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2022-03-01powerpc/fadump: register for fadump as early as possibleHari Bathini
Crash recovery (fadump) is setup in the userspace by some service. This service rebuilds initrd with dump capture capability, if it is not already dump capture capable before proceeding to register for firmware assisted dump (echo 1 > /sys/kernel/fadump/registered). But arming the kernel with crash recovery support does not have to wait for userspace configuration. So, register for fadump while setting it up itself. This can at worst lead to a scenario, where /proc/vmcore is ready afer crash but the initrd does not know how/where to offload it, which is always better than not having a /proc/vmcore at all due to incomplete configuration in the userspace at the time of crash. Commit 0823c68b054b ("powerpc/fadump: re-register firmware-assisted dump if already registered") ensures this change does not break userspace. Signed-off-by: Hari Bathini <hbathini@linux.ibm.com> [mpe: Reword comment] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20220201105305.155511-1-hbathini@linux.ibm.com
2022-02-24powerpc/module_64: fix array_size.cocci warningGuo Zhengkui
Fix following coccicheck warning: ./arch/powerpc/kernel/module_64.c:432:40-41: WARNING: Use ARRAY_SIZE. ARRAY_SIZE(arr) is a macro provided by the kernel. It makes sure that arr is an array, so it's safer than sizeof(arr) / sizeof(arr[0]) and more standard. Signed-off-by: Guo Zhengkui <guozhengkui@vivo.com> Reviewed-by: Russell Currey <ruscur@russell.cc> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20220223075426.20939-1-guozhengkui@vivo.com
2022-02-16asm-generic: Define 'func_desc_t' to commonly describe function descriptorsChristophe Leroy
We have three architectures using function descriptors, each with its own type and name. Add a common typedef that can be used in generic code. Also add a stub typedef for architecture without function descriptors, to avoid a forest of #ifdefs. It replaces the similar 'func_desc_t' previously defined in arch/powerpc/kernel/module_64.c Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Reviewed-by: Kees Cook <keescook@chromium.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Helge Deller <deller@gmx.de> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/f1f91b142b3c1082bdc1586ce71c9bac1e75213c.1644928018.git.christophe.leroy@csgroup.eu
2022-02-16asm-generic: Define CONFIG_HAVE_FUNCTION_DESCRIPTORSChristophe Leroy
Replace HAVE_DEREFERENCE_FUNCTION_DESCRIPTOR by a config option named CONFIG_HAVE_FUNCTION_DESCRIPTORS and use it instead of 'dereference_function_descriptor' macro to know whether an arch has function descriptors. To limit churn in one of the following patches, use an #ifdef/#else construct with empty first part instead of an #ifndef in asm-generic/sections.h On powerpc, make sure the config option matches the ABI used by the compiler with a BUILD_BUG_ON() and add missing _CALL_ELF=2 when calling 'sparse' so that sparse sees the same piece of code as GCC. And include a helper to check whether an arch has function descriptors or not : have_function_descriptors() Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Reviewed-by: Kees Cook <keescook@chromium.org> Reviewed-by: Nicholas Piggin <npiggin@gmail.com> Acked-by: Helge Deller <deller@gmx.de> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/4a0f11fb0ea74a3197bc44dd7ba25e53a24fd03d.1644928018.git.christophe.leroy@csgroup.eu
2022-02-16powerpc: Prepare func_desc_t for refactorisationChristophe Leroy
In preparation of making func_desc_t generic, change the ELFv2 version to a struct containing 'addr' element. This allows using single helpers common to ELFv1 and ELFv2 and reduces the amount of #ifdef's Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Reviewed-by: Kees Cook <keescook@chromium.org> Acked-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/5c36105e08b27b98450535bff48d71b690c19739.1644928018.git.christophe.leroy@csgroup.eu
2022-02-16powerpc: Use 'struct func_desc' instead of 'struct ppc64_opd_entry'Christophe Leroy
'struct ppc64_opd_entry' is somehow redundant with 'struct func_desc', the later is more correct/complete as it includes the third field which is unused. So use 'struct func_desc' instead of 'struct ppc64_opd_entry' Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Reviewed-by: Kees Cook <keescook@chromium.org> Reviewed-by: Daniel Axtens <dja@axtens.net> Reviewed-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/34e76bac6cbe95a63ecd37df69fb7feb93b0ea7c.1644928018.git.christophe.leroy@csgroup.eu
2022-02-16powerpc: Move and rename func_descr_tChristophe Leroy
There are three architectures with function descriptors, try to have common names for the address they contain in order to refactor some functions into generic functions later. powerpc has 'entry' ia64 has 'ip' parisc has 'addr' Vote for 'addr' and update 'func_descr_t' accordingly. Move it in asm/elf.h to have it at the same place on all three architectures, remove the typedef which hides its real type, and change it to a smoother name 'struct func_desc'. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Reviewed-by: Nicholas Piggin <npiggin@gmail.com> Reviewed-by: Kees Cook <keescook@chromium.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/529b2ba1d001e8f628ef0d30e8044c9b3d0a4921.1644928018.git.christophe.leroy@csgroup.eu
2022-02-16powerpc/ftrace: Style cleanup in ftrace_mprofile.SChristophe Leroy
