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* Merge branch 'for-linus' of ↵Linus Torvalds2017-02-22103-1083/+1253
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux Pull s390 updates from Martin Schwidefsky: - New entropy generation for the pseudo random number generator. - Early boot printk output via sclp to help debug crashes on boot. This needs to be enabled with a kernel parameter. - Add proper no-execute support with a bit in the page table entry. - Bug fixes and cleanups. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (65 commits) s390/syscall: fix single stepped system calls s390/zcrypt: make ap_bus explicitly non-modular s390/zcrypt: Removed unneeded debug feature directory creation. s390: add missing "do {} while (0)" loop constructs to multiline macros s390/mm: add cond_resched call to kernel page table dumper s390: get rid of MACHINE_HAS_PFMF and MACHINE_HAS_HPAGE s390/mm: make memory_block_size_bytes available for !MEMORY_HOTPLUG s390: replace ACCESS_ONCE with READ_ONCE s390: Audit and remove any remaining unnecessary uses of module.h s390: mm: Audit and remove any unnecessary uses of module.h s390: kernel: Audit and remove any unnecessary uses of module.h s390/kdump: Use "LINUX" ELF note name instead of "CORE" s390: add no-execute support s390: report new vector facilities s390: use correct input data address for setup_randomness s390/sclp: get rid of common response code handling s390/sclp: don't add new lines to each printed string s390/sclp: make early sclp code readable s390/sclp: disable early sclp code as soon as the base sclp driver is active s390/sclp: move early printk code to drivers ...
| * s390/syscall: fix single stepped system callsMartin Schwidefsky2017-02-201-0/+1
| | | | | | | | | | | | | | | | Fix PER tracing of system calls after git commit 34525e1f7e8dc478 "s390: store breaking event address only for program checks" broke it. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390/zcrypt: make ap_bus explicitly non-modularPaul Gortmaker2017-02-201-51/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The Makefile in drivers/s390 has: obj-y += cio/ block/ char/ crypto/ net/ scsi/ virtio/ and the Makefile in crypto/ has: ap-objs := ap_bus.o ap_card.o ap_queue.o meaning that it currently is not being built as a module by anyone. Lets remove the modular code that is essentially orphaned, so that when reading the driver there is no doubt it is builtin-only. Since module_init translates to device_initcall in the non-modular case, the init ordering remains unchanged with this commit. Also note that MODULE_ALIAS is a no-op for non-module builds. We also delete the MODULE_LICENSE tag etc. since all that information is already contained at the top of the file in the comments. We replace module.h with moduleparam.h since the file does declare some module parameters even though it is not modular itself. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390/zcrypt: Removed unneeded debug feature directory creation.Harald Freudenberger2017-02-202-6/+0
| | | | | | | | | | | | | | | | | | The ap bus code and the zcrypt api had invocations to the debug feature debugfs_create_dir() call but never populated these directories in any way. Removed this unneeded code. Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390: add missing "do {} while (0)" loop constructs to multiline macrosHeiko Carstens2017-02-173-8/+8
| | | | | | | | | | Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390/mm: add cond_resched call to kernel page table dumperHeiko Carstens2017-02-171-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | Walking kernel page tables within the kernel page table dumper may potentially take a lot of time. This may lead to soft lockup warning messages. To avoid this add a cond_resched call for each pgd_level iteration. This is the same as "x86/mm/ptdump: Fix soft lockup in page table walker" for x86. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390: get rid of MACHINE_HAS_PFMF and MACHINE_HAS_HPAGEHeiko Carstens2017-02-174-6/+3
| | | | | | | | | | | | | | | | Both MACHINE_HAS_PFMF and MACHINE_HAS_HPAGE are just an alias for MACHINE_HAS_EDAT1. So simply use MACHINE_HAS_EDAT1 instead. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390/mm: make memory_block_size_bytes available for !MEMORY_HOTPLUGHeiko Carstens2017-02-171-9/+9
| | | | | | | | | | | | | | | | | | Fix this compile error for !MEMORY_HOTPLUG && NUMA: arch/s390/built-in.o: In function `emu_setup_size_adjust': arch/s390/numa/mode_emu.c:477: undefined reference to `memory_block_size_bytes' Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390: replace ACCESS_ONCE with READ_ONCEChristian Borntraeger2017-02-173-9/+9
