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2021-11-01parisc: decompressor: remove repeated depenency of misc.oMasahiro Yamada
The same dependency $(obj)/misc.o: $(obj)/sizes.h ... appears twice, at line 29 and line 55 in this Makefile. Remove the second one. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Signed-off-by: Helge Deller <deller@gmx.de>
2021-11-01parisc: Remove unused constants from asm-offsets.cHelge Deller
Signed-off-by: Helge Deller <deller@gmx.de>
2021-11-01parisc/ftrace: use static key to enable/disable function graph tracerSven Schnelle
This avoids using dereference_function_descriptor in the ftrace code path, and it's also faster. Signed-off-by: Sven Schnelle <svens@stackframe.org> Signed-off-by: Helge Deller <deller@gmx.de>
2021-11-01parisc/ftrace: set function trace functionSven Schnelle
With DYNAMIC_FTRACE, we need to implement ftrace_update_trace_func and not call ftrace_trace_function() directly, as ftrace doesn't expect calls to this function during code patching. Signed-off-by: Sven Schnelle <svens@stackframe.org> Signed-off-by: Helge Deller <deller@gmx.de>
2021-11-01parisc: Make use of the helper macro kthread_run()Cai Huoqing
Replace kthread_create/wake_up_process() with kthread_run() to simplify the code. Signed-off-by: Cai Huoqing <caihuoqing@baidu.com> Signed-off-by: Helge Deller <deller@gmx.de>
2021-11-01parisc: mark xchg functions notraceSven Schnelle
tracing the xchg functions leads to recursion in various places. Therefore mark the function as notrace. Signed-off-by: Sven Schnelle <svens@stackframe.org> Signed-off-by: Helge Deller <deller@gmx.de>
2021-11-01parisc: enhance warning regarding usage of O_NONBLOCKHelge Deller
Instead of showing only the very first application which needs recompile, show all of them, but print them only once. Includes typo fix noticed by Colin Ian King. Signed-off-by: Helge Deller <deller@gmx.de> Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
2021-11-01parisc: Drop ifdef __KERNEL__ from non-uapi kernel headersHelge Deller
Signed-off-by: Helge Deller <deller@gmx.de>
2021-11-01parisc: Use PRIV_USER and PRIV_KERNEL in ptrace.hHelge Deller
Signed-off-by: Helge Deller <deller@gmx.de>
2021-11-01parisc: Use PRIV_USER in syscall.SHelge Deller
Signed-off-by: Helge Deller <deller@gmx.de>
2021-11-01parisc/kgdb: add kgdb_roundup() to make kgdb work with idle pollingSven Schnelle
With idle polling, IPIs are not sent when a CPU idle, but queued and run later from do_idle(). The default kgdb_call_nmi_hook() implementation gets the pointer to struct pt_regs from get_irq_reqs(), which doesn't work in that case because it was not called from the IPI interrupt handler. Fix it by defining our own kgdb_roundup() function which sents an IPI_ENTER_KGDB. When that IPI is received on the target CPU kgdb_nmicallback() is called. Signed-off-by: Sven Schnelle <svens@stackframe.org> Signed-off-by: Helge Deller <deller@gmx.de>
2021-11-01parisc: Move thread_info into task structHelge Deller
This implements the CONFIG_THREAD_INFO_IN_TASK option. With this change: - before thread_info was part of the stack and located at the beginning of the stack - now the thread_info struct is moved and located inside the task_struct structure - the stack is allocated and handled like the major other platforms - drop the cpu field of thread_info and use instead the one in task_struct Signed-off-by: Helge Deller <deller@gmx.de> Signed-off-by: Sven Schnelle <svens@stackframe.org>
2021-11-01parisc: add support for TOC (transfer of control)Sven Schnelle