Add some line breaks to better match the file's style, add some space after comma and fix a couple of misplaced blanks. Suggested-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Reviewed-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/973506292d0c7b05c06530c8e11803ce38e5eda2.1644949750.git.christophe.leroy@csgroup.eu
2022-02-16powerpc/ftrace: Have arch_ftrace_get_regs() return NULL unless FL_SAVE_REGS ↵Christophe Leroy
is set When FL_SAVE_REGS is not set we get here via ftrace_caller() which doesn't save all registers. ftrace_caller() explicitely clears regs.msr, so we can rely on it to know where we come from. We don't expect MSR register to be 0 at all when involving ftrace. Fixes: 40b035efe288 ("powerpc/ftrace: Implement CONFIG_DYNAMIC_FTRACE_WITH_ARGS") Reported-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/2f9a7e898c93cc7438ef5ccd47cb9c3a9c5b53ef.1644949750.git.christophe.leroy@csgroup.eu
2022-02-16powerpc/ftrace: Add recursion protection in prepare_ftrace_return()Christophe Leroy
The function_graph_enter() does not provide any recursion protection. Add a protection in prepare_ftrace_return() in case function_graph_enter() calls something that gets function graph traced. Fixes: 830213786c49 ("powerpc/ftrace: directly call of function graph tracer by ftrace caller") Reported-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/74edf2ff0a60e66b0d9225a137100a86a0557032.1644949750.git.christophe.leroy@csgroup.eu
2022-02-16powerpc/ftrace: Also save r1 in ftrace_caller()Christophe Leroy
Also save r1 in ftrace_caller() r1 is needed during unwinding when the function_graph tracer is active. Fixes: 830213786c49 ("powerpc/ftrace: directly call of function graph tracer by ftrace caller") Reported-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/ff535e86d3a69376a6d89168511d4e403835f18b.1644949750.git.christophe.leroy@csgroup.eu
2022-02-12powerpc/vdso: Move cvdso_call macro into gettimeofday.SChristophe Leroy
Now that gettimeofday.S is unique, move cvdso_call macro into that file which is the only user. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/72720359d4c58e3a3b96dd74952741225faac3de.1642782130.git.christophe.leroy@csgroup.eu
2022-02-12powerpc/vdso: Remove cvdso_call_time macroChristophe Leroy
cvdso_call_time macro is very similar to cvdso_call macro. Add a call_time argument to cvdso_call which is 0 by default and set to 1 when using cvdso_call to call __c_kernel_time(). Return returned value as is with CR[SO] cleared when it is used for time(). Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/837a260ad86fc1ce297a562c2117fd69be5f7b5c.1642782130.git.christophe.leroy@csgroup.eu
2022-02-12powerpc/vdso: Merge vdso64 and vdso32 into a single directoryChristophe Leroy
merge vdso64 into vdso32 and rename it vdso. Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/4dbe05cc130f6a0858d09ac72e436c373cb08b70.1642782130.git.christophe.leroy@csgroup.eu
2022-02-12powerpc/vdso: Rework VDSO32 makefile to add a prefix to object filesChristophe Leroy
In order to merge vdso32 and vdso64 build in following patch, rework Makefile is order to add -32 suffix to VDSO32 object files. Also change sigtramp.S to sigtramp32.S as VDSO64 sigtramp.S is too different to be squashed into VDSO32 sigtramp.S at the first place. gen_vdso_offsets.sh also becomes gen_vdso32_offsets.sh Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/0c421b704a57b228e75a891512568339c53667ad.1642782130.git.christophe.leroy@csgroup.eu
2022-02-12powerpc/vdso: augment VDSO32 functions to support 64 bits buildChristophe Leroy
VDSO64 cacheflush.S datapage.S gettimeofday.S and vgettimeofday.c are very similar to their VDSO32 counterpart. VDSO32 counterpart is already more complete than the VDSO64 version as it supports both PPC32 vdso and 32 bits VDSO for PPC64. Use compat macros wherever necessary in PPC32 files so that they can also be used to build VDSO64. vdso64/note.S is already a link to vdso32/note.S so no change is required. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/c2cbb8f046b7efc251053521dc39b752795e26b7.1642782130.git.christophe.leroy@csgroup.eu
2022-02-12powerpc: Use the newly added is_tsk_32bit_task() macroChristophe Leroy
Two places deserve using the macro is_tsk_32bit_task() added by commit 252745240ba0 ("powerpc/audit: Fix syscall_get_arch()") Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/7304a889dbe885aefad8a8333673c81ee4b8f7a6.1642751874.git.christophe.leroy@csgroup.eu
2022-02-12powerpc/ftrace: Remove ftrace_32.SChristophe Leroy
Functions in ftrace_32.S are common with PPC64. Reuse the ones defined for PPC64 with slight modification when required. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> [mpe: Squash in fixup diff from Christophe] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/5e837fc190504c4ef834272e70d60ae33f175d49.1640017960.git.christophe.leroy@csgroup.eu
2022-02-07powerpc/ftrace: Prepare ftrace_64_mprofile.S for reuse by PPC32Christophe Leroy
PPC64 mprofile versions and PPC32 are very similar. Modify PPC64 version so that if can be reused for PPC32. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/82a732915dc71ee766e31809350939331944006d.1640017960.git.christophe.leroy@csgroup.eu
2022-02-07powerpc/ftrace: directly call of function graph tracer by ftrace callerChristophe Leroy