| | | | | | | | | | | | | | | | Remove the last places of ACCESS_ONCE in s390 code. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390: Audit and remove any remaining unnecessary uses of module.hPaul Gortmaker2017-02-176-5/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Historically a lot of these existed because we did not have a distinction between what was modular code and what was providing support to modules via EXPORT_SYMBOL and friends. That changed when we forked out support for the latter into the export.h file. This means we should be able to reduce the usage of module.h in code that is obj-y Makefile or bool Kconfig. The advantage in doing so is that module.h itself sources about 15 other headers; adding significantly to what we feed cpp, and it can obscure what headers we are effectively using. Since module.h was the source for init.h (for __init) and for export.h (for EXPORT_SYMBOL) we consider each change instance for the presence of either and replace as needed. An instance where module_param was used without moduleparam.h was also fixed, as well as implicit use of ptrace.h and string.h headers. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390: mm: Audit and remove any unnecessary uses of module.hPaul Gortmaker2017-02-177-6/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Historically a lot of these existed because we did not have a distinction between what was modular code and what was providing support to modules via EXPORT_SYMBOL and friends. That changed when we forked out support for the latter into the export.h file. This means we should be able to reduce the usage of module.h in code that is obj-y Makefile or bool Kconfig. The advantage in doing so is that module.h itself sources about 15 other headers; adding significantly to what we feed cpp, and it can obscure what headers we are effectively using. Since module.h was the source for init.h (for __init) and for export.h (for EXPORT_SYMBOL) we consider each change instance for the presence of either and replace as needed. An instance where module_param was used without moduleparam.h was also fixed, as well as an implict use of asm/elf.h header. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390: kernel: Audit and remove any unnecessary uses of module.hPaul Gortmaker2017-02-1717-18/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Historically a lot of these existed because we did not have a distinction between what was modular code and what was providing support to modules via EXPORT_SYMBOL and friends. That changed when we forked out support for the latter into the export.h file. This means we should be able to reduce the usage of module.h in code that is obj-y Makefile or bool Kconfig. The advantage in doing so is that module.h itself sources about 15 other headers; adding significantly to what we feed cpp, and it can obscure what headers we are effectively using. Since module.h was the source for init.h (for __init) and for export.h (for EXPORT_SYMBOL) we consider each change instance for the presence of either and replace as needed. Build testing revealed some implicit header usage that was fixed up accordingly. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390/kdump: Use "LINUX" ELF note name instead of "CORE"Michael Holzheu2017-02-171-1/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In binutils/libbfd (bfd/elf.c) it is enforced that all s390 specific ELF notes like e.g. NT_S390_PREFIX or NT_S390_CTRS have "LINUX" specified as note name. Otherwise the notes are ignored. For /proc/vmcore we currently use "CORE" for these notes. Up to now this has not been a real problem because the dump analysis tool "crash" does not check the note name. But it will break all programs that use libbfd for processing ELF notes. So fix this and use "LINUX" for all s390 specific notes to comply with libbfd. Cc: stable@vger.kernel.org # v4.4+ Reported-by: Philipp Rudo <prudo@linux.vnet.ibm.com> Reviewed-by: Philipp Rudo <prudo@linux.vnet.ibm.com> Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390: add no-execute supportMartin Schwidefsky2017-02-0815-132/+277
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Bit 0x100 of a page table, segment table of region table entry can be used to disallow code execution for the virtual addresses associated with the entry. There is one tricky bit, the system call to return from a signal is part of the signal frame written to the user stack. With a non-executable stack this would stop working. To avoid breaking things the protection fault handler checks the opcode that caused the fault for 0x0a77 (sys_sigreturn) and 0x0aad (sys_rt_sigreturn) and injects a system call. This is preferable to the alternative solution with a stub function in the vdso because it works for vdso=off and statically linked binaries as well. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390: report new vector facilitiesMartin Schwidefsky2017-02-083-2/+10
