When lockdep is enabled, the for_each_sibling_event(sibling, event)
macro checks that event->ctx->mutex is held. When creating a new group
leader event, we call perf_event_validate_size() on a partially
initialized event where event->ctx is NULL, and so when
for_each_sibling_event() attempts to check event->ctx->mutex, we get a
splat, as reported by Lucas De Marchi:

  WARNING: CPU: 8 PID: 1471 at kernel/events/core.c:1950 __do_sys_perf_event_open+0xf37/0x1080

This only happens for a new event which is its own group_leader, and in
this case there cannot be any sibling events. Thus it's safe to skip the
check for siblings, which avoids having to make invasive and ugly
changes to for_each_sibling_event().

Avoid the splat by bailing out early when the new event is its own
group_leader.

Fixes: 382c27f4 ("perf: Fix perf_event_validate_size()")
Closes: https://lore.kernel.org/lkml/20231214000620.3081018-1-lucas.demarchi@intel.com/
Closes: https://lore.kernel.org/lkml/ZXpm6gQ%2Fd59jGsuW@xpf.sh.intel.com/Reported-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reported-by: Pengfei Xu <pengfei.xu@intel.com>
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20231215112450.3972309-1-mark.rutland@arm.com

Pull scheduler fix from Borislav Petkov:

 - Make sure tasks are thawed exactly and only once to avoid their state
   getting corrupted

* tag 'sched_urgent_for_v6.7_rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  freezer,sched: Do not restore saved_state of a thawed task

Pull perf event fix from Borislav Petkov:

 - Make sure perf event size validation is done on every event in the
   group

* tag 'perf_urgent_for_v6.7_rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf: Fix perf_event_validate_size()

Pull x86 fixes from Borislav Petkov:

 - Add a forgotten CPU vendor check in the AMD microcode post-loading
   callback so that the callback runs only on AMD

 - Make sure SEV-ES protocol negotiation happens only once and on the
   BSP

* tag 'x86_urgent_for_v6.7_rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/CPU/AMD: Check vendor in the AMD microcode callback
  x86/sev: Fix kernel crash due to late update to read-only ghcb_version

Pull kvm fixes from Paolo Bonzini:
 "Generic:

   - Set .owner for various KVM file_operations so that files refcount
     the KVM module until KVM is done executing _all_ code, including
     the last few instructions of kvm_put_kvm(). And then revert the
     misguided attempt to rely on "struct kvm" refcounts to pin
     KVM-the-module.

  ARM:

   - Do not redo the mapping of vLPIs, if they have already been mapped

  s390:

   - Do not leave bits behind in PTEs

   - Properly catch page invalidations that affect the prefix of a
     nested guest

  x86:

   - When checking if a _running_ vCPU is "in-kernel", i.e. running at
     CPL0, get the CPL directly instead of relying on
     preempted_in_kernel (which is valid if and only if the vCPU was
     preempted, i.e. NOT running).

   - Fix a benign "return void" that was recently introduced.

  Selftests:

   - Makefile tweak for dependency generation

   - '-Wformat' fix"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: SVM: Update EFER software model on CR0 trap for SEV-ES
  KVM: selftests: add -MP to CFLAGS
  KVM: selftests: Actually print out magic token in NX hugepages skip message
  KVM: x86: Remove 'return void' expression for 'void function'
  Revert "KVM: Prevent module exit until all VMs are freed"
  KVM: Set file_operations.owner appropriately for all such structures
  KVM: x86: Get CPL directly when checking if loaded vCPU is in kernel mode
  KVM: arm64: GICv4: Do not perform a map to a mapped vLPI
  KVM: s390/mm: Properly reset no-dat
  KVM: s390: vsie: fix wrong VIR 37 when MSO is used

Pull powerpc fix from Michael Ellerman:

 - Fix stack teardown in ftrace_no_trace, seen as crashes doing CPU
   hotplug while ftrace is active.

   Thanks to Naveen N Rao.

* tag 'powerpc-6.7-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/ftrace: Fix stack teardown in ftrace_no_trace

Pull gpio fix from Bartosz Golaszewski:

 - fix an error path after a failed export in sysfs code

* tag 'gpio-fixes-for-v6.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux:
  gpiolib: sysfs: Fix error handling on failed export

Pull USB fixes from Greg KH:
 "Here are some small USB fixes for 6.7-rc5 to resolve some reported
  issues. Included in here are:

   - usb gadget f_hid, and uevent fix

   - xhci driver revert to resolve a much-reported issue

   - typec driver fix

  All of these have been in linux-next with no reported issues"

* tag 'usb-6.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  usb: gadget: f_hid: fix report descriptor allocation
  Revert "xhci: Loosen RPM as default policy to cover for AMD xHC 1.1"
  usb: typec: class: fix typec_altmode_put_partner to put plugs
  USB: gadget: core: adjust uevent timing on gadget unbind

Pull serial driver fixes from Greg KH:
 "Here are some small serial driver fixes for 6.7-rc4 to resolve some
  reported issues. Included in here are:

   - pl011 dma support fix

   - sc16is7xx driver fix

   - ma35d1 console index fix

   - 8250 driver fixes for small issues

  All of these have been in linux-next with no reported issues"

* tag 'tty-6.7-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  serial: 8250_dw: Add ACPI ID for Granite Rapids-D UART
  serial: ma35d1: Validate console index before assignment
  ARM: PL011: Fix DMA support
  serial: sc16is7xx: address RX timeout interrupt errata
  serial: 8250: 8250_omap: Clear UART_HAS_RHR_IT_DIS bit
  serial: 8250_omap: Add earlycon support for the AM654 UART controller
  serial: 8250: 8250_omap: Do not start RX DMA on THRI interrupt

Pull char / misc driver fixes from Greg KH:
 "Here are some small fixes for 6.7-rc5 for a variety of small driver
  subsystems. Included in here are:

   - debugfs revert for reported issue

   - greybus revert for reported issue

   - greybus fixup for endian build warning

   - coresight driver fixes

   - nvmem driver fixes

   - devcoredump fix

   - parport new device id

   - ndtest build fix

  All of these have ben in linux-next with no reported issues"

