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2020-11-18bus: mhi: core: Expose mhi_get_exec_env() API for controllersBhaumik Bhatt1-0/+6
The mhi_get_exec_env() APIs can be used by the controller drivers to query the execution environment of the MHI device. Expose it so it can be used in some scenarios to determine behavior of controllers. Signed-off-by: Bhaumik Bhatt <[email protected]> Reviewed-by: Manivannan Sadhasivam <[email protected]> Signed-off-by: Manivannan Sadhasivam <[email protected]>
2020-11-18dma-mapping: remove the dma_direct_set_offset exportChristoph Hellwig2-7/+3
Drop the dma_direct_set_offset export and move the declaration to dma-map-ops.h now that the Allwinner drivers have stopped calling it. Signed-off-by: Christoph Hellwig <[email protected]> Signed-off-by: Maxime Ripard <[email protected]>
2020-11-18bus: mhi: Remove auto-start optionLoic Poulain1-2/+0
There is really no point having an auto-start for channels. This is confusing for the device drivers, some have to enable the channels, others don't have... and waste resources (e.g. pre allocated buffers) that may never be used. This is really up to the MHI device(channel) driver to manage the state of its channels. While at it, let's also remove the auto-start option from ath11k mhi controller. Signed-off-by: Loic Poulain <[email protected]> Acked-by: Kalle Valo <[email protected]> Reviewed-by: Manivannan Sadhasivam <[email protected]> [mani: clubbed ath11k change] Signed-off-by: Manivannan Sadhasivam <[email protected]>
2020-11-17Merge tag 'v5.9' into nextDmitry Torokhov703-8130/+22998
Sync up with mainline to bring in the latest DTS files.
2020-11-17net: core: fix some kernel-doc markupsMauro Carvalho Chehab1-2/+9
Some identifiers have different names between their prototypes and the kernel-doc markup. In the specific case of netif_subqueue_stopped(), keep the current markup for __netif_subqueue_stopped(), adding a new one for netif_subqueue_stopped(). Signed-off-by: Mauro Carvalho Chehab <[email protected]> Signed-off-by: Jakub Kicinski <[email protected]>
2020-11-17net: wan: Delete the DLCI / SDLA driversXie He2-332/+0
The DLCI driver (dlci.c) implements the Frame Relay protocol. However, we already have another newer and better implementation of Frame Relay provided by the HDLC_FR driver (hdlc_fr.c). The DLCI driver's implementation of Frame Relay is used by only one hardware driver in the kernel - the SDLA driver (sdla.c). The SDLA driver provides Frame Relay support for the Sangoma S50x devices. However, the vendor provides their own driver (along with their own multi-WAN-protocol implementations including Frame Relay), called WANPIPE. I believe most users of the hardware would use the vendor-provided WANPIPE driver instead. (The WANPIPE driver was even once in the kernel, but was deleted in commit 8db60bcf3021 ("[WAN]: Remove broken and unmaintained Sangoma drivers.") because the vendor no longer updated the in-kernel WANPIPE driver.) Cc: Mike McLagan <[email protected]> Signed-off-by: Xie He <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Jakub Kicinski <[email protected]>
2020-11-17Merge tag 'intel-gpio-v5.11-1' of ↵Linus Walleij1-2/+2
gitolite.kernel.org:pub/scm/linux/kernel/git/andy/linux-gpio-intel into devel intel-gpio for v5.11-1 * Refactor GPIO library to support bias and debounce ACPI settings The following is an automated git shortlog grouped by driver: gpiolib: - acpi: Make Intel GPIO tree official for GPIO ACPI work - acpi: Use BIT() macro to increase readability - acpi: Convert pin_index to be u16 - acpi: Extract acpi_request_own_gpiod() helper - acpi: Make acpi_gpio_to_gpiod_flags() usable for GpioInt() - acpi: Set initial value for output pin based on bias and polarity - acpi: Move acpi_gpio_to_gpiod_flags() upper in the code - acpi: Move non-critical code outside of critical section - acpi: Take into account debounce settings - acpi: Use named item for enum gpiod_flags variable - acpi: Respect bias settings for GpioInt() resource - Introduce gpio_set_debounce_timeout() for internal use - Extract gpio_set_config_with_argument_optional() helper - move bias related code from gpio_set_config() to gpio_set_bias() - Extract gpio_set_config_with_argument() for future use - use proper API to pack pin configuration parameters - add missed break statement - Replace unsigned by unsigned int Merge tag 'intel-pinctrl-v5.10-2' into HEAD: - Merge tag 'intel-pinctrl-v5.10-2' into HEAD pinctrl: - intel: Set default bias in case no particular value given - intel: Fix 2 kOhm bias which is 833 Ohm