| | | | | | | | | | | | | | | | Add hardware capability bits and feature tags to /proc/cpuinfo for the "Vector Packed Decimal Facility" (tag "vxd" / hwcap bit 2^12) and the "Vector Enhancements Facility 1" (tag "vxe" / hwcap bit 2^13). Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390: use correct input data address for setup_randomnessHeiko Carstens2017-02-081-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The current implementation of setup_randomness uses the stack address and therefore the pointer to the SYSIB 3.2.2 block as input data address. Furthermore the length of the input data is the number of virtual-machine description blocks which is typically one. This means that typically a single zero byte is fed to add_device_randomness. Fix both of these and use the address of the first virtual machine description block as input data address and also use the correct length. Fixes: bcfcbb6bae64 ("s390: add system information as device randomness") Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390/sclp: get rid of common response code handlingHeiko Carstens2017-02-083-33/+17
| | | | | | | | | | | | | | | | | | | | Get rid of common response code handling. Each command requires its own response code handling anyway. Also the retry in case of -EBUSY does not work and can be simply removed. Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390/sclp: don't add new lines to each printed stringHeiko Carstens2017-02-083-12/+13
| | | | | | | | | | | | | | | | | | | | | | | | The early vt220 sclp printk code added an extra new line to each printed multi-line text. If used for the early sclp console this will lead to numerous extra new lines. Therefore get rid of this semantic and require that each to be printed string contains a line feed character if a new line is wanted. Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390/sclp: make early sclp code readableHeiko Carstens2017-02-0810-295/+244
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch - unifies the old sclp early code and the sclp early printk code, so they can use common functions - makes sure all sclp early functions and variables have the same "sclp_early" prefix - converts the sclp early printk code into readable code by using existing data structures instead of hard coded magic arrays - splits the early sclp code into two files: sclp_early.c and sclp_early_core.c. The core file contains everything that is required by the kernel decompressor and may not call functions not contained within the core file. Otherwise the result would be a link error. - changes interrupt handling to be completely synchronous. The old early sclp code had a small window which allowed to receive several interrupts instead of exactly the single expected interrupt. This did hide a subtle potential bug, which is fixed with this large rework. - contains a couple of small cleanups. Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390/sclp: disable early sclp code as soon as the base sclp driver is activeHeiko Carstens2017-02-083-7/+11
| | | | | | | | | | | | | | | | | | | | Make sure the early sclp code does not generate any sclp requests anymore as soon as the base sclp driver is active. Otherwise both drivers may see unexpected requests or may miss expected interrupts. Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390/sclp: move early printk code to driversHeiko Carstens2017-02-084-10/+19
| | | | | | | | | | | | | | | | | | | | Move the early sclp printk code to the drivers folder where also the rest of the sclp code can be found. This way it is possible to use the sclp private header files for further cleanups. Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390/debug: make debug event time stamps relative to the boot TOD clockMartin Schwidefsky2017-02-073-16/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The debug features currently uses absolute TOD time stamps for the debug events. Given that the TOD clock can jump forward and backward due to STP sync checks the order of debug events can get obfuscated. Replace the absolute TOD time stamps with a delta to the IPL time stamp. On a STP sync check the TOD clock correction is added to the IPL time stamp as well to make the deltas unaffected by STP sync check. The readout of the debug feature entries will convert the deltas back to absolute time stamps based on the Unix epoch. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390/topology: correct allocation of topology informationMartin Schwidefsky2017-02-071-1/+1
