linux/drivers/char/ipmi, branch v5.14

Merge branch 'akpm' (patches from Andrew)

2021-07-02T19:08:10Z

Merge more updates from Andrew Morton: "190 patches. Subsystems affected by this patch series: mm (hugetlb, userfaultfd, vmscan, kconfig, proc, z3fold, zbud, ras, mempolicy, memblock, migration, thp, nommu, kconfig, madvise, memory-hotplug, zswap, zsmalloc, zram, cleanups, kfence, and hmm), procfs, sysctl, misc, core-kernel, lib, lz4, checkpatch, init, kprobes, nilfs2, hfs, signals, exec, kcov, selftests, compress/decompress, and ipc" * emailed patches from Andrew Morton : (190 commits) ipc/util.c: use binary search for max_idx ipc/sem.c: use READ_ONCE()/WRITE_ONCE() for use_global_lock ipc: use kmalloc for msg_queue and shmid_kernel ipc sem: use kvmalloc for sem_undo allocation lib/decompressors: remove set but not used variabled 'level' selftests/vm/pkeys: exercise x86 XSAVE init state selftests/vm/pkeys: refill shadow register after implicit kernel write selftests/vm/pkeys: handle negative sys_pkey_alloc() return code selftests/vm/pkeys: fix alloc_random_pkey() to make it really, really random kcov: add __no_sanitize_coverage to fix noinstr for all architectures exec: remove checks in __register_bimfmt() x86: signal: don't do sas_ss_reset() until we are certain that sigframe won't be abandoned hfsplus: report create_date to kstat.btime hfsplus: remove unnecessary oom message nilfs2: remove redundant continue statement in a while-loop kprobes: remove duplicated strong free_insn_page in x86 and s390 init: print out unknown kernel parameters checkpatch: do not complain about positive return values starting with EPOLL checkpatch: improve the indented label test checkpatch: scripts/spdxcheck.py now requires python3 ...

kernel.h: split out panic and oops helpers

2021-07-01T18:06:04Z

kernel.h is being used as a dump for all kinds of stuff for a long time. Here is the attempt to start cleaning it up by splitting out panic and oops helpers. There are several purposes of doing this: - dropping dependency in bug.h - dropping a loop by moving out panic_notifier.h - unload kernel.h from something which has its own domain At the same time convert users tree-wide to use new headers, although for the time being include new header back to kernel.h to avoid twisted indirected includes for existing users. [akpm@linux-foundation.org: thread_info.h needs limits.h] [andriy.shevchenko@linux.intel.com: ia64 fix] Link: https://lkml.kernel.org/r/20210520130557.55277-1-andriy.shevchenko@linux.intel.com Link: https://lkml.kernel.org/r/20210511074137.33666-1-andriy.shevchenko@linux.intel.com Signed-off-by: Andy Shevchenko Reviewed-by: Bjorn Andersson Co-developed-by: Andrew Morton Acked-by: Mike Rapoport Acked-by: Corey Minyard Acked-by: Christian Brauner Acked-by: Arnd Bergmann Acked-by: Kees Cook Acked-by: Wei Liu Acked-by: Rasmus Villemoes Signed-off-by: Andrew Morton Acked-by: Sebastian Reichel Acked-by: Luis Chamberlain Acked-by: Stephen Boyd Acked-by: Thomas Bogendoerfer Acked-by: Helge Deller # parisc Signed-off-by: Linus Torvalds

ipmi: kcs_bmc_aspeed: Fix less than zero comparison of a unsigned int

2021-06-22T00:50:36Z

The comparisons of the unsigned int hw_type to less than zero always false because it is unsigned. Fix this by using an int for the assignment and less than zero check. Addresses-Coverity: ("Unsigned compared against 0") Fixes: 9d2df9a0ad80 ("ipmi: kcs_bmc_aspeed: Implement KCS SerIRQ configuration") Signed-off-by: Colin Ian King Message-Id: <20210616162913.15259-1-colin.king@canonical.com> Signed-off-by: Corey Minyard

ipmi: kcs_bmc_aspeed: Optionally apply status address

2021-06-22T00:50:35Z

Some Aspeed KCS devices can derive the status register address from the address of the data register. As such, the address of the status register can be implicit in the configuration if desired. On the other hand, sometimes address schemes might be requested that are incompatible with the default addressing scheme. Allow these requests where possible if the devicetree specifies the status register address. Signed-off-by: Andrew Jeffery Reviewed-by: Chia-Wei Wang Message-Id: <20210608104757.582199-17-andrew@aj.id.au> Signed-off-by: Corey Minyard

ipmi: kcs_bmc_aspeed: Fix IBFIE typo from datasheet

2021-06-22T00:50:35Z

Input Buffer Full Interrupt Enable (IBFIE) is typoed as IBFIF for some registers in the datasheet. Fix the driver to use the sensible acronym. Signed-off-by: Andrew Jeffery Reviewed-by: Zev Weiss Message-Id: <20210608104757.582199-16-andrew@aj.id.au> Signed-off-by: Corey Minyard

ipmi: kcs_bmc_aspeed: Implement KCS SerIRQ configuration

2021-06-22T00:50:34Z

Apply the SerIRQ ID and level/sense behaviours from the devicetree if provided. Signed-off-by: Andrew Jeffery Message-Id: <20210608104757.582199-15-andrew@aj.id.au> Signed-off-by: Corey Minyard

ipmi: kcs_bmc: Add serio adaptor

2021-06-22T00:50:28Z

kcs_bmc_serio acts as a bridge between the KCS drivers in the IPMI subsystem and the existing userspace interfaces available through the serio subsystem. This is useful when userspace would like to make use of the BMC KCS devices for purposes that aren't IPMI. Signed-off-by: Andrew Jeffery Message-Id: <20210608104757.582199-12-andrew@aj.id.au> Reviewed-by: Zev Weiss Signed-off-by: Corey Minyard

ipmi: kcs_bmc: Enable IBF on open

2021-06-22T00:50:28Z

This way devices don't get delivered IRQs when no-one is interested. Signed-off-by: Andrew Jeffery Message-Id: <20210608104757.582199-11-andrew@aj.id.au> Signed-off-by: Corey Minyard

ipmi: kcs_bmc: Allow clients to control KCS IRQ state

2021-06-22T00:50:28Z

Add a mechanism for controlling whether the client associated with a KCS device will receive Input Buffer Full (IBF) and Output Buffer Empty (OBE) events. This enables an abstract implementation of poll() for KCS devices. A wart in the implementation is that the ASPEED KCS devices don't support an OBE interrupt for the BMC. Instead we pretend it has one by polling the status register waiting for the Output Buffer Full (OBF) bit to clear, and generating an event when OBE is observed. Cc: CS20 KWLiu Signed-off-by: Andrew Jeffery Reviewed-by: Zev Weiss Message-Id: <20210608104757.582199-10-andrew@aj.id.au> Signed-off-by: Corey Minyard

ipmi: kcs_bmc: Decouple the IPMI chardev from the core

2021-06-22T00:50:22Z

Now that we have untangled the data-structures, split the userspace interface out into its own module. Userspace interfaces and drivers are registered to the KCS BMC core to support arbitrary binding of either. Signed-off-by: Andrew Jeffery Message-Id: <20210608104757.582199-9-andrew@aj.id.au> Reviewed-by: Zev Weiss Signed-off-by: Corey Minyard