TODO

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(Status & TODO 2019-04-06)
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= PA-RISC Linux TODO (actually this is Helge's TODO list) =
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= PA-RISC Linux TODO =
  
== Status & TODO 2019-04-06 ==
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== Status & TODO 2022-09-25 ==
* STARTED: Check Kernel boot code if RAM of machine is big enough (e.g. is booting on 710 machine with 60MB possible?) - https://patchwork.kernel.org/patch/10888283/
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* glibc iconv issues with qemu: https://sourceware.org/bugzilla/show_bug.cgi?id=29583
* Update latest QEMU successes.
+
* check glibc tst-pthread-timedlock-lockloop testcase failure (The futex facility returned an unexpected error code., xclock_gettime.c:29: clock_gettime (0): Unknown error -1)
* STARTED: Fix fallouts from strace, http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b7dc5a071ddf69c0350396b203cba32fe5bab510
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* check why raft package testcases fails with io_submit()?
* PALO - add regular rewind & load to avoid tftp boot timing issues. See mail from Frank Schreiner "PALO issues" (Dec 2018).
+
* Why is compiling fife so slow with cc1plus?
** Modify palo to be able to load lifimage file
+
* Add vDSI trampoline to qemu
* STARTED: Implement kernel VDSO support - https://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux.git/log/?h=vdso
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* Enhance vDSO: gettimeofday(), getcpu(),... see e.g.c32c47aa364096124c9c69c1a44918433832562b
** Get rid of executable stack, maybe use gateway page instead for signal returns?
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* SeaBIOS and palo: muldi3 and divdi3 (from libgcc.a) trashes fr22-fr25 because of xmpyu instruction. Doesn't seem to have negative effect, but those registers should better be saved/restored in pdc_entry() and iodc_entry(), or libgcc should be fixed to not use floating point instructions.
** [https://lore.kernel.org/linux-parisc/4544A34A.6080700@tausq.org/ Randolphs patch]
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* STARTED: Port grub2 to hppa? -> https://github.com/hdeller/grub
** [[Vdso]]
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* STARTED: [https://patchwork.kernel.org/project/linux-parisc/patch/20211031204952.25678-2-svens@stackframe.org/ Visualize FX framebuffer/DRM support (by Sven Schnelle)]
** Review gettimeofday and clock_gettime() implementation, possibly use a light-weight-syscall and rely on cr16 and cpu speed for more accurate timing? similiar to commit http://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/?id=18ad51dd342a7eb09dbcd059d0b451b616d4dafc
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* Implement ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT : https://lwn.net/ml/linux-kernel/20190724055850.6232-14-alex@ghiti.fr/
* STARTED: add dynamic ftrace support - http://git.kernel.org/cgit/linux/kernel/git/deller/parisc-linux.git/commit/?h=ftrace-dynamic&id=059645d9dadbd802d0487d1b8ab9b9269df18e0e
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* STARTED: improve unaligned handlers, e.g. to use get_user/put_user inline asm
* STARTED: convert old-style rtc driver drivers/input/misc/hp_sdc_rtc.c to new RTC model, remove the procfs and miscdevice interfaces first and replace the ioctl with a struct rtc_class_ops. Arnd Bergmann can review those patches, but Alexandre and Alessandro are the ones who would merge them once the driver is moved to drivers/rtc. (Mail from Arnd Bergmann, 28.04.2016) - see https://patchwork.kernel.org/patch/10701397/
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* [[VDSO]] - Review gettimeofday and clock_gettime() implementation, possibly use a light-weight-syscall and rely on cr16 and cpu speed for more accurate timing?  
 +
* Fix kernel: make ARCH=parisc tools/perf
 +
* trace irq flags - http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=24131a61ec8c2d83431cb818281d3c9db986ab08
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* Add core-objtool for parisc - http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=26660a4046b171a752e72a1dd32153230234fe3a
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* Add BPF assembler implementation
 +
* ONGOING: Enable UBSAN and fix fallouts* Enable BlockTLB on PA1.x for STI framebuffer (see block tlb info in sti.pdf documentation) and ftp://parisc.parisc-linux.org/docs/pdc32.pdf
 +
* Enable SPARSEMEM_VMEMMAP_ENABLE
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* STARTED: implement CONFIG_VMAP_STACK "virtually mapped stacks and thread_info cleanup" -> https://lwn.net/Articles/693026/
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* convert irq handling to use CONFIG_IRQ_DOMAIN_HIERARCHY (serial port problem, action handler msising when registering irq)
 
* check usage of CONFIG_MLONGCALLS, only 14MB/s with debian kernel and dd if=/dev/zero of=here bs=1k count=100000  ?
 
* check usage of CONFIG_MLONGCALLS, only 14MB/s with debian kernel and dd if=/dev/zero of=here bs=1k count=100000  ?
 +
* NO_IRQ -> should be converted to (0) instead of (-1) -> Helge (check assembly, check in drivers/parisc/*)
 +
* check assembly in drivers/parisc/*
 +
* INEQUIVALENT ALIASES occur building gnuradio on debian.
 +
* STARTED by Sven: Fix kexec on PA8800/PA8900 CPUs: how to restart the CPUs on these systems?
 +
* Add Linux kernel PIM driver - /sys/firmware/pim/*
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* parisc timers: convert to generic clockevent (Arnd Bergmann) - https://patchwork.kernel.org/project/linux-parisc/patch/20201008154651.1901126-14-arnd@arndb.de/
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* STARTED: convert old-style rtc driver drivers/input/misc/hp_sdc_rtc.c to new RTC model, remove the procfs and miscdevice interfaces first and replace the ioctl with a struct rtc_class_ops. Arnd Bergmann can review those patches, but Alexandre and Alessandro are the ones who would merge them once the driver is moved to drivers/rtc. (Mail from Arnd Bergmann, 28.04.2016) - see https://patchwork.kernel.org/patch/10701397/
 
* Add some cond_resched() calls to avoid RCU stalls, see commit 2a8bc5316adc998951e8f726c31e231a6021eae2
 
* Add some cond_resched() calls to avoid RCU stalls, see commit 2a8bc5316adc998951e8f726c31e231a6021eae2
* MAYBE: Implement DCACHE_WORD_ACCESS in kernel (Complaint from Linus)
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* Check if https://lkml.org/lkml/2020/7/23/1246 was added to avoid TLB stalls (commits https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c6fe44d96fc1536af5b11cd859686453d1b7bfd1 and https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2a9127fcf2296674d58024f83981f40b128fffea) - kernel v5.9 seems good.
* STARTED: implement kexec syscall
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* '''QEMU Full-system emulation'''
* STARTED: report on C8000 one socket with 2 cores (done), NUMA support?
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** Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> offers to do contract work for QEMU through his company.
* ONGOING: Enable UBSAN and fix fallouts
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** Fix migration of VMs (noticed by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>): Boot a qcow2 image in QEMU using the GTK, Wait a random time anywhere between 5-20s, Pause the VM, Switch to the "monitor" tab, Run "savevm foo" to save the current VM state as "foo", Type "quit" to exit QEMU, Add "-loadvm foo" to your QEMU command line and launch QEMU, Unpause the VM
* STARTED: implement CONFIG_VMAP_STACK "virtually mapped stacks and thread_info cleanup" -> https://lwn.net/Articles/693026/
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** Check "HPPA support for IGNITE-UX install discs" for HP Logic Analyzer 16700A (Mail from Keith Monahan <keith@techtravels.org> Sept 2020)
* STARTED: fix up __ro_after_init: http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d09e356ad06a8b6f5cceabf7c6cf05fdb62b46e5
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** STARTED: Finish LASI and 82596 NIC for QEMU -> https://github.com/hdeller/qemu-hppa/commits/lasi
* Fix kernel to load -fpie compiled programs not at 0x400000 (ELF_ET_DYN_BASE, e.g. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/commit/?h=linux-4.9.y&id=abb79a56898e044715d8efd07bc1902d27a94870)
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*** ncr53c710 driver from amiga: https://github.com/tonioni/WinUAE/blob/master/qemuvga/lsi53c710.cpp
* gcc optimizations:
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* '''QEMU User-mode emulation'''
 +
** STARTED: libime fails to build on real hardware but builds with qemu! -> bug in kernel fldw unalignment exception handler in ALL Linux kernel
 +
** check why qgis, plasma-framework,  kio-extras and fcitx5-chinese-addons fail to build with "Illegal instruction" error (https://buildd.debian.org/status/fetch.php?pkg=qgis&arch=hppa&ver=3.22.4%2Bdfsg-3&stamp=1645691873&raw=0)
 +
** qemu and executable stack: The following error occurred on pacific in mlton build: /usr/lib/mlton/mlton-compile: error while loading shared libraries: libm.so.6: cannot enable executable stack as shared object requires: Invalid argument
 +
** More exec stack errors: openssh, lnav
 +
** It looks like haskell packages still fail on qemu (e.g., haskell-swish).
 +
* '''JAVA'''
 +
** Finish OpenJDK, see patch and mail from Adrian Glaubitz 05.02.2021.
 +
** IMPORTANT: fix OpenJDK - fixes required in zeroport (stack grows up!).
 +
* '''Rust language'''
 +
**From Adrian Glaubitz (9/29/2021): The Rust project merged a change [1] that allows rustc to use GCC instead of LLVM as codegen backend for generating machine code through libgccjit. This means that we are in principal able now to build Rust code for all the architectures that GCC support but LLVM doesn't, which includes hppa. Please see this [2] and this [3] comment to see how to get started with cross-building the Rust compiler for a new target using libgccjit. We will have to add these new architectures to the libc crate first, see an example PR for that here [4]. Since I can't work on all these targets myself, I wanted to ask you to help me and get the support for hppa added to libc and rustc where necessary.
 +
*** [1] https://github.com/rust-lang/rust/pull/87260
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*** [2] https://github.com/rust-lang/rust/pull/87260#issuecomment-930221503
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*** [3] https://github.com/rust-lang/rust/pull/87260#issuecomment-930223504
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*** [4] https://github.com/rust-lang/libc/pull/2414
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* '''gcc compiler'''
 
** _mcount can be optimized (smaller) by not subtracting offset)
 
** _mcount can be optimized (smaller) by not subtracting offset)
 
** check if we can use -fentry from gcc for _mcount optimization
 
** check if we can use -fentry from gcc for _mcount optimization
 
** put PLABELS into read-only section (gcc function pa_reloc_rw_mask() needs modification, see "section mismatches" mails, 11.09.2017)
 
** put PLABELS into read-only section (gcc function pa_reloc_rw_mask() needs modification, see "section mismatches" mails, 11.09.2017)
* Enable huge pages on kernel text for C8000 as well
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** gcc: Add _builtin_thread_pointer() and _builtin_set_thread_pointer(), e.g.: https://gcc.gnu.org/ml/gcc-patches/2012-07/msg00428.html  for glibc: ports/sysdeps/hppa/nptl/tls.h __set_cr27()
* Enable BlockTLB on PA1.x for STI framebuffer (see block tlb info in sti.pdf documentation) and ftp://parisc.parisc-linux.org/docs/pdc32.pdf
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** STARTED: why is GNU AS so slow, e.g. when building freeorion, quantlib-swig or yade packages, testcases: openturns
* convert unaligned handler to use get_user/put_user inline asm
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*** http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=787192
* Fix shutdown: I had issued a "shutdown -r". As noted above, a panic occurred during the reboot (all CPUs were up). After this, stall messages were output to console after the bios version was printed. So yes, maybe CPUs should be "stopped" before a panic reboot? (by Dave, mail from 2017-03-31)
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*** https://sourceware.org/bugzilla/show_bug.cgi?id=18427
* Fix boot crash from Al Viro with sti gfx card (24.03.17)
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** provide libphobos packages - gcc-defaults - http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=763103, Work by Dave: https://gcc.gnu.org/ml/gcc-testresults/2018-11/msg03460.html
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** gcc -> join 32- and 64bit compiler, make "-m64" work, get rid of hppa64-linux-gnu-gcc
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* '''64-bit userspace support (from Dave Anglin, Nick Hudson)'''
 +
** 64-bit userspace, [[Binutils]] 64-bit binutils needs to be fixed to get multiple stub section support.
 +
** glibc port (hppa64 can use the generic thread code)
 +
** 64-bit support in gcc is probably pretty good as 64-bit HP-UX works fine.
 +
** gdb could be a problem due to a lack of a maintainer.
 +
 