| | | | | | | | | | | | | | | | | | | | The data stored by the STSI instruction can be up to a page in size but the memblock_virt_alloc allocation for tl_info only specifies 16 bytes. The memory after the short allocation is overwritten every time arch_update_cpu_topology is called. Fixes: 8c9105802235 "s390/numa: establish cpu to node mapping early" Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390: make setup_randomness workHeiko Carstens2017-02-071-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit bcfcbb6bae64 ("s390: add system information as device randomness") intended to add some virtual machine specific information to the randomness pool. Unfortunately it uses the page allocator before it is ready to use. In result the page allocator always returns NULL and the setup_randomness function never adds anything to the randomness pool. To fix this use memblock_alloc and memblock_free instead. Fixes: bcfcbb6bae64 ("s390: add system information as device randomness") Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390/qdio: improve some debug printsJulian Wiedmann2017-02-031-2/+3
| | | | | | | | | | | | | | | | With multiple input queues, these DBFs turned out to be not very helpful... Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390/qdio: fix up tiqdio_thinint_handler() kerneldocJulian Wiedmann2017-02-031-2/+1
| | | | | | | | | | | | | | | | | | Missed in commit f4eae94f7137 ("s390/airq: simplify adapter interrupt code") Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Reviewed-by: Steffen Maier <maier@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390/qdio: clean up q->irq_ptr usageJulian Wiedmann2017-02-031-4/+4
| | | | | | | | | | | | | | | | | | | | | | In tiqdio_call_inq_handlers(), we're looping over all input queues on the *same* irq. So instead of using the queues' back pointer, we can just access the irq directly. No functional change. Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390/qdio: clear DSCI prior to scanning multiple input queuesJulian Wiedmann2017-02-031-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For devices with multiple input queues, tiqdio_call_inq_handlers() iterates over all input queues and clears the device's DSCI during each iteration. If the DSCI is re-armed during one of the later iterations, we therefore do not scan the previous queues again. The re-arming also raises a new adapter interrupt. But its handler does not trigger a rescan for the device, as the DSCI has already been erroneously cleared. This can result in queue stalls on devices with multiple input queues. Fix it by clearing the DSCI just once, prior to scanning the queues. As the code is moved in front of the loop, we also need to access the DSCI directly (ie irq->dsci) instead of going via each queue's parent pointer to the same irq. This is not a functional change, and a follow-up patch will clean up the other users. In practice, this bug only affects CQ-enabled HiperSockets devices, ie. devices with sysfs-attribute "hsuid" set. Setting a hsuid is needed for AF_IUCV socket applications that use HiperSockets communication. Fixes: 104ea556ee7f ("qdio: support asynchronous delivery of storage blocks") Cc: <stable@vger.kernel.org> # v3.2+ Reviewed-by: Ursula Braun <ubraun@linux.vnet.ibm.com> Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390/dcssblk: fix device size calculation in dcssblk_direct_access()Gerald Schaefer2017-02-031-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Since commit dd22f551 "block: Change direct_access calling convention", the device size calculation in dcssblk_direct_access() is off-by-one. This results in bdev_direct_access() always returning -ENXIO because the returned value is not page aligned. Fix this by adding 1 to the dev_sz calculation. Fixes: dd22f551 ("block: Change direct_access calling convention") Cc: <stable@vger.kernel.org> # 4.0+ Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390/dasd: correct inconsistent indentingStefan Haberland2017-01-311-2/+2
| | | | | | | | | | Signed-off-by: Stefan Haberland <sth@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390/dasd: check blockdevice pointer before trying to sync blockdeviceStefan Haberland2017-01-311-4/+5
| | | | | | | | | | | | | | | | | | | | | | | | If safe offline is called for a DASD alias device a null pointer is passed to fsync_bdev. So check for existence of the blockdevice before calling fsync_bdev. Should not be a real world problem since safe offline for an alias device does not make sense and fsync_bdev can deal with a NULL pointer which it gets after successful NULL pointer dereferencing on s390. Signed-off-by: Stefan Haberland <sth@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390/dasd: check for device error pointer within state change interruptsStefan Haberland2017-01-311-2/+5
| | | | | | | | | | | | | | | | Check if the device pointer is valid. Just a sanity check since we already are in the int handler of the device. Signed-off-by: Stefan Haberland <sth@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390/dasd: allow 0 for path_threshold attributeStefan Haberland2017-01-311-4/+2
