kernel/linux.git/Documentation/ABI/stable, branch v6.1.174

dmaengine: idxd: Make read buffer sysfs attributes invisible for Intel IAA

2022-12-31T12:32:47+00:00

[ Upstream commit 9a8ddb35a9d5d3ad76784a012459b256a9d7de7e ] In current code, the following sysfs attributes are exposed to user to show or update the values: max_read_buffers (max_tokens) read_buffer_limit (token_limit) group/read_buffers_allowed (group/tokens_allowed) group/read_buffers_reserved (group/tokens_reserved) group/use_read_buffer_limit (group/use_token_limit) >From Intel IAA spec [1], Intel IAA does not support Read Buffer allocation control. So these sysfs attributes should not be supported on IAA device. Fix this issue by making these sysfs attributes invisible through is_visible() filter when the device is IAA. Add description in the ABI documentation to mention that these attributes are not visible when the device does not support Read Buffer allocation control. [1]: https://cdrdv2.intel.com/v1/dl/getContent/721858 Fixes: fde212e44f45 ("dmaengine: idxd: deprecate token sysfs attributes for read buffers") Fixes: c52ca478233c ("dmaengine: idxd: add configuration component of driver") Signed-off-by: Xiaochen Shen Reviewed-by: Dave Jiang Link: https://lore.kernel.org/r/20221022074949.11719-1-xiaochen.shen@intel.com Signed-off-by: Vinod Koul Signed-off-by: Sasha Levin

dmaengine: idxd: Make max batch size attributes in sysfs invisible for Intel IAA

2022-12-31T12:32:46+00:00

[ Upstream commit 91123b37e8a99cc489d5bdcfebd1c25f29382504 ] In current code, dev.max_batch_size and wq.max_batch_size attributes in sysfs are exposed to user to show or update the values. >From Intel IAA spec [1], Intel IAA does not support batch processing. So these sysfs attributes should not be supported on IAA device. Fix this issue by making the attributes of max_batch_size invisible in sysfs through is_visible() filter when the device is IAA. Add description in the ABI documentation to mention that the attributes are not visible when the device does not support batch. [1]: https://cdrdv2.intel.com/v1/dl/getContent/721858 Fixes: e7184b159dd3 ("dmaengine: idxd: add support for configurable max wq batch size") Fixes: c52ca478233c ("dmaengine: idxd: add configuration component of driver") Signed-off-by: Xiaochen Shen Reviewed-by: Dave Jiang Reviewed-by: Fenghua Yu Link: https://lore.kernel.org/r/20220930201528.18621-3-xiaochen.shen@intel.com Signed-off-by: Vinod Koul Signed-off-by: Sasha Levin

dmaengine: idxd: add configuration for concurrent batch descriptor processing

2022-09-29T17:16:08+00:00

Add sysfs knob to allow control of the number of batch descriptors that can be concurrently processed by an engine in the group as a fraction of the Maximum Work Descriptors in Progress value specfied in ENGCAP register. This control knob is part of toggle for QoS control. Signed-off-by: Dave Jiang Co-developed-by: Fenghua Yu Signed-off-by: Fenghua Yu Link: https://lore.kernel.org/r/20220917161222.2835172-6-fenghua.yu@intel.com Signed-off-by: Vinod Koul

dmaengine: idxd: add configuration for concurrent work descriptor processing

2022-09-29T17:16:08+00:00

Add sysfs knob to allow control of the number of work descriptors that can be concurrently processed by an engine in the group as a fraction of the Maximum Work Descriptors in Progress value specified in ENGCAP register. This control knob is part of toggle for QoS control. Signed-off-by: Dave Jiang Co-developed-by: Fenghua Yu Signed-off-by: Fenghua Yu Link: https://lore.kernel.org/r/20220917161222.2835172-5-fenghua.yu@intel.com Signed-off-by: Vinod Koul

dmaengine: idxd: add WQ operation cap restriction support

2022-09-29T17:16:08+00:00

DSA 2.0 add the capability of configuring DMA ops on a per workqueue basis. This means that certain ops can be disabled by the system administrator for certain wq. By default, all ops are available. A bitmap is used to store the ops due to total op size of 256 bits and it is more convenient to use a range list to specify which bits are enabled. One of the usage to support this is for VM migration between different iteration of devices. The newer ops are disabled in order to allow guest to migrate to a host that only support older ops. Another usage is to restrict the WQ to certain operations for QoS of performance. A sysfs of ops_config attribute is added per wq. It is only usable when the ops_config bit is set under WQ_CAP register. This means that this attribute will return -EOPNOTSUPP on DSA 1.x devices. The expected input is a range list for the bits per operation the WQ supports. Signed-off-by: Dave Jiang Co-developed-by: Fenghua Yu Signed-off-by: Fenghua Yu Link: https://lore.kernel.org/r/20220917161222.2835172-4-fenghua.yu@intel.com Signed-off-by: Vinod Koul

Merge tag 'platform-drivers-x86-v6.0-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86

