# git rev-parse -q --verify 2e2e7910e6eccaed0c3bce8125e60e16d19dfc29^{commit} 2e2e7910e6eccaed0c3bce8125e60e16d19dfc29 already have revision, skipping fetch # git checkout -q -f -B kisskb 2e2e7910e6eccaed0c3bce8125e60e16d19dfc29 # git clean -qxdf # < git log -1 # commit 2e2e7910e6eccaed0c3bce8125e60e16d19dfc29 # 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 # (cherry picked from commit a048a07d7f4535baa4cbad6bc024f175317ab938) # < /opt/cross/kisskb/gcc-5.3.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version # < git log --format=%s --max-count=1 2e2e7910e6eccaed0c3bce8125e60e16d19dfc29 # < make -s -j 80 ARCH=powerpc O=/kisskb/build/mpe_ppc6xx_defconfig_powerpc-5.3 CROSS_COMPILE=/opt/cross/kisskb/gcc-5.3.0-nolibc/powerpc64-linux/bin/powerpc64-linux- ppc6xx_defconfig # make -s -j 80 ARCH=powerpc O=/kisskb/build/mpe_ppc6xx_defconfig_powerpc-5.3 CROSS_COMPILE=/opt/cross/kisskb/gcc-5.3.0-nolibc/powerpc64-linux/bin/powerpc64-linux- In file included from /kisskb/src/sound/ppc/pmac.h:25:0, from /kisskb/src/sound/ppc/awacs.c:29: /kisskb/src/sound/ppc/awacs.c: In function 'snd_pmac_awacs_init': /kisskb/src/include/sound/control.h:223:9: warning: 'speaker_vol' may be used uninitialized in this function [-Wmaybe-uninitialized] return _snd_ctl_add_slave(master, slave, 0); ^ /kisskb/src/sound/ppc/awacs.c:886:36: note: 'speaker_vol' was declared here struct snd_kcontrol *master_vol, *speaker_vol; ^ /kisskb/src/drivers/input/joystick/analog.c:176:2: warning: #warning Precise timer not defined for this architecture. [-Wcpp] #warning Precise timer not defined for this architecture. ^ WARNING: modpost: Found 1 section mismatch(es). To see full details build your kernel with: 'make CONFIG_DEBUG_SECTION_MISMATCH=y' INFO: Uncompressed kernel (size 0xa44b90) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa44b90) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa44b90) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa44b90) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa44b90) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa44b90) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa44b90) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa44b90) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa44b90) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa44b90) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa34438) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa34438) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) Image Name: Linux-4.14.43+ Created: Thu May 24 02:26:30 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4857556 Bytes = 4743.71 kB = 4.63 MB Load Address: 00b00000 Entry Point: 00b001f4 Image Name: Linux-4.14.43+ Created: Thu May 24 02:26:31 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4832239 Bytes = 4718.98 kB = 4.61 MB Load Address: 00000000 Entry Point: 00000000 Image Name: Linux-4.14.43+ Created: Thu May 24 02:26:31 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4857528 Bytes = 4743.68 kB = 4.63 MB Load Address: 00b00000 Entry Point: 00b001f4 Image Name: Linux-4.14.43+ Created: Thu May 24 02:26:31 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4857025 Bytes = 4743.19 kB = 4.63 MB Load Address: 00b00000 Entry Point: 00b007a0 Image Name: Linux-4.14.43+ Created: Thu May 24 02:26:31 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4857009 Bytes = 4743.17 kB = 4.63 MB Load Address: 00b00000 Entry Point: 00b001f4 Image Name: Linux-4.14.43+ Created: Thu May 24 02:26:32 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4857114 Bytes = 4743.28 kB = 4.63 MB Load Address: 00b00000 Entry Point: 00b007a0 Image Name: Linux-4.14.43+ Created: Thu May 24 02:26:32 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4857260 Bytes = 4743.42 kB = 4.63 MB Load Address: 00b00000 Entry Point: 00b001f4 Image Name: Linux-4.14.43+ Created: Thu May 24 02:26:32 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4857508 Bytes = 4743.66 kB = 4.63 MB Load Address: 00b00000 Entry Point: 00b001f4 Image Name: Linux-4.14.43+ Created: Thu May 24 02:26:33 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4857516 Bytes = 4743.67 kB = 4.63 MB Load Address: 00b00000 Entry Point: 00b001f4 Completed OK # rm -rf /kisskb/build/mpe_ppc6xx_defconfig_powerpc-5.3 # Build took: 0:03:22.499777