linux-2.6-microblaze.git
2 years agoMerge tag 'spi-fix-v5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brooni...
Linus Torvalds [Thu, 18 Nov 2021 22:35:41 +0000 (14:35 -0800)]
Merge tag 'spi-fix-v5.16-rc1' of git://git./linux/kernel/git/broonie/spi

Pull spi fixes from Mark Brown:
 "A few small fixes for v5.16, one in the core for an issue with
  handling of controller unregistration that was introduced with the
  fixes for registering nested SPI controllers and a few more minor
  device specific ones"

* tag 'spi-fix-v5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
  spi: fix use-after-free of the add_lock mutex
  spi: spi-geni-qcom: fix error handling in spi_geni_grab_gpi_chan()
  spi: lpspi: Silence error message upon deferred probe
  spi: cadence-quadspi: fix write completion support

2 years agoARM: socfpga: Fix crash with CONFIG_FORTIRY_SOURCE
Takashi Iwai [Thu, 18 Nov 2021 14:25:08 +0000 (15:25 +0100)]
ARM: socfpga: Fix crash with CONFIG_FORTIRY_SOURCE

When CONFIG_FORTIFY_SOURCE is set, memcpy() checks the potential
buffer overflow and panics.  The code in sofcpga bootstrapping
contains the memcpy() calls are mistakenly translated as the shorter
size, hence it triggers a panic as if it were overflowing.

This patch changes the secondary_trampoline and *_end definitions
to arrays for avoiding the false-positive crash above.

Fixes: 9c4566a117a6 ("ARM: socfpga: Enable SMP for socfpga")
Suggested-by: Kees Cook <keescook@chromium.org>
Buglink: https://bugzilla.suse.com/show_bug.cgi?id=1192473
Link: https://lore.kernel.org/r/20211117193244.31162-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>
2 years agoALSA: ctxfi: Fix out-of-range access
Takashi Iwai [Thu, 18 Nov 2021 21:57:29 +0000 (22:57 +0100)]
ALSA: ctxfi: Fix out-of-range access

The master and next_conj of rcs_ops are used for iterating the
resource list entries, and currently those are supposed to return the
current value.  The problem is that next_conf may go over the last
entry before the loop abort condition is evaluated, and it may return
the "current" value that is beyond the array size.  It was caught
recently as a GPF, for example.

Those return values are, however, never actually evaluated, hence
basically we don't have to consider the current value as the return at
all.  By dropping those return values, the potential out-of-range
access above is also fixed automatically.

This patch changes the return type of master and next_conj callbacks
to void and drop the superfluous code accordingly.

BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=214985
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20211118215729.26257-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2 years agolib: zstd: Don't add -O3 to cflags
Nick Terrell [Tue, 16 Nov 2021 23:11:39 +0000 (15:11 -0800)]
lib: zstd: Don't add -O3 to cflags

After the update to zstd-1.4.10 passing -O3 is no longer necessary to
get good performance from zstd. Using the default optimization level -O2
is sufficient to get good performance.

I've measured no significant change to compression speed, and a ~1%
decompression speed loss, which is acceptable.

This fixes the reported parisc -Wframe-larger-than=1536 errors [0]. The
gcc-8-hppa-linux-gnu compiler performed very poorly with -O3, generating
stacks that are ~3KB. With -O2 these same functions generate stacks in
the < 100B, completely fixing the problem. Function size deltas are
listed below:

ZSTD_compressBlock_fast_extDict_generic: 3800 -> 68
ZSTD_compressBlock_fast: 2216 -> 40
ZSTD_compressBlock_fast_dictMatchState: 1848 ->  64
ZSTD_compressBlock_doubleFast_extDict_generic: 3744 -> 76
ZSTD_fillDoubleHashTable: 3252 -> 0
ZSTD_compressBlock_doubleFast: 5856 -> 36
ZSTD_compressBlock_doubleFast_dictMatchState: 5380 -> 84
ZSTD_copmressBlock_lazy2: 2420 -> 72

Additionally, this improves the reported code bloat [1]. With gcc-11
bloat-o-meter shows an 80KB code size improvement:

```
> ../scripts/bloat-o-meter vmlinux.old vmlinux
add/remove: 31/8 grow/shrink: 24/155 up/down: 25734/-107924 (-82190)
Total: Before=6418562, After=6336372, chg -1.28%
```

Compared to before the zstd-1.4.10 update we see a total code size
regression of 105KB, down from 374KB at v5.16-rc1:

```
> ../scripts/bloat-o-meter vmlinux.old vmlinux
add/remove: 292/62 grow/shrink: 56/88 up/down: 235009/-127487 (107522)
Total: Before=6228850, After=6336372, chg +1.73%
```

[0] https://lkml.org/lkml/2021/11/15/710
[1] https://lkml.org/lkml/2021/11/14/189

Link: https://lore.kernel.org/r/20211117014949.1169186-4-nickrterrell@gmail.com/
Link: https://lore.kernel.org/r/20211117201459.1194876-4-nickrterrell@gmail.com/
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Tested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Nick Terrell <terrelln@fb.com>
2 years agolib: zstd: Don't inline functions in zstd_opt.c
Nick Terrell [Tue, 16 Nov 2021 04:33:08 +0000 (20:33 -0800)]
lib: zstd: Don't inline functions in zstd_opt.c

`zstd_opt.c` contains the match finder for the highest compression
levels. These levels are already very slow, and are unlikely to be used
in the kernel. If they are used, they shouldn't be used in latency
sensitive workloads, so slowing them down shouldn't be a big deal.

This saves 188 KB of the 288 KB regression reported by Geert Uytterhoeven [0].
I've also opened an issue upstream [1] so that we can properly tackle
the code size issue in `zstd_opt.c` for all users, and can hopefully
remove this hack in the next zstd version we import.

Bloat-o-meter output on x86-64:

```
> ../scripts/bloat-o-meter vmlinux.old vmlinux
add/remove: 6/5 grow/shrink: 1/9 up/down: 16673/-209939 (-193266)
Function                                     old     new   delta
ZSTD_compressBlock_opt_generic.constprop       -    7559   +7559
ZSTD_insertBtAndGetAllMatches                  -    6304   +6304
ZSTD_insertBt1                                 -    1731   +1731
ZSTD_storeSeq                                  -     693    +693
ZSTD_BtGetAllMatches                           -     255    +255
ZSTD_updateRep                                 -     128    +128
ZSTD_updateTree                               96      99      +3
ZSTD_insertAndFindFirstIndexHash3             81       -     -81
ZSTD_setBasePrices.constprop                  98       -     -98
ZSTD_litLengthPrice.constprop                138       -    -138
ZSTD_count                                   362     181    -181
ZSTD_count_2segments                        1407     938    -469
ZSTD_insertBt1.constprop                    2689       -   -2689
ZSTD_compressBlock_btultra2                19990     423  -19567
ZSTD_compressBlock_btultra                 19633      15  -19618
ZSTD_initStats_ultra                       19825       -  -19825
ZSTD_compressBlock_btopt                   20374      12  -20362
ZSTD_compressBlock_btopt_extDict           29984      12  -29972
ZSTD_compressBlock_btultra_extDict         30718      15  -30703
ZSTD_compressBlock_btopt_dictMatchState    32689      12  -32677
ZSTD_compressBlock_btultra_dictMatchState   33574      15  -33559
Total: Before=6611828, After=6418562, chg -2.92%
```

[0] https://lkml.org/lkml/2021/11/14/189
[1] https://github.com/facebook/zstd/issues/2862

Link: https://lore.kernel.org/r/20211117014949.1169186-3-nickrterrell@gmail.com/
Link: https://lore.kernel.org/r/20211117201459.1194876-3-nickrterrell@gmail.com/
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Tested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Nick Terrell <terrelln@fb.com>
2 years agolib: zstd: Fix unused variable warning
Nick Terrell [Tue, 16 Nov 2021 03:08:19 +0000 (19:08 -0800)]
lib: zstd: Fix unused variable warning

The variable `litLengthSum` is only used by an `assert()`, so when
asserts are disabled the compiler doesn't see any usage and warns.

This issue is already fixed upstream by PR #2838 [0]. It was reported
by the Kernel test robot in [1].

Another approach would be to change zstd's disabled `assert()`
definition to use the argument in a disabled branch, instead of
ignoring the argument. I've avoided this approach because there are
some small changes necessary to get zstd to build, and I would
want to thoroughly re-test for performance, since that is slightly
changing the code in every function in zstd. It seems like a
trivial change, but some functions are pretty sensitive to small
changes. However, I think it is a valid approach that I would
like to see upstream take, so I've opened Issue #2868 to attempt
this upstream.

Lastly, I've chosen not to use __maybe_unused because all code
in lib/zstd/ must eventually be upstreamed. Upstream zstd can't
use __maybe_unused because it isn't portable across all compilers.

[0] https://github.com/facebook/zstd/pull/2838
[1] https://lore.kernel.org/linux-mm/202111120312.833wII4i-lkp@intel.com/T/
[2] https://github.com/facebook/zstd/issues/2868

Link: https://lore.kernel.org/r/20211117014949.1169186-2-nickrterrell@gmail.com/
Link: https://lore.kernel.org/r/20211117201459.1194876-2-nickrterrell@gmail.com/
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Nick Terrell <terrelln@fb.com>
2 years agoMerge tag 'net-5.16-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Linus Torvalds [Thu, 18 Nov 2021 20:54:24 +0000 (12:54 -0800)]
Merge tag 'net-5.16-rc2' of git://git./linux/kernel/git/netdev/net

Pull networking fixes from Jakub Kicinski:
 "Including fixes from bpf, mac80211.

  Current release - regressions:

   - devlink: don't throw an error if flash notification sent before
     devlink visible

   - page_pool: Revert "page_pool: disable dma mapping support...",
     turns out there are active arches who need it

  Current release - new code bugs:

   - amt: cancel delayed_work synchronously in amt_fini()

  Previous releases - regressions:

   - xsk: fix crash on double free in buffer pool

   - bpf: fix inner map state pruning regression causing program
     rejections

   - mac80211: drop check for DONT_REORDER in __ieee80211_select_queue,
     preventing mis-selecting the best effort queue

   - mac80211: do not access the IV when it was stripped

   - mac80211: fix radiotap header generation, off-by-one

   - nl80211: fix getting radio statistics in survey dump

   - e100: fix device suspend/resume

  Previous releases - always broken:

   - tcp: fix uninitialized access in skb frags array for Rx 0cp

   - bpf: fix toctou on read-only map's constant scalar tracking

   - bpf: forbid bpf_ktime_get_coarse_ns and bpf_timer_* in tracing
     progs

   - tipc: only accept encrypted MSG_CRYPTO msgs

   - smc: transfer remaining wait queue entries during fallback, fix
     missing wake ups

   - udp: validate checksum in udp_read_sock() (when sockmap is used)

   - sched: act_mirred: drop dst for the direction from egress to
     ingress

   - virtio_net_hdr_to_skb: count transport header in UFO, prevent
     allowing bad skbs into the stack

   - nfc: reorder the logic in nfc_{un,}register_device, fix unregister

   - ipsec: check return value of ipv6_skip_exthdr

   - usb: r8152: add MAC passthrough support for more Lenovo Docks"

* tag 'net-5.16-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (96 commits)
  ptp: ocp: Fix a couple NULL vs IS_ERR() checks
  net: ethernet: dec: tulip: de4x5: fix possible array overflows in type3_infoblock()
  net: tulip: de4x5: fix the problem that the array 'lp->phy[8]' may be out of bound
  ipv6: check return value of ipv6_skip_exthdr
  e100: fix device suspend/resume
  devlink: Don't throw an error if flash notification sent before devlink visible
  page_pool: Revert "page_pool: disable dma mapping support..."
  ethernet: hisilicon: hns: hns_dsaf_misc: fix a possible array overflow in hns_dsaf_ge_srst_by_port()
  octeontx2-af: debugfs: don't corrupt user memory
  NFC: add NCI_UNREG flag to eliminate the race
  NFC: reorder the logic in nfc_{un,}register_device
  NFC: reorganize the functions in nci_request
  tipc: check for null after calling kmemdup
  i40e: Fix display error code in dmesg
  i40e: Fix creation of first queue by omitting it if is not power of two
  i40e: Fix warning message and call stack during rmmod i40e driver
  i40e: Fix ping is lost after configuring ADq on VF
  i40e: Fix changing previously set num_queue_pairs for PFs
  i40e: Fix NULL ptr dereference on VSI filter sync
  i40e: Fix correct max_pkt_size on VF RX queue
  ...