2020-11-17Merge tag 'v5.10-rc4' into develLinus Walleij43-1688/+300
Linux 5.10-rc4
2020-11-17dma-mapping: remove dma_virt_opsChristoph Hellwig1-2/+0
Now that the RDMA core deals with devices that only do DMA mapping in lower layers properly, there is no user for dma_virt_ops and it can be removed. Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Christoph Hellwig <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]>
2020-11-17net: linux/skbuff.h: combine SKB_EXTENSIONS + KCOV handlingRandy Dunlap1-2/+2
The previous Kconfig patch led to some other build errors as reported by the 0day bot and my own overnight build testing. These are all in <linux/skbuff.h> when KCOV is enabled but SKB_EXTENSIONS is not enabled, so fix those by combining those conditions in the header file. Fixes: 6370cc3bbd8a ("net: add kcov handle to skb extensions") Fixes: 85ce50d337d1 ("net: kcov: don't select SKB_EXTENSIONS when there is no NET") Signed-off-by: Randy Dunlap <[email protected]> Reported-by: kernel test robot <[email protected]> Cc: Aleksandr Nogikh <[email protected]> Cc: Willem de Bruijn <[email protected]> Acked-by: Florian Westphal <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Jakub Kicinski <[email protected]>
2020-11-17resource: Introduce resource_intersection() for overlapping resourcesAndy Shevchenko1-0/+10
There will be at least one user that can utilize new helper. Provide the helper for future user and for wider use. Signed-off-by: Andy Shevchenko <[email protected]> Reviewed-by: Hanjun Guo <[email protected]> Signed-off-by: Rafael J. Wysocki <[email protected]>
2020-11-17resource: Introduce resource_union() for overlapping resourcesAndy Shevchenko1-1/+12
Some already present users may utilize resource_union() helper. Provide it for them and for wider use in the future. Signed-off-by: Andy Shevchenko <[email protected]> Reviewed-by: Hanjun Guo <[email protected]> Tested-by: Hanjun Guo <[email protected]> Signed-off-by: Rafael J. Wysocki <[email protected]>
2020-11-17resource: Group resource_overlaps() with other inline helpersAndy Shevchenko1-6/+5
For better maintenance group resource_overlaps() with other inline helpers. While at it, drop extra parentheses. Signed-off-by: Andy Shevchenko <[email protected]> Reviewed-by: Hanjun Guo <[email protected]> Tested-by: Hanjun Guo <[email protected]> Signed-off-by: Rafael J. Wysocki <[email protected]>
2020-11-17mm: memblock: drop __init from memblock functions to make it inlineFaiyaz Mohammed1-9/+9
__init is used with inline due to which memblock wraper functions are not getting inline. for example: [ 0.000000] memblock_alloc_try_nid: 1490 bytes align=0x40 nid=-1 from=0x0000000000000000 max_addr=0x0000000000000000 memblock_alloc+0x20/0x2c [ 0.000000] memblock_reserve: [0x000000023f09a3c0-0x000000023f09a991] memblock_alloc_range_nid+0xc0/0x188 Dropping __init from memblock wrapper functions to make it inline and it increase the debugability. After: [ 0.000000] memblock_alloc_try_nid: 1490 bytes align=0x40 nid=-1 from=0x0000000000000000 max_addr=0x0000000000000000 start_kernel+0xa4/0x568 [ 0.000000] memblock_reserve: [0x000000023f09a3c0-0x000000023f09a991] memblock_alloc_range_nid+0xc0/0x188 Signed-off-by: Faiyaz Mohammed <[email protected]> Signed-off-by: Mike Rapoport <[email protected]>
2020-11-17mm: Add 'mprotect' hook to struct vm_operations_structSean Christopherson1-0/+7
Background ========== 1. SGX enclave pages are populated with data by copying from normal memory via ioctl() (SGX_IOC_ENCLAVE_ADD_PAGES), which will be added later in this series. 2. It is desirable to be able to restrict those normal memory data sources. For instance, to ensure that the source data is executable before copying data to an executable enclave page. 3. Enclave page permissions are dynamic (just like normal permissions) and can be adjusted at runtime with mprotect(). This creates a problem because the original data source may have long since vanished at the time when enclave page permissions are established (mmap() or mprotect()). The solution (elsewhere in this series) is to force enclave creators to declare their paging permission *intent* up front to the ioctl(). This intent can be immediately compared to the source data’s mapping and rejected if necessary. The “intent” is also stashed off for later comparison with enclave PTEs. This ensures that any future mmap()/mprotect() operations performed by the enclave creator or done on behalf of the enclave can be compared with the earlier declared permissions. Problem ======= There is an existing mmap() hook