Almost all PA-RISC machines have either a button that is labeled with 'TOC' or a BMC function to trigger a TOC. TOC is a non-maskable interrupt that is sent to the processor. This can be used for diagnostic purposes like obtaining a stack trace/register dump or to enter KDB/KGDB. As an example, on my c8000, TOC can be used with: CONFIG_KGDB=y CONFIG_KGDB_KDB=y and the 'kgdboc=ttyS0,115200' appended to the command line. Press ^[( on serial console, which will enter the BMC command line, and enter 'TOC s': root@(none):/# ( cli>TOC s Sending TOC/INIT. <Cpu3> 2800035d03e00000 0000000040c21ac8 CC_ERR_CHECK_TOC <Cpu0> 2800035d00e00000 0000000040c21ad0 CC_ERR_CHECK_TOC <Cpu2> 2800035d02e00000 0000000040c21ac8 CC_ERR_CHECK_TOC <Cpu1> 2800035d01e00000 0000000040c21ad0 CC_ERR_CHECK_TOC <Cpu3> 37000f7303e00000 2000000000000000 CC_ERR_CPU_CHECK_SUMMARY <Cpu0> 37000f7300e00000 2000000000000000 CC_ERR_CPU_CHECK_SUMMARY <Cpu2> 37000f7302e00000 2000000000000000 CC_ERR_CPU_CHECK_SUMMARY <Cpu1> 37000f7301e00000 2000000000000000 CC_ERR_CPU_CHECK_SUMMARY <Cpu3> 4300100803e00000 c0000000001d26cc CC_MC_BR_TO_OS_TOC <Cpu0> 4300100800e00000 c0000000001d26cc CC_MC_BR_TO_OS_TOC <Cpu2> 4300100802e00000 c0000000001d26cc CC_MC_BR_TO_OS_TOC <Cpu1> 4300100801e00000 c0000000001d26cc CC_MC_BR_TO_OS_TOC Entering kdb (current=0x00000000411cef80, pid 0) on processor 0 due to NonMaskable Interrupt @ 0x40c21ad0 [0]kdb> Signed-off-by: Sven Schnelle <svens@stackframe.org> Signed-off-by: Helge Deller <deller@gmx.de>
2021-11-01parisc/firmware: add functions to retrieve TOC dataSven Schnelle
Add functions to retrieve TOC data from firmware both for 1.1 and 2.0 PDC. Signed-off-by: Sven Schnelle <svens@stackframe.org> Signed-off-by: Helge Deller <deller@gmx.de>
2021-11-01parisc: add PIM TOC data structuresSven Schnelle
These data structures describe the TOC data we get from firmware when issuing a PDC_PIM_TOC request. Signed-off-by: Sven Schnelle <svens@stackframe.org> Signed-off-by: Helge Deller <deller@gmx.de>
2021-11-01parisc: move virt_map macro to assembly.hSven Schnelle
This macro will also be used by the TOC code, so move it into asm/assembly.h to avoid duplication. Signed-off-by: Sven Schnelle <svens@stackframe.org> Signed-off-by: Helge Deller <deller@gmx.de>
2021-11-01parisc/unwind: fix unwinder when CONFIG_64BIT is enabledSven Schnelle
With 64 bit kernels unwind_special() is not working because it compares the pc to the address of the function descriptor. Add a helper function that compares pc with the dereferenced address. This fixes all of the backtraces on my c8000. Without this changes, a lot of backtraces are missing in kdb or the show-all-tasks command from /proc/sysrq-trigger. Signed-off-by: Sven Schnelle <svens@stackframe.org> Signed-off-by: Helge Deller <deller@gmx.de>
2021-11-01parisc: Fix ptrace check on syscall returnHelge Deller
The TIF_XXX flags are stored in the flags field in the thread_info struct (TI_FLAGS), not in the flags field of the task_struct structure (TASK_FLAGS). It seems this bug didn't generate any important side-effects, otherwise it wouldn't have went unnoticed for 12 years (since v2.6.32). Signed-off-by: Helge Deller <deller@gmx.de> Fixes: ecd3d4bc06e48 ("parisc: stop using task->ptrace for {single,block}step flags") Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: stable@vger.kernel.org
2021-10-30parisc: Use PRIV_USER instead of 3 in entry.SHelge Deller
Signed-off-by: Helge Deller <deller@gmx.de>
2021-10-30parisc: Use FRAME_SIZE and FRAME_ALIGN from assembly.hHelge Deller
Signed-off-by: Helge Deller <deller@gmx.de>
2021-10-30parisc: Allocate task struct with stack frame alignmentHelge Deller
We will put the stack directly behind the task struct, so make sure that we allocate it with an alignment of 64 bytes. Signed-off-by: Helge Deller <deller@gmx.de>
2021-10-30parisc: Define FRAME_ALIGN and PRIV_USER/PRIV_KERNEL in assembly.hHelge Deller
Signed-off-by: Helge Deller <deller@gmx.de>
2021-10-30parisc: fix warning in flush_tlb_allSven Schnelle