2 years agoMerge tag 'for-5.16-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave...
Linus Torvalds [Thu, 18 Nov 2021 20:41:14 +0000 (12:41 -0800)]
Merge tag 'for-5.16-rc1-tag' of git://git./linux/kernel/git/kdave/linux

Pull btrfs fixes from David Sterba:
 "Several xes and one old ioctl deprecation. Namely there's fix for
  crashes/warnings with lzo compression that was suspected to be caused
  by first pull merge resolution, but it was a different bug.

  Summary:

   - regression fix for a crash in lzo due to missing boundary checks of
     the page array

   - fix crashes on ARM64 due to missing barriers when synchronizing
     status bits between work queues

   - silence lockdep when reading chunk tree during mount

   - fix false positive warning in integrity checker on devices with
     disabled write caching

   - fix signedness of bitfields in scrub

   - start deprecation of balance v1 ioctl"

* tag 'for-5.16-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  btrfs: deprecate BTRFS_IOC_BALANCE ioctl
  btrfs: make 1-bit bit-fields of scrub_page unsigned int
  btrfs: check-integrity: fix a warning on write caching disabled disk
  btrfs: silence lockdep when reading chunk tree during mount
  btrfs: fix memory ordering between normal and ordered work functions
  btrfs: fix a out-of-bound access in copy_compressed_data_to_page()

2 years agoMerge tag 'fs_for_v5.16-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/jack...
Linus Torvalds [Thu, 18 Nov 2021 20:31:29 +0000 (12:31 -0800)]
Merge tag 'fs_for_v5.16-rc2' of git://git./linux/kernel/git/jack/linux-fs

Pull UDF fix from Jan Kara:
 "A fix for a long-standing UDF bug where we were not properly
  validating directory position inside readdir"

* tag 'fs_for_v5.16-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  udf: Fix crash after seekdir

2 years agoMerge tag 'fs.idmapped.v5.16-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Thu, 18 Nov 2021 20:17:33 +0000 (12:17 -0800)]
Merge tag 'fs.idmapped.v5.16-rc2' of git://git./linux/kernel/git/brauner/linux

Pull setattr idmapping fix from Christian Brauner:
 "This contains a simple fix for setattr. When determining the validity
  of the attributes the ia_{g,u}id fields contain the value that will be
  written to inode->i_{g,u}id. When the {g,u}id attribute of the file
  isn't altered and the caller's fs{g,u}id matches the current {g,u}id
  attribute the attribute change is allowed.

  The value in ia_{g,u}id does already account for idmapped mounts and
  will have taken the relevant idmapping into account. So in order to
  verify that the {g,u}id attribute isn't changed we simple need to
  compare the ia_{g,u}id value against the inode's i_{g,u}id value.

  This only has any meaning for idmapped mounts as idmapping helpers are
  idempotent without them. And for idmapped mounts this really only has
  a meaning when circular idmappings are used, i.e. mappings where e.g.
  id 1000 is mapped to id 1001 and id 1001 is mapped to id 1000. Such
  ciruclar mappings can e.g. be useful when sharing the same home
  directory between multiple users at the same time.

  Before this patch we could end up denying legitimate attribute changes
  and allowing invalid attribute changes when circular mappings are
  used. To even get into this situation the caller must've been
  privileged both to create that mapping and to create that idmapped
  mount.

  This hasn't been seen in the wild anywhere but came up when expanding
  the fstest suite during work on a series of hardening patches. All
  idmapped fstests pass without any regressions and we're adding new
  tests to verify the behavior of circular mappings.

  The new tests can be found at [1]"

Link: https://lore.kernel.org/linux-fsdevel/20211109145713.1868404-2-brauner@kernel.org
* tag 'fs.idmapped.v5.16-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux:
  fs: handle circular mappings correctly

2 years agoMerge tag 'for-5.16/parisc-4' of git://git.kernel.org/pub/scm/linux/kernel/git/deller...
Linus Torvalds [Thu, 18 Nov 2021 20:13:24 +0000 (12:13 -0800)]
Merge tag 'for-5.16/parisc-4' of git://git./linux/kernel/git/deller/parisc-linux

Pull parisc fixes from Helge Deller:
 "parisc bug and warning fixes and wire up futex_waitv.

  Fix some warnings which showed up with allmodconfig builds, a revert
  of a change to the sigreturn trampoline which broke signal handling,
  wire up futex_waitv and add CONFIG_PRINTK_TIME=y to 32bit defconfig"

* tag 'for-5.16/parisc-4' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: Enable CONFIG_PRINTK_TIME=y in 32bit defconfig
  Revert "parisc: Reduce sigreturn trampoline to 3 instructions"
  parisc: Wrap assembler related defines inside __ASSEMBLY__
  parisc: Wire up futex_waitv
  parisc: Include stringify.h to avoid build error in crypto/api.c
  parisc/sticon: fix reverse colors

2 years agomm: Add functions to zero portions of a folio
Matthew Wilcox (Oracle) [Fri, 5 Nov 2021 14:19:05 +0000 (10:19 -0400)]
mm: Add functions to zero portions of a folio

These functions are wrappers around zero_user_segments(), which means
that zero_user_segments() can now be called for compound pages even when
CONFIG_TRANSPARENT_HUGEPAGE is disabled.

Use 'xend' as the name of the parameter to indicate that this is an
excluded end, not the more usual included end.  Excluding the end makes
more sense to the callers, but can cause confusion to readers who are
more used to seeing included ends.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
2 years agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Linus Torvalds [Thu, 18 Nov 2021 20:05:22 +0000 (12:05 -0800)]
Merge tag 'for-linus' of git://git./virt/kvm/kvm

Pull KVM fixes from Paolo Bonzini:
 "Selftest changes:

   - Cleanups for the perf test infrastructure and mapping hugepages

   - Avoid contention on mmap_sem when the guests start to run

   - Add event channel upcall support to xen_shinfo_test

  x86 changes:

   - Fixes for Xen emulation

   - Kill kvm_map_gfn() / kvm_unmap_gfn() and broken gfn_to_pfn_cache

   - Fixes for migration of 32-bit nested guests on 64-bit hypervisor

   - Compilation fixes

   - More SEV cleanups

  Generic:

   - Cap the return value of KVM_CAP_NR_VCPUS to both KVM_CAP_MAX_VCPUS
     and num_online_cpus(). Most architectures were only using one of
     the two"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (42 commits)
  KVM: x86: Cap KVM_CAP_NR_VCPUS by KVM_CAP_MAX_VCPUS
  KVM: s390: Cap KVM_CAP_NR_VCPUS by num_online_cpus()
  KVM: RISC-V: Cap KVM_CAP_NR_VCPUS by KVM_CAP_MAX_VCPUS
  KVM: PPC: Cap KVM_CAP_NR_VCPUS by KVM_CAP_MAX_VCPUS
  KVM: MIPS: Cap KVM_CAP_NR_VCPUS by KVM_CAP_MAX_VCPUS
  KVM: arm64: Cap KVM_CAP_NR_VCPUS by kvm_arm_default_max_vcpus()
  KVM: x86: Assume a 64-bit hypercall for guests with protected state
  selftests: KVM: Add /x86_64/sev_migrate_tests to .gitignore
  riscv: kvm: fix non-kernel-doc comment block
  KVM: SEV: Fix typo in and tweak name of cmd_allowed_from_miror()
  KVM: SEV: Drop a redundant setting of sev->asid during initialization
  KVM: SEV: WARN if SEV-ES is marked active but SEV is not
  KVM: SEV: Set sev_info.active after initial checks in sev_guest_init()
  KVM: SEV: Disallow COPY_ENC_CONTEXT_FROM if target has created vCPUs
  KVM: Kill kvm_map_gfn() / kvm_unmap_gfn() and gfn_to_pfn_cache
  KVM: nVMX: Use a gfn_to_hva_cache for vmptrld
  KVM: nVMX: Use kvm_read_guest_offset_cached() for nested VMCS check
  KVM: x86/xen: Use sizeof_field() instead of open-coding it
  KVM: nVMX: Use kvm_{read,write}_guest_cached() for shadow_vmcs12
  KVM: x86/xen: Fix get_attr of KVM_XEN_ATTR_TYPE_SHARED_INFO
  ...

2 years agoMerge branch 'thermal-int340x'
Rafael J. Wysocki [Thu, 18 Nov 2021 19:40:28 +0000 (20:40 +0100)]
Merge branch 'thermal-int340x'

Merge int340x thermal driver Kconfig fix for 5.16-rc2.

* thermal-int340x:
  thermal: int340x: Limit Kconfig to 64-bit

2 years agoMerge branch 'powercap'
Rafael J. Wysocki [Thu, 18 Nov 2021 19:34:57 +0000 (20:34 +0100)]
Merge branch 'powercap'

Merge a Dynamic Thermal Power Management (DTPM) framework fix for
5.16-rc2.

* powercap:
  powercap: DTPM: Fix suspend failure and kernel warning

2 years agoMerge tag 'docs-5.16-2' of git://git.lwn.net/linux
Linus Torvalds [Thu, 18 Nov 2021 19:01:06 +0000 (11:01 -0800)]
Merge tag 'docs-5.16-2' of git://git.lwn.net/linux

Pull documentation fixes from Jonathan Corbet:
 "A handful of documentation fixes for 5.16"

* tag 'docs-5.16-2' of git://git.lwn.net/linux:
  Documentation/process: fix a cross reference
  Documentation: update vcpu-requests.rst reference
  docs: accounting: update delay-accounting.rst reference
  libbpf: update index.rst reference
  docs: filesystems: Fix grammatical error "with" to "which"
  doc/zh_CN: fix a translation error in management-style
  docs: ftrace: fix the wrong path of tracefs
  Documentation: arm: marvell: Fix link to armada_1000_pb.pdf document
  Documentation: arm: marvell: Put Armada XP section between Armada 370 and 375
  Documentation: arm: marvell: Add some links to homepage / product infos
  docs: Update Sphinx requirements

2 years agotracing/histogram: Fix UAF in destroy_hist_field()
Kalesh Singh [Thu, 18 Nov 2021 01:15:42 +0000 (17:15 -0800)]
tracing/histogram: Fix UAF in destroy_hist_field()

Calling destroy_hist_field() on an expression will recursively free
any operands associated with the expression. If during expression
parsing the operands of the expression are already set when an error
is encountered, there is no need to explicity free the operands. Doing
so will result in destroy_hist_field() being called twice for the
operands and lead to a use-after-free (UAF) error.

If the operands are associated with the expression, only call
destroy_hist_field() on the expression since the operands will be
recursively freed.

Link: https://lore.kernel.org/all/CAHk-=wgcrEbFgkw9720H3tW-AhHOoEKhYwZinYJw4FpzSaJ6_Q@mail.gmail.com/
Link: https://lkml.kernel.org/r/20211118011542.1420131-1-kaleshsingh@google.com
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Kalesh Singh <kaleshsingh@google.com>
Fixes: 8b5d46fd7a38 ("tracing/histogram: Optimize division by constants")
Reported-by: kernel test robot <oliver.sang@intel.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2 years agoMerge tag 'printk-for-5.16-fixup' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Thu, 18 Nov 2021 18:50:45 +0000 (10:50 -0800)]
Merge tag 'printk-for-5.16-fixup' of git://git./linux/kernel/git/printk/linux

Pull printk fixes from Petr Mladek:

 - Try to flush backtraces from other CPUs also on the local one. This
   was a regression caused by printk_safe buffers removal.

 - Remove header dependency warning.

