Linux kernel stable tree (mirror) https://git.radix-linux.su/kernel/linux.git/atom?h=v6.12.80 2025-02-08T08:56:52+00:00 2025-02-08T08:56:52+00:00 Michael Ellerman mpe@ellerman.id.au 2024-12-18T11:43:47+00:00 urn:sha1:c5c5114bd7cb7bcf683097889658edc277cc9d90 [ Upstream commit 2bf66e66d2e6feece6175ec09ec590a0a8563bdd ] Commit c814bf958926 ("powerpc/selftests: Use timersub() for gettimeofday()"), got the order of arguments to timersub() wrong, leading to a negative time delta being reported, eg: test: gettimeofday tags: git_version:v6.12-rc5-409-gdddf291c3030 time = -3.297781 success: gettimeofday The correct order is minuend, subtrahend, which in this case is end, start. Which gives: test: gettimeofday tags: git_version:v6.12-rc5-409-gdddf291c3030-dirty time = 3.300650 success: gettimeofday Fixes: c814bf958926 ("powerpc/selftests: Use timersub() for gettimeofday()") Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com> Link: https://patch.msgid.link/20241218114347.428108-1-mpe@ellerman.id.au Signed-off-by: Sasha Levin <sashal@kernel.org> 2024-09-09T06:35:04+00:00 Madhavan Srinivasan maddy@linux.ibm.com 2024-08-12T09:41:52+00:00 urn:sha1:8c9c01ce695eea84d19482e7429e3d54ceb7585c Currently exec-target.c is linked statically with libc, which on Fedora at least requires installing an additional package (glibc-static). If that package is not installed the build fails with: CC exec_target /usr/bin/ld: cannot find -lc: No such file or directory collect2: error: ld returned 1 exit status All exec_target.c does is call sys_exit, which can be done easily enough using inline assembly, and removes the requirement for a static libc to be installed. Suggested-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20240812094152.418586-1-maddy@linux.ibm.com 2024-07-06T12:10:14+00:00 Michael Ellerman mpe@ellerman.id.au 2024-07-06T12:08:33+00:00 urn:sha1:8b7f59de92ac65aa21c7d779274dbfa577ae2d2c Currently building the powerpc selftests with USERCFLAGS set to anything causes the build to break: $ make -C tools/testing/selftests/powerpc V=1 USERCFLAGS=-Wno-error ... gcc -Wno-error cache_shape.c ... cache_shape.c:18:10: fatal error: utils.h: No such file or directory 18 | #include "utils.h" | ^~~~~~~~~ compilation terminated. This happens because the USERCFLAGS are added to CFLAGS in lib.mk, which causes the check of CFLAGS in powerpc/flags.mk to skip setting CFLAGS at all, resulting in none of the usual CFLAGS being passed. That can be seen in the output above, the only flag passed to the compiler is -Wno-error. Fix it by dropping the conditional setting of CFLAGS in flags.mk. Instead always set CFLAGS, but also append USERCFLAGS if they are set. Note that appending to CFLAGS (with +=) wouldn't work, because flags.mk is included by multiple Makefiles (to support partial builds), causing CFLAGS to be appended to multiple times. Additionally that would place the USERCFLAGS prior to the standard CFLAGS, meaning the USERCFLAGS couldn't override the standard flags. Being able to override the standard flags is desirable, for example for adding -Wno-error. With the fix in place, the CFLAGS are set correctly, including the USERCFLAGS: $ make -C tools/testing/selftests/powerpc V=1 USERCFLAGS=-Wno-error ... gcc -std=gnu99 -O2 -Wall -Werror -DGIT_VERSION='"v6.10-rc2-7-gdea17e7e56c3"' -I/home/michael/linux/tools/testing/selftests/powerpc/include -Wno-error cache_shape.c ... Fixes: 5553a79387e9 ("selftests/powerpc: Add flags.mk to support pmu buildable") Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20240706120833.909853-1-mpe@ellerman.id.au 2024-05-17T16:05:46+00:00 Linus Torvalds torvalds@linux-foundation.org 2024-05-17T16:05:46+00:00 urn:sha1:ff2632d7d08edc11e8bd0629e9fcfebab25c78b4 Pull powerpc updates from Michael Ellerman: - Enable BPF Kernel Functions (kfuncs) in the powerpc BPF JIT. - Allow per-process DEXCR (Dynamic Execution Control Register) settings via prctl, notably NPHIE which controls hashst/hashchk for ROP protection. - Install powerpc selftests in sub-directories. Note this changes the way run_kselftest.sh needs to be invoked for powerpc selftests. - Change fadump (Firmware Assisted Dump) to better handle memory add/remove. - Add support for passing additional parameters to the fadump kernel. - Add support for updating the kdump image on CPU/memory add/remove events. - Other small features, cleanups and fixes. Thanks to Andrew Donnellan, Andy Shevchenko, Aneesh Kumar K.V, Arnd Bergmann, Benjamin Gray, Bjorn Helgaas, Christian Zigotzky, Christophe Jaillet, Christophe Leroy, Colin