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2023-08-22parisc: Use generic mmap top-down layout and brk randomizationHelge Deller2-67/+1
parisc uses a top-down layout by default that exactly fits the generic functions, so get rid of arch specific code and use the generic version by selecting ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT. Note that on parisc the stack always grows up and a "unlimited stack" simply means that the value as defined in CONFIG_STACK_MAX_DEFAULT_SIZE_MB should be used. So RLIM_INFINITY is not an indicator to use the legacy memory layout. Signed-off-by: Helge Deller <[email protected]>
2023-08-22parisc: Fix /proc/cpuinfo output for lscpuHelge Deller1-3/+10
The lscpu command is broken since commit cab56b51ec0e ("parisc: Fix device names in /proc/iomem") added the PA pathname to all PA devices, includig the CPUs. lscpu parses /proc/cpuinfo and now believes it found different CPU types since every CPU is listed with an unique identifier (PA pathname). Fix this problem by simply dropping the PA pathname when listing the CPUs in /proc/cpuinfo. There is no need to show the pathname in this procfs file. Fixes: cab56b51ec0e ("parisc: Fix device names in /proc/iomem") Signed-off-by: Helge Deller <[email protected]> Cc: <[email protected]> # v4.9+
2023-08-20parisc: traps: Drop cpu_lpmc function pointerHelge Deller1-4/+1
This function pointer is only used by one function, so no need to keep such an indirection. Signed-off-by: Helge Deller <[email protected]>
2023-08-20parisc: Drop the pa7300lc LPMC handlerHelge Deller3-55/+1
This was actually never really used, and the info it prints won't help. Drop it. Signed-off-by: Helge Deller <[email protected]>
2023-08-20parisc: lasi: Register LASI power-off feature as sys_off_handlerHelge Deller1-6/+0
Prefer the Linux kernel sys_off_handler functionality over a home-grown implementation. Signed-off-by: Helge Deller <[email protected]>
2023-08-14parisc: Fix CONFIG_TLB_PTLOCK to work with lightweight spinlock checksHelge Deller1-24/+23
For the TLB_PTLOCK checks we used an optimization to store the spc register into the spinlock to unlock it. This optimization works as long as the lightweight spinlock checks (CONFIG_LIGHTWEIGHT_SPINLOCK_CHECK) aren't enabled, because they really check if the lock word is zero or __ARCH_SPIN_LOCK_UNLOCKED_VAL and abort with a kernel crash ("Spinlock was trashed") otherwise. Drop that optimization to make it possible to activate both checks at the same time. Noticed-by: Sam James <[email protected]> Signed-off-by: Helge Deller <[email protected]> Tested-by: Sam James <[email protected]> Cc: [email protected] # v6.4+ Fixes: 15e64ef6520e ("parisc: Add lightweight spinlock checks")
2023-08-11Merge tag 'io_uring-6.5-2023-08-11' of git://git.kernel.dk/linuxLinus Torvalds1-10/+5
Pull io_uring fixes from Jens Axboe: "A followup fix for the parisc/SHM_COLOUR fix, also from Helge, which is heading to stable. And then just the io_uring equivalent of the RESOLVE_CACHED fix in commit a0fc452a5d7f from last week for build_open_flags()" * tag 'io_uring-6.5-2023-08-11' of git://git.kernel.dk/linux: io_uring/parisc: Adjust pgoff in io_uring mmap() for parisc io_uring: correct check for O_TMPFILE
2023-08-10parisc: perf: Make cpu_device variable staticHelge Deller1-1/+1
Signed-off-by: Helge Deller <[email protected]>
2023-08-10parisc: ftrace: Add declaration for ftrace_function_trampoline()Helge Deller1-1/+1
Make sparse happy by adding declaration for ftrace_function_trampoline(). Signed-off-by: Helge Deller <[email protected]>
2023-08-10parisc: processor: Include asm/smp.h for init_per_cpu()Helge Deller1-0/+1
Fix sparse warning that init_per_cpu() isn't declared. Signed-off-by: Helge Deller <[email protected]>
2023-08-10parisc: unaligned: Include linux/sysctl.h for unaligned_enabledHelge Deller1-0/+1
Fix sparse warning that unaligned_enabled wasn't declared. Signed-off-by: Helge Deller <[email protected]>