 
* debian parisc perl bug (http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=721537) shows that mmap on parisc linux is horribly inefficient.  We allocate huge maps for small files. This should be improved. Mailthread: " parisc mmap: private file maps" ,http://www.spinics.net/lists/linux-parisc/msg05083.html  or  https://rt.perl.org/Public/Bug/Display.html?id=119567  https://rt.perl.org/Public/Bug/Display.html?id=119567  
 
* debian parisc perl bug (http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=721537) shows that mmap on parisc linux is horribly inefficient.  We allocate huge maps for small files. This should be improved. Mailthread: " parisc mmap: private file maps" ,http://www.spinics.net/lists/linux-parisc/msg05083.html  or  https://rt.perl.org/Public/Bug/Display.html?id=119567  https://rt.perl.org/Public/Bug/Display.html?id=119567  
* unaligned warning (from glibc) when running apt-get: https://sourceware.org/bugzilla/show_bug.cgi?id=20243
 
 
* kernel work
 
* kernel work
** trace irq flags - http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=24131a61ec8c2d83431cb818281d3c9db986ab08
 
** Add core-objtool for parisc - http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=26660a4046b171a752e72a1dd32153230234fe3a
 
 
** ALPHA processor port:
 
** ALPHA processor port:
 
*** Add https://lkml.org/lkml/2007/8/14/259 aboot patch
 
*** Add https://lkml.org/lkml/2007/8/14/259 aboot patch
 
*** New one: https://patchwork.kernel.org/patch/10141217/ (alpha: fix crash if pthread_create races with signal delivery)
 
*** New one: https://patchwork.kernel.org/patch/10141217/ (alpha: fix crash if pthread_create races with signal delivery)
 
*** Kernel patches: http://marc.info/?t=140610652200001&r=1&w=2, The proposed fix is in: http://marc.info/?t=140675670100010&r=1&w=2, http://marc.info/?t=142327510200001&r=1&w=2,  
 
*** Kernel patches: http://marc.info/?t=140610652200001&r=1&w=2, The proposed fix is in: http://marc.info/?t=140675670100010&r=1&w=2, http://marc.info/?t=142327510200001&r=1&w=2,  
** convert irq handling to use CONFIG_IRQ_DOMAIN_HIERARCHY (serial port problem, action handler msising when registering irq)
+
*** alpha qemu-user bug: https://gitlab.com/qemu-project/qemu/-/issues/494
** Circular dependency problems with kde packages caused by vlc and ffmpeg (Dave)
+
*** Solution: Rebuild ffmpeg outside the buildd (as some dependencies have probably been deleted) and upload a +b1 version. Then trigger bin-nmu of phonon package. Finally this resolves then the dependencies of vlc, ffmpeg, phonon, chromaprint, polkit-kde-agent-1, kwrited, kwallet-kf5 and  libkf5notifications-dev...
+
** Due to very bad performance running multiple copies of dot program (Dave)
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*** In vtk6 debian package, adding DOT_NUM_THREADS = 1 helps.
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*** Another issue that I have been wondering about is the performance of our kernel spinlock code.  PA 8800 and PA 8900 processors have a cache line length of 128 bytes.  I believe thereare some places where we assume 64 bytes.  We also allocate spinlocks on 16 byte boundaries. We might get better performance if we allocated on 32 (PA 1.X) and 128 (PA 2.0).  Helge: change: __PA_LDCW_ALIGNMENT
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*** I've also seen that better performance may be obtained by doing a byte store to spinlock prior to ldcw.  This dirties the cache line and allows operation in cache in certain situations. I think this mainly applies to PA 1.X but I'm not sure.  I have some example code somewhere. Helge:  change struct arch_spinlock_t; in spinlock_types.h
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** Implement ltrace on hppa
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** SLAB breaks, SLUB works, why? Mail from Guy Martin.
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** sparsemem: http://lwn.net/Articles/439472/ -> convert to sparsemem (http://lwn.net/Articles/440056/), patch available from James
+
 
** 3.14 partly: return ((unsigned long) mapping >> 7) & ((SHMLBA >> PAGE_SHIFT) - 1); in arch/parisc/kernel/sys_parisc.c
 
** 3.14 partly: return ((unsigned long) mapping >> 7) & ((SHMLBA >> PAGE_SHIFT) - 1); in arch/parisc/kernel/sys_parisc.c
** implement .con_font_set (consw) in sticon.c (to be able to change fonts at runtime)
+
* How to upgrade libgcc:
** why does mc hangs when exiting on sticon ?
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** apt install -f -o Dpkg::Options::="--force-overwrite"
** better implementation to get stack pointer (in return_address(), in stack checker in irq.c, ...)
+
** see: https://raphaelhertzog.com/2011/08/01/understanding-dpkgs-file-overwrite-error/
  
 
* Kernel: Hard to solve outstanding issues
 
* Kernel: Hard to solve outstanding issues
Line 60: Line 85:
 
** Fix FireGL X1/X3 in C8000 - currently broken (no DRM and software accel is incredibly slow <strike>plus colors in 24bpp mode are wrong</strike> seems ok in debian 8 sid / 3.16.7 kernel) - Info: manual "Radeon R5xx Acceleration" - http://www.x.org/docs/AMD/R5xx_Acceleration_v1.1.pdf  and generic: http://www.botchco.com/agd5f/?p=50  
 
** Fix FireGL X1/X3 in C8000 - currently broken (no DRM and software accel is incredibly slow <strike>plus colors in 24bpp mode are wrong</strike> seems ok in debian 8 sid / 3.16.7 kernel) - Info: manual "Radeon R5xx Acceleration" - http://www.x.org/docs/AMD/R5xx_Acceleration_v1.1.pdf  and generic: http://www.botchco.com/agd5f/?p=50  
  
* Kernel: still missing Linux kernel development (no patches available yet):
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* Kernel: still missing Linux kernel development (no patches available yet or maybe not possible to implement):
 +
** maybe: optimize flush_dcache_page() implementation like sparc. See Documentation/cachetlb.txt, e.g. used in aio subsystem
 
** maybe implement transparent huge pages (due to cache coherency technically only possible on PA8500-PA8700 CPUs, not possible on PA8800-PA8900 CPUs)
 
** maybe implement transparent huge pages (due to cache coherency technically only possible on PA8500-PA8700 CPUs, not possible on PA8800-PA8900 CPUs)
** optimize flush_dcache_page() implementation like sparc. See Documentation/cachetlb.txt, e.g. used in aio subsystem
+
** implement BUG() and WARN() with inline assembly so that interrupt happens in delay branch of "or,<> %r0,cond,%r0". Probably not possible, because gcc will report "control reaches end of non-void function" warnings/errors.
** NO_IRQ -> should be converted to (0) instead of (-1) -> Helge (check assembly, check in drivers/parisc/*)
+
** check assembly in drivers/parisc/*
+
** use pdc_add_valid() in kern_addr_valid(), protect against crashable acesses (like for superio-pc-drivers-detection in lp), add pdc_add_valid() to create a probe_kernel_read() implementation.
+
** arch/parisc/kernel/sys_parisc.c -> use SYSCALL_ALIAS() -> maybe
+
 
+
* Kernel: Low priority patches needs further work
+
 
** disable FP-register save/restore at kernel entry? - https://patchwork.kernel.org/patch/3975291/
 
** disable FP-register save/restore at kernel entry? - https://patchwork.kernel.org/patch/3975291/
 
** enable 16k/64k kernel page sizes (still cacheflushing-issues with SCSI driver, additional work in glibc needed to deal with >4k page size, e.g. ld-loader alignments of data/code segments)
 
** enable 16k/64k kernel page sizes (still cacheflushing-issues with SCSI driver, additional work in glibc needed to deal with >4k page size, e.g. ld-loader alignments of data/code segments)
 
** Superdome support - can someone test? Should work better now with latest kernels (maybe ask Dennis Clarke <dclarke@blastwave.org>, Jan 2019).
 
** Superdome support - can someone test? Should work better now with latest kernels (maybe ask Dennis Clarke <dclarke@blastwave.org>, Jan 2019).
** Visualize FX support (will probably never happen!)
 
** implement BUG() and WARN() with inline assembly so that interrupt happens in delay branch of "or,<> %r0,cond,%r0". Probably not possible, because gcc will report "control reaches end of non-void function" warnings/errors.
 
  
 
* Debian packages / Userspace work
 
* Debian packages / Userspace work
** IMPORTANT: fix OpenJDK - fixes required in zeroport (stack grows up!).
 
** Fix qemu  -> Richard Henderson started userspace-qemu in 11/2016: git://github.com/rth7680/qemu.git tgt-hppa
 
** 64-bit userspace, [[Binutils]] 64-bit binutils needs to be fixed to get multiple stub section support.
 
** gcc -> join 32- and 64bit compiler, make "-m64" work, get rid of hppa64-linux-gnu-gcc
 
* userspace
 
** elfutils -- testsuite error
 
** glib2.0 -- testsuite error
 
** gtk+3.0 succeeds by adding this to debian/rules: touch testsuite/reftests/color-transition.ui.known_fail testsuite/reftests/linear-gradient-transition-to-other.ui.known_fail
 
** libgadu - testsuite fails probably due to missing pthread cancellation in glibc.
 
** glibc pthread cancellation: the main issue is the target specific code needed to handle stubs and signal frames.  See linux-unwind.h and hpux-unwind.h in gcc's libgcc/config/pa directory.  The function pa32_fallback_frame_state does the hard work for linux.  Hopefully, the signal tramp hasn't changed. All the unwind tests in gcc pass, so I think the implementation there is okay. It may be we need something similar to pa32_fallback_frame_state in glibc to fix cancellation
 
** heimdal suceeds by increasing timeout for iprop test to 120 seconds.
 
** cupt - build errors
 
** libqb - testsuite error
 
** libsoup2.4 -- testsuite error
 
** DONE: capnproto - testsuite was wrong: PARISC uses mips-floatingpoint NANs - https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=781787
 
 
** teach "blkid" about palo partition
 
** teach "blkid" about palo partition
** STARTED: why is GNU AS so slow, e.g. when building freeorion, quantlib-swig or yade packages, testcases: openturns
 
*** https://sourceware.org/bugzilla/show_bug.cgi?id=18427
 
*** http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=787192
 
 
** glibc: add backtrace() function, problems when building elfutils package: http://buildd.debian-ports.org/status/package.php?p=elfutils&suite=sid
 
** glibc: add backtrace() function, problems when building elfutils package: http://buildd.debian-ports.org/status/package.php?p=elfutils&suite=sid
** gcc: Add _builtin_thread_pointer() and _builtin_set_thread_pointer(), e.g.: https://gcc.gnu.org/ml/gcc-patches/2012-07/msg00428.html  for glibc: ports/sysdeps/hppa/nptl/tls.h __set_cr27()
+
** Circular dependency problems with kde packages caused by vlc and ffmpeg (Dave)
** provide libphobos packages - gcc-defaults - http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=763103,  Work by Dave: https://gcc.gnu.org/ml/gcc-testresults/2018-11/msg03460.html
+
*** Solution: Rebuild ffmpeg outside the buildd (as some dependencies have probably been deleted) and upload a +b1 version. Then trigger bin-nmu of phonon package. Finally this resolves then the dependencies of vlc, ffmpeg, phonon, chromaprint, polkit-kde-agent-1, kwrited, kwallet-kf5 and  libkf5notifications-dev...
** gdb crashes Kernel - http://permalink.gmane.org/gmane.linux.ports.parisc/5406
+
** Due to very bad performance running multiple copies of dot program (Dave)
** debian-cd to use xorriso
+
*** In vtk6 debian package, adding DOT_NUM_THREADS = 1 helps.
** debian-cd: do not compress kernel.
+
 
 +
* Floating point NaN (see: https://en.wikipedia.org/wiki/NaN)
 +
** PA-RISC uses "mips" NaN format which differs from x86, etc. It should be called PA-RISC format as I think PA was first. The quiet NaN bit is opposite to than in current IEEE standard.  
 +
** Debian packages with NaN issues: libime, [https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=781787 capnproto]
 
    
 
    
 
* palo (PA-RISC Boot Loader):
 
* palo (PA-RISC Boot Loader):
 +
** PALO - add regular rewind & load to avoid tftp boot timing issues. See mail from Frank Schreiner "PALO issues" (Dec 2018).
 +
** When listing directory contents, resolve and print symlink target file names too, e.g. "vmlinux -> linux-5.12.1-64bit".
 