which allows SGX to perform this permission comparison at mmap() time. However, there is no corresponding ->mprotect() hook. Solution ======== Add a vm_ops->mprotect() hook so that mprotect() operations which are inconsistent with any page's stashed intent can be rejected by the driver. Signed-off-by: Sean Christopherson <[email protected]> Co-developed-by: Jarkko Sakkinen <[email protected]> Signed-off-by: Jarkko Sakkinen <[email protected]> Signed-off-by: Borislav Petkov <[email protected]> Acked-by: Jethro Beekman <[email protected]> Acked-by: Dave Hansen <[email protected]> Acked-by: Mel Gorman <[email protected]> Acked-by: Hillf Danton <[email protected]> Cc: [email protected] Link: https://lkml.kernel.org/r/[email protected]
2020-11-17sched/deadline: Fix priority inheritance with multiple scheduling classesJuri Lelli1-1/+9
Glenn reported that "an application [he developed produces] a BUG in deadline.c when a SCHED_DEADLINE task contends with CFS tasks on nested PTHREAD_PRIO_INHERIT mutexes. I believe the bug is triggered when a CFS task that was boosted by a SCHED_DEADLINE task boosts another CFS task (nested priority inheritance). ------------[ cut here ]------------ kernel BUG at kernel/sched/deadline.c:1462! invalid opcode: 0000 [#1] PREEMPT SMP CPU: 12 PID: 19171 Comm: dl_boost_bug Tainted: ... Hardware name: ... RIP: 0010:enqueue_task_dl+0x335/0x910 Code: ... RSP: 0018:ffffc9000c2bbc68 EFLAGS: 00010002 RAX: 0000000000000009 RBX: ffff888c0af94c00 RCX: ffffffff81e12500 RDX: 000000000000002e RSI: ffff888c0af94c00 RDI: ffff888c10b22600 RBP: ffffc9000c2bbd08 R08: 0000000000000009 R09: 0000000000000078 R10: ffffffff81e12440 R11: ffffffff81e1236c R12: ffff888bc8932600 R13: ffff888c0af94eb8 R14: ffff888c10b22600 R15: ffff888bc8932600 FS: 00007fa58ac55700(0000) GS:ffff888c10b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa58b523230 CR3: 0000000bf44ab003 CR4: 00000000007606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Call Trace: ? intel_pstate_update_util_hwp+0x13/0x170 rt_mutex_setprio+0x1cc/0x4b0 task_blocks_on_rt_mutex+0x225/0x260 rt_spin_lock_slowlock_locked+0xab/0x2d0 rt_spin_lock_slowlock+0x50/0x80 hrtimer_grab_expiry_lock+0x20/0x30 hrtimer_cancel+0x13/0x30 do_nanosleep+0xa0/0x150 hrtimer_nanosleep+0xe1/0x230 ? __hrtimer_init_sleeper+0x60/0x60 __x64_sys_nanosleep+0x8d/0xa0 do_syscall_64+0x4a/0x100 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fa58b52330d ... ---[ end trace 0000000000000002 ]— He also provided a simple reproducer creating the situation below: So the execution order of locking steps are the following (N1 and N2 are non-deadline tasks. D1 is a deadline task. M1 and M2 are mutexes that are enabled * with priority inheritance.) Time moves forward as this timeline goes down: N1 N2 D1 | | | | | | Lock(M1) | | | | | | Lock(M2) | | | | | | Lock(M2) | | | | Lock(M1) | | (!!bug triggered!) | Daniel reported a similar situation as well, by just letting ksoftirqd run with DEADLINE (and eventually block on a mutex). Problem is that boosted entities (Priority Inheritance) use static DEADLINE parameters of the top priority waiter. However, there might be cases where top waiter could be a non-DEADLINE entity that is currently boosted by a DEADLINE entity from a different lock chain (i.e., nested priority chains involving entities of non-DEADLINE classes). In this case, top waiter static DEADLINE parameters could be null (initialized to 0 at fork()) and replenish_dl_entity() would hit a BUG(). Fix this by keeping track of the original donor and using its parameters when a task is boosted. Reported-by: Glenn Elliott <[email protected]> Reported-by: Daniel Bristot de Oliveira <[email protected]> Signed-off-by: Juri Lelli <[email protected]> Signed-off-by: Peter Zijlstra (Intel) <[email protected]> Tested-by: Daniel Bristot de Oliveira <[email protected]> Link: https://lkml.kernel.org/r/[email protected]
2020-11-17sched: Fix data-race in wakeupPeter Zijlstra1-1/+15
