Commit cac173bea5 ("ACPI: processor: idle: Rework the handling of
acpi_processor_ffh_lpi_probe()") moved the acpi_processor_ffh_lpi_probe()
call from acpi_processor_setup_cpuidle_dev(), where its return value was
ignored, to acpi_processor_get_power_info(), where it is now treated as
a hard failure. As a result, platforms where psci_acpi_cpu_init_idle()
returned -ENODEV stopped registering any cpuidle states, forcing CPUs to
busy-poll when idle.
On NVIDIA Grace (aarch64) systems with PSCIv1.1, pr->power.count is 1
(only WFI, no deep PSCI states beyond it), so the previous
"count = pr->power.count - 1; if (count <= 0) return -ENODEV;" check
returned -ENODEV for all 72 CPUs and disabled cpuidle entirely.
The lpi_states count is already validated in acpi_processor_get_lpi_info(),
so the check here is redundant. Simplify the loop to iterate over
lpi_states[1..power.count). When only WFI is present, the loop body
simply does not execute and the function returns 0, which is the correct
outcome: there is nothing to validate for FFH and no error to report.
Suggested-by: Huisong Li <lihuisong@huawei.com>
Cc: stable@vger.kernel.org
Fixes: cac173bea5 ("ACPI: processor: idle: Rework the handling of acpi_processor_ffh_lpi_probe()")
Signed-off-by: Breno Leitao <leitao@debian.org>
Reviewed-by: Sudeep Holla <sudeep.holla@kernel.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Add the missing trailing newline to the dev_err() message
printed when SDEI event registration fails.
This keeps the error output as a properly terminated log line.
Fixes: a2a591fb76 ("ACPI: AGDI: Add driver for Arm Generic Diagnostic Dump and Reset device")
Reviewed-by: Ilkka Koskinen <ilkka@os.amperecomputing.com>
Signed-off-by: Haoyu Lu <hechushiguitu666@gmail.com>
Reviewed-by: Hanjun Guo <guohanjun@huawei.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This was done entirely with mindless brute force, using
git grep -l '\<k[vmz]*alloc_objs*(.*, GFP_KERNEL)' |
xargs sed -i 's/\(alloc_objs*(.*\), GFP_KERNEL)/\1)/'
to convert the new alloc_obj() users that had a simple GFP_KERNEL
argument to just drop that argument.
Note that due to the extreme simplicity of the scripting, any slightly
more complex cases spread over multiple lines would not be triggered:
they definitely exist, but this covers the vast bulk of the cases, and
the resulting diff is also then easier to check automatically.
For the same reason the 'flex' versions will be done as a separate
conversion.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This is the result of running the Coccinelle script from
scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to
avoid scalar types (which need careful case-by-case checking), and
instead replace kmalloc-family calls that allocate struct or union
object instances:
Single allocations: kmalloc(sizeof(TYPE), ...)
are replaced with: kmalloc_obj(TYPE, ...)
Array allocations: kmalloc_array(COUNT, sizeof(TYPE), ...)
are replaced with: kmalloc_objs(TYPE, COUNT, ...)
Flex array allocations: kmalloc(struct_size(PTR, FAM, COUNT), ...)
are replaced with: kmalloc_flex(*PTR, FAM, COUNT, ...)
(where TYPE may also be *VAR)
The resulting allocations no longer return "void *", instead returning
"TYPE *".
Signed-off-by: Kees Cook <kees@kernel.org>
Pull arm64 updates from Will Deacon:
"There's a little less than normal, probably due to LPC & Christmas/New
Year meaning that a few series weren't quite ready or reviewed in
time. It's still useful across the board, despite the only real
feature being support for the LS64 feature enabling 64-byte atomic
accesses to endpoints that support it.
