Changes in Makefile

478e1709 - powerpc/io: Remove PPC_IO_WORKAROUNDS

Wed, 18 Dec 2024 10:54:57 +0000

powerpc/io: Remove PPC_IO_WORKAROUNDSThe Cell blade support was the last user of PPC_IO_WORKAROUNDS, so theycan now be removed.Signed-off-by: Michael Ellerman Signed-off-by: Madhavan Srinivasan Link: https://patch.msgid.link/20241218105523.416573-9-mpe@ellerman.id.au List of files: /linux-6.15/arch/powerpc/kernel/Makefile

f026dffd - powerpc: Remove PPC_OF_PLATFORM_PCI

Wed, 18 Dec 2024 10:54:56 +0000

powerpc: Remove PPC_OF_PLATFORM_PCIThe Cell blade support was the last user of PPC_OF_PLATFORM_PCI, soremove it.Signed-off-by: Michael Ellerman Signed-off-by: Madhavan Srinivasan Link: https://patch.msgid.link/20241218105523.416573-8-mpe@ellerman.id.au List of files: /linux-6.15/arch/powerpc/kernel/Makefile

19f1bc3f - powerpc: Replace kretprobe code with rethook on powerpc

Fri, 30 Aug 2024 11:31:31 +0000

powerpc: Replace kretprobe code with rethook on powerpcThis is an adaptation of commit f3a112c0c40d ("x86,rethook,kprobes:Replace kretprobe with rethook on x86") to powerpc.Rethook follows the existing kretprobe implementation, but separatesit from kprobes so that it can be used by fprobe (ftrace-basedfunction entry/exit probes). As such, this patch also enables fprobeto work on powerpc. The only other change compared to the existingkretprobe implementation is doing the return address fixup inarch_rethook_fixup_return().Reference to other archs:commit b57c2f124098 ("riscv: add riscv rethook implementation")commit 7b0a096436c2 ("LoongArch: Replace kretprobe with rethook")Note:=====In future, rethook will be only for kretprobe, and kretprobewill be replaced by fprobe.https://lore.kernel.org/all/172000134410.63468.13742222887213469474.stgit@devnote2/We will adapt the above implementation for powerpc once its upstream.Until then, we can have this implementation of rethook to servecurrent kretprobe usecases.Reviewed-by: Naveen Rao Signed-off-by: Abhishek Dubey Signed-off-by: Michael Ellerman Link: https://msgid.link/20240830113131.7597-1-adubey@linux.ibm.com List of files: /linux-6.15/arch/powerpc/kernel/Makefile

732b32da - powerpc: Remove core support for 40x

Fri, 28 Jun 2024 12:11:58 +0000

powerpc: Remove core support for 40xNow that 40x platforms have gone, remove supportfor 40x in the core of powerpc arch.Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://msgid.link/20240628121201.130802-4-mpe@ellerman.id.au List of files: /linux-6.15/arch/powerpc/kernel/Makefile

c330b50d - powerpc/Makefile: Remove bits related to the previous use of -mcmodel=large

Wed, 10 Jan 2024 14:12:37 +0000

powerpc/Makefile: Remove bits related to the previous use of -mcmodel=largeAll supported compilers today (gcc v5.1+ and clang v11+) have support for-mcmodel=medium. As such, NO_MINIMAL_TOC is no longer being set. RemoveNO_MINIMAL_TOC as well as the fallback to -mminimal-toc.Reviewed-by: Christophe Leroy Signed-off-by: Naveen N Rao Signed-off-by: Michael Ellerman Link: https://msgid.link/20240110141237.3179199-1-naveen@kernel.org List of files: /linux-6.15/arch/powerpc/kernel/Makefile