Modify function graph tracer to be handled directly by the standard ftrace caller. This is made possible as powerpc now supports CONFIG_DYNAMIC_FTRACE_WITH_ARGS. This change simplifies the call of function graph ftrace. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/04d196585ff81bde06a000bd9c633a33a5b21130.1640017960.git.christophe.leroy@csgroup.eu
2022-02-07powerpc/ftrace: Refactor ftrace_{en/dis}able_ftrace_graph_callerChristophe Leroy
ftrace_enable_ftrace_graph_caller() and ftrace_disable_ftrace_graph_caller() have common code. They will have even more common code after following patch. Refactor into a single ftrace_modify_ftrace_graph_caller() function. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/f37785a531f1a8f201e1b3da45997a5c77e9d820.1640017960.git.christophe.leroy@csgroup.eu
2022-02-07powerpc/ftrace: Prepare PPC64's ftrace_caller() for ↵Christophe Leroy
CONFIG_DYNAMIC_FTRACE_WITH_ARGS In order to implement CONFIG_DYNAMIC_FTRACE_WITH_ARGS, change ftrace_caller() to handle LIVEPATCH the same way as frace_caller_regs(). Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/850817333cc76593699032e8e9a70d8c36e1af1e.1640017960.git.christophe.leroy@csgroup.eu
2022-02-07powerpc/ftrace: Prepare PPC32's ftrace_caller() for ↵Christophe Leroy
CONFIG_DYNAMIC_FTRACE_WITH_ARGS In order to implement CONFIG_DYNAMIC_FTRACE_WITH_ARGS, change ftrace_caller() stack layout to match struct pt_regs. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/da9734eba504998fb914aca12131c9f6bf6120a8.1640017960.git.christophe.leroy@csgroup.eu
2022-02-07powerpc/ftrace: Simplify PPC32's return_to_handler()Christophe Leroy
return_to_handler() was copied from PPC64. For PPC32 it just needs to save r3 and r4, and doesn't require any nop after the bl. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/aab39b77b34fb2c4ed08ed01c547b6ed13643788.1640017960.git.christophe.leroy@csgroup.eu
2022-02-07powerpc/ftrace: Don't save again LR in ftrace_regs_caller() on PPC32Christophe Leroy
PPC32 mcount() caller already saves LR on stack, no need to save it again. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/eadcfc770b4f1e35535ffb85e28e858a2c31dec4.1640017960.git.christophe.leroy@csgroup.eu
2022-02-07powerpc/ftrace: Add support for livepatch to PPC32Christophe Leroy
PPC64 needs some special logic to properly set up the TOC. See commit 85baa095497f ("powerpc/livepatch: Add live patching support on ppc64le") for details. PPC32 doesn't have TOC so it doesn't need that logic, so adding LIVEPATCH support is straight forward. Add CONFIG_LIVEPATCH_64 and move livepatch stack logic into that item. Livepatch sample modules all work. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/63cb094125b6a6038c65eeac2abaabbabe63addd.1640017960.git.christophe.leroy@csgroup.eu
2022-02-07powerpc/module_32: Fix livepatching for RO modulesChristophe Leroy
Livepatching a loaded module involves applying relocations through apply_relocate_add(), which attempts to write to read-only memory when CONFIG_STRICT_MODULE_RWX=y. R_PPC_ADDR16_LO, R_PPC_ADDR16_HI, R_PPC_ADDR16_HA and R_PPC_REL24 are the types generated by the kpatch-build userspace tool or klp-convert kernel tree observed applying a relocation to a post-init module. Use patch_instruction() to patch those relocations. Commit 8734b41b3efe ("powerpc/module_64: Fix livepatching for RO modules") did similar change in module_64. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Acked-by: Joe Lawrence <joe.lawrence@redhat.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/d5697157cb7dba3927e19aa17c915a83bc550bb2.1640017960.git.christophe.leroy@csgroup.eu
2022-02-07powerpc/32: Remove _ENTRY() macroChristophe Leroy
_ENTRY() is now redundant with _GLOBAL(). Remove it. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/62a35f8dde2bb74c8d0d7a5430cce07a5a3a6fb6.1638273868.git.christophe.leroy@csgroup.eu
2022-02-07powerpc/32: Remove remaining .stabs annotationsChristophe Leroy
STABS debug format has been superseded long time ago by DWARF. Remove the few remaining .stabs annotations from old 32 bits code. Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/68932ec2ba6b868d35006b96e90f0890f3da3c05.1638273868.git.christophe.leroy@csgroup.eu
2022-02-07powerpc/603: Fix boot failure with DEBUG_PAGEALLOC and KFENCEChristophe Leroy
Allthough kernel text is always mapped with BATs, we still have inittext mapped with pages, so TLB miss handling is required when CONFIG_DEBUG_PAGEALLOC or CONFIG_KFENCE is set. The final solution should be to set a BAT that also maps inittext but that BAT then needs to be cleared at end of init, and it will require more changes to be able to do it properly. As DEBUG_PAGEALLOC or KFENCE are debugging, performance is not a big deal so let's fix it simply for now to enable easy stable application. Fixes: 035b19a15a98 ("powerpc/32s: Always map kernel text and rodata with BATs") Cc: stable@vger.kernel.org # v5.11+ Reported-by: Maxime Bizon <mbizon@freebox.fr> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/aea33b4813a26bdb9378b5f273f00bd5d4abe240.1638857364.git.christophe.leroy@csgroup.eu
2022-02-07powerpc: Set crashkernel offset to mid of RMA regionSourabh Jain