** Fix palo deb package to build iplboot natively (https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=851792)
 
** Fix palo deb package to build iplboot natively (https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=851792)
** Palo needs better user interaction instead of "0", "1".... Howtos.
 
 
** Modify (if possible), that palo can read (sequential) tftpbootable-vmlinuxes as well as the current boot-vmlinux images (simplifies build/handling)
 
** Modify (if possible), that palo can read (sequential) tftpbootable-vmlinuxes as well as the current boot-vmlinux images (simplifies build/handling)
  
 
== Upstream PA-RISC-related kernel patch history ==
 
== Upstream PA-RISC-related kernel patch history ==
 
* Kernel 3.8:
 
* Kernel 3.8:
** unbreak automounter support on 64-bit kernel with 32-bit userspace
+
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4f4ffc3a5398ef9bdbb32db04756d7d34e356fcf unbreak automounter support on 64-bit kernel with 32-bit userspace]
 
* Kernel 3.9:
 
* Kernel 3.9:
 
** Integrate Dave Anglin's latest cacheflush patchset (fixes unusual userspace crashes) https://patchwork.kernel.org/patch/2480891/ - Dave  
 
** Integrate Dave Anglin's latest cacheflush patchset (fixes unusual userspace crashes) https://patchwork.kernel.org/patch/2480891/ - Dave  
Line 341: Line 345:
 
** parisc: perf: return -EFAULT on error
 
** parisc: perf: return -EFAULT on error
 
** [http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=18d98a79382cbe5a7569788d5b7b18e7015506f2 parisc: Enable KASLR]
 
** [http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=18d98a79382cbe5a7569788d5b7b18e7015506f2 parisc: Enable KASLR]
** [http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=5c38602d83e584047906b41b162ababd4db4106d parisc: Re-enable interrupts early]
+
** <del>[http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=5c38602d83e584047906b41b162ababd4db4106d parisc: Re-enable interrupts early]</del>
 
** [http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=637250cc8f5e2bfc5c3a96802d1d96b4987a1d62 parisc: Enhance CPU detection code on PAT machines]
 
** [http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=637250cc8f5e2bfc5c3a96802d1d96b4987a1d62 parisc: Enhance CPU detection code on PAT machines]
 
** [http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=160494d381373cfa21208484aea4e5db2d3cb0a8 parisc: Optimize timer interrupt function]
 
** [http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=160494d381373cfa21208484aea4e5db2d3cb0a8 parisc: Optimize timer interrupt function]
Line 461: Line 465:
 
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fd8d0ca2563151204f3fe555dc8ca4bcfe8677a3 parisc: Hide virtual kernel memory layout] (backported to v4.15)
 
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fd8d0ca2563151204f3fe555dc8ca4bcfe8677a3 parisc: Hide virtual kernel memory layout] (backported to v4.15)
 
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0ed1fe4ad394e54783bbffa84102faf435661a2e parisc: Check if secondary CPUs want own PDC calls]  
 
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0ed1fe4ad394e54783bbffa84102faf435661a2e parisc: Check if secondary CPUs want own PDC calls]  
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5ffa8518851f1401817c15d2a7eecc0373c26ff9 parisc: Use cr16 interval timers unconditionally on qemu] (backported to v4.14+)
+
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5ffa8518851f1401817c15d2a7eecc0373c26ff9 parisc: Use cr16 interval timers unconditionally on qemu] (backported to v4.9+)
 
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=636a415bcc7f4fd020ece8fd5fc648c4cef19c34 parisc: Reduce irq overhead when run in qemu] (backported to v4.14+)
 
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=636a415bcc7f4fd020ece8fd5fc648c4cef19c34 parisc: Reduce irq overhead when run in qemu] (backported to v4.14+)
 
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0adb24e03a124b79130c9499731936b11ce2677d '''parisc: Fix ordering of cache and TLB flushes'''] (backported to v4.9+)
 
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0adb24e03a124b79130c9499731936b11ce2677d '''parisc: Fix ordering of cache and TLB flushes'''] (backported to v4.9+)
Line 478: Line 482:
 
** parisc: Directly call machine_power_off() in power button driver
 
** parisc: Directly call machine_power_off() in power button driver
 
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d5654e156bc4d68a87bbaa6d7e020baceddf6e68 '''parisc: Fix HPMC handler by increasing size to multiple of 16 bytes''']
 
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d5654e156bc4d68a87bbaa6d7e020baceddf6e68 '''parisc: Fix HPMC handler by increasing size to multiple of 16 bytes''']
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b845f66f78bf42a4ce98e5cfe0e94fab41dd0742 '''parisc/pci: Switch LBA PCI bus from Hard Fail to Soft Fail mode''']
+
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b845f66f78bf42a4ce98e5cfe0e94fab41dd0742 '''parisc/pci: Switch LBA PCI bus from Hard Fail to Soft Fail mode'''] (backported to all kernels: 3.18.111 4.4.134 4.9.104 4.14.45 4.16.13 4.17)
 
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a77ab0e7ce232a62adac3d85b9ae66d0f48385ac '''parisc: Add code generator for Qemu/SeaBIOS machine info''']
 
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a77ab0e7ce232a62adac3d85b9ae66d0f48385ac '''parisc: Add code generator for Qemu/SeaBIOS machine info''']
 
** parisc: Fix out of array access in match_pci_device()
 
** parisc: Fix out of array access in match_pci_device()
Line 536: Line 540:
 
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a886c9791aed64d73f8c0038cc1506741ba216fa '''parisc: Reorder TLB flush timing calculation''']
 
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a886c9791aed64d73f8c0038cc1506741ba216fa '''parisc: Reorder TLB flush timing calculation''']
 
** parisc: Remove PTE load and fault check from L2_ptep macro
 
** parisc: Remove PTE load and fault check from L2_ptep macro
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d27dfa13b9f77ae7e6ed09d70a0426ed26c1a8f9 '''parisc: Release spinlocks using ordered store''']
+
** <del>[http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d27dfa13b9f77ae7e6ed09d70a0426ed26c1a8f9 '''parisc: Release spinlocks using ordered store''']</del>
 
** parisc: Purge TLB entries after updating page table entry and set page accessed flag in TLB handler
 
** parisc: Purge TLB entries after updating page table entry and set page accessed flag in TLB handler
 
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1138b6718ff74d2a934459643e3754423d23b5e2 '''parisc: Fix address in HPMC IVA'''] (backported to all)
 
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1138b6718ff74d2a934459643e3754423d23b5e2 '''parisc: Fix address in HPMC IVA'''] (backported to all)
Line 573: Line 577:
 
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b102f29b2d8603f15071384e88125b8eab5f8faa '''parisc: Count IPI function call interrupts''']
 
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b102f29b2d8603f15071384e88125b8eab5f8faa '''parisc: Count IPI function call interrupts''']
 
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f73493eb4aecdd6edd8a749890e6e2dcfa0a7978 '''parisc: Improve initial IRQ to CPU assignment''']
 
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f73493eb4aecdd6edd8a749890e6e2dcfa0a7978 '''parisc: Improve initial IRQ to CPU assignment''']
** parisc: Use F_EXTEND() macro in iosapic code
+
** <del>parisc: Use F_EXTEND() macro in iosapic code</del> (reverted later on)
 
** parisc: Add constants for PDC_RELOCATE PDC call
 
** parisc: Add constants for PDC_RELOCATE PDC call
 
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8207d4ee44d3f525bf9aa57807ac9db5d0d90c1a '''parisc: Show machine product number during boot''']
 
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8207d4ee44d3f525bf9aa57807ac9db5d0d90c1a '''parisc: Show machine product number during boot''']
Line 583: Line 587:
 
** parisc: Add PDC_CRASH_PREP PDC function number
 
** parisc: Add PDC_CRASH_PREP PDC function number
 
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c2f8d7cb32cd95e3005bed58ce02afa686b9f357 Revert: parisc: Use F_EXTEND() macro in iosapic code]
 
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c2f8d7cb32cd95e3005bed58ce02afa686b9f357 Revert: parisc: Use F_EXTEND() macro in iosapic code]
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d006e95b5561f708d0385e9677ffe2c46f2ae345 '''parisc: Detect QEMU earlier in boot process'''] (backported to v4.14+)
+
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d006e95b5561f708d0385e9677ffe2c46f2ae345 '''parisc: Detect QEMU earlier in boot process'''] (backported to v4.9+)
 
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=45efd871bf0a47648f119d1b41467f70484de5bc '''parisc: regs_return_value() should return gpr28'''] (backported to v4.14+)
 
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=45efd871bf0a47648f119d1b41467f70484de5bc '''parisc: regs_return_value() should return gpr28'''] (backported to v4.14+)
 
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f324fa58327791b2696628b31480e7e21c745706 '''parisc: also set iaoq_b in instruction_pointer_set()'''] (backported to v4.19+)
 
