Buildresult: mpe/parisc-allnoconfig/parisc-gcc8 built on May 22 2018, 17:35
kisskb
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Status:
OK
Date/Time:
May 22 2018, 17:35
Duration:
0:00:10.940124
Builder:
ka2
Revision:
powerpc/64s: Add support for a store forwarding barrier at kernel entry/exit (
6830fcf476286380beeac027eaa2718cb574438a)
Target:
mpe/parisc-allnoconfig/parisc-gcc8
Branch:
mpe
Compiler:
parisc-gcc8
(hppa-linux-gcc (GCC) 4.6.3)
Config:
allnoconfig
(
download
)
Log:
Download original
Possible warnings (1)
kernel/printk/printk.c:183:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized]
Full Log
# git rev-parse -q --verify 6830fcf476286380beeac027eaa2718cb574438a^{commit} 6830fcf476286380beeac027eaa2718cb574438a already have revision, skipping fetch # git checkout -q -f -B kisskb 6830fcf476286380beeac027eaa2718cb574438a # git clean -qxdf # < git log -1 # commit 6830fcf476286380beeac027eaa2718cb574438a # Author: Nicholas Piggin <npiggin@gmail.com> # Date: Tue May 22 09:00:00 2018 +1000 # # powerpc/64s: Add support for a store forwarding barrier at kernel entry/exit # # commit a048a07d7f4535baa4cbad6bc024f175317ab938 upstream. # # 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 <npiggin@gmail.com> # Signed-off-by: Mauricio Faria de Oliveira <mauricfo@linux.vnet.ibm.com> # Signed-off-by: Michael Neuling <mikey@neuling.org> # Signed-off-by: Michal Suchánek <msuchanek@suse.de> # Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> # Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> # < /opt/cross/kisskb/gcc-4.6.3-nolibc/hppa-linux/bin/hppa-linux-gcc --version # < git log --format=%s --max-count=1 6830fcf476286380beeac027eaa2718cb574438a # < make -s -j 48 ARCH=parisc O=/kisskb/build/mpe_parisc-allnoconfig_parisc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/hppa-linux/bin/hppa-linux- allnoconfig # make -s -j 48 ARCH=parisc O=/kisskb/build/mpe_parisc-allnoconfig_parisc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/hppa-linux/bin/hppa-linux- /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] Completed OK # rm -rf /kisskb/build/mpe_parisc-allnoconfig_parisc # Build took: 0:00:10.940124
© Michael Ellerman 2006-2018.