Mel reported that on some ARM64 platforms loadavg goes bananas and Will tracked it down to the following race: CPU0 CPU1 schedule() prev->sched_contributes_to_load = X; deactivate_task(prev); try_to_wake_up() if (p->on_rq &&) // false if (smp_load_acquire(&p->on_cpu) && // true ttwu_queue_wakelist()) p->sched_remote_wakeup = Y; smp_store_release(prev->on_cpu, 0); where both p->sched_contributes_to_load and p->sched_remote_wakeup are in the same word, and thus the stores X and Y race (and can clobber one another's data). Whereas prior to commit c6e7bd7afaeb ("sched/core: Optimize ttwu() spinning on p->on_cpu") the p->on_cpu handoff serialized access to p->sched_remote_wakeup (just as it still does with p->sched_contributes_to_load) that commit broke that by calling ttwu_queue_wakelist() with p->on_cpu != 0. However, due to p->XXX = X ttwu() schedule() if (p->on_rq && ...) // false smp_mb__after_spinlock() if (smp_load_acquire(&p->on_cpu) && deactivate_task() ttwu_queue_wakelist()) p->on_rq = 0; p->sched_remote_wakeup = Y; We can be sure any 'current' store is complete and 'current' is guaranteed asleep. Therefore we can move p->sched_remote_wakeup into the current flags word. Note: while the observed failure was loadavg accounting gone wrong due to ttwu() cobbering p->sched_contributes_to_load, the reverse problem is also possible where schedule() clobbers p->sched_remote_wakeup, this could result in enqueue_entity() wrecking ->vruntime and causing scheduling artifacts. Fixes: c6e7bd7afaeb ("sched/core: Optimize ttwu() spinning on p->on_cpu") Reported-by: Mel Gorman <[email protected]> Debugged-by: Will Deacon <[email protected]> Signed-off-by: Peter Zijlstra (Intel) <[email protected]> Link: https://lkml.kernel.org/r/[email protected]
2020-11-17hv_netvsc: Use vmbus_requestor to generate transaction IDs for VMBus hardeningAndres Beltran1-0/+1
Currently, pointers to guest memory are passed to Hyper-V as transaction IDs in netvsc. In the face of errors or malicious behavior in Hyper-V, netvsc should not expose or trust the transaction IDs returned by Hyper-V to be valid guest memory addresses. Instead, use small integers generated by vmbus_requestor as requests (transaction) IDs. Signed-off-by: Andres Beltran <[email protected]> Co-developed-by: Andrea Parri (Microsoft) <[email protected]> Signed-off-by: Andrea Parri (Microsoft) <[email protected]> Reviewed-by: Michael Kelley <[email protected]> Acked-by: Jakub Kicinski <[email protected]> Reviewed-by: Wei Liu <[email protected]> Cc: "David S. Miller" <[email protected]> Cc: Jakub Kicinski <[email protected]> Cc: [email protected] Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Wei Liu <[email protected]>
2020-11-17Drivers: hv: vmbus: Add vmbus_requestor data structure for VMBus hardeningAndres Beltran1-0/+22
Currently, VMbus drivers use pointers into guest memory as request IDs for interactions with Hyper-V. To be more robust in the face of errors or malicious behavior from a compromised Hyper-V, avoid exposing guest memory addresses to Hyper-V. Also avoid Hyper-V giving back a bad request ID that is then treated as the address of a guest data structure with no validation. Instead, encapsulate these memory addresses and provide small integers as request IDs. Signed-off-by: Andres Beltran <[email protected]> Co-developed-by: Andrea Parri (Microsoft) <[email protected]> Signed-off-by: Andrea Parri (Microsoft) <[email protected]> Reviewed-by: Michael Kelley <[email protected]> Reviewed-by: Wei Liu <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Wei Liu <[email protected]>
2020-11-16Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhostLinus Torvalds1-0/+1
Pull vhost fixes from Michael Tsirkin: "Fixes all over the place, most notably vhost scsi IO error fixes" * tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: vhost scsi: Add support for LUN resets. vhost scsi: add lun parser helper vhost scsi: fix cmd completion race vhost scsi: alloc cmds per vq instead of session vhost: add helper to check if a vq has been setup vdpasim: fix "mac_pton" undefined error swiotlb: using SIZE_MAX needs limits.h included
2020-11-16entry: Drop usage of TIF flags in the generic syscall codeGabriel Krisman Bertazi1-14/+12
Now that the flags migration in the common syscall entry code is complete and the code relies exclusively on thread_info::syscall_work, clean up the accesses to TI flags in that path. Signed-off-by: Gabriel Krisman Bertazi <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> Reviewed-by: Andy Lutomirski <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2020-11-16audit: Migrate to use SYSCALL_WORK flagGabriel Krisman Bertazi2-12/+8
On architectures using the generic syscall entry code the architecture independent syscall work is moved to flags in thread_info::syscall_work. This removes architecture dependencies and frees up TIF bits. Define SYSCALL_WORK_SYSCALL_AUDIT, use it in the generic entry code and convert the code which uses the TIF specific helper functions to use the new *_syscall_work() helpers which either resolve to the new mode for users of the generic entry code or to the TIF based functions for the other architectures. Signed-off-by: Gabriel Krisman Bertazi <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> Reviewed-by: Andy Lutomirski <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2020-11-16ptrace: Migrate TIF_SYSCALL_EMU to use SYSCALL_WORK flagGabriel Krisman Bertazi3-7/+5
