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Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 updates from Will Deacon: "The highlights are support for Arm's "Permission Overlay Extension" using memory protection keys, support for running as a protected guest on Android as well as perf support for a bunch of new interconnect PMUs. Summary: ACPI: - Enable PMCG erratum workaround for HiSilicon HIP10 and 11 platforms. - Ensure arm64-specific IORT header is covered by MAINTAINERS. CPU Errata: - Enable workaround for hardware access/dirty issue on Ampere-1A cores. Memory management: - Define PHYSMEM_END to fix a crash in the amdgpu driver. - Avoid tripping over invalid kernel mappings on the kexec() path. - Userspace support for the Permission Overlay Extension (POE) using protection keys. Perf and PMUs: - Add support for the "fixed instruction counter" extension in the CPU PMU architecture. - Extend and fix the event encodings for Apple's M1 CPU PMU. - Allow LSM hooks to decide on SPE permissions for physical profiling. - Add support for the CMN S3 and NI-700 PMUs. Confidential Computing: - Add support for booting an arm64 kernel as a protected guest under Android's "Protected KVM" (pKVM) hypervisor. Selftests: - Fix vector length issues in the SVE/SME sigreturn tests - Fix build warning in the ptrace tests. Timers: - Add support for PR_{G,S}ET_TSC so that 'rr' can deal with non-determinism arising from the architected counter. Miscellaneous: - Rework our IPI-based CPU stopping code to try NMIs if regular IPIs don't succeed. - Minor fixes and cleanups" * tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (94 commits) perf: arm-ni: Fix an NULL vs IS_ERR() bug arm64: hibernate: Fix warning for cast from restricted gfp_t arm64: esr: Define ESR_ELx_EC_* constants as UL arm64: pkeys: remove redundant WARN perf: arm_pmuv3: Use BR_RETIRED for HW branch event if enabled MAINTAINERS: List Arm interconnect PMUs as supported perf: Add driver for Arm NI-700 interconnect PMU dt-bindings/perf: Add Arm NI-700 PMU perf/arm-cmn: Improve format attr printing perf/arm-cmn: Clean up unnecessary NUMA_NO_NODE check arm64/mm: use lm_alias() with addresses passed to memblock_free() mm: arm64: document why pte is not advanced in contpte_ptep_set_access_flags() arm64: Expose the end of the linear map in PHYSMEM_END arm64: trans_pgd: mark PTEs entries as valid to avoid dead kexec() arm64/mm: Delete __init region from memblock.reserved perf/arm-cmn: Support CMN S3 dt-bindings: perf: arm-cmn: Add CMN S3 perf/arm-cmn: Refactor DTC PMU register access perf/arm-cmn: Make cycle counts less surprising perf/arm-cmn: Improve build-time assertion ...
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‎Documentation/admin-guide/perf/arm-ni.rst

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====================================
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Arm Network-on Chip Interconnect PMU
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====================================
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NI-700 and friends implement a distinct PMU for each clock domain within the
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interconnect. Correspondingly, the driver exposes multiple PMU devices named
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arm_ni_<x>_cd_<y>, where <x> is an (arbitrary) instance identifier and <y> is
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the clock domain ID within that particular instance. If multiple NI instances
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exist within a system, the PMU devices can be correlated with the underlying
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hardware instance via sysfs parentage.
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Each PMU exposes base event aliases for the interface types present in its clock
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domain. These require qualifying with the "eventid" and "nodeid" parameters
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to specify the event code to count and the interface at which to count it
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(per the configured hardware ID as reflected in the xxNI_NODE_INFO register).
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The exception is the "cycles" alias for the PMU cycle counter, which is encoded
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with the PMU node type and needs no further qualification.