2023-08-10parisc: Move proc_mckinley_root and proc_runway_root to sba_iommuHelge Deller2-49/+1
Clean up the procfs root entries for gsc, runway, and mckinley busses. Signed-off-by: Helge Deller <[email protected]>
2023-08-10parisc: dma: Add prototype for pcxl_dma_startHelge Deller1-1/+1
Signed-off-by: Helge Deller <[email protected]>
2023-08-10parisc: parisc_ksyms: Include libgcc.h for libgcc prototypesHelge Deller1-6/+1
Signed-off-by: Helge Deller <[email protected]>
2023-08-10parisc: firmware: Mark pdc_result buffers localHelge Deller1-2/+2
This fixes a sparse warning which suggest to make those static. Signed-off-by: Helge Deller <[email protected]>
2023-08-10parisc: firmware: Fix sparse context imbalance warningsHelge Deller1-2/+2
Tell sparse about correct context for pdc_cpu_rendezvous_*lock() functions. Signed-off-by: Helge Deller <[email protected]>
2023-08-10parisc: signal: Fix sparse incorrect type in assignment warningHelge Deller1-1/+1
Signed-off-by: Helge Deller <[email protected]>
2023-08-10parisc: pdt: Use PTR_ERR_OR_ZERO() to simplify codeYang Yingliang1-3/+1
Return PTR_ERR_OR_ZERO() instead of return 0 or PTR_ERR() to simplify code. Signed-off-by: Yang Yingliang <[email protected]> Signed-off-by: Helge Deller <[email protected]>
2023-08-10parisc: Fix lightweight spinlock checks to not break futexesHelge Deller1-3/+20
The lightweight spinlock checks verify that a spinlock has either value 0 (spinlock locked) and that not any other bits than in __ARCH_SPIN_LOCK_UNLOCKED_VAL is set. This breaks the current LWS code, which writes the address of the lock into the lock word to unlock it, which was an optimization to save one assembler instruction. Fix it by making spinlock_types.h accessible for asm code, change the LWS spinlock-unlocking code to write __ARCH_SPIN_LOCK_UNLOCKED_VAL into the lock word, and add some missing lightweight spinlock checks to the LWS path. Finally, make the spinlock checks dependend on DEBUG_KERNEL. Noticed-by: John David Anglin <[email protected]> Signed-off-by: Helge Deller <[email protected]> Tested-by: John David Anglin <[email protected]> Cc: [email protected] # v6.4+ Fixes: 15e64ef6520e ("parisc: Add lightweight spinlock checks")
2023-08-08io_uring/parisc: Adjust pgoff in io_uring mmap() for pariscHelge Deller1-10/+5
The changes from commit 32832a407a71 ("io_uring: Fix io_uring mmap() by using architecture-provided get_unmapped_area()") to the parisc implementation of get_unmapped_area() broke glibc's locale-gen executable when running on parisc. This patch reverts those architecture-specific changes, and instead adjusts in io_uring_mmu_get_unmapped_area() the pgoff offset which is then given to parisc's get_unmapped_area() function. This is much cleaner than the previous approach, and we still will get a coherent addresss. This patch has no effect on other architectures (SHM_COLOUR is only defined on parisc), and the liburing testcase stil passes on parisc. Cc: [email protected] # 6.4 Signed-off-by: Helge Deller <[email protected]> Reported-by: Christoph Biedl <[email protected]> Fixes: 32832a407a71 ("io_uring: Fix io_uring mmap() by using architecture-provided get_unmapped_area()") Fixes: d808459b2e31 ("io_uring: Adjust mapping wrt architecture aliasing requirements") Link: https://lore.kernel.org/r/ZNEyGV0jyI8kOOfz@p100 Signed-off-by: Jens Axboe <[email protected]>
2023-08-03parisc: unaligned: Add required spaces after ','[email protected]1-9/+9
Fix checkpatch warnings: unaligned.c:475: ERROR: space required after that ',' Signed-off-by: Yu Han <[email protected]> Signed-off-by: Helge Deller <[email protected]>
2023-08-03parisc: pci-dma: remove unused and dead EISA code and commentPetr Tesarik1-8/+0
Clearly, this code isn't needed, but it gives a false positive when grepping the complete source tree for coherent_dma_mask. Signed-off-by: Petr Tesarik <[email protected]> Signed-off-by: Helge Deller <[email protected]>