On architectures using the generic syscall entry code the architecture independent syscall work is moved to flags in thread_info::syscall_work. This removes architecture dependencies and frees up TIF bits. Define SYSCALL_WORK_SYSCALL_EMU, use it in the generic entry code and convert the code which uses the TIF specific helper functions to use the new *_syscall_work() helpers which either resolve to the new mode for users of the generic entry code or to the TIF based functions for the other architectures. Signed-off-by: Gabriel Krisman Bertazi <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> Reviewed-by: Andy Lutomirski <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2020-11-16ptrace: Migrate to use SYSCALL_TRACE flagGabriel Krisman Bertazi3-12/+17
On architectures using the generic syscall entry code the architecture independent syscall work is moved to flags in thread_info::syscall_work. This removes architecture dependencies and frees up TIF bits. Define SYSCALL_WORK_SYSCALL_TRACE, use it in the generic entry code and convert the code which uses the TIF specific helper functions to use the new *_syscall_work() helpers which either resolve to the new mode for users of the generic entry code or to the TIF based functions for the other architectures. Signed-off-by: Gabriel Krisman Bertazi <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> Reviewed-by: Andy Lutomirski <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2020-11-16tracepoints: Migrate to use SYSCALL_WORK flagGabriel Krisman Bertazi2-8/+7
On architectures using the generic syscall entry code the architecture independent syscall work is moved to flags in thread_info::syscall_work. This removes architecture dependencies and frees up TIF bits. Define SYSCALL_WORK_SYSCALL_TRACEPOINT, use it in the generic entry code and convert the code which uses the TIF specific helper functions to use the new *_syscall_work() helpers which either resolve to the new mode for users of the generic entry code or to the TIF based functions for the other architectures. Signed-off-by: Gabriel Krisman Bertazi <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> Reviewed-by: Andy Lutomirski <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2020-11-16seccomp: Migrate to use SYSCALL_WORK flagGabriel Krisman Bertazi3-7/+9
On architectures using the generic syscall entry code the architecture independent syscall work is moved to flags in thread_info::syscall_work. This removes architecture dependencies and frees up TIF bits. Define SYSCALL_WORK_SECCOMP, use it in the generic entry code and convert the code which uses the TIF specific helper functions to use the new *_syscall_work() helpers which either resolve to the new mode for users of the generic entry code or to the TIF based functions for the other architectures. Signed-off-by: Gabriel Krisman Bertazi <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> Reviewed-by: Andy Lutomirski <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2020-11-16entry: Wire up syscall_work in common entry codeGabriel Krisman Bertazi1-0/+3
Prepare the common entry code to use the SYSCALL_WORK flags. They will be defined in subsequent patches for each type of syscall work. SYSCALL_WORK_ENTRY/EXIT are defined for the transition, as they will replace the TIF_ equivalent defines. Signed-off-by: Gabriel Krisman Bertazi <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> Reviewed-by: Andy Lutomirski <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2020-11-16entry: Expose helpers to migrate TIF to SYSCALL_WORK flagsGabriel Krisman Bertazi1-0/+32
With the goal to split the syscall work related flags into a separate field that is architecture independent, expose transitional helpers that resolve to either the TIF flags or to the corresponding SYSCALL_WORK flags. This will allow architectures to migrate only when they port to the generic syscall entry code. Signed-off-by: Gabriel Krisman Bertazi <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> Reviewed-by: Andy Lutomirski <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2020-11-16Merge branch 'x86/entry' into core/entryThomas Gleixner1-0/+10
Prepare for the merging of the syscall_work series which conflicts with the TIF bits overhaul in X86.