* tag 'char-misc-6.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  nvmem: Do not expect fixed layouts to grab a layout driver
  parport: Add support for Brainboxes IX/UC/PX parallel cards
  Revert "greybus: gb-beagleplay: Ensure le for values in transport"
  greybus: gb-beagleplay: Ensure le for values in transport
  greybus: BeaglePlay driver needs CRC_CCITT
  Revert "debugfs: annotate debugfs handlers vs. removal with lockdep"
  devcoredump: Send uevent once devcd is ready
  ndtest: fix typo class_regster -> class_register
  misc: mei: client.c: fix problem of return '-EOVERFLOW' in mei_cl_write
  misc: mei: client.c: return negative error code in mei_cl_write
  mei: pxp: fix mei_pxp_send_message return value
  coresight: ultrasoc-smb: Fix uninitialized before use buf_hw_base
  coresight: ultrasoc-smb: Config SMB buffer before register sink
  coresight: ultrasoc-smb: Fix sleep while close preempt in enable_smb
  Documentation: coresight: fix `make refcheckdocs` warning
  hwtracing: hisi_ptt: Don't try to attach a task
  hwtracing: hisi_ptt: Handle the interrupt in hardirq context
  hwtracing: hisi_ptt: Add dummy callback pmu::read()
  coresight: Fix crash when Perf and sysfs modes are used concurrently
  coresight: etm4x: Remove bogous __exit annotation for some functions

Merge tag 'loongarch-fixes-6.7-2' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson

Pull LoongArch fixes from Huacai Chen:
 "Preserve syscall nr across execve(), slightly clean up drdtime(), fix
  the Clang built zboot kernel, fix a stack unwinder bug and several bpf
  jit bugs"

* tag 'loongarch-fixes-6.7-2' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson:
  LoongArch: BPF: Fix unconditional bswap instructions
  LoongArch: BPF: Fix sign-extension mov instructions
  LoongArch: BPF: Don't sign extend function return value
  LoongArch: BPF: Don't sign extend memory load operand
  LoongArch: Preserve syscall nr across execve()
  LoongArch: Set unwind stack type to unknown rather than set error flag
  LoongArch: Slightly clean up drdtime()
  LoongArch: Apply dynamic relocations for LLD

Pull MIPS fixes from Thomas Bogendoerfer:

 - Fixes for broken Loongson firmware

 - Fix lockdep splat

 - Fix FPU states when creating kernel threads

* tag 'mips-fixes_6.7_1' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux:
  MIPS: kernel: Clear FPU states when setting up kernel threads
  MIPS: Loongson64: Handle more memory types passed from firmware
  MIPS: Loongson64: Enable DMA noncoherent support
  MIPS: Loongson64: Reserve vgabios memory on boot
  mips/smp: Call rcutree_report_cpu_starting() earlier

Merge tag 'perf-tools-fixes-for-v6.7-2-2023-12-08' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools

Pull perf tools fixes from Namhyung Kim:
 "A random set of small bug fixes including:

   - Fix segfault on AmpereOne due to missing default metricgroup name

   - Fix segfault on `perf list --json` due to NULL pointer"

* tag 'perf-tools-fixes-for-v6.7-2-2023-12-08' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools:
  perf list: Fix JSON segfault by setting the used skip_duplicate_pmus callback
  perf vendor events arm64: AmpereOne: Add missing DefaultMetricgroupName fields
  perf metrics: Avoid segv if default metricgroup isn't set

Pull smb client fixes from Steve French:
 "Six smb3 client fixes:

   - Fixes for copy_file_range and clone (cache invalidation and file
     size), also addresses an xfstest failure

   - Fix to return proper error if REMAP_FILE_DEDUP set (also fixes
     xfstest generic/304)

   - Fix potential null pointer reference with DFS

   - Multichannel fix addressing (reverting an earlier patch) some of
     the problems with enabling/disabling channels dynamically

  Still working on a followon multichannel fix to address another issue
  found in reconnect testing that will send next week"

* tag '6.7-rc4-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: reconnect worker should take reference on server struct unconditionally
  Revert "cifs: reconnect work should have reference on server struct"
  cifs: Fix non-availability of dedup breaking generic/304
  smb: client: fix potential NULL deref in parse_dfs_referrals()
  cifs: Fix flushing, invalidation and file size with FICLONE
  cifs: Fix flushing, invalidation and file size with copy_file_range()

We can see that "bswap32: Takes an unsigned 32-bit number in either big-
or little-endian format and returns the equivalent number with the same
bit width but opposite endianness" in BPF Instruction Set Specification,
so it should clear the upper 32 bits in "case 32:" for both BPF_ALU and
BPF_ALU64.

[root@linux fedora]# echo 1 > /proc/sys/net/core/bpf_jit_enable
[root@linux fedora]# modprobe test_bpf

Before:
test_bpf: #313 BSWAP 32: 0x0123456789abcdef -> 0xefcdab89 jited:1 ret 1460850314 != -271733879 (0x5712ce8a != 0xefcdab89)FAIL (1 times)
test_bpf: #317 BSWAP 32: 0xfedcba9876543210 -> 0x10325476 jited:1 ret -1460850316 != 271733878 (0xa8ed3174 != 0x10325476)FAIL (1 times)

After:
test_bpf: #313 BSWAP 32: 0x0123456789abcdef -> 0xefcdab89 jited:1 4 PASS
test_bpf: #317 BSWAP 32: 0xfedcba9876543210 -> 0x10325476 jited:1 4 PASS

Fixes: 4ebf9216 ("LoongArch: BPF: Support unconditional bswap instructions")
Acked-by: Hengqi Chen <hengqi.chen@gmail.com>
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

We can see that "Short form of movsx, dst_reg = (s8,s16,s32)src_reg" in
include/linux/filter.h, additionally, for BPF_ALU64 the value of the
destination register is unchanged whereas for BPF_ALU the upper 32 bits
of the destination register are zeroed, so it should clear the upper 32
bits for BPF_ALU.

[root@linux fedora]# echo 1 > /proc/sys/net/core/bpf_jit_enable
[root@linux fedora]# modprobe test_bpf

Before:
test_bpf: #81 ALU_MOVSX | BPF_B jited:1 ret 2 != 1 (0x2 != 0x1)FAIL (1 times)
test_bpf: #82 ALU_MOVSX | BPF_H jited:1 ret 2 != 1 (0x2 != 0x1)FAIL (1 times)

After:
test_bpf: #81 ALU_MOVSX | BPF_B jited:1 6 PASS
test_bpf: #82 ALU_MOVSX | BPF_H jited:1 6 PASS

By the way, the bpf selftest case "./test_progs -t verifier_movsx" can
also be fixed with this patch.

