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Author SHA1 Message Date
Jakub Kicinski
5e5d8b94a4 netfilter pull request 23-10-25
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Merge tag 'nf-23-10-25' of git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf

Pablo Neira Ayuso says:

====================
Netfilter fixes for net

This patch contains two late Netfilter's flowtable fixes for net:

1) Flowtable GC pushes back packets to classic path in every GC run,
   ie. every second. This is because NF_FLOW_HW_ESTABLISHED is only
   used by sched/act_ct (never set) and IPS_SEEN_REPLY might be unset
   by the time the flow is offloaded (this status bit is only reliable
   in the sched/act_ct datapath).

2) sched/act_ct logic to push back packets to classic path to reevaluate
   if UDP flow is unidirectional only applies if IPS_HW_OFFLOAD_BIT is
   set on and no hardware offload request is pending to be handled.
   From Vlad Buslov.

These two patches fixes two problems that were introduced in the
previous 6.5 development cycle.

* tag 'nf-23-10-25' of git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf:
  net/sched: act_ct: additional checks for outdated flows
  netfilter: flowtable: GC pushes back packets to classic path
====================

Link: https://lore.kernel.org/r/20231025100819.2664-1-pablo@netfilter.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2023-10-25 16:02:06 -07:00
Alexandru Matei
53b08c4985 vsock/virtio: initialize the_virtio_vsock before using VQs
Once VQs are filled with empty buffers and we kick the host, it can send
connection requests. If the_virtio_vsock is not initialized before,
replies are silently dropped and do not reach the host.

virtio_transport_send_pkt() can queue packets once the_virtio_vsock is
set, but they won't be processed until vsock->tx_run is set to true. We
queue vsock->send_pkt_work when initialization finishes to send those
packets queued earlier.

Fixes: 0deab087b1 ("vsock/virtio: use RCU to avoid use-after-free on the_virtio_vsock")
Signed-off-by: Alexandru Matei <alexandru.matei@uipath.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Link: https://lore.kernel.org/r/20231024191742.14259-1-alexandru.matei@uipath.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2023-10-25 15:49:47 -07:00
Kai-Heng Feng
13cf36c648 PCI/AER: Factor out interrupt toggling into helpers
There are many places that enable and disable AER interrupt, so move
them into helpers.

Link: https://lore.kernel.org/r/20230512000014.118942-1-kai.heng.feng@canonical.com
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2023-10-25 17:25:23 -05:00
Ian Rogers
3779416eed perf vendor events intel: Fix broadwellde tma_info_system_dram_bw_use metric
Broadwell-de has a consumer core and server uncore. The uncore_arb PMU
isn't present and the broadwellx style cbox PMU should be used
instead. Fix the tma_info_system_dram_bw_use metric to use the server
metric rather than client.

The associated converter script fix is in:
https://github.com/intel/perfmon/pull/111

Fixes: 7d124303d6 ("perf vendor events intel: Update broadwell variant events/metrics")
Signed-off-by: Ian Rogers <irogers@google.com>
Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Cc: Caleb Biggers <caleb.biggers@intel.com>
Cc: Perry Taylor <perry.taylor@intel.com>
Link: https://lore.kernel.org/r/20230926031034.1201145-1-irogers@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2023-10-25 15:19:28 -07:00
Dominique Martinet
9b5c628183 9p: v9fs_listxattr: fix %s null argument warning
W=1 warns about null argument to kprintf:
In file included from fs/9p/xattr.c:12:
In function ‘v9fs_xattr_get’,
    inlined from ‘v9fs_listxattr’ at fs/9p/xattr.c:142:9:
include/net/9p/9p.h:55:2: error: ‘%s’ directive argument is null
[-Werror=format-overflow=]
   55 |  _p9_debug(level, __func__, fmt, ##__VA_ARGS__)
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Use an empty string instead of :
 - this is ok 9p-wise because p9pdu_vwritef serializes a null string
and an empty string the same way (one '0' word for length)
 - since this degrades the print statements, add new single quotes for
xattr's name delimter (Old: "file = (null)", new: "file = ''")

Link: https://lore.kernel.org/r/20231008060138.517057-1-suhui@nfschina.com
Suggested-by: Su Hui <suhui@nfschina.com>
Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>
Acked-by: Christian Schoenebeck <linux_oss@crudebyte.com>
Message-ID: <20231025103445.1248103-2-asmadeus@codewreck.org>
2023-10-26 07:05:52 +09:00
Marco Elver
355f074609 9p/trans_fd: Annotate data-racy writes to file::f_flags
syzbot reported:

 | BUG: KCSAN: data-race in p9_fd_create / p9_fd_create
 |
 | read-write to 0xffff888130fb3d48 of 4 bytes by task 15599 on cpu 0:
 |  p9_fd_open net/9p/trans_fd.c:842 [inline]
 |  p9_fd_create+0x210/0x250 net/9p/trans_fd.c:1092
 |  p9_client_create+0x595/0xa70 net/9p/client.c:1010
 |  v9fs_session_init+0xf9/0xd90 fs/9p/v9fs.c:410
 |  v9fs_mount+0x69/0x630 fs/9p/vfs_super.c:123
 |  legacy_get_tree+0x74/0xd0 fs/fs_context.c:611
 |  vfs_get_tree+0x51/0x190 fs/super.c:1519
 |  do_new_mount+0x203/0x660 fs/namespace.c:3335
 |  path_mount+0x496/0xb30 fs/namespace.c:3662
 |  do_mount fs/namespace.c:3675 [inline]
 |  __do_sys_mount fs/namespace.c:3884 [inline]
 |  [...]
 |
 | read-write to 0xffff888130fb3d48 of 4 bytes by task 15563 on cpu 1:
 |  p9_fd_open net/9p/trans_fd.c:842 [inline]
 |  p9_fd_create+0x210/0x250 net/9p/trans_fd.c:1092
 |  p9_client_create+0x595/0xa70 net/9p/client.c:1010
 |  v9fs_session_init+0xf9/0xd90 fs/9p/v9fs.c:410
 |  v9fs_mount+0x69/0x630 fs/9p/vfs_super.c:123
 |  legacy_get_tree+0x74/0xd0 fs/fs_context.c:611
 |  vfs_get_tree+0x51/0x190 fs/super.c:1519
 |  do_new_mount+0x203/0x660 fs/namespace.c:3335
 |  path_mount+0x496/0xb30 fs/namespace.c:3662
 |  do_mount fs/namespace.c:3675 [inline]
 |  __do_sys_mount fs/namespace.c:3884 [inline]
 |  [...]
 |
 | value changed: 0x00008002 -> 0x00008802

Within p9_fd_open(), O_NONBLOCK is added to f_flags of the read and
write files. This may happen concurrently if e.g. mounting process
modifies the fd in another thread.

Mark the plain read-modify-writes as intentional data-races, with the
assumption that the result of executing the accesses concurrently will
always result in the same result despite the accesses themselves not
being atomic.

