# git rev-parse -q --verify 5f60bb2254dec0233f5190a51b35bb5a2688de94^{commit} 5f60bb2254dec0233f5190a51b35bb5a2688de94 already have revision, skipping fetch # git checkout -q -f -B kisskb 5f60bb2254dec0233f5190a51b35bb5a2688de94 # git clean -qxdf # < git log -1 # commit 5f60bb2254dec0233f5190a51b35bb5a2688de94 # Author: Nicholas Piggin # Date: Fri Sep 13 22:07:01 2019 +1000 # # powerpc/64s: system call support for scv/rfscv instructions # # Add support for the scv instruction on POWER9 and later CPUs. # # For now this implements the zeroth scv vector 'scv 0', as identical # to 'sc' system calls, with the exception that lr is not preserved, and # it is 64-bit only. There may yet be changes made to this ABI, so it's # for testing only. # # rfscv is implemented to return from scv type system calls. It can not # be used to return from sc system calls because those are defined to # preserve lr. # # In a comparison of getpid syscall, the test program had scv taking # about 3 more cycles in user mode (92 vs 89 for sc), due to lr handling. # getpid syscall throughput on POWER9 is improved by 33%, mostly due to # reducing mtmsr and mtspr. # # Signed-off-by: Nicholas Piggin # < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-gcc --version # < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-ld --version # < git log --format=%s --max-count=1 5f60bb2254dec0233f5190a51b35bb5a2688de94 # < make -s -j 8 ARCH=powerpc O=/kisskb/build/npiggin_mpc83xx_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- mpc83xx_defconfig # < make -s -j 8 ARCH=powerpc O=/kisskb/build/npiggin_mpc83xx_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- help # make -s -j 8 ARCH=powerpc O=/kisskb/build/npiggin_mpc83xx_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- olddefconfig # make -s -j 8 ARCH=powerpc O=/kisskb/build/npiggin_mpc83xx_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- /kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl': /kisskb/src/kernel/printk/printk.c:204:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/proc/inode.c: In function 'proc_reg_open': /kisskb/src/include/linux/list.h:72:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/proc/inode.c:338:21: note: 'pdeo' was declared here /kisskb/src/fs/ext4/extents.c: In function 'ext4_convert_unwritten_io_end_vec': /kisskb/src/fs/ext4/extents.c:5009:23: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/tty/serial/8250/8250_core.c: In function 'univ8250_release_irq': /kisskb/src/drivers/tty/serial/8250/8250_core.c:247:18: warning: 'i' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/tty/serial/8250/8250_core.c:227:19: note: 'i' was declared here /kisskb/src/drivers/base/regmap/regmap.c: In function 'regmap_raw_read': /kisskb/src/drivers/base/regmap/regmap.c:2598:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/base/regmap/regmap.c: In function '_regmap_raw_write': /kisskb/src/drivers/base/regmap/regmap.c:1859:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/usb/core/devio.c: In function 'async_completed': /kisskb/src/drivers/usb/core/devio.c:625:23: warning: 'errno' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/io_uring.c: In function '__io_sqe_files_update.isra.81': /kisskb/src/fs/io_uring.c:5819:13: warning: 'err' may be used uninitialized in this function [-Wuninitialized] INFO: Uncompressed kernel (size 0x64444c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x700000) INFO: Uncompressed kernel (size 0x64444c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x700000) INFO: Uncompressed kernel (size 0x64444c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x700000) INFO: Uncompressed kernel (size 0x64444c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x700000) INFO: Uncompressed kernel (size 0x64444c) overlaps the address of the wrapper(0x400000) INFO: Uncompressed kernel (size 0x64444c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x700000) INFO: Fixing the link_address of wrapper to (0x700000) INFO: Uncompressed kernel (size 0x633dcc) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x700000) INFO: Uncompressed kernel (size 0x64444c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x700000) Image Name: Linux-5.6.0-rc2-g5f60bb2254de Created: Thu Feb 27 13:20:59 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 3153336 Bytes = 3079.43 KiB = 3.01 MiB Load Address: 00700000 Entry Point: 00700290 Image Name: Linux-5.6.0-rc2-g5f60bb2254de Created: Thu Feb 27 13:20:59 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 3123709 Bytes = 3050.50 KiB = 2.98 MiB Load Address: 00000000 Entry Point: 00000000 Image Name: Linux-5.6.0-rc2-g5f60bb2254de Created: Thu Feb 27 13:20:59 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 3153987 Bytes = 3080.07 KiB = 3.01 MiB Load Address: 00700000 Entry Point: 00700290 Image Name: Linux-5.6.0-rc2-g5f60bb2254de Created: Thu Feb 27 13:20:59 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 3153056 Bytes = 3079.16 KiB = 3.01 MiB Load Address: 00700000 Entry Point: 00700290 Image Name: Linux-5.6.0-rc2-g5f60bb2254de Created: Thu Feb 27 13:20:59 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 3154217 Bytes = 3080.29 KiB = 3.01 MiB Load Address: 00700000 Entry Point: 00700290 Image Name: Linux-5.6.0-rc2-g5f60bb2254de Created: Thu Feb 27 13:21:00 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 3154198 Bytes = 3080.27 KiB = 3.01 MiB Load Address: 00700000 Entry Point: 00700290 Image Name: Linux-5.6.0-rc2-g5f60bb2254de Created: Thu Feb 27 13:21:00 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 3153973 Bytes = 3080.05 KiB = 3.01 MiB Load Address: 00700000 Entry Point: 00700290 Completed OK # rm -rf /kisskb/build/npiggin_mpc83xx_defconfig_powerpc-gcc4.6 # Build took: 0:01:45.068367