* tag 'printk-for-5.16-fixup' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux:
  printk: Remove printk.h inclusion in percpu.h
  printk: restore flushing of NMI buffers on remote CPUs after NMI backtraces

2 years agoMerge tag 'asoc-fix-v5.16-rc1' of https://git.kernel.org/pub/scm/linux/kernel/git...
Takashi Iwai [Thu, 18 Nov 2021 17:57:41 +0000 (18:57 +0100)]
Merge tag 'asoc-fix-v5.16-rc1' of https://git./linux/kernel/git/broonie/sound into for-linus

ASoC: Fixes for v5.16

A relatively large collection of fixes that came in since the merge
window, though a lot of this is just a collection of new machine quirks
for x86 platforms.

2 years agoftrace/samples: add s390 support for ftrace direct multi sample
Heiko Carstens [Mon, 15 Nov 2021 19:56:14 +0000 (20:56 +0100)]
ftrace/samples: add s390 support for ftrace direct multi sample

Add s390 architecture support for the ftrace direct multi sample.
See commit 5fae941b9a6f ("ftrace/samples: Add multi direct interface
test module") for further details.

Link: https://lore.kernel.org/r/20211115195614.3173346-3-hca@linux.ibm.com
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2 years agoftrace/samples: add missing Kconfig option for ftrace direct multi sample
Heiko Carstens [Mon, 15 Nov 2021 19:56:13 +0000 (20:56 +0100)]
ftrace/samples: add missing Kconfig option for ftrace direct multi sample

Currently it is not possible to build the ftrace direct multi example
anymore due to broken config dependencies. Fix this by adding
SAMPLE_FTRACE_DIRECT_MULTI config option.

This broke when merging s390-5.16-1 due to an incorrect merge conflict
resolution proposed by me.

Also rename SAMPLE_FTRACE_MULTI_DIRECT to SAMPLE_FTRACE_DIRECT_MULTI
so it matches the module name.

Fixes: 0b707e572a19 ("Merge tag 's390-5.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux")
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Link: https://lore.kernel.org/r/20211115195614.3173346-2-hca@linux.ibm.com
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2 years agoMAINTAINERS: update email address of Christian Borntraeger
Christian Borntraeger [Tue, 16 Nov 2021 13:58:03 +0000 (14:58 +0100)]
MAINTAINERS: update email address of Christian Borntraeger

My borntraeger@de.ibm.com email is just a forwarder to the
linux.ibm.com address. Let us remove the extra hop to avoid
a potential source of errors.

While at it, add the relevant email addresses to mailmap.

Signed-off-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Link: https://lore.kernel.org/r/20211116135803.119489-2-borntraeger@linux.ibm.com
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2 years agos390/kexec: fix memory leak of ipl report buffer
Baoquan He [Tue, 16 Nov 2021 03:31:01 +0000 (11:31 +0800)]
s390/kexec: fix memory leak of ipl report buffer

unreferenced object 0x38000195000 (size 4096):
  comm "kexec", pid 8548, jiffies 4294953647 (age 32443.270s)
  hex dump (first 32 bytes):
    00 00 00 c8 20 00 00 00 00 00 00 c0 02 80 00 00  .... ...........
    40 40 40 40 40 40 40 40 00 00 00 00 00 00 00 00  @@@@@@@@........
  backtrace:
    [<0000000011a2f199>] __vmalloc_node_range+0xc0/0x140
    [<0000000081fa2752>] vzalloc+0x5a/0x70
    [<0000000063a4c92d>] ipl_report_finish+0x2c/0x180
    [<00000000553304da>] kexec_file_add_ipl_report+0xf4/0x150
    [<00000000862d033f>] kexec_file_add_components+0x124/0x160
    [<000000000d2717bb>] arch_kexec_kernel_image_load+0x62/0x90
    [<000000002e0373b6>] kimage_file_alloc_init+0x1aa/0x2e0
    [<0000000060f2d14f>] __do_sys_kexec_file_load+0x17c/0x2c0
    [<000000008c86fe5a>] __s390x_sys_kexec_file_load+0x40/0x50
    [<000000001fdb9dac>] __do_syscall+0x1bc/0x1f0
    [<000000003ee4258d>] system_call+0x78/0xa0

Signed-off-by: Baoquan He <bhe@redhat.com>
Reviewed-by: Philipp Rudo <prudo@redhat.com>
Fixes: 99feaa717e55 ("s390/kexec_file: Create ipl report and pass to next kernel")
Cc: <stable@vger.kernel.org> # v5.2: 20c76e242e70: s390/kexec: fix return code handling
Cc: <stable@vger.kernel.org> # v5.2
Link: https://lore.kernel.org/r/20211116033101.GD21646@MiWiFi-R3L-srv
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2 years agos390/kexec: fix return code handling
Heiko Carstens [Tue, 16 Nov 2021 10:06:38 +0000 (11:06 +0100)]
s390/kexec: fix return code handling

kexec_file_add_ipl_report ignores that ipl_report_finish may fail and
can return an error pointer instead of a valid pointer.
Fix this and simplify by returning NULL in case of an error and let
the only caller handle this case.

Fixes: 99feaa717e55 ("s390/kexec_file: Create ipl report and pass to next kernel")
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2 years agos390/dump: fix copying to user-space of swapped kdump oldmem
Alexander Egorenkov [Mon, 15 Nov 2021 06:40:25 +0000 (07:40 +0100)]
s390/dump: fix copying to user-space of swapped kdump oldmem

This commit fixes a bug introduced by commit e9e7870f90e3 ("s390/dump:
introduce boot data 'oldmem_data'").
OLDMEM_BASE was mistakenly replaced by oldmem_data.size instead of
oldmem_data.start.

This bug caused the following error during kdump:
kdump.sh[878]: No program header covering vaddr 0x3434f5245found kexec bug?

Fixes: e9e7870f90e3 ("s390/dump: introduce boot data 'oldmem_data'")
Cc: stable@vger.kernel.org # 5.15+
Signed-off-by: Alexander Egorenkov <egorenar@linux.ibm.com>
Reviewed-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2 years agoperf evsel: Fix memory leaks relating to unit
Ian Rogers [Thu, 18 Nov 2021 08:47:49 +0000 (00:47 -0800)]
perf evsel: Fix memory leaks relating to unit

unit may have a strdup pointer or be to a literal, consequently memory
assocciated with it isn't freed. Change it so the unit is always strdup
and so the memory can be safely freed.

Fix related issue in perf_event__process_event_update() for name and
own_cpus. Leaks were spotted by leak sanitizer.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20211118084749.2191447-1-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 years agoperf report: Fix memory leaks around perf_tip()
Ian Rogers [Thu, 18 Nov 2021 07:38:04 +0000 (23:38 -0800)]
perf report: Fix memory leaks around perf_tip()

perf_tip() may allocate memory or use a literal, this means memory
wasn't freed if allocated. Change the API so that literals aren't used.

At the same time add missing frees for system_path. These issues were
spotted using leak sanitizer.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20211118073804.2149974-1-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 years agoperf hist: Fix memory leak of a perf_hpp_fmt
Ian Rogers [Thu, 18 Nov 2021 07:12:47 +0000 (23:12 -0800)]
perf hist: Fix memory leak of a perf_hpp_fmt

perf_hpp__column_unregister() removes an entry from a list but doesn't
free the memory causing a memory leak spotted by leak sanitizer.

Add the free while at the same time reducing the scope of the function
to static.

Signed-off-by: Ian Rogers <irogers@google.com>
Reviewed-by: Kajol Jain <kjain@linux.ibm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20211118071247.2140392-1-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 years agotools headers UAPI: Sync MIPS syscall table file changed by new futex_waitv syscall
Arnaldo Carvalho de Melo [Wed, 8 Sep 2021 19:09:08 +0000 (16:09 -0300)]
tools headers UAPI: Sync MIPS syscall table file changed by new futex_waitv syscall

To pick the changes in these csets:

  b3ff2881ba18b852 ("MIPS: syscalls: Wire up futex_waitv syscall")

That add support for this new syscall in tools such as 'perf trace'.

For instance, this is now possible (adapted from the x86_64 test output):

  # perf trace -e futex_waitv
  ^C#
  # perf trace -v -e futex_waitv
  event qualifier tracepoint filter: (common_pid != 807333 && common_pid != 3564) && (id == 449)
  ^C#
  # perf trace -v -e futex* --max-events 10
  event qualifier tracepoint filter: (common_pid != 812168 && common_pid != 3564) && (id == 202 || id == 449)
  mmap size 528384B
           ? (         ): Timer/219310  ... [continued]: futex())                                            = -1 ETIMEDOUT (Connection timed out)
       0.012 ( 0.002 ms): Timer/219310 futex(uaddr: 0x7fd0b152d3c8, op: WAKE|PRIVATE_FLAG, val: 1)           = 0
       0.024 ( 0.060 ms): Timer/219310 futex(uaddr: 0x7fd0b152d420, op: WAIT_BITSET|PRIVATE_FLAG, utime: 0x7fd0b1657840, val3: MATCH_ANY) = 0
       0.086 ( 0.001 ms): Timer/219310 futex(uaddr: 0x7fd0b152d3c8, op: WAKE|PRIVATE_FLAG, val: 1)           = 0
       0.088 (         ): Timer/219310 futex(uaddr: 0x7fd0b152d424, op: WAIT_BITSET|PRIVATE_FLAG, utime: 0x7fd0b1657840, val3: MATCH_ANY) ...
       0.075 ( 0.005 ms): Web Content/219299 futex(uaddr: 0x7fd0b152d420, op: WAKE|PRIVATE_FLAG, val: 1)     = 1
       0.169 ( 0.004 ms): Web Content/219299 futex(uaddr: 0x7fd0b152d424, op: WAKE|PRIVATE_FLAG, val: 1)     = 1
       0.088 ( 0.089 ms): Timer/219310  ... [continued]: futex())                                            = 0
       0.179 ( 0.001 ms): Timer/219310 futex(uaddr: 0x7fd0b152d3c8, op: WAKE|PRIVATE_FLAG, val: 1)           = 0
       0.181 (         ): Timer/219310 futex(uaddr: 0x7fd0b152d420, op: WAIT_BITSET|PRIVATE_FLAG, utime: 0x7fd0b1657840, val3: MATCH_ANY) ...
  #

That is the filter expression attached to the raw_syscalls:sys_{enter,exit}
tracepoints.

  $ grep futex_waitv tools/perf/arch/mips/entry/syscalls/syscall_n64.tbl
  449 n64 futex_waitv sys_futex_waitv
  $

This addresses these perf build warnings:

  Warning: Kernel ABI header at 'tools/perf/arch/mips/entry/syscalls/syscall_n64.tbl' differs from latest version at 'arch/mips/kernel/syscalls/syscall_n64.tbl'
  diff -u tools/perf/arch/mips/entry/syscalls/syscall_n64.tbl arch/mips/kernel/syscalls/syscall_n64.tbl

Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Wang Haojun <jiangliuer01@gmail.com>
Link: https://lore.kernel.org/lkml/YZZRxuIyvSGLZhM4@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 years agotools build: Fix removal of feature-sync-compare-and-swap feature detection
Arnaldo Carvalho de Melo [Wed, 17 Nov 2021 17:29:31 +0000 (14:29 -0300)]
tools build: Fix removal of feature-sync-compare-and-swap feature detection

The patch removing the feature-sync-compare-and-swap feature detection
didn't remove the call to main_test_sync_compare_and_swap(), making the
'test-all' case fail an all the feature tests to be performed
individually:

  $ cat /tmp/build/perf/feature/test-all.make.output
  In file included from test-all.c:18:
  test-libpython-version.c:5:10: error: #error
      5 |         #error
        |          ^~~~~
  test-all.c: In function ‘main’:
  test-all.c:203:9: error: implicit declaration of function ‘main_test_sync_compare_and_swap’ [-Werror=implicit-function-declaration]
    203 |         main_test_sync_compare_and_swap(argc, argv);
        |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  cc1: all warnings being treated as errors
  $

Fix it, now to figure out what is that test-libpython-version.c
problem...

