[PATCH v15 0/2] ACPI / APEI: Add support to notify the vendor specific HW errors

[Shiju Jose]

CPER records describing a firmware-first error are identified by GUID.
The ghes driver currently logs, but ignores any unknown CPER records.
This prevents describing errors that can't be represented by a standard
entry, that would otherwise allow a driver to recover from an error.
The UEFI spec calls these 'Non-standard Section Body' (N.2.3 of
version 2.8).

patch set
1. add the notifier chain for these non-standard/vendor-records
   in the ghes driver.

2. add the driver to handle HiSilicon HIP PCIe controller's errors.
   
Changes:

V15:
1. Change in the HIP PCIe error handling driver
   for a comment by Andy Shevchenko.
   Removed "depends on ACPI" as it already depends on
   it through ACPI_APEI_GHES.

V14:
1. Add patch[1] posted by James to the series.
   
2. Following changes made for Bjorn's comments,
2.1 Deleted stub code from ghes.h
2.2 Made CONFIG_PCIE_HISI_ERR depend on CONFIG_ACPI_APEI_GHES.

V13:
1. Following changes in the HIP PCIe error handling driver.
1.1 Add Bjorn's acked-by.
1.2. Address the comments and macros order Bjorn mentioned.
     Fix the words in the commit.

V12:
1. Changed the Signed-off-by tag to Co-developed-by tag in the patch
   "ACPI / APEI: Add a notifier chain for unknown (vendor) CPER records"

V11:
1. Following modifications made by James Morse in the APEI patch
   for the vendor error record.
   - Removed kfifo and ghes_gdata_pool. Expanded commit message.
   
2. Changes in the HIP PCIe error handling driver
   for the comments by Andy Shevchenko.

V10:
1. Changes for Bjorn's comments on HIP PCIe error handler driver
   and APEI patch.
   
2. Changes in the HIP PCIe error handler driver
   for the feedbacks by Andy Shevchenko.
   
V9:
1. Fixed 2 improvements suggested by the kbuild test robot. 
1.1 Change ghes_gdata_pool_init() as static function.
1.2. Removed using buffer to store the error data for
     logging in the hisi_pcie_handle_error()

V8:
1. Removed reporting the standard errors through the interface
   because of the conflict with the recent patches in the
   memory error handling path.
2. Fix comments by Dan Carpenter.
   
V7:
1. Add changes in the APEI driver suggested by Borislav Petkov, for
   queuing up all the non-fatal HW errors to the work queue and
   notify the registered kernel drivers from the bottom half using
   blocking notifier, common interface for both standard and
   vendor-spcific errors.
2. Fix for further feedbacks in v5 HIP PCIe error handler driver
   by Bjorn Helgaas.

V6:
1. Fix few changes in the patch subject line suggested by Bjorn Helgaas.

V5:
1. Fix comments from James Morse.
1.1 Changed the notification method to use the atomic_notifier_chain.
1.2 Add the error handled status for the user space.  

V4:
1. Fix for the following smatch warning in the PCIe error driver,
   reported by kbuild test robot<lkp@xxxxxxxxx>:
   warn: should '((((1))) << (9 + i))' be a 64 bit type?
   if (err->val_bits & BIT(HISI_PCIE_LOCAL_VALID_ERR_MISC + i))
	^^^ This should be BIT_ULL() because it goes up to 9 + 32.

V3:
1. Fix the comments from Bjorn Helgaas.

V2:
1. Changes in the HiSilicon PCIe controller's error handling driver
   for the comments from Bjorn Helgaas.
   
2. Changes in the APEI interface to support reporting the vendor error
   for module with multiple devices, but use the same section type.
   In the error handler will use socket id/sub module id etc to distinguish
   the device.

V1:  
1. Fix comments from James Morse.

2. add driver to handle HiSilicon hip08 PCIe controller's errors,
   which is an application of the above interface.

Shiju Jose (1):
  ACPI / APEI: Add a notifier chain for unknown (vendor) CPER records

Yicong Yang (1):
  PCI: hip: Add handling of HiSilicon HIP PCIe controller errors

 drivers/acpi/apei/ghes.c                 |  63 +++++
 drivers/pci/controller/Kconfig           |   7 +
 drivers/pci/controller/Makefile          |   1 +
 drivers/pci/controller/pcie-hisi-error.c | 327 +++++++++++++++++++++++
 include/acpi/ghes.h                      |  18 ++
 5 files changed, 416 insertions(+)
 create mode 100644 drivers/pci/controller/pcie-hisi-error.c

-- 
2.17.1