‎Documentation/admin-guide/perf/dwc_pcie_pmu.rst

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DesignWare Cores (DWC) PCIe PMU Driver
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=======================================
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This driver adds PMU devices for each PCIe Root Port named based on the BDF of
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This driver adds PMU devices for each PCIe Root Port named based on the SBDF of
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the Root Port. For example,
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30:03.0 PCI bridge: Device 1ded:8000 (rev 01)
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0001:30:03.0 PCI bridge: Device 1ded:8000 (rev 01)
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the PMU device name for this Root Port is dwc_rootport_3018.
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the PMU device name for this Root Port is dwc_rootport_13018.
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The DWC PCIe PMU driver registers a perf PMU driver, which provides
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description of available events and configuration options in sysfs, see
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/sys/bus/event_source/devices/dwc_rootport_{bdf}.
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/sys/bus/event_source/devices/dwc_rootport_{sbdf}.
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The "format" directory describes format of the config fields of the
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perf_event_attr structure. The "events" directory provides configuration
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$# perf list | grep dwc_rootport
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<...>
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dwc_rootport_3018/Rx_PCIe_TLP_Data_Payload/ [Kernel PMU event]
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dwc_rootport_13018/Rx_PCIe_TLP_Data_Payload/ [Kernel PMU event]
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<...>
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dwc_rootport_3018/rx_memory_read,lane=?/ [Kernel PMU event]
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dwc_rootport_13018/rx_memory_read,lane=?/ [Kernel PMU event]
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Time Based Analysis Event Usage
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-------------------------------
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Example usage of counting PCIe RX TLP data payload (Units of bytes)::
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$# perf stat -a -e dwc_rootport_3018/Rx_PCIe_TLP_Data_Payload/
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$# perf stat -a -e dwc_rootport_13018/Rx_PCIe_TLP_Data_Payload/
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The average RX/TX bandwidth can be calculated using the following formula:
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Each lane has the same event set and to avoid generating a list of hundreds
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of events, the user need to specify the lane ID explicitly, e.g.::
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$# perf stat -a -e dwc_rootport_3018/rx_memory_read,lane=4/
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$# perf stat -a -e dwc_rootport_13018/rx_memory_read,lane=4/
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The driver does not support sampling, therefore "perf record" will not
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work. Per-task (without "-a") perf sessions are not supported.

‎Documentation/admin-guide/perf/hisi-pcie-pmu.rst

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PMU hardware device.
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The "bus" sysfs file allows users to get the bus number of Root Ports
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monitored by PMU.
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monitored by PMU. Furthermore users can get the Root Ports range in
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[bdf_min, bdf_max] from "bdf_min" and "bdf_max" sysfs attributes
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respectively.
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Example usage of perf::
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‎Documentation/admin-guide/perf/index.rst

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starfive_starlink_pmu
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arm-ccn
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arm-cmn
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arm-ni
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xgene-pmu
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arm_dsu_pmu
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thunderx2-pmu

‎Documentation/arch/arm64/elf_hwcaps.rst

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HWCAP2_SME_SF8DP4
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Functionality implied by ID_AA64SMFR0_EL1.SF8DP4 == 0b1.
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HWCAP2_POE
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Functionality implied by ID_AA64MMFR3_EL1.S1POE == 0b0001.
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4. Unused AT_HWCAP bits
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-----------------------