Fixes: 60fa754b2a5a4e0c ("tools: Remove feature-sync-compare-and-swap feature detection")
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/lkml/YZU9Fe0sgkHSXeC2@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 years agoperf inject: Fix ARM SPE handling
German Gomez [Fri, 5 Nov 2021 10:41:30 +0000 (10:41 +0000)]
perf inject: Fix ARM SPE handling

'perf inject' is currently not working for Arm SPE. When you try to run
'perf inject' and 'perf report' with a perf.data file that contains SPE
traces, the tool reports a "Bad address" error:

  # ./perf record -e arm_spe_0/ts_enable=1,store_filter=1,branch_filter=1,load_filter=1/ -a -- sleep 1
  # ./perf inject -i perf.data -o perf.inject.data --itrace
  # ./perf report -i perf.inject.data --stdio

  0x42c00 [0x8]: failed to process type: 9 [Bad address]
  Error:
  failed to process sample

As far as I know, the issue was first spotted in [1], but 'perf inject'
was not yet injecting the samples. This patch does something similar to
what cs_etm does for injecting the samples [2], but for SPE.

[1] https://patchwork.kernel.org/project/linux-arm-kernel/cover/20210412091006.468557-1-leo.yan@linaro.org/#24117339
[2] https://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git/tree/tools/perf/util/cs-etm.c?h=perf/core&id=133fe2e617e48ca0948983329f43877064ffda3e#n1196

Reviewed-by: James Clark <james.clark@arm.com>
Signed-off-by: German Gomez <german.gomez@arm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Will Deacon <will@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20211105104130.28186-2-german.gomez@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 years agoperf bench: Fix two memory leaks detected with ASan
Sohaib Mohamed [Wed, 10 Nov 2021 02:20:11 +0000 (04:20 +0200)]
perf bench: Fix two memory leaks detected with ASan

ASan reports memory leaks while running:

  $ perf bench sched all

Fixes: e27454cc6352c422 ("perf bench: Add sched-messaging.c: Benchmark for scheduler and IPC mechanisms based on hackbench")
Signed-off-by: Sohaib Mohamed <sohaib.amhmd@gmail.com>
Acked-by: Ian Rogers <irogers@google.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Hitoshi Mitake <h.mitake@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Russel <rusty@rustcorp.com.au>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Pierre Gondois <pierre.gondois@arm.com>
Link: http://lore.kernel.org/lkml/20211110022012.16620-1-sohaib.amhmd@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 years agoperf test sample-parsing: Fix branch_stack entry endianness check
Thomas Richter [Wed, 17 Nov 2021 08:26:09 +0000 (09:26 +0100)]
perf test sample-parsing: Fix branch_stack entry endianness check

Commit 10269a2ca2b08cbd ("perf test sample-parsing: Add endian test for
struct branch_flags") broke the test case 27 (Sample parsing) on s390 on
linux-next tree:

  # perf test -Fv 27
  27: Sample parsing
  --- start ---
  parsing failed for sample_type 0x800
  ---- end ----
  Sample parsing: FAILED!
  #

The cause of the failure is a wrong #define BS_EXPECTED_BE statement in
above commit.  Correct this define and the test case runs fine.

Output After:

  # perf test -Fv 27
  27: Sample parsing                                                  :
  --- start ---
  ---- end ----
  Sample parsing: Ok
  #

Fixes: 10269a2ca2b08c ("perf test sample-parsing: Add endian test for struct branch_flags")
Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Tested-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Acked-by: Madhavan Srinivasan <maddy@linux.ibm.com>
CC: Sven Schnelle <svens@linux.ibm.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Sumanth Korikkar <sumanthk@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Link: https://lore.kernel.org/r/54077e81-503e-3405-6cb0-6541eb5532cc@linux.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 years agotools headers UAPI: Sync x86's asm/kvm.h with the kernel sources
Arnaldo Carvalho de Melo [Fri, 10 Sep 2021 14:46:54 +0000 (11:46 -0300)]
tools headers UAPI: Sync x86's asm/kvm.h with the kernel sources

To pick the changes in:

  828ca89628bfcb1b ("KVM: x86: Expose TSC offset controls to userspace")

That just rebuilds kvm-stat.c on x86, no change in functionality.

This silences these perf build warning:

  Warning: Kernel ABI header at 'tools/arch/x86/include/uapi/asm/kvm.h' differs from latest version at 'arch/x86/include/uapi/asm/kvm.h'
  diff -u tools/arch/x86/include/uapi/asm/kvm.h arch/x86/include/uapi/asm/kvm.h

Cc: Oliver Upton <oupton@google.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 years agoperf sort: Fix the 'p_stage_cyc' sort key behavior
Namhyung Kim [Fri, 5 Nov 2021 22:56:17 +0000 (15:56 -0700)]
perf sort: Fix the 'p_stage_cyc' sort key behavior

andle 'p_stage_cyc' (for pipeline stage cycles) sort key with the same
rationale as for the 'weight' and 'local_weight', see the fix in this
series for a full explanation.

Not sure it also needs the local and global variants.

But I couldn't test it actually because I don't have the machine.

Reviewed-by: Athira Jajeev <atrajeev@linux.vnet.ibm.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Athira Jajeev <atrajeev@linux.vnet.ibm.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Athira Jajeev <atrajeev@linux.vnet.ibm.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: https://lore.kernel.org/r/20211105225617.151364-3-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 years agoperf sort: Fix the 'ins_lat' sort key behavior
Namhyung Kim [Fri, 5 Nov 2021 22:56:16 +0000 (15:56 -0700)]
perf sort: Fix the 'ins_lat' sort key behavior

Handle 'ins_lat' (for instruction latency) and 'local_ins_lat' sort keys
with the same rationale as for the 'weight' and 'local_weight', see the
previous fix in this series for a full explanation.

But I couldn't test it actually, so only build tested.

Reviewed-by: Athira Jajeev <atrajeev@linux.vnet.ibm.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Athira Jajeev <atrajeev@linux.vnet.ibm.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Athira Jajeev <atrajeev@linux.vnet.ibm.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: https://lore.kernel.org/r/20211105225617.151364-2-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 years agoperf sort: Fix the 'weight' sort key behavior
Namhyung Kim [Fri, 5 Nov 2021 22:56:15 +0000 (15:56 -0700)]
perf sort: Fix the 'weight' sort key behavior

Currently, the 'weight' field in the perf sample has latency information
for some instructions like in memory accesses.  And perf tool has 'weight'
and 'local_weight' sort keys to display the info.

But it's somewhat confusing what it shows exactly.  In my understanding,
'local_weight' shows a weight in a single sample, and (global) 'weight'
shows a sum of the weights in the hist_entry.

For example:

  $ perf mem record -t load dd if=/dev/zero of=/dev/null bs=4k count=1M

  $ perf report --stdio -n -s +local_weight
  ...
  #
  # Overhead  Samples  Command  Shared Object     Symbol                     Local Weight
  # ........  .......  .......  ................  .........................  ............
  #
      21.23%      313  dd       [kernel.vmlinux]  [k] lockref_get_not_zero   32
      12.43%      183  dd       [kernel.vmlinux]  [k] lockref_get_not_zero   35
      11.97%      159  dd       [kernel.vmlinux]  [k] lockref_get_not_zero   36
      10.40%      141  dd       [kernel.vmlinux]  [k] lockref_put_return     32
       7.63%      113  dd       [kernel.vmlinux]  [k] lockref_get_not_zero   33
       6.37%       92  dd       [kernel.vmlinux]  [k] lockref_get_not_zero   34
       6.15%       90  dd       [kernel.vmlinux]  [k] lockref_put_return     33
  ...

So let's look at the 'lockref_get_not_zero' symbols.  The top entry
shows that 313 samples were captured with 'local_weight' 32, so the
total weight should be 313 x 32 = 10016.  But it's not the case:

  $ perf report --stdio -n -s +local_weight,weight -S lockref_get_not_zero
  ...
  #
  # Overhead  Samples  Command  Shared Object     Local Weight  Weight
  # ........  .......  .......  ................  ............  ......
  #
       1.36%        4  dd       [kernel.vmlinux]  36            144
       0.47%        4  dd       [kernel.vmlinux]  37            148
       0.42%        4  dd       [kernel.vmlinux]  32            128
       0.40%        4  dd       [kernel.vmlinux]  34            136
       0.35%        4  dd       [kernel.vmlinux]  36            144
       0.34%        4  dd       [kernel.vmlinux]  35            140
       0.30%        4  dd       [kernel.vmlinux]  36            144
       0.30%        4  dd       [kernel.vmlinux]  34            136
       0.30%        4  dd       [kernel.vmlinux]  32            128
       0.30%        4  dd       [kernel.vmlinux]  32            128
  ...

With the 'weight' sort key, it's divided to 4 samples even with the same
info ('comm', 'dso', 'sym' and 'local_weight').  I don't think this is
what we want.

I found this because of the way it aggregates the 'weight' value.  Since
it's not a period, we should not add them in the he->stat.  Otherwise,
two 32 'weight' entries will create a 64 'weight' entry.

After that, new 32 'weight' samples don't have a matching entry so it'd
create a new entry and make it a 64 'weight' entry again and again.
Later, they will be merged into 128 'weight' entries during the
hists__collapse_resort() with 4 samples, multiple times like above.

Let's keep the weight and display it differently.  For 'local_weight',
it can show the weight as is, and for (global) 'weight' it can display
the number multiplied by the number of samples.

With this change, I can see the expected numbers.

  $ perf report --stdio -n -s +local_weight,weight -S lockref_get_not_zero
  ...
  #
  # Overhead  Samples  Command  Shared Object     Local Weight  Weight
  # ........  .......  .......  ................  ............  .....
  #
      21.23%      313  dd       [kernel.vmlinux]  32            10016
      12.43%      183  dd       [kernel.vmlinux]  35            6405
      11.97%      159  dd       [kernel.vmlinux]  36            5724
       7.63%      113  dd       [kernel.vmlinux]  33            3729
       6.37%       92  dd       [kernel.vmlinux]  34            3128
       4.17%       59  dd       [kernel.vmlinux]  37            2183
       0.08%        1  dd       [kernel.vmlinux]  269           269
       0.08%        1  dd       [kernel.vmlinux]  38            38

Reviewed-by: Athira Jajeev <atrajeev@linux.vnet.ibm.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Athira Jajeev <atrajeev@linux.vnet.ibm.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: https://lore.kernel.org/r/20211105225617.151364-1-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 years agoperf tools: Set COMPAT_NEED_REALLOCARRAY for CONFIG_AUXTRACE=1
Arnaldo Carvalho de Melo [Tue, 16 Nov 2021 17:44:17 +0000 (14:44 -0300)]
perf tools: Set COMPAT_NEED_REALLOCARRAY for CONFIG_AUXTRACE=1

As it is being used in tools/perf/arch/arm64/util/arm-spe.c and the
COMPAT_NEED_REALLOCARRAY was only being set when CORESIGHT=1 is set.

Fixes: 56c31cdff7c2a640 ("perf arm-spe: Implement find_snapshot callback")
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: German Gomez <german.gomez@arm.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/all/YZT63mIc7iY01er3@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 years agoperf tests wp: Remove unused functions on s390
Arnaldo Carvalho de Melo [Tue, 16 Nov 2021 16:02:52 +0000 (13:02 -0300)]
perf tests wp: Remove unused functions on s390

Fixing these build problems:

  tests/wp.c:24:12: error: 'wp_read' defined but not used [-Werror=unused-function]
   static int wp_read(int fd, long long *count, int size)
              ^
  tests/wp.c:35:13: error: 'get__perf_event_attr' defined but not used [-Werror=unused-function]
   static void get__perf_event_attr(struct perf_event_attr *attr, int wp_type,
               ^
    CC      /tmp/build/perf/util/print_binary.o

Fixes: e47c6ecaae1df54a ("perf test: Convert watch point tests to test cases.")
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Brendan Higgins <brendanhiggins@google.com>
Cc: Daniel Latypov <dlatypov@google.com>
Cc: David Gow <davidgow@google.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sohaib Mohamed <sohaib.amhmd@gmail.com>
Cc: Stephane Eranian <eranian@google.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 years agotools headers UAPI: Sync linux/kvm.h with the kernel sources
Arnaldo Carvalho de Melo [Sun, 9 May 2021 12:39:02 +0000 (09:39 -0300)]
tools headers UAPI: Sync linux/kvm.h with the kernel sources

To pick the changes in:

  b56639318bb2be66 ("KVM: SEV: Add support for SEV intra host migration")
  e615e355894e6197 ("KVM: x86: On emulation failure, convey the exit reason, etc. to userspace")
  a9d496d8e08ca1eb ("KVM: x86: Clarify the kvm_run.emulation_failure structure layout")
  c68dc1b577eabd56 ("KVM: x86: Report host tsc and realtime values in KVM_GET_CLOCK")
  dea8ee31a0392775 ("RISC-V: KVM: Add SBI v0.1 support")

That just rebuilds perf, as these patches don't add any new KVM ioctl to
be harvested for the the 'perf trace' ioctl syscall argument
beautifiers.

