# git rev-parse -q --verify d37823c3528e5e0705fc7746bcbc2afffb619259^{commit}
d37823c3528e5e0705fc7746bcbc2afffb619259
already have revision, skipping fetch
# git checkout -q -f -B kisskb d37823c3528e5e0705fc7746bcbc2afffb619259
# git clean -qxdf
# < git log -1
# commit d37823c3528e5e0705fc7746bcbc2afffb619259
# Author: Christophe Leroy <christophe.leroy@csgroup.eu>
# Date:   Mon Jan 10 15:29:25 2022 +0000
# 
#     powerpc/32s: Fix kasan_init_region() for KASAN
#     
#     It has been reported some configuration where the kernel doesn't
#     boot with KASAN enabled.
#     
#     This is due to wrong BAT allocation for the KASAN area:
#     
#             ---[ Data Block Address Translation ]---
#             0: 0xc0000000-0xcfffffff 0x00000000       256M Kernel rw      m
#             1: 0xd0000000-0xdfffffff 0x10000000       256M Kernel rw      m
#             2: 0xe0000000-0xefffffff 0x20000000       256M Kernel rw      m
#             3: 0xf8000000-0xf9ffffff 0x2a000000        32M Kernel rw      m
#             4: 0xfa000000-0xfdffffff 0x2c000000        64M Kernel rw      m
#     
#     A BAT must have both virtual and physical addresses alignment matching
#     the size of the BAT. This is not the case for BAT 4 above.
#     
#     Fix kasan_init_region() by using block_size() function that is in
#     book3s32/mmu.c. To be able to reuse it here, make it non static and
#     change its name to bat_block_size() in order to avoid name conflict
#     with block_size() defined in <linux/blkdev.h>
#     
#     Also reuse find_free_bat() to avoid an error message from setbat()
#     when no BAT is available.
#     
#     And allocate memory outside of linear memory mapping to avoid
#     wasting that precious space.
#     
#     With this change we get correct alignment for BATs and KASAN shadow
#     memory is allocated outside the linear memory space.
#     
#             ---[ Data Block Address Translation ]---
#             0: 0xc0000000-0xcfffffff 0x00000000       256M Kernel rw
#             1: 0xd0000000-0xdfffffff 0x10000000       256M Kernel rw
#             2: 0xe0000000-0xefffffff 0x20000000       256M Kernel rw
#             3: 0xf8000000-0xfbffffff 0x7c000000        64M Kernel rw
#             4: 0xfc000000-0xfdffffff 0x7a000000        32M Kernel rw
#     
#     Fixes: 7974c4732642 ("powerpc/32s: Implement dedicated kasan_init_region()")
#     Cc: stable@vger.kernel.org
#     Reported-by: Maxime Bizon <mbizon@freebox.fr>
#     Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
#     Tested-by: Maxime Bizon <mbizon@freebox.fr>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/7a50ef902494d1325227d47d33dada01e52e5518.1641818726.git.christophe.leroy@csgroup.eu
# < /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 d37823c3528e5e0705fc7746bcbc2afffb619259
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_ppc44x_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  ppc44x_defconfig
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_ppc44x_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  help
# make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_ppc44x_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  olddefconfig
# make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_ppc44x_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-fixes_ppc44x_defconfig_powerpc-gcc5
# Build took: 0:01:03.166335