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f324fa58327791b2696628b31480e7e21c745706 '''parisc: also set iaoq_b in instruction_pointer_set()'''] (backported to v4.19+)
 +
* Kernel 5.2
 +
**  parisc: Consider stack randomization for mmap base only when necessary
 +
**  [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3e1120f4b57bc12437048494ab56648edaa5b57d parisc: Export running_on_qemu symbol for modules] (backported to v4.9+)
 +
**  parisc: Tune LASI LAN for QEMU
 +
**  parisc: Skip registering LED when running in QEMU (backported to v4.9+)
 +
**  parisc: PA-Linux requires at least 32 MB RAM
 +
**  parisc: Show n/a if product number not available
 +
**  [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=dbdf0760990583649bfaca75fd98f76afd5f3905 '''parisc: Switch from DISCONTIGMEM to SPARSEMEM''']
 +
**  parisc: Add memory barrier to asm pdc and sync instructions (backported to v4.20+)
 +
**  [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d19a12906e5e558c0f6b6cfece7b7caf1012ef95 parisc: Allow live-patching of __meminit functions] (backported to v4.20+)
 +
**  parisc: Rename LEVEL to PA_ASM_LEVEL to avoid name clash with DRBD code (backported to all)
 +
**  parisc: Use PA_ASM_LEVEL in boot code (backported to v4.14+)
 +
**  [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=62217beb394e654bbd2bb87c533dadd2d8bf62c6 '''parisc: Add static branch and JUMP_LABEL feature''']
 +
**  [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6c63ef80014b60ab13bee7e683d0a95521bb7fdd '''parisc: Remove lock code to serialize TLB operations in pacache.S''']
 +
**  parisc: Use ldcw instruction for SMP spinlock release barrier
 +
**  [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=44224bdb99150ad17cf394973b25736cb92c246a parisc: Add memory clobber to TLB purges] (backported to v4.20+)
 +
**  parisc: Update huge TLB page support to use per-pagetable spinlock
 +
**  [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b37d1c1898b288c69f3dc9267bc2c41af06f4a4b '''parisc: Use per-pagetable spinlock''']
 +
**  parisc: add set_fixmap()/clear_fixmap()
 +
**  [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=620a53d522ba007a79fffc444bd75e8d3775f5b8 '''parisc: add parisc code patching''']
 +
**  [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=eacbfce19d8b6dbd7958cbe01d65a21324cc2fad '''parisc: add KGDB support''']
 +
**  parisc: add functions required by KPROBE_EVENTS
 +
**  [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8858ac8e9e9b1894f7bb218bc0035532371b8d7e '''parisc: Implement kprobes''']
 +
**  parisc: remove kprobes.h from generic-y
 +
**  [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e0b59b7b633ab72c08bb9bac36afaeaade011ddf '''parisc: Implement kretprobes''']
 +
**  doc: update kprobes supported architecture list
 +
**  parisc: remove unused flags parameter in __patch_text()
 +
**  parisc: update feature lists
 +
**  parisc: enable wide mode early
 +
**  [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e6eb5fe9123f05dcbf339ae5c0b6d32fcc0685d5 parisc: Drop LDCW barrier in CAS code when running UP]
 +
**  [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8d0e051cc75e2b1a7e2fd51fc56af332c9619618 parisc: Enable the ro_after_init feature]
 +
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=200036a8e802dee09103031eeeaea91dd212ec99 '''parisc: Allow building 64-bit kernel without -mlong-calls compiler option''']
 +
** parisc: Fix compiler warnings in float emulation code
 +
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=527a1d1ede98479bf90c31a64822107ac7e6d276 '''parisc: Fix crash due alternative coding for NP iopdir_fdc bit''']  (backported to v5.0+)
 +
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=63923d2c3800919774f5c651d503d1dd2adaddd5 '''parisc: Use implicit space register selection for loading the coherence index of I/O pdirs'''] (backported to all)
 +
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=116d753308cf032159c7b7aa87c9605bb5354784 '''parisc: Use lpa instruction to load physical addresses in driver code''']
 +
** parisc: configs: Remove useless UEVENT_HELPER_PATH
 +
** parisc: Kconfig: remove ARCH_DISCARD_MEMBLOCK
 +
** parisc/slab: cleanup after /proc/slab_allocators removal
 +
** parisc: Fix module loading error with JUMP_LABEL feature
 +
* Kernel 5.3
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6ca6366220ed285e29ee22f4cf5c68a0397cb005 '''parisc: add dynamic ftrace''']
 +
** compiler.h: add CC_USING_PATCHABLE_FUNCTION_ENTRY
 +
** parisc: add support for patching multiple words
 +
** parisc: add spinlock to patch function
 +
** parisc: add WARN_ON() to clear_fixmap
 +
** parisc: use pr_debug() in kernel/module.c
 +
** parisc: asm: psw.h: missing header guard
 +
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=10835c854685393a921b68f529bf740fa7c9984d '''parisc: Fix kernel panic due invalid values in IAOQ0 or IAOQ1'''] (backported to all)
 +
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=34c32fc603311a72cb558e5e337555434f64c27b '''parisc: Ensure userspace privilege for ptraced processes in regset functions'''] (backported to 4.7+)
 +
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=59a783dbc0d5fd6792aabff933055373b6dcbf2a '''parisc: Avoid kernel panic triggered by invalid kprobe'''] (backported to 5.2)
 +
** parisc: Wire up clone3 syscall
 +
** parisc: add kprobe_fault_handler()
 +
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=69245c97560b40f88c609b078f4b51c5be81d88b parisc: Flush ITLB in flush_tlb_all_local() only on split TLB machines]
 +
** parisc: Mark expected switch fall-throughs in fault.c
 +
** parisc: Fix fall-through warnings in fpudispatch.c
 +
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3fe6c873af2f2247544debdbe51ec29f690a2ccf parisc: Fix build of compressed kernel even with debug enabled]
 +
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e50beea8e7738377b4fa664078547be338038ff9 parisc: Strip debug info from kernel before creating compressed vmlinuz]
 +
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f2c5ed0dd5004c2cff5c0e3d430a107576fcc17f parisc: Add archclean Makefile target]
 +
** parisc: rename default_defconfig to defconfig
 +
** parisc: fix race condition in patching code
 +
* Kernel 5.4
 +
** <del>[http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=83af58f8068ea3f7b3c537c37a30887bfa585069 '''parisc: Add assembly implementations for memset, strlen, strcpy, strncpy and strcat''']</del> (was reverted)
 +
** parisc: Add ALTERNATIVE_CODE() and ALT_COND_RUN_ON_QEMU
 +
** parisc: speed up flush_tlb_all_local with qemu
 +
** parisc: Avoid warning when loading hppb driver
 +
** parisc: Convert eisa_enumerator to use pr_cont()
 +
** parisc: Drop comments which are already in pci.h
 +
** parisc: Save some bytes in dino driver
 +
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5fa1659105fac63e0f3c199b476025c2e04111ce '''parisc: Disable HP HSC-PCI Cards to prevent kernel crash'''] (backported to all)
 +
** parisc: Have git ignore generated real2.S and firmware.c
 +
** kprobes/parisc: remove arch_kprobe_on_func_entry()
 +
** parisc/ftrace: Add ARCH_SUPPORTS_FTRACE_OPS support
 +
** parisc/ftrace: Add KPROBES_ON_FTRACE
 +
** parisc: Update feature list
 +
** parisc: trigger die notifier chain in parisc_terminate()
 +
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=175fca3bf91a1111b7e46f6655666640556b9059 '''kexec: add KEXEC_ELF''']
 +
** kexec_elf: change order of elf_*_to_cpu() functions
 +
** kexec_elf: remove parsing of section headers
 +
** kexec_elf: remove PURGATORY_STACK_SIZE
 +
** kexec_elf: remove Elf_Rel macro
 +
** kexec_elf: remove unused variable in kexec_elf_load()
 +
** kexec_elf: support 32 bit ELF files
 +
** parisc: add __pdc_cpu_rendezvous()
 +
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fc697dc0c26a5908d467454e49440862d7fe96d0 '''parisc: add kexec syscall support''']
 +
** parisc: wire up kexec_file_load syscall
 +
** parisc: add support for kexec_file_load() syscall
 +
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c32c47aa364096124c9c69c1a44918433832562b parisc: Remove 32-bit DMA enforcement from sba_iommu]
 +
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=513f7f747e1cba81f28a436911fba0b485878ebd '''parisc: Fix vmap memory leak in ioremap()/iounmap()'''] (backported to v3.16+)
 +
** parisc: prefer __section from compiler_attributes.h
 +
** parisc: sysctl.c: Use CONFIG_PARISC instead of __hppa_ define
 +
** MAINTAINERS: Add hp_sdc drivers to parisc arch
 +
* Kernel 5.5
 +
** parisc: Do not hardcode registers in checksum functions
 +
** kexec: Fix pointer-to-int-cast warnings
 +
** parisc: Avoid spurious inequivalent alias kernel error messages
 +
** parisc: use pgtable-nopXd instead of 4level-fixup
 +
** parisc: soft_offline_page() now takes the pfn
 +
** parisc: Fix compiler warnings in debug_core.c
 +
** parisc: fix compilation when KEXEC=n and KEXEC_FILE=y
 +
** parisc: add missing __init annotation
 +
* Kernel 5.6
 +
** parisc: Regenerate parisc defconfigs
 +
** parisc: map_pages(): cleanup page table initialization
 +
** parisc: Fix defconfig selection
 +
* Kernel 5.7
 +
** parisc: remove nargs from __SYSCALL
 +
** parisc: Refactor alternative code to accept multiple conditions
 +
** parisc: Rework arch_rw locking functions
 +
** parisc: Improve interrupt handling in arch_spin_lock_flags()
 +
** parisc: Replace setup_irq() by request_irq()
 +
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bf71bc16e02162388808949b179d59d0b571b965 '''parisc: Fix kernel panic in mem_init()'''] (backported to all)
 +
* Kernel 5.8
 +
** parisc: use -fno-strict-aliasing for decompressor
 +
** parisc: suppress error messages for 'make clean'
 +
** parisc: Kconfig: Update references to parisc website
 +
** parisc: firmware: Update references to parisc website
 +
** parisc: hardware: Update references to parisc website
 +
** parisc: module: Update references to parisc website
 +
** parisc: MAINTAINERS: Update references to parisc website
 +
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b6522fa409cfafbc3968679b09e4028f0609f2b9 parisc: add sysctl file interface panic_on_stackoverflow]
 +
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=be6577af0cef934ccb036445314072e8cb9217b9 '''parisc: Add atomic64_set_release() define to avoid CPU soft lockups'''] (backported to all - fixes TLB stalls)
 +
** parisc: add support for cmpxchg on u8 pointers
 +
* Kernel 5.9
 +
** parisc: Replace HTTP links with HTTPS ones
 +
** parisc: Convert to BIT_MASK() and BIT_WORD()
 +
** parisc: Report bad pages as HardwareCorrupted
 +
** Revert "parisc: Improve interrupt handling in arch_spin_lock_flags()"
 +
** Revert "parisc: Drop LDCW barrier in CAS code when running UP"
 +
** Revert "parisc: Use ldcw instruction for SMP spinlock release barrier"
 +
** Revert "parisc: Revert "Release spinlocks using ordered store""
 +
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e72b23dec1da5e62a0090c5da1d926778284e230 '''parisc: Do not use an ordered store in pa_tlb_lock()'''] (backported to 5.0+)
 +
** parisc: elf.h: delete a duplicated word
 +
** parisc: make the log level string for register dumps const
 +
** sections.h: dereference_function_descriptor() returns void pointer
 +
** parisc: Whitespace cleanups in atomic.h
 +
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e96ebd589debd9a6a793608c4ec7019c38785dea '''parisc: Implement __smp_store_release and __smp_load_acquire barriers'''] (backported to 4.14+)
 +
** parisc/kernel/ftrace: Remove function callback casts
 +
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5b24993c21cbf2de11aff077a48c5cb0505a0450 '''parisc: mask out enable and reserved bits from sba imask'''] (backported to all)
 +
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6f6aea7e966cda5a817d091e938c2d9b52209893 '''parisc: fix PMD pages allocation by restoring pmd_alloc_one()''']
 +
* Kernel 5.10
 +
** parisc: disable CONFIG_IDE in defconfigs
 +
** fw_cfg: Add support for parisc architecture
 +
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=024f5b597564acced9e69305f7a9ef1202186a61 '''parisc: Add qemu fw_cfg interface''']
 +
** parisc: Avoid external interrupts when IPI finishes
 +
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=41f5a81c07cd410917c9ae3c165b9b761d48ba75 parisc: Drop HP-UX specific fcntl and signal flags]
 +
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=75ae04206a4d0e4f541c1d692b7febd1c0fdb814 '''parisc: Define O_NONBLOCK to become 000200000''']
 +
** parisc: Drop useless comments in uapi/asm/signal.h
 +
** parisc: Add ioread64_hi_lo() and iowrite64_hi_lo()
 +
** parisc: Install vmlinuz instead of zImage file
 +
** parisc: Add MAP_UNINITIALIZED define
 +
** parisc/sticon: Always register sticon console driver
 +