‎Documentation/arch/arm64/silicon-errata.rst

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+----------------+-----------------+-----------------+-----------------------------+
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| Ampere | AmpereOne | AC03_CPU_38 | AMPERE_ERRATUM_AC03_CPU_38 |
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+----------------+-----------------+-----------------+-----------------------------+
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| Ampere | AmpereOne AC04 | AC04_CPU_10 | AMPERE_ERRATUM_AC03_CPU_38 |
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+----------------+-----------------+-----------------+-----------------------------+
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+----------------+-----------------+-----------------+-----------------------------+
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| ARM | Cortex-A510 | #2457168 | ARM64_ERRATUM_2457168 |
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+----------------+-----------------+-----------------+-----------------------------+
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+----------------+-----------------+-----------------+-----------------------------+
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| Hisilicon | Hip08 SMMU PMCG | #162001800 | N/A |
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+----------------+-----------------+-----------------+-----------------------------+
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| Hisilicon | Hip08 SMMU PMCG | #162001900 | N/A |
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| | Hip09 SMMU PMCG | | |
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| Hisilicon | Hip{08,09,10,10C| #162001900 | N/A |
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| | ,11} SMMU PMCG | | |
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+----------------+-----------------+-----------------+-----------------------------+
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+----------------+-----------------+-----------------+-----------------------------+
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| Qualcomm Tech. | Kryo/Falkor v1 | E1003 | QCOM_FALKOR_ERRATUM_1003 |

‎Documentation/devicetree/bindings/perf/arm,cmn.yaml

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- arm,cmn-600
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- arm,cmn-650
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- arm,cmn-700
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- arm,cmn-s3
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- arm,ci-700
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reg:

‎Documentation/devicetree/bindings/perf/arm,ni.yaml

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# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/perf/arm,ni.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Arm NI (Network-on-Chip Interconnect) Performance Monitors
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maintainers:
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- Robin Murphy <[email protected]>
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properties:
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compatible:
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const: arm,ni-700
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reg:
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items:
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- description: Complete configuration register space
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interrupts:
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minItems: 1
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maxItems: 32
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description: Overflow interrupts, one per clock domain, in order of domain ID
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required:
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- compatible
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- reg
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- interrupts
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additionalProperties: false