4f1dad61 - powerpc: remove unused *_syscall_64.o variables in Makefile

Fri, 16 Feb 2024 13:55:17 +0000

powerpc: remove unused *_syscall_64.o variables in MakefileCommit ab1a517d55b0 ("powerpc/syscall: Rename syscall_64.c intointerrupt.c") missed to update these three lines: GCOV_PROFILE_syscall_64.o := n KCOV_INSTRUMENT_syscall_64.o := n UBSAN_SANITIZE_syscall_64.o := nTo restore the original behavior, we could replace them with: GCOV_PROFILE_interrupt.o := n KCOV_INSTRUMENT_interrupt.o := n UBSAN_SANITIZE_interrupt.o := nHowever, nobody has noticed the functional change in the past threeyears, so they were unneeded.Signed-off-by: Masahiro Yamada Signed-off-by: Michael Ellerman Link: https://msgid.link/20240216135517.2002749-1-masahiroy@kernel.org List of files: /linux-6.15/arch/powerpc/kernel/Makefile

bbd99922 - powerpc/dexcr: Reset DEXCR value across exec

Wed, 17 Apr 2024 11:23:19 +0000

powerpc/dexcr: Reset DEXCR value across execInheriting the DEXCR across exec can have security and usabilityconcerns. If a program is compiled with hash instructions it generallyexpects to run with NPHIE enabled. But if the parent process disablesNPHIE then if it's not careful it will be disabled for any children tooand the protection offered by hash checks is basically worthless.This patch introduces a per-process reset value that new execs in aparticular process tree are initialized with. This enables fine grainedcontrol over what DEXCR value child processes run with by default.For example, containers running legacy binaries that expect hashinstructions to act as NOPs could configure the reset value of thecontainer root to control the default reset value for all members ofthe container.Signed-off-by: Benjamin Gray [mpe: Add missing SPDX tag on dexcr.c]Signed-off-by: Michael Ellerman Link: https://msgid.link/20240417112325.728010-4-bgray@linux.ibm.com List of files: /linux-6.15/arch/powerpc/kernel/Makefile

97a5253d - powerpc: remove unused KCSAN_SANITIZE_early_64.o in Makefile

Fri, 16 Feb 2024 13:58:17 +0000

powerpc: remove unused KCSAN_SANITIZE_early_64.o in MakefileCommit 2fb857bc9f9e ("powerpc/kcsan: Add exclusions from instrumentation")added KCSAN_SANITIZE_early_64.o to arch/powerpc/kernel/Makefile, whileit does not compile early_64.o.Signed-off-by: Masahiro Yamada Signed-off-by: Michael Ellerman Link: https://msgid.link/20240216135817.2003106-1-masahiroy@kernel.org List of files: /linux-6.15/arch/powerpc/kernel/Makefile

27be2456 - powerpc/64: Rename entry_64.S to prom_entry_64.S

Tue, 06 Jun 2023 13:24:47 +0000

powerpc/64: Rename entry_64.S to prom_entry_64.SThis file contains only the enter_prom implementation now.Trim includes and update header comment while we're here.Signed-off-by: Nicholas Piggin Signed-off-by: Michael Ellerman Link: https://msgid.link/20230606132447.315714-7-npiggin@gmail.com List of files: /linux-6.15/arch/powerpc/kernel/Makefile

afc63868 - powerpc: merge 32-bit and 64-bit _switch implementation

Tue, 06 Jun 2023 13:24:46 +0000

powerpc: merge 32-bit and 64-bit _switch implementationThe _switch stack frame setup are substantially the same, so are thecomments. The difference in how the stack and current are switched,and other hardware and software housekeeping is done is moved intomacros.Generated code should be unchanged.Signed-off-by: Nicholas Piggin [mpe: Tweak include orer to fix compile errors on some configs]Signed-off-by: Michael Ellerman Link: https://msgid.link/20230606132447.315714-6-npiggin@gmail.com List of files: /linux-6.15/arch/powerpc/kernel/Makefile