I've got the following splat after enabling preemption: [ 3.724721] BUG: using __this_cpu_add() in preemptible [00000000] code: swapper/0/1 [ 3.734630] caller is __this_cpu_preempt_check+0x38/0x50 [ 3.740635] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 5.15.0-rc4-64bit+ #324 [ 3.744605] Hardware name: 9000/785/C8000 [ 3.744605] Backtrace: [ 3.744605] [<00000000401d9d58>] show_stack+0x74/0xb0 [ 3.744605] [<0000000040c27bd4>] dump_stack_lvl+0x10c/0x188 [ 3.744605] [<0000000040c27c84>] dump_stack+0x34/0x48 [ 3.744605] [<0000000040c33438>] check_preemption_disabled+0x178/0x1b0 [ 3.744605] [<0000000040c334f8>] __this_cpu_preempt_check+0x38/0x50 [ 3.744605] [<00000000401d632c>] flush_tlb_all+0x58/0x2e0 [ 3.744605] [<00000000401075c0>] 0x401075c0 [ 3.744605] [<000000004010b8fc>] 0x4010b8fc [ 3.744605] [<00000000401080fc>] 0x401080fc [ 3.744605] [<00000000401d5224>] do_one_initcall+0x128/0x378 [ 3.744605] [<0000000040102de8>] 0x40102de8 [ 3.744605] [<0000000040c33864>] kernel_init+0x60/0x3a8 [ 3.744605] [<00000000401d1020>] ret_from_kernel_thread+0x20/0x28 [ 3.744605] Fix this by moving the __inc_irq_stat() into the locked section. Signed-off-by: Sven Schnelle <svens@stackframe.org> Signed-off-by: Helge Deller <deller@gmx.de>
2021-10-30parisc: disable preemption in send_IPI_allbutself()Sven Schnelle
Otherwise we might not stop all other CPUs. Signed-off-by: Sven Schnelle <svens@stackframe.org> Signed-off-by: Helge Deller <deller@gmx.de>
2021-10-30parisc: fix preempt_count() check in entry.SSven Schnelle
preempt_count in struct thread_info is unsigned int, but the entry.S code used LDREG, which generates a 64 bit load when compiled for 64 bit. Fix this to use an ldw and also change the condition in the compare one line below to only compares 32 bits, although ldw zero extends, and that should work with a 64 bit compare. Signed-off-by: Sven Schnelle <svens@stackframe.org> Signed-off-by: Helge Deller <deller@gmx.de>
2021-10-30parisc: deduplicate code in flush_cache_mm() and flush_cache_range()Sven Schnelle
Parts of both functions are the same, so deduplicate them. No functional change. Signed-off-by: Sven Schnelle <svens@stackframe.org> Signed-off-by: Helge Deller <deller@gmx.de>
2021-10-30parisc: disable preemption during local tlb flushSven Schnelle
flush_cache_mm() and flush_cache_range() fetch %sr3 via mfsp(). If it matches mm->context, they flush caches and the TLB. However, the TLB is cpu-local, so if the code gets preempted shortly after the mfsp(), and later resumed on another CPU, the wrong TLB is flushed. Signed-off-by: Sven Schnelle <svens@stackframe.org> Signed-off-by: Helge Deller <deller@gmx.de>
2021-10-30parisc: Add KFENCE supportHelge Deller
Signed-off-by: Helge Deller <deller@gmx.de>
2021-10-30parisc: Switch to ARCH_STACKWALK implementationHelge Deller
It's shorter and kfence currently depends on this stack unwinding implementation. Signed-off-by: Helge Deller <deller@gmx.de>
2021-10-30parisc: make parisc_acctyp() available outside of faults.cHelge Deller
When adding kfence support, we need to tell kfence_handle_page_fault() if the interrupted assembler statement is a read or write operation. Signed-off-by: Helge Deller <deller@gmx.de>
2021-10-30parisc/unwind: use copy_from_kernel_nofault()Sven Schnelle
I have no idea why get_user() is used there, but we're unwinding the kernel stack, so we should use copy_from_kernel_nofault(). Signed-off-by: Sven Schnelle <svens@stackframe.org> Signed-off-by: Helge Deller <deller@gmx.de>
2021-10-30locking: Remove spin_lock_flags() etcArnd Bergmann
parisc, ia64 and powerpc32 are the only remaining architectures that provide custom arch_{spin,read,write}_lock_flags() functions, which are meant to re-enable interrupts while waiting for a spinlock. However, none of these can actually run into this codepath, because it is only called on architectures without CONFIG_GENERIC_LOCKBREAK, or when CONFIG_DEBUG_LOCK_ALLOC is set without CONFIG_LOCKDEP, and none of those combinations are possible on the three architectures. Going back in the git history, it appears that arch/mn10300 may have been able to run into this code path, but there is a good chance that it never worked. On the architectures that still exist, it was already impossible to hit back in 2008 after the introduction of CONFIG_GENERIC_LOCKBREAK, and possibly earlier. As this is all dead code, just remove it and the helper functions built around it. For arch/ia64, the inline asm could be cleaned up, but it seems safer to leave it untouched. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Helge Deller <deller@gmx.de> # parisc Link: https://lore.kernel.org/r/20211022120058.1031690-1-arnd@kernel.org