Fixes: f48012f1 ("LoongArch: BPF: Support sign-extension mov instructions")
Acked-by: Hengqi Chen <hengqi.chen@gmail.com>
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

The `cls_redirect` test triggers a kernel panic like:

  # ./test_progs -t cls_redirect
  Can't find bpf_testmod.ko kernel module: -2
  WARNING! Selftests relying on bpf_testmod.ko will be skipped.
  [   30.938489] CPU 3 Unable to handle kernel paging request at virtual address fffffffffd814de0, era == ffff800002009fb8, ra == ffff800002009f9c
  [   30.939331] Oops[#1]:
  [   30.939513] CPU: 3 PID: 1260 Comm: test_progs Not tainted 6.7.0-rc2-loong-devel-g2f56bb0d2327 #35 a896aca3f4164f09cc346f89f2e09832e07be5f6
  [   30.939732] Hardware name: QEMU QEMU Virtual Machine, BIOS unknown 2/2/2022
  [   30.939901] pc ffff800002009fb8 ra ffff800002009f9c tp 9000000104da4000 sp 9000000104da7ab0
  [   30.940038] a0 fffffffffd814de0 a1 9000000104da7a68 a2 0000000000000000 a3 9000000104da7c10
  [   30.940183] a4 9000000104da7c14 a5 0000000000000002 a6 0000000000000021 a7 00005555904d7f90
  [   30.940321] t0 0000000000000110 t1 0000000000000000 t2 fffffffffd814de0 t3 0004c4b400000000
  [   30.940456] t4 ffffffffffffffff t5 00000000c3f63600 t6 0000000000000000 t7 0000000000000000
  [   30.940590] t8 000000000006d803 u0 0000000000000020 s9 9000000104da7b10 s0 900000010504c200
  [   30.940727] s1 fffffffffd814de0 s2 900000010504c200 s3 9000000104da7c10 s4 9000000104da7ad0
  [   30.940866] s5 0000000000000000 s6 90000000030e65bc s7 9000000104da7b44 s8 90000000044f6fc0
  [   30.941015]    ra: ffff800002009f9c bpf_prog_846803e5ae81417f_cls_redirect+0xa0/0x590
  [   30.941535]   ERA: ffff800002009fb8 bpf_prog_846803e5ae81417f_cls_redirect+0xbc/0x590
  [   30.941696]  CRMD: 000000b0 (PLV0 -IE -DA +PG DACF=CC DACM=CC -WE)
  [   30.942224]  PRMD: 00000004 (PPLV0 +PIE -PWE)
  [   30.942330]  EUEN: 00000003 (+FPE +SXE -ASXE -BTE)
  [   30.942453]  ECFG: 00071c1c (LIE=2-4,10-12 VS=7)
  [   30.942612] ESTAT: 00010000 [PIL] (IS= ECode=1 EsubCode=0)
  [   30.942764]  BADV: fffffffffd814de0
  [   30.942854]  PRID: 0014c010 (Loongson-64bit, Loongson-3A5000)
  [   30.942974] Modules linked in:
  [   30.943078] Process test_progs (pid: 1260, threadinfo=00000000ce303226, task=000000007d10bb76)
  [   30.943306] Stack : 900000010a064000 90000000044f6fc0 9000000104da7b48 0000000000000000
  [   30.943495]         0000000000000000 9000000104da7c14 9000000104da7c10 900000010504c200
  [   30.943626]         0000000000000001 ffff80001b88c000 9000000104da7b70 90000000030e6668
  [   30.943785]         0000000000000000 9000000104da7b58 ffff80001b88c048 9000000003d05000
  [   30.943936]         900000000303ac88 0000000000000000 0000000000000000 9000000104da7b70
  [   30.944091]         0000000000000000 0000000000000001 0000000731eeab00 0000000000000000
  [   30.944245]         ffff80001b88c000 0000000000000000 0000000000000000 54b99959429f83b8
  [   30.944402]         ffff80001b88c000 90000000044f6fc0 9000000101d70000 ffff80001b88c000
  [   30.944538]         000000000000005a 900000010504c200 900000010a064000 900000010a067000
  [   30.944697]         9000000104da7d88 0000000000000000 9000000003d05000 90000000030e794c
  [   30.944852]         ...
  [   30.944924] Call Trace:
  [   30.945120] [<ffff800002009fb8>] bpf_prog_846803e5ae81417f_cls_redirect+0xbc/0x590
  [   30.945650] [<90000000030e6668>] bpf_test_run+0x1ec/0x2f8
  [   30.945958] [<90000000030e794c>] bpf_prog_test_run_skb+0x31c/0x684
  [   30.946065] [<90000000026d4f68>] __sys_bpf+0x678/0x2724
  [   30.946159] [<90000000026d7288>] sys_bpf+0x20/0x2c
  [   30.946253] [<90000000032dd224>] do_syscall+0x7c/0x94
  [   30.946343] [<9000000002541c5c>] handle_syscall+0xbc/0x158
  [   30.946492]
  [   30.946549] Code: 0015030e  5c0009c0  5001d000 <28c00304> 02c00484  29c00304  00150009  2a42d2e4  0280200d
  [   30.946793]
  [   30.946971] ---[ end trace 0000000000000000 ]---
  [   32.093225] Kernel panic - not syncing: Fatal exception in interrupt
  [   32.093526] Kernel relocated by 0x2320000
  [   32.093630]  .text @ 0x9000000002520000
  [   32.093725]  .data @ 0x9000000003400000
  [   32.093792]  .bss  @ 0x9000000004413200
  [   34.971998] ---[ end Kernel panic - not syncing: Fatal exception in interrupt ]---

This is because we signed-extend function return values. When subprog
mode is enabled, we have:

  cls_redirect()
    -> get_global_metrics() returns pcpu ptr 0xfffffefffc00b480

The pointer returned is later signed-extended to 0xfffffffffc00b480 at
`BPF_JMP | BPF_EXIT`. During BPF prog run, this triggers unhandled page
fault and a kernel panic.

Drop the unnecessary signed-extension on return values like other
architectures do.