2fb857bc - powerpc/kcsan: Add exclusions from instrumentation

Mon, 06 Feb 2023 02:17:57 +0000

powerpc/kcsan: Add exclusions from instrumentationExclude various incompatible compilation units from KCSANinstrumentation.Signed-off-by: Rohan McLure Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20230206021801.105268-2-rmclure@linux.ibm.com List of files: /linux-6.15/arch/powerpc/kernel/Makefile

e2375062 - powerpc/32: fix syscall wrappers with 64-bit arguments of unaligned register-pairs

Wed, 12 Oct 2022 03:53:34 +0000

powerpc/32: fix syscall wrappers with 64-bit arguments of unaligned register-pairspowerpc 32-bit system call (and function) calling convention for 64-bitarguments requires the next available odd-pair (two sequential registerswith the first being odd-numbered) from the standard register argumentallocation.The first argument register is r3, so a 64-bit argument that appears atan even position in the argument list must skip a register (unless therewere preceding 64-bit arguments, which might throw things off). Thisrequires non-standard compat definitions to deal with the holes in theargument register allocation.With pt_regs syscall wrappers which use a standard mapper to map pt_regsGPRs to function arguments, 32-bit kernels hit the same basic problem,the standard definitions don't cope with the unused argument registers.Fix this by having 32-bit kernels share those syscall definitions withcompat.Thanks to Jason for spending a lot of time finding and bisecting thisand developing a trivial reproducer. The perfect bug report.Reported-by: Jason A. Donenfeld Signed-off-by: Nicholas Piggin Fixes: 7e92e01b72452 ("powerpc: Provide syscall wrapper")Reviewed-by: Arnd Bergmann Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20221012035335.866440-1-npiggin@gmail.com List of files: /linux-6.15/arch/powerpc/kernel/Makefile

ae5b6779 - powerpc: Fix 85xx build

Tue, 11 Oct 2022 03:59:10 +0000

powerpc: Fix 85xx buildThe merge of the kbuild tree dropped the renaming of the FSL_BOOKEkconfig option.Fixes: 8afc66e8d43b ("Merge tag 'kbuild-v6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild")Signed-off-by: Joel Stanley Signed-off-by: Linus Torvalds List of files: /linux-6.15/arch/powerpc/kernel/Makefile

32164845 - kbuild: use obj-y instead extra-y for objects placed at the head

Sat, 24 Sep 2022 18:19:14 +0000

kbuild: use obj-y instead extra-y for objects placed at the headThe objects placed at the head of vmlinux need special treatments: - arch/$(SRCARCH)/Makefile adds them to head-y in order to place them before other archives in the linker command line. - arch/$(SRCARCH)/kernel/Makefile adds them to extra-y instead of obj-y to avoid them going into built-in.a.This commit gets rid of the latter.Create vmlinux.a to collect all the objects that are unconditionallylinked to vmlinux. The objects listed in head-y are moved to the headof vmlinux.a by using 'ar m'.With this, arch/$(SRCARCH)/kernel/Makefile can consistently use obj-yfor builtin objects.There is no *.o that is directly linked to vmlinux. Drop unneeded codein scripts/clang-tools/gen_compile_commands.py.$(AR) mPi needs 'T' to workaround the llvm-ar bug. The fix was suggestedby Nathan Chancellor [1].[1]: https://lore.kernel.org/llvm/YyjjT5gQ2hGMH0ni@dev-arch.thelio-3990X/Signed-off-by: Masahiro Yamada Tested-by: Nick Desaulniers Reviewed-by: Nicolas Schier List of files: /linux-6.15/arch/powerpc/kernel/Makefile

6556fd1a - powerpc: Cleanup idle for e500

Mon, 19 Sep 2022 17:01:42 +0000

powerpc: Cleanup idle for e500e500 idle setup is a bit messy.e500_idle() is used for PPC32 while book3e_idle() is used for PPC64.As they are mutually exclusive, call them all e500_idle().Use CONFIG_MPC_85xx instead of PPC32 + E500 in Makefile and renameidle_e500.c to idle_85xx.c .Rename idle_book3e.c to idle_64e.c and remove #ifdef PPC64 inas it's only built on PPC64.Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/8039301334e948974c85ec5ef2db37751075185b.1663606876.git.christophe.leroy@csgroup.eu List of files: /linux-6.15/arch/powerpc/kernel/Makefile