‎Documentation/virt/kvm/arm/hypercalls.rst

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----------------------------------------
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See ptp_kvm.rst
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``ARM_SMCCC_KVM_FUNC_HYP_MEMINFO``
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----------------------------------
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Query the memory protection parameters for a pKVM protected virtual machine.
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+---------------------+-------------------------------------------------------------+
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| Presence: | Optional; pKVM protected guests only. |
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+---------------------+-------------------------------------------------------------+
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| Calling convention: | HVC64 |
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+---------------------+----------+--------------------------------------------------+
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| Function ID: | (uint32) | 0xC6000002 |
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+---------------------+----------+----+---------------------------------------------+
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| Arguments: | (uint64) | R1 | Reserved / Must be zero |
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| +----------+----+---------------------------------------------+
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| | (uint64) | R2 | Reserved / Must be zero |
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| +----------+----+---------------------------------------------+
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| | (uint64) | R3 | Reserved / Must be zero |
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+---------------------+----------+----+---------------------------------------------+
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| Return Values: | (int64) | R0 | ``INVALID_PARAMETER (-3)`` on error, else |
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| | | | memory protection granule in bytes |
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+---------------------+----------+----+---------------------------------------------+
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``ARM_SMCCC_KVM_FUNC_MEM_SHARE``
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--------------------------------
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Share a region of memory with the KVM host, granting it read, write and execute
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permissions. The size of the region is equal to the memory protection granule
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advertised by ``ARM_SMCCC_KVM_FUNC_HYP_MEMINFO``.
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+---------------------+-------------------------------------------------------------+
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| Presence: | Optional; pKVM protected guests only. |
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+---------------------+-------------------------------------------------------------+
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| Calling convention: | HVC64 |
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+---------------------+----------+--------------------------------------------------+
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| Function ID: | (uint32) | 0xC6000003 |
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+---------------------+----------+----+---------------------------------------------+
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| Arguments: | (uint64) | R1 | Base IPA of memory region to share |
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| +----------+----+---------------------------------------------+
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| | (uint64) | R2 | Reserved / Must be zero |
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| +----------+----+---------------------------------------------+
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| | (uint64) | R3 | Reserved / Must be zero |
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+---------------------+----------+----+---------------------------------------------+
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| Return Values: | (int64) | R0 | ``SUCCESS (0)`` |
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| | | +---------------------------------------------+
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| | | | ``INVALID_PARAMETER (-3)`` |
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+---------------------+----------+----+---------------------------------------------+
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``ARM_SMCCC_KVM_FUNC_MEM_UNSHARE``
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----------------------------------
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Revoke access permission from the KVM host to a memory region previously shared
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with ``ARM_SMCCC_KVM_FUNC_MEM_SHARE``. The size of the region is equal to the
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memory protection granule advertised by ``ARM_SMCCC_KVM_FUNC_HYP_MEMINFO``.
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+---------------------+-------------------------------------------------------------+
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| Presence: | Optional; pKVM protected guests only. |
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+---------------------+-------------------------------------------------------------+
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| Calling convention: | HVC64 |
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+---------------------+----------+--------------------------------------------------+
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| Function ID: | (uint32) | 0xC6000004 |
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+---------------------+----------+----+---------------------------------------------+
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| Arguments: | (uint64) | R1 | Base IPA of memory region to unshare |
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| +----------+----+---------------------------------------------+
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| | (uint64) | R2 | Reserved / Must be zero |
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| +----------+----+---------------------------------------------+
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| | (uint64) | R3 | Reserved / Must be zero |
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+---------------------+----------+----+---------------------------------------------+
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| Return Values: | (int64) | R0 | ``SUCCESS (0)`` |
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| | | +---------------------------------------------+
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| | | | ``INVALID_PARAMETER (-3)`` |
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+---------------------+----------+----+---------------------------------------------+
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``ARM_SMCCC_KVM_FUNC_MMIO_GUARD``
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----------------------------------
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Request that a given memory region is handled as MMIO by the hypervisor,
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allowing accesses to this region to be emulated by the KVM host. The size of the
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region is equal to the memory protection granule advertised by
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``ARM_SMCCC_KVM_FUNC_HYP_MEMINFO``.
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+---------------------+-------------------------------------------------------------+
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| Presence: | Optional; pKVM protected guests only. |
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+---------------------+-------------------------------------------------------------+
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| Calling convention: | HVC64 |
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+---------------------+----------+--------------------------------------------------+
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| Function ID: | (uint32) | 0xC6000007 |
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+---------------------+----------+----+---------------------------------------------+
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| Arguments: | (uint64) | R1 | Base IPA of MMIO memory region |
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| +----------+----+---------------------------------------------+
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| | (uint64) | R2 | Reserved / Must be zero |
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| +----------+----+---------------------------------------------+
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| | (uint64) | R3 | Reserved / Must be zero |
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+---------------------+----------+----+---------------------------------------------+
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| Return Values: | (int64) | R0 | ``SUCCESS (0)`` |
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| | | +---------------------------------------------+
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| | | | ``INVALID_PARAMETER (-3)`` |
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+---------------------+----------+----+---------------------------------------------+

‎MAINTAINERS

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L: [email protected] (moderated for non-subscribers)
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S: Maintained
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F: drivers/acpi/arm64
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F: include/linux/acpi_iort.h
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ACPI FOR RISC-V (ACPI/riscv)
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M: Sunil V L <[email protected]>
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F: drivers/power/reset/arm-versatile-reboot.c
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F: drivers/soc/versatile/
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ARM INTERCONNECT PMU DRIVERS
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M: Robin Murphy <[email protected]>
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S: Supported
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F: Documentation/admin-guide/perf/arm-cmn.rst
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F: Documentation/admin-guide/perf/arm-ni.rst
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F: Documentation/devicetree/bindings/perf/arm,cmn.yaml
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F: Documentation/devicetree/bindings/perf/arm,ni.yaml
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F: drivers/perf/arm-cmn.c
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F: drivers/perf/arm-ni.c
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F: tools/perf/pmu-events/arch/arm64/arm/cmn/
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ARM KOMEDA DRM-KMS DRIVER
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M: Liviu Dudau <[email protected]>
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S: Supported

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