When configuration changes are made, the new value is written to struct
rdt_domain's new_ctrl field and the have_new_ctrl flag is set. Later
new_ctrl is copied to hardware by a call to update_domains().

Once the CDP resources are merged, there will be one new_ctrl field in
use by two struct resctrl_schema requiring a per-schema IPI to copy the
value to hardware.

Move new_ctrl and have_new_ctrl into a new struct resctrl_staged_config.
Before the CDP resources can be merged, struct rdt_domain will need an
array of these, one per type of configuration. Using the type as an
index to the array will ensure that a schema configuration string can't
specify the same domain twice.
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Jamie Iles <jamie@nuviainc.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Link: https://lkml.kernel.org/r/20210728170637.25610-14-james.morse@arm.com

resctrl 'info' directories and schema parsing use the schema name.
This lives in the struct rdt_resource, and is specified by the
architecture code.

Once the CDP resources are merged, there will only be one resource (and
one name) in use by two schemata. To allow the CDP CODE/DATA property to
be the type of configuration the schema uses, the name should also be
per-schema.

Add a name field to struct resctrl_schema, and use this wherever
the schema name is exposed (or read from) user-space. Calculating
max_name_width for padding the schemata file also moves as this is
visible to user-space. As the names in struct rdt_resource already
include the CDP information, schemata_list_create() copies them.

schemata_list_create() includes the length of the CDP suffix when
calculating max_name_width in preparation for CDP resources being
merged.
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Jamie Iles <jamie@nuviainc.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Link: https://lkml.kernel.org/r/20210728170637.25610-13-james.morse@arm.com

Whether CDP is enabled for a hardware resource like the L3 cache can be
found by inspecting the alloc_enabled flags of the L3CODE/L3DATA struct
rdt_hw_resources, even if they aren't in use.

Once these resources are merged, the flags can't be compared. Whether
CDP is enabled needs tracking explicitly. If another architecture is
emulating CDP the behaviour may not be per-resource. 'cdp_capable' needs
to be visible to resctrl, even if its not in use, as this affects the
padding of the schemata table visible to user-space.

Add cdp_enabled to struct rdt_hw_resource and cdp_capable to struct
rdt_resource. Add resctrl_arch_set_cdp_enabled() to let resctrl enable
or disable CDP on a resource. resctrl_arch_get_cdp_enabled() lets it
read the current state.
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Jamie Iles <jamie@nuviainc.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Link: https://lkml.kernel.org/r/20210728170637.25610-12-james.morse@arm.com

struct pseudo_lock_region points to the rdt_resource.

Once the resources are merged, this won't be unique. The resource name
is moving into the schema, so that the filesystem portions of resctrl can
generate it.

Swap pseudo_lock_region's rdt_resource pointer for a schema pointer.
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Jamie Iles <jamie@nuviainc.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Link: https://lkml.kernel.org/r/20210728170637.25610-11-james.morse@arm.com

Once the CDP resources are merged, there will be two struct
resctrl_schema for one struct rdt_resource. CDP becomes a type of
configuration that belongs to the schema.

Helpers like rdtgroup_cbm_overlaps() need access to the schema to query
the configuration (or configurations) based on schema properties.

Change these functions to take a struct schema instead of the struct
rdt_resource. All the modified functions are part of the filesystem code
that will move to /fs/resctrl once it is possible to support a second
architecture.
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Jamie Iles <jamie@nuviainc.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Link: https://lkml.kernel.org/r/20210728170637.25610-10-james.morse@arm.com

To initialise struct resctrl_schema's num_closid, schemata_list_create()
reaches into the architectures private structure to retrieve num_closid
from the struct rdt_hw_resource. The 'half the closids' behaviour should
be part of the filesystem parts of resctrl that are the same on any
architecture. struct resctrl_schema's num_closid should include any
correction for CDP.

Having two properties called num_closid is likely to be confusing when
they have different values.

Add a helper to read the resource's num_closid from the arch code.
This should return the number of closid that the resource supports,
regardless of whether CDP is in use. Once the CDP resources are merged,
schemata_list_create() can apply the correction itself.