2023-07-27arch: Register fchmodat2, usually as syscall 452Palmer Dabbelt1-0/+1
This registers the new fchmodat2 syscall in most places as nuber 452, with alpha being the exception where it's 562. I found all these sites by grepping for fspick, which I assume has found me everything. Signed-off-by: Palmer Dabbelt <[email protected]> Signed-off-by: Alexey Gladkov <[email protected]> Acked-by: Arnd Bergmann <[email protected]> Acked-by: Geert Uytterhoeven <[email protected]> Message-Id: <a677d521f048e4ca439e7080a5328f21eb8e960e.1689092120.git.legion@kernel.org> Signed-off-by: Christian Brauner <[email protected]>
2023-07-22Merge tag 'io_uring-6.5-2023-07-21' of git://git.kernel.dk/linuxLinus Torvalds1-5/+10
Pull io_uring fixes from Jens Axboe: - Fix for io-wq not always honoring REQ_F_NOWAIT, if it was set and punted directly (eg via DRAIN) (me) - Capability check fix (Ondrej) - Regression fix for the mmap changes that went into 6.4, which apparently broke IA64 (Helge) * tag 'io_uring-6.5-2023-07-21' of git://git.kernel.dk/linux: ia64: mmap: Consider pgoff when searching for free mapping io_uring: Fix io_uring mmap() by using architecture-provided get_unmapped_area() io_uring: treat -EAGAIN for REQ_F_NOWAIT as final for io-wq io_uring: don't audit the capability check in io_uring_create()
2023-07-21io_uring: Fix io_uring mmap() by using architecture-provided get_unmapped_area()Helge Deller1-5/+10
The io_uring testcase is broken on IA-64 since commit d808459b2e31 ("io_uring: Adjust mapping wrt architecture aliasing requirements"). The reason is, that this commit introduced an own architecture independend get_unmapped_area() search algorithm which finds on IA-64 a memory region which is outside of the regular memory region used for shared userspace mappings and which can't be used on that platform due to aliasing. To avoid similar problems on IA-64 and other platforms in the future, it's better to switch back to the architecture-provided get_unmapped_area() function and adjust the needed input parameters before the call. Beside fixing the issue, the function now becomes easier to understand and maintain. This patch has been successfully tested with the io_uring testcase on physical x86-64, ppc64le, IA-64 and PA-RISC machines. On PA-RISC the LTP mmmap testcases did not report any regressions. Cc: [email protected] # 6.4 Signed-off-by: Helge Deller <[email protected]> Reported-by: matoro <[email protected]> Fixes: d808459b2e31 ("io_uring: Adjust mapping wrt architecture aliasing requirements") Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Jens Axboe <[email protected]>
2023-07-03parisc: syscalls: Avoid compiler warnings with W=1Helge Deller1-0/+3
We do not want to add prototypes for all parisc specific syscalls, so simply drop such warnings when building the kernel. Signed-off-by: Helge Deller <[email protected]>
2023-07-03parisc: unwind: Avoid missing prototype warning for handle_interruption()Helge Deller1-2/+3
Signed-off-by: Helge Deller <[email protected]>
2023-07-03parisc: smp: Add declaration for start_cpu_itimer()Helge Deller1-2/+0
Avoid gcc warning about missing prototype for start_cpu_itimer(). Signed-off-by: Helge Deller <[email protected]>
2023-07-03parisc: pdt: Get prototype for arch_report_meminfo()Helge Deller1-0/+1
Include linux/proc_fs.h to avoid compiler warning about missing prototype for 'arch_report_meminfo' Signed-off-by: Helge Deller <[email protected]>
2023-06-30parisc: irq: Add irq-related function declarationsHelge Deller1-4/+1
Move function declarations for do_cpu_irq_mask(), timer_interrupt() and ipi_interrupt() to header file. Signed-off-by: Helge Deller <[email protected]>
2023-06-30parisc: Move init function declarations into header fileHelge Deller1-20/+3
Clean up the code to not have external function declarations inside the C source files. Reduces warnings when compiled with W=1. Signed-off-by: Helge Deller <[email protected]>