ACPI:
- Add interrupt signalling support to the AGDI handler
- Add Catalin and myself to the arm64 ACPI MAINTAINERS entry
CPU features:
- Drop Kconfig options for PAN and LSE (these are detected at runtime)
- Add support for 64-byte single-copy atomic instructions (LS64/LS64V)
- Reduce MTE overhead when executing in the kernel on Ampere CPUs
- Ensure POR_EL0 value exposed via ptrace is up-to-date
- Fix error handling on GCS allocation failure
CPU frequency:
- Add CPU hotplug support to the FIE setup in the AMU driver
Entry code:
- Minor optimisations and cleanups to the syscall entry path
- Preparatory rework for moving to the generic syscall entry code
Hardware errata:
- Work around Spectre-BHB on TSV110 processors
- Work around broken CMO propagation on some systems with the SI-L1
interconnect
Miscellaneous:
- Disable branch profiling for arch/arm64/ to avoid issues with
noinstr
- Minor fixes and cleanups (kexec + ubsan, WARN_ONCE() instead of
WARN_ON(), reduction of boolean expression)
- Fix custom __READ_ONCE() implementation for LTO builds when
operating on non-atomic types
Perf and PMUs:
- Support for CMN-600AE
- Be stricter about supported hardware in the CMN driver
- Support for DSU-110 and DSU-120
- Support for the cycles event in the DSU driver (alongside the
dedicated cycles counter)
- Use IRQF_NO_THREAD instead of IRQF_ONESHOT in the cxlpmu driver
- Use !bitmap_empty() as a faster alternative to bitmap_weight()
- Fix SPE error handling when failing to resume profiling
Selftests:
- Add support for the FORCE_TARGETS option to the arm64 kselftests
- Avoid nolibc-specific my_syscall() function
- Add basic test for the LS64 HWCAP
- Extend fp-pidbench to cover additional workload patterns"
* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (43 commits)
perf/arm-cmn: Reject unsupported hardware configurations
perf: arm_spe: Properly set hw.state on failures
arm64/gcs: Fix error handling in arch_set_shadow_stack_status()
arm64: Fix non-atomic __READ_ONCE() with CONFIG_LTO=y
arm64: poe: fix stale POR_EL0 values for ptrace
kselftest/arm64: Raise default number of loops in fp-pidbench
kselftest/arm64: Add a no-SVE loop after SVE in fp-pidbench
perf/cxlpmu: Replace IRQF_ONESHOT with IRQF_NO_THREAD
arm64: mte: Set TCMA1 whenever MTE is present in the kernel
arm64/ptrace: Return early for ptrace_report_syscall_entry() error
arm64/ptrace: Split report_syscall()
arm64: Remove unused _TIF_WORK_MASK
kselftest/arm64: Add missing file in .gitignore
arm64: errata: Workaround for SI L1 downstream coherency issue
kselftest/arm64: Add HWCAP test for FEAT_LS64
arm64: Add support for FEAT_{LS64, LS64_V}
KVM: arm64: Enable FEAT_{LS64, LS64_V} in the supported guest
arm64: Provide basic EL2 setup for FEAT_{LS64, LS64_V} usage at EL0/1
KVM: arm64: Handle DABT caused by LS64* instructions on unsupported memory
KVM: arm64: Add documentation for KVM_EXIT_ARM_LDST64B
...
To probe an IWB in an ACPI based system it is required:
- to implement the IORT functions handling the IWB IORT node and create
functions to retrieve IWB firmware information
- to augment the driver to match the DSDT ACPI "ARMH0003" device and
retrieve the IWB wire and trigger mask from the GSI interrupt descriptor
in the IWB msi_domain_ops.msi_translate() function
Make the required driver changes to enable IWB probing in ACPI systems.
The GICv5 GSI format requires special handling for IWB routed IRQs.
Add IWB GSI detection to the top level driver gic_v5_get_gsi_domain_id()
function so that the correct IRQ domain for a GSI can be detected by
parsing the GSI and check whether it is an IWB-backed IRQ or not.
Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Acked-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/20260115-gicv5-host-acpi-v3-6-c13a9a150388@kernel.org
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
On ACPI ARM64 systems the GICv5 ITS configuration and translate frames
are described in the MADT table.
Refactor the current GICv5 ITS driver code to share common functions
between ACPI and OF and implement ACPI probing in the GICv5 ITS driver.
Add iort_msi_xlate() to map a device ID and retrieve an MSI controller
fwnode node for ACPI systems and update pci_msi_map_rid_ctlr_node() to
use it in its ACPI code path.
Add the required functions to IORT code for deviceID retrieval and IRQ
domain registration and look-up so that the GICv5 ITS driver in an
ACPI based system can be successfully probed.
Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Acked-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/20260115-gicv5-host-acpi-v3-5-c13a9a150388@kernel.org
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
AGDI has two types of signaling modes: SDEI and interrupt.
Currently, the AGDI driver only supports SDEI.
Therefore, add support for interrupt signaling mode.