Using a type with an obvious size for the arch helper means changing the
type of num_closid to u32, which matches the type already used by struct
rdtgroup.

reset_all_ctrls() does not use resctrl_arch_get_num_closid(), even
though it sets up a structure for modifying the hardware. This function
will be part of the architecture code, the maximum closid should be the
maximum value the hardware has, regardless of the way resctrl is using
it. All the uses of num_closid in core.c are naturally part of the
architecture specific code.
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Jamie Iles <jamie@nuviainc.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Link: https://lkml.kernel.org/r/20210728170637.25610-9-james.morse@arm.com

Struct resctrl_schema holds properties that vary with the style of
configuration that resctrl applies to a resource. There are already
two values for the hardware's num_closid, depending on whether the
architecture presents the L3 or L3CODE/L3DATA resources.

As the way CDP changes the number of control groups that resctrl can
create is part of the user-space interface, it should be managed by the
filesystem parts of resctrl. This allows the architecture code to only
describe the value the hardware supports.

Add num_closid to resctrl_schema. This is the value seen by the
filesystem, which may be different to the maximum value described by the
arch code when CDP is enabled.

These functions operate on the num_closid value that is exposed to
user-space:

  * rdtgroup_parse_resource()
  * rdtgroup_schemata_show()
  * rdt_num_closids_show()
  * closid_init()

Change them to use the schema value instead. schemata_list_create() sets
this value, and reaches into the architecture-specific structure to get
the value. This will eventually be replaced with a helper.
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Jamie Iles <jamie@nuviainc.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Link: https://lkml.kernel.org/r/20210728170637.25610-8-james.morse@arm.com

When parsing a schema configuration value from user-space, resctrl walks
the architectures rdt_resources_all[] array to find a matching struct
rdt_resource.

Once the CDP resources are merged there will be one resource in use
by two schemata. Anything walking rdt_resources_all[] on behalf of a
user-space request should walk the list of struct resctrl_schema
instead.

Change the users of for_each_alloc_enabled_rdt_resource() to walk the
schema instead. Schemata were only created for alloc_enabled resources
so these two lists are currently equivalent.

schemata_list_create() and rdt_kill_sb() are ignored. The first
creates the schema list, and will eventually loop over the resource
indexes using an arch helper to retrieve the resource. rdt_kill_sb()
will eventually make use of an arch 'reset everything' helper.

After the filesystem code is moved, rdtgroup_pseudo_locked_in_hierarchy()
remains part of the x86 specific hooks to support pseudo lock. This
code walks each domain, and still does this after the separate resources
are merged.
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Jamie Iles <jamie@nuviainc.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Link: https://lkml.kernel.org/r/20210728170637.25610-7-james.morse@arm.com

The names of resources are used for the schema name presented to
user-space. The name used is rooted in a structure provided by the
architecture code because the names are different when CDP is enabled.
x86 implements this by swapping between two sets of resource structures
based on their alloc_enabled flag. The type of configuration in-use is
encoded in the name (and cbm_idx_offset).

Once the CDP behaviour is moved into the parts of resctrl that will
move to /fs/, there will be two struct resctrl_schema for one struct
rdt_resource. The schema describes the type of configuration being
applied to the resource. The name of the schema should be generated
by resctrl, base on the type of configuration. To do this struct
resctrl_schema needs to store the type of configuration in use for a
schema.

Create an enum resctrl_conf_type describing the options, and add it to
struct resctrl_schema. The underlying resources are still separate, as
cbm_idx_offset is still in use.

Temporarily label all the entries in rdt_resources_all[] and copy that
value to struct resctrl_schema. Copying the value ensures there is no
mismatch while the filesystem parts of resctrl are modified to use the
schema. Once the resources are merged, the filesystem code can assign
this value based on the schema being created.
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Jamie Iles <jamie@nuviainc.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Link: https://lkml.kernel.org/r/20210728170637.25610-6-james.morse@arm.com

Many of resctrl's per-schema files return a value from struct
rdt_resource, which they take as their 'priv' pointer.

Moving properties that resctrl exposes to user-space into the core 'fs'
code, (e.g. the name of the schema), means some of the functions that
back the filesystem need the schema struct (to where the properties are
moved), but currently take struct rdt_resource. For example, once the
CDP resources are merged, struct rdt_resource no longer reflects all the
properties of the schema.

For the info dirs that represent a control, the information needed
will be accessed via struct resctrl_schema, as this is how the resource
is being used. For the monitors, its still struct rdt_resource as the
monitors aren't described as schema.

This difference means the type of the private pointers varies between
control and monitor info dirs.

