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* s390: add SMT supportMartin Schwidefsky2015-01-2218-118/+430
| | | | | | | | | | | | | | | | | | | | The multi-threading facility is introduced with the z13 processor family. This patch adds code to detect the multi-threading facility. With the facility enabled each core will surface multiple hardware threads to the system. Each hardware threads looks like a normal CPU to the operating system with all its registers and properties. The SCLP interface reports the SMT topology indirectly via the maximum thread id. Each reported CPU in the result of a read-scp-information is a core representing a number of hardware threads. To reflect the reduced CPU capacity if two hardware threads run on a single core the MT utilization counter set is used to normalize the raw cputime obtained by the CPU timer deltas. This scaled cputime is reported via the taskstats interface. The normal /proc/stat numbers are based on the raw cputime and are not affected by the normalization. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390: avoid z13 cache aliasingMartin Schwidefsky2015-01-225-18/+155
| | | | | | | | Avoid cache aliasing on z13 by aligning shared objects to multiples of 512K. The virtual addresses of a page from a shared file needs to have identical bits in the range 2^12 to 2^18. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390: add z13 code generation supportMartin Schwidefsky2015-01-224-1/+26
| | | | | | Allow to generate code that only runs on z13 machines. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/hmcdrv: remove unnecessary version.h inclusionSyam Sidhardhan2015-01-151-1/+0
| | | | | | | | version.h inclusion is not necessary as detected by versioncheck. Signed-off-by: Syam Sidhardhan <s.syam@samsung.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/docs: Remove section about script debugging from Debugging390.txtThomas Huth2015-01-151-29/+0
| | | | | | | | | The section about debugging scripting languages has nothing to do with s390 (and the example is even apparently taken from a i586 host instead), so let's remove this chapter from the file. Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/docs: Break long lines in Debugging390.txtThomas Huth2015-01-151-227/+237
| | | | | | | | | | | There are a lot of lines that are longer than 80 columns in this file, rendering it hard to read in a terminal window. This patch fixes most of these long lines, and while we're at it, also makes some sentences more readable, e.g. by replacing "&" with "and", adding proper punctuation, removing superfluous clauses, etc. Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390: move cacheinfo sysfs to generic cacheinfo infrastructureSudeep Holla2015-01-081-296/+92
| | | | | | | | | | | This patch removes the redundant sysfs cacheinfo code by reusing the newly introduced generic cacheinfo infrastructure through the commit 246246cbde5e ("drivers: base: support cpu cache information interface to userspace via sysfs") Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/crypto: remove 'const' to avoid compiler warningsChen Gang2015-01-081-2/+2
| | | | | | | | | | | | | | | | | | | | | In aes_encrypt() and aes_decrypt(), need let 'sctx->key' be modified, so remove 'const' for it. The related warnings: CC [M] arch/s390/crypto/aes_s390.o arch/s390/crypto/aes_s390.c: In function 'aes_encrypt': arch/s390/crypto/aes_s390.c:146:37: warning: passing argument 2 of 'crypt_s390_km' discards 'const' qualifier from pointer target type [-Wdiscarded-array-qualifiers] crypt_s390_km(KM_AES_128_ENCRYPT, &sctx->key, out, in, ^ ... In file included from arch/s390/crypto/aes_s390.c:29:0: arch/s390/crypto/crypt_s390.h:154:19: note: expected 'void *' but argument is of type 'const u8 (*)[32] {aka const unsigned char (*)[32]}' static inline int crypt_s390_km(long func, void *param, ^ Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390: remove unnecessary KERN_CONTJoe Perches2015-01-081-1/+1
| | | | | | | | | | | This has no effect as KERN_CONT is an empty string, It's probably just a missing conversion artifact as the other pr_cont uses in the same file don't have this prefix. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/sclp: sign extend return value of _sclp_print_early()Heiko Carstens2015-01-081-1/+2
| | | | | | | | | | _sclp_print_early() has a return value, but misses to sign extend it if called from 64 bit code. This is not really a bug, since currently no caller cares what the return value is. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/sclp: fix declaration of _sclp_print_early()Chen Gang2015-01-082-2/+3
| | | | | | | | | | | | | | | | | | | | _sclp_print_early() has return value: at present, return 0 for OK, 1 for failure. It returns '%r2', so use 'long' as return value (upper caller can check '%r2' directly). The related warning: CC arch/s390/boot/compressed/misc.o arch/s390/boot/compressed/misc.c:66:8: warning: type defaults to 'int' in declaration of '_sclp_print_early' [-Wimplicit-int] extern _sclp_print_early(const char *); ^ At present, _sclp_print_early() is only used by puts(), so can still remain its declaration in 'misc.c' file. [heiko.carstens@de.ibm.com]: move declaration to sclp.h header file Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390: keep Kconfig sortedHeiko Carstens2015-01-081-1/+1
| | | | | Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/cio: idset.c: remove some unused functionsRickard Strandqvist2015-01-082-22/+0
| | | | | | | | | | | Removes some functions that are not used anywhere: idset_clear() idset_sch_get_first() This was partially found by using a static code analysis program called cppcheck. Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/signal: add sys_sigreturn and sys_rt_sigreturn declarationsHeiko Carstens2015-01-081-1/+3
| | | | | | | | Get rid of sparse warnings like this one: arch/s390/kernel/signal.c:244:1: warning: symbol 'sys_sigreturn' was not declared. Should it be static? Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* s390/pgtable: add unsigned long castsHeiko Carstens2015-01-081-3/+3
| | | | | | | Get rid of warnings like this one: warning: constant 0xffe0000000000000 is so big it is unsigned long Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* s390/disassembler: remove indentical initializerHeiko Carstens2015-01-081-1/+0
| | | | | | Remove one of the two identical initializer entries. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* s390/pci: add missing address space annotationHeiko Carstens2015-01-081-2/+2
| | | | Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* s390/ftrace: add code replacement sanity checksHeiko Carstens2015-01-081-46/+49
| | | | | | | Always verify that the to be replaced code matches what we expect to see. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/mm: avoid using pmd_to_page for !USE_SPLIT_PMD_PTLOCKSMartin Schwidefsky2015-01-081-2/+3
| | | | | | | | | | pmd_to_page() is only available if USE_SPLIT_PMD_PTLOCKS is defined. The use of pmd_to_page in the gmap code can cause compile errors if NR_CPUS is smaller than SPLIT_PTLOCK_CPUS. Do not use pmd_to_page outside of USE_SPLIT_PMD_PTLOCKS sections. Reported-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/timex: fix get_tod_clock_ext() inline assemblyChen Gang2015-01-072-5/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | For C language, it treats array parameter as a pointer, so sizeof for an array parameter is equal to sizeof for a pointer, which causes compiler warning (with allmodconfig by gcc 5): ./arch/s390/include/asm/timex.h: In function 'get_tod_clock_ext': ./arch/s390/include/asm/timex.h:76:32: warning: 'sizeof' on array function parameter 'clk' will return size of 'char *' [-Wsizeof-array-argument] typedef struct { char _[sizeof(clk)]; } addrtype; ^ Can use macro CLOCK_STORE_SIZE instead of all related hard code numbers, which also can avoid this warning. And also add a tab to CLOCK_TICK_RATE definition to match coding styles. [heiko.carstens@de.ibm.com]: Chen's patch actually fixes a bug within the get_tod_clock_ext() inline assembly where we incorrectly tell the compiler that only 8 bytes of memory get changed instead of 16 bytes. This would allow gcc to generate incorrect code. Right now this doesn't seem to be the case. Also slightly changed the patch a bit. - renamed CLOCK_STORE_SIZE to STORE_CLOCK_EXT_SIZE - changed get_tod_clock_ext() to receive a char pointer parameter Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390: wire up execveat syscallHeiko Carstens2014-12-182-1/+3
| | | | | Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/kernel: use stnsm 255 instead of stosm 0Christian Borntraeger2014-12-181-1/+1
| | | | | | | On some models, stnsm 255 might be slightly faster than stosm 0. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/vtime: Get rid of redundant WARN_ONChristian Borntraeger2014-12-181-2/+0
| | | | | | | | | | | | | | in the cpu time accounting function vtime_account_irq_enter (vtime_account_system) we use a WARN_ON_ONCE(!irqs_disabled()). This is redundant as the function virt_timer_forward is always called and has a BUG_ON(!irqs_disabled()). This saves several nanoseconds in my specific testcase (KVM entry/exit) and probably all other callers like (soft)irq entry/exit. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/zcrypt: kernel oops at insmod of the z90crypt device driverHarald Freudenberger2014-12-181-3/+7
| | | | | | | | | | | | | | | | | Kernel oops caused by invalid parameter at TAPQ instruction: On older systems where the QCI instruction is not available all possible domains are probed via TAPQ instruction. The range for the probe has been extended with the > 16 domain support now leading to a possible specification exception when this instruction is called for probing higher values within the new range. This may happen during insmod and/or ap bus reset only on machines without a QCI instruction (z10, z196, z114), zEC12 and newer systems are not affected. The fix modifies the domain checking function to limit the allowed range if no QCI info is available. Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* Ceph: remove left-over reject fileLinus Torvalds2014-12-181-10/+0