On large config LPARs (having 192 and more cores), Linux fails to boot due to insufficient memory in the first memblock. It is due to the memory reservation for the crash kernel which starts at 128MB offset of the first memblock. This memory reservation for the crash kernel doesn't leave enough space in the first memblock to accommodate other essential system resources. The crash kernel start address was set to 128MB offset by default to ensure that the crash kernel get some memory below the RMA region which is used to be of size 256MB. But given that the RMA region size can be 512MB or more, setting the crash kernel offset to mid of RMA size will leave enough space for the kernel to allocate memory for other system resources. Since the above crash kernel offset change is only applicable to the LPAR platform, the LPAR feature detection is pushed before the crash kernel reservation. The rest of LPAR specific initialization will still be done during pseries_probe_fw_features as usual. This patch is dependent on changes to paca allocation for boot CPU. It expect boot CPU to discover 1T segment support which is introduced by the patch posted here: https://lists.ozlabs.org/pipermail/linuxppc-dev/2022-January/239175.html Reported-by: Abdul haleem <abdhalee@linux.vnet.ibm.com> Signed-off-by: Sourabh Jain <sourabhjain@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20220204085601.107257-1-sourabhjain@linux.ibm.com
2022-02-03powerpc/603: Clear C bit when PTE is read onlyChristophe Leroy
On book3s/32 MMU, PP bits don't offer kernel RO protection, kernel pages are always RW. However, on the 603 a page fault is always generated when the C bit (change bit = dirty bit) is not set. Enforce kernel RO protection by clearing C bit in TLB miss handler when the page doesn't have _PAGE_RW flag. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/bbb13848ff0100a76ee9ea95118058c30ae95f2c.1643613343.git.christophe.leroy@csgroup.eu
2022-02-03powerpc/603: Remove outdated commentChristophe Leroy
Since commit 84de6ab0e904 ("powerpc/603: don't handle PAGE_ACCESSED in TLB miss handlers.") page table is not updated anymore by TLB miss handlers. Remove the comment. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/38b1ffefd2146fa56bf8aa605d476ad9736bbb37.1643613296.git.christophe.leroy@csgroup.eu
2022-02-03powerpc/module_64: use module_init_section instead of patching namesWedson Almeida Filho
Without this patch, module init sections are disabled by patching their names in arch-specific code when they're loaded (which prevents code in layout_sections from finding init sections). This patch uses the new arch-specific module_init_section instead. This allows modules that have .init_array sections to have the initialisers properly called (on load, before init). Without this patch, the initialisers are not called because .init_array is renamed to _init_array, and thus isn't found by code in find_module_sections(). Signed-off-by: Wedson Almeida Filho <wedsonaf@google.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20220202055123.2144842-1-wedsonaf@google.com
2022-02-03powerpc: Fix debug print in smp_setup_cpu_mapsFabiano Rosas
When figuring out the number of threads, the debug message prints "1 thread" for the first iteration of the loop, instead of the actual number of threads calculated from the length of the "ibm,ppc-interrupt-server#s" property. * /cpus/PowerPC,POWER8@20... ibm,ppc-interrupt-server#s -> 1 threads <--- WRONG thread 0 -> cpu 0 (hard id 32) thread 1 -> cpu 1 (hard id 33) thread 2 -> cpu 2 (hard id 34) thread 3 -> cpu 3 (hard id 35) thread 4 -> cpu 4 (hard id 36) thread 5 -> cpu 5 (hard id 37) thread 6 -> cpu 6 (hard id 38) thread 7 -> cpu 7 (hard id 39) * /cpus/PowerPC,POWER8@28... ibm,ppc-interrupt-server#s -> 8 threads thread 0 -> cpu 8 (hard id 40) thread 1 -> cpu 9 (hard id 41) thread 2 -> cpu 10 (hard id 42) thread 3 -> cpu 11 (hard id 43) thread 4 -> cpu 12 (hard id 44) thread 5 -> cpu 13 (hard id 45) thread 6 -> cpu 14 (hard id 46) thread 7 -> cpu 15 (hard id 47) (...) Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20210120181847.952106-1-farosas@linux.ibm.com
2022-02-02powerpc/64: Move paca allocation later in bootMichael Ellerman
Mahesh & Sourabh identified two problems[1][2] with ppc64_bolted_size() and paca allocation. The first is that on a Radix capable machine but with "disable_radix" on the command line, there is a window during early boot where early_radix_enabled() is true, even though it will later become false. early_init_devtree: <- early_radix_enabled() = false early_init_dt_scan_cpus: <- early_radix_enabled() = false ... check_cpu_pa_features: <- early_radix_enabled() = false ... ^ <- early_radix_enabled() = TRUE allocate_paca: | <- early_radix_enabled() = TRUE ... | ppc64_bolted_size: | <- early_radix_enabled() = TRUE if (early_radix_enabled())| <- early_radix_enabled() = TRUE return ULONG_MAX; | ... | ... | <- early_radix_enabled() = TRUE ... | <- early_radix_enabled() = TRUE mmu_early_init_devtree() V ... <- early_radix_enabled() = false This causes ppc64_bolted_size() to return ULONG_MAX for the boot CPU's paca allocation, even though later it will return a different value. This is not currently a bug because the paca allocation is also limited by the RMA size, but that is very fragile. The second issue is that when using the Hash MMU, when we call ppc64_bolted_size() for the boot CPU's paca allocation, we have not yet detected whether 1T segments are available. That causes ppc64_bolted_size() to return 256MB, even if the machine can actually support up to 1T. This is usually OK, we generally have space below 256MB for one paca, but for a kdump kernel placed above 256MB it causes the boot to fail. At boot we cannot discover all the features of the machine instantaneously, so there will always be some periods where we have incomplete knowledge of the system. However both the above problems stem from the fact that we allocate