Change the 'priv' pointer to point to struct resctrl_schema for
the per-schema files that represent a control. The type can be
determined from the fflags field. If the flags are RF_MON_INFO, its
a struct rdt_resource. If the flags are RF_CTRL_INFO, its a struct
resctrl_schema. No entry in res_common_files[] has both flags.
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Jamie Iles <jamie@nuviainc.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Link: https://lkml.kernel.org/r/20210728170637.25610-5-james.morse@arm.com

Resctrl exposes schemata to user-space, which allow the control values
to be specified for a group of tasks.

User-visible properties of the interface, (such as the schemata names
and how the values are parsed) are rooted in a struct provided by the
architecture code. (struct rdt_hw_resource). Once a second architecture
uses resctrl, this would allow user-visible properties to diverge
between architectures.

These properties should come from the resctrl code that will be common
to all architectures. Resctrl has no per-schema structure, only struct
rdt_{hw_,}resource. Create a struct resctrl_schema to hold the
rdt_resource. Before a second architecture can be supported, this
structure will also need to hold the schema name visible to user-space
and the type of configuration values for resctrl.
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Jamie Iles <jamie@nuviainc.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Link: https://lkml.kernel.org/r/20210728170637.25610-4-james.morse@arm.com

resctrl is the defacto Linux ABI for SoC resource partitioning features.

To support it on another architecture, it needs to be abstracted from
the features provided by Intel RDT and AMD PQoS, and moved to /fs/.
struct rdt_domain contains a mix of architecture private details and
properties of the filesystem interface user-space uses.

Continue by splitting struct rdt_domain, into an architecture private
'hw' struct, which contains the common resctrl structure that would be
used by any architecture. The hardware values in ctrl_val and mbps_val
need to be accessed via helpers to allow another architecture to convert
these into a different format if necessary. After this split, filesystem
code paths touching a 'hw' struct indicates where an abstraction is
needed.

Splitting this structure only moves types around, and should not lead
to any change in behaviour.
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Jamie Iles <jamie@nuviainc.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Link: https://lkml.kernel.org/r/20210728170637.25610-3-james.morse@arm.com

resctrl is the defacto Linux ABI for SoC resource partitioning features.

To support it on another architecture, it needs to be abstracted from
the features provided by Intel RDT and AMD PQoS, and moved to /fs/.
struct rdt_resource contains a mix of architecture private details
and properties of the filesystem interface user-space uses.

Start by splitting struct rdt_resource, into an architecture private
'hw' struct, which contains the common resctrl structure that would be
used by any architecture. The foreach helpers are most commonly used by
the filesystem code, and should return the common resctrl structure.
for_each_rdt_resource() is changed to walk the common structure in its
parent arch private structure.

Move as much of the structure as possible into the common structure
in the core code's header file. The x86 hardware accessors remain
part of the architecture private code, as do num_closid, mon_scale
and mbm_width.

mon_scale and mbm_width are used to detect overflow of the hardware
counters, and convert them from their native size to bytes. Any
cross-architecture abstraction should be in terms of bytes, making
these properties private.

The hardware's num_closid is kept in the private structure to force the
filesystem code to use a helper to access it. MPAM would return a single
value for the system, regardless of the resource. Using the helper
prevents this field from being confused with the version of num_closid
that is being exposed to user-space (added in a later patch).

After this split, filesystem code touching a 'hw' struct indicates
where an abstraction is needed.

Splitting this structure only moves types around, and should not lead
to any change in behaviour.
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Jamie Iles <jamie@nuviainc.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Link: https://lkml.kernel.org/r/20210728170637.25610-2-james.morse@arm.com

Pull timer fix from Thomas Gleixner:
 "A single timer fix:

   - Prevent a memory ordering issue in the timer expiry code which
     makes it possible to observe falsely that the callback has been
     executed already while that's not the case, which violates the
     guarantee of del_timer_sync()"

* tag 'timers-urgent-2021-08-08' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  timers: Move clearing of base::timer_running under base:: Lock

Pull scheduler fix from Thomas Gleixner:
 "A single scheduler fix:

   - Prevent a double enqueue caused by rt_effective_prio() being
     invoked twice in __sched_setscheduler()"

* tag 'sched-urgent-2021-08-08' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/rt: Fix double enqueue caused by rt_effective_prio

Pull perf fixes from Thomas Gleixner:
 "A set of perf fixes:

   - Correct the permission checks for perf event which send SIGTRAP to
     a different process and clean up that code to be more readable.