Reported-by: syzbot+e441aeeb422763cc5511@syzkaller.appspotmail.com
Signed-off-by: Marco Elver <elver@google.com>
Link: https://lore.kernel.org/r/ZO38mqkS0TYUlpFp@elver.google.com
Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>
Message-ID: <20231025103445.1248103-1-asmadeus@codewreck.org>
2023-10-26 07:05:42 +09:00
Guenter Roeck
d621a46d05 Revert "hwmon: (sch56xx-common) Add automatic module loading on supported devices"
This reverts commit 393935baa4.

As reported by Ian Nartowicz, this and the next patch
result in a failure to load the driver on Celsius W280.
While the alternative would be to add the board to the DMI
override table, it is quite likely that other systems are
also affected. Revert the offending patches to avoid future
problems.

Fixes: 393935baa4 ("hwmon: (sch56xx-common) Add automatic module loading on supported devices")
Reported-by: Ian Nartowicz <deadbeef@nartowicz.co.uk>
Closes: https://lore.kernel.org/linux-hwmon/20231025192239.3c5389ae@debian.org/T/#t
Cc: Armin Wolf <W_Armin@gmx.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2023-10-25 14:36:05 -07:00
Guenter Roeck
28da9dee35 Revert "hwmon: (sch56xx-common) Add DMI override table"
This reverts commit fd2d53c367.

As reported by Ian Nartowicz, this and the preceding patch
result in a failure to load the driver on Celsius W280.
While the alternative would be to add the board to the DMI
override table, it is quite likely that other systems are
also affected. Revert the offending patches to avoid future
problems.

Fixes: fd2d53c367 ("hwmon: (sch56xx-common) Add DMI override table")
Reported-by: Ian Nartowicz <deadbeef@nartowicz.co.uk>
Closes: https://lore.kernel.org/linux-hwmon/20231025192239.3c5389ae@debian.org/T/#t
Cc: Armin Wolf <W_Armin@gmx.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2023-10-25 14:35:57 -07:00
Arnd Bergmann
c505e1e4b1 One new board the Turing RK1 system on module.
Support for DFI (DDR performance monitoring) for rk3588, rk3568 and an
 enable-fix for rk3399 as well as some small fixups for the RGB30 handheld
 (non-existent uart and better vpll frequency).
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Merge tag 'v6.7-rockchip-dts64-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip into soc/dt

One new board the Turing RK1 system on module.
Support for DFI (DDR performance monitoring) for rk3588, rk3568 and an
enable-fix for rk3399 as well as some small fixups for the RGB30 handheld
(non-existent uart and better vpll frequency).

* tag 'v6.7-rockchip-dts64-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip:
  arm64: dts: rockchip: Add Turing RK1 SoM support
  dt-bindings: arm: rockchip: Add Turing RK1
  dt-bindings: vendor-prefixes: add turing
  arm64: dts: rockchip: Add DFI to rk3588s
  arm64: dts: rockchip: Add DFI to rk356x
  arm64: dts: rockchip: Always enable DFI on rk3399
  arm64: dts: rockchip: Remove UART2 from RGB30
  arm64: dts: rockchip: Update VPLL Frequency for RGB30

Link: https://lore.kernel.org/r/2777623.BEx9A2HvPv@phil
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2023-10-25 23:11:54 +02:00
Arnd Bergmann
f652f84a9f TI K3 device-tree updates for v6.7 - part 2
Second round of few DT updates for K3 platforms. These have been in
 linux-next for a few days without issues. Most of the additions is for
 newer AM62P SoC dtsi bringing support on par with rest of AM62x family.
 
 New features:
 AM62P SoCs:
 Support for wide range of peripherals such as eMMC/SD,
 CPSW Ethernet, OSPI, etc similar to AM62
 
 J721s2/J784s4/AM69 SoCs:
 Display support via DP and HDMI interfaces and associated SerDes support
 
 AM654 EVM/IDK:
 ICSSG/PRU based industrial Ethernet support
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Merge tag 'ti-k3-dt-for-v6.7-part2' of https://git.kernel.org/pub/scm/linux/kernel/git/ti/linux into soc/dt

TI K3 device-tree updates for v6.7 - part 2

Second round of few DT updates for K3 platforms. These have been in
linux-next for a few days without issues. Most of the additions is for
newer AM62P SoC dtsi bringing support on par with rest of AM62x family.

New features:
AM62P SoCs:
Support for wide range of peripherals such as eMMC/SD,
CPSW Ethernet, OSPI, etc similar to AM62

J721s2/J784s4/AM69 SoCs:
Display support via DP and HDMI interfaces and associated SerDes support

AM654 EVM/IDK:
ICSSG/PRU based industrial Ethernet support

* tag 'ti-k3-dt-for-v6.7-part2' of https://git.kernel.org/pub/scm/linux/kernel/git/ti/linux:
  arm64: dts: ti: k3-am654-idk: Add ICSSG Ethernet ports
  arm64: dts: ti: k3-am654-icssg2: add ICSSG2 Ethernet support
  arm64: dts: ti: k3-am65-main: Add ICSSG IEP nodes
  arm64: dts: ti: k3-am62p5-sk: Updates for SK EVM
  arm64: dts: ti: k3-am62p: Add nodes for more IPs
  arm64: dts: ti: k3-am69-sk: Add DP and HDMI support
  arm64: dts: ti: k3-j784s4-evm: Enable DisplayPort-0
  arm64: dts: ti: k3-j784s4-main: Add DSS and DP-bridge node
  arm64: dts: ti: k3-j784s4-main: Add WIZ and SERDES PHY nodes
  arm64: dts: ti: k3-j784s4-main: Add system controller and SERDES lane mux

Link: https://lore.kernel.org/r/35a3c4c9-5c1b-4891-9ea2-e3f648a9afe0@ti.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2023-10-25 23:10:29 +02:00
Arnd Bergmann
a26dffc163 This pull request contains Broadcom ARM-based SoCs changes for 6.7,
please pull the following:
 
 - Rafal makes a number of updates to the BCM5301X (Northstar) SoCs DTS
   to set MAC addresses for D-LInk DIR-885L, Asus, RT-AC87U, he
   relicenses parts of the DTSI to GPL 2.0+ / MIT, and finally fixes a
   number of Ethernet switch ports properties to enable/disable ports
   adequately.
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Merge tag 'arm-soc/for-6.7/devicetree' of https://github.com/Broadcom/stblinux into soc/dt

This pull request contains Broadcom ARM-based SoCs changes for 6.7,
please pull the following:

- Rafal makes a number of updates to the BCM5301X (Northstar) SoCs DTS
  to set MAC addresses for D-LInk DIR-885L, Asus, RT-AC87U, he
  relicenses parts of the DTSI to GPL 2.0+ / MIT, and finally fixes a
  number of Ethernet switch ports properties to enable/disable ports
  adequately.

