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2020-07-24io_uring: use completion list for CQ overflowPavel Begunkov
As with the completion path, also use compl.list for overflowed requests. If cleaned up properly, nobody needs per-op data there anymore. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-07-24io_uring: use inflight_entry list for iopoll'ingPavel Begunkov
req->inflight_entry is used to track requests that grabbed files_struct. Let's share it with iopoll list, because the only iopoll'ed ops are reads and writes, which don't need a file table. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-07-24io_uring: rename ctx->poll into ctx->iopollPavel Begunkov
It supports both polling and I/O polling. Rename ctx->poll to clearly show that it's only in I/O poll case. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-07-24io_uring: share completion list w/ per-op spacePavel Begunkov
Calling io_req_complete(req) means that the request is done, and there is nothing left but to clean it up. That also means that per-op data after that should not be used, so we're free to reuse it in completion path, e.g. to store overflow_list as done in this patch. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-07-24io_uring: follow **iovec idiom in io_import_iovecPavel Begunkov
As for import_iovec(), return !=NULL iovec from io_import_iovec() only when it should be freed. That includes returning NULL when iovec is already in req->io, because it should be deallocated by other means, e.g. inside op handler. After io_setup_async_rw() local iovec to ->io, just mark it NULL, to follow the idea in io_{read,write} as well. That's easier to follow, and especially useful if we want to reuse per-op space for completion data. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> [axboe: only call kfree() on non-NULL pointer] Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-07-24io_uring: add a helper for async rw iovec prepPavel Begunkov
Preparing reads/writes for async is a bit tricky. Extract a helper to not repeat it twice. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-07-24io_uring: simplify io_req_map_rw()Pavel Begunkov
Don't deref req->io->rw every time, but put it in a local variable. This looks prettier, generates less instructions, and doesn't break alias analysis. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-07-24io_uring: replace rw->task_work with rq->task_workPavel Begunkov
io_kiocb::task_work was de-unionised, and is not planned to be shared back, because it's too useful and commonly used. Hence, instead of keeping a separate task_work in struct io_async_rw just reuse req->task_work. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-07-24io_uring: extract io_sendmsg_copy_hdr()Pavel Begunkov
Don't repeat send msg initialisation code, it's error prone. Extract and use a helper function. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-07-24io_uring: use more specific type in rcv/snd msg cpPavel Begunkov
send/recv msghdr initialisation works with struct io_async_msghdr, but pulls the whole struct io_async_ctx for no reason. That complicates it with composite accessing, e.g. io->msg. Use and pass the most specific type, which is struct io_async_msghdr. It is the larget field in union io_async_ctx and doesn't save stack space, but looks clearer. The most of the changes are replacing "io->msg." with "iomsg->" Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-07-24io_uring: rename sr->msg into umsgPavel Begunkov
Every second field in send/recv is called msg, make it a bit more understandable by renaming ->msg, which is a user provided ptr, to ->umsg. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-07-24io_uring: fix sq array offset calculationDmitry Vyukov
rings_size() sets sq_offset to the total size of the rings (the returned value which is used for memory allocation). This is wrong: sq array should be located within the rings, not after them. Set sq_offset to where it should be. Fixes: 75b28affdd6a ("io_uring: allocate the two rings together") Signed-off-by: Dmitry Vyukov <dvyukov@google.com> Acked-by: Hristo Venev <hristo@venev.name> Cc: io-uring@vger.kernel.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-07-24driver core: Change delimiter in devlink device's name to "--"Saravana Kannan
The devlink device name is of the form "supplier:consumer". But ":" is fairly common in device names and makes it visually hard to distinguish supplier and consumer. So, replace it with "--" to make it easier. Signed-off-by: Saravana Kannan <saravanak@google.com> Link: https://lore.kernel.org/r/20200724180523.1393383-1-saravanak@google.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-07-24Merge branch 'io_uring-5.8' into for-5.9/io_uringJens Axboe