The interrupt vector is retrieved from the AGDI table, and call panic
function when an interrupt occurs.
Acked-by: Hanjun Guo <guohanjun@huawei.com>
Reviewed-by: Ilkka Koskinen <ilkka@os.amperecomputing.com>
Signed-off-by: Kazuhiro Abe <fj1078ii@aa.jp.fujitsu.com>
Signed-off-by: Will Deacon <will@kernel.org>
Pull arm64 updates from Catalin Marinas:
"These are the arm64 updates for 6.19.
The biggest part is the Arm MPAM driver under drivers/resctrl/.
There's a patch touching mm/ to handle spurious faults for huge pmd
(similar to the pte version). The corresponding arm64 part allows us
to avoid the TLB maintenance if a (huge) page is reused after a write
fault. There's EFI refactoring to allow runtime services with
preemption enabled and the rest is the usual perf/PMU updates and
several cleanups/typos.
Summary:
Core features:
- Basic Arm MPAM (Memory system resource Partitioning And Monitoring)
driver under drivers/resctrl/ which makes use of the fs/rectrl/ API
Perf and PMU:
- Avoid cycle counter on multi-threaded CPUs
- Extend CSPMU device probing and add additional filtering support
for NVIDIA implementations
- Add support for the PMUs on the NoC S3 interconnect
- Add additional compatible strings for new Cortex and C1 CPUs
- Add support for data source filtering to the SPE driver
- Add support for i.MX8QM and "DB" PMU in the imx PMU driver
Memory managemennt:
- Avoid broadcast TLBI if page reused in write fault
- Elide TLB invalidation if the old PTE was not valid
- Drop redundant cpu_set_*_tcr_t0sz() macros
- Propagate pgtable_alloc() errors outside of __create_pgd_mapping()
- Propagate return value from __change_memory_common()
ACPI and EFI:
- Call EFI runtime services without disabling preemption
- Remove unused ACPI function
Miscellaneous:
- ptrace support to disable streaming on SME-only systems
- Improve sysreg generation to include a 'Prefix' descriptor
- Replace __ASSEMBLY__ with __ASSEMBLER__
- Align register dumps in the kselftest zt-test
- Remove some no longer used macros/functions
- Various spelling corrections"
* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (94 commits)
arm64/mm: Document why linear map split failure upon vm_reset_perms is not problematic
arm64/pageattr: Propagate return value from __change_memory_common
arm64/sysreg: Remove unused define ARM64_FEATURE_FIELD_BITS
KVM: arm64: selftests: Consider all 7 possible levels of cache
KVM: arm64: selftests: Remove ARM64_FEATURE_FIELD_BITS and its last user
arm64: atomics: lse: Remove unused parameters from ATOMIC_FETCH_OP_AND macros
Documentation/arm64: Fix the typo of register names
ACPI: GTDT: Get rid of acpi_arch_timer_mem_init()
perf: arm_spe: Add support for filtering on data source
perf: Add perf_event_attr::config4
perf/imx_ddr: Add support for PMU in DB (system interconnects)
perf/imx_ddr: Get and enable optional clks
perf/imx_ddr: Move ida_alloc() from ddr_perf_init() to ddr_perf_probe()
dt-bindings: perf: fsl-imx-ddr: Add compatible string for i.MX8QM, i.MX8QXP and i.MX8DXL
arm64: remove duplicate ARCH_HAS_MEM_ENCRYPT
arm64: mm: use untagged address to calculate page index
MAINTAINERS: new entry for MPAM Driver
arm_mpam: Add kunit tests for props_mismatch()
arm_mpam: Add kunit test for bitmap reset
arm_mpam: Add helper to reset saved mbwu state
...