2023-06-30parisc: unaligned: Include header file to avoid missing prototype warningsHelge Deller1-0/+1
Signed-off-by: Helge Deller <[email protected]>
2023-06-30parisc: signal: Mark do_notify_resume() and sys_rt_sigreturn() asmlinkageHelge Deller1-5/+5
Signed-off-by: Helge Deller <[email protected]>
2023-06-30parisc: unwind: Mark start and stop variables __maybe_unusedHelge Deller1-2/+3
Signed-off-by: Helge Deller <[email protected]>
2023-06-30parisc: traps: Mark functions staticHelge Deller1-5/+2
Signed-off-by: Helge Deller <[email protected]>
2023-06-30parisc: processor: Fix kdoc for init_cpu_profiler()Helge Deller1-1/+1
Signed-off-by: Helge Deller <[email protected]>
2023-06-30parisc: sys_parisc: parisc_personality() is called from asm codeHelge Deller1-1/+2
Signed-off-by: Helge Deller <[email protected]>
2023-06-30parisc: pci-dma: Make pcxl_alloc_range() staticHelge Deller1-1/+1
Signed-off-by: Helge Deller <[email protected]>
2023-06-30parisc: Mark image_size __maybe_unused in perf_write()Helge Deller1-1/+1
Signed-off-by: Helge Deller <[email protected]>
2023-06-30parisc: module: Mark symindex __maybe_unusedHelge Deller1-1/+1
Signed-off-by: Helge Deller <[email protected]>
2023-06-30parisc: pdc_chassis: Fix kdoc warningsHelge Deller1-6/+11
Signed-off-by: Helge Deller <[email protected]>
2023-06-30parisc: firmware: Fix kdoc warningsHelge Deller1-18/+21
Signed-off-by: Helge Deller <[email protected]>
2023-06-30parisc: drivers: Fix kdoc warningsHelge Deller1-16/+17
Signed-off-by: Helge Deller <[email protected]>
2023-06-30parisc: Fold 32-bit compat code into audit_classify_syscall()Helge Deller2-21/+4
No need to keep an extra 32-bit audit_classify_syscall() function. Signed-off-by: Helge Deller <[email protected]>
2023-06-30sticon/parisc: Allow 64-bit STI calls in PDC firmware abstrationHelge Deller1-7/+15
Some 64-bit machines require us to call the STI ROM in 64-bit mode, e.g. with the VisFXe graphic card. This patch allows drivers to use such 64-bit calling conventions. Tested-by: John David Anglin <[email protected]> Signed-off-by: Helge Deller <[email protected]>
2023-06-30parisc: Fix missing prototype warning for arch_report_meminfo()Helge Deller1-0/+1
Signed-off-by: Helge Deller <[email protected]> Reported-by: kernel test robot <[email protected]> Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/
2023-06-30parisc: Add cacheflush() syscallHelge Deller2-0/+50
Signed-off-by: Helge Deller <[email protected]>
2023-06-28Merge tag 'mm-nonmm-stable-2023-06-24-19-23' of ↵Linus Torvalds1-1/+0
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull non-mm updates from Andrew Morton: - Arnd Bergmann has fixed a bunch of -Wmissing-prototypes in top-level directories - Douglas Anderson has added a new "buddy" mode to the hardlockup detector. It permits the detector to work on architectures which cannot provide the required interrupts, by having CPUs periodically perform checks on other CPUs - Zhen Lei has enhanced kexec's ability to support two crash regions - Petr Mladek has done a lot of cleanup on the hard lockup detector's Kconfig entries - And the usual bunch of singleton patches in various places * tag 'mm-nonmm-stable-2023-06-24-19-23' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (72 commits) kernel/time/posix-stubs.c: remove duplicated include ocfs2: remove redundant assignment to variable bit_off watchdog/hardlockup: fix typo in config HARDLOCKUP_DETECTOR_PREFER_BUDDY powerpc: move arch_trigger_cpumask_backtrace from nmi.h to irq.h devres: show which resource was invalid in __devm_ioremap_resource() watchdog/hardlockup: define HARDLOCKUP_DETECTOR_ARCH watchdog/sparc64: define HARDLOCKUP_DETECTOR_SPARC64 watchdog/hardlockup: make HAVE_NMI_WATCHDOG sparc64-specific watchdog/hardlockup: declare arch_touch_nmi_watchdog() only in linux/nmi.h watchdog/hardlockup: make the config checks more straightforward watchdog/hardlockup: sort hardlockup detector related config values a logical way watchdog/hardlockup: move SMP