Merge in io_uring-5.8 fixes, as changes/cleanups to how we do locked mem accounting require a fixup, and only one of the spots are noticed by git as the other merges cleanly. The flags fix from io_uring-5.8 also causes a merge conflict, the leak fix for recvmsg, the double poll fix, and the link failure locking fix. * io_uring-5.8: io_uring: fix lockup in io_fail_links() io_uring: fix ->work corruption with poll_add io_uring: missed req_init_async() for IOSQE_ASYNC io_uring: always allow drain/link/hardlink/async sqe flags io_uring: ensure double poll additions work with both request types io_uring: fix recvmsg memory leak with buffer selection io_uring: fix not initialised work->flags io_uring: fix missing msg_name assignment io_uring: account user memory freed when exit has been queued io_uring: fix memleak in io_sqe_files_register() io_uring: fix memleak in __io_sqe_files_update() io_uring: export cq overflow status to userspace Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-07-24io_uring: fix lockup in io_fail_links()Pavel Begunkov
io_fail_links() doesn't consider REQ_F_COMP_LOCKED leading to nested spin_lock(completion_lock) and lockup. [ 197.680409] rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 6-... } 18239 jiffies s: 1421 root: 0x40/. [ 197.680411] rcu: blocking rcu_node structures: [ 197.680412] Task dump for CPU 6: [ 197.680413] link-timeout R running task 0 1669 1 0x8000008a [ 197.680414] Call Trace: [ 197.680420] ? io_req_find_next+0xa0/0x200 [ 197.680422] ? io_put_req_find_next+0x2a/0x50 [ 197.680423] ? io_poll_task_func+0xcf/0x140 [ 197.680425] ? task_work_run+0x67/0xa0 [ 197.680426] ? do_exit+0x35d/0xb70 [ 197.680429] ? syscall_trace_enter+0x187/0x2c0 [ 197.680430] ? do_group_exit+0x43/0xa0 [ 197.680448] ? __x64_sys_exit_group+0x18/0x20 [ 197.680450] ? do_syscall_64+0x52/0xa0 [ 197.680452] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-07-24io_uring: fix ->work corruption with poll_addPavel Begunkov
req->work might be already initialised by the time it gets into __io_arm_poll_handler(), which will corrupt it by using fields that are in an union with req->work. Luckily, the only side effect is missing put_creds(). Clean req->work before going there. Suggested-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-07-24Merge tag 'memory-controller-drv-5.9' of ↵Arnd Bergmann
git://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux into arm/drivers Memory controller drivers for v5.9 The drivers/memory directory with memory controller drivers, over the last days grew in numbers but lacked any coordinated care. The generic part (device tree helpers) were pulled in through various trees, depending on driver needs. The patchset is a first try to improve code quality of memory controller drivers. Mostly these are non-intrusive fixes for GCC, checkpatch or sparse warnings. This also fixes missing SPDX tags or improves generic code quality (whitespace, const correctness). Last commit appoints also Krzysztof Kozlowski as a maintainer. * tag 'memory-controller-drv-5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux: (22 commits) MAINTAINERS: Add Krzysztof Kozlowski as maintainer of memory controllers memory: samsung: exynos-srom: Describe the Kconfig entry memory: Describe the MEMORY Kconfig entry memory: da8xx-ddrctl: Remove unused 'node' variable memory: fsl_ifc: Fix whitespace issues memory: pl172: Add GPLv2 SPDX license header memory: omap-gpmc: Fix whitespace issue memory: omap-gpmc: Include <linux/sizes.h> for SZ_16M memory: mtk-smi: Add argument to function pointer definition memory: brcmstb_dpfe: Remove unneeded braces memory: brcmstb_dpfe: Constify the contents of string memory: ti-emif-pm: Fix cast to iomem pointer memory: ti-aemif: Rename SS to SSTROBE to avoid name conflicts memory: emif: Silence platform_get_irq() error in driver memory: emif: Fix whitespace coding style violations memory: emif: Put constant in comparison on the right side memory: emif-asm-offsets: Add GPLv2 SPDX license header memory: of: Remove unneeded extern from function declarations memory: of: Correct indentation memory: of: Remove __func__ in device related messages ... Link: https://lore.kernel.org/r/20200724160314.8543-1-krzk@kernel.org Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2020-07-24MAINTAINERS: arm/amlogic: add designated reviewersKevin Hilman
It's already been the case for some time that Neil, Jerome and Martin are doing the bulk of the important reviewing. Update MAINTAINERS to reflect reality. Link: https://lore.kernel.org/r/20200724184107.24600-1-khilman@baylibre.com Cc: Neil Armstrong <narmstrong@baylibre.com> Cc: Jerome Brunet <jbrunet@baylibre.com> Cc: Martin Blumenstingl <martin.blumenstingl@googlemail.com> Signed-off-by: Kevin Hilman <khilman@baylibre.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2020-07-24Merge tag 'misc-habanalabs-next-2020-07-24' of ↵Greg Kroah-Hartman