   - Prevent an out of bound MSR access in the x86 perf code which
     happened due to an incomplete limiting to the actually available
     hardware counters.

   - Prevent access to the AMD64_EVENTSEL_HOSTONLY bit when running
     inside a guest.

   - Handle small core counter re-enabling correctly by issuing an ACK
     right before reenabling it to prevent a stale PEBS record being
     kept around"

* tag 'perf-urgent-2021-08-08' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/x86/intel: Apply mid ACK for small core
  perf/x86/amd: Don't touch the AMD64_EVENTSEL_HOSTONLY bit inside the guest
  perf/x86: Fix out of bound MSR access
  perf: Refactor permissions check into perf_check_permission()
  perf: Fix required permissions if sigtrap is requested

Pull char/misc driver fixes from Greg KH:
 "Here are some small char/misc driver fixes for 5.14-rc5.

  They resolve a few regressions that people reported:

   - acrn driver fix

   - fpga driver fix

   - interconnect tiny driver fixes

  All have been in linux-next for a while with no reported issues"

* tag 'char-misc-5.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  interconnect: Fix undersized devress_alloc allocation
  interconnect: qcom: icc-rpmh: Add BCMs to commit list in pre_aggregate
  interconnect: qcom: icc-rpmh: Ensure floor BW is enforced for all nodes
  fpga: dfl: fme: Fix cpu hotplug issue in performance reporting
  virt: acrn: Do hcall_destroy_vm() before resource release
  interconnect: Always call pre_aggregate before aggregate
  interconnect: Zero initial BW after sync-state

Merge tag 'driver-core-5.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core fixes from Greg KH:
 "Here are three tiny driver core and firmware loader fixes for
  5.14-rc5. They are:

   - driver core fix for when probing fails

   - firmware loader fixes for reported problems.

  All have been in linux-next for a while with no reported issues"

* tag 'driver-core-5.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
  firmware_loader: fix use-after-free in firmware_fallback_sysfs
  firmware_loader: use -ETIMEDOUT instead of -EAGAIN in fw_load_sysfs_fallback
  drivers core: Fix oops when driver probe fails

Pull staging driver fixes from Greg KH:
 "Here are a few small staging driver fixes for 5.14-rc5 to resolve some
  reported problems. They include:

   - mt7621 driver fix

   - rtl8723bs driver fixes

   - rtl8712 driver fixes.

  Nothing major, just small problems resolved.

  All have been in linux-next for a while with no reported issues"

* tag 'staging-5.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
  staging: mt7621-pci: avoid to re-disable clock for those pcies not in use
  staging: rtl8712: error handling refactoring
  staging: rtl8712: get rid of flush_scheduled_work
  staging: rtl8723bs: select CONFIG_CRYPTO_LIB_ARC4
  staging: rtl8723bs: Fix a resource leak in sd_int_dpc

Pull tty/serial fixes from Greg KH:
 "Here are some small tty/serial driver fixes for 5.14-rc5 to resolve a
  number of reported problems.

  They include:

   - mips serial driver fixes

   - 8250 driver fixes for reported problems

   - fsl_lpuart driver fixes

   - other tiny driver fixes

  All have been in linux-next for a while with no reported problems"

* tag 'tty-5.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  serial: 8250_pci: Avoid irq sharing for MSI(-X) interrupts.
  serial: 8250_mtk: fix uart corruption issue when rx power off
  tty: serial: fsl_lpuart: fix the wrong return value in lpuart32_get_mctrl
  serial: 8250_pci: Enumerate Elkhart Lake UARTs via dedicated driver
  serial: 8250: fix handle_irq locking
  serial: tegra: Only print FIFO error message when an error occurs
  MIPS: Malta: Do not byte-swap accesses to the CBUS UART
  serial: 8250: Mask out floating 16/32-bit bus bits
  serial: max310x: Unprepare and disable clock in error path

Pull USB driver fixes from Greg KH:
 "Here are some small USB driver fixes for 5.14-rc5. They resolve a
  number of small reported issues, including:

   - cdnsp driver fixes

   - usb serial driver fixes and device id updates

   - usb gadget hid fixes

   - usb host driver fixes

   - usb dwc3 driver fixes

   - other usb gadget driver fixes

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

* tag 'usb-5.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (21 commits)
  usb: typec: tcpm: Keep other events when receiving FRS and Sourcing_vbus events
  usb: dwc3: gadget: Avoid runtime resume if disabling pullup
  usb: dwc3: gadget: Use list_replace_init() before traversing lists
  USB: serial: ftdi_sio: add device ID for Auto-M3 OP-COM v2
  USB: serial: pl2303: fix GT type detection
  USB: serial: option: add Telit FD980 composition 0x1056
  USB: serial: pl2303: fix HX type detection
  USB: serial: ch341: fix character loss at high transfer rates
  usb: cdnsp: Fix the IMAN_IE_SET and IMAN_IE_CLEAR macro
  usb: cdnsp: Fixed issue with ZLP
  usb: cdnsp: Fix incorrect supported maximum speed
  usb: cdns3: Fixed incorrect gadget state
  usb: gadget: f_hid: idle uses the highest byte for duration
  Revert "thunderbolt: Hide authorized attribute if router does not support PCIe tunnels"
  usb: otg-fsm: Fix hrtimer list corruption
  usb: host: ohci-at91: suspend/resume ports after/before OHCI accesses
  usb: musb: Fix suspend and resume issues for PHYs on I2C and SPI
  usb: gadget: f_hid: added GET_IDLE and SET_IDLE handlers
  usb: gadget: f_hid: fixed NULL pointer dereference
  usb: gadget: remove leaked entry from udc driver list
  ...

Pull io_uring from Jens Axboe:
 "A few io-wq related fixes:

   - Fix potential nr_worker race and missing max_workers check from one
     path (Hao)

   - Fix race between worker exiting and new work queue (me)"

* tag 'io_uring-5.14-2021-08-07' of git://git.kernel.dk/linux-block:
  io-wq: fix lack of acct->nr_workers < acct->max_workers judgement
  io-wq: fix no lock protection of acct->nr_worker
  io-wq: fix race between worker exiting and activating free worker

Pull block fixes from Jens Axboe:
 "A few minor fixes:

   - Fix ldm kernel-doc warning (Bart)

   - Fix adding offset twice for DMA address in n64cart (Christoph)

   - Fix use-after-free in dasd path handling (Stefan)

   - Order kyber insert trace correctly (Vincent)

   - raid1 errored write handling fix (Wei)

   - Fix blk-iolatency queue get failure handling (Yu)"

* tag 'block-5.14-2021-08-07' of git://git.kernel.dk/linux-block:
  kyber: make trace_block_rq call consistent with documentation
  block/partitions/ldm.c: Fix a kernel-doc warning
  blk-iolatency: error out if blk_get_queue() failed in iolatency_set_limit()
  n64cart: fix the dma address in n64cart_do_bvec
  s390/dasd: fix use after free in dasd path handling
  md/raid10: properly indicate failure when ending a failed write request

Pull RISC-V fixes from Palmer Dabbelt:

 - avoid dereferencing a null task pointer while walking the stack

 - fix the memory size in the HiFive Unleashed device tree

 - disable stack protectors when randstruct is enabled, which results in
   non-deterministic offsets during module builds

 - a pair of fixes to avoid relying on a constant physical memory base
   for the non-XIP builds

* tag 'riscv-for-linus-5.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  Revert "riscv: Remove CONFIG_PHYS_RAM_BASE_FIXED"
  riscv: Get rid of CONFIG_PHYS_RAM_BASE in kernel physical address conversion
  riscv: Disable STACKPROTECTOR_PER_TASK if GCC_PLUGIN_RANDSTRUCT is enabled
  riscv: dts: fix memory size for the SiFive HiFive Unmatched
  riscv: stacktrace: Fix NULL pointer dereference

Merge tag 'kbuild-fixes-v5.14-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild fixes from Masahiro Yamada:

 - Correct the Extended Regular Expressions in tools

 - Adjust scripts/checkversion.pl for the current Kbuild

 - Unset sub_make_done for 'make install' to make DKMS work again

* tag 'kbuild-fixes-v5.14-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
  kbuild: cancel sub_make_done for the install target to fix DKMS
  scripts: checkversion: modernize linux/version.h search strings
  mips: Fix non-POSIX regexp
  x86/tools/relocs: Fix non-POSIX regexp

This reverts commit 9b79878c.