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7ff3f14ddc355bfbc94c766f43b90606b1f79e83 '''parisc/sticon: Add user font support''']
 +
** parisc: Add alternative patching to synchronize_caches define
 +
** parisc: Fix comments and enable interrupts later
 +
** parisc: Mark pointers volatile in __xchg8(), __xchg32() and __xchg64()
 +
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=53a42b6324b8ddce1e9d2f34da2ca68ef21c2084 '''parisc: Switch to more fine grained lws locks''']
 +
** parisc: Rewrite tlb flush threshold calculation
 +
** parisc: Improve spinlock handling
 +
** parisc: Improve error return codes when setting rtc time
 +
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=879bc2d27904354b98ca295b6168718e045c4aa2 '''hil/parisc: Disable HIL driver when it gets stuck''']
 +
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=44a4c9e443674e6cd3368d3e642dfe9c429d5525 '''parisc: Add wrapper syscalls to fix O_NONBLOCK flag usage''']
 +
** ata: pata_ns87415.c: Document support on parisc with superio chip
 +
* Kernel 5.11
 +
** parisc: pci-dma: fix warning unused-function
 +
** parisc/uapi: Use Kbuild logic to provide <asm/types.h>
 +
** parisc: Drop loops_per_jiffy from per_cpu struct
 +
** parisc: Use _TIF_USER_WORK_MASK in entry.S
 +
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=22ee3ea588dfc84ccb8cea5ea37051dfed91b9b9 parisc: Make user stack size configurable]
 +
** parisc: Remove leftover reference to the power_tasklet
 +
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=00e35f2b0e8acb88d4e1aa96ff0490e3bfe46580 '''parisc: Enable -mlong-calls gcc option by default when !CONFIG_MODULES'''] (backported to v5.6+)
 +
* Kernel 5.12
 +
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b7795074a04669d0a023babf786d29bf67c68783 '''parisc: Optimize per-pagetable spinlocks''']
 +
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2347961b11d4079deace3c81dceed460c08a8fc1 '''binfmt_misc: pass binfmt_misc flags to the interpreter'''] (needed for better qemu-user support on all platforms)
 +
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c70919bd9d0782a6078ccd37d7f861d514f5481e '''parisc: Fix IVT checksum calculation wrt HPMC''']
 +
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=31680c1d1595a59e17c14ec036b192a95f8e5f4a parisc: Bump 64-bit IRQ stack size to 64 KB]
 +
** parisc: Drop out of get_whan() if task is running again
 +
** parisc: Use the generic devmem_is_allowed()
 +
** parisc: Replace test_ti_thread_flag() with test_tsk_thread_flag()
 +
** parisc: Enable -mlong-calls gcc option with CONFIG_COMPILE_TEST (backported to v5.6+)
 +
** arch/parisc/kernel: remove duplicate include in ptrace
 +
** parisc: math-emu: Few spelling fixes in the file fpu.h
 +
** parisc: avoid a warning on u8 cast for cmpxchg on u8 pointers (backported to v5.8+)
 +
** parisc: parisc-agp requires SBA IOMMU driver (backported to all)
 +
** parisc: Remove duplicate struct task_struct declaration
 +
* Kernel 5.13
 +
** parisc: switch to generic syscall header scripts
 +
* Kernel 5.14
 +
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f6a3308d6feb351d9854eb8b3f6289a1ac163125 '''Revert "parisc: Add assembly implementations for memset, strlen, strcpy, strncpy and strcat"'''] (backported to 5.4+)
 +
* Kernel 5.15
 +
** parisc: switch from 'pci_' to 'dma_' API
 +
** parisc/parport_gsc: switch from 'pci_' to 'dma_' API
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=55b70eed81cba1331773d4aaf5cba2bb07475cd8 parisc: Increase size of gcc stack frame check]
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6f1fce595b78b775d7fb585c15c2dc3a6994f96e parisc: math-emu: Fix fall-through warnings]
 +
** parisc: Replace symbolic permissions with octal permissions
 +
** parisc: math-emu: Avoid "fmt" macro collision
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d220da0967dbda232350c5dc39317e04e0892743 parisc: remove unused arch/parisc/boot/install.sh and its phony target]
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6ef4661cad32b5098ffb31be3282c866befde85f parisc: move core-y in arch/parisc/Makefile to arch/parisc/Kbuild]
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5f6e0fe01b6b33894cf6f61b359ab5a6d2b7674e parisc: Fix compile failure when building 64-bit kernel natively]
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7bf82eb3873fbbee8273f60ddef584194b99f6c1 parisc: Rename PMD_ORDER to PMD_TABLE_ORDER]
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=030f653078316a9cc9ca6bd1b0234dcf858be35d '''parisc: fix crash with signals and alloca'''] (backported to all)
 +
** parisc: ccio-dma.c: Added tab instead of spaces
 +
** parisc: Make struct parisc_driver::remove() return void
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e5a2cac908df691f1637f9272d4c6dec83239611 parisc: Drop __arch_swab16(), arch_swab24(), _arch_swab32() and __arch_swab64() functions]
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c42813b71a06a2ff4a155aa87ac609feeab76cf3 '''parisc: Fix unaligned-access crash in bootloader'''] (backported to v5.14)
 +
** parisc: Move pci_dev_is_behind_card_dino to where it is used
 +
** parisc: Add missing FORCE prerequisite in Makefile
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1260dea6d2eb75706c978da828a36f0def590d3a '''parisc: Drop strnlen_user() in favour of generic version''']
 +
** parisc: Drop useless debug info and comments from signal.c
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3e4a1aff2a97cb4fd7f0268e4b69e8c9d3641277 parisc: Check user signal stack trampoline is inside TASK_SIZE]
 +
** <del>[https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e4f2006f1287e7ea17660490569cff323772dac4 '''parisc: Reduce sigreturn trampoline to 3 instructions''']</del> '''(was reverted in v5.15 and v5.16)'''
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d97180ad68bdb7ee10f327205a649bc2f558741d parisc: Mark sched_clock unstable only if clocks are not syncronized]
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=671028728083e856e9919221b109e3b2cd2ccc49 '''parisc: Implement __get/put_kernel_nofault()'''] (Dropped CONFIG_SET_FS incl. KERNEL_DS and USER_DS)
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=90cc7bed1ed19f869ae7221a6b41887fe762a6a3 parisc: Use absolute_pointer() to define PAGE0]
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9caea0007601d3bc6debec04f8b4cd6f4c2394be parisc: Declare pci_iounmap() parisc version only when CONFIG_PCI enabled]
 +
* Kernel 5.16
 +
** parisc: Make use of the helper macro kthread_run()
 +
** parisc: make parisc_acctyp() available outside of faults.c
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=aeb1e833a4c38efffad9556cf7f458c4e5de5b45 '''parisc: Switch to ARCH_STACKWALK implementation''']
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ec5c115050f59114e216212837f1c1ebc54bdfc9 '''parisc: Add KFENCE support''']
 +
** parisc: Define FRAME_ALIGN and PRIV_USER/PRIV_KERNEL in assembly.h
 +
** parisc: Allocate task struct with stack frame alignment
 +
** parisc: Use FRAME_SIZE and FRAME_ALIGN from assembly.h
 +
** parisc: Use PRIV_USER instead of 3 in entry.S
 +
** task_stack: Fix end_of_stack() for architectures with upwards-growing stack
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8779e05ba8aaffec1829872ef9774a71f44f6580 '''parisc: Fix ptrace check on syscall return'''] (backported to all)
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2214c0e77259b420402e279e9ab4277ef320d371 '''parisc: Move thread_info into task struct''']
 +
** parisc: Use PRIV_USER in syscall.S
 +
** parisc: Use PRIV_USER and PRIV_KERNEL in ptrace.h
 +
** parisc: Drop ifdef __KERNEL__ from non-uapi kernel headers
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3759778e6b8c0d547d77f681a7779edccdf1710a '''parisc: enhance warning regarding usage of O_NONBLOCK''']
 +
** parisc: Remove unused constants from asm-offsets.c
 +
** parisc: Update defconfigs
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6e866a462867b60841202e900f10936a0478608c '''parisc: Fix set_fixmap() on PA1.x CPUs'''] (backported to v5.3+)
 +
** parisc: decompressor: remove repeated depenency of misc.o
 +
** parisc: decompressor: clean up Makefile
 +
** parisc/unwind: use copy_from_kernel_nofault()
 +
** parisc: disable preemption during local tlb flush
 +
** parisc: deduplicate code in flush_cache_mm() and flush_cache_range()
 +
** parisc: fix preempt_count() check in entry.S
 +
** parisc: disable preemption in send_IPI_allbutself()
 +
** parisc: fix warning in flush_tlb_all
 +
** parisc/unwind: fix unwinder when CONFIG_64BIT is enabled
 +
** parisc: move virt_map macro to assembly.h
 +
** parisc: add PIM TOC data structures
 +
** parisc/firmware: add functions to retrieve TOC data
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bc294838cc3443a2fbec58f8936ad4bd0a0b3055 '''parisc: add support for TOC (transfer of control)''']
 +
** parisc/kgdb: add kgdb_roundup() to make kgdb work with idle polling
 +
** parisc: mark xchg functions notrace
 +
** parisc/ftrace: set function trace function
 +
** parisc/ftrace: use static key to enable/disable function graph tracer
 +
** parisc: Use swap() to swap values in setup_bootmem()
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=014966dcf76bce5717f7d974d0410d3402a651c2 '''parisc: don't enable irqs unconditionally in handle_interruption()''']
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7e992711dddbdb1c27d077432d8440fefd44819f '''parisc: Don't disable interrupts in cmpxchg and futex operations''']
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2a2e8202c7a16a85a881ad2b6e32ccbebdc01dda parisc: move CPU field back into thread_info]
 +
** <del>[https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=279917e27edc293eb645a25428c6ab3f3bca3f86 '''parisc: Fix backtrace to always include init funtion names''']</del> (backported to v5.4+ - and '''reverted in v5.16''')
 +
** parisc: Fix implicit declaration of function __kernel_text_address
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=38860b2c8bb1b92f61396eb06a63adff916fc31d '''parisc: Flush kernel data mapping in set_pte_at() when installing pte for user page'''] (backported to v5.12+)
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3ec18fc7831e7d79e2d536dd1f3bc0d3ba425e8a '''parisc/entry: fix trace test in syscall exit path''']  to-be-backported!
 +
** parisc: Include stringify.h to avoid build error in crypto/api.c
 +
** parisc: Wire up futex_waitv
 +
** parisc: Wrap assembler related defines inside __ASSEMBLY__
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=79df39d535c7a3770856fe9f5aba8c0ad1eebdb6 '''Revert "parisc: Reduce sigreturn trampoline to 3 instructions"'''] (reverted in v5.15 too)
 +
** parisc: Enable CONFIG_PRINTK_TIME=y in 32bit defconfig
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bec05f33ebc1006899c6d3e59a00c58881fe7626 '''parisc/sticon: fix reverse colors'''] (backported to all)
 +
** parisc: Increase FRAME_WARN to 2048 bytes on parisc
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=169d1a4a2adb2c246396c56aa2f9eec3868546f1 '''parisc: Provide an extru_safe() macro to extract unsigned bits''']
 +
** parisc: Convert PTE lookup to use extru_safe() macro
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=98400ad75e95860e9a10ec78b0b90ab66184a2ce '''Revert "parisc: Fix backtrace to always include init funtion names"'''] (backported to v5.4+)
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=df2ffeda6370a77011902e7c9d7a1eb1cbffed4f '''parisc: Fix extraction of hash lock bits in syscall.S''']
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1d7c29b77725d05faff6754d2f5e7c147aedcf93 parisc: Fix KBUILD_IMAGE for self-extracting kernel] (backported to v4.14+)
 +
** parisc: Enable sata sil, audit and usb support on 64-bit defconfig
 +
** parisc/agp: Annotate parisc agp init functions with __init
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0f9fee4cdebfbe695c297e5b603a275e2557c1cc parisc: Fix "make install" on newer debian releases] (backported to v3.13+)
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=afdb4a5b1d340e4afffc65daa21cc71890d7d589 '''parisc: Mark cr16 CPU clocksource unstable on all SMP machines'''] (backported to v4.14+)
 +
** parisc: Clear stale IIR value on instruction access rights trap
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8f66fce0f46560b9e910787ff7ad0974441c4f9c '''parisc: Correct completer in lws start'''] (backported to v4.19+)
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d3a5a68cff47f6eead84504c3c28376b85053242 '''parisc: Fix mask used to select futex spinlock'''] (backported to v5.10+)
 +
** parisc: remove ARCH_DEFCONFIG
 +
* Kernel 5.17
 +
** parisc: io: Improve the outb(), outw() and outl() macros
 +