git://people.freedesktop.org/~gabbayo/linux into char-misc-next Oded writes: This tag contains the following changes for kernel 5.9-rc1: - Remove rate limiters from GAUDI configuration (no longer needed). - Set maximum amount of in-flight CS per ASIC type and increase the maximum amount for GAUDI. - Refactor signal/wait command submissions code - Calculate trace frequency from PLLs to show accurate profiling data - Rephrase error messages to make them more clear to the common user - Add statistics of dropped CS (counter per possible reason for drop) - Get ECC information from firmware - Remove support for partial SoC reset in Gaudi - Halt device CPU only when reset is certain to happen. Sometimes we abort the reset procedure and in that case we can't leave device CPU in halt mode. - set each CQ to its own work queue to prevent a race between completions on different CQs. - Use queue pi/ci in order to determine queue occupancy. This is done to make the code reusable between current and future ASICs. - Add more validations for user inputs. - Refactor PCIe controller configuration to make the code reusable between current and future ASICs. - Update firmware interface headers to latest version - Move all common code to a dedicated common sub-folder * tag 'misc-habanalabs-next-2020-07-24' of git://people.freedesktop.org/~gabbayo/linux: (28 commits) habanalabs: Fix memory leak in error flow of context initialization habanalabs: use no flags on MMU cache invalidation habanalabs: enable device before hw_init() habanalabs: create internal CB pool habanalabs: update hl_boot_if.h from firmware habanalabs: create common folder habanalabs: check for DMA errors when clearing memory habanalabs: verify queue can contain all cs jobs habanalabs: Assign each CQ with its own work queue habanalabs: halt device CPU only upon certain reset habanalabs: remove unused hash habanalabs: use queue pi/ci in order to determine queue occupancy habanalabs: configure maximum queues per asic habanalabs: remove soft-reset support from GAUDI habanalabs: PCIe iATU refactoring habanalabs: Extract ECC information from FW habanalabs: Add dropped cs statistics info struct habanalabs: extract cpu boot status lookup habanalabs: rephrase error messages habanalabs: Increase queues depth ...
2020-07-24habanalabs: Fix memory leak in error flow of context initializationTomer Tayar
Add a missing free of the cs_pending array in the error flow of context initialization. Fixes: c16d45f42b64 ("habanalabs: Use pending CS amount per ASIC") Signed-off-by: Tomer Tayar <ttayar@habana.ai> Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2020-07-24habanalabs: use no flags on MMU cache invalidationTomer Tayar
gaudi_mmu_invalidate_cache() doesn't use the flags parameter, and thus it can be set to 0 when the function is called in the gaudi only files. Signed-off-by: Tomer Tayar <ttayar@habana.ai> Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2020-07-24habanalabs: enable device before hw_init()Oded Gabbay
Device is now enabled before the hw_init() because part of the initialization requires communication with the device firmware to get information that is required for the initialization itself Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com> Reviewed-by: Tomer Tayar <ttayar@habana.ai>
2020-07-24habanalabs: create internal CB poolOfir Bitton
Create a device MMU-mapped internal command buffer pool, in order to allow the driver to allocate CBs for the signal/wait operations that are fetched by the queues when they are configured with the user's address space ID. We must pre-map this internal pool due to performance issues. This pool is needed for future ASIC support and it is currently unused in GOYA and GAUDI. Signed-off-by: Ofir Bitton <obitton@habana.ai> Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2020-07-24habanalabs: update hl_boot_if.h from firmwareOded Gabbay
Update the boot interface file from the latest version from firmware. Defines for secure boot were added. Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com> Reviewed-by: Omer Shpigelman <oshpigelman@habana.ai>
2020-07-24habanalabs: create common folderOded Gabbay
For internal needs of our CI we need to move all the common code into a common folder instead of putting them in the root folder of the driver. Same applies to the common header files under include/ Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com> Reviewed-by: Omer Shpigelman <oshpigelman@habana.ai>
2020-07-24habanalabs: check for DMA errors when clearing memoryMoti Haimovski
In GAUDI we use QMAN0 DMA for clearing the MMU memory region at initialization. if this operation fails it places the DMA in an error state and then when trying to initialize QMAN0 we fail and erroneously assume its the QMAN that failed. This commit adds a check and clear of such DMA errors at initialization so we will have a better understanding of what went wrong. Signed-off-by: Moti Haimovski <mhaimovski@habana.ai> Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2020-07-24habanalabs: verify queue can contain all cs jobsOfir Bitton