| | | | | | | | | | | | Neither Sage nor I noticed that Zheng Yan had mistakenly committed fs/ceph/super.h.rej as part of commit 31c542a199d7 ("ceph: add inline data to pagecache"). Remove it. Requested-by: Yan, Zheng <ukernel@gmail.com> Cc: Sage Weil <sweil@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'for-linus' of ↵Linus Torvalds2014-12-1829-180/+992
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client Pull ceph updates from Sage Weil: "The big item here is support for inline data for CephFS and for message signatures from Zheng. There are also several bug fixes, including interrupted flock request handling, 0-length xattrs, mksnap, cached readdir results, and a message version compat field. Finally there are several cleanups from Ilya, Dan, and Markus. Note that there is another series coming soon that fixes some bugs in the RBD 'lingering' requests, but it isn't quite ready yet" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: (27 commits) ceph: fix setting empty extended attribute ceph: fix mksnap crash ceph: do_sync is never initialized libceph: fixup includes in pagelist.h ceph: support inline data feature ceph: flush inline version ceph: convert inline data to normal data before data write ceph: sync read inline data ceph: fetch inline data when getting Fcr cap refs ceph: use getattr request to fetch inline data ceph: add inline data to pagecache ceph: parse inline data in MClientReply and MClientCaps libceph: specify position of extent operation libceph: add CREATE osd operation support libceph: add SETXATTR/CMPXATTR osd operations support rbd: don't treat CEPH_OSD_OP_DELETE as extent op ceph: remove unused stringification macros libceph: require cephx message signature by default ceph: introduce global empty snap context ceph: message versioning fixes ...
| * ceph: fix setting empty extended attributeYan, Zheng2014-12-171-2/+5
| | | | | | | | | | | | | | | | make sure 'value' is not null. otherwise __ceph_setxattr will remove the extended attribute. Signed-off-by: Yan, Zheng <zyan@redhat.com> Reviewed-by: Sage Weil <sage@redhat.com>
| * ceph: fix mksnap crashYan, Zheng2014-12-171-1/+3
| | | | | | | | | | | | | | | | | | mksnap reply only contain 'target', does not contain 'dentry'. So it's wrong to use req->r_reply_info.head->is_dentry to detect traceless reply. Signed-off-by: Yan, Zheng <zyan@redhat.com> Reviewed-by: Sage Weil <sage@redhat.com>
| * ceph: do_sync is never initializedDan Carpenter2014-12-171-1/+1
| | | | | | | | | | | | | | | | | | | | Probably this code was syncing a lot more often then intended because the do_sync variable wasn't set to zero. Cc: stable@vger.kernel.org # v3.11+ Fixes: c62988ec0910 ('ceph: avoid meaningless calling ceph_caps_revoking if sync_mode == WB_SYNC_ALL.') Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Ilya Dryomov <idryomov@redhat.com>
| * libceph: fixup includes in pagelist.hIlya Dryomov2014-12-171-1/+3
| | | | | | | | | | | | | | pagelist.h needs to include linux/types.h and asm/byteorder.h and not rely on other headers pulling yet another set of headers. Signed-off-by: Ilya Dryomov <idryomov@redhat.com>
| * ceph: support inline data featureYan, Zheng2014-12-171-1/+2
| | | | | | | | Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: flush inline versionYan, Zheng2014-12-173-4/+23
| | | | | | | | | | | | | | | | | | | | After converting inline data to normal data, client need to flush the new i_inline_version (CEPH_INLINE_NONE) to MDS. This commit makes cap messages (sent to MDS) contain inline_version and inline_data. Client always converts inline data to normal data before data write, so the inline data length part is always zero. Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: convert inline data to normal data before data writeYan, Zheng2014-12-173-3/+161
| | | | | | | | | | | | | | | | | | | | Before any data write, convert inline data to normal data and set i_inline_version to CEPH_INLINE_NONE. The OSD request that saves inline data to object contains 3 operations (CMPXATTR, WRITE and SETXATTR). It compares a xattr named 'inline_version' to prevent old data overwrites newer data. Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: sync read inline dataYan, Zheng2014-12-172-13/+116
| | | | | | | | | | | | | | | | we can't use getattr to fetch inline data while holding Fr cap, because it can cause deadlock. If we need to sync read inline data, drop cap refs first, then use getattr to fetch inline data. Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: fetch inline data when getting Fcr cap refsYan, Zheng2014-12-173-18/+63