* tag 'arm-soc/for-6.7/devicetree' of https://github.com/Broadcom/stblinux:
  ARM: dts: BCM5301X: Set switch ports for Linksys EA9200
  ARM: dts: BCM5301X: Set fixed-link for extra Netgear R8000 CPU ports
  ARM: dts: BCM5301X: Explicitly disable unused switch CPU ports
  ARM: dts: BCM5301X: Relicense Vivek's code to the GPL 2.0+ / MIT
  ARM: dts: BCM5301X: Relicense Felix's code to the GPL 2.0+ / MIT
  ARM: dts: BCM5301X: Set MAC address for Asus RT-AC87U
  ARM: dts: BCM5301X: Set MACs for D-Link DIR-885L

Link: https://lore.kernel.org/r/20231024155927.977263-1-florian.fainelli@broadcom.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2023-10-25 23:09:26 +02:00
Arnd Bergmann
e209b029c7 Samsung DTS ARM changes for v6.7, part two
Two minor improvements for Midas boards (Exynos4412, e.g. Samsung Galaxy S3):
 1. Correct the middle hardware key to emit KEY_OK instead of KEY_MENU,
    because there is already separate touchkey providing KEY_MENU and
    both label and node name suggests this should be KEY_OK.
 2. Use defines for other key input constants.
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Merge tag 'samsung-dt-6.7-2' of https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux into soc/dt

Samsung DTS ARM changes for v6.7, part two

Two minor improvements for Midas boards (Exynos4412, e.g. Samsung Galaxy S3):
1. Correct the middle hardware key to emit KEY_OK instead of KEY_MENU,
   because there is already separate touchkey providing KEY_MENU and
   both label and node name suggests this should be KEY_OK.
2. Use defines for other key input constants.

* tag 'samsung-dt-6.7-2' of https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux:
  ARM: dts: samsung: exynos4412-midas: use Linux event codes for input keys
  ARM: dts: samsung: exynos4412-midas: fix key-ok event code

Link: https://lore.kernel.org/r/20231024132615.65609-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2023-10-25 23:08:41 +02:00
Arnd Bergmann
dfae947836 More Qualcomm driver updates for v6.7
The Qualcomm SMC an QSEECOM drivers are moved into a "qcom"
 subdirectory, to declutter the base directory. Missing include guards
 are added to the qseecom header file. Unneded extern specifiers are
 removed from the scm call wrappers.
 
 __counted_by is added to the apr_rx_buf structure, in the APR driver.
 
 Lastly in the pmic_glink driver the pmic_glink drm_bridge type is
 corrected to DisplayPort, over the incorrect "USB" value. The return
 values are added to error prints for the various typec set() calls.
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Merge tag 'qcom-drivers-for-6.7-2' of https://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux into soc/drivers

More Qualcomm driver updates for v6.7

The Qualcomm SMC an QSEECOM drivers are moved into a "qcom"
subdirectory, to declutter the base directory. Missing include guards
are added to the qseecom header file. Unneded extern specifiers are
removed from the scm call wrappers.

__counted_by is added to the apr_rx_buf structure, in the APR driver.

Lastly in the pmic_glink driver the pmic_glink drm_bridge type is
corrected to DisplayPort, over the incorrect "USB" value. The return
values are added to error prints for the various typec set() calls.

* tag 'qcom-drivers-for-6.7-2' of https://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux:
  soc: qcom: pmic_glink_altmode: Print return value on error
  firmware: qcom: scm: remove unneeded 'extern' specifiers
  firmware: qcom: scm: add a missing forward declaration for struct device
  firmware: qcom: move Qualcomm code into its own directory
  soc: qcom: apr: Add __counted_by for struct apr_rx_buf and use struct_size()
  soc: qcom: pmic_glink: fix connector type to be DisplayPort
  firmware: qcom: qseecom: add missing include guards

Link: https://lore.kernel.org/r/20231025201109.1016121-1-andersson@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2023-10-25 22:58:30 +02:00
Arnd Bergmann
759c2e043a This pull request contains Broadcom ARM/ARM64/MIPS SoCs drivers changes
for 6.7, please pull the following:
 
 - Kieran fixes the kdoc for devm_rpi_firmware_get
 - Peter updates the dependices of the brcmstb SoC driver and
   brcmstb_gisb drivers which are ARCH_BRCMSTB specific
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Merge tag 'arm-soc/for-6.7/drivers' of https://github.com/Broadcom/stblinux into soc/drivers

This pull request contains Broadcom ARM/ARM64/MIPS SoCs drivers changes
for 6.7, please pull the following:

- Kieran fixes the kdoc for devm_rpi_firmware_get
- Peter updates the dependices of the brcmstb SoC driver and
  brcmstb_gisb drivers which are ARCH_BRCMSTB specific

* tag 'arm-soc/for-6.7/drivers' of https://github.com/Broadcom/stblinux:
  bus: brcmstb_gisb: Depend on SoC specifics over generic arm
  soc: bcm: brcmstb: depend on ARCH_BRCMSTB over arm arches
  firmware: raspberrypi: Fix devm_rpi_firmware_get documentation

Link: https://lore.kernel.org/r/20231024155927.977263-2-florian.fainelli@broadcom.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2023-10-25 22:57:04 +02:00
Ian Rogers
56e144fe98 perf mem_info: Add and use map_symbol__exit and addr_map_symbol__exit
Fix leak where mem_info__put wouldn't release the maps/map as used by
perf mem. Add exit functions and use elsewhere that the maps and map
are released.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: K Prateek Nayak <kprateek.nayak@amd.com>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sandipan Das <sandipan.das@amd.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: German Gomez <german.gomez@arm.com>
Cc: James Clark <james.clark@arm.com>
Cc: Nick Terrell <terrelln@fb.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Changbin Du <changbin.du@huawei.com>
Cc: liuwenyu <liuwenyu7@huawei.com>
Cc: Yang Jihong <yangjihong1@huawei.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Miguel Ojeda <ojeda@kernel.org>
Cc: Song Liu <song@kernel.org>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Yanteng Si <siyanteng@loongson.cn>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Link: https://lore.kernel.org/r/20231024222353.3024098-12-irogers@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2023-10-25 13:39:58 -07:00
Ian Rogers
dec07fe5d4 perf callchain: Minor layout changes to callchain_list
Avoid 6 byte hole for padding. Place more frequently used fields
first in an attempt to use just 1 cacheline in the common case.

