin Herrenschmidt
wrote:
>> > + conbuf = phys_to_virt(be64_to_cpu(mc->obuf_phys));
>> > + wrapped = be32_to_cpu(mc->out_pos) & MEMCONS_OUT_POS_WRAP;
>> > + out_pos = be32_to_cpu(mc->out_pos) & MEMCONS_OUT_POS_MASK;
>> > +
>>
>> Are there ordering issues