| | | | | | | | | | | | | | | | Allow 0 as valid input for the path_threshold attribute to deactivate the IFCC/CCC error handling. Signed-off-by: Stefan Haberland <sth@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390: store breaking event address only for program checksMartin Schwidefsky2017-01-311-38/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | The principles of operations specifies that the breaking event address is stored to the address 0x110 in the prefix page only for program checks. The last branch in user space is lost as soon as a branch in kernel space is executed after e.g. an svc. This makes it impossible to accurately maintain the breaking event address for a user space process. Simplify the code, just copy the current breaking event address from 0x110 to the task structure for program checks from user space. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390/dasd: Improve parameter list parsingJan Höppner2017-01-312-135/+125
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The function dasd_busid() still uses simple_strtoul() to convert a string to an integer value. This function is obsolete for quite some time already and should be replaced. The whole parameter parsing semantic still relies somewhat on the fact, that simple_strtoul() parses a string containing literals without complains and just returns the parsed integer value plus the residual string. kstrtoint(), however, would return -EINVAL in such a case. Since we want to get rid of simple_strtoul() and now have a nice dasd[] containing only single elements, we can clean up and simplify a few things. Replace simple_strtoul() with kstrtouint(), improve and simplify the overall parameter parsing by the following: - instead of residual strings return proper error codes - remove dasd_parse_next_element() and decide directly what sort of element is being parsed - if we parse a device or a range of devices, split that element into separate bits with a new function - remove warning about invalid ending as it doesn't apply anymore - annotate all parsing functions and data that can be freed after initialisation with __init and __initdata respectively - clean up bits and pieces while at it Reviewed-by: Stefan Haberland <sth@linux.vnet.ibm.com> Reviewed-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Jan Höppner <hoeppner@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390/dasd: Always store parameter elements in an arrayJan Höppner2017-01-311-16/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When the DASD driver is built into the kernel, the entire comma separated parameter list is stored as one single element in the dasd[] array, opposed to the module build where each element is stored separately in dasd[]. There is no point in doing so. Therefore, store each part of the list as single elements in dasd[] as well when built into the kernel. Also, create a define for the maximum of 256 parameters. Reviewed-by: Stefan Haberland <sth@linux.vnet.ibm.com> Reviewed-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Jan Höppner <hoeppner@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390/zcrypt: use spin_lock_bh for all queue locks and unlocks.Harald Freudenberger2017-01-311-0/+8
| | | | | | | | | | | | | | | | | | During tests the Kernel complained about inconsistend lock state: inconsistent {IN-SOFTIRQ-W} -> {SOFTIRQ-ON-W} usage. Now all the queue locks use spin_lock_bh/spin_unlock_bh. Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390/prng: Adjust generation of entropy to produce real 256 bits.Harald Freudenberger2017-01-311-16/+24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The generate_entropy function used a sha256 for compacting together 256 bits of entropy into 32 bytes hash. However, it is questionable if a sha256 can really be used here, as potential collisions may reduce the max entropy fitting into a 32 byte hash value. So this batch introduces the use of sha512 instead and the required buffer adjustments for the calling functions. Further more the working buffer for the generate_entropy function has been widened from one page to two pages. So now 1024 stckf invocations are used to gather 256 bits of entropy. This has been done to be on the save side if the jitters of stckf values isn't as good as supposed. Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390/crypto: Extend key length check for AES-XTS in fips mode.Harald Freudenberger2017-01-311-0/+7
| | | | | | | | | | | | | | | | | | In fips mode only xts keys with 128 bit or 125 bit are allowed. This fix extends the xts_aes_set_key function to check for these valid key lengths in fips mode. Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390/crypto: Check des3_ede keys for uniqueness in fips modeMatthew Rosato2017-01-311-0/+14
