Provide kernel_fpu_begin()/kernel_fpu_end() to allow the kernel itself
to use fpu. They can be used by some other kernel components, e.g., the
AMDGPU graphic driver for DCN.
Reported-by: WANG Xuerui <kernel@xen0n.name>
Tested-by: WANG Xuerui <kernel@xen0n.name>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

SEGV_BNDERR was introduced initially for supporting the Intel MPX, but
fell into disuse after the MPX support was removed. The LoongArch
bounds-checking instructions behave very differently than MPX, but
overall the interface is still kind of suitable for conveying the
information to userland when bounds-checking assertions trigger, so we
wouldn't have to invent more UAPI. Specifically, when the BCE triggers,
a SEGV_BNDERR is sent to userland, with si_addr set to the out-of-bounds
address or value (in asrt{gt,le}'s case), and one of si_lower or
si_upper set to the configured bound depending on the faulting
instruction. The other bound is set to either 0 or ULONG_MAX to resemble
a range with both lower and upper bounds.

Note that it is possible to have si_addr == si_lower in case of a
failing asrtgt or {ld,st}gt, because those instructions test for strict
greater-than relationship. This should not pose a problem for userland,
though, because the faulting PC is available for the application to
associate back to the exact instruction for figuring out the
expectation.

Example exception context generated by a faulting `asrtgt.d t0, t1`
(assert t0 > t1 or BCE) with t0=100 and t1=200:

> pc 00005555558206a4 ra 00007ffff2d854fc tp 00007ffff2f2f180 sp 00007ffffbf9fb80
> a0 0000000000000002 a1 00007ffffbf9fce8 a2 00007ffffbf9fd00 a3 00007ffff2ed4558
> a4 0000000000000000 a5 00007ffff2f044c8 a6 00007ffffbf9fce0 a7 fffffffffffff000
> t0 0000000000000064 t1 00000000000000c8 t2 00007ffffbfa2d5e t3 00007ffff2f12aa0
> t4 00007ffff2ed6158 t5 00007ffff2ed6158 t6 000000000000002e t7 0000000003d8f538
> t8 0000000000000005 u0 0000000000000000 s9 0000000000000000 s0 00007ffffbf9fce8
> s1 0000000000000002 s2 0000000000000000 s3 00007ffff2f2c038 s4 0000555555820610
> s5 00007ffff2ed5000 s6 0000555555827e38 s7 00007ffffbf9fd00 s8 0000555555827e38
>    ra: 00007ffff2d854fc
>   ERA: 00005555558206a4
>  CRMD: 000000b0 (PLV0 -IE -DA +PG DACF=CC DACM=CC -WE)
>  PRMD: 00000007 (PPLV3 +PIE -PWE)
>  EUEN: 00000000 (-FPE -SXE -ASXE -BTE)
>  ECFG: 0007181c (LIE=2-4,11-12 VS=7)
> ESTAT: 000a0000 [BCE] (IS= ECode=10 EsubCode=0)
>  PRID: 0014c010 (Loongson-64bit, Loongson-3A5000)
Signed-off-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

Use ISA manual names for BADV and CPUCFG.PRID lines in show_regs(), for
stylistic consistency with the other lines already touched.

While at it, also include current CPU's full name in show_regs() output.
It may be more helpful for developers looking at the resulting dumps,
because multiple distinct CPU models may share the same PRID. Not having
this info available may hide problems only found on some but not all of
the models sharing one specific PRID.
Signed-off-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

Example output looks like:

[   xx.xxxxxx] ESTAT: 00001000 [INT] (IS=12 ECode=0 EsubCode=0)
Signed-off-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

Example output looks like:

[   xx.xxxxxx]  ECFG: 00071c1c (LIE=2-4,10-12 VS=7)
Signed-off-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

Example output looks like:

[   xx.xxxxxx]  EUEN: 00000000 (-FPE -SXE -ASXE -BTE)
Signed-off-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

Example output looks like:

[   xx.xxxxxx]  PRMD: 00000004 (PPLV0 +PIE -PWE)
Signed-off-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

Example output looks like:

[   xx.xxxxxx]  CRMD: 000000b0 (PLV0 -IE -DA +PG DACF=CC DACM=CC -WE)

Some initial machinery for this pretty-printing format has been included
in this patch as well.
Signed-off-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

Use uppercase CSR names throughout for consistency with the manual
wording, and right-align the keys. The "CSR" part is inferrable from
context, hence dropped for more horizontal space.
Signed-off-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

Otherwise the addresses wouldn't make sense at all.

