# git rev-parse -q --verify a048a07d7f4535baa4cbad6bc024f175317ab938^{commit} a048a07d7f4535baa4cbad6bc024f175317ab938 already have revision, skipping fetch # git checkout -q -f -B kisskb a048a07d7f4535baa4cbad6bc024f175317ab938 # git clean -qxdf # < git log -1 # commit a048a07d7f4535baa4cbad6bc024f175317ab938 # Author: Nicholas Piggin # Date: Tue May 22 09:00:00 2018 +1000 # # powerpc/64s: Add support for a store forwarding barrier at kernel entry/exit # # On some CPUs we can prevent a vulnerability related to store-to-load # forwarding by preventing store forwarding between privilege domains, # by inserting a barrier in kernel entry and exit paths. # # This is known to be the case on at least Power7, Power8 and Power9 # powerpc CPUs. # # Barriers must be inserted generally before the first load after moving # to a higher privilege, and after the last store before moving to a # lower privilege, HV and PR privilege transitions must be protected. # # Barriers are added as patch sections, with all kernel/hypervisor entry # points patched, and the exit points to lower privilge levels patched # similarly to the RFI flush patching. # # Firmware advertisement is not implemented yet, so CPU flush types # are hard coded. # # Thanks to Michal Suchánek for bug fixes and review. # # Signed-off-by: Nicholas Piggin # Signed-off-by: Mauricio Faria de Oliveira # Signed-off-by: Michael Neuling # Signed-off-by: Michal Suchánek # Signed-off-by: Michael Ellerman # Signed-off-by: Linus Torvalds # < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-gcc --version # < git log --format=%s --max-count=1 a048a07d7f4535baa4cbad6bc024f175317ab938 # < make -s -j 48 ARCH=powerpc O=/kisskb/build/linus_mpc85xx_defconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- mpc85xx_defconfig # make -s -j 48 ARCH=powerpc O=/kisskb/build/linus_mpc85xx_defconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- /kisskb/src/kernel/cgroup/cgroup-v1.c: In function 'cgroup1_mount': /kisskb/src/kernel/cgroup/cgroup-v1.c:1268:20: warning: 'root' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/sound/soc/codecs/wm8960.c: In function 'wm8960_configure_clocking': /kisskb/src/sound/soc/codecs/wm8960.c:803:70: warning: 'j' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/sound/soc/codecs/wm8960.c:800:68: warning: 'i' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl': /kisskb/src/kernel/printk/printk.c:183:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/mm/hugetlb.c: In function 'alloc_pool_huge_page': /kisskb/src/mm/hugetlb.c:1433:5: warning: 'page' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/base/regmap/regmap.c: In function 'regmap_raw_read': /kisskb/src/drivers/base/regmap/regmap.c:2497:6: 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:1819:6: warning: 'ret' 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:65:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/proc/inode.c:340:21: note: 'pdeo' was declared here /kisskb/src/drivers/net/ethernet/freescale/fs_enet/mac-scc.c: In function 'allocate_bd': /kisskb/src/drivers/net/ethernet/freescale/fs_enet/mac-scc.c:139:6: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] /kisskb/src/drivers/tty/serial/8250/8250_core.c: In function 'univ8250_release_irq': /kisskb/src/drivers/tty/serial/8250/8250_core.c:251:18: warning: 'i' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/tty/serial/8250/8250_core.c:231:19: note: 'i' was declared here 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) 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) INFO: Uncompressed kernel (size 0xb61418) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb61418) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb61418) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb61418) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb61418) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb61418) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb61418) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb61418) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb61418) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb61418) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb61418) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb61418) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb61418) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb61418) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb61418) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb50ccc) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) Image Name: Linux-4.17.0-rc6-ga048a07 Created: Tue May 22 19:28:31 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5481023 Bytes = 5352.56 kB = 5.23 MB Load Address: 00000000 Entry Point: 00000000 Image Name: Linux-4.17.0-rc6-ga048a07 Created: Tue May 22 19:28:31 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5504760 Bytes = 5375.74 kB = 5.25 MB Load Address: 00c00000 Entry Point: 00c00248 Image Name: Linux-4.17.0-rc6-ga048a07 Created: Tue May 22 19:28:31 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5505001 Bytes = 5375.98 kB = 5.25 MB Load Address: 00c00000 Entry Point: 00c00248 Image Name: Linux-4.17.0-rc6-ga048a07 Created: Tue May 22 19:28:33 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5505009 Bytes = 5375.99 kB = 5.25 MB Load Address: 00c00000 Entry Point: 00c00248 Image Name: Linux-4.17.0-rc6-ga048a07 Created: Tue May 22 19:28:33 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5505086 Bytes = 5376.06 kB = 5.25 MB Load Address: 00c00000 Entry Point: 00c00288 Image Name: Linux-4.17.0-rc6-ga048a07 Created: Tue May 22 19:28:33 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5504821 Bytes = 5375.80 kB = 5.25 MB Load Address: 00c00000 Entry Point: 00c00248 Image Name: Linux-4.17.0-rc6-ga048a07 Created: Tue May 22 19:28:33 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5505941 Bytes = 5376.90 kB = 5.25 MB Load Address: 00c00000 Entry Point: 00c00248 Image Name: Linux-4.17.0-rc6-ga048a07 Created: Tue May 22 19:28:34 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5506352 Bytes = 5377.30 kB = 5.25 MB Load Address: 00c00000 Entry Point: 00c00248 Image Name: Linux-4.17.0-rc6-ga048a07 Created: Tue May 22 19:28:34 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5506383 Bytes = 5377.33 kB = 5.25 MB Load Address: 00c00000 Entry Point: 00c00248 Image Name: Linux-4.17.0-rc6-ga048a07 Created: Tue May 22 19:28:34 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5505006 Bytes = 5375.98 kB = 5.25 MB Load Address: 00c00000 Entry Point: 00c00248 Image Name: Linux-4.17.0-rc6-ga048a07 Created: Tue May 22 19:28:33 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5505472 Bytes = 5376.44 kB = 5.25 MB Load Address: 00c00000 Entry Point: 00c00248 Image Name: Linux-4.17.0-rc6-ga048a07 Created: Tue May 22 19:28:34 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5504803 Bytes = 5375.78 kB = 5.25 MB Load Address: 00c00000 Entry Point: 00c00288 Image Name: Linux-4.17.0-rc6-ga048a07 Created: Tue May 22 19:28:34 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5504679 Bytes = 5375.66 kB = 5.25 MB Load Address: 00c00000 Entry Point: 00c00288 Image Name: Linux-4.17.0-rc6-ga048a07 Created: Tue May 22 19:28:34 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5505011 Bytes = 5375.99 kB = 5.25 MB Load Address: 00c00000 Entry Point: 00c00288 Image Name: Linux-4.17.0-rc6-ga048a07 Created: Tue May 22 19:28:34 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5505048 Bytes = 5376.02 kB = 5.25 MB Load Address: 00c00000 Entry Point: 00c00248 Image Name: Linux-4.17.0-rc6-ga048a07 Created: Tue May 22 19:28:34 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5504802 Bytes = 5375.78 kB = 5.25 MB Load Address: 00c00000 Entry Point: 00c00288 Completed OK # rm -rf /kisskb/build/linus_mpc85xx_defconfig_powerpc # Build took: 0:01:31.685294