** parisc: pdc_stable: use default_groups in kobj_type
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4b9d2a731c3d22a05c1bccdb11b6e00054ff5fda parisc: Switch user access functions to signal errors in r29 instead of r8]
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=712a270d2db967b387338c26c3dc04ccac3fcec3 parisc: Fix pdc_toc_pim_11 and pdc_toc_pim_20 definitions] (backported to v5.16)
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c1c72d9bbf2bf91670ac589adf037f433642fff5 parisc: Add kgdb io_module to read chars via PDC]
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d6ab9fc74513ae6501afcdae2547334a03b9a5c9 '''parisc: Enable TOC (transfer of contents) feature unconditionally''']
 +
** parisc: Re-use toc_stack as hpmc_stack
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=16f035d9e264d95d61d5f4056bb00d8169a7a3d1 '''sections: Fix __is_kernel() to include init ranges''']
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=68d247ad38b1ef46bd945a5220fa6d28c901c2f2 parisc: Default to 16 CPUs on 32-bit kernel]
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=45458aa49abe3b0ac68ce86b3d4ca3a97eaeac53 parisc: Define depi_safe macro]
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=db19c6f1a2a353cc8dec35b4789733a3cf6e2838 '''parisc: Fix lpa and lpa_user defines'''] (backported to v5.2+)
 +
** parisc: Avoid calling faulthandler_disabled() twice
 +
** parisc: Don't call faulthandler_disabled() in do_page_fault()
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=20dda87bdc6567e864942ead40bc149ebbe3ae79 parisc: Enhance page fault termination message]
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d0585d742ff2d82accd26c661c60a6d260429c4a '''parisc: Rewrite light-weight syscall and futex code''']
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=72c3dd8207de4178ae50553666129af7231f86e7 '''parisc: Add lws_atomic_xchg and lws_atomic_store syscalls''']
 +
** parisc: decompressor: do not copy source files while building
 +
** parisc: Add visible flag to toc_stack variable
 +
** parisc: Use safer strscpy() in setup_cmdline()
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5f7ee6e37a3cadefe45378c17c4285fa41141d92 '''parisc: Autodetect default output device and set console= kernel parameter''']
 +
** parisc: Fix missing prototype for 'toc_intr' warning in toc.c
 +
** parisc: pdc_stable: Fix memory leak in pdcs_register_pathentries
 +
** parisc: Add ioread64_lo_hi() and iowrite64_lo_hi()
 +
** <del>[https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b160628e9ebcdc85d0db9d7f423c26b3c7c179d0 '''parisc: Show error if wrong 32/64-bit compiler is being used'''] (backported to v5.15+)</del> (reverted in v6.0)
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=dbd0b42350d5717786cb8257fbe5b528f3af9772 '''parisc: Fix some apparent put_user() failures''']
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9129886b88185962538180625ca8051362b01327 '''parisc: Drop __init from map_pages declaration'''] (backported to v5.4+)
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b7d6f44a0fa716a82969725516dc0b16bc7cd514 '''parisc: Fix data TLB miss in sba_unmap_sg'''] (backported to all)
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d7da660cab47183cded65e11b64497d0f56c6edf '''parisc: Fix sglist access in ccio-dma.c'''] (backported to all)
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6e8793674bb0d1135ca0e5c9f7e16fecbf815926 serial: parisc: GSC: fix build when IOSAPIC is not set] (backported to all)
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a97279836867b1cb50a3d4f0b1bf60e0abe6d46c '''parisc/unaligned: Fix ldw() and stw() unalignment handlers'''] (backported to all)
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=dd2288f4a020d693360e3e8d72f8b9d9c25f5ef6 '''parisc/unaligned: Fix fldd and fstd unaligned handlers on 32-bit kernel'''] (backported to all)
 +
* Kernel 5.18
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=df24e1783e6e0eb3dc0e3ba5a8df3bb0cc537408 '''parisc: Add vDSO support''']
 +
** video/fbdev/stifb: Implement the stifb_fillrect() function
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b9f50eea4f277943842e82bc4d73f912a2f165c6 '''parisc: Always use the self-extracting kernel feature''']
 +
** parisc: Add defines for various space register
 +
** parisc: Use SR_USER and SR_KERNEL in get_user() and put_user()
 +
** parisc: Use constants to encode the space registers like SR_KERNEL
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8278cc16266326f23c05f94d748569faa81319bb '''parisc: Reduce code size by optimizing get_current() function calls''']
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=df24e1783e6e0eb3dc0e3ba5a8df3bb0cc537408 '''parisc/unaligned: Use EFAULT fixup handler in unaligned handlers''']
 +
** parisc/unaligned: Rewrite inline assembly of emulate_ldh()
 +
** parisc/unaligned: Rewrite inline assembly of emulate_ldw()
 +
** parisc/unaligned: Rewrite 32-bit inline assembly of emulate_ldd()
 +
** parisc/unaligned: Rewrite 32-bit inline assembly of emulate_sth()
 +
** parisc/unaligned: Enhance user-space visible output
 +
** parisc: Avoid calling SMP cache flush functions on cache-less machines
 +
** parisc: Enable ARCH_HAS_DEBUG_VM_PGTABLE
 +
** parisc: Improve CPU socket and core bootup info text
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9b046d0245cec982c72a65d3ea1b834959a9708b '''parisc: Avoid using hardware single-step in kprobes''']
 +
** parisc: Avoid flushing cache on cache-less machines
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=df24e1783e6e0eb3dc0e3ba5a8df3bb0cc537408 '''parisc: Fix non-access data TLB cache flush faults''']
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=df24e1783e6e0eb3dc0e3ba5a8df3bb0cc537408 '''parisc: Fix handling off probe non-access faults''']
 +
** parisc: Simplify fast path for non-access data TLB faults
 +
** parisc: Increase parisc_cache_flush_threshold setting
 +
** <del>[https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=53d862fac4a09b9c56cca0433fa9de5732fd05a1 '''parisc: Fix invalidate/flush vmap routines''']</del>
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=08a491b2e4b1c4c618ee82d3f4b0ff3b20c5acf5 '''Revert "parisc: Fix invalidate/flush vmap routines"''']
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=939fc856676c266c3bc347c1c1661872a3725c0f parisc: Fix CPU affinity for Lasi, WAX and Dino chips]
 +
** parisc: Clean up cpu_check_affinity() and drop cpu_set_affinity_irq()
 +
** parisc: Detect hppa-suse-linux-gcc compiler for cross-building
 +
** parisc: Add constants for control registers and clean up mfctl()
 +
** parisc: Ensure set_firmware_width() is called only once
 +
** parisc: Switch from GENERIC_CPU_DEVICES to GENERIC_ARCH_TOPOLOGY
 +
** parisc: Move store_cpu_topology() into text section
 +
** parisc: Move CPU startup-related functions into .text section
 +
** parisc: Move disable_sr_hashing_asm() into .text section
 +
** parisc: Add PDC locking functions for rendezvous code
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=88b3aac6228baaac6a3bcc0808845083b9d9f08f parisc: Implement __cpu_die() and __cpu_disable() for CPU hotplugging]
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=98903688e6106d9ca68e44c7d218e61336d54631 parisc: Rewrite arch_cpu_idle_dead() for CPU hotplugging]
 +
** parisc: Move common_stext into .text section when CONFIG_HOTPLUG_CPU=y
 +
** parisc: Find a new timesync master if current CPU is removed
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a9fe7fa7d874a536e0540469f314772c054a0323 '''parisc: Fix patch code locking and flushing''']
 +
** Revert "parisc: Mark cr16 CPU clocksource unstable on all SMP machines"
 +
** Revert "parisc: Mark sched_clock unstable only if clocks are not syncronized"
 +
** Revert "parisc: Fix patch code locking and flushing"
 +
** parisc: Only list existing CPUs in cpu_possible_mask
 +
** parisc: Update 32- and 64-bit defconfigs
 +
** parisc: Re-enable GENERIC_CPU_DEVICES for !SMP
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5b89966bc96a06f6ad65f64ae4b0461918fcc9d3 '''parisc: Merge model and model name into one line in /proc/cpuinfo'''] (backported to all)
 +
** parisc: Change MAX_ADDRESS to become unsigned long long
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=340233dcc0160aafcce46ca893d1679f16acf409 '''parisc: Mark cr16 clock unstable on all SMP machines'''] (backported to v5.16+)
 +
** Revert "parisc: Increase parisc_cache_flush_threshold setting"
 +
** parisc: Fix typos in comments
 +
** parisc: Disable debug code regarding cache flushes in handle_nadtlb_fault()
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2de8b4cc2051ee1d40eedbcf94de0e7d04507c37 '''parisc: Rewrite cache flush code for PA8800/PA8900''']
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=798082be69fea995a475ca1db8f9873589e207d9 '''parisc: Fix patch code locking and flushing''']
 +
* Kernel 5.19
 +
** parisc: video: fbdev: stifb: Add sti_dump_font() to dump STI font
 +
** parisc: Prevent ldil() to sign-extend into upper 32 bits
 +
** parisc: Fix wrong comment for shr macro
 +
** parisc: Add dep_safe() macro to deposit a register in 32- and 64-kernels
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c1770918492414e8dc103d996f3f3860ee0bfd6c '''parisc: Optimize tmpalias function calls''']
 +
** parisc: Drop __ARCH_WANT_OLD_READDIR and __ARCH_WANT_SYS_OLDUMOUNT
 +
** parisc: Don't enforce DMA completion order in cache flushes
 +
** parisc: Don't hardcode assembler bit definitions in tmpalias code
 +
** parisc/stifb: Implement fb_is_primary_device() (backported to v5.10+)
 +
** parisc/stifb: Keep track of hardware path of graphics card  (backported to v5.10+)
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6ba688364856ad083be537f08e86ba97f433d405 '''parisc: fix a crash with multicore scheduler'''] (backported to v5.18)
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1d0811b03eb30b2f0793acaa96c6ce90b8b9c87a parisc/stifb: Fix fb_is_primary_device() only available with CONFIG_FB_STI] (backported to v5.10+)
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0a1355db36718178becd2bfe728a023933d73123 '''parisc: Enable ARCH_HAS_STRICT_MODULE_RWX'''] (backported to v5.2+)
 +
** parisc: align '*' in comment in math-emu code
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e9ed22e6e5010997a2f922eef61ca797d0a2a246 '''parisc: Fix flush_anon_page on PA8800/PA8900'''] (backported to v5.18)
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=96b80fcd2705fc50ebe1f7f3ce204e861b3099ab '''parisc/unaligned: Fix emulate_ldw() breakage'''] (backported to v5.18)
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=aa78fa905b4431c432071a878da99c2b37fc0e79 '''parisc: Fix vDSO signal breakage on 32-bit kernel'''] (backported to v5.18)
 +
* Kernel 6.0
 +
** parisc: Clean up names in hardware database
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=cab56b51ec0e69128909cef4650e1907248d821b '''parisc: Fix device names in /proc/iomem'''] (backported to v4.9+)
 +
** parisc: Drop pa_swapper_pg_lock spinlock
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6431e92fc827bdd2d28f79150d90415ba9ce0d21 '''parisc: io_pgetevents_time64() needs compat syscall in 32-bit compat mode'''] (backported to v5.1+)
 +
** parisc: Fix comment typo in fault.c
 +
** parisc: Drop zero variable initialisations in mm/init.c
 +
** parisc: Check the return value of ioremap() in lba_driver_probe()
 +
** Input: gscps2 - check return value of ioremap() in gscps2_probe()
 +
** parisc: Do not initialise statics to 0
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7ae1f5508d9a33fd58ed3059bd2d569961e3b8bd '''parisc: Fix exception handler for fldw and fstw instructions'''] (backported to all)
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3dcfb729b5f4a0c9b50742865cd5e6c4dbcc80dc'''parisc: Make CONFIG_64BIT available for ARCH=parisc64 only'''] (backported to v5.15+)
 +
** Revert "parisc: Show error if wrong 32/64-bit compiler is being used"
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=591d2108f3abc4db9f9073cae37cf3591fd250d6 '''parisc: Add runtime check to prevent PA2.0 kernels on PA1.x machines''']
 +
** parisc: ccio-dma: Fix typo in comment
 +
** parisc: ccio-dma: Handle kmalloc failure in ccio_init_resources()
 +
** parisc: led: Move from strlcpy with unused retval to strscpy
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=95363747a6f39e88a3052fcf6ce6237769495ce0 '''tools/include/uapi: Fix <asm/errno.h> for parisc and xtensa'''] (backported to v5.10+)
 +
** [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=805ce8614958c925877ba6b6dc26cdf9f8800474 '''parisc: Allow CONFIG_64BIT with ARCH=parisc'''] (backported to v5.15+)
 +
** parisc: remove obsolete manual allocation aligning in iosapic
 +
** parisc: ccio-dma: Add missing iounmap in error path in ccio_probe()
  