2021-10-27ftrace: disable preemption when recursion locked王贇
As the documentation explained, ftrace_test_recursion_trylock() and ftrace_test_recursion_unlock() were supposed to disable and enable preemption properly, however currently this work is done outside of the function, which could be missing by mistake. And since the internal using of trace_test_and_set_recursion() and trace_clear_recursion() also require preemption disabled, we can just merge the logical. This patch will make sure the preemption has been disabled when trace_test_and_set_recursion() return bit >= 0, and trace_clear_recursion() will enable the preemption if previously enabled. Link: https://lkml.kernel.org/r/13bde807-779c-aa4c-0672-20515ae365ea@linux.alibaba.com CC: Petr Mladek <pmladek@suse.com> Cc: Guo Ren <guoren@kernel.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com> Cc: Helge Deller <deller@gmx.de> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Borislav Petkov <bp@alien8.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Jiri Kosina <jikos@kernel.org> Cc: Joe Lawrence <joe.lawrence@redhat.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Jisheng Zhang <jszhang@kernel.org> CC: Steven Rostedt <rostedt@goodmis.org> CC: Miroslav Benes <mbenes@suse.cz> Reported-by: Abaci <abaci@linux.alibaba.com> Suggested-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Michael Wang <yun.wang@linux.alibaba.com> [ Removed extra line in comment - SDR ] Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2021-10-24kbuild: use more subdir- for visiting subdirectories while cleaningMasahiro Yamada
Documentation/kbuild/makefiles.rst suggests to use "archclean" for cleaning arch/$(SRCARCH)/boot/, but it is not a hard requirement. Since commit d92cc4d51643 ("kbuild: require all architectures to have arch/$(SRCARCH)/Kbuild"), we can use the "subdir- += boot" trick for all architectures. This can take advantage of the parallel option (-j) for "make clean". I also cleaned up the comments in arch/$(SRCARCH)/Makefile. The "archdep" target no longer exists. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Reviewed-by: Kees Cook <keescook@chromium.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
2021-10-18mm: Add flush_dcache_folio()Matthew Wilcox (Oracle)
This is a default implementation which calls flush_dcache_page() on each page in the folio. If architectures can do better, they should implement their own version of it. Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Acked-by: Vlastimil Babka <vbabka@suse.cz>
2021-10-15sched: Add wrapper for get_wchan() to keep task blockedKees Cook
Having a stable wchan means the process must be blocked and for it to stay that way while performing stack unwinding. Suggested-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> [arm] Tested-by: Mark Rutland <mark.rutland@arm.com> [arm64] Link: https://lkml.kernel.org/r/20211008111626.332092234@infradead.org
2021-10-14Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski
tools/testing/selftests/net/ioam6.sh 7b1700e009cc ("selftests: net: modify IOAM tests for undef bits") bf77b1400a56 ("selftests: net: Test for the IOAM encapsulation with IPv6") Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-10-08ftrace: Cleanup ftrace_dyn_arch_init()Weizhao Ouyang