In order for the user to be aware of wrong inputs, we must return error in case the amount of jobs per cs exceeds the corresponding queue size. Signed-off-by: Ofir Bitton <obitton@habana.ai> Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2020-07-24habanalabs: Assign each CQ with its own work queueOfir Bitton
We identified a possible race during job completion when working with a single multi-threaded work queue. In order to overcome this race we suggest using a single threaded work queue per completion queue, hence we guarantee jobs completion in order. Signed-off-by: Ofir Bitton <obitton@habana.ai> Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2020-07-24habanalabs: halt device CPU only upon certain resetOded Gabbay
Currently the driver halts the device CPU in the halt engines function, which halts all the engines of the ASIC. The problem is that if later on we stop the reset process (due to inability to clean memory mappings in time), the CPU will remain in halt mode. This creates many issues, such as thermal/power control and FLR handling. Therefore, move the halting of the device CPU to the very end of the reset process, just before writing to the registers to initiate the reset. In addition, the driver now needs to send a message to the device F/W to disable it from sending interrupts to the host machine because during halt engines function the driver disables the MSI/MSI-X interrupts. Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com> Reviewed-by: Tomer Tayar <ttayar@habana.ai>
2020-07-24habanalabs: remove unused hashOmer Shpigelman
Remove an old hash that is not in use anymore. Signed-off-by: Omer Shpigelman <oshpigelman@habana.ai> Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2020-07-24habanalabs: use queue pi/ci in order to determine queue occupancyOfir Bitton
Instead of using the free slots amount on the compute CQ to determine whether we can submit work to queues, use the queues pi/ci. This is needed in future ASICs where we don't have CQ per queue. Signed-off-by: Ofir Bitton <obitton@habana.ai> Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2020-07-24habanalabs: configure maximum queues per asicOfir Bitton
Currently the amount of maximum queues is statically configured. Using a static value is causing redundunt cycles when traversing all queues and consumes more memory than actually needed. In this patch we configure each asic with the exact number of queues needed. Signed-off-by: Ofir Bitton <obitton@habana.ai> Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2020-07-24habanalabs: remove soft-reset support from GAUDIOded Gabbay
Soft-reset isn't supported in GAUDI. Remove the code that performs it and print error in case the user wants to do it via sysfs. Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com> Reviewed-by: Tomer Tayar <ttayar@habana.ai>
2020-07-24habanalabs: PCIe iATU refactoringOfir Bitton
Divide iATU initialization into inbound/outbound methods. We must separate it in order to enable different match mode per PCIe region. In addition, added support for PCI address match mode. Signed-off-by: Ofir Bitton <obitton@habana.ai> Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2020-07-24habanalabs: Extract ECC information from FWOded Gabbay
ECC (Error Correcting Code) interrupts are going to be handled by the FW. Hence, we define an interface in which the driver can obtain the relevant ECC information. This information is needed for monitoring and can also lead to a hard reset if ECC error is not correctable. Signed-off-by: Ofir Bitton <obitton@habana.ai> Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2020-07-24habanalabs: Add dropped cs statistics info structOfir Bitton
Add command submission statistics structure which can be obtained through the info ioctl. Each drop counter describes the reason for which the command submission was dropped. This information is needed for the user to be aware of the specific reason for which the submitted work was dropped. The user can then utilize the driver more efficiently. Signed-off-by: Ofir Bitton <obitton@habana.ai> Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2020-07-24habanalabs: extract cpu boot status lookupChristine Gharzuzi
Extract detection of the cpu boot status to a function to allow code reuse Signed-off-by: Christine Gharzuzi <cgharzuzi@habana.ai> Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2020-07-24habanalabs: rephrase error messagesOded Gabbay
rephrase some error/warning/notice messages to make them more accessible to ordinary users. There is no need to print context ASID as the driver currently doesn't support multiple contexts. Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com> Reviewed-by: Tomer Tayar <ttayar@habana.ai>
