[PATCH v7 07/13] peci: Add sysfs interface for PECI bus
gregkh at linuxfoundation.org
Tue Feb 8 22:28:29 AEDT 2022
On Tue, Feb 08, 2022 at 11:15:30AM +0000, Joel Stanley wrote:
> On Tue, 8 Feb 2022 at 11:08, Greg Kroah-Hartman
> <gregkh at linuxfoundation.org> wrote:
> > On Wed, Feb 02, 2022 at 03:48:32PM +0100, Iwona Winiarska wrote:
> > > PECI devices may not be discoverable at the time when PECI controller is
> > > being added (e.g. BMC can boot up when the Host system is still in S5).
> > > Since we currently don't have the capabilities to figure out the Host
> > > system state inside the PECI subsystem itself, we have to rely on
> > > userspace to do it for us.
> > >
> > > In the future, PECI subsystem may be expanded with mechanisms that allow
> > > us to avoid depending on userspace interaction (e.g. CPU presence could
> > > be detected using GPIO, and the information on whether it's discoverable
> > > could be obtained over IPMI).
> > > Unfortunately, those methods may ultimately not be available (support
> > > will vary from platform to platform), which means that we still need
> > > platform independent method triggered by userspace.
> > >
> > > Signed-off-by: Iwona Winiarska <iwona.winiarska at intel.com>
> > > ---
> > > Documentation/ABI/testing/sysfs-bus-peci | 16 +++++
> > > drivers/peci/Makefile | 2 +-
> > > drivers/peci/core.c | 3 +-
> > > drivers/peci/device.c | 1 +
> > > drivers/peci/internal.h | 5 ++
> > > drivers/peci/sysfs.c | 82 ++++++++++++++++++++++++
> > > 6 files changed, 107 insertions(+), 2 deletions(-)
> > > create mode 100644 Documentation/ABI/testing/sysfs-bus-peci
> > > create mode 100644 drivers/peci/sysfs.c
> > >
> > > diff --git a/Documentation/ABI/testing/sysfs-bus-peci b/Documentation/ABI/testing/sysfs-bus-peci
> > > new file mode 100644
> > > index 000000000000..56c2b2216bbd
> > > --- /dev/null
> > > +++ b/Documentation/ABI/testing/sysfs-bus-peci
> > > @@ -0,0 +1,16 @@
> > > +What: /sys/bus/peci/rescan
> > > +Date: July 2021
> > > +KernelVersion: 5.15
> > 5.15 was a long time ago :(
> > Other than this nit, these all look semi-sane to me. What tree are you
> > wanting these to go through, mine? If so, can you fix this up (both
> > places in this file) and resend?
> Yes, I recommend Iwona send these through your tree.
> Thanks for taking another look over them. Thanks to Iwona and Intel
> for doing this work.
Can you provide an ack or reviewed-by for them when they are reposted so
I know this?
More information about the Linux-aspeed