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d12292fd |
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19-Jan-2022 |
Vasily Gorbik <gor@linux.ibm.com> |
s390/sysinfo: add variable capacity information If available, add machine variable capacity information to /proc/sysinfo Acked-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
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5224f790 |
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14-Feb-2022 |
Gustavo A. R. Silva <gustavoars@kernel.org> |
treewide: Replace zero-length arrays with flexible-array members There is a regular need in the kernel to provide a way to declare having a dynamically sized set of trailing elements in a structure. Kernel code should always use “flexible array members”[1] for these cases. The older style of one-element or zero-length arrays should no longer be used[2]. This code was transformed with the help of Coccinelle: (next-20220214$ spatch --jobs $(getconf _NPROCESSORS_ONLN) --sp-file script.cocci --include-headers --dir . > output.patch) @@ identifier S, member, array; type T1, T2; @@ struct S { ... T1 member; T2 array[ - 0 ]; }; UAPI and wireless changes were intentionally excluded from this patch and will be sent out separately. [1] https://en.wikipedia.org/wiki/Flexible_array_member [2] https://www.kernel.org/doc/html/v5.16/process/deprecated.html#zero-length-and-one-element-arrays Link: https://github.com/KSPP/linux/issues/78 Reviewed-by: Kees Cook <keescook@chromium.org> Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
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5260b0f5 |
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24-Jan-2018 |
Hendrik Brueckner <brueckner@linux.vnet.ibm.com> |
s390/sysinfo: add and display licensed internal code identifier With z14, the store system information instruction provides an licensed internal code identifier. Display it in /proc/sysinfo. For more information, see the z/Architecture Principles of Operation. (SA22-7832-11). Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Reviewed-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>
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94bf2f28 |
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24-Nov-2017 |
Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
s390: include: Remove redundant license text Now that the SPDX tag is in all arch/s390/include/ files, that identifies the license in a specific and legally-defined manner. So the extra GPL text wording can be removed as it is no longer needed at all. This is done on a quest to remove the 700+ different ways that files in the kernel describe the GPL license text. And there's unneeded stuff like the address (sometimes incorrect) for the FSF which is never needed. No copyright headers or other non-license-description text was removed. Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Cornelia Huck <cohuck@redhat.com> Cc: Halil Pasic <pasic@linux.vnet.ibm.com> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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0b73214f |
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24-Nov-2017 |
Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
s390: add SPDX identifiers to the remaining files It's good to have SPDX identifiers in all files to make it easier to audit the kernel tree for correct licenses. Update the remaining arch/s390/ files with the correct SPDX license identifier based on the license text in the file itself. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This work is based on a script and data from Thomas Gleixner, Philippe Ombredanne, and Kate Stewart. Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Cornelia Huck <cohuck@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Kate Stewart <kstewart@linuxfoundation.org> Cc: Philippe Ombredanne <pombredanne@nexb.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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#
b7c92f1a |
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28-Sep-2017 |
QingFeng Hao <haoqf@linux.vnet.ibm.com> |
s390/sthyi: reorganize sthyi implementation As we need to support sthyi instruction on LPAR too, move the common code to kernel part and kvm related code to intercept.c for better reuse. Signed-off-by: QingFeng Hao <haoqf@linux.vnet.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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1887aa07 |
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22-Sep-2017 |
Martin Schwidefsky <schwidefsky@de.ibm.com> |
s390/topology: add detection of dedicated vs shared CPUs The topology information returned by STSI 15.x.x contains a flag if the CPUs of a topology-list are dedicated or shared. Make this information available if the machine provides topology information. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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e64e17a5 |
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11-May-2017 |
Christoph Hellwig <hch@lst.de> |
S390/sysinfo: use uuid_is_null instead of opencoding it And switch to use uuid_t instead of the old uuid_be type. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Amir Goldstein <amir73il@gmail.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
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80ba3846 |
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04-May-2017 |
Heiko Carstens <hca@linux.ibm.com> |
s390/topology: let topology_mnest_limit() return unsigned char Fixes a couple of compile warnings with gcc 7.1.0 : arch/s390/kernel/sysinfo.c:578:20: note: directive argument in the range [-2147483648, 4] sprintf(link_to, "15_1_%d", topology_mnest_limit()); Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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ae5ca67a |
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13-Mar-2017 |
Heiko Carstens <hca@linux.ibm.com> |