While at it, align the "map keys" to maintain right-alignment with the
"estat:" line too; also swap the ERA and ra lines so all CSRs are shown
together.
Signed-off-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

Show PC (CSR.ERA) in place of $zero, and also show the syscall restart
flag (conveniently stuffed in regs[0]) if non-zero.
Signed-off-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

Define them according to the ISA manual, in order to enable matching the
sub-exceptions for humanization purposes later.
Signed-off-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

While interrupts are assigned ECodes `64 + interrupt number`, all
existing use sites of interrupt numbers want the 64 subtracted.
Re-arrange the definitions so that the actual interrupt number is used
everywhere, and make EXCCODE_INT_END inclusive as it is more intuitive
that way.

While at it, according to the asm/loongarch.h definitions, the total
number of architectural interrupts should be 14, but various other
places indicate otherwise (13 or 15). Those places have been adjusted
to 14 as well for consistency.
Signed-off-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

LoongArch architecture changes for 6.4 depend on the irq changes
to work on "dual-bridge" systems, so merge them to create a base.

We started disabling '-Warray-bounds' for gcc-12 originally on s390,
because it resulted in some warnings that weren't realistically fixable
(commit 8b202ee2: "s390: disable -Warray-bounds").

That s390-specific issue was then found to be less common elsewhere, but
generic (see f0be87c4: "gcc-12: disable '-Warray-bounds' universally
for now"), and then later expanded the version check was expanded to
gcc-11 (5a41237a: "gcc: disable -Warray-bounds for gcc-11 too").

And it turns out that I was much too optimistic in thinking that it's
all going to go away, and here we are with gcc-13 showing all the same
issues.  So instead of expanding this one version at a time, let's just
disable it for gcc-11+, and put an end limit to it only when we actually
find a solution.

Yes, I'm sure some of this is because the kernel just does odd things
(like our "container_of()" use, but also knowingly playing games with
things like linker tables and array layouts).

And yes, some of the warnings are likely signs of real bugs, but when
there are hundreds of false positives, that doesn't really help.

Oh well.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Merge tag 'kbuild-fixes-v6.3-4' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild fixes from Masahiro Yamada:

 - Fix the prefix in the kernel source tarball

 - Fix a typo in the copyright file in Debian package

* tag 'kbuild-fixes-v6.3-4' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
  kbuild: use proper prefix for tarballs to fix rpm-pkg build error
  kbuild: deb-pkg: Fix a spell typo in mkdebian script

Pull irq fix from Borislav Petkov:

 - Remove an over-zealous sanity check of the array of MSI-X vectors to
   be allocated for a device

* tag 'irq_urgent_for_v6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  PCI/MSI: Remove over-zealous hardware size check in pci_msix_validate_entries()

Pull x86 fix from Borislav Petkov

 - Fix for older binutils which do not support C-syntax constant
   suffixes

* tag 'x86_urgent_for_v6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/alternatives: Do not use integer constant suffixes in inline asm

Pull input fixes from Dmitry Torokhov:

 - a check in pegasus-notetaker driver to validate the type of pipe when
   probing a new device

 - a fix for Cypress touch controller to correctly parse maximum number
   of touches.

* tag 'input-for-v6.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: cyttsp5 - fix sensing configuration data structure
  Input: pegasus-notetaker - check pipe type when probing

Since commit f8d94c4e ("kbuild: do not create intermediate *.tar
for source tarballs"), 'make rpm-pkg' fails because the prefix of the
source tarball is 'linux.tar/' instead of 'linux/'. $(basename $@)
strips only '.gz' from the filename linux.tar.gz.

You need to strip two suffixes from compressed tarballs and one suffix
from uncompressed tarballs (for example 'perf-6.3.0.tar' generated by
'make perf-tar-src-pkg').

One tricky fix might be --prefix=$(firstword $(subst .tar, ,$@))/
but I think it is better to hard-code the prefix.

Fixes: f8d94c4e ("kbuild: do not create intermediate *.tar for source tarballs")
Reported-by: Jiwei Sun <sunjw10@lenovo.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>

Signed-off-by: Woody Suwalski <terraluna977@gmail.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

Pull MIPS fix from Thomas Bogendoerfer:
 "Fix for link errors"

* tag 'mips-fixes_6.3_2' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux:
  MIPS: Define RUNTIME_DISCARD_EXIT in LD script

Pull kvm fixes from Paolo Bonzini:
 "Two serious ARM fixes:

   - Plug a buffer overflow due to the use of the user-provided register
     width for firmware regs. Outright reject accesses where the user
     register width does not match the kernel representation.

