# git rev-parse -q --verify bbbca72352bb9484bc057c91a408332b35ee8f4c^{commit}
bbbca72352bb9484bc057c91a408332b35ee8f4c
already have revision, skipping fetch
# git checkout -q -f -B kisskb bbbca72352bb9484bc057c91a408332b35ee8f4c
# git clean -qxdf
# < git log -1
# commit bbbca72352bb9484bc057c91a408332b35ee8f4c
# Author: Vaibhav Jain <vaibhav@linux.ibm.com>
# Date:   Tue Jan 25 01:52:04 2022 +0530
# 
#     powerpc/papr_scm: Implement initial support for injecting smart errors
#     
#     Presently PAPR doesn't support injecting smart errors on an
#     NVDIMM. This makes testing the NVDIMM health reporting functionality
#     difficult as simulating NVDIMM health related events need a hacked up
#     qemu version.
#     
#     To solve this problem this patch proposes simulating certain set of
#     NVDIMM health related events in papr_scm. Specifically 'fatal' health
#     state and 'dirty' shutdown state. These error can be injected via the
#     user-space 'ndctl-inject-smart(1)' command. With the proposed patch and
#     corresponding ndctl patches following command flow is expected:
#     
#     $ sudo ndctl list -DH -d nmem0
#     ...
#           "health_state":"ok",
#           "shutdown_state":"clean",
#     ...
#      # inject unsafe shutdown and fatal health error
#     $ sudo ndctl inject-smart nmem0 -Uf
#     ...
#           "health_state":"fatal",
#           "shutdown_state":"dirty",
#     ...
#      # uninject all errors
#     $ sudo ndctl inject-smart nmem0 -N
#     ...
#           "health_state":"ok",
#           "shutdown_state":"clean",
#     ...
#     
#     The patch adds a new member 'health_bitmap_inject_mask' inside struct
#     papr_scm_priv which is then bitwise ANDed to the health bitmap fetched from the
#     hypervisor. The value for 'health_bitmap_inject_mask' is accessible from sysfs
#     at nmemX/papr/health_bitmap_inject.
#     
#     A new PDSM named 'SMART_INJECT' is proposed that accepts newly
#     introduced 'struct nd_papr_pdsm_smart_inject' as payload thats
#     exchanged between libndctl and papr_scm to indicate the requested
#     smart-error states.
#     
#     When the processing the PDSM 'SMART_INJECT', papr_pdsm_smart_inject()
#     constructs a pair or 'inject_mask' and 'clear_mask' bitmaps from the payload
#     and bit-blt it to the 'health_bitmap_inject_mask'. This ensures the after being
#     fetched from the hypervisor, the health_bitmap reflects requested smart-error
#     states.
#     
#     Signed-off-by: Vaibhav Jain <vaibhav@linux.ibm.com>
#     Signed-off-by: Shivaprasad G Bhat <sbhat@linux.ibm.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20220124202204.1488346-1-vaibhav@linux.ibm.com
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version
# < git log --format=%s --max-count=1 bbbca72352bb9484bc057c91a408332b35ee8f4c
# < make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-next_40x_walnut_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  40x/walnut_defconfig
# < make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-next_40x_walnut_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  help
# make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-next_40x_walnut_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  olddefconfig
# make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-next_40x_walnut_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
Completed OK
# rm -rf /kisskb/build/powerpc-next_40x_walnut_defconfig_powerpc-gcc5
# Build took: 0:00:26.174846