This is also by now used by tools/testing/selftests/kvm/, a simple test
build succeeded.

This silences this perf build warning:

  Warning: Kernel ABI header at 'tools/include/uapi/linux/kvm.h' differs from latest version at 'include/uapi/linux/kvm.h'
  diff -u tools/include/uapi/linux/kvm.h include/uapi/linux/kvm.h

Cc: Anup Patel <anup@brainfault.org>
Cc: Atish Patra <atish.patra@wdc.com>
Cc: David Edmondson <david.edmondson@oracle.com>
Cc: Oliver Upton <oupton@google.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Gonda <pgonda@google.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 years agotools headers cpufeatures: Sync with the kernel sources
Arnaldo Carvalho de Melo [Thu, 1 Jul 2021 16:39:15 +0000 (13:39 -0300)]
tools headers cpufeatures: Sync with the kernel sources

To pick the changes from:

  eec2113eabd92b7b ("x86/fpu/amx: Define AMX state components and have it used for boot-time checks")

This only causes these perf files to be rebuilt:

  CC       /tmp/build/perf/bench/mem-memcpy-x86-64-asm.o
  CC       /tmp/build/perf/bench/mem-memset-x86-64-asm.o

And addresses this perf build warning:

  Warning: Kernel ABI header at 'tools/arch/x86/include/asm/cpufeatures.h' differs from latest version at 'arch/x86/include/asm/cpufeatures.h'
  diff -u tools/arch/x86/include/asm/cpufeatures.h arch/x86/include/asm/cpufeatures.h

Cc: Borislav Petkov <bp@suse.de>
Cc: Chang S. Bae <chang.seok.bae@intel.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 years agoptp: ocp: Fix a couple NULL vs IS_ERR() checks
Dan Carpenter [Thu, 18 Nov 2021 11:22:11 +0000 (14:22 +0300)]
ptp: ocp: Fix a couple NULL vs IS_ERR() checks

The ptp_ocp_get_mem() function does not return NULL, it returns error
pointers.

Fixes: 773bda964921 ("ptp: ocp: Expose various resources on the timecard.")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: ethernet: dec: tulip: de4x5: fix possible array overflows in type3_infoblock()
Teng Qi [Thu, 18 Nov 2021 07:01:18 +0000 (15:01 +0800)]
net: ethernet: dec: tulip: de4x5: fix possible array overflows in type3_infoblock()

The definition of macro MOTO_SROM_BUG is:
  #define MOTO_SROM_BUG    (lp->active == 8 && (get_unaligned_le32(
  dev->dev_addr) & 0x00ffffff) == 0x3e0008)

and the if statement
  if (MOTO_SROM_BUG) lp->active = 0;

using this macro indicates lp->active could be 8. If lp->active is 8 and
the second comparison of this macro is false. lp->active will remain 8 in:
  lp->phy[lp->active].gep = (*p ? p : NULL); p += (2 * (*p) + 1);
  lp->phy[lp->active].rst = (*p ? p : NULL); p += (2 * (*p) + 1);
  lp->phy[lp->active].mc  = get_unaligned_le16(p); p += 2;
  lp->phy[lp->active].ana = get_unaligned_le16(p); p += 2;
  lp->phy[lp->active].fdx = get_unaligned_le16(p); p += 2;
  lp->phy[lp->active].ttm = get_unaligned_le16(p); p += 2;
  lp->phy[lp->active].mci = *p;

However, the length of array lp->phy is 8, so array overflows can occur.
To fix these possible array overflows, we first check lp->active and then
return -EINVAL if it is greater or equal to ARRAY_SIZE(lp->phy) (i.e. 8).

Reported-by: TOTE Robot <oslab@tsinghua.edu.cn>
Signed-off-by: Teng Qi <starmiku1207184332@gmail.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: tulip: de4x5: fix the problem that the array 'lp->phy[8]' may be out of bound
zhangyue [Thu, 18 Nov 2021 05:46:32 +0000 (13:46 +0800)]
net: tulip: de4x5: fix the problem that the array 'lp->phy[8]' may be out of bound

In line 5001, if all id in the array 'lp->phy[8]' is not 0, when the
'for' end, the 'k' is 8.

At this time, the array 'lp->phy[8]' may be out of bound.

Signed-off-by: zhangyue <zhangyue1@kylinos.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoMerge branch '40GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/net-
David S. Miller [Thu, 18 Nov 2021 11:48:33 +0000 (11:48 +0000)]
Merge branch '40GbE' of git://git./linux/kernel/git/tnguy/net-
queue

Tony Nguyen says:

====================
Intel Wired LAN Driver Updates 2021-11-17

This series contains updates to i40e driver only.

Eryk adds accounting for VLAN header in packet size when VF port VLAN is
configured. He also fixes TC queue distribution when the user has changed
queue counts as well as for configuration of VF ADQ which caused dropped
packets.

Michal adds tracking for when a VSI is being released to prevent null
pointer dereference when managing filters.

Karen ensures PF successfully initiates VF requested reset which could
cause a call trace otherwise.

Jedrzej moves validation of channel queue value earlier to prevent
partial configuration when the value is invalid.

Grzegorz corrects the reported error when adding filter fails.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoipv6: check return value of ipv6_skip_exthdr
Jordy Zomer [Wed, 17 Nov 2021 19:06:48 +0000 (20:06 +0100)]
ipv6: check return value of ipv6_skip_exthdr

The offset value is used in pointer math on skb->data.
Since ipv6_skip_exthdr may return -1 the pointer to uh and th
may not point to the actual udp and tcp headers and potentially
overwrite other stuff. This is why I think this should be checked.

EDIT:  added {}'s, thanks Kees

Signed-off-by: Jordy Zomer <jordy@pwning.systems>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoe100: fix device suspend/resume
Jesse Brandeburg [Wed, 17 Nov 2021 20:59:52 +0000 (12:59 -0800)]
e100: fix device suspend/resume

As reported in [1], e100 was no longer working for suspend/resume
cycles. The previous commit mentioned in the fixes appears to have
broken things and this attempts to practice best known methods for
device power management and keep wake-up working while allowing
suspend/resume to work. To do this, I reorder a little bit of code
and fix the resume path to make sure the device is enabled.

[1] https://bugzilla.kernel.org/show_bug.cgi?id=214933

Fixes: 69a74aef8a18 ("e100: use generic power management")
Cc: Vaibhav Gupta <vaibhavgupta40@gmail.com>
Reported-by: Alexey Kuznetsov <axet@me.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Alexey Kuznetsov <axet@me.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agodevlink: Don't throw an error if flash notification sent before devlink visible
Leon Romanovsky [Wed, 17 Nov 2021 14:49:09 +0000 (16:49 +0200)]
devlink: Don't throw an error if flash notification sent before devlink visible

The mlxsw driver calls to various devlink flash routines even before
users can get any access to the devlink instance itself. For example,
mlxsw_core_fw_rev_validate() one of such functions.

__mlxsw_core_bus_device_register
 -> mlxsw_core_fw_rev_validate
  -> mlxsw_core_fw_flash
   -> mlxfw_firmware_flash
    -> mlxfw_status_notify
     -> devlink_flash_update_status_notify
      -> __devlink_flash_update_notify
       -> WARN_ON(...)

It causes to the WARN_ON to trigger warning about devlink not registered.

Fixes: cf530217408e ("devlink: Notify users when objects are accessible")
Reported-by: Danielle Ratson <danieller@nvidia.com>
Tested-by: Danielle Ratson <danieller@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Acked-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agopage_pool: Revert "page_pool: disable dma mapping support..."
Yunsheng Lin [Wed, 17 Nov 2021 07:56:52 +0000 (15:56 +0800)]
page_pool: Revert "page_pool: disable dma mapping support..."

This reverts commit d00e60ee54b12de945b8493cf18c1ada9e422514.

As reported by Guillaume in [1]:
Enabling LPAE always enables CONFIG_ARCH_DMA_ADDR_T_64BIT
in 32-bit systems, which breaks the bootup proceess when a
ethernet driver is using page pool with PP_FLAG_DMA_MAP flag.
As we were hoping we had no active consumers for such system
when we removed the dma mapping support, and LPAE seems like
a common feature for 32 bits system, so revert it.

1. https://www.spinics.net/lists/netdev/msg779890.html

Fixes: d00e60ee54b1 ("page_pool: disable dma mapping support for 32-bit arch with 64-bit DMA")
Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Reported-by: "kernelci.org bot" <bot@kernelci.org>
Tested-by: "kernelci.org bot" <bot@kernelci.org>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoethernet: hisilicon: hns: hns_dsaf_misc: fix a possible array overflow in hns_dsaf_ge...
Teng Qi [Wed, 17 Nov 2021 03:44:53 +0000 (11:44 +0800)]
ethernet: hisilicon: hns: hns_dsaf_misc: fix a possible array overflow in hns_dsaf_ge_srst_by_port()

The if statement:
  if (port >= DSAF_GE_NUM)
        return;

limits the value of port less than DSAF_GE_NUM (i.e., 8).
However, if the value of port is 6 or 7, an array overflow could occur:
  port_rst_off = dsaf_dev->mac_cb[port]->port_rst_off;

because the length of dsaf_dev->mac_cb is DSAF_MAX_PORT_NUM (i.e., 6).

To fix this possible array overflow, we first check port and if it is
greater than or equal to DSAF_MAX_PORT_NUM, the function returns.

Reported-by: TOTE Robot <oslab@tsinghua.edu.cn>
Signed-off-by: Teng Qi <starmiku1207184332@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoMerge branch 'rework/printk_safe-removal' into for-linus
Petr Mladek [Thu, 18 Nov 2021 09:03:47 +0000 (10:03 +0100)]
Merge branch 'rework/printk_safe-removal' into for-linus

2 years agoparisc: Enable CONFIG_PRINTK_TIME=y in 32bit defconfig
Helge Deller [Wed, 17 Nov 2021 14:48:45 +0000 (15:48 +0100)]
parisc: Enable CONFIG_PRINTK_TIME=y in 32bit defconfig

Signed-off-by: Helge Deller <deller@gmx.de>
2 years agoRevert "parisc: Reduce sigreturn trampoline to 3 instructions"
Helge Deller [Wed, 17 Nov 2021 10:05:07 +0000 (11:05 +0100)]
Revert "parisc: Reduce sigreturn trampoline to 3 instructions"

This reverts commit e4f2006f1287e7ea17660490569cff323772dac4.

This patch shows problems with signal handling. Revert it for now.

Signed-off-by: Helge Deller <deller@gmx.de>
Cc: <stable@vger.kernel.org> # v5.15
2 years agoparisc: Wrap assembler related defines inside __ASSEMBLY__
Helge Deller [Tue, 16 Nov 2021 12:12:21 +0000 (13:12 +0100)]
parisc: Wrap assembler related defines inside __ASSEMBLY__

Building allmodconfig shows errors in the gpu/drm/msm snapdragon drivers,
because a COND() define is used there which conflicts with the COND() for
PA-RISC assembly.  Although the snapdragon driver isn't relevant for parisc, it
is nevertheless compiled when CONFIG_COMPILE_TEST is defined.

Move the COND() define and other PA-RISC mnemonics inside the #ifdef
__ASSEMBLY__ part to avoid this conflict.