The removal of this config exposes CONFIG_PHYS_RAM_BASE for all kernel
types: this value being implementation-specific, this breaks the
genericity of the RISC-V kernel so revert it.
Signed-off-by: Alexandre Ghiti <alex@ghiti.fr>
Tested-by: Emil Renner Berthing <kernel@esmil.dk>
Reviewed-by: Jisheng Zhang <jszhang@kernel.org>
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

The usage of CONFIG_PHYS_RAM_BASE for all kernel types was a mistake:
this value is implementation-specific and this breaks the genericity of
the RISC-V kernel.

Fix this by introducing a new variable phys_ram_base that holds this
value at runtime and use it in the kernel physical address conversion
macro. Since this value is used only for XIP kernels, evaluate it only if
CONFIG_XIP_KERNEL is set which in addition optimizes this macro for
standard kernels at compile-time.
Signed-off-by: Alexandre Ghiti <alex@ghiti.fr>
Tested-by: Emil Renner Berthing <kernel@esmil.dk>
Reviewed-by: Jisheng Zhang <jszhang@kernel.org>
Fixes: 44c92257 ("RISC-V: enable XIP")
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

The kyber ioscheduler calls trace_block_rq_insert() *after* the request
is added to the queue but the documentation for trace_block_rq_insert()
says that the call should be made *before* the request is added to the
queue.  Move the tracepoint for the kyber ioscheduler so that it is
consistent with the documentation.
Signed-off-by: Vincent Fu <vincent.fu@samsung.com>
Link: https://lore.kernel.org/r/20210804194913.10497-1-vincent.fu@samsung.com
Reviewed by: Adam Manzanares <a.manzanares@samsung.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

Pull ext4 fixes from Ted Ts'o:
 "A regression fix, bug fix, and a comment cleanup for ext4"

* tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  ext4: fix potential htree corruption when growing large_dir directories
  ext4: remove conflicting comment from __ext4_forget
  ext4: fix potential uninitialized access to retval in kmmpd

Pull tracing fixes from Steven Rostedt:
 "Fix tracepoint race between static_call and callback data

  As callbacks to a tracepoint are paired with the data that is passed
  in when the callback is registered to the tracepoint, it must have
  that data passed to the callback when the tracepoint is triggered,
  else bad things will happen. To keep the two together, they are both
  assigned to a tracepoint structure and added to an array. The
  tracepoint call site will dereference the structure (via RCU) and call
  the callback in that structure along with the data in that structure.
  This keeps the callback and data tightly coupled.

  Because of the overhead that retpolines have on tracepoint callbacks,
  if there's only one callback attached to a tracepoint (a common case),
  then it is called via a static call (code modified to do a direct call
  instead of an indirect call). But to implement this, the data had to
  be decoupled from the callback, as now the callback is implemented via
  a direct call from the static call and not an indirect call from the
  dereferenced structure.

  Note, the static call only calls a callback used when there's a single
  callback attached to the tracepoint. If more than one callback is
  attached to the same tracepoint, then the static call will call an
  iterator function that goes back to dereferencing the structure
  keeping the callback and its data tightly coupled again.

  Issues can arise when going from 0 callbacks to one, as the static
  call is assigned to the callback, and it must take care that the data
  passed to it is loaded before the static call calls the callback.
  Going from 1 to 2 callbacks is not an issue, as long as the static
  call is updated to the iterator before the tracepoint structure array
  is updated via RCU. Going from 2 to more or back down to 2 is not an
  issue as the iterator can handle all theses cases. But going from 2 to
  1, care must be taken as the static call is now calling a callback and
  the data that is loaded must be the data for that callback.

  Care was taken to ensure the callback and data would be in-sync, but
  after a bug was reported, it became clear that not enough was done to
  make sure that was the case. These changes address this.

  The first change is to compare the old and new data instead of the old
  and new callback, as it's the data that can corrupt the callback, even
  if the callback is the same (something getting freed).

  The next change is to convert these transitions into states, to make
  it easier to know when a synchronization is needed, and to perform
  those synchronizations. The problem with this patch is that it slows
  down disabling all events from under a second, to making it take over
  10 seconds to do the same work. But that is addressed in the final
  patch.

  The final patch uses the RCU state functions to keep track of the RCU
  state between the transitions, and only needs to perform the
  synchronization if an RCU synchronization hasn't been done already.
  This brings the performance of disabling all events back to its
  original value. That's because no synchronization is required between
  disabling tracepoints but is required when enabling a tracepoint after
  its been disabled. If an RCU synchronization happens after the
  tracepoint is disabled, and before it is re-enabled, there's no need
  to do the synchronization again.

