Merge tag 'edac_updates_for_v7.4_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras

Pull EDAC updates from Borislav Petkov:

- Orphan several EDAC drivers: i82975x, x38, xgene, i3200. Th

Merge tag 'edac_updates_for_v7.4_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras

Pull EDAC updates from Borislav Petkov:

- Orphan several EDAC drivers: i82975x, x38, xgene, i3200. Those have
been receiving just drive-by updates and no one really uses them. At
least there are no traces of usage on the mailing lists. So, with the
advent of AI-generated fixes frenzy, and because no one can really
test fixes on those, it is time to sunset them and point them towards
the eternal happy hunting-grounds

- Add a dummy EDAC driver with which the EDAC core glue can be
exercised in a VM for the cases where one does not necessarily have
access to the hardware. This glue should be extended with all the
necessary functionality that needs and can be tested this way

- Add an EDAC driver to reset bitfix filters in Intel hardware. Bitfix
filters are a hw mechanism for tracking stuck bits in memory and CPU
arrays due to, e.g., silicon aging. Those filters can become clogged
by transient errors accumulating over a long system uptime so this
intel-bff (LOL :)) driver glue resets those filters on overflow. Work
by Qiuxu Zhuo and Tony Luck

- Export get_cpu_cacheinfo_id() for use by the new intel-bff driver

- i10nm: Handle the case where hw disables memory controllers which
leads to reporting the wrong memory controller when reporting an
error

- The now-usual AI-powered fixes and other misc cleanups and updates
all over the place

* tag 'edac_updates_for_v7.4_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras:
MAINTAINERS: Orphan drivers/edac/i3200_edac.c
EDAC/skx_base: Fix ambiguous bitwise and logical operator style
EDAC/i10nm: Fix mdev reference leak in i10nm_get_ddr_munits()
MAINTAINERS: Orphan drivers/edac/xgene_edac.c
MAINTAINERS: Orphan drivers/edac/x38_edac.c
MAINTAINERS: Orphan drivers/edac/i82975x_edac.c
EDAC/dummy: Add a dummy EDAC driver
EDAC/ie31200: Disable PCI device when probing fails
EDAC/{bluefield,loongson}: Use named initializers for acpi_device_id
MAINTAINERS: Update Qiuxu Zhuo's email address
EDAC/intel-bff: Report frequent filter overflows
EDAC/intel-bff: Compute unique ID for overflowed filter
EDAC/intel-bff: Reset bitfix filter when it overflows
EDAC/intel-bff: Add Diamond Rapids support
EDAC/intel-bff: Add stub Intel bitfix filter driver
x86/mce: Add enumeration for Intel bitfix filter reset
cacheinfo: Export get_cpu_cacheinfo_id() for loadable modules
EDAC/i10nm: Fix Granite Rapids ADXL MC mapping

show more ...

EDAC/intel-bff: Report frequent filter overflows

If an instance of a bitfix filter contains some transient errors built
up over time, then resetting the filter will free up slots in the filter
to st

EDAC/intel-bff: Report frequent filter overflows

If an instance of a bitfix filter contains some transient errors built
up over time, then resetting the filter will free up slots in the filter
to store persistent errors.

Save a timestamp when "yellow" status is seen and clear the filter.

Log at KERN_WARNING level if the overflow occurred quickly after a
previous overflow on the same bitfix filter instance. Use KERN_NOTICE
for first, or long delayed, overflow.

Co-developed-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
Signed-off-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Link: https://patch.msgid.link/20260828153002.10290-8-tony.luck@intel.com

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EDAC/intel-bff: Compute unique ID for overflowed filter

Each L2 cache instance has its own bitfix filter, but always reports
errors in machine check bank 3 (on Diamond Rapids).

Compute a unique bit

EDAC/intel-bff: Compute unique ID for overflowed filter

Each L2 cache instance has its own bitfix filter, but always reports
errors in machine check bank 3 (on Diamond Rapids).

Compute a unique bitfix filter instance number based on the CPU that
logged the error and the machine check bank number.

Special-case the banks associated with the Integrated Memory Hub (IMH).
Here the "even" numbered CPU modules are associated with IMH0 and the
"odd" modules with IMH1.

The unique id will be used to store a time stamp of when the bitfix
filter overflowed so that frequent overflows can be logged.

Co-developed-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
Signed-off-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Link: https://patch.msgid.link/20260828153002.10290-7-tony.luck@intel.com

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EDAC/intel-bff: Reset bitfix filter when it overflows

Get notifications for all errors logged in machine check banks. Skip any
that do not indicate a bitfix filter overflow.

Machine check banks are

EDAC/intel-bff: Reset bitfix filter when it overflows

Get notifications for all errors logged in machine check banks. Skip any
that do not indicate a bitfix filter overflow.

Machine check banks are scoped to a hardware unit, so the reset has to be
issued from a CPU within that unit. Use the CPU that reported the error.

Co-developed-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
Signed-off-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Link: https://patch.msgid.link/20260828153002.10290-6-tony.luck@intel.com

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EDAC/intel-bff: Add Diamond Rapids support

There are potentially bitfix filters associated with each machine check
bank. Only some banks may implement them.

Machine check banks have varying scope.

EDAC/intel-bff: Add Diamond Rapids support

There are potentially bitfix filters associated with each machine check
bank. Only some banks may implement them.

Machine check banks have varying scope. E.g. there is a separate L2
cache for each module, each instance has its own bitfix filter.

Add information that will be used to map a <cpu,bank> pair to a unique
instance number for a bitfix filter.

Co-developed-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
Signed-off-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Link: https://patch.msgid.link/20260828153002.10290-5-tony.luck@intel.com

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EDAC/intel-bff: Add stub Intel bitfix filter driver

Check if the platform supports threshold based cache error reporting and
the bitfix filter reset feature.

Co-developed-by: Qiuxu Zhuo <qiuxu.zhuo

EDAC/intel-bff: Add stub Intel bitfix filter driver

Check if the platform supports threshold based cache error reporting and
the bitfix filter reset feature.

Co-developed-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
Signed-off-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Link: https://patch.msgid.link/20260828153002.10290-4-tony.luck@intel.com

show more ...