Signed-off-by: Helge Deller <deller@gmx.de>
Reported-by: kernel test robot <lkp@intel.com>
2 years agoparisc: Wire up futex_waitv
Helge Deller [Tue, 16 Nov 2021 12:11:26 +0000 (13:11 +0100)]
parisc: Wire up futex_waitv

Signed-off-by: Helge Deller <deller@gmx.de>
2 years agoparisc: Include stringify.h to avoid build error in crypto/api.c
Helge Deller [Mon, 15 Nov 2021 16:34:50 +0000 (17:34 +0100)]
parisc: Include stringify.h to avoid build error in crypto/api.c

Include stringify.h to avoid this build error:
 arch/parisc/include/asm/jump_label.h: error: expected ':' before '__stringify'
 arch/parisc/include/asm/jump_label.h: error: label 'l_yes' defined but not used [-Werror=unused-label]

Signed-off-by: Helge Deller <deller@gmx.de>
Reported-by: kernel test robot <lkp@intel.com>
2 years agoALSA: hda/realtek: Fix LED on HP ProBook 435 G7
Takashi Iwai [Thu, 18 Nov 2021 07:16:36 +0000 (08:16 +0100)]
ALSA: hda/realtek: Fix LED on HP ProBook 435 G7

HP ProBook 435 G7 (SSID 103c:8735) needs the similar quirk as another
HP ProBook for enabling the mute and the mic-mute LEDs.

BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=215021
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20211118071636.14738-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2 years agoKVM: x86: Cap KVM_CAP_NR_VCPUS by KVM_CAP_MAX_VCPUS
Vitaly Kuznetsov [Tue, 16 Nov 2021 16:34:43 +0000 (17:34 +0100)]
KVM: x86: Cap KVM_CAP_NR_VCPUS by KVM_CAP_MAX_VCPUS

It doesn't make sense to return the recommended maximum number of
vCPUs which exceeds the maximum possible number of vCPUs.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20211116163443.88707-7-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoKVM: s390: Cap KVM_CAP_NR_VCPUS by num_online_cpus()
Vitaly Kuznetsov [Tue, 16 Nov 2021 16:34:42 +0000 (17:34 +0100)]
KVM: s390: Cap KVM_CAP_NR_VCPUS by num_online_cpus()

KVM_CAP_NR_VCPUS is a legacy advisory value which on other architectures
return num_online_cpus() caped by KVM_CAP_NR_VCPUS or something else
(ppc and arm64 are special cases). On s390, KVM_CAP_NR_VCPUS returns
the same as KVM_CAP_MAX_VCPUS and this may turn out to be a bad
'advice'. Switch s390 to returning caped num_online_cpus() too.

Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Message-Id: <20211116163443.88707-6-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoKVM: RISC-V: Cap KVM_CAP_NR_VCPUS by KVM_CAP_MAX_VCPUS
Vitaly Kuznetsov [Tue, 16 Nov 2021 16:34:41 +0000 (17:34 +0100)]
KVM: RISC-V: Cap KVM_CAP_NR_VCPUS by KVM_CAP_MAX_VCPUS

It doesn't make sense to return the recommended maximum number of
vCPUs which exceeds the maximum possible number of vCPUs.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Acked-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
Message-Id: <20211116163443.88707-5-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoKVM: PPC: Cap KVM_CAP_NR_VCPUS by KVM_CAP_MAX_VCPUS
Vitaly Kuznetsov [Tue, 16 Nov 2021 16:34:40 +0000 (17:34 +0100)]
KVM: PPC: Cap KVM_CAP_NR_VCPUS by KVM_CAP_MAX_VCPUS

It doesn't make sense to return the recommended maximum number of
vCPUs which exceeds the maximum possible number of vCPUs.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20211116163443.88707-4-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoKVM: MIPS: Cap KVM_CAP_NR_VCPUS by KVM_CAP_MAX_VCPUS
Vitaly Kuznetsov [Tue, 16 Nov 2021 16:34:39 +0000 (17:34 +0100)]
KVM: MIPS: Cap KVM_CAP_NR_VCPUS by KVM_CAP_MAX_VCPUS

It doesn't make sense to return the recommended maximum number of
vCPUs which exceeds the maximum possible number of vCPUs.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20211116163443.88707-3-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoKVM: arm64: Cap KVM_CAP_NR_VCPUS by kvm_arm_default_max_vcpus()
Vitaly Kuznetsov [Tue, 16 Nov 2021 16:34:38 +0000 (17:34 +0100)]
KVM: arm64: Cap KVM_CAP_NR_VCPUS by kvm_arm_default_max_vcpus()

Generally, it doesn't make sense to return the recommended maximum number
of vCPUs which exceeds the maximum possible number of vCPUs.

Note: ARM64 is special as the value returned by KVM_CAP_MAX_VCPUS differs
depending on whether it is a system-wide ioctl or a per-VM one. Previously,
KVM_CAP_NR_VCPUS didn't have this difference and it seems preferable to
keep the status quo. Cap KVM_CAP_NR_VCPUS by kvm_arm_default_max_vcpus()
which is what gets returned by system-wide KVM_CAP_MAX_VCPUS.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20211116163443.88707-2-vkuznets@redhat.com>
Acked-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoKVM: x86: Assume a 64-bit hypercall for guests with protected state
Tom Lendacky [Mon, 24 May 2021 17:48:57 +0000 (12:48 -0500)]
KVM: x86: Assume a 64-bit hypercall for guests with protected state

When processing a hypercall for a guest with protected state, currently
SEV-ES guests, the guest CS segment register can't be checked to
determine if the guest is in 64-bit mode. For an SEV-ES guest, it is
expected that communication between the guest and the hypervisor is
performed to shared memory using the GHCB. In order to use the GHCB, the
guest must have been in long mode, otherwise writes by the guest to the
GHCB would be encrypted and not be able to be comprehended by the
hypervisor.

Create a new helper function, is_64_bit_hypercall(), that assumes the
guest is in 64-bit mode when the guest has protected state, and returns
true, otherwise invoking is_64_bit_mode() to determine the mode. Update
the hypercall related routines to use is_64_bit_hypercall() instead of
is_64_bit_mode().

Add a WARN_ON_ONCE() to is_64_bit_mode() to catch occurences of calls to
this helper function for a guest running with protected state.

Fixes: f1c6366e3043 ("KVM: SVM: Add required changes to support intercepts under SEV-ES")
Reported-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Message-Id: <e0b20c770c9d0d1403f23d83e785385104211f74.1621878537.git.thomas.lendacky@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoselftests: KVM: Add /x86_64/sev_migrate_tests to .gitignore
Arnaldo Carvalho de Melo [Tue, 16 Nov 2021 15:03:25 +0000 (12:03 -0300)]
selftests: KVM: Add /x86_64/sev_migrate_tests to .gitignore

  $ git status
  nothing to commit, working tree clean
  $
  $ make -C tools/testing/selftests/kvm/ > /dev/null 2>&1
  $ git status

  Untracked files:
    (use "git add <file>..." to include in what will be committed)
   tools/testing/selftests/kvm/x86_64/sev_migrate_tests

  nothing added to commit but untracked files present (use "git add" to track)
  $

Fixes: 6a58150859fdec76 ("selftest: KVM: Add intra host migration tests")
Cc: Brijesh Singh <brijesh.singh@amd.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Marc Orr <marcorr@google.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Gonda <pgonda@google.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Message-Id: <YZPIPfvYgRDCZi/w@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoriscv: kvm: fix non-kernel-doc comment block
Randy Dunlap [Sun, 7 Nov 2021 03:47:06 +0000 (20:47 -0700)]
riscv: kvm: fix non-kernel-doc comment block

Don't use "/**" to begin a comment block for a non-kernel-doc comment.

Prevents this docs build warning:

vcpu_sbi.c:3: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
 * Copyright (c) 2019 Western Digital Corporation or its affiliates.

Fixes: dea8ee31a039 ("RISC-V: KVM: Add SBI v0.1 support")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reported-by: kernel test robot <lkp@intel.com>
Cc: Atish Patra <atish.patra@wdc.com>
Cc: Anup Patel <anup.patel@wdc.com>
Cc: kvm@vger.kernel.org
Cc: kvm-riscv@lists.infradead.org
Cc: linux-riscv@lists.infradead.org
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Message-Id: <20211107034706.30672-1-rdunlap@infradead.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoMerge branch 'kvm-5.16-fixes' into kvm-master
Paolo Bonzini [Tue, 16 Nov 2021 13:08:19 +0000 (08:08 -0500)]
Merge branch 'kvm-5.16-fixes' into kvm-master

* Fixes for Xen emulation

* Kill kvm_map_gfn() / kvm_unmap_gfn() and broken gfn_to_pfn_cache

* Fixes for migration of 32-bit nested guests on 64-bit hypervisor

* Compilation fixes

* More SEV cleanups

2 years agoKVM: SEV: Fix typo in and tweak name of cmd_allowed_from_miror()
Sean Christopherson [Tue, 9 Nov 2021 21:51:01 +0000 (21:51 +0000)]
KVM: SEV: Fix typo in and tweak name of cmd_allowed_from_miror()

Rename cmd_allowed_from_miror() to is_cmd_allowed_from_mirror(), fixing
a typo and making it obvious that the result is a boolean where
false means "not allowed".

No functional change intended.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20211109215101.2211373-7-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoKVM: SEV: Drop a redundant setting of sev->asid during initialization
Sean Christopherson [Tue, 9 Nov 2021 21:51:00 +0000 (21:51 +0000)]
KVM: SEV: Drop a redundant setting of sev->asid during initialization

Remove a fully redundant write to sev->asid during SEV/SEV-ES guest
initialization.  The ASID is set a few lines earlier prior to the call to
sev_platform_init(), which doesn't take "sev" as a param, i.e. can't
muck with the ASID barring some truly magical behind-the-scenes code.

No functional change intended.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20211109215101.2211373-6-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoKVM: SEV: WARN if SEV-ES is marked active but SEV is not
Sean Christopherson [Tue, 9 Nov 2021 21:50:59 +0000 (21:50 +0000)]
KVM: SEV: WARN if SEV-ES is marked active but SEV is not

WARN if the VM is tagged as SEV-ES but not SEV.  KVM relies on SEV and
SEV-ES being set atomically, and guards common flows with "is SEV", i.e.
observing SEV-ES without SEV means KVM has a fatal bug.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20211109215101.2211373-5-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoKVM: SEV: Set sev_info.active after initial checks in sev_guest_init()
Sean Christopherson [Tue, 9 Nov 2021 21:50:58 +0000 (21:50 +0000)]
KVM: SEV: Set sev_info.active after initial checks in sev_guest_init()

Set sev_info.active during SEV/SEV-ES activation before calling any code
that can potentially consume sev_info.es_active, e.g. set "active" and
"es_active" as a pair immediately after the initial sanity checks.  KVM
generally expects that es_active can be true if and only if active is
true, e.g. sev_asid_new() deliberately avoids sev_es_guest() so that it
doesn't get a false negative.  This will allow WARNing in sev_es_guest()
if the VM is tagged as SEV-ES but not SEV.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20211109215101.2211373-4-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoKVM: SEV: Disallow COPY_ENC_CONTEXT_FROM if target has created vCPUs
Sean Christopherson [Tue, 9 Nov 2021 21:50:56 +0000 (21:50 +0000)]
KVM: SEV: Disallow COPY_ENC_CONTEXT_FROM if target has created vCPUs

Reject COPY_ENC_CONTEXT_FROM if the destination VM has created vCPUs.
KVM relies on SEV activation to occur before vCPUs are created, e.g. to
set VMCB flags and intercepts correctly.

Fixes: 54526d1fd593 ("KVM: x86: Support KVM VMs sharing SEV context")
Cc: stable@vger.kernel.org
Cc: Peter Gonda <pgonda@google.com>
Cc: Marc Orr <marcorr@google.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Nathan Tempelman <natet@google.com>
Cc: Brijesh Singh <brijesh.singh@amd.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20211109215101.2211373-2-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoKVM: Kill kvm_map_gfn() / kvm_unmap_gfn() and gfn_to_pfn_cache
David Woodhouse [Mon, 15 Nov 2021 16:50:27 +0000 (16:50 +0000)]
KVM: Kill kvm_map_gfn() / kvm_unmap_gfn() and gfn_to_pfn_cache

In commit 7e2175ebd695 ("KVM: x86: Fix recording of guest steal time /
preempted status") I removed the only user of these functions because
it was basically impossible to use them safely.