  Both the second and third patch have subtle complexities that they are
  separated into two patches. But because the second patch causes such a
  regression in performance, the third patch adds a "Fixes" tag to the
  second patch, such that the two must be backported together and not
  just the second patch"

* tag 'trace-v5.14-rc4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracepoint: Use rcu get state and cond sync for static call updates
  tracepoint: Fix static call function vs data state mismatch
  tracepoint: static call: Compare data on transition from 2->1 callees

Pull power management fixes from Rafael Wysocki:
 "Fix a recent regression in the timer events oriented (TEO) cpuidle
  governor causing it to misbehave when idle state 0 is disabled and
  rename two local variables for improved clarity on top of that"

* tag 'pm-5.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  cpuidle: teo: Rename two local variables in teo_select()
  cpuidle: teo: Fix alternative idle state lookup

Pull ACPI fix from Rafael Wysocki:
 "Revert a recent ACPICA commit causing boot issues to appear on some
  systems"

* tag 'acpi-5.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  Revert "ACPICA: Fix memory leak caused by _CID repair function"

Pull ARM SoC fixes from Arnd Bergmann:
 "Lots of small fixes for Arm SoCs this time, nothing too worrying:

   - omap/beaglebone boot regression fix in gpt12 timer

   - revert for i.mx8 soc driver breaking as a platform_driver

   - kexec/kdump fixes for op-tee

   - various fixes for incorrect DT settings on imx, mvebu, omap, stm32,
     and tegra causing problems.

   - device tree fixes for static checks in nomadik, versatile, stm32

   - code fixes for issues found in build testing and with static
     checking on tegra, ixp4xx, imx, omap"

* tag 'soc-fixes-5.14-2' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (36 commits)
  soc: ixp4xx/qmgr: fix invalid __iomem access
  soc: ixp4xx: fix printing resources
  ARM: ixp4xx: goramo_mlr depends on old PCI driver
  ARM: ixp4xx: fix compile-testing soc drivers
  soc/tegra: Make regulator couplers depend on CONFIG_REGULATOR
  ARM: dts: nomadik: Fix up interrupt controller node names
  ARM: dts: stm32: Fix touchscreen IRQ line assignment on DHCOM
  ARM: dts: stm32: Disable LAN8710 EDPD on DHCOM
  ARM: dts: stm32: Prefer HW RTC on DHCOM SoM
  omap5-board-common: remove not physically existing vdds_1v8_main fixed-regulator
  ARM: dts: am437x-l4: fix typo in can@0 node
  ARM: dts: am43x-epos-evm: Reduce i2c0 bus speed for tps65218
  bus: ti-sysc: AM3: RNG is GP only
  ARM: omap2+: hwmod: fix potential NULL pointer access
  arm64: dts: armada-3720-turris-mox: remove mrvl,i2c-fast-mode
  arm64: dts: armada-3720-turris-mox: fixed indices for the SDHC controllers
  ARM: dts: imx: Swap M53Menlo pinctrl_power_button/pinctrl_power_out pins
  ARM: imx: fix missing 3rd argument in macro imx_mmdc_perf_init
  ARM: dts: colibri-imx6ull: limit SDIO clock to 25MHz
  arm64: dts: ls1028: sl28: fix networking for variant 2
  ...

Pull arm64 fixes from Will Deacon:
 "It's all pretty minor but the main fix is sorting out how we deal with
  return values from 32-bit system calls as audit expects error codes to
  be sign-extended to 64 bits

  Summary:

   - Fix extension/truncation of return values from 32-bit system calls

   - Fix interaction between unwinding and tracing

   - Fix spurious toolchain warning emitted during make

   - Fix Kconfig help text for RANDOMIZE_MODULE_REGION_FULL"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: stacktrace: avoid tracing arch_stack_walk()
  arm64: stacktrace: fix comment
  arm64: fix the doc of RANDOMIZE_MODULE_REGION_FULL
  arm64: move warning about toolchains to archprepare
  arm64: fix compat syscall return truncation

Pull MIPS fix from Thomas Bogendoerfer:
 "Fix PMD accounting change"

* tag 'mips-fixes_5.14_1' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux:
  MIPS: check return value of pgtable_pmd_page_ctor