3e731858 - powerpc: Remove CONFIG_PPC_FSL_BOOK3E

Mon, 19 Sep 2022 17:01:38 +0000

powerpc: Remove CONFIG_PPC_FSL_BOOK3ECONFIG_PPC_FSL_BOOK3E is redundant with CONFIG_PPC_E500.Remove it.And rename five files accordingly.Signed-off-by: Christophe Leroy [mpe: Rename include guards to match new file names]Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/795cb93b88c9a0279289712e674f39e3b108a1b4.1663606876.git.christophe.leroy@csgroup.eu List of files: /linux-6.15/arch/powerpc/kernel/Makefile

688de017 - powerpc: Change CONFIG_E500 to CONFIG_PPC_E500

Mon, 19 Sep 2022 17:01:35 +0000

powerpc: Change CONFIG_E500 to CONFIG_PPC_E500It will be used outside arch/powerpc, make it clear its apowerpc configuration item.And we already have CONFIG_PPC_E500MC, so that will makeit more consistent.Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/e63b22083c11c4300f4a82d3123a46e5fdd54fa6.1663606876.git.christophe.leroy@csgroup.eu List of files: /linux-6.15/arch/powerpc/kernel/Makefile

dfc3095c - powerpc: Remove CONFIG_FSL_BOOKE

Mon, 19 Sep 2022 17:01:31 +0000

powerpc: Remove CONFIG_FSL_BOOKEPPC_85xx is PPC32 only.PPC_85xx always selects E500 and is the only PPC32 thatselects E500.FSL_BOOKE is selected when E500 and PPC32 are selected.So FSL_BOOKE is redundant with PPC_85xx.Remove FSL_BOOKE.And rename four files accordingly.cpu_setup_fsl_booke.S is not renamed because it is linked toPPC_FSL_BOOK3E and not to FSL_BOOKE as suggested by its name.Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/08e3e15594e66d63b9e89c5b4f9c35153913c28f.1663606875.git.christophe.leroy@csgroup.eu List of files: /linux-6.15/arch/powerpc/kernel/Makefile

f4a0318f - powerpc: add support for syscall stack randomization

Fri, 01 Jul 2022 08:24:35 +0000

powerpc: add support for syscall stack randomizationAdd support for adding a random offset to the stack while handlingsyscalls. This patch uses mftb() instead of get_random_int() for betterperformance.In order to avoid unconditional stack canaries on syscall entry (due tothe use of alloca()), also disable stack protector to avoid triggeringneedless checks and slowing down the entry path. As there is no generalway to control stack protector coverage with a function attribute, thismust be disabled at the compilation unit level.Signed-off-by: Xiu Jianfeng Reviewed-by: Kees Cook Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220701082435.126596-3-xiujianfeng@huawei.com List of files: /linux-6.15/arch/powerpc/kernel/Makefile

1547db7d - powerpc: Move system_call_exception() to syscall.c

Fri, 01 Jul 2022 08:24:34 +0000

powerpc: Move system_call_exception() to syscall.cThis is a lead-up patch to enable syscall stack randomization, whichuses alloca() and makes the compiler add unconditional stack canarieson syscall entry. In order to avoid triggering needless checks andslowing down the entry path, the feature needs to disable stackprotector at the compilation unit level as there is no general way tocontrol stack protector coverage with a function attribute.So move system_call_exception() to syscall.c to avoid affecting otherfunctions in interrupt.c.Suggested-by: Michael Ellerman Signed-off-by: Xiu Jianfeng Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220701082435.126596-2-xiujianfeng@huawei.com List of files: /linux-6.15/arch/powerpc/kernel/Makefile