mainline inclusion
from mainline-v5.15-rc1
commit cf4e6d52
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I5HAC1
CVE: NA

Intel-SIG: commit cf4e6d52 EDAC/i10nm: Retrieve and print
retry_rd_err_log registers.
Backport for EDAC retry_rd_err_log for ICX/SPR support.

--------------------------------

Retrieve and print retry_rd_err_log registers like the earlier change:
commit e80634a7 ("EDAC, skx: Retrieve and print retry_rd_err_log registers")

This is a little trickier than on Skylake because of potential
interference with BIOS use of the same registers. The default
behavior is to ignore these registers.

A module parameter retry_rd_err_log(default=0) controls the mode of operation:
- 0=off  : Default.
- 1=bios : Linux doesn't reset any control bits, but just reports values.
           This is "no harm" mode, but it may miss reporting some data.
- 2=linux: Linux tries to take control and resets mode bits,
           clears valid/UC bits after reading. This should be
           more reliable (especially if BIOS interference is reduced
           by disabling eMCA reporting mode in BIOS setup).
Co-developed-by: NQiuxu Zhuo <qiuxu.zhuo@intel.com>
Signed-off-by: NQiuxu Zhuo <qiuxu.zhuo@intel.com>
Signed-off-by: NYouquan Song <youquan.song@intel.com>
Signed-off-by: NTony Luck <tony.luck@intel.com>
Link: https://lore.kernel.org/r/20210818175701.1611513-3-tony.luck@intel.comSigned-off-by: NYouquan Song <youquan.song@intel.com>