* arm64/for-next/perf:
perf: arm_spe: Add support for filtering on data source
perf: Add perf_event_attr::config4
perf/imx_ddr: Add support for PMU in DB (system interconnects)
perf/imx_ddr: Get and enable optional clks
perf/imx_ddr: Move ida_alloc() from ddr_perf_init() to ddr_perf_probe()
dt-bindings: perf: fsl-imx-ddr: Add compatible string for i.MX8QM, i.MX8QXP and i.MX8DXL
arch_topology: Provide a stub topology_core_has_smt() for !CONFIG_GENERIC_ARCH_TOPOLOGY
perf/arm-ni: Fix and optimise register offset calculation
perf: arm_pmuv3: Add new Cortex and C1 CPU PMUs
perf: arm_cspmu: fix error handling in arm_cspmu_impl_unregister()
perf/arm-ni: Add NoC S3 support
perf/arm_cspmu: nvidia: Add pmevfiltr2 support
perf/arm_cspmu: nvidia: Add revision id matching
perf/arm_cspmu: Add pmpidr support
perf/arm_cspmu: Add callback to reset filter config
perf: arm_pmuv3: Don't use PMCCNTR_EL0 on SMT cores
* for-next/misc:
: Miscellaneous patches
arm64: atomics: lse: Remove unused parameters from ATOMIC_FETCH_OP_AND macros
arm64: remove duplicate ARCH_HAS_MEM_ENCRYPT
arm64: mm: use untagged address to calculate page index
arm64: mm: make linear mapping permission update more robust for patial range
arm64/mm: Elide TLB flush in certain pte protection transitions
arm64/mm: Rename try_pgd_pgtable_alloc_init_mm
arm64/mm: Allow __create_pgd_mapping() to propagate pgtable_alloc() errors
arm64: add unlikely hint to MTE async fault check in el0_svc_common
arm64: acpi: add newline to deferred APEI warning
arm64: entry: Clean out some indirection
arm64/mm: Ensure PGD_SIZE is aligned to 64 bytes when PA_BITS = 52
arm64/mm: Drop cpu_set_[default|idmap]_tcr_t0sz()
arm64: remove unused ARCH_PFN_OFFSET
arm64: use SOFTIRQ_ON_OWN_STACK for enabling softirq stack
arm64: Remove assertion on CONFIG_VMAP_STACK
* for-next/kselftest:
: arm64 kselftest patches
kselftest/arm64: Align zt-test register dumps
* for-next/efi-preempt:
: arm64: Make EFI calls preemptible
arm64/efi: Call EFI runtime services without disabling preemption
arm64/efi: Move uaccess en/disable out of efi_set_pgd()
arm64/efi: Drop efi_rt_lock spinlock from EFI arch wrapper
arm64/fpsimd: Permit kernel mode NEON with IRQs off
arm64/fpsimd: Don't warn when EFI execution context is preemptible
efi/runtime-wrappers: Keep track of the efi_runtime_lock owner
efi: Add missing static initializer for efi_mm::cpus_allowed_lock
* for-next/assembler-macro:
: arm64: Replace __ASSEMBLY__ with __ASSEMBLER__ in headers
arm64: Replace __ASSEMBLY__ with __ASSEMBLER__ in non-uapi headers
arm64: Replace __ASSEMBLY__ with __ASSEMBLER__ in uapi headers
* for-next/typos:
: Random typo/spelling fixes
arm64: Fix double word in comments
arm64: Fix typos and spelling errors in comments
* for-next/sme-ptrace-disable:
: Support disabling streaming mode via ptrace on SME only systems
kselftest/arm64: Cover disabling streaming mode without SVE in fp-ptrace
kselftst/arm64: Test NT_ARM_SVE FPSIMD format writes on non-SVE systems
arm64/sme: Support disabling streaming mode via ptrace on SME only systems
* for-next/local-tlbi-page-reused:
: arm64, mm: avoid TLBI broadcast if page reused in write fault
arm64, tlbflush: don't TLBI broadcast if page reused in write fault
mm: add spurious fault fixing support for huge pmd
* for-next/mpam: (34 commits)
: Basic Arm MPAM driver (more to follow)
MAINTAINERS: new entry for MPAM Driver
arm_mpam: Add kunit tests for props_mismatch()
arm_mpam: Add kunit test for bitmap reset
arm_mpam: Add helper to reset saved mbwu state
arm_mpam: Use long MBWU counters if supported
arm_mpam: Probe for long/lwd mbwu counters
arm_mpam: Consider overflow in bandwidth counter state
arm_mpam: Track bandwidth counter state for power management
arm_mpam: Add mpam_msmon_read() to read monitor value
arm_mpam: Add helpers to allocate monitors
arm_mpam: Probe and reset the rest of the features
arm_mpam: Allow configuration to be applied and restored during cpu online
arm_mpam: Use a static key to indicate when mpam is enabled
arm_mpam: Register and enable IRQs
arm_mpam: Extend reset logic to allow devices to be reset any time
arm_mpam: Add a helper to touch an MSC from any CPU
arm_mpam: Reset MSC controls from cpuhp callbacks
arm_mpam: Merge supported features during mpam_enable() into mpam_class
arm_mpam: Probe the hardware features resctrl supports
arm_mpam: Add helpers for managing the locking around the mon_sel registers
...