Pull spi fixes from Mark Brown:
 "A small collection of fixes for SPI, small mostly driver specific
  things plus a fix for module autoloading which hadn't been working
  properly for DT systems"

* tag 'spi-fix-v5.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
  spi: cadence-quadspi: Fix check condition for DTR ops
  spi: mediatek: Fix fifo transfer
  spi: imx: mx51-ecspi: Fix CONFIGREG delay comment
  spi: imx: mx51-ecspi: Fix low-speed CONFIGREG delay calculation
  spi: update modalias_show after of_device_uevent_modalias support
  spi: meson-spicc: fix memory leak in meson_spicc_remove
  spi: spi-mux: Add module info needed for autoloading

Pull dmaengine fixes from Vinod Koul:
 "A bunch of driver fixes, notably:

   - idxd driver fixes for submission race, driver remove sequence,
     setup sequence for MSIXPERM, array index and updating descriptor
     vector

   - usb-dmac, pm reference leak fix

   - xilinx_dma, read-after-free fix

   - uniphier-xdmac fix for using atomic readl_poll_timeout_atomic()

   - of-dma, router_xlate to return

   - imx-dma, generic dma fix"

* tag 'dmaengine-fix-5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine:
  dmaengine: imx-dma: configure the generic DMA type to make it work
  dmaengine: of-dma: router_xlate to return -EPROBE_DEFER if controller is not yet available
  dmaengine: stm32-dmamux: Fix PM usage counter unbalance in stm32 dmamux ops
  dmaengine: stm32-dma: Fix PM usage counter imbalance in stm32 dma ops
  dmaengine: uniphier-xdmac: Use readl_poll_timeout_atomic() in atomic state
  dmaengine: idxd: fix submission race window
  dmaengine: idxd: fix sequence for pci driver remove() and shutdown()
  dmaengine: idxd: fix desc->vector that isn't being updated
  dmaengine: idxd: fix setup sequence for MSIXPERM table
  dmaengine: idxd: fix array index when int_handles are being used
  dmaengine: usb-dmac: Fix PM reference leak in usb_dmac_probe()
  dmaengine: xilinx_dma: Fix read-after-free bug when terminating transfers

Pull rdma fixes from Jason Gunthorpe:
 "Several small recent regressions - rather more than usual, but nothing
  too scary. Good to know people are testing.

   - Typo causing incorrect operation of the mlx5 mkey cache
     expiration

   - Revert a CM patch that is breaking some ULPs

   - Typo breaking SRQ in rxe

   - Revert a rxe patch breaking icrc calculation

   - Static checker warning about unbalanced locking in hns

   - Subtle cxgb4 regression from a recent atomic to refcount
     conversion"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma:
  RDMA/iw_cxgb4: Fix refcount underflow while destroying cqs.
  RDMA/hns: Fix the double unlock problem of poll_sem
  RDMA/rxe: Restore setting tot_len in the IPv4 header
  RDMA/rxe: Use the correct size of wqe when processing SRQ
  RDMA/cma: Revert INIT-INIT patch
  RDMA/mlx5: Delay emptying a cache entry when a new MR is added to it recently

Pull sound fixes from Takashi Iwai:
 "A collection of small fixes:

   - A few regression fixes (PCM core fixes, USB-audio fixes)

   - Follow up fixes for the USB-audio mixer changes in this cycle

   - A long-standing ALSA sequencer race bug fix

   - Usual device-specific quirks for HD- and USB-audio"

* tag 'sound-5.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: seq: Fix racy deletion of subscriber
  ALSA: memalloc: Fix regression with SNDRV_DMA_TYPE_CONTINUOUS
  ALSA: pcm - fix mmap capability check for the snd-dummy driver
  ALSA: usb-audio: Avoid unnecessary or invalid connector selection at resume
  ALSA: hda/realtek: add mic quirk for Acer SF314-42
  ALSA: usb-audio: Add registration quirk for JBL Quantum 600
  ALSA: hda/realtek: Fix headset mic for Acer SWIFT SF314-56 (ALC256)
  ALSA: usb-audio: Fix superfluous autosuspend recovery
  ALSA: usb-audio: fix incorrect clock source setting
  ALSA: scarlett2: Fix line out/speaker switching notifications
  ALSA: scarlett2: Correct channel mute status after mute button pressed
  ALSA: scarlett2: Fix Direct Monitor control name for 2i2
  ALSA: scarlett2: Fix Mute/Dim/MSD Mode control names