2022-08-05T01:19:14+00:00

Pull x86 platform driver updates from Hans de Goede: - Microsoft Surface: - SSAM hot unplug support - Surface Pro 8 keyboard cover support - Tablet mode switch support for Surface Pro 8 and Surface Laptop Studio - thinkpad_acpi: - AMD Automatice Mode Transitions (AMT) support - Mellanox: - Vulcan chassis COMe NVSwitch management support - XH3000 support - New generic/shared Intel P2SB (Primary to Sideband) support - Lots of small cleanups - Various small bugfixes - Various new hardware ids / quirks additions * tag 'platform-drivers-x86-v6.0-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86: (105 commits) platform/x86/intel/vsec: Fix wrong type for local status variables platform/x86: p2sb: Move out of X86_PLATFORM_DEVICES dependency platform/x86: pmc_atom: Fix comment typo platform/surface: gpe: Add support for 13" Intel version of Surface Laptop 4 platform/olpc: Fix uninitialized data in debugfs write platform/mellanox: mlxreg-lc: Fix error flow and extend verbosity platform/x86: pmc_atom: Match all Lex BayTrail boards with critclk_systems DMI table platform/x86: sony-laptop: Remove useless comparisons in sony_pic_read_possible_resource() tools/power/x86/intel-speed-select: Remove unneeded semicolon tools/power/x86/intel-speed-select: Fix off by one check platform/surface: tabletsw: Fix __le32 integer access Documentation/ABI: Add new attributes for mlxreg-io sysfs interfaces Documentation/ABI: mlxreg-io: Fix contact info platform/mellanox: mlxreg-io: Add locking for io operations platform/x86: mlx-platform: Add COME board revision register platform/x86: mlx-platform: Add support for new system XH3000 platform/x86: mlx-platform: Introduce support for COMe NVSwitch management module for Vulcan chassis platform/x86: mlx-platform: Add support for systems equipped with two ASICs platform/x86: mlx-platform: Add cosmetic changes for alignment platform/x86: mlx-platform: Make activation of some drivers conditional ...

Merge tag 'driver-core-6.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

2022-08-04T18:31:20+00:00

Pull driver core / kernfs updates from Greg KH: "Here is the set of driver core and kernfs changes for 6.0-rc1. The "biggest" thing in here is some scalability improvements for kernfs for large systems. Other than that, included in here are: - arch topology and cache info changes that have been reviewed and discussed a lot. - potential error path cleanup fixes - deferred driver probe cleanups - firmware loader cleanups and tweaks - documentation updates - other small things All of these have been in the linux-next tree for a while with no reported problems" * tag 'driver-core-6.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (63 commits) docs: embargoed-hardware-issues: fix invalid AMD contact email firmware_loader: Replace kmap() with kmap_local_page() sysfs docs: ABI: Fix typo in comment kobject: fix Kconfig.debug "its" grammar kernfs: Fix typo 'the the' in comment docs: driver-api: firmware: add driver firmware guidelines. (v3) arch_topology: Fix cache attributes detection in the CPU hotplug path ACPI: PPTT: Leave the table mapped for the runtime usage cacheinfo: Use atomic allocation for percpu cache attributes drivers/base: fix userspace break from using bin_attributes for cpumap and cpulist MAINTAINERS: Change mentions of mpm to olivia docs: ABI: sysfs-devices-soc: Update Lee Jones' email address docs: ABI: sysfs-class-pwm: Update Lee Jones' email address Documentation/process: Add embargoed HW contact for LLVM Revert "kernfs: Change kernfs_notify_list to llist." ACPI: Remove the unused find_acpi_cpu_cache_topology() arch_topology: Warn that topology for nested clusters is not supported arch_topology: Add support for parsing sockets in /cpu-map arch_topology: Set cluster identifier in each core/thread from /cpu-map arch_topology: Limit span of cpu_clustergroup_mask() ...

sysfs docs: ABI: Fix typo in comment

2022-07-28T14:32:33+00:00

Fix typo in the comment Signed-off-by: Slark Xiao Link: https://lore.kernel.org/r/20220721020623.20974-1-slark_xiao@163.com Signed-off-by: Greg Kroah-Hartman

Documentation/ABI: Add new attributes for mlxreg-io sysfs interfaces

2022-07-14T21:00:21+00:00

Add documentation for the new attributes: - "asic2_health" - health of 2-nd ASIC for system equipped with two ASICs. - "asic_reset" and "asic2_reset" - ASICs reset control. - "comm_chnl_ready" - communication channel indication to remote end (BMC). - "config3" - indication of system minor BOM changes. Signed-off-by: Vadim Pasternak Link: https://lore.kernel.org/r/20220711084559.62447-10-vadimp@nvidia.com Reviewed-by: Hans de Goede Signed-off-by: Hans de Goede

Documentation/ABI: mlxreg-io: Fix contact info

2022-07-14T20:34:45+00:00

Fix e-mail in contact fields. Signed-off-by: Vadim Pasternak Link: https://lore.kernel.org/r/20220711084559.62447-9-vadimp@nvidia.com Reviewed-by: Hans de Goede Signed-off-by: Hans de Goede