* for-next/acpi:
: arm64 acpi updates
ACPI: GTDT: Get rid of acpi_arch_timer_mem_init()
* for-next/documentation:
: arm64 Documentation updates
Documentation/arm64: Fix the typo of register names
Pull clocksource updates from Thomas Gleixner:
- Further preparations for modular clocksource/event drivers
- The usual device tree updates to support new chip variants and the
related changes to thise drivers
- Avoid a 64-bit division in the TEGRA186 driver, which caused a build
fail on 32-bit machines.
- Small fixes, improvements and cleanups all over the place
* tag 'timers-clocksource-2025-09-29' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (52 commits)
dt-bindings: timer: exynos4210-mct: Add compatible for ARTPEC-9 SoC
clocksource/drivers/sh_cmt: Split start/stop of clock source and events
clocksource/drivers/clps711x: Fix resource leaks in error paths
clocksource/drivers/arm_global_timer: Add auto-detection for initial prescaler values
clocksource/drivers/ingenic-sysost: Convert from round_rate() to determine_rate()
clocksource/drivers/timer-tegra186: Don't print superfluous errors
clocksource/drivers/timer-rtl-otto: Simplify documentation
clocksource/drivers/timer-rtl-otto: Do not interfere with interrupts
clocksource/drivers/timer-rtl-otto: Drop set_counter function
clocksource/drivers/timer-rtl-otto: Work around dying timers
clocksource/drivers/timer-ti-dm : Capture functionality for OMAP DM timer
clocksource/drivers/arm_arch_timer_mmio: Add MMIO clocksource
clocksource/drivers/arm_arch_timer_mmio: Switch over to standalone driver
clocksource/drivers/arm_arch_timer: Add standalone MMIO driver
ACPI: GTDT: Generate platform devices for MMIO timers
clocksource/drivers/nxp-pit: Add NXP Automotive s32g2 / s32g3 support
dt: bindings: fsl,vf610-pit: Add compatible for s32g2 and s32g3
clocksource/drivers/vf-pit: Rename the VF PIT to NXP PIT
clocksource/drivers/vf-pit: Unify the function name for irq ack
clocksource/drivers/vf-pit: Consolidate calls to pit_*_disable/enable
...
In hindsight, there were some crucial subtleties overlooked when moving
{of,acpi}_dma_configure() to driver probe time to allow waiting for
IOMMU drivers with -EPROBE_DEFER, and these have become an
ever-increasing source of problems. The IOMMU API has some fundamental
assumptions that iommu_probe_device() is called for every device added
to the system, in the order in which they are added. Calling it in a
random order or not at all dependent on driver binding leads to
malformed groups, a potential lack of isolation for devices with no
driver, and all manner of unexpected concurrency and race conditions.
We've attempted to mitigate the latter with point-fix bodges like
iommu_probe_device_lock, but it's a losing battle and the time has come
to bite the bullet and address the true source of the problem instead.
The crux of the matter is that the firmware parsing actually serves two
distinct purposes; one is identifying the IOMMU instance associated with
a device so we can check its availability, the second is actually
telling that instance about the relevant firmware-provided data for the
device. However the latter also depends on the former, and at the time
there was no good place to defer and retry that separately from the
availability check we also wanted for client driver probe.
Nowadays, though, we have a proper notion of multiple IOMMU instances in
the core API itself, and each one gets a chance to probe its own devices
upon registration, so we can finally make that work as intended for
DT/IORT/VIOT platforms too. All we need is for iommu_probe_device() to
be able to run the iommu_fwspec machinery currently buried deep in the
wrong end of {of,acpi}_dma_configure(). Luckily it turns out to be
surprisingly straightforward to bootstrap this transformation by pretty
much just calling the same path twice. At client driver probe time,
dev->driver is obviously set; conversely at device_add(), or a
subsequent bus_iommu_probe(), any device waiting for an IOMMU really
should *not* have a driver already, so we can use that as a condition to
disambiguate the two cases, and avoid recursing back into the IOMMU core
at the wrong times.