Most of ARCHs use empty ftrace_dyn_arch_init(), introduce a weak common ftrace_dyn_arch_init() to cleanup them. Link: https://lkml.kernel.org/r/20210909090216.1955240-1-o451686892@gmail.com Acked-by: Heiko Carstens <hca@linux.ibm.com> (s390) Acked-by: Helge Deller <deller@gmx.de> (parisc) Signed-off-by: Weizhao Ouyang <o451686892@gmail.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2021-10-08Merge tag 'asm-generic-fixes-5.15' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic Pull asm-generic fixes from Arnd Bergmann: "There is one build fix for Arm platforms that ended up impacting most architectures because of the way the drivers/firmware Kconfig file is wired up: The CONFIG_QCOM_SCM dependency have caused a number of randconfig regressions over time, and some still remain in v5.15-rc4. The fix we agreed on in the end is to make this symbol selected by any driver using it, and then building it even for non-Arm platforms with CONFIG_COMPILE_TEST. To make this work on all architectures, the drivers/firmware/Kconfig file needs to be included for all architectures to make the symbol itself visible. In a separate discussion, we found that a sound driver patch that is pending for v5.16 needs the same change to include this Kconfig file, so the easiest solution seems to have my Kconfig rework included in v5.15. Finally, the branch also includes a small unrelated build fix for NOMMU architectures" Link: https://lore.kernel.org/all/20210928153508.101208f8@canb.auug.org.au/ Link: https://lore.kernel.org/all/20210928075216.4193128-1-arnd@kernel.org/ Link: https://lore.kernel.org/all/20211007151010.333516-1-arnd@kernel.org/ * tag 'asm-generic-fixes-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: asm-generic/io.h: give stub iounmap() on !MMU same prototype as elsewhere qcom_scm: hide Kconfig symbol firmware: include drivers/firmware/Kconfig unconditionally
2021-10-07firmware: include drivers/firmware/Kconfig unconditionallyArnd Bergmann
Compile-testing drivers that require access to a firmware layer fails when that firmware symbol is unavailable. This happened twice this week: - My proposed to change to rework the QCOM_SCM firmware symbol broke on ppc64 and others. - The cs_dsp firmware patch added device specific firmware loader into drivers/firmware, which broke on the same set of architectures. We should probably do the same thing for other subsystems as well, but fix this one first as this is a dependency for other patches getting merged. Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Reviewed-by: Charles Keepax <ckeepax@opensource.cirrus.com> Acked-by: Will Deacon <will@kernel.org> Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org> Cc: Mark Brown <broonie@kernel.org> Cc: Liam Girdwood <lgirdwood@gmail.com> Cc: Charles Keepax <ckeepax@opensource.cirrus.com> Cc: Simon Trimmer <simont@opensource.cirrus.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Reviewed-by: Mark Brown <broonie@kernel.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2021-10-01audit: add support for the openat2 syscallRichard Guy Briggs
The openat2(2) syscall was added in kernel v5.6 with commit fddb5d430ad9 ("open: introduce openat2(2) syscall"). Add the openat2(2) syscall to the audit syscall classifier. Link: https://github.com/linux-audit/audit-kernel/issues/67 Link: https://lore.kernel.org/r/f5f1a4d8699613f8c02ce762807228c841c2e26f.1621363275.git.rgb@redhat.com Signed-off-by: Richard Guy Briggs <rgb@redhat.com> Acked-by: Christian Brauner <christian.brauner@ubuntu.com> [PM: merge fuzz due to previous header rename, commit line wraps] Signed-off-by: Paul Moore <paul@paul-moore.com>
2021-10-01audit: replace magic audit syscall class numbers with macrosRichard Guy Briggs
Replace audit syscall class magic numbers with macros. This required putting the macros into new header file include/linux/audit_arch.h since the syscall macros were included for both 64 bit and 32 bit in any compat code, causing redefinition warnings. Link: https://lore.kernel.org/r/2300b1083a32aade7ae7efb95826e8f3f260b1df.1621363275.git.rgb@redhat.com Signed-off-by: Richard Guy Briggs <rgb@redhat.com> Acked-by: Christian Brauner <christian.brauner@ubuntu.com> [PM: renamed header to audit_arch.h after consulting with Richard] Signed-off-by: Paul Moore <paul@paul-moore.com>
2021-10-01fix up for "net: add new socket option SO_RESERVE_MEM"Stephen Rothwell