barriers from common code to buddy code watchdog/buddy: simplify the dependency for HARDLOCKUP_DETECTOR_PREFER_BUDDY watchdog/buddy: don't copy the cpumask in watchdog_next_cpu() watchdog/buddy: cleanup how watchdog_buddy_check_hardlockup() is called watchdog/hardlockup: remove softlockup comment in touch_nmi_watchdog() watchdog/hardlockup: in watchdog_hardlockup_check() use cpumask_copy() watchdog/hardlockup: don't use raw_cpu_ptr() in watchdog_hardlockup_kick() watchdog/hardlockup: HAVE_NMI_WATCHDOG must implement watchdog_hardlockup_probe() watchdog/hardlockup: keep kernel.nmi_watchdog sysctl as 0444 if probe fails ...
2023-06-28Merge tag 'mm-stable-2023-06-24-19-15' of ↵Linus Torvalds3-6/+23
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull mm updates from Andrew Morton: - Yosry Ahmed brought back some cgroup v1 stats in OOM logs - Yosry has also eliminated cgroup's atomic rstat flushing - Nhat Pham adds the new cachestat() syscall. It provides userspace with the ability to query pagecache status - a similar concept to mincore() but more powerful and with improved usability - Mel Gorman provides more optimizations for compaction, reducing the prevalence of page rescanning - Lorenzo Stoakes has done some maintanance work on the get_user_pages() interface - Liam Howlett continues with cleanups and maintenance work to the maple tree code. Peng Zhang also does some work on maple tree - Johannes Weiner has done some cleanup work on the compaction code - David Hildenbrand has contributed additional selftests for get_user_pages() - Thomas Gleixner has contributed some maintenance and optimization work for the vmalloc code - Baolin Wang has provided some compaction cleanups, - SeongJae Park continues maintenance work on the DAMON code - Huang Ying has done some maintenance on the swap code's usage of device refcounting - Christoph Hellwig has some cleanups for the filemap/directio code - Ryan Roberts provides two patch series which yield some rationalization of the kernel's access to pte entries - use the provided APIs rather than open-coding accesses - Lorenzo Stoakes has some fixes to the interaction between pagecache and directio access to file mappings - John Hubbard has a series of fixes to the MM selftesting code - ZhangPeng continues the folio conversion campaign - Hugh Dickins has been working on the pagetable handling code, mainly with a view to reducing the load on the mmap_lock - Catalin Marinas has reduced the arm64 kmalloc() minimum alignment from 128 to 8 - Domenico Cerasuolo has improved the zswap reclaim mechanism by reorganizing the LRU management - Matthew Wilcox provides some fixups to make gfs2 work better with the buffer_head code - Vishal Moola also has done some folio conversion work - Matthew Wilcox has removed the remnants of the pagevec code - their functionality is migrated over to struct folio_batch * tag 'mm-stable-2023-06-24-19-15' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (380 commits) mm/hugetlb: remove hugetlb_set_page_subpool() mm: nommu: correct the range of mmap_sem_read_lock in task_mem() hugetlb: revert use of page_cache_next_miss() Revert "page cache: fix page_cache_next/prev_miss off by one" mm/vmscan: fix root proactive reclaim unthrottling unbalanced node mm: memcg: rename and document global_reclaim() mm: kill [add|del]_page_to_lru_list() mm: compaction: convert to use a folio in isolate_migratepages_block() mm: zswap: fix double invalidate with exclusive loads mm: remove unnecessary pagevec includes mm: remove references to pagevec mm: rename invalidate_mapping_pagevec to mapping_try_invalidate mm: remove struct pagevec net: convert sunrpc from pagevec to folio_batch i915: convert i915_gpu_error to use a folio_batch pagevec: rename fbatch_count() mm: remove check_move_unevictable_pages() drm: convert drm_gem_put_pages() to use a folio_batch i915: convert shmem_sg_free_table() to use a folio_batch scatterlist: add sg_set_folio() ...