the boot CPU's paca (and paca pointers array) before we decide which MMU we are using, or discover its exact features. Moving the paca allocation slightly later still can solve both the issues described above, and means for a normal boot we don't do any permanent allocations until after we've discovered the MMU. Note that although we move the boot CPU's paca allocation later, we still have a temporary paca (boot_paca) accessible via r13, so code that does read only access to paca fields is safe. The only risk is that some code writes to the boot_paca, and that write will then be lost when we switch away from the boot_paca later in early_setup(). The additional code that runs before the paca allocation is primarily mmu_early_init_devtree(), which is scanning the device tree and populating globals and cur_cpu_spec with MMU related flags. I do not see any additional code that writes to paca fields. [1]: https://lore.kernel.org/r/20211018084434.217772-2-sourabhjain@linux.ibm.com [2]: https://lore.kernel.org/r/20211018084434.217772-3-sourabhjain@linux.ibm.com Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20220124130544.408675-1-mpe@ellerman.id.au
2022-01-31powerpc: add link stack flush mitigation status in debugfs.Michal Suchanek
The link stack flush status is not visible in debugfs. It can be enabled even when count cache flush is disabled. Add separate file for its status. Signed-off-by: Michal Suchanek <msuchanek@suse.de> [mpe: Update for change to link_stack_flush_type] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20191127220959.6208-1-msuchanek@suse.de
2022-01-25powerpc/64s/interrupt: Fix decrementer stormNicholas Piggin
The decrementer exception can fail to be cleared when the interrupt returns in the case where the decrementer wraps with the next timer still beyond decrementer_max. This results in a decrementer interrupt storm. This is triggerable with small decrementer system with hard and soft watchdogs disabled. Fix this by always programming the decrementer if there was no timer. Fixes: 0faf20a1ad16 ("powerpc/64s/interrupt: Don't enable MSR[EE] in irq handlers unless perf is in use") Reported-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20220124143930.3923442-1-npiggin@gmail.com
2022-01-23Merge tag 'powerpc-5.17-2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc fixes from Michael Ellerman: - A series of bpf fixes, including an oops fix and some codegen fixes. - Fix a regression in syscall_get_arch() for compat processes. - Fix boot failure on some 32-bit systems with KASAN enabled. - A couple of other build/minor fixes. Thanks to Athira Rajeev, Christophe Leroy, Dmitry V. Levin, Jiri Olsa, Johan Almbladh, Maxime Bizon, Naveen N. Rao, and Nicholas Piggin. * tag 'powerpc-5.17-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: powerpc/64s: Mask SRR0 before checking against the masked NIP powerpc/perf: Only define power_pmu_wants_prompt_pmi() for CONFIG_PPC64 powerpc/32s: Fix kasan_init_region() for KASAN powerpc/time: Fix build failure due to do_hard_irq_enable() on PPC32 powerpc/audit: Fix syscall_get_arch() powerpc64/bpf: Limit 'ldbrx' to processors compliant with ISA v2.06 tools/bpf: Rename 'struct event' to avoid naming conflict powerpc/bpf: Update ldimm64 instructions during extra pass powerpc32/bpf: Fix codegen for bpf-to-bpf calls bpf: Guard against accessing NULL pt_regs in bpf_get_task_stack()
2022-01-22proc: remove PDE_DATA() completelyMuchun Song
Remove PDE_DATA() completely and replace it with pde_data(). [akpm@linux-foundation.org: fix naming clash in drivers/nubus/proc.c] [akpm@linux-foundation.org: now fix it properly] Link: https://lkml.kernel.org/r/20211124081956.87711-2-songmuchun@bytedance.com Signed-off-by: Muchun Song <songmuchun@bytedance.com> Acked-by: Christian Brauner <christian.brauner@ubuntu.com> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Alexey Gladkov <gladkov.alexey@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-01-20Merge branch 'akpm' (patches from Andrew)Linus Torvalds
Merge more updates from Andrew Morton: "55 patches. Subsystems affected by this patch series: percpu, procfs, sysctl, misc, core-kernel, get_maintainer, lib, checkpatch, binfmt, nilfs2, hfs, fat, adfs, panic, delayacct, kconfig, kcov, and ubsan" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (55 commits) lib: remove redundant assignment to variable ret ubsan: remove CONFIG_UBSAN_OBJECT_SIZE kcov: fix generic Kconfig dependencies if ARCH_WANTS_NO_INSTR lib/Kconfig.debug: make TEST_KMOD depend on PAGE_SIZE_LESS_THAN_256KB btrfs: use generic Kconfig option for 256kB page size limit arch/Kconfig: split PAGE_SIZE_LESS_THAN_256KB from PAGE_SIZE_LESS_THAN_64KB configs: introduce debug.config for CI-like setup delayacct: track delays from memory compact Documentation/accounting/delay-accounting.rst: add thrashing page cache and direct compact delayacct: cleanup flags in struct task_delay_info and functions use it delayacct: fix incomplete disable operation when switch enable to disable delayacct: support swapin delay accounting for swapping without blkio panic: remove oops_id panic: use error_report_end tracepoint on warnings fs/adfs: remove unneeded variable make code cleaner FAT: use io_schedule_timeout() instead of congestion_wait() hfsplus: use struct_group_attr() for memcpy() region nilfs2: remove redundant pointer sbufs fs/binfmt_elf: use PT_LOAD p_align values for static PIE const_structs.checkpatch: add frequently used ops structs ...