Some architectures do not include uapi/asm/socket.h Fixes: 2bb2f5fb21b0 ("net: add new socket option SO_RESERVE_MEM") Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-09-30kprobes: treewide: Make it harder to refer kretprobe_trampoline directlyMasami Hiramatsu
Since now there is kretprobe_trampoline_addr() for referring the address of kretprobe trampoline code, we don't need to access kretprobe_trampoline directly. Make it harder to refer by renaming it to __kretprobe_trampoline(). Link: https://lkml.kernel.org/r/163163045446.489837.14510577516938803097.stgit@devnote2 Suggested-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2021-09-30kprobes: treewide: Remove trampoline_address from kretprobe_trampoline_handler()Masami Hiramatsu
The __kretprobe_trampoline_handler() callback, called from low level arch kprobes methods, has the 'trampoline_address' parameter, which is entirely superfluous as it basically just replicates: dereference_kernel_function_descriptor(kretprobe_trampoline) In fact we had bugs in arch code where it wasn't replicated correctly. So remove this superfluous parameter and use kretprobe_trampoline_addr() instead. Link: https://lkml.kernel.org/r/163163044546.489837.13505751885476015002.stgit@devnote2 Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Tested-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2021-09-19parisc: Declare pci_iounmap() parisc version only when CONFIG_PCI enabledHelge Deller
Linus noticed odd declaration rules for pci_iounmap() in iomap.h and pci_iomap.h, where it dependend on either NO_GENERIC_PCI_IOPORT_MAP or GENERIC_IOMAP when CONFIG_PCI was disabled. Testing on parisc seems to indicate that we need pci_iounmap() only when CONFIG_PCI is enabled, so the declaration of pci_iounmap() can be moved cleanly into pci_iomap.h in sync with the declarations of pci_iomap(). Link: https://lore.kernel.org/all/CAHk-=wjRrh98pZoQ+AzfWmsTZacWxTJKXZ9eKU2X_0+jM=O8nw@mail.gmail.com/ Signed-off-by: Helge Deller <deller@gmx.de> Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Fixes: 97a29d59fc22 ("[PARISC] fix compile break caused by iomap: make IOPORT/PCI mapping functions conditional") Cc: Arnd Bergmann <arnd@arndb.de> Cc: Guenter Roeck <linux@roeck-us.net> Cc: Ulrich Teichert <krypton@ulrich-teichert.org> Cc: James Bottomley <James.Bottomley@hansenpartnership.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-09-16parisc: Use absolute_pointer() to define PAGE0Helge Deller
Use absolute_pointer() wrapper for PAGE0 to avoid this compiler warning: arch/parisc/kernel/setup.c: In function 'start_parisc': error: '__builtin_memcmp_eq' specified bound 8 exceeds source size 0 Signed-off-by: Helge Deller <deller@gmx.de> Co-Developed-by: Guenter Roeck <linux@roeck-us.net> Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-09-09parisc: Implement __get/put_kernel_nofault()Helge Deller
Remove CONFIG_SET_FS from parisc, so we need to add __get_kernel_nofault() and __put_kernel_nofault(), define HAVE_GET_KERNEL_NOFAULT and remove set_fs(), get_fs(), load_sr2(), thread_info->addr_limit, KERNEL_DS and USER_DS. The nice side-effect of this patch is that we now can directly access userspace via sr3 without the need to use a temporary sr2 which is either copied from sr3 or set to zero (for kernel space). Signed-off-by: Helge Deller <deller@gmx.de> Suggested-by: Arnd Bergmann <arnd@kernel.org>
2021-09-09parisc: Mark sched_clock unstable only if clocks are not syncronizedHelge Deller
We check at runtime if the cr16 clocks are stable across CPUs. Only mark the sched_clock unstable by calling clear_sched_clock_stable() if we know that we run on a system which isn't syncronized across CPUs. Signed-off-by: Helge Deller <deller@gmx.de>
2021-09-09parisc: Reduce sigreturn trampoline to 3 instructionsHelge Deller
We can move the INSN_LDI_R20 instruction into the branch delay slot. Signed-off-by: Helge Deller <deller@gmx.de>
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