Before:
```
struct callchain_list {
        u64                        ip;                   /*     0     8 */
        struct map_symbol          ms;                   /*     8    24 */
        struct {
                _Bool              unfolded;             /*    32     1 */
                _Bool              has_children;         /*    33     1 */
        };                                               /*    32     2 */

        /* XXX 6 bytes hole, try to pack */

        u64                        branch_count;         /*    40     8 */
        u64                        from_count;           /*    48     8 */
        u64                        predicted_count;      /*    56     8 */
        /* --- cacheline 1 boundary (64 bytes) --- */
        u64                        abort_count;          /*    64     8 */
        u64                        cycles_count;         /*    72     8 */
        u64                        iter_count;           /*    80     8 */
        u64                        iter_cycles;          /*    88     8 */
        struct branch_type_stat *  brtype_stat;          /*    96     8 */
        const char  *              srcline;              /*   104     8 */
        struct list_head           list;                 /*   112    16 */

        /* size: 128, cachelines: 2, members: 13 */
        /* sum members: 122, holes: 1, sum holes: 6 */
};
```

After:
```
struct callchain_list {
        struct list_head           list;                 /*     0    16 */
        u64                        ip;                   /*    16     8 */
        struct map_symbol          ms;                   /*    24    24 */
        const char  *              srcline;              /*    48     8 */
        u64                        branch_count;         /*    56     8 */
        /* --- cacheline 1 boundary (64 bytes) --- */
        u64                        from_count;           /*    64     8 */
        u64                        cycles_count;         /*    72     8 */
        u64                        iter_count;           /*    80     8 */
        u64                        iter_cycles;          /*    88     8 */
        struct branch_type_stat *  brtype_stat;          /*    96     8 */
        u64                        predicted_count;      /*   104     8 */
        u64                        abort_count;          /*   112     8 */
        struct {
                _Bool              unfolded;             /*   120     1 */
                _Bool              has_children;         /*   121     1 */
        };                                               /*   120     2 */

        /* size: 128, cachelines: 2, members: 13 */
        /* padding: 6 */
};
```

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: K Prateek Nayak <kprateek.nayak@amd.com>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sandipan Das <sandipan.das@amd.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: German Gomez <german.gomez@arm.com>
Cc: James Clark <james.clark@arm.com>
Cc: Nick Terrell <terrelln@fb.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Changbin Du <changbin.du@huawei.com>
Cc: liuwenyu <liuwenyu7@huawei.com>
Cc: Yang Jihong <yangjihong1@huawei.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Miguel Ojeda <ojeda@kernel.org>
Cc: Song Liu <song@kernel.org>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Yanteng Si <siyanteng@loongson.cn>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Link: https://lore.kernel.org/r/20231024222353.3024098-11-irogers@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2023-10-25 13:39:32 -07:00
Ian Rogers
6ba29fbb0b perf callchain: Make brtype_stat in callchain_list optional
struct callchain_list is 352bytes in size, 232 of which are
brtype_stat. brtype_stat is only used for certain callchain_list
items so make it optional, allocating when necessary. So that
printing doesn't need to deal with an optional brtype_stat, pass
an empty/zero version.

Before:
```
struct callchain_list {
        u64                        ip;                   /*     0     8 */
        struct map_symbol          ms;                   /*     8    24 */
        struct {
                _Bool              unfolded;             /*    32     1 */
                _Bool              has_children;         /*    33     1 */
        };                                               /*    32     2 */

        /* XXX 6 bytes hole, try to pack */

        u64                        branch_count;         /*    40     8 */
        u64                        from_count;           /*    48     8 */
        u64                        predicted_count;      /*    56     8 */
        /* --- cacheline 1 boundary (64 bytes) --- */
        u64                        abort_count;          /*    64     8 */
        u64                        cycles_count;         /*    72     8 */
        u64                        iter_count;           /*    80     8 */
        u64                        iter_cycles;          /*    88     8 */
        struct branch_type_stat    brtype_stat;          /*    96   232 */
        /* --- cacheline 5 boundary (320 bytes) was 8 bytes ago --- */
        const char  *              srcline;              /*   328     8 */
        struct list_head           list;                 /*   336    16 */

        /* size: 352, cachelines: 6, members: 13 */
        /* sum members: 346, holes: 1, sum holes: 6 */
        /* last cacheline: 32 bytes */
};
```

After:
```
struct callchain_list {
        u64                        ip;                   /*     0     8 */
        struct map_symbol          ms;                   /*     8    24 */
        struct {
                _Bool              unfolded;             /*    32     1 */
                _Bool              has_children;         /*    33     1 */
        };                                               /*    32     2 */

        /* XXX 6 bytes hole, try to pack */

        u64                        branch_count;         /*    40     8 */
        u64                        from_count;           /*    48     8 */
        u64                        predicted_count;      /*    56     8 */
        /* --- cacheline 1 boundary (64 bytes) --- */
        u64                        abort_count;          /*    64     8 */
        u64                        cycles_count;         /*    72     8 */
        u64                        iter_count;           /*    80     8 */
        u64                        iter_cycles;          /*    88     8 */
        struct branch_type_stat *  brtype_stat;          /*    96     8 */
        const char  *              srcline;              /*   104     8 */
        struct list_head           list;                 /*   112    16 */

        /* size: 128, cachelines: 2, members: 13 */
        /* sum members: 122, holes: 1, sum holes: 6 */
};
```

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: K Prateek Nayak <kprateek.nayak@amd.com>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sandipan Das <sandipan.das@amd.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: German Gomez <german.gomez@arm.com>
Cc: James Clark <james.clark@arm.com>
Cc: Nick Terrell <terrelln@fb.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Changbin Du <changbin.du@huawei.com>
Cc: liuwenyu <liuwenyu7@huawei.com>
Cc: Yang Jihong <yangjihong1@huawei.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Miguel Ojeda <ojeda@kernel.org>
Cc: Song Liu <song@kernel.org>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Yanteng Si <siyanteng@loongson.cn>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Link: https://lore.kernel.org/r/20231024222353.3024098-10-irogers@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2023-10-25 13:39:08 -07:00
Ian Rogers
d47d876d72 perf callchain: Make display use of branch_type_stat const
Display code doesn't modify the branch_type_stat so switch uses to
const. This is done to aid refactoring struct callchain_list where
current the branch_type_stat is embedded even if not used.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: K Prateek Nayak <kprateek.nayak@amd.com>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sandipan Das <sandipan.das@amd.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: German Gomez <german.gomez@arm.com>
Cc: James Clark <james.clark@arm.com>
Cc: Nick Terrell <terrelln@fb.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Changbin Du <changbin.du@huawei.com>
Cc: liuwenyu <liuwenyu7@huawei.com>
Cc: Yang Jihong <yangjihong1@huawei.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Miguel Ojeda <ojeda@kernel.org>
Cc: Song Liu <song@kernel.org>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Yanteng Si <siyanteng@loongson.cn>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Link: https://lore.kernel.org/r/20231024222353.3024098-9-irogers@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2023-10-25 13:38:50 -07:00
Ian Rogers
67a3ebf1c3 perf offcpu: Add missed btf_free
Caught by address/leak sanitizer.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: K Prateek Nayak <kprateek.nayak@amd.com>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sandipan Das <sandipan.das@amd.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: German Gomez <german.gomez@arm.com>
Cc: James Clark <james.clark@arm.com>
Cc: Nick Terrell <terrelln@fb.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Changbin Du <changbin.du@huawei.com>
Cc: liuwenyu <liuwenyu7@huawei.com>
Cc: Yang Jihong <yangjihong1@huawei.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Miguel Ojeda <ojeda@kernel.org>
Cc: Song Liu <song@kernel.org>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Yanteng Si <siyanteng@loongson.cn>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Link: https://lore.kernel.org/r/20231024222353.3024098-8-irogers@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2023-10-25 13:38:33 -07:00
Ian Rogers
7b2e444b76 perf threads: Remove unused dead thread list
Commit 40826c45eb ("perf thread: Remove notion of dead threads")
removed dead threads but the list head wasn't removed. Remove it here.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: K Prateek Nayak <kprateek.nayak@amd.com>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sandipan Das <sandipan.das@amd.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: German Gomez <german.gomez@arm.com>
Cc: James Clark <james.clark@arm.com>
Cc: Nick Terrell <terrelln@fb.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Changbin Du <changbin.du@huawei.com>
Cc: liuwenyu <liuwenyu7@huawei.com>
Cc: Yang Jihong <yangjihong1@huawei.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Miguel Ojeda <ojeda@kernel.org>
Cc: Song Liu <song@kernel.org>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Yanteng Si <siyanteng@loongson.cn>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Link: https://lore.kernel.org/r/20231024222353.3024098-7-irogers@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2023-10-25 13:38:09 -07:00
Ian Rogers
c1149037f6 perf hist: Add missing puts to hist__account_cycles
Caught using reference count checking on perf top with
"--call-graph=lbr". After this no memory leaks were detected.