   - Protect non-atomic RMW operations on vCPU flags against preemption,
     as an update to the flags by an intervening preemption could be
     lost"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: arm64: Fix buffer overflow in kvm_arm_set_fw_reg()
  KVM: arm64: Make vcpu flag updates non-preemptible

Pull cifs fixes from Steve French:
 "Three small smb3 client fixes:

   - two important fixes for unbuffered read regression with the
     iov_iter changes (e.g. read soon after mount in some multichannel
     scenarios)

   - DFS prefix path fix (also for stable)"

* tag '6.3-rc7-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: Reapply lost fix from commit 30b2b219
  cifs: Fix unbuffered read
  cifs: avoid dup prefix path in dfs_get_automount_devname()

Merge tag 'kvmarm-fixes-6.3-4' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD

KVM/arm64 fixes for 6.3, part #4

 - Plug a buffer overflow due to the use of the user-provided register
   width for firmware regs. Outright reject accesses where the
   user register width does not match the kernel representation.

 - Protect non-atomic RMW operations on vCPU flags against preemption,
   as an update to the flags by an intervening preemption could be lost.

MIPS's exit sections are discarded at runtime as well.

Fixes link error:
`.exit.text' referenced in section `__jump_table' of fs/fuse/inode.o:
defined in discarded section `.exit.text' of fs/fuse/inode.o

Fixes: 99cb0d91 ("arch: fix broken BuildID for arm64 and riscv")
Reported-by: "kernelci.org bot" <bot@kernelci.org>
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

This reverts commit 5c62d5aa.

This broke wake-on-lan for multiple people, and for much too long.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=217069
Link: https://lore.kernel.org/all/754225a2-95a9-2c36-1886-7da1a78308c2@loongson.cn/
Link: https://github.com/acpica/acpica/pull/866
Cc: Rafael J. Wysocki <rafael@kernel.org>
Cc: Jianmin Lv <lvjianmin@loongson.cn>
Cc: Huacai Chen <chenhuacai@loongson.cn>
Cc: Bob Moore <robert.moore@intel.com>
Cc: stable@kernel.org # 6.2
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull btrfs fixes from David Sterba:
 "Two patches fixing the problem with aync discard.

  The default settings had a low IOPS limit and processing a large batch
  to discard would take a long time. On laptops this can cause increased
  power consumption due to disk activity.

  As async discard has been on by default since 6.2 this likely affects
  a lot of users.

  Summary:

   - increase the default IOPS limit 10x which reportedly helped

   - setting the sysfs IOPS value to 0 now does not throttle anymore
     allowing the discards to be processed at full speed. Previously
     there was an arbitrary 6 hour target for processing the pending
     batch"

* tag 'for-6.3-rc7-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  btrfs: reinterpret async discard iops_limit=0 as no delay
  btrfs: set default discard iops_limit to 1000

Pull block fix from Jens Axboe:
 "Just a single revert of a patch from the 6.3 series"

* tag 'block-6.3-2023-04-21' of git://git.kernel.dk/linux:
  Revert "block: Merge bio before checking ->cached_rq"

Pull char/misc driver fixes from Greg KH:
 "Here are some last-minute tiny driver fixes for 6.3-final. They
  include fixes for some fpga and iio drivers:

   - fpga bridge driver fix

   - fpga dfl error reporting fix

   - fpga m10bmc driver fix

   - fpga xilinx driver fix

   - iio light driver fix

   - iio dac fwhandle leak fix

   - iio adc driver fix

  All of these have been in linux-next for a few weeks with no reported
  problems"

* tag 'char-misc-6.3-final' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  iio: light: tsl2772: fix reading proximity-diodes from device tree
  fpga: bridge: properly initialize bridge device before populating children
  iio: dac: ad5755: Add missing fwnode_handle_put()
  iio: adc: at91-sama5d2_adc: fix an error code in at91_adc_allocate_trigger()
  fpga: xilinx-pr-decoupler: Use readl wrapper instead of pure readl
  fpga: dfl-pci: Drop redundant pci_enable_pcie_error_reporting()
  fpga: m10bmc-sec: Fix rsu_send_data() to return FW_UPLOAD_ERR_HW_ERROR

Pull gpio fixes from Bartosz Golaszewski:

 - use raw_spinlocks in regmaps that are used in interrupt context in
   gpio-104-idi-48 and gpio-104-dio-48e

* tag 'gpio-fixes-for-v6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux:
  gpio: 104-idi-48: Enable use_raw_spinlock for idi48_regmap_config
  gpio: 104-dio-48e: Enable use_raw_spinlock for dio48e_regmap_config

