# 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/arcompact-buildroot-2015.08.1/bin/arc-buildroot-linux-uclibc-gcc --version # < git log --format=%s --max-count=1 2e2e7910e6eccaed0c3bce8125e60e16d19dfc29 # < make -s -j 48 ARCH=arc O=/kisskb/build/mpe_axs101_defconfig_arcompact CROSS_COMPILE=/opt/cross/kisskb/arcompact-buildroot-2015.08.1/bin/arc-buildroot-linux-uclibc- axs101_defconfig # Added to kconfig CONFIG_INITRAMFS_SOURCE="" # yes \n | make -s -j 48 ARCH=arc O=/kisskb/build/mpe_axs101_defconfig_arcompact CROSS_COMPILE=/opt/cross/kisskb/arcompact-buildroot-2015.08.1/bin/arc-buildroot-linux-uclibc- oldconfig yes: standard output: Broken pipe yes: write error # make -s -j 48 ARCH=arc O=/kisskb/build/mpe_axs101_defconfig_arcompact CROSS_COMPILE=/opt/cross/kisskb/arcompact-buildroot-2015.08.1/bin/arc-buildroot-linux-uclibc- /kisskb/src/kernel/sched/core.c: In function 'pick_next_task': /kisskb/src/kernel/sched/core.c:3237:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ In file included from /kisskb/src/include/asm-generic/bug.h:16:0, from /kisskb/src/arch/arc/include/asm/bug.h:31, from /kisskb/src/include/linux/bug.h:5, from /kisskb/src/include/linux/mmdebug.h:5, from /kisskb/src/include/linux/gfp.h:5, from /kisskb/src/include/linux/slab.h:15, from /kisskb/src/mm/nobootmem.c:14: /kisskb/src/mm/nobootmem.c: In function '__free_pages_memory': /kisskb/src/include/linux/kernel.h:791:16: warning: comparison of distinct pointer types lacks a cast [enabled by default] (void) (&min1 == &min2); \ ^ /kisskb/src/include/linux/kernel.h:800:2: note: in expansion of macro '__min' __min(typeof(x), typeof(y), \ ^ /kisskb/src/mm/nobootmem.c:104:11: note: in expansion of macro 'min' order = min(MAX_ORDER - 1UL, __ffs(start)); ^ /kisskb/src/block/cfq-iosched.c: In function 'cfq_async_queue_prio': /kisskb/src/block/cfq-iosched.c:3804:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ /kisskb/src/lib/string.c: In function 'fortify_panic': /kisskb/src/lib/string.c:1053:1: warning: 'noreturn' function does return [enabled by default] } ^ /kisskb/src/net/core/ethtool.c: In function 'ethtool_get_feature_mask': /kisskb/src/net/core/ethtool.c:311:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ In file included from /kisskb/src/fs/ext4/ext4_jbd2.c:6:0: /kisskb/src/fs/ext4/ext4_jbd2.h: In function 'ext4_inode_journal_mode': /kisskb/src/fs/ext4/ext4_jbd2.h:426:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ In file included from /kisskb/src/fs/ext4/extents.c:43:0: /kisskb/src/fs/ext4/ext4_jbd2.h: In function 'ext4_inode_journal_mode': /kisskb/src/fs/ext4/ext4_jbd2.h:426:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ /kisskb/src/net/ipv4/tcp_input.c: In function 'tcp_data_queue': /kisskb/src/net/ipv4/tcp_input.c:4259:49: warning: array subscript is above array bounds [-Warray-bounds] tp->selective_acks[i-1] = tp->selective_acks[i]; ^ In file included from /kisskb/src/include/linux/sunrpc/svcsock.h:14:0, from /kisskb/src/net/sunrpc/svcsock.c:53: /kisskb/src/include/linux/sunrpc/svc_xprt.h: In function 'svc_addr_len': /kisskb/src/include/linux/sunrpc/svc_xprt.h:180:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ /kisskb/src/drivers/scsi/sd.c: In function 'sd_init_command': /kisskb/src/drivers/scsi/sd.c:1290:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ In file included from /kisskb/src/fs/ext4/file.c:31:0: /kisskb/src/fs/ext4/ext4_jbd2.h: In function 'ext4_inode_journal_mode': /kisskb/src/fs/ext4/ext4_jbd2.h:426:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ In file included from /kisskb/src/fs/ext4/fsync.c:33:0: /kisskb/src/fs/ext4/ext4_jbd2.h: In function 'ext4_inode_journal_mode': /kisskb/src/fs/ext4/ext4_jbd2.h:426:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ In file included from /kisskb/src/fs/ext4/inline.c:17:0: /kisskb/src/fs/ext4/ext4_jbd2.h: In function 'ext4_inode_journal_mode': /kisskb/src/fs/ext4/ext4_jbd2.h:426:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ In file included from /kisskb/src/fs/ext4/indirect.c:24:0: /kisskb/src/fs/ext4/ext4_jbd2.h: In function 'ext4_inode_journal_mode': /kisskb/src/fs/ext4/ext4_jbd2.h:426:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ In file included from /kisskb/src/fs/ext4/inode.c:43:0: /kisskb/src/fs/ext4/ext4_jbd2.h: In function 'ext4_inode_journal_mode': /kisskb/src/fs/ext4/ext4_jbd2.h:426:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ In file included from /kisskb/src/fs/ext4/mballoc.c:24:0: /kisskb/src/fs/ext4/ext4_jbd2.h: In function 'ext4_inode_journal_mode': /kisskb/src/fs/ext4/ext4_jbd2.h:426:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ In file included from /kisskb/src/fs/ext4/move_extent.c:19:0: /kisskb/src/fs/ext4/ext4_jbd2.h: In function 'ext4_inode_journal_mode': /kisskb/src/fs/ext4/ext4_jbd2.h:426:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ Completed OK # rm -rf /kisskb/build/mpe_axs101_defconfig_arcompact # Build took: 0:00:47.112625