Fixes: 57849998e2 ("perf report: Add processing for cycle histograms")
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: K Prateek Nayak <kprateek.nayak@amd.com>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sandipan Das <sandipan.das@amd.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: German Gomez <german.gomez@arm.com>
Cc: James Clark <james.clark@arm.com>
Cc: Nick Terrell <terrelln@fb.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Changbin Du <changbin.du@huawei.com>
Cc: liuwenyu <liuwenyu7@huawei.com>
Cc: Yang Jihong <yangjihong1@huawei.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Miguel Ojeda <ojeda@kernel.org>
Cc: Song Liu <song@kernel.org>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Yanteng Si <siyanteng@loongson.cn>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Link: https://lore.kernel.org/r/20231024222353.3024098-6-irogers@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2023-10-25 13:37:48 -07:00
Ian Rogers
78c32f4cb1 libperf rc_check: Add RC_CHK_EQUAL
Comparing pointers with reference count checking is tricky to avoid a
SEGV. Add a convenience macro to simplify and use.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: K Prateek Nayak <kprateek.nayak@amd.com>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sandipan Das <sandipan.das@amd.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: German Gomez <german.gomez@arm.com>
Cc: James Clark <james.clark@arm.com>
Cc: Nick Terrell <terrelln@fb.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Changbin Du <changbin.du@huawei.com>
Cc: liuwenyu <liuwenyu7@huawei.com>
Cc: Yang Jihong <yangjihong1@huawei.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Miguel Ojeda <ojeda@kernel.org>
Cc: Song Liu <song@kernel.org>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Yanteng Si <siyanteng@loongson.cn>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Link: https://lore.kernel.org/r/20231024222353.3024098-5-irogers@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2023-10-25 13:37:22 -07:00
Ian Rogers
75265320d2 libperf rc_check: Make implicit enabling work for GCC
Make the implicit REFCOUNT_CHECKING robust to when building with GCC.

Fixes: 9be6ab181b ("libperf rc_check: Enable implicitly with sanitizers")
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: K Prateek Nayak <kprateek.nayak@amd.com>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sandipan Das <sandipan.das@amd.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: German Gomez <german.gomez@arm.com>
Cc: James Clark <james.clark@arm.com>
Cc: Nick Terrell <terrelln@fb.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Changbin Du <changbin.du@huawei.com>
Cc: liuwenyu <liuwenyu7@huawei.com>
Cc: Yang Jihong <yangjihong1@huawei.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Miguel Ojeda <ojeda@kernel.org>
Cc: Song Liu <song@kernel.org>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Yanteng Si <siyanteng@loongson.cn>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Link: https://lore.kernel.org/r/20231024222353.3024098-4-irogers@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2023-10-25 13:36:50 -07:00
Ian Rogers
ab8ce15078 perf machine: Avoid out of bounds LBR memory read
Running perf top with address sanitizer and "--call-graph=lbr" fails
due to reading sample 0 when no samples exist. Add a guard to prevent
this.

Fixes: e2b23483eb ("perf machine: Factor out lbr_callchain_add_lbr_ip()")
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: K Prateek Nayak <kprateek.nayak@amd.com>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sandipan Das <sandipan.das@amd.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: German Gomez <german.gomez@arm.com>
Cc: James Clark <james.clark@arm.com>
Cc: Nick Terrell <terrelln@fb.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Changbin Du <changbin.du@huawei.com>
Cc: liuwenyu <liuwenyu7@huawei.com>
Cc: Yang Jihong <yangjihong1@huawei.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Miguel Ojeda <ojeda@kernel.org>
Cc: Song Liu <song@kernel.org>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Yanteng Si <siyanteng@loongson.cn>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Link: https://lore.kernel.org/r/20231024222353.3024098-3-irogers@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2023-10-25 13:36:20 -07:00
Ian Rogers
7a8f349e9d perf rwsem: Add debug mode that uses a mutex
Mutex error check will capture trying to take the lock recursively and
other problems that rwlock won't. At the expense of concurrency, adda
debug mode that uses a mutex in place of a rwsem.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: K Prateek Nayak <kprateek.nayak@amd.com>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sandipan Das <sandipan.das@amd.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: German Gomez <german.gomez@arm.com>
Cc: James Clark <james.clark@arm.com>
Cc: Nick Terrell <terrelln@fb.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Changbin Du <changbin.du@huawei.com>
Cc: liuwenyu <liuwenyu7@huawei.com>
Cc: Yang Jihong <yangjihong1@huawei.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Miguel Ojeda <ojeda@kernel.org>
Cc: Song Liu <song@kernel.org>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Yanteng Si <siyanteng@loongson.cn>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Link: https://lore.kernel.org/r/20231024222353.3024098-2-irogers@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2023-10-25 13:35:35 -07:00
Christian Brauner
61d4fb0b34
file, i915: fix file reference for mmap_singleton()
Today we got a report at [1] for rcu stalls on the i915 testsuite in [2]
due to the conversion of files to SLAB_TYPSSAFE_BY_RCU. Afaict,
get_file_rcu() goes into an infinite loop trying to carefully verify
that i915->gem.mmap_singleton hasn't changed - see the splat below.

So I stared at this code to figure out what it actually does. It seems
that the i915->gem.mmap_singleton pointer itself never had rcu semantics.

The i915->gem.mmap_singleton is replaced in
file->f_op->release::singleton_release():

        static int singleton_release(struct inode *inode, struct file *file)
        {
                struct drm_i915_private *i915 = file->private_data;

                cmpxchg(&i915->gem.mmap_singleton, file, NULL);
                drm_dev_put(&i915->drm);

                return 0;
        }

The cmpxchg() is ordered against a concurrent update of
i915->gem.mmap_singleton from mmap_singleton(). IOW, when
mmap_singleton() fails to get a reference on i915->gem.mmap_singleton:

While mmap_singleton() does

        rcu_read_lock();
        file = get_file_rcu(&i915->gem.mmap_singleton);
        rcu_read_unlock();

it allocates a new file via anon_inode_getfile() and does

        smp_store_mb(i915->gem.mmap_singleton, file);

So, then what happens in the case of this bug is that at some point
fput() is called and drops the file->f_count to zero leaving the pointer
in i915->gem.mmap_singleton in tact.