  
Line 596: Line 1,004:
 
** DONE: in interactive mode, add reboot option command
 
** DONE: in interactive mode, add reboot option command
 
** DONE: [https://git.kernel.org/cgit/linux/kernel/git/deller/palo.git/commit/?id=70bd7a9a41e318c0575755a78c4d18ad97495c47 '''Unbreak loading Linux kernels bigger than 16 MB'''] (fixed in palo 1.96, Oct. 2016)
 
** DONE: [https://git.kernel.org/cgit/linux/kernel/git/deller/palo.git/commit/?id=70bd7a9a41e318c0575755a78c4d18ad97495c47 '''Unbreak loading Linux kernels bigger than 16 MB'''] (fixed in palo 1.96, Oct. 2016)
** DONE: Du to alternative coding in 4.20, ship debian kernel as SMP variant only (Kernel 4.20)  
+
** DONE: Du to alternative coding in 4.20, ship debian kernel as SMP variant only (Kernel 4.20)
 +
** DONE: PALO: Enable "list directory content" of other partiton than /boot (done in v2.22)
  
 
Debian kernel / Generic Kernel bugs fixed
 
Debian kernel / Generic Kernel bugs fixed
Line 628: Line 1,037:
 
** DONE: Implement alternative coding for UP & SMP, one debian kernel for UP and SMP, optimizations to avoid cache flushes on cache-less systems and other qemu-related speed-ups to avoid unnecessary syncronization (Kernel 4.20)  
 
** DONE: Implement alternative coding for UP & SMP, one debian kernel for UP and SMP, optimizations to avoid cache flushes on cache-less systems and other qemu-related speed-ups to avoid unnecessary syncronization (Kernel 4.20)  
 
** DONE: IRQ Balancing was broken, http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f73493eb4aecdd6edd8a749890e6e2dcfa0a7978
 
** DONE: IRQ Balancing was broken, http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f73493eb4aecdd6edd8a749890e6e2dcfa0a7978
 +
** DONE: Added kgdb and kprobes in kernel 5.2, by Sven Schnelle
 +
** DONE: report on C8000 one socket with 2 cores
 +
** DONE: Check Kernel boot code if RAM of machine is big enough (e.g. is booting on 710 machine with 60MB possible?) - https://patchwork.kernel.org/patch/10888283/
 +
** DONE: convert to SPARSEMEM, instead of DISCONTIGMEM
 +
** DONE: (NOT POSSIBLE:) Enable huge pages on kernel text for C8000 as well - not possible, will crash due to required equivalent aliasing of caches.
 +
** DONE: Enable __ro_after_init
 +
** DONE: add dynamic ftrace support - provided by Sven in kernel 5.3
 +
** DONE: Fix fallouts from strace: http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b7dc5a071ddf69c0350396b203cba32fe5bab510,
 +
** DONE: implement kexec syscall
 +
** DONE: Analyze futex hang (CPU soft lockup) situation with test-lock testcase in the libprelude debian package - fixed by [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=be6577af0cef934ccb036445314072e8cb9217b9 '''parisc: Add atomic64_set_release() define to avoid CPU soft lockups''']
 +
** DONE: Add TOC handler, sending TOC via IPMI interface "toc s"
 +
** DONE: autofs/automounter is broken, patch sent to list, https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=892953
 +
** DONE: Try enabling DEBUG_VM_PGTABLE in kernel
 +
** DONE: SLAB breaks, SLUB works (works in kernel v5.17)
 +
** DONE: implement .con_font_set (consw) in sticon.c to be able to change fonts at runtime (since v5.10)
 +
** DONE: Implement kernel [[VDSO]] support - [https://lore.kernel.org/linux-parisc/4544A34A.6080700@tausq.org/ Randolphs patch]
  
 
* Debian installer:
 
* Debian installer:
Line 656: Line 1,081:
 
*** packages needing rebuild: libatomic-ops (gauche and libgc have copies of libatomic-ops included), x265, ceph, lizardfs, firebird2.5, gauche, idba, mapsembler2, padevchooser, filezilla, idba, http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=785654
 
*** packages needing rebuild: libatomic-ops (gauche and libgc have copies of libatomic-ops included), x265, ceph, lizardfs, firebird2.5, gauche, idba, mapsembler2, padevchooser, filezilla, idba, http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=785654
 
*** __sync_val_compare_and_swap_8 was missing in: openvdb, idba, lizardfs, ...
 
*** __sync_val_compare_and_swap_8 was missing in: openvdb, idba, lizardfs, ...
 +
** DONE: [https://sourceware.org/bugzilla/show_bug.cgi?id=20243 Misaligned access in res_query.c HEADER struct] fixed in [https://sourceware.org/git/?p=glibc.git;a=commit;h=05dec22d7be722987ff07aebf9690f6078b3c4e9 this glibc commit]
  
 
* Debian userspace:
 
* Debian userspace:
Line 663: Line 1,089:
 
** DONE: Fix msgpuck build breakage: https://buildd.debian.org/status/package.php?p=msgpuck&suite=sid
 
** DONE: Fix msgpuck build breakage: https://buildd.debian.org/status/package.php?p=msgpuck&suite=sid
 
** DONE: Fix sbuild not returning used disc size: /usr/share/perl5/Sbuild/Build.pm line 2786, see https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=923484
 
** DONE: Fix sbuild not returning used disc size: /usr/share/perl5/Sbuild/Build.pm line 2786, see https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=923484
 +
** DONE: Why does mc hangs when exiting with F10? - https://midnight-commander.org/ticket/3887 - endianess bug in mc source code
 +
** DONE: capnproto - testsuite was wrong: PARISC uses mips-floatingpoint NANs - https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=781787
 +
 +
* QEMU:
 +
** DONE: Add kernel fw_cfg support (drivers/firmware/qemu_fw_cfg.c)
 +
** DONE: Fix mouse in with HP-UX 10 and 11 - reported by Stefano Repici
 +
** DONE: Add bigger fonts to STI ROM / SeaBIOS
 +
** DONE: Implement TOC in qemu (via qemu monitor -> NMI)
 +
** DONE: Fix X11 cursor emulation in HP-UX with help of Xorg 11.6.6 sources, fixed in qemu v7.1
 +
** DONE: Fix serial port assignment and pass-through, fixed in qemu v7.1
 +
** DONE: Check why ldd doesn't work with qemu chroot -> misexecuttion of proberi instruction: https://lists.nongnu.org/archive/html/qemu-devel/2022-08/msg02338.html
 +
** DONE: [https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=970460 qemu-user: trashes argv0 breaking multi-call binaries], leads to build failures in lilypond, fceux, perl, sane-backends ... Fixed, needs [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2347961b11d4079deace3c81dceed460c08a8fc1 kernel v5.12+] and [https://git.qemu.org/?p=qemu.git;a=commit;h=6e1c0d7b951e19c53b8467e8bc4b71ee73a394ea qemu v6.0+],  or alternatively apply [https://github.com/hdeller/qemu-hppa/commit/540e8fb618e66b4c172cc528c12580bb09e301b6 linux-user: handle binfmt-misc P flag as a separate exe name]
  
== ABI breakages (HP-UX support) ==
+
== ABI breakages (e.g. dropped HP-UX support) ==
* [http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f5a408d53edef3af07ac7697b8bc54a755628450 We dropped HP-UX support in kernel 3.14 by changing EWOULDBLOCK==EAGAIN.] HP-UX could be run in a VM instead or since machines are relatively cheap now, if someone needs hpux, they can buy a machine for it.  
+
* '''Kernel 3.14 (EWOULDBLOCK)'''
* [http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1f25df2eff5b25f52c139d3ff31bc883eee9a0ab Changed RTSIGMIN to 32 (from 37)]
+
** [http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f5a408d53edef3af07ac7697b8bc54a755628450 We dropped HP-UX support in kernel 3.14 by changing EWOULDBLOCK==EAGAIN.] HP-UX could be run in a VM instead or since machines are relatively cheap now, if someone needs hpux, they can buy a machine for it (or use qemu)
 +
* '''Kernel 3.16 (SIGRTMIN)'''
 +
** [http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1f25df2eff5b25f52c139d3ff31bc883eee9a0ab Changed SIGRTMIN to 32 (from 37)]
 
** [http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=766605 debian glibc report]  and  [http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=766635 debian kernel bug report]
 
** [http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=766605 debian glibc report]  and  [http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=766635 debian kernel bug report]
 
** September 7th 2014: First delivery with vmlinux-3.16.0-4 (aka linux-image-3.16.0-4-parisc64-smp_3.16.7-1_hppa.deb)
 
** September 7th 2014: First delivery with vmlinux-3.16.0-4 (aka linux-image-3.16.0-4-parisc64-smp_3.16.7-1_hppa.deb)
** rebuild of following packages needed:
+
** How to install:
 +
*** Install the new glibc debian package, then install systemd, then install the new kernel package (this will create a new initrd), reboot
 +
** rebuild of the following packages was needed:
 
*** unxz-utils: rebuild unxz to fix usage of SIGXFSZ
 
*** unxz-utils: rebuild unxz to fix usage of SIGXFSZ
 
*** strace and gdb: fix signal names/numbers
 
*** strace and gdb: fix signal names/numbers
Line 675: Line 1,117:
 
*** (maybe) gcc-4.9 which links against libgc...? (affects objc related code only)
 
*** (maybe) gcc-4.9 which links against libgc...? (affects objc related code only)
 
*** dietlibc (patch sent upstream) - https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=769105  TODO: make patch for dietlibc to use LONG_LONG_PAIR for ftruncate64() and then rebuild util-vserver package
 