There are two stages to the GFN->PFN mapping; first through the KVM
memslots to a userspace HVA and then through the page tables to
translate that HVA to an underlying PFN. Invalidations of the former
were being handled correctly, but no attempt was made to use the MMU
notifiers to invalidate the cache when the HVA->GFN mapping changed.

As a prelude to reinventing the gfn_to_pfn_cache with more usable
semantics, rip it out entirely and untangle the implementation of
the unsafe kvm_vcpu_map()/kvm_vcpu_unmap() functions from it.

All current users of kvm_vcpu_map() also look broken right now, and
will be dealt with separately. They broadly fall into two classes:

* Those which map, access the data and immediately unmap. This is
  mostly gratuitous and could just as well use the existing user
  HVA, and could probably benefit from a gfn_to_hva_cache as they
  do so.

* Those which keep the mapping around for a longer time, perhaps
  even using the PFN directly from the guest. These will need to
  be converted to the new gfn_to_pfn_cache and then kvm_vcpu_map()
  can be removed too.

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Message-Id: <20211115165030.7422-8-dwmw2@infradead.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoKVM: nVMX: Use a gfn_to_hva_cache for vmptrld
David Woodhouse [Mon, 15 Nov 2021 16:50:26 +0000 (16:50 +0000)]
KVM: nVMX: Use a gfn_to_hva_cache for vmptrld

And thus another call to kvm_vcpu_map() can die.

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Message-Id: <20211115165030.7422-7-dwmw2@infradead.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoKVM: nVMX: Use kvm_read_guest_offset_cached() for nested VMCS check
David Woodhouse [Mon, 15 Nov 2021 16:50:25 +0000 (16:50 +0000)]
KVM: nVMX: Use kvm_read_guest_offset_cached() for nested VMCS check

Kill another mostly gratuitous kvm_vcpu_map() which could just use the
userspace HVA for it.

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Message-Id: <20211115165030.7422-6-dwmw2@infradead.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoKVM: x86/xen: Use sizeof_field() instead of open-coding it
David Woodhouse [Mon, 15 Nov 2021 16:50:23 +0000 (16:50 +0000)]
KVM: x86/xen: Use sizeof_field() instead of open-coding it

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Message-Id: <20211115165030.7422-4-dwmw2@infradead.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoKVM: nVMX: Use kvm_{read,write}_guest_cached() for shadow_vmcs12
David Woodhouse [Mon, 15 Nov 2021 16:50:24 +0000 (16:50 +0000)]
KVM: nVMX: Use kvm_{read,write}_guest_cached() for shadow_vmcs12

Using kvm_vcpu_map() for reading from the guest is entirely gratuitous,
when all we do is a single memcpy and unmap it again. Fix it up to use
kvm_read_guest()... but in fact I couldn't bring myself to do that
without also making it use a gfn_to_hva_cache for both that *and* the
copy in the other direction.

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Message-Id: <20211115165030.7422-5-dwmw2@infradead.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoKVM: x86/xen: Fix get_attr of KVM_XEN_ATTR_TYPE_SHARED_INFO
David Woodhouse [Mon, 15 Nov 2021 16:50:21 +0000 (16:50 +0000)]
KVM: x86/xen: Fix get_attr of KVM_XEN_ATTR_TYPE_SHARED_INFO

In commit 319afe68567b ("KVM: xen: do not use struct gfn_to_hva_cache") we
stopped storing this in-kernel as a GPA, and started storing it as a GFN.
Which means we probably should have stopped calling gpa_to_gfn() on it
when userspace asks for it back.

Cc: stable@vger.kernel.org
Fixes: 319afe68567b ("KVM: xen: do not use struct gfn_to_hva_cache")
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Message-Id: <20211115165030.7422-2-dwmw2@infradead.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoKVM: x86/mmu: include EFER.LMA in extended mmu role
Maxim Levitsky [Mon, 15 Nov 2021 13:18:37 +0000 (15:18 +0200)]
KVM: x86/mmu: include EFER.LMA in extended mmu role

Incorporate EFER.LMA into kvm_mmu_extended_role, as it used to compute the
guest root level and is not reflected in kvm_mmu_page_role.level when TDP
is in use.  When simply running the guest, it is impossible for EFER.LMA
and kvm_mmu.root_level to get out of sync, as the guest cannot transition
from PAE paging to 64-bit paging without toggling CR0.PG, i.e. without
first bouncing through a different MMU context.  And stuffing guest state
via KVM_SET_SREGS{,2} also ensures a full MMU context reset.

However, if KVM_SET_SREGS{,2} is followed by KVM_SET_NESTED_STATE, e.g. to
set guest state when migrating the VM while L2 is active, the vCPU state
will reflect L2, not L1.  If L1 is using TDP for L2, then root_mmu will
have been configured using L2's state, despite not being used for L2.  If
L2.EFER.LMA != L1.EFER.LMA, and L2 is using PAE paging, then root_mmu will
be configured for guest PAE paging, but will match the mmu_role for 64-bit
paging and cause KVM to not reconfigure root_mmu on the next nested VM-Exit.

Alternatively, the root_mmu's role could be invalidated after a successful
KVM_SET_NESTED_STATE that yields vcpu->arch.mmu != vcpu->arch.root_mmu,
i.e. that switches the active mmu to guest_mmu, but doing so is unnecessarily
tricky, and not even needed if L1 and L2 do have the same role (e.g., they
are both 64-bit guests and run with the same CR4).

Suggested-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <20211115131837.195527-3-mlevitsk@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoKVM: nVMX: don't use vcpu->arch.efer when checking host state on nested state load
Maxim Levitsky [Mon, 15 Nov 2021 13:18:36 +0000 (15:18 +0200)]
KVM: nVMX: don't use vcpu->arch.efer when checking host state on nested state load

When loading nested state, don't use check vcpu->arch.efer to get the
L1 host's 64-bit vs. 32-bit state and don't check it for consistency
with respect to VM_EXIT_HOST_ADDR_SPACE_SIZE, as register state in vCPU
may be stale when KVM_SET_NESTED_STATE is called---and architecturally
does not exist.  When restoring L2 state in KVM, the CPU is placed in
non-root where nested VMX code has no snapshot of L1 host state: VMX
(conditionally) loads host state fields loaded on VM-exit, but they need
not correspond to the state before entry.  A simple case occurs in KVM
itself, where the host RIP field points to vmx_vmexit rather than the
instruction following vmlaunch/vmresume.

However, for the particular case of L1 being in 32- or 64-bit mode
on entry, the exit controls can be treated instead as the source of
truth regarding the state of L1 on entry, and can be used to check
that vmcs12.VM_EXIT_HOST_ADDR_SPACE_SIZE matches vmcs12.HOST_EFER if
vmcs12.VM_EXIT_LOAD_IA32_EFER is set.  The consistency check on CPU
EFER vs. vmcs12.VM_EXIT_HOST_ADDR_SPACE_SIZE, instead, happens only
on VM-Enter.  That's because, again, there's conceptually no "current"
L1 EFER to check on KVM_SET_NESTED_STATE.

Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <20211115131837.195527-2-mlevitsk@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoKVM: Fix steal time asm constraints
David Woodhouse [Sun, 14 Nov 2021 08:59:02 +0000 (08:59 +0000)]
KVM: Fix steal time asm constraints

In 64-bit mode, x86 instruction encoding allows us to use the low 8 bits
of any GPR as an 8-bit operand. In 32-bit mode, however, we can only use
the [abcd] registers. For which, GCC has the "q" constraint instead of
the less restrictive "r".

Also fix st->preempted, which is an input/output operand rather than an
input.

Fixes: 7e2175ebd695 ("KVM: x86: Fix recording of guest steal time / preempted status")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Message-Id: <89bf72db1b859990355f9c40713a34e0d2d86c98.camel@infradead.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agocpuid: kvm_find_kvm_cpuid_features() should be declared 'static'
Paul Durrant [Mon, 15 Nov 2021 14:41:31 +0000 (14:41 +0000)]
cpuid: kvm_find_kvm_cpuid_features() should be declared 'static'

The lack a static declaration currently results in:

arch/x86/kvm/cpuid.c:128:26: warning: no previous prototype for function 'kvm_find_kvm_cpuid_features'

when compiling with "W=1".

Reported-by: kernel test robot <lkp@intel.com>
Fixes: 760849b1476c ("KVM: x86: Make sure KVM_CPUID_FEATURES really are KVM_CPUID_FEATURES")
Signed-off-by: Paul Durrant <pdurrant@amazon.com>
Message-Id: <20211115144131.5943-1-pdurrant@amazon.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 years agoata: libata-sata: Declare ata_ncq_sdev_attrs static
Damien Le Moal [Thu, 18 Nov 2021 05:31:41 +0000 (14:31 +0900)]
ata: libata-sata: Declare ata_ncq_sdev_attrs static

Since ata_ncq_sdev_attrs is a local struct, declare it static. This
avoids a sparse warning at compile time.

Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
2 years agoata: libahci: Adjust behavior when StorageD3Enable _DSD is set
Mario Limonciello [Fri, 12 Nov 2021 20:15:39 +0000 (14:15 -0600)]
ata: libahci: Adjust behavior when StorageD3Enable _DSD is set

The StorageD3Enable _DSD is used for the vendor to indicate that the disk
should be opted into or out of a different behavior based upon the platform
design.

For AMD's Renoir and Green Sardine platforms it's important that any
attached SATA storage has transitioned into DevSlp when s2idle is used.

If the disk is left in active/partial/slumber, then the system is not able
to resume properly.

When the StorageD3Enable _DSD is detected, check the system is using s2idle
and DevSlp is enabled and if so explicitly wait long enough for the disk to
enter DevSlp.

Cc: Nehal-bakulchandra Shah <Nehal-bakulchandra.Shah@amd.com>
BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=214091
Link: https://docs.microsoft.com/en-us/windows-hardware/design/component-guidelines/power-management-for-storage-hardware-devices-intro
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
2 years agoata: ahci: Add Green Sardine vendor ID as board_ahci_mobile
Mario Limonciello [Fri, 12 Nov 2021 20:15:38 +0000 (14:15 -0600)]
ata: ahci: Add Green Sardine vendor ID as board_ahci_mobile

AMD requires that the SATA controller be configured for devsleep in order
for S0i3 entry to work properly.

commit b1a9585cc396 ("ata: ahci: Enable DEVSLP by default on x86 with
SLP_S0") sets up a kernel policy to enable devsleep on Intel mobile
platforms that are using s0ix.  Add the PCI ID for the SATA controller in
Green Sardine platforms to extend this policy by default for AMD based
systems using s0i3 as well.

Cc: Nehal-bakulchandra Shah <Nehal-bakulchandra.Shah@amd.com>
BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=214091
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
2 years agoata: libata: add missing ata_identify_page_supported() calls
Damien Le Moal [Mon, 15 Nov 2021 03:47:26 +0000 (12:47 +0900)]
ata: libata: add missing ata_identify_page_supported() calls

ata_dev_config_ncq_prio() and ata_dev_config_devslp() both access pages
of the IDENTIFY DEVICE data log. Before calling ata_read_log_page(),
make sure to check for the existence of the IDENTIFY DEVICE data log and
of the log page accessed using ata_identify_page_supported(). This
avoids useless error messages from ata_read_log_page() and failures with
some LLDD scsi drivers using libsas.

Reported-by: Nikolay <knv418@gmail.com>
Cc: stable@kernel.org # 5.15
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Tested-by: Matthew Perkowski <mgperkow@gmail.com>
2 years agoocteontx2-af: debugfs: don't corrupt user memory
Dan Carpenter [Wed, 17 Nov 2021 07:34:54 +0000 (10:34 +0300)]
octeontx2-af: debugfs: don't corrupt user memory

The user supplies the "count" value to say how big its read buffer is.
The rvu_dbg_lmtst_map_table_display() function does not take the "count"
into account but instead just copies the whole table, potentially
corrupting the user's data.

Introduce the "ret" variable to store how many bytes we can copy.  Also
I changed the type of "off" to size_t to make using min() simpler.

