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[0/6] Enhance AMD SMN Error Checking

Message ID 20230516202430.4157216-1-yazen.ghannam@amd.com (mailing list archive)
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Series Enhance AMD SMN Error Checking | expand

Message

Yazen Ghannam May 16, 2023, 8:24 p.m. UTC 
Hi all,

This set implements more robust error checking for AMD System Management
Network (SMN) accesses.

This set is a follow up to this discussion:
https://lore.kernel.org/lkml/20230403164244.471141-1-yazen.ghannam@amd.com/

Patches 1-3:
	- Pre-patches in AMD64 EDAC and K10Temp modules.
	- Required in order to avoid build warnings with the
	  introduction of the __must_check attribute in patch 4.
Patch 4:
	- Introduces __must_check attribute for SMN access functions.
	- Handles "PCI Error Response" behavior for SMN reads.
Patches 5-6:
	- Optional cleanup patches in k10temp.
	- Not required for the SMN access issue, but I thought they may
	  be good to do.

I've included x86 platform driver folks for awareness, since there are
some AMD SMN users there.

Thanks,
Yazen

Yazen Ghannam (6):
  EDAC/amd64: Remove unused register accesses
  EDAC/amd64: Check return value of amd_smn_read()
  hwmon: (k10temp) Check return value of amd_smn_read()
  x86/amd_nb: Enhance SMN access error checking
  hwmon: (k10temp) Define helper function to read CCD temp
  hwmon: (k10temp) Reduce k10temp_get_ccd_support() parameters

 arch/x86/include/asm/amd_nb.h |  4 +--
 arch/x86/kernel/amd_nb.c      | 46 +++++++++++++++++++++++++----
 drivers/edac/amd64_edac.c     | 55 ++++++++++++++++++-----------------
 drivers/edac/amd64_edac.h     |  4 ---
 drivers/hwmon/k10temp.c       | 45 ++++++++++++++++++----------
 5 files changed, 100 insertions(+), 54 deletions(-)