*** dietlibc (patch sent upstream) - https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=769105  TODO: make patch for dietlibc to use LONG_LONG_PAIR for ftruncate64() and then rebuild util-vserver package
* [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=93cb8e20d56be40c541475f77b5f565fbb385a4b Dropped ENOTSUP (252) constant from kernel with v4.19]. Gave problems and parisc is only platform which defined it because of HP-UX, see libuv bug: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=900237. Nevertheless rebuild of libattr, libseliux and fakeroot necessary.
+
* '''Kernel 4.19 (ENOTSUP)'''
 +
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=93cb8e20d56be40c541475f77b5f565fbb385a4b Dropped ENOTSUP (252) constant from kernel with v4.19]. Gave problems and parisc is only platform which defined it because of HP-UX, see libuv bug: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=900237. Nevertheless rebuild of libattr, libseliux and fakeroot necessary.
 +
* '''Kernel 5.10: Define O_NONBLOCK to become 000200000 (instead of 000200004):'''
 +
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=75ae04206a4d0e4f541c1d692b7febd1c0fdb814 '''parisc: Define O_NONBLOCK to become 000200000''']
 +
** [http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=44a4c9e443674e6cd3368d3e642dfe9c429d5525 '''parisc: Add wrapper syscalls to fix O_NONBLOCK flag usage''']
 +
** [https://sourceware.org/git?p=glibc.git;a=commit;h=a24f414ba11a7acdf3c5ccec3fb327fc72166556 '''GLIBC PATCH: Remove obsolete defines for HPUX support from fcntl.h and update O_NONBLOCK.''']
 +
** [https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=974690 ''dietlibc Debian bug report'']
  
 
== Considerations between Debian unstable and Debian Jessie release ==
 
== Considerations between Debian unstable and Debian Jessie release ==
Line 731: Line 1,179:
  
 
* ns87415 dma doesn't work reliably on suckyio-systems
 
* ns87415 dma doesn't work reliably on suckyio-systems
 
 
* fix HIL problem: ksoftirqd/0 eats 56% cpu (kernel 2.4 & kernel 2.6) - see FAQ: http://www.parisc-linux.org/faq/index.html and http://article.gmane.org/gmane.linux.ports.parisc/278/match=use+lower+nice+level+ksoftirqd+hil+enabled
 
* fix HIL problem: ksoftirqd/0 eats 56% cpu (kernel 2.4 & kernel 2.6) - see FAQ: http://www.parisc-linux.org/faq/index.html and http://article.gmane.org/gmane.linux.ports.parisc/278/match=use+lower+nice+level+ksoftirqd+hil+enabled

Latest revision as of 08:55, 25 September 2022

Contents

[edit] PA-RISC Linux TODO

[edit] Status & TODO 2022-09-25

  • Kernel: still missing Linux kernel development (no patches available yet or maybe not possible to implement):
    • maybe: optimize flush_dcache_page() implementation like sparc. See Documentation/cachetlb.txt, e.g. used in aio subsystem
    • maybe implement transparent huge pages (due to cache coherency technically only possible on PA8500-PA8700 CPUs, not possible on PA8800-PA8900 CPUs)
    • implement BUG() and WARN() with inline assembly so that interrupt happens in delay branch of "or,<> %r0,cond,%r0". Probably not possible, because gcc will report "control reaches end of non-void function" warnings/errors.
    • disable FP-register save/restore at kernel entry? - https://patchwork.kernel.org/patch/3975291/
    • enable 16k/64k kernel page sizes (still cacheflushing-issues with SCSI driver, additional work in glibc needed to deal with >4k page size, e.g. ld-loader alignments of data/code segments)
    • Superdome support - can someone test? Should work better now with latest kernels (maybe ask Dennis Clarke <dclarke@blastwave.org>, Jan 2019).
  • Debian packages / Userspace work
    • teach "blkid" about palo partition
    • glibc: add backtrace() function, problems when building elfutils package: http://buildd.debian-ports.org/status/package.php?p=elfutils&suite=sid
    • Circular dependency problems with kde packages caused by vlc and ffmpeg (Dave)
      • Solution: Rebuild ffmpeg outside the buildd (as some dependencies have probably been deleted) and upload a +b1 version. Then trigger bin-nmu of phonon package. Finally this resolves then the dependencies of vlc, ffmpeg, phonon, chromaprint, polkit-kde-agent-1, kwrited, kwallet-kf5 and libkf5notifications-dev...
    • Due to very bad performance running multiple copies of dot program (Dave)
      • In vtk6 debian package, adding DOT_NUM_THREADS = 1 helps.
  • Floating point NaN (see: https://en.wikipedia.org/wiki/NaN)
    • PA-RISC uses "mips" NaN format which differs from x86, etc. It should be called PA-RISC format as I think PA was first. The quiet NaN bit is opposite to than in current IEEE standard.
    • Debian packages with NaN issues: libime, capnproto
  • palo (PA-RISC Boot Loader):
    • PALO - add regular rewind & load to avoid tftp boot timing issues. See mail from Frank Schreiner "PALO issues" (Dec 2018).
    • When listing directory contents, resolve and print symlink target file names too, e.g. "vmlinux -> linux-5.12.1-64bit".
    • Fix palo deb package to build iplboot natively (https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=851792)
    • Modify (if possible), that palo can read (sequential) tftpbootable-vmlinuxes as well as the current boot-vmlinux images (simplifies build/handling)

[edit] Upstream PA-RISC-related kernel patch history


[edit] Debian kernel and userspace programs

Debian kernel / Generic Kernel bugs fixed

    • DONE: Fixed 64bit SMP kernel & sticon on machines with more than 4GB RAM (Kernel 3.12)
    • DONE: Lots of syscall fixes regarding compat kernel
    • DONE: send patches to remove UP from debian kernels, use sil680 instead of siimage, see http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=721191 -> fixed in 3.12 / 3.13
    • DONE: Enable BMC in c8000 default kernel config - ipmi driver (CONFIG_IPMI_HANDLER=y) - http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=747482
    • DONE: remove HIL RTC from debian kernel - it creates a backtrace at boot because we have already another rtc0 active.
    • DONE: add ppdev driver, needed by CUPS, systemd reports missing module load (3.17 & 3.16 kernel)
    • DONE: Add crc-modules, event, isofs, jfs, mouse, sata, sound, squashfs, udf, uinput, scsi-common, scsi-extra, loop, serial and usb-serial debian-installer packages
    • DONE: Kernel build problem: a) disable -mfast-indirect-calls in Makefile, b) gcc compiler bug in > gcc-4.8.3-3
    • DONE: Drop HPUX-support from kernel (Kernel 4.0)
    • DONE: implemented HUGE pages
    • DONE: kernel timerfd_settime/timerfd_gettime issue, test with debian package: liblinux-fd-perl -> https://patchwork.kernel.org/patch/7951661/, backported to all kernels
    • DONE: kernel ptrace bug: http://thread.gmane.org/gmane.linux.ports.parisc/26273, possible fix: https://patchwork.kernel.org/patch/8063301/
    • DONE: Implement CONFIG_DEBUG_STACK_USAGE, in kernel 4.6
    • DONE: Use 32bit exception table entries, in kernel 4.6
    • DONE: implemented seccomp syscal, including SECCOMP_MODE_STRICT and mode 2
    • DONE: Fixed FTRACE support (http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=366dd4ea9d5f0eb78fdf4982d76506f99480ec0a)
    • DONE: Add syscall ftrace support
    • DONE: Simplify get_user()/put_user() with regard to %sr0/%sr2 usage.
    • DONE: Add tracehook support (needed for seccomp testcases, gdb, ...)
    • DONE: Added high-resolution sched_clock clocksources in 4.7, needed for debian packages: ismrmrd, haskell-http-conduit, ...
    • DONE: Detect physically broken memory via Page Deallocation Table (PDT), initial support in kernel 4.13
    • DONE: Make kernel self-decompressing (instead of palo reading gzipped kernels)
    • DONE: fix %pF and %pS usage in all kernel code
    • DONE: Enabled BMC/IPMI including Remote power on/off on C8000 and rp3410 machines (kernel 4.17 and above)
    • DONE: use CONFIG_COMPAT_BINFMT_ELF and get rid of arch/parisc/kernel/binfmt_elf32.c
    • DONE: Fix kernel writing core file, gdb reporting: BFD: Warning: /tmp/core.http.1655.ls3011.1465554447 is truncated: expected core file size >= 2187264, found: 2121728.
    • DONE: Find way to extract vmlinux out of vmlinuz (Kernel 4.19)
    • DONE: Implement alternative coding for UP & SMP, one debian kernel for UP and SMP, optimizations to avoid cache flushes on cache-less systems and other qemu-related speed-ups to avoid unnecessary syncronization (Kernel 4.20)
    • DONE: IRQ Balancing was broken, http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f73493eb4aecdd6edd8a749890e6e2dcfa0a7978
    • DONE: Added kgdb and kprobes in kernel 5.2, by Sven Schnelle
    • DONE: report on C8000 one socket with 2 cores
    • DONE: Check Kernel boot code if RAM of machine is big enough (e.g. is booting on 710 machine with 60MB possible?) - https://patchwork.kernel.org/patch/10888283/
    • DONE: convert to SPARSEMEM, instead of DISCONTIGMEM
    • DONE: (NOT POSSIBLE:) Enable huge pages on kernel text for C8000 as well - not possible, will crash due to required equivalent aliasing of caches.
    • DONE: Enable __ro_after_init
    • DONE: add dynamic ftrace support - provided by Sven in kernel 5.3
    • DONE: Fix fallouts from strace: http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b7dc5a071ddf69c0350396b203cba32fe5bab510,
    • DONE: implement kexec syscall
    • DONE: Analyze futex hang (CPU soft lockup) situation with test-lock testcase in the libprelude debian package - fixed by parisc: Add atomic64_set_release() define to avoid CPU soft lockups
    • DONE: Add TOC handler, sending TOC via IPMI interface "toc s"
    • DONE: autofs/automounter is broken, patch sent to list, https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=892953
    • DONE: Try enabling DEBUG_VM_PGTABLE in kernel
    • DONE: SLAB breaks, SLUB works (works in kernel v5.17)
    • DONE: implement .con_font_set (consw) in sticon.c to be able to change fonts at runtime (since v5.10)
    • DONE: Implement kernel VDSO support - Randolphs patch

[edit] ABI breakages (e.g. dropped HP-UX support)

[edit] Considerations between Debian unstable and Debian Jessie release

Jessie was not stable on SMP machines, particularly those with PA8800/PA8900 processors. It's recommended to use kernel 4.4.15 or later. The current default gcc for unstable is gcc 5.4. Most hppa fixes have been back ported to 4.9 but not all. It shouldn't hurt to use binutils from unstable. Debian glibc 2.23 is best. Most old packages should still work although there maybe inequivalent aliasing issues which are relevant on PA8800. There's also a nasty issue with gmon_start being in every shared library in Jessie. This caused a few headaches and potentially breaks applications when it's removed from a library. If you stick with the glibc in Jessie, multithreaded applications may not work as well as they could, but maybe that's not important. The kernel update is the most important one. Since hppa moved to ports, there has been a huge number of bug fixes. System stability is dramatically improved and I believe more packages are available than ever before. It's better to run unstable and just be selective about running "apt-get upgrade". (by Dave Anglin)

[edit] parisc-linux.org Homepage and Debian build server infrastructure work

[edit] Linus Torvalds barking at parisc

[edit] Testsuites, kernel and userspace testing tools

[edit] TODO Drivers

  • write Lasi floppy driver
  • write Suckyio floppy driver
  • write spifi driver (rbrad)
  • modify ncr53c8xx driver for Outfield (735 & 755)
  • write GSC FDDI driver
  • write Timi ASIC (74x) support
  • EISA DMA support

[edit] Review all the todo entries below!

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