Now, there might be delays until
file->f_op->release::singleton_release() is called and
i915->gem.mmap_singleton is set to NULL.

Say concurrently another task hits mmap_singleton() and does:

        rcu_read_lock();
        file = get_file_rcu(&i915->gem.mmap_singleton);
        rcu_read_unlock();

When get_file_rcu() fails to get a reference via atomic_inc_not_zero()
it will try the reload from i915->gem.mmap_singleton expecting it to be
NULL, assuming it has comparable semantics as we expect in
__fget_files_rcu().

But it hasn't so it reloads the same pointer again, trying the same
atomic_inc_not_zero() again and doing so until
file->f_op->release::singleton_release() of the old file has been
called.

So, in contrast to __fget_files_rcu() here we want to not retry when
atomic_inc_not_zero() has failed. We only want to retry in case we
managed to get a reference but the pointer did change on reload.

<3> [511.395679] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
<3> [511.395716] rcu:   Tasks blocked on level-1 rcu_node (CPUs 0-9): P6238
<3> [511.395934] rcu:   (detected by 16, t=65002 jiffies, g=123977, q=439 ncpus=20)
<6> [511.395944] task:i915_selftest   state:R  running task     stack:10568 pid:6238  tgid:6238  ppid:1001   flags:0x00004002
<6> [511.395962] Call Trace:
<6> [511.395966]  <TASK>
<6> [511.395974]  ? __schedule+0x3a8/0xd70
<6> [511.395995]  ? asm_sysvec_apic_timer_interrupt+0x1a/0x20
<6> [511.396003]  ? lockdep_hardirqs_on+0xc3/0x140
<6> [511.396013]  ? asm_sysvec_apic_timer_interrupt+0x1a/0x20
<6> [511.396029]  ? get_file_rcu+0x10/0x30
<6> [511.396039]  ? get_file_rcu+0x10/0x30
<6> [511.396046]  ? i915_gem_object_mmap+0xbc/0x450 [i915]
<6> [511.396509]  ? i915_gem_mmap+0x272/0x480 [i915]
<6> [511.396903]  ? mmap_region+0x253/0xb60
<6> [511.396925]  ? do_mmap+0x334/0x5c0
<6> [511.396939]  ? vm_mmap_pgoff+0x9f/0x1c0
<6> [511.396949]  ? rcu_is_watching+0x11/0x50
<6> [511.396962]  ? igt_mmap_offset+0xfc/0x110 [i915]
<6> [511.397376]  ? __igt_mmap+0xb3/0x570 [i915]
<6> [511.397762]  ? igt_mmap+0x11e/0x150 [i915]
<6> [511.398139]  ? __trace_bprintk+0x76/0x90
<6> [511.398156]  ? __i915_subtests+0xbf/0x240 [i915]
<6> [511.398586]  ? __pfx___i915_live_setup+0x10/0x10 [i915]
<6> [511.399001]  ? __pfx___i915_live_teardown+0x10/0x10 [i915]
<6> [511.399433]  ? __run_selftests+0xbc/0x1a0 [i915]
<6> [511.399875]  ? i915_live_selftests+0x4b/0x90 [i915]
<6> [511.400308]  ? i915_pci_probe+0x106/0x200 [i915]
<6> [511.400692]  ? pci_device_probe+0x95/0x120
<6> [511.400704]  ? really_probe+0x164/0x3c0
<6> [511.400715]  ? __pfx___driver_attach+0x10/0x10
<6> [511.400722]  ? __driver_probe_device+0x73/0x160
<6> [511.400731]  ? driver_probe_device+0x19/0xa0
<6> [511.400741]  ? __driver_attach+0xb6/0x180
<6> [511.400749]  ? __pfx___driver_attach+0x10/0x10
<6> [511.400756]  ? bus_for_each_dev+0x77/0xd0
<6> [511.400770]  ? bus_add_driver+0x114/0x210
<6> [511.400781]  ? driver_register+0x5b/0x110
<6> [511.400791]  ? i915_init+0x23/0xc0 [i915]
<6> [511.401153]  ? __pfx_i915_init+0x10/0x10 [i915]
<6> [511.401503]  ? do_one_initcall+0x57/0x270
<6> [511.401515]  ? rcu_is_watching+0x11/0x50
<6> [511.401521]  ? kmalloc_trace+0xa3/0xb0
<6> [511.401532]  ? do_init_module+0x5f/0x210
<6> [511.401544]  ? load_module+0x1d00/0x1f60
<6> [511.401581]  ? init_module_from_file+0x86/0xd0
<6> [511.401590]  ? init_module_from_file+0x86/0xd0
<6> [511.401613]  ? idempotent_init_module+0x17c/0x230
<6> [511.401639]  ? __x64_sys_finit_module+0x56/0xb0
<6> [511.401650]  ? do_syscall_64+0x3c/0x90
<6> [511.401659]  ? entry_SYSCALL_64_after_hwframe+0x6e/0xd8
<6> [511.401684]  </TASK>

Link: [1]: https://lore.kernel.org/intel-gfx/SJ1PR11MB6129CB39EED831784C331BAFB9DEA@SJ1PR11MB6129.namprd11.prod.outlook.com
Link: [2]: https://intel-gfx-ci.01.org/tree/linux-next/next-20231013/bat-dg2-11/igt@i915_selftest@live@mman.html#dmesg-warnings10963
Cc: Jann Horn <jannh@google.com>,
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lore.kernel.org/r/20231025-formfrage-watscheln-84526cd3bd7d@brauner
Signed-off-by: Christian Brauner <brauner@kernel.org>
2023-10-25 22:17:04 +02:00
Nik Bune
a31226cdc8 dt-bindings: watchdog: cnxt,cx92755-wdt: convert txt to yaml
Convert txt file to yaml.
Add maintainers list.

Signed-off-by: Nik Bune <n2h9z4@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20231023202622.18558-1-n2h9z4@gmail.com
Signed-off-by: Rob Herring <robh@kernel.org>
2023-10-25 15:03:32 -05:00
Nik Bune
bd888a4377 dt-bindings: watchdog: da9062-wdt: convert txt to yaml
Convert txt file to yaml.
Add a mainterner block. Took a value from dlg,da9063 PMIC.

Signed-off-by: Nik Bune <n2h9z4@gmail.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20231014170434.159310-1-n2h9z4@gmail.com
Signed-off-by: Rob Herring <robh@kernel.org>
2023-10-25 15:03:32 -05:00
Fabio Estevam
7b43addcd1 dt-bindings: watchdog: fsl,scu-wdt: Document imx8dl
imx8dxl also contains the SCU watchdog block.

Add an entry for 'fsl,imx8dxl-sc-wdt'.