2023-06-26Merge tag 'smp-core-2023-06-26' of ↵Linus Torvalds2-6/+5
ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull SMP updates from Thomas Gleixner: "A large update for SMP management: - Parallel CPU bringup The reason why people are interested in parallel bringup is to shorten the (kexec) reboot time of cloud servers to reduce the downtime of the VM tenants. The current fully serialized bringup does the following per AP: 1) Prepare callbacks (allocate, intialize, create threads) 2) Kick the AP alive (e.g. INIT/SIPI on x86) 3) Wait for the AP to report alive state 4) Let the AP continue through the atomic bringup 5) Let the AP run the threaded bringup to full online state There are two significant delays: #3 The time for an AP to report alive state in start_secondary() on x86 has been measured in the range between 350us and 3.5ms depending on vendor and CPU type, BIOS microcode size etc. #4 The atomic bringup does the microcode update. This has been measured to take up to ~8ms on the primary threads depending on the microcode patch size to apply. On a two socket SKL server with 56 cores (112 threads) the boot CPU spends on current mainline about 800ms busy waiting for the APs to come up and apply microcode. That's more than 80% of the actual onlining procedure. This can be reduced significantly by splitting the bringup mechanism into two parts: 1) Run the prepare callbacks and kick the AP alive for each AP which needs to be brought up. The APs wake up, do their firmware initialization and run the low level kernel startup code including microcode loading in parallel up to the first synchronization point. (#1 and #2 above) 2) Run the rest of the bringup code strictly serialized per CPU (#3 - #5 above) as it's done today. Parallelizing that stage of the CPU bringup might be possible in theory, but it's questionable whether required surgery would be justified for a pretty small gain. If the system is large enough the first AP is already waiting at the first synchronization point when the boot CPU finished the wake-up of the last AP. That reduces the AP bringup time on that SKL from ~800ms to ~80ms, i.e. by a factor ~10x. The actual gain varies wildly depending on the system, CPU, microcode patch size and other factors. There are some opportunities to reduce the overhead further, but that needs some deep surgery in the x86 CPU bringup code. For now this is only enabled on x86, but the core functionality obviously works for all SMP capable architectures. - Enhancements for SMP function call tracing so it is possible to locate the scheduling and the actual execution points. That allows to measure IPI delivery time precisely" * tag 'smp-core-2023-06-26' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/tip/tip: (45 commits) trace,smp: Add tracepoints for scheduling remotelly called functions trace,smp: Add tracepoints around remotelly called functions MAINTAINERS: Add CPU HOTPLUG entry x86/smpboot: Fix the parallel bringup decision x86/realmode: Make stack lock work in trampoline_compat() x86/smp: Initialize cpu_primary_thread_mask late cpu/hotplug: Fix off by one in cpuhp_bringup_mask() x86/apic: Fix use of X{,2}APIC_ENABLE in asm with older binutils x86/smpboot/64: Implement arch_cpuhp_init_parallel_bringup() and enable it x86/smpboot: Support parallel startup of secondary CPUs x86/smpboot: Implement a bit spinlock to protect the realmode stack x86/apic: Save the APIC virtual base address cpu/hotplug: Allow "parallel" bringup up to CPUHP_BP_KICK_AP_STATE x86/apic: Provide cpu_primary_thread mask x86/smpboot: Enable split CPU startup cpu/hotplug: Provide a split up CPUHP_BRINGUP mechanism cpu/hotplug: Reset task stack state in _cpu_up() cpu/hotplug: Remove unused state functions riscv: Switch to hotplug core state synchronization parisc: Switch to hotplug core state synchronization ...
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