2020-11-16PM: runtime: Add pm_runtime_resume_and_get to deal with usage counterZhang Qilong1-0/+21
In many case, we need to check return value of pm_runtime_get_sync, but it brings a trouble to the usage counter processing. Many callers forget to decrease the usage counter when it failed, which could resulted in reference leak. It has been discussed a lot[0][1]. So we add a function to deal with the usage counter for better coding. [0]https://lkml.org/lkml/2020/6/14/88 [1]https://patchwork.ozlabs.org/project/linux-tegra/list/?series=178139 Signed-off-by: Zhang Qilong <[email protected]> Acked-by: Rafael J. Wysocki <[email protected]> Signed-off-by: Jakub Kicinski <[email protected]>
2020-11-16treewide: rename nla_strlcpy to nla_strscpy.Francis Laniel1-1/+1
Calls to nla_strlcpy are now replaced by calls to nla_strscpy which is the new name of this function. Signed-off-by: Francis Laniel <[email protected]> Reviewed-by: Kees Cook <[email protected]> Signed-off-by: Jakub Kicinski <[email protected]>
2020-11-16reset: make shared pulsed reset controls re-triggerableAmjad Ouled-Ameur1-0/+1
The current reset framework API does not allow to release what is done by reset_control_reset(), IOW decrement triggered_count. Add the new reset_control_rearm() call to do so. When reset_control_reset() has been called once, the counter triggered_count, in the reset framework, is incremented i.e the resource under the reset is in-use and the reset should not be done again. reset_control_rearm() would be the way to state that the resource is no longer used and, that from the caller's perspective, the reset can be fired again if necessary. Signed-off-by: Amjad Ouled-Ameur <[email protected]> Reported-by: Jerome Brunet <[email protected]> Signed-off-by: Philipp Zabel <[email protected]>
2020-11-16arch: pgtable: define MAX_POSSIBLE_PHYSMEM_BITS where neededArnd Bergmann1-0/+13
Stefan Agner reported a bug when using zsram on 32-bit Arm machines with RAM above the 4GB address boundary: Unable to handle kernel NULL pointer dereference at virtual address 00000000 pgd = a27bd01c [00000000] *pgd=236a0003, *pmd=1ffa64003 Internal error: Oops: 207 [#1] SMP ARM Modules linked in: mdio_bcm_unimac(+) brcmfmac cfg80211 brcmutil raspberrypi_hwmon hci_uart crc32_arm_ce bcm2711_thermal phy_generic genet CPU: 0 PID: 123 Comm: mkfs.ext4 Not tainted 5.9.6 #1 Hardware name: BCM2711 PC is at zs_map_object+0x94/0x338 LR is at zram_bvec_rw.constprop.0+0x330/0xa64 pc : [<c0602b38>] lr : [<c0bda6a0>] psr: 60000013 sp : e376bbe0 ip : 00000000 fp : c1e2921c r10: 00000002 r9 : c1dda730 r8 : 00000000 r7 : e8ff7a00 r6 : 00000000 r5 : 02f9ffa0 r4 : e3710000 r3 : 000fdffe r2 : c1e0ce80 r1 : ebf979a0 r0 : 00000000 Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 30c5383d Table: 235c2a80 DAC: fffffffd Process mkfs.ext4 (pid: 123, stack limit = 0x495a22e6) Stack: (0xe376bbe0 to 0xe376c000) As it turns out, zsram needs to know the maximum memory size, which is defined in MAX_PHYSMEM_BITS when CONFIG_SPARSEMEM is set, or in MAX_POSSIBLE_PHYSMEM_BITS on the x86 architecture. The same problem will be hit on all 32-bit architectures that have a physical address space larger than 4GB and happen to not enable sparsemem and include asm/sparsemem.h from asm/pgtable.h. After the initial discussion, I suggested just always defining MAX_POSSIBLE_PHYSMEM_BITS whenever CONFIG_PHYS_ADDR_T_64BIT is set, or provoking a build error otherwise. This addresses all configurations that can currently have this runtime bug, but leaves all other configurations unchanged. I looked up the possible number of bits in source code and datasheets, here is what I found: - on ARC, CONFIG_ARC_HAS_PAE40 controls whether 32 or 40 bits are used - on ARM, CONFIG_LPAE enables 40 bit addressing, without it we never support more than 32 bits, even though supersections in theory allow up to 40 bits as well. - on MIPS, some MIPS32r1 or later chips support 36 bits, and MIPS32r5 XPA supports up to 60 bits in theory, but 40 bits are more than anyone will ever ship - On PowerPC, there are three different implementations of 36 bit addressing, but 32-bit is used without CONFIG_PTE_64BIT - On RISC-V, the normal page table format can support 34 bit addressing. There is no highmem support on RISC-V, so anything above 2GB is unused, but it might be useful to eventually support CONFIG_ZRAM for high pages. Fixes: 61989a80fb3a ("staging: zsmalloc: zsmalloc memory allocation library") Fixes: 02390b87a945 ("mm/zsmalloc: Prepare to variable MAX_PHYSMEM_BITS") Acked-by: Thomas Bogendoerfer <[email protected]> Reviewed-by: Stefan Agner <[email protected]> Tested-by: Stefan Agner <[email protected]> Acked-by: Mike Rapoport <[email protected]> Link: https://lore.kernel.org/linux-mm/bdfa44bf1c570b05d6c70898e2bbb0acf234ecdf.1604762181.git.stefan@agner.ch/ Signed-off-by: Arnd Bergmann <[email protected]>