Cc: Wim Van Sebroeck <wim@linux-watchdog.org>
Cc: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Fabio Estevam <festevam@denx.de>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20231004182043.2309790-1-festevam@gmail.com
Signed-off-by: Rob Herring <robh@kernel.org>
2023-10-25 15:03:32 -05:00
Nik Bune
22c3888e55 dt-bindings: watchdog: atmel,at91rm9200-wdt: convert txt to yaml
Convert txt file to yaml.

Signed-off-by: Nik Bune <n2h9z4@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230924181959.64264-1-n2h9z4@gmail.com
Signed-off-by: Rob Herring <robh@kernel.org>
2023-10-25 15:03:31 -05:00
Zev Weiss
920057ad52 hwmon: (nct6775) Fix incorrect variable reuse in fan_div calculation
In the regmap conversion in commit 4ef2774511 ("hwmon: (nct6775)
Convert register access to regmap API") I reused the 'reg' variable
for all three register reads in the fan speed calculation loop in
nct6775_update_device(), but failed to notice that the value from the
first one (data->REG_FAN[i]) is actually used in the call to
nct6775_select_fan_div() at the end of the loop body.  Since that
patch the register value passed to nct6775_select_fan_div() has been
(conditionally) incorrectly clobbered with the value of a different
register than intended, which has in at least some cases resulted in
fan speeds being adjusted down to zero.

Fix this by using dedicated temporaries for the two intermediate
register reads instead of 'reg'.

Signed-off-by: Zev Weiss <zev@bewilderbeest.net>
Fixes: 4ef2774511 ("hwmon: (nct6775) Convert register access to regmap API")
Reported-by: Thomas Zajic <zlatko@gmx.at>
Tested-by: Thomas Zajic <zlatko@gmx.at>
Cc: stable@vger.kernel.org # v5.19+
Link: https://lore.kernel.org/r/20230929200822.964-2-zev@bewilderbeest.net
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2023-10-25 12:52:57 -07:00
Marc Zyngier
f199bf5bf8 irqchip/gic-v3-its: Don't override quirk settings with default values
When splitting the allocation of the ITS node from its configuration,
some of the default settings were kept in the latter instead of
being moved to the former.

This has the side effect of negating some of the quirk detections that
have happened in between, amongst which the dreaded Synquacer hack
(that also affect Dominic's TI platform).

Move the initialisation of these fields early, so that they can again be
overriden by the Synquacer quirk.

Fixes: 9585a495ac ("irqchip/gic-v3-its: Split allocation from initialisation of its_node")
Reported by: Dominic Rath <dominic.rath@ibv-augsburg.net>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Dominic Rath <dominic.rath@ibv-augsburg.net>
Link: https://lore.kernel.org/r/20231024084831.GA3788@JADEVM-DRA
Link: https://lore.kernel.org/r/20231024143431.2144579-1-maz@kernel.org
2023-10-25 21:44:49 +02:00
Jakub Kicinski
8846f9a04b Merge branch 'mptcp-features-and-fixes-for-v6-7'
Mat Martineau says:

====================
mptcp: Features and fixes for v6.7

Patch 1 adds a configurable timeout for the MPTCP connection when all
subflows are closed, to support break-before-make use cases.

Patch 2 is a fix for a 1-byte error in rx data counters with MPTCP
fastopen connections.

Patch 3 is a minor code cleanup.

Patches 4 & 5 add handling of rcvlowat for MPTCP sockets, with a
prerequisite patch to use a common scaling ratio between TCP and MPTCP.

Patch 6 improves efficiency of memory copying in MPTCP transmit code.

Patch 7 refactors syncing of socket options from the MPTCP socket to
its subflows.

Patches 8 & 9 help the MPTCP packet scheduler perform well by changing
the handling of notsent_lowat in subflows and how available buffer space
is calculated for MPTCP-level sends.
====================

Link: https://lore.kernel.org/r/20231023-send-net-next-20231023-2-v1-0-9dc60939d371@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2023-10-25 12:23:37 -07:00
Paolo Abeni
8005184fd1 mptcp: refactor sndbuf auto-tuning
The MPTCP protocol account for the data enqueued on all the subflows
to the main socket send buffer, while the send buffer auto-tuning
algorithm set the main socket send buffer size as the max size among
the subflows.

That causes bad performances when at least one subflow is sndbuf
limited, e.g. due to very high latency, as the MPTCP scheduler can't
even fill such buffer.

Change the send-buffer auto-tuning algorithm to compute the main socket
send buffer size as the sum of all the subflows buffer size.

Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <martineau@kernel.org>
Link: https://lore.kernel.org/r/20231023-send-net-next-20231023-2-v1-9-9dc60939d371@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2023-10-25 12:23:35 -07:00
Paolo Abeni
9fdc779331 mptcp: ignore notsent_lowat setting at the subflow level
Any latency related tuning taking action at the subflow level does
not really affect the user-space, as only the main MPTCP socket is
relevant.

Anyway any limiting setting may foul the MPTCP scheduler, not being
able to fully use the subflow-level cwin, leading to very poor b/w
usage.

Enforce notsent_lowat to be a no-op on every subflow.

Note that TCP_NOTSENT_LOWAT is currently not supported, and properly
dealing with that will require more invasive changes.

Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <martineau@kernel.org>
Link: https://lore.kernel.org/r/20231023-send-net-next-20231023-2-v1-8-9dc60939d371@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2023-10-25 12:23:34 -07:00
Paolo Abeni
a1ab24e5fc mptcp: consolidate sockopt synchronization
Move the socket option synchronization for active subflows
at subflow creation time. This allows removing the now unused
unlocked variant of such helper.

While at that, clean-up a bit the mptcp_subflow_create_socket()
errors path.

Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <martineau@kernel.org>
Link: https://lore.kernel.org/r/20231023-send-net-next-20231023-2-v1-7-9dc60939d371@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2023-10-25 12:23:34 -07:00
Paolo Abeni
0ffe8e7490 mptcp: use copy_from_iter helpers on transmit
The perf traces show an high cost for the MPTCP transmit path memcpy.

It turn out that the helper currently in use carries quite a bit
of unneeded overhead, e.g. to map/unmap the memory pages.

Moving to the 'copy_from_iter' variant removes such overhead and
additionally gains the no-cache support.

Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <martineau@kernel.org>
Link: https://lore.kernel.org/r/20231023-send-net-next-20231023-2-v1-6-9dc60939d371@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2023-10-25 12:23:34 -07:00
Paolo Abeni
5684ab1a0e mptcp: give rcvlowat some love
The MPTCP protocol allow setting sk_rcvlowat, but the value there
is currently ignored.

Additionally, the default subflows sk_rcvlowat basically disables per
subflow delayed ack: the MPTCP protocol move the incoming data from the
subflows into the msk socket as soon as the TCP stacks invokes the subflow
data_ready callback. Later, when __tcp_ack_snd_check() takes action,
the subflow-level copied_seq matches rcv_nxt, and that mandate for an
immediate ack.

Let the mptcp receive path be aware of such threshold, explicitly tracking
the amount of data available to be ready and checking vs sk_rcvlowat in
mptcp_poll() and before waking-up readers.