2020-07-24habanalabs: Increase queues depthOfir Bitton
After recent concurrent cs amount increase, we must also increase queues depth since much more concurrent work can be done. All external queue depths were increased to 4096 as gaudi's internal queue depths were also increased to 1024. Signed-off-by: Ofir Bitton <obitton@habana.ai> Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2020-07-24habanalabs: rephrase error messageOmer Shpigelman
Rephrase F/W error message to make it more understandable to ordinary users. Signed-off-by: Omer Shpigelman <oshpigelman@habana.ai> Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2020-07-24habanalabs: calculate trace frequency from PLLAdam Aharon
The profiler needs to know the PLL values for correctly showing the profiling data. Because our firmware can use different PLL configurations, we need to read the PLL values from the ASIC to pass them to the profiler. Signed-off-by: Adam Aharon <aaharon@habana.ai> Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2020-07-24habanalabs: align armcp_packet structure to 8 bytesOded Gabbay
Once there is a 64-bit field in a structure, GCC compiler for ARM aligns the structure to 8 bytes. In order to avoid confusion when these structures are being passed between CPUs from different architectures, we explicitly align the structure to 8 bytes. Reviewed-by: Omer Shpigelman <oshpigelman@habana.ai> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2020-07-24uapi/habanalabs: fix some commentsOded Gabbay
MAP/UNMAP are done also for device memory. Reviewed-by: Omer Shpigelman <oshpigelman@habana.ai> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2020-07-24habanalabs: Use mask instead of shift in sync stream registersOfir Bitton
Use proper bitfield masks instead of shifting values when configuring packets sent to device. Signed-off-by: Ofir Bitton <obitton@habana.ai> Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2020-07-24habanalabs: sync stream generic functionalityOfir Bitton
Currently sync stream is limited only for external queues. We want to remove this constraint by adding a new queue property dedicated for sync stream. In addition we move the initialization and reset methods to the common code since we can re-use them with slight changes. Signed-off-by: Ofir Bitton <obitton@habana.ai> Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2020-07-24habanalabs: Use pending CS amount per ASICOfir Bitton
Training schemes requires much more concurrent command submissions than inference does. In addition, training command submissions can be completed in a non serialized manner. Hence, we add support in which each ASIC will be able to configure the amount of concurrent pending command submissions, rather than use a predefined amount. This change will enhance performance by allowing the user to add more concurrent work without waiting for the previous work to be completed. Signed-off-by: Ofir Bitton <obitton@habana.ai> Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2020-07-24habanalabs: remove rate limiters from GAUDIOded Gabbay
We no longer need to initialize the rate limiters in GAUDI A1. Reviewed-by: Omer Shpigelman <oshpigelman@habana.ai> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2020-07-24arm64: enable time namespace supportAndrei Vagin
CONFIG_TIME_NS is dependes on GENERIC_VDSO_TIME_NS. Signed-off-by: Andrei Vagin <avagin@gmail.com> Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Reviewed-by: Dmitry Safonov <dima@arista.com> Link: https://lore.kernel.org/r/20200624083321.144975-7-avagin@gmail.com Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2020-07-24arm64/vdso: Restrict splitting VVAR VMAAndrei Vagin
Forbid splitting VVAR VMA resulting in a stricter ABI and reducing the amount of corner-cases to consider while working further on VDSO time namespace support. As the offset from timens to VVAR page is computed compile-time, the pages in VVAR should stay together and not being partically mremap()'ed. Signed-off-by: Andrei Vagin <avagin@gmail.com> Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Reviewed-by: Dmitry Safonov <dima@arista.com> Link: https://lore.kernel.org/r/20200624083321.144975-6-avagin@gmail.com Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2020-07-24arm64/vdso: Handle faults on timens pageAndrei Vagin
If a task belongs to a time namespace then the VVAR page which contains the system wide VDSO data is replaced with a namespace specific page which has the same layout as the VVAR page. Signed-off-by: Andrei Vagin <avagin@gmail.com> Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Reviewed-by: Dmitry Safonov <dima@arista.com> Link: https://lore.kernel.org/r/20200624083321.144975-5-avagin@gmail.com Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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