Obviously this isn't the nicest thing, but for now it gives us a
functional baseline to then unpick the layers in between without many
more awkward cross-subsystem patches. There are some minor side-effects
like dma_range_map potentially being created earlier, and some debug
prints being repeated, but these aren't significantly detrimental. Let's
make things work first, then deal with making them nice.
With the basic flow finally in the right order again, the next step is
probably turning the bus->dma_configure paths inside-out, since all we
really need from bus code is its notion of which device and input ID(s)
to parse the common firmware properties with...
Acked-by: Bjorn Helgaas <bhelgaas@google.com> # pci-driver.c
Acked-by: Rob Herring (Arm) <robh@kernel.org> # of/device.c
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Reviewed-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/e3b191e6fd6ca9a1e84c5e5e40044faf97abb874.1740753261.git.robin.murphy@arm.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Pull more ACPI updates from Rafael Wysocki:
"These add a common init function for arch-specific ACPI
initialization, clean up idle states initialization in the ACPI
processor_idle driver and update quirks:
- Introduce acpi_arch_init() for architecture-specific ACPI subsystem
initialization (Miao Wang)
- Clean up Asus quirks in acpi_quirk_skip_dmi_ids[] and add a quirk
to skip I2C clients on Acer Iconia One 8 A1-840 (Hans de Goede)
- Make the ACPI processor_idle driver use acpi_idle_play_dead() for
all idle states regardless of their types (Rafael Wysocki)"
* tag 'acpi-6.13-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI: introduce acpi_arch_init()
ACPI: x86: Clean up Asus entries in acpi_quirk_skip_dmi_ids[]
ACPI: x86: Add skip i2c clients quirk for Acer Iconia One 8 A1-840
ACPI: processor_idle: Use acpi_idle_play_dead() for all C-states
Pull iommufd updates from Jason Gunthorpe:
"Several new features and uAPI for iommufd:
- IOMMU_IOAS_MAP_FILE allows passing in a file descriptor as the
backing memory for an iommu mapping. To date VFIO/iommufd have used
VMA's and pin_user_pages(), this now allows using memfds and
memfd_pin_folios(). Notably this creates a pure folio path from the
memfd to the iommu page table where memory is never broken down to
PAGE_SIZE.
- IOMMU_IOAS_CHANGE_PROCESS moves the pinned page accounting between
two processes. Combined with the above this allows iommufd to
support a VMM re-start using exec() where something like qemu would
exec() a new version of itself and fd pass the memfds/iommufd/etc
to the new process. The memfd allows DMA access to the memory to
continue while the new process is getting setup, and the
CHANGE_PROCESS updates all the accounting.
- Support for fault reporting to userspace on non-PRI HW, such as ARM
stall-mode embedded devices.
- IOMMU_VIOMMU_ALLOC introduces the concept of a HW/driver backed
virtual iommu. This will be used by VMMs to access hardware
features that are contained with in a VM. The first use is to
inform the kernel of the virtual SID to physical SID mapping when
issuing SID based invalidation on ARM. Further uses will tie HW
features that are directly accessed by the VM, such as invalidation
queue assignment and others.
- IOMMU_VDEVICE_ALLOC informs the kernel about the mapping of virtual
device to physical device within a VIOMMU. Minimially this is used
to translate VM issued cache invalidation commands from virtual to
physical device IDs.
- Enhancements to IOMMU_HWPT_INVALIDATE and IOMMU_HWPT_ALLOC to work
with the VIOMMU
- ARM SMMuv3 support for nested translation. Using the VIOMMU and
VDEVICE the driver can model this HW's behavior for nested
translation. This includes a shared branch from Will"
* tag 'for-linus-iommufd' of git://git.kernel.org/pub/scm/linux/kernel/git/jgg/iommufd: (51 commits)
iommu/arm-smmu-v3: Import IOMMUFD module namespace
iommufd: IOMMU_IOAS_CHANGE_PROCESS selftest
iommufd: Add IOMMU_IOAS_CHANGE_PROCESS
iommufd: Lock all IOAS objects
iommufd: Export do_update_pinned
iommu/arm-smmu-v3: Support IOMMU_HWPT_INVALIDATE using a VIOMMU object
iommu/arm-smmu-v3: Allow ATS for IOMMU_DOMAIN_NESTED
iommu/arm-smmu-v3: Use S2FWB for NESTED domains
iommu/arm-smmu-v3: Support IOMMU_DOMAIN_NESTED
iommu/arm-smmu-v3: Support IOMMU_VIOMMU_ALLOC
Documentation: userspace-api: iommufd: Update vDEVICE
iommufd/selftest: Add vIOMMU coverage for IOMMU_HWPT_INVALIDATE ioctl
iommufd/selftest: Add IOMMU_TEST_OP_DEV_CHECK_CACHE test command
iommufd/selftest: Add mock_viommu_cache_invalidate
iommufd/viommu: Add iommufd_viommu_find_dev helper
iommu: Add iommu_copy_struct_from_full_user_array helper
iommufd: Allow hwpt_id to carry viommu_id for IOMMU_HWPT_INVALIDATE
iommu/viommu: Add cache_invalidate to iommufd_viommu_ops
iommufd/selftest: Add IOMMU_VDEVICE_ALLOC test coverage
iommufd/viommu: Add IOMMUFD_OBJ_VDEVICE and IOMMU_VDEVICE_ALLOC ioctl
...