2020-11-16block: remove the update_bdev parameter to set_capacity_revalidate_and_notifyChristoph Hellwig1-2/+1
The update_bdev argument is always set to true, so remove it. Also rename the function to the slighly less verbose set_capacity_and_notify, as propagating the disk size to the block device isn't really revalidation. Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Hannes Reinecke <[email protected]> Reviewed-by: Petr Vorel <[email protected]> Signed-off-by: Jens Axboe <[email protected]>
2020-11-16Fonts: Add charcount field to font_descPeilin Ye1-0/+1
Subsystems are hard-coding the number of characters of our built-in fonts as 256. Include that information in our kernel font descriptor, `struct font_desc`. Signed-off-by: Peilin Ye <[email protected]> Reviewed-by: Daniel Vetter <[email protected]> Reviewed-by: Greg Kroah-Hartman <[email protected]> Signed-off-by: Daniel Vetter <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/65952296d1d9486093bd955d1536f7dcd11112c6.1605169912.git.yepeilin.cs@gmail.com
2020-11-16console: Delete unused con_font_copy() callback implementationsPeilin Ye1-1/+0
Recently in commit 3c4e0dff2095 ("vt: Disable KD_FONT_OP_COPY") we disabled the KD_FONT_OP_COPY ioctl() option. Delete all the con_font_copy() callbacks, since we no longer use them. Mark KD_FONT_OP_COPY as "obsolete" in include/uapi/linux/kd.h, just like what we have done for PPPIOCDETACH in commit af8d3c7c001a ("ppp: remove the PPPIOCDETACH ioctl"). Signed-off-by: Peilin Ye <[email protected]> Reviewed-by: Greg Kroah-Hartman <[email protected]> Signed-off-by: Daniel Vetter <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/c8d28007edf50de4387e1532eb3eb736db716f73.1605169912.git.yepeilin.cs@gmail.com
2020-11-16block: switch gendisk lookup to a simple xarrayChristoph Hellwig1-7/+0
Now that bdev_map is only used for finding gendisks, we can use a simple xarray instead of the regions tracking structure for it. Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Hannes Reinecke <[email protected]> Reviewed-by: Greg Kroah-Hartman <[email protected]> Signed-off-by: Jens Axboe <[email protected]>
2020-11-16ide: remove ide_{,un}register_regionChristoph Hellwig1-3/+0
There is no need to ever register the fake gendisk used for ide-tape. Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Hannes Reinecke <[email protected]> Signed-off-by: Jens Axboe <[email protected]>
2020-11-16block: add an optional probe callback to major_namesChristoph Hellwig1-1/+4
Add a callback to the major_names array that allows a driver to override how to probe for dev_t that doesn't currently have a gendisk registered. This will help separating the lookup of the gendisk by dev_t vs probe action for a not currently registered dev_t. Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Hannes Reinecke <[email protected]> Signed-off-by: Jens Axboe <[email protected]>
2020-11-16block: remove __blkdev_driver_ioctlChristoph Hellwig1-2/+0
Just open code it in the few callers. Signed-off-by: Christoph Hellwig <[email protected]> Signed-off-by: Jens Axboe <[email protected]>
2020-11-16block: remove set_device_roChristoph Hellwig1-1/+0
Fold set_device_ro into its only remaining caller. Signed-off-by: Christoph Hellwig <[email protected]> Signed-off-by: Jens Axboe <[email protected]>
2020-11-16block: add a new set_read_only methodChristoph Hellwig1-0/+1
Add a new method to allow for driver-specific processing when setting or clearing the block device read-only state. This allows to replace the cumbersome and error-prone override of the whole ioctl implementation. Signed-off-by: Christoph Hellwig <[email protected]> Signed-off-by: Jens Axboe <[email protected]>
2020-11-16hrtimer: Fix kernel-doc markupsMauro Carvalho Chehab1-1/+5