2022-01-20mm: percpu: add generic pcpu_populate_pte() functionKefeng Wang
With NEED_PER_CPU_PAGE_FIRST_CHUNK enabled, we need a function to populate pte, this patch adds a generic pcpu populate pte function, pcpu_populate_pte(), which is marked __weak and used on most architectures, but it is overridden on x86, which has its own implementation. Link: https://lkml.kernel.org/r/20211216112359.103822-5-wangkefeng.wang@huawei.com Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: "Rafael J. Wysocki" <rafael@kernel.org> Cc: Dennis Zhou <dennis@kernel.org> Cc: Tejun Heo <tj@kernel.org> Cc: Christoph Lameter <cl@linux.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-01-20mm: percpu: add generic pcpu_fc_alloc/free funcitonKefeng Wang
With the previous patch, we could add a generic pcpu first chunk allocate and free function to cleanup the duplicated definations on each architecture. Link: https://lkml.kernel.org/r/20211216112359.103822-4-wangkefeng.wang@huawei.com Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Dennis Zhou <dennis@kernel.org> Cc: Tejun Heo <tj@kernel.org> Cc: Christoph Lameter <cl@linux.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: "Rafael J. Wysocki" <rafael@kernel.org> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-01-20mm: percpu: add pcpu_fc_cpu_to_node_fn_t typedefKefeng Wang
Add pcpu_fc_cpu_to_node_fn_t and pass it into pcpu_fc_alloc_fn_t, pcpu first chunk allocation will call it to alloc memblock on the corresponding node by it, this is prepare for the next patch. Link: https://lkml.kernel.org/r/20211216112359.103822-3-wangkefeng.wang@huawei.com Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: "Rafael J. Wysocki" <rafael@kernel.org> Cc: Dennis Zhou <dennis@kernel.org> Cc: Tejun Heo <tj@kernel.org> Cc: Christoph Lameter <cl@linux.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-01-18powerpc/64s: Mask SRR0 before checking against the masked NIPNicholas Piggin
Commit 314f6c23dd8d ("powerpc/64s: Mask NIP before checking against SRR0") masked off the low 2 bits of the NIP value in the interrupt stack frame in case they are non-zero and mis-compare against a SRR0 register value of a CPU which always reads back 0 from the 2 low bits which are reserved. This now causes the opposite problem that an implementation which does implement those bits in SRR0 will mis-compare against the masked NIP value in which they have been cleared. QEMU is one such implementation, and this is allowed by the architecture. This can be triggered by sigfuz by setting low bits of PT_NIP in the signal context. Fix this for now by masking the SRR0 bits as well. Cleaner is probably to sanitise these values before putting them in registers or stack, but this is the quick and backportable fix. Fixes: 314f6c23dd8d ("powerpc/64s: Mask NIP before checking against SRR0") Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20220117134403.2995059-1-npiggin@gmail.com
2022-01-17Merge branch 'signal-for-v5.17' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace Pull signal/exit/ptrace updates from Eric Biederman: "This set of changes deletes some dead code, makes a lot of cleanups which hopefully make the code easier to follow, and fixes bugs found along the way. The end-game which I have not yet reached yet is for fatal signals that generate coredumps to be short-circuit deliverable from complete_signal, for force_siginfo_to_task not to require changing userspace configured signal delivery state, and for the ptrace stops to always happen in locations where we can guarantee on all architectures that the all of the registers are saved and available on the stack. Removal of profile_task_ext, profile_munmap, and profile_handoff_task are the big successes for dead code removal this round. A bunch of small bug fixes are included, as most of the issues reported were small enough that they would not affect bisection so I simply added the fixes and did not fold the fixes into the changes they were fixing. There was a bug that broke coredumps piped to systemd-coredump. I dropped the change that caused that bug and replaced it entirely with something much more restrained. Unfortunately that required some rebasing. Some successes after this set of changes: There are few enough calls to do_exit to audit in a reasonable amount of time. The lifetime of struct kthread now matches the lifetime of struct task, and the pointer to struct kthread is no longer stored in set_child_tid. The flag SIGNAL_GROUP_COREDUMP is removed. The field group_exit_task is removed. Issues where task->exit_code was examined with signal->group_exit_code should been examined were fixed. There are several loosely related changes included because I am cleaning up and if I don't include them they will probably get lost. The original postings of these changes can be found at: https://lkml.kernel.org/r/87a6ha4zsd.fsf@email.froward.int.ebiederm.org https://lkml.kernel.org/r/87bl1kunjj.fsf@email.froward.int.ebiederm.org https://lkml.kernel.org/r/87r19opkx1.fsf_-_@email.froward.int.ebiederm.org I trimmed back the last set of changes to only the obviously correct once. Simply because there was less time for review than I had hoped" * 'signal-for-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace: (44 commits) ptrace/m68k: Stop open coding ptrace_report_syscall ptrace: Remove unused regs argument from ptrace_report_syscall ptrace: Remove second setting of PT_SEIZED in ptrace_attach taskstats: Cleanup the use of task->exit_code exit: Use the correct exit_code in /proc/<pid>/stat exit: Fix the exit_code for wait_task_zombie exit: Coredumps reach do_group_exit exit: Remove profile_handoff_task exit: Remove profile_task_exit & profile_munmap signal: clean up kernel-doc comments signal: Remove the helper signal_group_exit signal: Rename group_exit_task group_exec_task coredump: Stop setting signal->group_exit_task signal: Remove SIGNAL_GROUP_COREDUMP signal: During coredumps set SIGNAL_GROUP_EXIT in zap_process signal: Make coredump handling explicit in complete_signal signal: Have prepare_signal detect coredumps using signal->core_state signal: Have the oom killer detect coredumps using signal->core_state exit: Move force_uaccess back into do_exit exit: Guarantee make_task_dead leaks the tsk when calling do_task_exit ...
2022-01-15Merge branch 'akpm' (patches from Andrew)Linus Torvalds
Merge misc updates from Andrew Morton: "146 patches. Subsystems affected by this patch series: kthread, ia64, scripts, ntfs, squashfs, ocfs2, vfs, and mm (slab-generic, slab, kmemleak, dax, kasan, debug, pagecache, gup, shmem, frontswap, memremap, memcg, selftests, pagemap, dma, vmalloc, memory-failure, hugetlb, userfaultfd, vmscan, mempolicy, oom-kill, hugetlbfs, migration, thp, ksm, page-poison, percpu, rmap, zswap, zram, cleanups, hmm, and damon)" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (146 commits) mm/damon: hide kernel pointer from tracepoint event mm/damon/vaddr: hide kernel pointer from damon_va_three_regions() failure log mm/damon/vaddr: use pr_debug() for damon_va_three_regions() failure logging mm/damon/dbgfs: remove an unnecessary variable mm/damon: move the implementation of damon_insert_region to damon.h mm/damon: add access checking for hugetlb pages Docs/admin-guide/mm/damon/usage: update for schemes statistics mm/damon/dbgfs: support all DAMOS stats Docs/admin-guide/mm/damon/reclaim: document statistics parameters mm/damon/reclaim: provide reclamation statistics mm/damon/schemes: account how many times quota limit has exceeded mm/damon/schemes: account scheme actions that successfully applied mm/damon: remove a mistakenly added comment for a future feature Docs/admin-guide/mm/damon/usage: update for kdamond_pid and (mk|rm)_contexts Docs/admin-guide/mm/damon/usage: mention tracepoint at the beginning Docs/admin-guide/mm/damon/usage: remove redundant information Docs/admin-guide/mm/damon/usage: update for scheme quotas and watermarks mm/damon: convert macro functions to static inline functions mm/damon: modify damon_rand() macro to static inline function mm/damon: move damon_rand() definition into damon.h ...
2022-01-15mm/mempolicy: wire up syscall set_mempolicy_home_nodeAneesh Kumar K.V
Link: https://lkml.kernel.org/r/20211202123810.267175-4-aneesh.kumar@linux.ibm.com Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Cc: Ben Widawsky <ben.widawsky@intel.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Feng Tang <feng.tang@intel.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Andi Kleen <ak@linux.intel.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Huang Ying <ying.huang@intel.com> Cc: <linux-api@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-01-14Merge tag 'powerpc-5.17-1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc updates from Michael Ellerman: - Optimise radix KVM guest entry/exit by 2x on Power9/Power10. - Allow firmware to tell us whether to disable the entry and uaccess flushes on Power10 or later CPUs. - Add BPF_PROBE_MEM support for 32 and 64-bit BPF jits. - Several fixes and improvements to our hard lockup watchdog. - Activate HAVE_DYNAMIC_FTRACE_WITH_REGS on 32-bit. - Allow building the 64-bit Book3S kernel without hash MMU support, ie. Radix only. - Add KUAP (SMAP) support for 40x, 44x, 8xx, Book3E (64-bit). - Add new encodings for perf_mem_data_src.mem_hops field, and use them on Power10. - A series of small performance improvements to 64-bit interrupt entry. - Several commits fixing issues when building with the clang integrated assembler. - Many other small features and fixes. Thanks to Alan Modra, Alexey Kardashevskiy, Ammar Faizi, Anders Roxell, Arnd Bergmann, Athira Rajeev, Cédric Le Goater, Christophe JAILLET, Christophe Leroy, Christoph Hellwig, Daniel Axtens, David Yang, Erhard Furtner, Fabiano Rosas, Greg Kroah-Hartman, Guo Ren, Hari Bathini, Jason Wang, Joel Stanley, Julia Lawall, Kajol Jain, Kees Cook, Laurent Dufour, Madhavan Srinivasan, Mark Brown, Minghao Chi, Nageswara R Sastry, Naresh Kamboju, Nathan Chancellor, Nathan Lynch, Nicholas Piggin, Nick Child, Oliver O'Halloran, Peiwei Hu, Randy Dunlap, Ravi Bangoria, Rob Herring, Russell Currey, Sachin Sant, Sean Christopherson, Segher Boessenkool, Thadeu Lima de Souza Cascardo, Tyrel Datwyler, Xiang wangx, and Yang Guang. * tag 'powerpc-5.