With this change, we have:

  # ./test_progs -t cls_redirect
  Can't find bpf_testmod.ko kernel module: -2
  WARNING! Selftests relying on bpf_testmod.ko will be skipped.
  #51/1    cls_redirect/cls_redirect_inlined:OK
  #51/2    cls_redirect/IPv4 TCP accept unknown (no hops, flags: SYN):OK
  #51/3    cls_redirect/IPv6 TCP accept unknown (no hops, flags: SYN):OK
  #51/4    cls_redirect/IPv4 TCP accept unknown (no hops, flags: ACK):OK
  #51/5    cls_redirect/IPv6 TCP accept unknown (no hops, flags: ACK):OK
  #51/6    cls_redirect/IPv4 TCP forward unknown (one hop, flags: ACK):OK
  #51/7    cls_redirect/IPv6 TCP forward unknown (one hop, flags: ACK):OK
  #51/8    cls_redirect/IPv4 TCP accept known (one hop, flags: ACK):OK
  #51/9    cls_redirect/IPv6 TCP accept known (one hop, flags: ACK):OK
  #51/10   cls_redirect/IPv4 UDP accept unknown (no hops, flags: none):OK
  #51/11   cls_redirect/IPv6 UDP accept unknown (no hops, flags: none):OK
  #51/12   cls_redirect/IPv4 UDP forward unknown (one hop, flags: none):OK
  #51/13   cls_redirect/IPv6 UDP forward unknown (one hop, flags: none):OK
  #51/14   cls_redirect/IPv4 UDP accept known (one hop, flags: none):OK
  #51/15   cls_redirect/IPv6 UDP accept known (one hop, flags: none):OK
  #51/16   cls_redirect/cls_redirect_subprogs:OK
  #51/17   cls_redirect/IPv4 TCP accept unknown (no hops, flags: SYN):OK
  #51/18   cls_redirect/IPv6 TCP accept unknown (no hops, flags: SYN):OK
  #51/19   cls_redirect/IPv4 TCP accept unknown (no hops, flags: ACK):OK
  #51/20   cls_redirect/IPv6 TCP accept unknown (no hops, flags: ACK):OK
  #51/21   cls_redirect/IPv4 TCP forward unknown (one hop, flags: ACK):OK
  #51/22   cls_redirect/IPv6 TCP forward unknown (one hop, flags: ACK):OK
  #51/23   cls_redirect/IPv4 TCP accept known (one hop, flags: ACK):OK
  #51/24   cls_redirect/IPv6 TCP accept known (one hop, flags: ACK):OK
  #51/25   cls_redirect/IPv4 UDP accept unknown (no hops, flags: none):OK
  #51/26   cls_redirect/IPv6 UDP accept unknown (no hops, flags: none):OK
  #51/27   cls_redirect/IPv4 UDP forward unknown (one hop, flags: none):OK
  #51/28   cls_redirect/IPv6 UDP forward unknown (one hop, flags: none):OK
  #51/29   cls_redirect/IPv4 UDP accept known (one hop, flags: none):OK
  #51/30   cls_redirect/IPv6 UDP accept known (one hop, flags: none):OK
  #51/31   cls_redirect/cls_redirect_dynptr:OK
  #51/32   cls_redirect/IPv4 TCP accept unknown (no hops, flags: SYN):OK
  #51/33   cls_redirect/IPv6 TCP accept unknown (no hops, flags: SYN):OK
  #51/34   cls_redirect/IPv4 TCP accept unknown (no hops, flags: ACK):OK
  #51/35   cls_redirect/IPv6 TCP accept unknown (no hops, flags: ACK):OK
  #51/36   cls_redirect/IPv4 TCP forward unknown (one hop, flags: ACK):OK
  #51/37   cls_redirect/IPv6 TCP forward unknown (one hop, flags: ACK):OK
  #51/38   cls_redirect/IPv4 TCP accept known (one hop, flags: ACK):OK
  #51/39   cls_redirect/IPv6 TCP accept known (one hop, flags: ACK):OK
  #51/40   cls_redirect/IPv4 UDP accept unknown (no hops, flags: none):OK
  #51/41   cls_redirect/IPv6 UDP accept unknown (no hops, flags: none):OK
  #51/42   cls_redirect/IPv4 UDP forward unknown (one hop, flags: none):OK
  #51/43   cls_redirect/IPv6 UDP forward unknown (one hop, flags: none):OK
  #51/44   cls_redirect/IPv4 UDP accept known (one hop, flags: none):OK
  #51/45   cls_redirect/IPv6 UDP accept known (one hop, flags: none):OK
  #51      cls_redirect:OK
  Summary: 1/45 PASSED, 0 SKIPPED, 0 FAILED

Fixes: 5dc61552 ("LoongArch: Add BPF JIT support")
Signed-off-by: Hengqi Chen <hengqi.chen@gmail.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

The `cgrp_local_storage` test triggers a kernel panic like:

  # ./test_progs -t cgrp_local_storage
  Can't find bpf_testmod.ko kernel module: -2
  WARNING! Selftests relying on bpf_testmod.ko will be skipped.
  [  550.930632] CPU 1 Unable to handle kernel paging request at virtual address 0000000000000080, era == ffff80000200be34, ra == ffff80000200be00
  [  550.931781] Oops[#1]:
  [  550.931966] CPU: 1 PID: 1303 Comm: test_progs Not tainted 6.7.0-rc2-loong-devel-g2f56bb0d2327 #35 a896aca3f4164f09cc346f89f2e09832e07be5f6
  [  550.932215] Hardware name: QEMU QEMU Virtual Machine, BIOS unknown 2/2/2022
  [  550.932403] pc ffff80000200be34 ra ffff80000200be00 tp 9000000108350000 sp 9000000108353dc0
  [  550.932545] a0 0000000000000000 a1 0000000000000517 a2 0000000000000118 a3 00007ffffbb15558
  [  550.932682] a4 00007ffffbb15620 a5 90000001004e7700 a6 0000000000000021 a7 0000000000000118
  [  550.932824] t0 ffff80000200bdc0 t1 0000000000000517 t2 0000000000000517 t3 00007ffff1c06ee0
  [  550.932961] t4 0000555578ae04d0 t5 fffffffffffffff8 t6 0000000000000004 t7 0000000000000020
  [  550.933097] t8 0000000000000040 u0 00000000000007b8 s9 9000000108353e00 s0 90000001004e7700
  [  550.933241] s1 9000000004005000 s2 0000000000000001 s3 0000000000000000 s4 0000555555eb2ec8
  [  550.933379] s5 00007ffffbb15bb8 s6 00007ffff1dafd60 s7 000055555663f610 s8 00007ffff1db0050
  [  550.933520]    ra: ffff80000200be00 bpf_prog_98f1b9e767be2a84_on_enter+0x40/0x200
  [  550.933911]   ERA: ffff80000200be34 bpf_prog_98f1b9e767be2a84_on_enter+0x74/0x200
  [  550.934105]  CRMD: 000000b0 (PLV0 -IE -DA +PG DACF=CC DACM=CC -WE)
  [  550.934596]  PRMD: 00000004 (PPLV0 +PIE -PWE)
  [  550.934712]  EUEN: 00000003 (+FPE +SXE -ASXE -BTE)
  [  550.934836]  ECFG: 00071c1c (LIE=2-4,10-12 VS=7)
  [  550.934976] ESTAT: 00010000 [PIL] (IS= ECode=1 EsubCode=0)
  [  550.935097]  BADV: 0000000000000080
  [  550.935181]  PRID: 0014c010 (Loongson-64bit, Loongson-3A5000)
  [  550.935291] Modules linked in:
  [  550.935391] Process test_progs (pid: 1303, threadinfo=000000006c3b1c41, task=0000000061f84a55)
  [  550.935643] Stack : 00007ffffbb15bb8 0000555555eb2ec8 0000000000000000 0000000000000001
  [  550.935844]         9000000004005000 ffff80001b864000 00007ffffbb15450 90000000029aa034
  [  550.935990]         0000000000000000 9000000108353ec0 0000000000000118 d07d9dfb09721a09
  [  550.936175]         0000000000000001 0000000000000000 9000000108353ec0 0000000000000118
  [  550.936314]         9000000101d46ad0 900000000290abf0 000055555663f610 0000000000000000
  [  550.936479]         0000000000000003 9000000108353ec0 00007ffffbb15450 90000000029d7288
  [  550.936635]         00007ffff1dafd60 000055555663f610 0000000000000000 0000000000000003
  [  550.936779]         9000000108353ec0 90000000035dd1f0 00007ffff1dafd58 9000000002841c5c
  [  550.936939]         0000000000000119 0000555555eea5a8 00007ffff1d78780 00007ffffbb153e0
  [  550.937083]         ffffffffffffffda 00007ffffbb15518 0000000000000040 00007ffffbb15558
  [  550.937224]         ...
  [  550.937299] Call Trace:
  [  550.937521] [<ffff80000200be34>] bpf_prog_98f1b9e767be2a84_on_enter+0x74/0x200
  [  550.937910] [<90000000029aa034>] bpf_trace_run2+0x90/0x154
  [  550.938105] [<900000000290abf0>] syscall_trace_enter.isra.0+0x1cc/0x200
  [  550.938224] [<90000000035dd1f0>] do_syscall+0x48/0x94
  [  550.938319] [<9000000002841c5c>] handle_syscall+0xbc/0x158
  [  550.938477]
  [  550.938607] Code: 580009ae  50016000  262402e4 <28c20085> 14092084  03a00084  16000024  03240084  00150006
  [  550.938851]
  [  550.939021] ---[ end trace 0000000000000000 ]---

Further investigation shows that this panic is triggered by memory
load operations:

  ptr = bpf_cgrp_storage_get(&map_a, task->cgroups->dfl_cgrp, 0,
                             BPF_LOCAL_STORAGE_GET_F_CREATE);

The expression `task->cgroups->dfl_cgrp` involves two memory load.
Since the field offset fits in imm12 or imm14, we use ldd or ldptrd
instructions. But both instructions have the side effect that it will
signed-extended the imm operand. Finally, we got the wrong addresses
and panics is inevitable.

Use a generic ldxd instruction to avoid this kind of issues.

With this change, we have:

  # ./test_progs -t cgrp_local_storage
  Can't find bpf_testmod.ko kernel module: -2
  WARNING! Selftests relying on bpf_testmod.ko will be skipped.
  test_cgrp_local_storage:PASS:join_cgroup /cgrp_local_storage 0 nsec
  #48/1    cgrp_local_storage/tp_btf:OK
  test_attach_cgroup:PASS:skel_open 0 nsec
  test_attach_cgroup:PASS:prog_attach 0 nsec
  test_attach_cgroup:PASS:prog_attach 0 nsec
  libbpf: prog 'update_cookie_tracing': failed to attach: ERROR: strerror_r(-524)=22
  test_attach_cgroup:FAIL:prog_attach unexpected error: -524
  #48/2    cgrp_local_storage/attach_cgroup:FAIL
  test_recursion:PASS:skel_open_and_load 0 nsec
  libbpf: prog 'on_lookup': failed to attach: ERROR: strerror_r(-524)=22
  libbpf: prog 'on_lookup': failed to auto-attach: -524
  test_recursion:FAIL:skel_attach unexpected error: -524 (errno 524)
  #48/3    cgrp_local_storage/recursion:FAIL
  #48/4    cgrp_local_storage/negative:OK
  #48/5    cgrp_local_storage/cgroup_iter_sleepable:OK
  test_yes_rcu_lock:PASS:skel_open 0 nsec
  test_yes_rcu_lock:PASS:skel_load 0 nsec
  libbpf: prog 'yes_rcu_lock': failed to attach: ERROR: strerror_r(-524)=22
  libbpf: prog 'yes_rcu_lock': failed to auto-attach: -524
  test_yes_rcu_lock:FAIL:skel_attach unexpected error: -524 (errno 524)
  #48/6    cgrp_local_storage/yes_rcu_lock:FAIL
  #48/7    cgrp_local_storage/no_rcu_lock:OK
  #48      cgrp_local_storage:FAIL