Additionally implement the set_rcvlowat() callback, to properly handle
the rcvbuf auto-tuning on sk_rcvlowat changes.

Finally to properly handle delayed ack, force the subflow level threshold
to 0 and instead explicitly ask for an immediate ack when the msk level th
is not reached.

Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <martineau@kernel.org>
Link: https://lore.kernel.org/r/20231023-send-net-next-20231023-2-v1-5-9dc60939d371@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2023-10-25 12:23:34 -07:00
Paolo Abeni
849ee75a38 tcp: define initial scaling factor value as a macro
So that other users could access it. Notably MPTCP will use
it in the next patch.

No functional change intended.

Acked-by: Matthieu Baerts <matttbe@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <martineau@kernel.org>
Link: https://lore.kernel.org/r/20231023-send-net-next-20231023-2-v1-4-9dc60939d371@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2023-10-25 12:23:34 -07:00
Paolo Abeni
f1f26512a9 mptcp: use plain bool instead of custom binary enum
The 'data_avail' subflow field is already used as plain boolean,
drop the custom binary enum type and switch to bool.

No functional changed intended.

Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <martineau@kernel.org>
Link: https://lore.kernel.org/r/20231023-send-net-next-20231023-2-v1-3-9dc60939d371@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2023-10-25 12:23:34 -07:00
Paolo Abeni
bf0e96108f mptcp: properly account fastopen data
Currently the socket level counter aggregating the received data
does not take in account the data received via fastopen.

Address the issue updating the counter as required.

Fixes: 38967f424b ("mptcp: track some aggregate data counters")
Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <martineau@kernel.org>
Link: https://lore.kernel.org/r/20231023-send-net-next-20231023-2-v1-2-9dc60939d371@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2023-10-25 12:23:34 -07:00
Paolo Abeni
d866ae9aaa mptcp: add a new sysctl for make after break timeout
The MPTCP protocol allows sockets with no alive subflows to stay
in ESTABLISHED status for and user-defined timeout, to allow for
later subflows creation.

Currently such timeout is constant - TCP_TIMEWAIT_LEN. Let the
user-space configure them via a newly added sysctl, to better cope
with busy servers and simplify (make them faster) the relevant
pktdrill tests.

Note that the new know does not apply to orphaned MPTCP socket
waiting for the data_fin handshake completion: they always wait
TCP_TIMEWAIT_LEN.

Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <martineau@kernel.org>
Link: https://lore.kernel.org/r/20231023-send-net-next-20231023-2-v1-1-9dc60939d371@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2023-10-25 12:23:33 -07:00
Zhang Rui
bbfff736d3 hwmon: (coretemp) Fix potentially truncated sysfs attribute name
When build with W=1 and "-Werror=format-truncation", below error is
observed in coretemp driver,

   drivers/hwmon/coretemp.c: In function 'create_core_data':
>> drivers/hwmon/coretemp.c:393:34: error: '%s' directive output may be truncated writing likely 5 or more bytes into a region of size between 3 and 13 [-Werror=format-truncation=]
     393 |                          "temp%d_%s", attr_no, suffixes[i]);
         |                                  ^~
   drivers/hwmon/coretemp.c:393:26: note: assuming directive output of 5 bytes
     393 |                          "temp%d_%s", attr_no, suffixes[i]);
         |                          ^~~~~~~~~~~
   drivers/hwmon/coretemp.c:392:17: note: 'snprintf' output 7 or more bytes (assuming 22) into a destination of size 19
     392 |                 snprintf(tdata->attr_name[i], CORETEMP_NAME_LENGTH,
         |                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     393 |                          "temp%d_%s", attr_no, suffixes[i]);
         |                          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   cc1: all warnings being treated as errors

Given that
1. '%d' could take 10 charactors,
2. '%s' could take 10 charactors ("crit_alarm"),
3. "temp", "_" and the NULL terminator take 6 charactors,
fix the problem by increasing CORETEMP_NAME_LENGTH to 28.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Fixes: 7108b80a54 ("hwmon/coretemp: Handle large core ID value")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202310200443.iD3tUbbK-lkp@intel.com/
Link: https://lore.kernel.org/r/20231025122316.836400-1-rui.zhang@intel.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2023-10-25 11:57:54 -07:00
Dragos Bogdan
2a5b3370a1 hwmon: (axi-fan-control) Fix possible NULL pointer dereference
axi_fan_control_irq_handler(), dependent on the private
axi_fan_control_data structure, might be called before the hwmon
device is registered. That will cause an "Unable to handle kernel
NULL pointer dereference" error.

Fixes: 8412b410fa ("hwmon: Support ADI Fan Control IP")
Signed-off-by: Dragos Bogdan <dragos.bogdan@analog.com>
Signed-off-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20231025132100.649499-1-nuno.sa@analog.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2023-10-25 11:56:22 -07:00
Matthew Wilcox (Oracle)
82dd620653 ext2: Convert ext2_prepare_chunk and ext2_commit_chunk to folios
All callers now have a folio, so pass it in.  Saves one call to
compound_head().

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Jan Kara <jack@suse.cz>
2023-10-25 20:31:51 +02:00
Matthew Wilcox (Oracle)
da3a849a5c ext2: Convert ext2_make_empty() to use a folio
Remove two hidden calls to compound_head() by using the folio API.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Jan Kara <jack@suse.cz>
Message-Id: <20230921200746.3303942-9-willy@infradead.org>
2023-10-25 20:31:29 +02:00
Matthew Wilcox (Oracle)
c2d20492e2 ext2: Convert ext2_unlink() and ext2_rename() to use folios
This involves changing ext2_find_entry(), ext2_dotdot(),
ext2_inode_by_name(), ext2_set_link() and ext2_delete_entry() to
take a folio.  These were also the last users of ext2_get_page() and
ext2_put_page(), so remove those at the same time.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Jan Kara <jack@suse.cz>
Message-Id: <20230921200746.3303942-8-willy@infradead.org>
2023-10-25 20:31:29 +02:00
Matthew Wilcox (Oracle)
7e56bbf15d ext2: Convert ext2_delete_entry() to use folios
Save some calls to compound_head() by using the folio API.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Jan Kara <jack@suse.cz>
Message-Id: <20230921200746.3303942-7-willy@infradead.org>
2023-10-25 20:28:33 +02:00
Matthew Wilcox (Oracle)
f4b830cfce ext2: Convert ext2_empty_dir() to use a folio
Save two calls to compound_head() by using the folio API.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Jan Kara <jack@suse.cz>
Message-Id: <20230921200746.3303942-6-willy@infradead.org>
2023-10-25 20:19:01 +02:00
Matthew Wilcox (Oracle)
1de0736c3a ext2: Convert ext2_add_link() to use a folio
Remove five hidden calls to compound_head() and fix a couple of
places that assumed PAGE_SIZE.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Jan Kara <jack@suse.cz>
Message-Id: <20230921200746.3303942-5-willy@infradead.org>
2023-10-25 20:19:01 +02:00