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (240 commits) powerpc/xmon: Dump XIVE information for online-only processors. powerpc/opal: use default_groups in kobj_type powerpc/cacheinfo: use default_groups in kobj_type powerpc/sched: Remove unused TASK_SIZE_OF powerpc/xive: Add missing null check after calling kmalloc powerpc/floppy: Remove usage of the deprecated "pci-dma-compat.h" API selftests/powerpc: Add a test of sigreturning to an unaligned address powerpc/64s: Use EMIT_WARN_ENTRY for SRR debug warnings powerpc/64s: Mask NIP before checking against SRR0 powerpc/perf: Fix spelling of "its" powerpc/32: Fix boot failure with GCC latent entropy plugin powerpc/code-patching: Replace patch_instruction() by ppc_inst_write() in selftests powerpc/code-patching: Move code patching selftests in its own file powerpc/code-patching: Move instr_is_branch_{i/b}form() in code-patching.h powerpc/code-patching: Move patch_exception() outside code-patching.c powerpc/code-patching: Use test_trampoline for prefixed patch test powerpc/code-patching: Fix patch_branch() return on out-of-range failure powerpc/code-patching: Reorganise do_patch_instruction() to ease error handling powerpc/code-patching: Fix unmap_patch_area() error handling powerpc/code-patching: Fix error handling in do_patch_instruction() ...
2022-01-12Merge tag 'devicetree-for-5.17' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux Pull devicetree updates from Rob Herring: "Bindings: - DT schema conversions for Samsung clocks, RNG bindings, Qcom Command DB and rmtfs, gpio-restart, i2c-mux-gpio, i2c-mux-pinctl, Tegra I2C and BPMP, pwm-vibrator, Arm DSU, and Cadence macb - DT schema conversions for Broadcom platforms: interrupt controllers, STB GPIO, STB waketimer, STB reset, iProc MDIO mux, iProc PCIe, Cygnus PCIe PHY, PWM, USB BDC, BCM6328 LEDs, TMON, SYSTEMPORT, AMAC, Northstar 2 PCIe PHY, GENET, moca PHY, GISB arbiter, and SATA - Add binding schemas for Tegra210 EMC table, TI DC-DC converters, - Clean-ups of MDIO bus schemas to fix 'unevaluatedProperties' issues - More fixes due to 'unevaluatedProperties' enabling - Data type fixes and clean-ups of binding examples found in preparation to move to validating DTB files directly (instead of intermediate YAML representation. - Vendor prefixes for T-Head Semiconductor, OnePlus, and Sunplus - Add various new compatible strings DT core: - Silence a warning for overlapping reserved memory regions - Reimplement unittest overlay tracking - Fix stack frame size warning in unittest - Clean-ups of early FDT scanning functions - Fix handling of "linux,usable-memory-range" on EFI booted systems - Add support for 'fail' status on CPU nodes - Improve error message in of_phandle_iterator_next() - kbuild: Disable duplicate unit-address warnings for disabled nodes" * tag 'devicetree-for-5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (114 commits) dt-bindings: net: mdio: Drop resets/reset-names child properties dt-bindings: clock: samsung: convert S5Pv210 to dtschema dt-bindings: clock: samsung: convert Exynos5410 to dtschema dt-bindings: clock: samsung: convert Exynos5260 to dtschema dt-bindings: clock: samsung: extend Exynos7 bindings with UFS dt-bindings: clock: samsung: convert Exynos7 to dtschema dt-bindings: clock: samsung: convert Exynos5433 to dtschema dt-bindings: i2c: maxim,max96712: Add bindings for Maxim Integrated MAX96712 dt-bindings: iio: adi,ltc2983: Fix 64-bit property sizes dt-bindings: power: maxim,max17040: Fix incorrect type for 'maxim,rcomp' dt-bindings: interrupt-controller: arm,gic-v3: Fix 'interrupts' cell size in example dt-bindings: iio/magnetometer: yamaha,yas530: Fix invalid 'interrupts' in example dt-bindings: clock: imx5: Drop clock consumer node from example dt-bindings: Drop required 'interrupt-parent' dt-bindings: net: ti,dp83869: Drop value on boolean 'ti,max-output-impedance' dt-bindings: net: wireless: mt76: Fix 8-bit property sizes dt-bindings: PCI: snps,dw-pcie-ep: Drop conflicting 'max-functions' schema dt-bindings: i2c: st,stm32-i2c: Make each example a separate entry dt-bindings: net: stm32-dwmac: Make each example a separate entry dt-bindings: net: Cleanup MDIO node schemas ...
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