Fixes: 0daa55d033b0 ("octeontx2-af: cn10k: debugfs for dumping LMTST map table")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20211117073454.GD5237@kili
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoNFC: add NCI_UNREG flag to eliminate the race
Lin Ma [Tue, 16 Nov 2021 15:27:32 +0000 (23:27 +0800)]
NFC: add NCI_UNREG flag to eliminate the race

There are two sites that calls queue_work() after the
destroy_workqueue() and lead to possible UAF.

The first site is nci_send_cmd(), which can happen after the
nci_close_device as below

nfcmrvl_nci_unregister_dev   |  nfc_genl_dev_up
  nci_close_device           |
    flush_workqueue          |
    del_timer_sync           |
  nci_unregister_device      |    nfc_get_device
    destroy_workqueue        |    nfc_dev_up
    nfc_unregister_device    |      nci_dev_up
      device_del             |        nci_open_device
                             |          __nci_request
                             |            nci_send_cmd
                             |              queue_work !!!

Another site is nci_cmd_timer, awaked by the nci_cmd_work from the
nci_send_cmd.

  ...                        |  ...
  nci_unregister_device      |  queue_work
    destroy_workqueue        |
    nfc_unregister_device    |  ...
      device_del             |  nci_cmd_work
                             |  mod_timer
                             |  ...
                             |  nci_cmd_timer
                             |    queue_work !!!

For the above two UAF, the root cause is that the nfc_dev_up can race
between the nci_unregister_device routine. Therefore, this patch
introduce NCI_UNREG flag to easily eliminate the possible race. In
addition, the mutex_lock in nci_close_device can act as a barrier.

Signed-off-by: Lin Ma <linma@zju.edu.cn>
Fixes: 6a2968aaf50c ("NFC: basic NCI protocol implementation")
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20211116152732.19238-1-linma@zju.edu.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoNFC: reorder the logic in nfc_{un,}register_device
Lin Ma [Tue, 16 Nov 2021 15:26:52 +0000 (23:26 +0800)]
NFC: reorder the logic in nfc_{un,}register_device

There is a potential UAF between the unregistration routine and the NFC
netlink operations.

The race that cause that UAF can be shown as below:

 (FREE)                      |  (USE)
nfcmrvl_nci_unregister_dev   |  nfc_genl_dev_up
  nci_close_device           |
  nci_unregister_device      |    nfc_get_device
    nfc_unregister_device    |    nfc_dev_up
      rfkill_destory         |
      device_del             |      rfkill_blocked
  ...                        |    ...

The root cause for this race is concluded below:
1. The rfkill_blocked (USE) in nfc_dev_up is supposed to be placed after
the device_is_registered check.
2. Since the netlink operations are possible just after the device_add
in nfc_register_device, the nfc_dev_up() can happen anywhere during the
rfkill creation process, which leads to data race.

This patch reorder these actions to permit
1. Once device_del is finished, the nfc_dev_up cannot dereference the
rfkill object.
2. The rfkill_register need to be placed after the device_add of nfc_dev
because the parent device need to be created first. So this patch keeps
the order but inject device_lock to prevent the data race.

Signed-off-by: Lin Ma <linma@zju.edu.cn>
Fixes: be055b2f89b5 ("NFC: RFKILL support")
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20211116152652.19217-1-linma@zju.edu.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoNFC: reorganize the functions in nci_request
Lin Ma [Mon, 15 Nov 2021 14:56:00 +0000 (22:56 +0800)]
NFC: reorganize the functions in nci_request

There is a possible data race as shown below:

thread-A in nci_request()       | thread-B in nci_close_device()
                                | mutex_lock(&ndev->req_lock);
test_bit(NCI_UP, &ndev->flags); |
...                             | test_and_clear_bit(NCI_UP, &ndev->flags)
mutex_lock(&ndev->req_lock);    |
                                |

This race will allow __nci_request() to be awaked while the device is
getting removed.

Similar to commit e2cb6b891ad2 ("bluetooth: eliminate the potential race
condition when removing the HCI controller"). this patch alters the
function sequence in nci_request() to prevent the data races between the
nci_close_device().

Signed-off-by: Lin Ma <linma@zju.edu.cn>
Fixes: 6a2968aaf50c ("NFC: basic NCI protocol implementation")
Link: https://lore.kernel.org/r/20211115145600.8320-1-linma@zju.edu.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agodrm/amd/amdgpu: fix potential memleak
Bernard Zhao [Mon, 15 Nov 2021 02:58:50 +0000 (18:58 -0800)]
drm/amd/amdgpu: fix potential memleak

In function amdgpu_get_xgmi_hive, when kobject_init_and_add failed
There is a potential memleak if not call kobject_put.

Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Bernard Zhao <bernard@vivo.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2 years agodrm/amd/amdkfd: Fix kernel panic when reset failed and been triggered again
shaoyunl [Sun, 14 Nov 2021 17:38:18 +0000 (12:38 -0500)]
drm/amd/amdkfd: Fix kernel panic when reset failed and been triggered again

In SRIOV configuration, the reset may failed to bring asic back to normal but stop cpsch
already been called, the start_cpsch will not be called since there is no resume in this
case.  When reset been triggered again, driver should avoid to do uninitialization again.

Signed-off-by: shaoyunl <shaoyun.liu@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2 years agotipc: check for null after calling kmemdup
Tadeusz Struk [Mon, 15 Nov 2021 16:01:43 +0000 (08:01 -0800)]
tipc: check for null after calling kmemdup

kmemdup can return a null pointer so need to check for it, otherwise
the null key will be dereferenced later in tipc_crypto_key_xmit as
can be seen in the trace [1].

Cc: tipc-discussion@lists.sourceforge.net
Cc: stable@vger.kernel.org # 5.15, 5.14, 5.10
[1] https://syzkaller.appspot.com/bug?id=bca180abb29567b189efdbdb34cbf7ba851c2a58

Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Tadeusz Struk <tadeusz.struk@linaro.org>
Acked-by: Ying Xue <ying.xue@windriver.com>
Acked-by: Jon Maloy <jmaloy@redhat.com>
Link: https://lore.kernel.org/r/20211115160143.5099-1-tadeusz.struk@linaro.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agodrm/amd/pm: add GFXCLK/SCLK clocks level print support for APUs
Perry Yuan [Thu, 28 Oct 2021 10:05:42 +0000 (06:05 -0400)]
drm/amd/pm: add GFXCLK/SCLK clocks level print support for APUs

add support that allow the userspace tool like RGP to get the GFX clock
value at runtime, the fix follow the old way to show the min/current/max
clocks level for compatible consideration.

=== Test ===
$ cat /sys/class/drm/card0/device/pp_dpm_sclk
0: 200Mhz *
1: 1100Mhz
2: 1600Mhz

then run stress test on one APU system.
$ cat /sys/class/drm/card0/device/pp_dpm_sclk
0: 200Mhz
1: 1040Mhz *
2: 1600Mhz

The current GFXCLK value is updated at runtime.

BugLink: https://gitlab.freedesktop.org/mesa/mesa/-/issues/5260
Reviewed-by: Huang Ray <Ray.Huang@amd.com>
Signed-off-by: Perry Yuan <Perry.Yuan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
2 years agodrm/amdgpu: fix set scaling mode Full/Full aspect/Center not works on vga and dvi...
hongao [Thu, 11 Nov 2021 03:32:07 +0000 (11:32 +0800)]
drm/amdgpu: fix set scaling mode Full/Full aspect/Center not works on vga and dvi connectors

amdgpu_connector_vga_get_modes missed function amdgpu_get_native_mode
which assign amdgpu_encoder->native_mode with *preferred_mode result in
amdgpu_encoder->native_mode.clock always be 0. That will cause
amdgpu_connector_set_property returned early on:
if ((rmx_type != DRM_MODE_SCALE_NONE) &&
(amdgpu_encoder->native_mode.clock == 0))
when we try to set scaling mode Full/Full aspect/Center.
Add the missing function to amdgpu_connector_vga_get_mode can fix this.
It also works on dvi connectors because
amdgpu_connector_dvi_helper_funcs.get_mode use the same method.

Signed-off-by: hongao <hongao@uniontech.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
2 years agodrm/amd/display: Fix OLED brightness control on eDP
Roman Li [Wed, 17 Nov 2021 15:05:36 +0000 (10:05 -0500)]
drm/amd/display: Fix OLED brightness control on eDP

[Why]
After commit ("drm/amdgpu/display: add support for multiple backlights")
number of eDPs is defined while registering backlight device.
However the panel's extended caps get updated once before register call.
That leads to regression with extended caps like oled brightness control.

[How]
Update connector ext caps after register_backlight_device

Fixes: 7fd13baeb7a3a4 ("drm/amdgpu/display: add support for multiple backlights")
Link: https://www.reddit.com/r/AMDLaptops/comments/qst0fm/after_updating_to_linux_515_my_brightness/
Signed-off-by: Roman Li <Roman.Li@amd.com>
Tested-by: Samuel Čavoj <samuel@cavoj.net>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Jasdeep Dhillon <Jasdeep.Dhillon@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
2 years agoi40e: Fix display error code in dmesg
Grzegorz Szczurek [Fri, 29 Oct 2021 09:26:01 +0000 (11:26 +0200)]
i40e: Fix display error code in dmesg

Fix misleading display error in dmesg if tc filter return fail.
Only i40e status error code should be converted to string, not linux
error code. Otherwise, we return false information about the error.

Fixes: 2f4b411a3d67 ("i40e: Enable cloud filters via tc-flower")
Signed-off-by: Grzegorz Szczurek <grzegorzx.szczurek@intel.com>
Signed-off-by: Mateusz Palczewski <mateusz.palczewski@intel.com>
Tested-by: Dave Switzer <david.switzer@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
2 years agoi40e: Fix creation of first queue by omitting it if is not power of two
Jedrzej Jagielski [Mon, 21 Jun 2021 08:37:31 +0000 (08:37 +0000)]
i40e: Fix creation of first queue by omitting it if is not power of two

Reject TCs creation with proper message if the first queue
assignment is not equal to the power of two.
The first queue number was checked too late in the second queue
iteration, if second queue was configured at all. Now if first queue value
is not a power of two, then trying to create qdisc will be rejected.

Fixes: 8f88b3034db3 ("i40e: Add infrastructure for queue channel support")
Signed-off-by: Grzegorz Szczurek <grzegorzx.szczurek@intel.com>
Signed-off-by: Jedrzej Jagielski <jedrzej.jagielski@intel.com>
Tested-by: Tony Brelinski <tony.brelinski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
2 years agoi40e: Fix warning message and call stack during rmmod i40e driver
Karen Sornek [Wed, 28 Apr 2021 08:19:41 +0000 (10:19 +0200)]
i40e: Fix warning message and call stack during rmmod i40e driver

Restore part of reset functionality used when reset is called
from the VF to reset itself. Without this fix warning message
is displayed when VF is being removed via sysfs.

Fix the crash of the VF during reset by ensuring
that the PF receives the reset message successfully.
Refactor code to use one function instead of two.

Fixes: 5c3c48ac6bf5 ("i40e: implement virtual device interface")
Signed-off-by: Grzegorz Szczurek <grzegorzx.szczurek@intel.com>
Signed-off-by: Karen Sornek <karen.sornek@intel.com>
Tested-by: Tony Brelinski <tony.brelinski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
2 years agoMerge tag 'gfs2-v5.16-rc2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Wed, 17 Nov 2021 23:55:07 +0000 (15:55 -0800)]
Merge tag 'gfs2-v5.16-rc2-fixes' of git://git./linux/kernel/git/gfs2/linux-gfs2

Pull gfs2 fixes from Andreas Gruenbacher:

 - The current iomap_file_buffered_write behavior of failing the entire
   write when part of the user buffer cannot be faulted in leads to an
   endless loop in gfs2. Work around that in gfs2 for now.

 - Various other bugs all over the place.

* tag 'gfs2-v5.16-rc2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2:
  gfs2: Prevent endless loops in gfs2_file_buffered_write
  gfs2: Fix "Introduce flag for glock holder auto-demotion"
  gfs2: Fix length of holes reported at end-of-file
  gfs2: release iopen glock early in evict
  gfs2: Fix atomic bug in gfs2_instantiate
  gfs2: Only dereference i->iov when iter_is_iovec(i)