  All error logs:
  test_cgrp_local_storage:PASS:join_cgroup /cgrp_local_storage 0 nsec
  test_attach_cgroup:PASS:skel_open 0 nsec
  test_attach_cgroup:PASS:prog_attach 0 nsec
  test_attach_cgroup:PASS:prog_attach 0 nsec
  libbpf: prog 'update_cookie_tracing': failed to attach: ERROR: strerror_r(-524)=22
  test_attach_cgroup:FAIL:prog_attach unexpected error: -524
  #48/2    cgrp_local_storage/attach_cgroup:FAIL
  test_recursion:PASS:skel_open_and_load 0 nsec
  libbpf: prog 'on_lookup': failed to attach: ERROR: strerror_r(-524)=22
  libbpf: prog 'on_lookup': failed to auto-attach: -524
  test_recursion:FAIL:skel_attach unexpected error: -524 (errno 524)
  #48/3    cgrp_local_storage/recursion:FAIL
  test_yes_rcu_lock:PASS:skel_open 0 nsec
  test_yes_rcu_lock:PASS:skel_load 0 nsec
  libbpf: prog 'yes_rcu_lock': failed to attach: ERROR: strerror_r(-524)=22
  libbpf: prog 'yes_rcu_lock': failed to auto-attach: -524
  test_yes_rcu_lock:FAIL:skel_attach unexpected error: -524 (errno 524)
  #48/6    cgrp_local_storage/yes_rcu_lock:FAIL
  #48      cgrp_local_storage:FAIL
  Summary: 0/4 PASSED, 0 SKIPPED, 1 FAILED

No panics any more (The test still failed because lack of BPF trampoline
which I am actively working on).

Fixes: 5dc61552 ("LoongArch: Add BPF JIT support")
Signed-off-by: Hengqi Chen <hengqi.chen@gmail.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

Currently, we store syscall nr in pt_regs::regs[11] and syscall execve()
accidentally overrides it during its execution:

    sys_execve()
      -> do_execve()
        -> do_execveat_common()
          -> bprm_execve()
            -> exec_binprm()
              -> search_binary_handler()
                -> load_elf_binary()
                  -> ELF_PLAT_INIT()

ELF_PLAT_INIT() reset regs[11] to 0, so in syscall_exit_to_user_mode()
we later get a wrong syscall nr. This breaks tools like execsnoop since
it relies on execve() tracepoints.

Skip pt_regs::regs[11] reset in ELF_PLAT_INIT() to fix the issue.
Signed-off-by: Hengqi Chen <hengqi.chen@gmail.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

During unwinding, unwind_done() is used as an end condition. Normally it
unwind to the user stack and then set the stack type to unknown, which
is a normal exit. When something unexpected happens in unwind process
and we cannot unwind anymore, we should set the error flag, and also set
the stack type to unknown to indicate that the unwind process can not
continue. The error flag emphasizes that the unwind process produce an
unexpected error. There is no unexpected things when we unwind the PT_REGS
in the top of IRQ stack and find out that is an user mode PT_REGS. Thus,
we should not set error flag and just set stack type to unknown.
Reported-by: Hengqi Chen <hengqi.chen@gmail.com>
Acked-by: Hengqi Chen <hengqi.chen@gmail.com>
Signed-off-by: Jinyang He <hejinyang@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

As we are just discarding the stable clock ID, simply write it into
$zero instead of allocating a temporary register.
Signed-off-by: Xi Ruoyao <xry111@xry111.site>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

For the following assembly code:

     .text
     .global func
 func:
     nop

     .data
 var:
     .dword func

When linked with `-pie`, GNU LD populates the `var` variable with the
pre-relocated value of `func`. However, LLVM LLD does not exhibit the
same behavior. This issue also arises with the `kernel_entry` in arch/
loongarch/kernel/head.S:

 _head:
     .word   MZ_MAGIC                /* "MZ", MS-DOS header */
     .org    0x8
     .dword  kernel_entry            /* Kernel entry point */

The correct kernel entry from the MS-DOS header is crucial for jumping
to vmlinux from zboot. This necessity is why the compressed relocatable
kernel compiled by Clang encounters difficulties in booting.

To address this problem, it is proposed to apply dynamic relocations to
place with `--apply-dynamic-relocs`.

Link: https://github.com/ClangBuiltLinux/linux/issues/1962Signed-off-by: WANG Rui <wangrui@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

Pull SCSI fix from James Bottomley:
 "One tiny fix to the be2iscsi driver fixing a memory leak in an error
  leg"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: be2iscsi: Fix a memleak in beiscsi_init_wrb_handle()

Pull block fixes from Jens Axboe:
 "Nothing major in here, just miscellanous fixes for MD and NVMe:

   - NVMe pull request via Keith:
      - Proper nvme ctrl state setting (Keith)
      - Passthrough command optimization (Keith)
      - Spectre fix (Nitesh)
      - Kconfig clarifications (Shin'ichiro)
      - Frozen state deadlock fix (Bitao)
      - Power setting quirk (Georg)

   - MD pull requests via Song:
      - 6.7 regresisons with recovery/sync (Yu)
      - Reshape fix (David)"

* tag 'block-6.7-2023-12-08' of git://git.kernel.dk/linux:
  md: split MD_RECOVERY_NEEDED out of mddev_resume
  nvme-pci: Add sleep quirk for Kingston drives
  md: fix stopping sync thread
  md: don't leave 'MD_RECOVERY_FROZEN' in error path of md_set_readonly()
  md: fix missing flush of sync_work
  nvme: fix deadlock between reset and scan
  nvme: prevent potential spectre v1 gadget
  nvme: improve NVME_HOST_AUTH and NVME_TARGET_AUTH config descriptions
  nvme-ioctl: move capable() admin check to the end
  nvme: ensure reset state check ordering
  nvme: introduce helper function to get ctrl state
  md/raid6: use valid sector values to determine if an I/O should wait on the reshape

Pull io_uring fixes from Jens Axboe:
 "Two minor fixes for issues introduced in this release cycle, and two
  fixes for issues or potential issues that are heading to stable.