Pull ACPI updates from Rafael Wysocki:
"These include a couple of fixes, a new ACPI backlight quirk for Apple
MacbookPro11,2 and Air7,2 and a bunch of cleanups:
- Fix _CPC register setting issue for registers located in memory in
the ACPI CPPC library code (Lifeng Zheng)
- Use DEFINE_SIMPLE_DEV_PM_OPS in the ACPI battery driver, make it
use devm_ for initializing mutexes and allocating driver data, and
make it check the register_pm_notifier() return value (Thomas
Weißschuh, Andy Shevchenko)
- Make the ACPI EC driver support compile-time conditional and allow
ACPI to be built without CONFIG_HAS_IOPORT (Arnd Bergmann)
- Remove a redundant error check from the pfr_telemetry driver (Colin
Ian King)
- Rearrange the processor_perflib code in the ACPI processor driver
to avoid compiling x86-specific code on other architectures (Arnd
Bergmann)
- Add adev NULL check to acpi_quirk_skip_serdev_enumeration() and
make UART skip quirks work on PCI UARTs without an UID (Hans de
Goede)
- Force native backlight handling Apple MacbookPro11,2 and Air7,2 in
the ACPI video driver (Jonathan Denose)
- Switch several ACPI platform drivers back to using struct
platform_driver::remove() (Uwe Kleine-König)
- Replace strcpy() with strscpy() in multiple places in the ACPI
subsystem (Muhammad Qasim Abdul Majeed, Abdul Rahim)"
* tag 'acpi-6.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (24 commits)
ACPI: video: force native for Apple MacbookPro11,2 and Air7,2
ACPI: CPPC: Fix _CPC register setting issue
ACPI: Switch back to struct platform_driver::remove()
ACPI: x86: Add adev NULL check to acpi_quirk_skip_serdev_enumeration()
ACPI: x86: Make UART skip quirks work on PCI UARTs without an UID
ACPI: allow building without CONFIG_HAS_IOPORT
ACPI: processor_perflib: extend X86 dependency
ACPI: scan: Use strscpy() instead of strcpy()
ACPI: SBSHC: Use strscpy() instead of strcpy()
ACPI: SBS: Use strscpy() instead of strcpy()
ACPI: power: Use strscpy() instead of strcpy()
ACPI: pci_root: Use strscpy() instead of strcpy()
ACPI: pci_link: Use strscpy() instead of strcpy()
ACPI: event: Use strscpy() instead of strcpy()
ACPI: EC: Use strscpy() instead of strcpy()
ACPI: APD: Use strscpy() instead of strcpy()
ACPI: thermal: Use strscpy() instead of strcpy()
ACPI: battery: Check for error code from devm_mutex_init() call
ACPI: EC: make EC support compile-time conditional
ACPI: pfr_telemetry: remove redundant error check on ret
...
After commit 0edb555a65 ("platform: Make platform_driver::remove()
return void") .remove() is (again) the right callback to implement for
platform drivers.
Convert all platform drivers below drivers/acpi to use .remove(), with
the eventual goal to drop struct platform_driver::remove_new(). As
.remove() and .remove_new() have the same prototypes, conversion is done
by just changing the structure member name in the driver initializer.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Link: https://patch.msgid.link/9ee1a9813f53698be62aab9d810b2d97a2a9f186.1731397722.git.u.kleine-koenig@baylibre.com
[ rjw: Subject edit ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
