# git rev-parse -q --verify cc0bb290a0dabcdbc422fd4721e000ea115a5beb^{commit}
cc0bb290a0dabcdbc422fd4721e000ea115a5beb
already have revision, skipping fetch
# git checkout -q -f -B kisskb cc0bb290a0dabcdbc422fd4721e000ea115a5beb
# git clean -qxdf
# < git log -1
# commit cc0bb290a0dabcdbc422fd4721e000ea115a5beb
# Author: Christophe Leroy <christophe.leroy@c-s.fr>
# Date:   Sun Nov 25 11:48:22 2018 +0000
# 
#     powerpc/book3s32: Implement Kernel Userspace Access Protection
#     
#     This patch implements Kernel Userspace Access Protection for
#     book3s/32.
#     
#     Due to limitations of the processor page protection capabilities,
#     the protection is only against writing. read protection cannot be
#     achieved using page protection.
#     
#     The previous patch modifies the page protection so that RW user
#     pages are RW for Key 0 and RO for Key 1, and it sets Key 0 for
#     both user and kernel.
#     
#     This patch changes userspace segment registers are set to Ku 0
#     and Ks 1. When kernel needs to write to RW pages, the associated
#     segment register is then changed to Ks 0 in order to allow write
#     access to the kernel.
#     
#     In order to avoid having the read all segment registers when
#     locking/unlocking the access, some data is kept in the thread_struct
#     and saved on stack on exceptions. The field identifies both the
#     first unlocked segment and the first segment following the last
#     unlocked one. When no segment is unlocked, it contains value 0.
#     
#     Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
# < /opt/cross/kisskb/br-mipsel-o32-full-2016.08-613-ge98b4dd/bin/mipsel-linux-gcc --version
# < /opt/cross/kisskb/br-mipsel-o32-full-2016.08-613-ge98b4dd/bin/mipsel-linux-ld --version
# < git log --format=%s --max-count=1 cc0bb290a0dabcdbc422fd4721e000ea115a5beb
# < make -s -j 10 ARCH=mips O=/kisskb/build/chleroy_mips-defconfig_mipsel CROSS_COMPILE=/opt/cross/kisskb/br-mipsel-o32-full-2016.08-613-ge98b4dd/bin/mipsel-linux-  defconfig
# make -s -j 10 ARCH=mips O=/kisskb/build/chleroy_mips-defconfig_mipsel CROSS_COMPILE=/opt/cross/kisskb/br-mipsel-o32-full-2016.08-613-ge98b4dd/bin/mipsel-linux-  
FIT description: Linux 5.0.0-gcc0bb290a0da
Created:         Wed Mar  6 11:07:10 2019
 Image 0 (kernel@0)
  Description:  Linux 5.0.0-gcc0bb290a0da
  Created:      Wed Mar  6 11:07:10 2019
  Type:         Kernel Image
  Compression:  gzip compressed
  Data Size:    4504087 Bytes = 4398.52 KiB = 4.30 MiB
  Architecture: MIPS
  OS:           Linux
  Load Address: 0x80100000
  Entry Point:  0x80856370
  Hash algo:    sha1
  Hash value:   1403842db038727b92c30e5db510b3a68e2b7468
 Image 1 (fdt@boston)
  Description:  img,boston Device Tree
  Created:      Wed Mar  6 11:07:10 2019
  Type:         Flat Device Tree
  Compression:  uncompressed
  Data Size:    3793 Bytes = 3.70 KiB = 0.00 MiB
  Architecture: MIPS
  Hash algo:    sha1
  Hash value:   4799f50d688573234da6e9d7701234d394759ef4
 Image 2 (fdt@ni169445)
  Description:  NI 169445 device tree
  Created:      Wed Mar  6 11:07:10 2019
  Type:         Flat Device Tree
  Compression:  uncompressed
  Data Size:    1871 Bytes = 1.83 KiB = 0.00 MiB
  Architecture: MIPS
  Hash algo:    sha1
  Hash value:   51b89b31605ee62038c8468c429af091dfc75ec7
 Image 3 (fdt@xilfpga)
  Description:  MIPSfpga (xilfpga) Device Tree
  Created:      Wed Mar  6 11:07:10 2019
  Type:         Flat Device Tree
  Compression:  uncompressed
  Data Size:    2708 Bytes = 2.64 KiB = 0.00 MiB
  Architecture: MIPS
  Hash algo:    sha1
  Hash value:   63d058b780f65e22da30f0a183433765f1807f1d
 Default Configuration: 'conf@default'
 Configuration 0 (conf@default)
  Description:  Generic Linux kernel
  Kernel:       kernel@0
 Configuration 1 (conf@boston)
  Description:  Boston Linux kernel
  Kernel:       kernel@0
  FDT:          fdt@boston
 Configuration 2 (conf@ni169445)
  Description:  NI 169445 Linux Kernel
  Kernel:       kernel@0
  FDT:          fdt@ni169445
 Configuration 3 (conf@xilfpga)
  Description:  MIPSfpga Linux kernel
  Kernel:       kernel@0
  FDT:          fdt@xilfpga
Completed OK
# rm -rf /kisskb/build/chleroy_mips-defconfig_mipsel
# Build took: 0:03:01.340720