  One of these ends up disabling passing io_uring file descriptors via
  SCM_RIGHTS. There really shouldn't be an overlap between that kind of
  historic use case and modern usage of io_uring, which is why this was
  deemed appropriate"

* tag 'io_uring-6.7-2023-12-08' of git://git.kernel.dk/linux:
  io_uring/af_unix: disable sending io_uring over sockets
  io_uring/kbuf: check for buffer list readiness after NULL check
  io_uring/kbuf: Fix an NULL vs IS_ERR() bug in io_alloc_pbuf_ring()
  io_uring: fix mutex_unlock with unreferenced ctx

Pull rdma fixes from Jason Gunthorpe:
 "Primarily rtrs and irdma fixes:

   - Fix uninitialized value in ib_get_eth_speed()

   - Fix hns refusing to work if userspace doesn't select the correct
     congestion control algorithm

   - Several irdma fixes - unreliable Send Queue Drain, use after free,
     64k page size bugs, device removal races

   - Several rtrs bug fixes - crashes, memory leaks, use after free, bad
     credit accounting, bogus WARN_ON

   - Typos and a MAINTAINER update"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma:
  RDMA/irdma: Avoid free the non-cqp_request scratch
  RDMA/irdma: Fix support for 64k pages
  RDMA/irdma: Ensure iWarp QP queue memory is OS paged aligned
  RDMA/core: Fix umem iterator when PAGE_SIZE is greater then HCA pgsz
  RDMA/irdma: Fix UAF in irdma_sc_ccq_get_cqe_info()
  RDMA/bnxt_re: Correct module description string
  RDMA/rtrs-clt: Remove the warnings for req in_use check
  RDMA/rtrs-clt: Fix the max_send_wr setting
  RDMA/rtrs-srv: Destroy path files after making sure no IOs in-flight
  RDMA/rtrs-srv: Free srv_mr iu only when always_invalidate is true
  RDMA/rtrs-srv: Check return values while processing info request
  RDMA/rtrs-clt: Start hb after path_up
  RDMA/rtrs-srv: Do not unconditionally enable irq
  MAINTAINERS: Add Chengchang Tang as Hisilicon RoCE maintainer
  RDMA/irdma: Add wait for suspend on SQD
  RDMA/irdma: Do not modify to SQD on error
  RDMA/hns: Fix unnecessary err return when using invalid congest control algorithm
  RDMA/core: Fix uninit-value access in ib_get_eth_speed()

Pull power management fix from Rafael Wysocki:
 "Fix cpufreq reference counting in the DTPM (dynamic thermal and power
  management) power capping framework (Lukasz Luba)"

* tag 'pm-6.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  powercap: DTPM: Fix missing cpufreq_cpu_put() calls

Pull ACPI fix from Rafael Wysocki:
 "Fix a possible crash on an attempt to free unallocated memory in the
  error path of acpi_evaluate_reference() that has been introduced by
  one of the recent changes (Rafael Wysocki)"

* tag 'acpi-6.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI: utils: Fix error path in acpi_evaluate_reference()

Merge tag 'hwmon-for-v6.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging

Pull hwmon fixes from Guenter Roeck:

 - acpi_power_meter: Fix 4.29 MW output seen if acpi reports bad data

 - corsair-psu: Fix ability to probe if the driver is built into the kernel

 - ltc2991: Fix spelling mistake "contiuous" -> "continuous"

 - max31827: Add missing regulator header file include

 - nzxt-kraken2: Fix error handling path in probe function

* tag 'hwmon-for-v6.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  hwmon: (corsair-psu) Fix probe when built-in
  hwmon: (nzxt-kraken2) Fix error handling path in kraken2_probe()
  hwmon: (acpi_power_meter) Fix 4.29 MW bug
  hwmon: max31827: include regulator header
  hwmon: ltc2991: Fix spelling mistake "contiuous" -> "continuous"

Pull pwm fix from Uwe Kleine-König:
 "This fixes a null pointer exception in the bcm2835 pwm driver.

  The problem was introduced by a combination of two commits merged for
  v6.7-rc1 where each change alone would have been fine.

  Thanks to Florian Fainelli for noticing and fixing the issue"

* tag 'pwm/for-6.7-rc5-fixes' of https://git.pengutronix.de/git/ukl/linux:
  pwm: bcm2835: Fix NPD in suspend/resume

Pull sound fixes from Takashi Iwai:
 "This is a typical bump in the middle of its way; we've gathered lots
  of fixes (mostly for ASoC) at this time:

   - PCM array out-of-bound access fix

   - Correction of SOC PCM merge error

   - Lots of ASoC SOF Intel updates

   - A few ASoC AMD quirks

   - More proper timer handling in PCM test module

   - HD-audio and USB-audio quirks as usual

   - Other device-specific fixes for various ASoC codecs"

* tag 'sound-6.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (39 commits)
  ALSA: hda/realtek: Add quirk for Lenovo Yoga Pro 7
  ALSA: pcmtest: stop timer before buffer is released
  ALSA: hda/realtek: Add Framework laptop 16 to quirks
  ALSA: hda/realtek: add new Framework laptop to quirks
  ALSA: pcm: fix out-of-bounds in snd_pcm_state_names
  ASoC: qcom: sc8280xp: Limit speaker digital volumes
  ASoC: ops: add correct range check for limiting volume
  ALSA: hda/realtek: Enable headset on Lenovo M90 Gen5
  ALSA: hda/realtek: fix speakers on XPS 9530 (2023)
  ALSA: usb-audio: Add Pioneer DJM-450 mixer controls
  ASoC: wm_adsp: fix memleak in wm_adsp_buffer_populate
  ASoC: da7219: Support low DC impedance headset
  ASoC: amd: acp: Add support for a new Huawei Matebook laptop
  ALSA: hda/realtek: Apply quirk for ASUS UM3504DA
  ASoC: SOF: ipc4-topology: Correct data structures for the GAIN module
  ASoC: SOF: ipc4-topology: Correct data structures for the SRC module
  ASoC: hdac_hda: Conditionally register dais for HDMI and Analog
  ASoC: codecs: lpass-tx-macro: set active_decimator correct default value
  ASoC: amd: yc: Fix non-functional mic on ASUS E1504FA
  ASoC: amd: yc: Add DMI entry to support System76 Pangolin 13
  ...

Pull drm fixes from Dave Airlie:
 "Regular weekly fixes, mostly amdgpu and i915 as usual. A couple of
  nouveau, panfrost, one core and one bridge Kconfig.