Pull sound fixes from Takashi Iwai:
 "Just a few fixes: all small and device-specific (ASoC FSL, SOF, and
  HD-audio quirks), should be safe to apply at the last minute"

* tag 'sound-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hda/realtek: fix mute/micmute LEDs for a HP ProBook
  ASoC: fsl_asrc_dma: fix potential null-ptr-deref
  ASoC: fsl_sai: Fix pins setting for i.MX8QM platform
  ALSA: hda/realtek: Remove specific patch for Dell Precision 3260
  ASoC: max98373: change power down sequence for smart amp
  ASoC: SOF: pm: Tear down pipelines only if DSP was active
  ASoC: SOF: ipc4-topology: Clarify bind failure caused by missing fw_module

It seems there is a misprint in the check of strdup() return code that
can lead to NULL pointer dereference.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: 4520c6a4 ("X.509: Add simple ASN.1 grammar compiler")
Signed-off-by: Ekaterina Orlova <vorobushek.ok@gmail.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: James Bottomley <jejb@linux.ibm.com>
Cc: Jarkko Sakkinen <jarkko@kernel.org>
Cc: keyrings@vger.kernel.org
Cc: linux-kbuild@vger.kernel.org
Link: https://lore.kernel.org/r/20230315172130.140-1-vorobushek.ok@gmail.com/Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull drm fixes from Dave Airlie:
 "This is the regular and hopefully last round of fixes for 6.3.

  Pretty small, a few amdgpu, one i915, one nouveau, one rockchip and
  one gpu scheduler fix:

  nouveau:
   - fix dma-resv timeout

  rockchip:
   - fix suspend/resume

  sched:
   - fix timeout handling

  i915:
   - Fix fast wake AUX sync len

  amdgpu:
   - GPU reset fix
   - DCN 3.1.5 line buffer fix
   - Display fix for single channel memory configs
   - Fix a possible divide by 0"

* tag 'drm-fixes-2023-04-21' of git://anongit.freedesktop.org/drm/drm:
  drm/amd/display: fix a divided-by-zero error
  drm/amd/display: limit timing for single dimm memory
  drm/amd/display: set dcn315 lb bpp to 48
  drm/amdgpu: Fix desktop freezed after gpu-reset
  drm/rockchip: vop2: Use regcache_sync() to fix suspend/resume
  drm/nouveau: fix incorrect conversion to dma_resv_wait_timeout()
  drm/rockchip: vop2: fix suspend/resume
  drm/i915: Fix fast wake AUX sync len
  drm/sched: Check scheduler ready before calling timeout handling

Merge tag 'amd-drm-fixes-6.3-2023-04-19' of https://gitlab.freedesktop.org/agd5f/linux into drm-fixes

amd-drm-fixes-6.3-2023-04-19:

amdgpu:
- GPU reset fix
- DCN 3.1.5 line buffer fix
- Display fix for single channel memory configs
- Fix a possible divide by 0
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230420031717.7790-1-alexander.deucher@amd.com

Merge tag 'drm-intel-fixes-2023-04-19' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes

drm/i915 fixes for v6.3 final:
- Fix fast wake AUX sync len
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/87354w1b76.fsf@intel.com

Merge tag 'drm-misc-fixes-2023-04-20-2' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes

Short summary of fixes pull:

 * nouveau: fix dma-resv timeout
 * rockchip: fix suspend/resume
 * sched: fix timeout handling
Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20230420083114.GA17651@linux-uq9g

Pull pci fix from Bjorn Helgaas:

 - Previously we ignored PCI devices if the DT "status" property or the
   ACPI _STA method said it was not present.

   Per spec, _STA cannot be used for that purpose, and using it that way
   caused regressions, so skip the _STA check (Rob Herring)

* tag 'pci-v6.3-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci:
  PCI: Restrict device disabled status check to DT

Currently, a limit of 0 results in a hard coded metering over 6 hours.
Since the default is a set limit, I suspect no one truly depends on this
rather arbitrary setting. Repurpose it for an arguably more useful
"unlimited" mode, where the delay is 0.

Note that if block groups are too new, or go fully empty, there is still
a delay associated with those conditions. Those delays implement
heuristics for not trimming a region we are relatively likely to fully
overwrite soon.

CC: stable@vger.kernel.org # 6.2+
Reviewed-by: Neal Gompa <neal@gompa.dev>
Signed-off-by: Boris Burkov <boris@bur.io>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>