# git rev-parse -q --verify b03897cf318dfc47de33a7ecbc7655584266f034^{commit} b03897cf318dfc47de33a7ecbc7655584266f034 already have revision, skipping fetch # git checkout -q -f -B kisskb b03897cf318dfc47de33a7ecbc7655584266f034 # git clean -qxdf # < git log -1 # commit b03897cf318dfc47de33a7ecbc7655584266f034 # Author: Gautham R. Shenoy # Date: Wed Jul 18 14:03:16 2018 +0530 # # powerpc/powernv: Fix save/restore of SPRG3 on entry/exit from stop (idle) # # On 64-bit servers, SPRN_SPRG3 and its userspace read-only mirror # SPRN_USPRG3 are used as userspace VDSO write and read registers # respectively. # # SPRN_SPRG3 is lost when we enter stop4 and above, and is currently not # restored. As a result, any read from SPRN_USPRG3 returns zero on an # exit from stop4 (Power9 only) and above. # # Thus in this situation, on POWER9, any call from sched_getcpu() always # returns zero, as on powerpc, we call __kernel_getcpu() which relies # upon SPRN_USPRG3 to report the CPU and NUMA node information. # # Fix this by restoring SPRN_SPRG3 on wake up from a deep stop state # with the sprg_vdso value that is cached in PACA. # # Fixes: e1c1cfed5432 ("powerpc/powernv: Save/Restore additional SPRs for stop4 cpuidle") # Cc: stable@vger.kernel.org # v4.14+ # Reported-by: Florian Weimer # Signed-off-by: Gautham R. Shenoy # Reviewed-by: Michael Ellerman # Signed-off-by: Michael Ellerman # < /opt/cross/kisskb/gcc-5.3.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version # < git log --format=%s --max-count=1 b03897cf318dfc47de33a7ecbc7655584266f034 # < make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-fixes_mpc85xx_smp_defconfig_powerpc-5.3 CROSS_COMPILE=/opt/cross/kisskb/gcc-5.3.0-nolibc/powerpc64-linux/bin/powerpc64-linux- mpc85xx_smp_defconfig # make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-fixes_mpc85xx_smp_defconfig_powerpc-5.3 CROSS_COMPILE=/opt/cross/kisskb/gcc-5.3.0-nolibc/powerpc64-linux/bin/powerpc64-linux- /kisskb/src/net/Makefile:24: CC cannot link executables. Skipping bpfilter. /kisskb/src/net/Makefile:24: CC cannot link executables. Skipping bpfilter. In file included from /kisskb/src/include/linux/kernel.h:10:0, from /kisskb/src/include/linux/list.h:9, from /kisskb/src/include/linux/module.h:9, from /kisskb/src/drivers/net/ethernet/freescale/fs_enet/mac-scc.c:15: /kisskb/src/drivers/net/ethernet/freescale/fs_enet/mac-scc.c: In function 'allocate_bd': /kisskb/src/include/linux/err.h:22:49: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] #define IS_ERR_VALUE(x) unlikely((unsigned long)(void *)(x) >= (unsigned long)-MAX_ERRNO) ^ /kisskb/src/include/linux/compiler.h:77:42: note: in definition of macro 'unlikely' # define unlikely(x) __builtin_expect(!!(x), 0) ^ /kisskb/src/drivers/net/ethernet/freescale/fs_enet/mac-scc.c:139:6: note: in expansion of macro 'IS_ERR_VALUE' if (IS_ERR_VALUE(fep->ring_mem_addr)) ^ arch/powerpc/boot/mpc8555cds.dtb: Warning (pci_device_bus_num): /pci@e0008000/i8259@19000:bus-range: PCI bus number 1 out of range, expected (0 - 0) arch/powerpc/boot/mpc8541cds.dtb: Warning (pci_device_bus_num): /pci@e0008000/i8259@19000:bus-range: PCI bus number 1 out of range, expected (0 - 0) INFO: Uncompressed kernel (size 0xbf36e4) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xbf36e4) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xbf36e4) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xbf36e4) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xbf36e4) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xbf36e4) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xbf36e4) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xbf36e4) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xbf36e4) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xbf36e4) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xbf36e4) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xbf36e4) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xbf36e4) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xbf36e4) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xbf36e4) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xbe2f2c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) Image