  Seems about normal for rc5.

  atomic-helpers:
   - invoke end_fb_access while owning plane state

  i915:
   - fix a missing dep for a previous fix
   - Relax BXT/GLK DSI transcoder hblank limits
   - Fix DP MST .mode_valid_ctx() return values
   - Reject DP MST modes that require bigjoiner (as it's not yet
     supported on DP MST)
   - Fix _intel_dsb_commit() variable type to allow negative values

  nouveau:
   - document some bits of gsp rm
   - flush vmm more on tu102 to avoid hangs

  panfrost:
   - fix imported dma-buf objects residency
   - fix device freq update

  bridge:
   - tc358768 - fix Kconfig

  amdgpu:
   - Disable MCBP on gfx9
   - DC vbios fix
   - eDP fix
   - dml2 UBSAN fix
   - SMU 14 fix
   - RAS fixes
   - dml KASAN/KCSAN fix
   - PSP 13 fix
   - Clockgating fixes
   - Suspend fix

  exynos:
   - fix pointer dereference
   - fix wrong error check"

* tag 'drm-fixes-2023-12-08' of git://anongit.freedesktop.org/drm/drm: (27 commits)
  drm/exynos: fix a wrong error checking
  drm/exynos: fix a potential error pointer dereference
  drm/amdgpu: fix buffer funcs setting order on suspend
  drm/amdgpu: Avoid querying DRM MGCG status
  drm/amdgpu: Update HDP 4.4.2 clock gating flags
  drm/amdgpu: Add NULL checks for function pointers
  drm/amdgpu: Restrict extended wait to PSP v13.0.6
  drm/amd/display: Increase frame warning limit with KASAN or KCSAN in dml
  drm/amdgpu: optimize the printing order of error data
  drm/amdgpu: Update fw version for boot time error query
  drm/amd/pm: support new mca smu error code decoding
  drm/amd/swsmu: update smu v14_0_0 driver if version and metrics table
  drm/amd/display: Fix array-index-out-of-bounds in dml2
  drm/amd/display: Add monitor patch for specific eDP
  drm/amd/display: Use channel_width = 2 for vram table 3.0
  drm/amdgpu: disable MCBP by default
  drm/atomic-helpers: Invoke end_fb_access while owning plane state
  drm/i915: correct the input parameter on _intel_dsb_commit()
  drm/i915/mst: Reject modes that require the bigjoiner
  drm/i915/mst: Fix .mode_valid_ctx() return values
  ...

In general, activating long mode involves setting the EFER_LME bit in
the EFER register and then enabling the X86_CR0_PG bit in the CR0
register. At this point, the EFER_LMA bit will be set automatically by
hardware.

In the case of SVM/SEV guests where writes to CR0 are intercepted, it's
necessary for the host to set EFER_LMA on behalf of the guest since
hardware does not see the actual CR0 write.

In the case of SEV-ES guests where writes to CR0 are trapped instead of
intercepted, the hardware *does* see/record the write to CR0 before
exiting and passing the value on to the host, so as part of enabling
SEV-ES support commit f1c6366e ("KVM: SVM: Add required changes to
support intercepts under SEV-ES") dropped special handling of the
EFER_LMA bit with the understanding that it would be set automatically.

However, since the guest never explicitly sets the EFER_LMA bit, the
host never becomes aware that it has been set. This becomes problematic
when userspace tries to get/set the EFER values via
KVM_GET_SREGS/KVM_SET_SREGS, since the EFER contents tracked by the host
will be missing the EFER_LMA bit, and when userspace attempts to pass
the EFER value back via KVM_SET_SREGS it will fail a sanity check that
asserts that EFER_LMA should always be set when X86_CR0_PG and EFER_LME
are set.

Fix this by always inferring the value of EFER_LMA based on X86_CR0_PG
and EFER_LME, regardless of whether or not SEV-ES is enabled.

Fixes: f1c6366e ("KVM: SVM: Add required changes to support intercepts under SEV-ES")
Reported-by: Peter Gonda <pgonda@google.com>
Cc: stable@vger.kernel.org
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210507165947.2502412-2-seanjc@google.com>
[A two year old patch that was revived after we noticed the failure in
 KVM_SET_SREGS and a similar patch was posted by Michael Roth.  This is
 Sean's patch, but with Michael's more complete commit message. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

It seems that when the driver is built-in, the HID bus is
initialized after the driver is loaded, which whould cause
module_hid_driver() to fail.
Fix this by registering the driver after the HID bus using
late_initcall() in accordance with other hwmon HID drivers.
Signed-off-by: Armin Wolf <W_Armin@gmx.de>
Link: https://lore.kernel.org/r/20231207210723.222552-1-W_Armin@gmx.de
[groeck: Dropped "compile tested" comment; the patch has been tested
 but the tester did not provide a Tested-by: tag]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Using -MD without -MP causes build failures when a header file is deleted
or moved. With -MP, the compiler will emit phony targets for the header
files it lists as dependencies, and the Makefiles won't refuse to attempt
to rebuild a C unit which no longer includes the deleted header.
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Link: https://lore.kernel.org/r/9fc8b5395321abbfcaf5d78477a9a7cd350b08e4.camel@infradead.orgSigned-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

Pass MAGIC_TOKEN to __TEST_REQUIRE() when printing the help message about
needing to pass a magic value to manually run the NX hugepages test,
otherwise the help message will contain garbage.

  In file included from x86_64/nx_huge_pages_test.c:15:
  x86_64/nx_huge_pages_test.c: In function ‘main’:
  include/test_util.h:40:32: error: format ‘%d’ expects a matching ‘int’ argument [-Werror=format=]
     40 |                 ksft_exit_skip("- " fmt "\n", ##__VA_ARGS__);   \
        |                                ^~~~
  x86_64/nx_huge_pages_test.c:259:9: note: in expansion of macro ‘__TEST_REQUIRE’
    259 |         __TEST_REQUIRE(token == MAGIC_TOKEN,
        |         ^~~~~~~~~~~~~~
Signed-off-by: angquan yu <angquan21@gmail.com>
Link: https://lore.kernel.org/r/20231128221105.63093-1-angquan21@gmail.com
[sean: rewrite shortlog+changelog]
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

KVM fixes for 6.7-rcN:

 - When checking if a _running_ vCPU is "in-kernel", i.e. running at CPL0,
   get the CPL directly instead of relying on preempted_in_kernel, which
   is valid if and only if the vCPU was preempted, i.e. NOT running.

 - Set .owner for various KVM file_operations so that files refcount the
   KVM module until KVM is done executing _all_ code, including the last
   few instructions of kvm_put_kvm().  And then revert the misguided
   attempt to rely on "struct kvm" refcounts to pin KVM-the-module.

 - Fix a benign "return void" that was recently introduced.

Merge tag 'kvm-s390-master-6.7-1' of https://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into kvm-master

Two small but important bugfixes.

Merge tag 'kvmarm-fixes-6.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into kvm-master

KVM/arm64 fixes for 6.7, take #1

 - Avoid mapping vLPIs that have already been mapped