The hrtimer_get_remaining() markup is documenting, instead, __hrtimer_get_remaining(), as it is placed at the C file. In order to properly document it, a kernel-doc markup is needed together with the function prototype. So, add a new one, while preserving the existing one, just fixing the function name. The hrtimer_is_queued prototype has a typo: it is using '=' instead of '-' to split: identifier - description as required by kernel-doc markup. Signed-off-by: Mauro Carvalho Chehab <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> Link: https://lore.kernel.org/r/9dc87808c2fd07b7e050bafcd033c5ef05808fea.1605521731.git.mchehab+huawei@kernel.org
2020-11-16timers: Make run_local_timers() staticThomas Gleixner1-1/+0
No users outside of the timer code. Move the caller below this function to avoid a pointless forward declaration. Signed-off-by: Thomas Gleixner <[email protected]>
2020-11-16Merge back cpufreq updates for v5.11.Rafael J. Wysocki1-5/+0
2020-11-16gpiolib: Replace unsigned by unsigned intAndy Shevchenko1-2/+2
Replace unsigned by unsigned int in GPIO library code. Note, legacy API left untouched. Signed-off-by: Andy Shevchenko <[email protected]> Acked-by: Linus Walleij <[email protected]> Reviewed-by: Hans de Goede <[email protected]> Reviewed-by: Mika Westerberg <[email protected]>
2020-11-16misc: rtsx: Add hardware auto power off for RTS5261Rui Feng1-0/+3
This patch enable hardware auto power off when card is removed. Signed-off-by: Rui Feng <[email protected]> Acked-by: Greg Kroah-Hartman <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Ulf Hansson <[email protected]>
2020-11-16mmc: rtsx: Add test mode for RTS5261Rui Feng1-0/+4
This patch add test mode for RTS5261. If test mode is set, reader will switch to SD Express mode mandatorily, and this mode is used by factory testing only. Signed-off-by: Rui Feng <[email protected]> Acked-by: Greg Kroah-Hartman <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Ulf Hansson <[email protected]>
2020-11-16misc: rtsx: Add SD Express mode support for RTS5261Rui Feng1-0/+23
RTS5261 support SD mode and PCIe/NVMe mode. The workflow is as follows. 1.RTS5261 work in SD mode and set MMC_CAPS2_SD_EXP flag. 2.If card is plugged in, Host send CMD8 to ask card's PCIe availability. 3.If the card has PCIe availability and WP is not set, init_sd_express() will be invoked, RTS5261 switch to PCIe/NVMe mode. 4.Mmc driver handover it to NVMe driver. 5.If card is unplugged, RTS5261 will switch to SD mode. Signed-off-by: Rui Feng <[email protected]> Acked-by: Greg Kroah-Hartman <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Ulf Hansson <[email protected]>
2020-11-16mmc: core: Initial support for SD express card/hostUlf Hansson1-0/+7
In the SD specification v7.10 the SD express card has been added. This new type of removable SD card, can be managed via a PCIe/NVMe based interface, while also allowing backwards compatibility towards the legacy SD interface. To keep the backwards compatibility, it's required to start the initialization through the legacy SD interface. If it turns out that the mmc host and the SD card, both supports the PCIe/NVMe interface, then a switch should be allowed. Therefore, let's introduce some basic support for this type of SD cards to the mmc core. The mmc host, should set MMC_CAP2_SD_EXP if it supports this interface and MMC_CAP2_SD_EXP_1_2V, if also 1.2V is supported, as to inform the core about it. To deal with the switch to the PCIe/NVMe interface, the mmc host is required to implement a new host ops, ->init_sd_express(). Based on the initial communication between the host and the card, host->ios.timing is set to either MMC_TIMING_SD_EXP or MMC_TIMING_SD_EXP_1_2V, depending on if 1.2V is supported or not. In this way, the mmc host can check these values in its ->init_sd_express() ops, to know how to proceed with the handover. Note that, to manage card insert/removal, the mmc core sticks with using the ->get_cd() callback, which means it's the host's responsibility to make sure it provides valid data, even if the card may be managed by PCIe/NVMe at the moment. As long as the card seems to be present, the mmc core keeps the card powered on. Cc: Greg Kroah-Hartman <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: Christoph Hellwig <[email protected]> Cc: Rui Feng <[email protected]> Signed-off-by: Ulf Hansson <[email protected]> Reviewed-by: Greg Kroah-Hartman <[email protected]> Link: https://lore.kernel.org/r/[email protected]
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