Ian King, Cédric Le Goater, Dr. David Alan Gilbert, Erhard Furtner, Frank Li, GUO Zihua, Ganesh Goudar, Geoff Levand, Ghanshyam Agrawal, Greg Kurz, Hari Bathini, Joel Stanley, Justin Stitt, Kunwu Chan, Li Yang, Lidong Zhong, Madhavan Srinivasan, Mahesh Salgaonkar, Masahiro Yamada, Matthias Schiffer, Naresh Kamboju, Nathan Chancellor, Nathan Lynch, Naveen N Rao, Nicholas Miehlbradt, Ran Wang, Randy Dunlap, Ritesh Harjani, Sachin Sant, Shirisha Ganta, Shrikanth Hegde, Sourabh Jain, Stephen Rothwell, sundar, Thorsten Blum, Vaibhav Jain, Xiaowei Bao, Yang Li, and Zhao Chenhui. * tag 'powerpc-6.10-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (85 commits) powerpc/fadump: Fix section mismatch warning powerpc/85xx: fix compile error without CONFIG_CRASH_DUMP powerpc/fadump: update documentation about bootargs_append powerpc/fadump: pass additional parameters when fadump is active powerpc/fadump: setup additional parameters for dump capture kernel powerpc/pseries/fadump: add support for multiple boot memory regions selftests/powerpc/dexcr: Fix spelling mistake "predicition" -> "prediction" KVM: PPC: Book3S HV nestedv2: Fix an error handling path in gs_msg_ops_kvmhv_nestedv2_config_fill_info() KVM: PPC: Fix documentation for ppc mmu caps KVM: PPC: code cleanup for kvmppc_book3s_irqprio_deliver KVM: PPC: Book3S HV nestedv2: Cancel pending DEC exception powerpc/xmon: Check cpu id in commands "c#", "dp#" and "dx#" powerpc/code-patching: Use dedicated memory routines for patching powerpc/code-patching: Test patch_instructions() during boot powerpc64/kasan: Pass virtual addresses to kasan_init_phys_region() powerpc: rename SPRN_HID2 define to SPRN_HID2_750FX powerpc: Fix typos powerpc/eeh: Fix spelling of the word "auxillary" and update comment macintosh/ams: Fix unused variable warning powerpc/Makefile: Remove bits related to the previous use of -mcmodel=large ... 2024-05-08T12:32:22+00:00 Colin Ian King colin.i.king@gmail.com 2024-05-08T08:41:17+00:00 urn:sha1:98ec6d38ee57a734123c6f5d42640804034024ef There is a spelling mistake in the help message. Fix it. Signed-off-by: Colin Ian King <colin.i.king@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20240508084117.2869261-1-colin.i.king@gmail.com 2024-05-06T12:05:17+00:00 Benjamin Gray bgray@linux.ibm.com 2024-04-17T11:23:24+00:00 urn:sha1:f88723a609787254f7645eb6ac261b8363e8a5bc Adds a utility to exercise the prctl DEXCR inheritance in the shell. Supports setting and clearing each aspect. Signed-off-by: Benjamin Gray <bgray@linux.ibm.com> [mpe: Use correct SPDX license, use execvp() for usability, print errors] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20240417112325.728010-9-bgray@linux.ibm.com 2024-05-06T12:05:17+00:00 Benjamin Gray bgray@linux.ibm.com 2024-04-17T11:23:23+00:00 urn:sha1:9c4866b209ad31cae7c832d45c6137ce6a993ca0 Now that the DEXCR can be configured with prctl, add a section in lsdexcr that explains why each aspect is set the way it is. Signed-off-by: Benjamin Gray <bgray@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20240417112325.728010-8-bgray@linux.ibm.com 2024-05-06T12:05:17+00:00 Benjamin Gray bgray@linux.ibm.com 2024-04-17T11:23:22+00:00 urn:sha1:9930fba02a1c587849aea1e6c5688168013c065f Now that a process can control its DEXCR to some extent, make the hashchk tests more reliable by explicitly setting the local and onexec NPHIE aspect. Signed-off-by: Benjamin Gray <bgray@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20240417112325.728010-7-bgray@linux.ibm.com 2024-05-06T12:05:17+00:00 Benjamin Gray bgray@linux.ibm.com 2024-04-17T11:23:21+00:00 urn:sha1:5bfa66bf86d792bbcc76bc09cf99a2ae9d6e0eec Some basic tests of the prctl interface of the DEXCR. Signed-off-by: Benjamin Gray <bgray@linux.ibm.com> [mpe: Add missing SPDX tag] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20240417112325.728010-6-bgray@linux.ibm.com 2024-05-03T10:46:51+00:00 Benjamin Gray bgray@linux.ibm.com 2024-04-17T11:23:17+00:00 urn:sha1:d7228a58d9438d6f219dc7f33eab0d1980b3bd2f The hashchk tests want to verify that the hash key is changed over exec. It does so by calculating hashes at the same address across an exec. This is made simpler by disabling PIE functionality, so we can re-execute ourselves and be using the same addresses in the child. While -fno-pie is already added, -no-pie is also required. Fixes: bdb07f35a52f ("selftests/powerpc/dexcr: Add hashst/hashchk test") Signed-off-by: Benjamin Gray <bgray@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20240417112325.728010-2-bgray@linux.ibm.com