Name: Linux-4.18.0-rc3-gb03897c Created: Thu Jul 19 02:28:03 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5896716 Bytes = 5758.51 kB = 5.62 MB Load Address: 00c00000 Entry Point: 00c0020c Image Name: Linux-4.18.0-rc3-gb03897c Created: Thu Jul 19 02:28:03 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5895179 Bytes = 5757.01 kB = 5.62 MB Load Address: 00c00000 Entry Point: 00c0020c Image Name: Linux-4.18.0-rc3-gb03897c Created: Thu Jul 19 02:28:03 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5895011 Bytes = 5756.85 kB = 5.62 MB Load Address: 00c00000 Entry Point: 00c0020c Image Name: Linux-4.18.0-rc3-gb03897c Created: Thu Jul 19 02:28:03 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5895094 Bytes = 5756.93 kB = 5.62 MB Load Address: 00c00000 Entry Point: 00c00278 Image Name: Linux-4.18.0-rc3-gb03897c Created: Thu Jul 19 02:28:03 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5871611 Bytes = 5734.00 kB = 5.60 MB Load Address: 00000000 Entry Point: 00000000 Image Name: Linux-4.18.0-rc3-gb03897c Created: Thu Jul 19 02:28:03 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5895347 Bytes = 5757.17 kB = 5.62 MB Load Address: 00c00000 Entry Point: 00c0020c Image Name: Linux-4.18.0-rc3-gb03897c Created: Thu Jul 19 02:28:03 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5896723 Bytes = 5758.52 kB = 5.62 MB Load Address: 00c00000 Entry Point: 00c0020c Image Name: Linux-4.18.0-rc3-gb03897c Created: Thu Jul 19 02:28:03 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5895263 Bytes = 5757.09 kB = 5.62 MB Load Address: 00c00000 Entry Point: 00c00278 Image Name: Linux-4.18.0-rc3-gb03897c Created: Thu Jul 19 02:28:03 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5895257 Bytes = 5757.09 kB = 5.62 MB Load Address: 00c00000 Entry Point: 00c0020c Image Name: Linux-4.18.0-rc3-gb03897c Created: Thu Jul 19 02:28:03 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5895016 Bytes = 5756.85 kB = 5.62 MB Load Address: 00c00000 Entry Point: 00c0020c Image Name: Linux-4.18.0-rc3-gb03897c Created: Thu Jul 19 02:28:03 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5896520 Bytes = 5758.32 kB = 5.62 MB Load Address: 00c00000 Entry Point: 00c0020c Image Name: Linux-4.18.0-rc3-gb03897c Created: Thu Jul 19 02:28:03 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5895140 Bytes = 5756.97 kB = 5.62 MB Load Address: 00c00000 Entry Point: 00c0020c Image Name: Linux-4.18.0-rc3-gb03897c Created: Thu Jul 19 02:28:03 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5895101 Bytes = 5756.93 kB = 5.62 MB Load Address: 00c00000 Entry Point: 00c00278 Image Name: Linux-4.18.0-rc3-gb03897c Created: Thu Jul 19 02:28:03 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5896422 Bytes = 5758.22 kB = 5.62 MB Load Address: 00c00000 Entry Point: 00c0020c Image Name: Linux-4.18.0-rc3-gb03897c Created: Thu Jul 19 02:28:03 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5895038 Bytes = 5756.87 kB = 5.62 MB Load Address: 00c00000 Entry Point: 00c00278 Image Name: Linux-4.18.0-rc3-gb03897c Created: Thu Jul 19 02:28:03 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5895096 Bytes = 5756.93 kB = 5.62 MB Load Address: 00c00000 Entry Point: 00c00278 Completed OK # rm -rf /kisskb/build/powerpc-fixes_mpc85xx_smp_defconfig_powerpc-5.3 # Build took: 0:01:54.767413