| | | | | | | | | | | | | | | | | | | | we can't use getattr to fetch inline data after getting Fcr caps, because it can cause deadlock. The solution is try bringing inline data to page cache when not holding any cap, and hope the inline data page is still there after getting the Fcr caps. If the page is still there, pin it in page cache for later IO. Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: use getattr request to fetch inline dataYan, Zheng2014-12-174-10/+34
| | | | | | | | | | | | | | Add a new parameter 'locked_page' to ceph_do_getattr(). If inline data in getattr reply will be copied to the page. Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: add inline data to pagecacheYan, Zheng2014-12-176-1/+85
| | | | | | | | | | | | | | Request reply and cap message can contain inline data. add inline data to the page cache if there is Fc cap. Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: parse inline data in MClientReply and MClientCapsYan, Zheng2014-12-173-11/+36
| | | | | | | | Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * libceph: specify position of extent operationYan, Zheng2014-12-174-20/+19
| | | | | | | | | | | | | | | | | | allow specifying position of extent operation in multi-operations osd request. This is required for cephfs to convert inline data to normal data (compare xattr, then write object). Signed-off-by: Yan, Zheng <zyan@redhat.com> Reviewed-by: Ilya Dryomov <idryomov@redhat.com>
| * libceph: add CREATE osd operation supportYan, Zheng2014-12-171-20/+22
| | | | | | | | | | | | | | | | Add CEPH_OSD_OP_CREATE support. Also change libceph to not treat CEPH_OSD_OP_DELETE as an extent op and add an assert to that end. Signed-off-by: Yan, Zheng <zyan@redhat.com> Reviewed-by: Ilya Dryomov <idryomov@redhat.com>
| * libceph: add SETXATTR/CMPXATTR osd operations supportYan, Zheng2014-12-172-0/+57
| | | | | | | | | | Signed-off-by: Yan, Zheng <zyan@redhat.com> Reviewed-by: Ilya Dryomov <idryomov@redhat.com>
| * rbd: don't treat CEPH_OSD_OP_DELETE as extent opIlya Dryomov2014-12-171-2/+6
| | | | | | | | | | | | | | | | | | | | CEPH_OSD_OP_DELETE is not an extent op, stop treating it as such. This sneaked in with discard patches - it's one of the three osd ops (the other two are CEPH_OSD_OP_TRUNCATE and CEPH_OSD_OP_ZERO) that discard is implemented with. Signed-off-by: Ilya Dryomov <idryomov@redhat.com> Reviewed-by: Alex Elder <elder@linaro.org>
| * ceph: remove unused stringification macrosIlya Dryomov2014-12-171-3/+0
| | | | | | | | | | | | These were used to report git versions a long time ago. Signed-off-by: Ilya Dryomov <idryomov@redhat.com>
| * libceph: require cephx message signature by defaultYan, Zheng2014-12-172-0/+14
| | | | | | | | | | Signed-off-by: Yan, Zheng <zyan@redhat.com> Reviewed-by: Ilya Dryomov <idryomov@redhat.com>
| * ceph: introduce global empty snap contextYan, Zheng2014-12-173-3/+35
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Current snaphost code does not properly handle moving inode from one empty snap realm to another empty snap realm. After changing inode's snap realm, some dirty pages' snap context can be not equal to inode's i_head_snap. This can trigger BUG() in ceph_put_wrbuffer_cap_refs() The fix is introduce a global empty snap context for all empty snap realm. This avoids triggering the BUG() for filesystem with no snapshot. Fixes: http://tracker.ceph.com/issues/9928 Signed-off-by: Yan, Zheng <zyan@redhat.com> Reviewed-by: Ilya Dryomov <idryomov@redhat.com>
| * ceph: message versioning fixesJohn Spray2014-12-171-2/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | There were two places we were assigning version in host byte order instead of network byte order. Also in MSG_CLIENT_SESSION we weren't setting compat_version in the header to reflect continued compatability with older MDSs. Fixes: http://tracker.ceph.com/issues/9945 Signed-off-by: John Spray <john.spray@redhat.com> Reviewed-by: Sage Weil <sage@redhat.com>
| * libceph: update ceph_msg_header structureJohn Spray2014-12-171-1/+2
| | | | | | | | | | | | | | | | 2 bytes of what was reserved space is now used by userspace for the compat_version field. Signed-off-by: John Spray <john.spray@redhat.com> Reviewed-by: Sage Weil <sage@redhat.com>
| * libceph: message signature supportYan, Zheng2014-12-178-4/+162
| | | | | | | | Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * libceph: store session key in cephx authorizerYan, Zheng2014-12-172-7/+12
| | | | | | | | | | | | | | Session key is required when calculating message signature. Save the session key in authorizer, this avoid lookup ticket handler for each message Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph, rbd: delete unnecessary checks before two function callsSF Markus Elfring2014-12-174-14/+7
| | | | | | | | | | | | | | | | | | | | | | | | The functions ceph_put_snap_context() and iput() test whether their argument is NULL and then return immediately. Thus the test around the call is not needed. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> [idryomov@redhat.com: squashed rbd.c hunk, changelog] Signed-off-by: Ilya Dryomov <idryomov@redhat.com>
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