| | | | | | | | | | | | | | | | | | | | Triple-DES implementations will soon be required to check for uniqueness of keys with fips mode enabled. Add checks to ensure none of the 3 keys match. Signed-off-by: Matthew Rosato <mjrosato@linux.vnet.ibm.com> Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390/bpf: remove redundant check for non-null imageDaniel Borkmann2017-01-161-7/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | After we already allocated the jit.prg_buf image via bpf_jit_binary_alloc() and filled it out with instructions, jit.prg_buf cannot be NULL anymore. Thus, remove the unnecessary check. Tested on s390x with test_bpf module. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Cc: Michael Holzheu <holzheu@linux.vnet.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390/cio: remove cmf related code relevant for 31 bit onlySebastian Ott2017-01-161-8/+2
| | | | | | | | | | | | | | | | | | | | This is a leftover from the 31 bit era to avoid 64 bit divisions. Get rid of it. Reported-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390: provide sclp based boot consoleHeiko Carstens2017-01-166-11/+61
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use the early sclp code to provide a boot console. This boot console is available if the kernel parameter "earlyprintk" has been specified, just like it works for other architectures that also provide an early boot console. This makes debugging of early problems much easier, since now we finally have working console output even before memory detection is running. The boot console will be automatically disabled as soon as another console will be registered. Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390/sclp: always stay within bounds of the early sccbHeiko Carstens2017-01-161-1/+6
| | | | | | | | | | | | | | | | | | | | | | Make sure the _sclp_print_lm function stays within bounds of the early sccb, even if the passed string is very long. If the string is too long, the remaining characters will be dropped. Suggested-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390/sclp: make early sclp irq handler more robustHeiko Carstens2017-01-162-6/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make the early sclp interrupt handler more robust: - disable all interrupt sub classes except for the service signal subclass - extend ctlreg0 union so it is easily possible to set the service signal subclass mask bit without using a magic number - disable lowcore protection before writing to it - make sure that all write accesses are done before the original content of control register 0 is restored, which could enable lowcore protection Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390/topology: make "topology=off" parameter workHeiko Carstens2017-01-162-9/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The "topology=off" kernel parameter is supposed to prevent the kernel to use hardware topology information to generate scheduling domains etc. For an unknown reason I implemented this in a very odd way back then: instead of simply clearing the MACHINE_HAS_TOPOLOGY flag within the lowcore I added a second variable which indicated that topology information should not be used. This is more than suboptimal since it partially doesn't work. For the fake NUMA case topology information is still considered and scheduling domains will be created based on this. To fix this and to simplify the code get rid of the extra variable and implement the "topology=off" case like it is done for other features. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390: use false/true when using boolHeiko Carstens2017-01-166-7/+7
| | | | | | | | | | | | | | | | Yet another trivial patch to reduce the noise that coccinelle generates. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390: remove couple of unneeded semicolonsHeiko Carstens2017-01-165-6/+6
| | | | | | | | | | | | | | | | Remove a couple of unneeded semicolons. This is just to reduce the noise that the coccinelle static code checker generates. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390/topology: reduce number of printksHeiko Carstens2017-01-161-5/+3
| | | | | | | | | | | | | | | | | | Merge the seven printks within topology_init_early to a single one. With an early boot console this avoids printing six lines each containing only a single character. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * s390/mem_detect: fix memory type of first blockHeiko Carstens2017-01-161-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix a long-standing but currently irrelevant bug: the memory detection code performs a tprot instruction on address zero to figure out if the first memory chunk is readable or writable. Due to low address protection the result is "read-only". If the memory detection code would actually care, it would have to ignore the first memory increment, but it adds the memory increment to writable memory anyway. If memblock debugging is enabled this leads to an extra rather surprising call which registers memory. To avoid this get rid of the first misleading tprot call and simply assume that the first memory increment is writable. Otherwise we wouldn't have reached the memory detection code anyway. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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