s390/sysinfo,topology: provide raw stsi 15,1,x data via debugfs Provide the raw stsi 15,1,x data contents via debugfs. This makes it much easier to debug unexpected scheduling domains on machines that provide cpu topology information. Therefore this file adds a new 's390/stsi' debugfs directory with a file for each possible topology nesting level that is allowed by the architecture. The files will be created regardless if the machine supports all, or any, level. If a level is not supported, or no data is available, user space can recognize this with a -EINVAL error code when trying to read such data. In addition a 'topology' symlink is created that points to the file that contains the data that is used to create the scheduling domains. Acked-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>
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251ea0ca |
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09-Mar-2017 |
Heiko Carstens <hca@linux.ibm.com> |
s390/topology: get rid of core mask array Use a single long value instead of a single element array to represent the core mask. The array is a leftover from 32/31 bit code so we were able to use bitops helper functions. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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#
e32eae10 |
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10-Nov-2016 |
Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com> |
s390/sysinfo: show partition extended name and UUID if available Extract extended name and UUID from SYSIB 2.2.2 data. As the code to convert the raw extended name into printable format can be reused by stsi_2_2_2 we're moving the conversion code into a separate function convert_ext_name. Signed-off-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com> Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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7022ec49 |
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30-Dec-2015 |
Heiko Carstens <hca@linux.ibm.com> |
s390/sysinfo: add missing SYSIB 1.2.2 multithreading fields Add missing multithreading fields of SYSIB 1.2.2 (Basic-Machine CPUs) to the output of /proc/sysinfo. Also use bitfields for SYSIB 2.2.2 to simplify the C code a bit. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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f3d0bd6c |
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20-Oct-2014 |
Ekaterina Tumanova <tumanova@linux.vnet.ibm.com> |
s390/kernel: Update /proc/sysinfo file with Extended Name and UUID A new architecture extends STSI 3.2.2 with UUID and long names. KVM will provide the first implementation. This patch adds the additional data fields (Extended Name and UUID) from the 4KB block returned by the STSI 3.2.2 command and reflect this information in the /proc/sysinfo file accordingly. Signed-off-by: Ekaterina Tumanova <tumanova@linux.vnet.ibm.com> Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
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10ad34bc |
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14-Jan-2015 |
Martin Schwidefsky <schwidefsky@de.ibm.com> |
s390: add SMT support 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>
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caf757c6 |
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06-Sep-2012 |
Heiko Carstens <hca@linux.ibm.com> |
s390/sysinfo,stsi: change return code handling Change return code handling of the stsi() function: In case function code 0 was specified the return value is the current configuration level (already shifted). That way all the code that actually copied the stsi_0() function can go away. Otherwise the return value is 0 (success) or negative to indicate an error (currently only -EOPNOTSUPP). Also stsi() is no longer an inline function. The function is not performance critical, but every caller would generate an exception table entry for this function. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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fade4dc4 |
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04-Sep-2012 |
Heiko Carstens <hca@linux.ibm.com> |
s390/sysinfo,topology: fix cpu topology maximum nesting detection The maximum nesting of the cpu topology is evaluated when /proc/sysinfo is the first time read. This happens without a lock and a concurrent reader on a different cpu can see and use an invalid intermediate value. Besides the fact that this race is quite unlikely the worst thing that could happen is that /proc/sysinfo would contain bogus information about the machine's cpu topology. Nevertheless this should be fixed. So move the detection code to the early machine detection code and since now the value is early available use it in the topology code as well. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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#
25502f00 |
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03-Sep-2012 |
Heiko Carstens <hca@linux.ibm.com> |
s390/sysinfo: add additional z196 fields to output Add a couple of missing fields that were introduced with z196. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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a53c8fab |
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20-Jul-2012 |
Heiko Carstens <hca@linux.ibm.com> |
s390/comments: unify copyright messages and remove file names Remove the file name from the comment at top of many files. In most cases the file name was wrong anyway, so it's rather pointless. Also unify the IBM copyright statement. We did have a lot of sightly different statements and wanted to change them one after another whenever a file gets touched. However that never happened. Instead people start to take the old/"wrong" statements to use as a template for new files. So unify all of them in one go. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
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c30f91b6 |
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25-Oct-2010 |
Heiko Carstens <hca@linux.ibm.com> |
[S390] topology: move topology sysinfo code Move the topology sysinfo SYSIB definitions to the proper place in asm/sysinfo.h where they should be. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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7aca2eda |
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25-Oct-2010 |
Heiko Carstens <hca@linux.ibm.com> |
[S390] sysinfo: display capacity adjustment indicator Display machine capacity adjustment indicator and capacity change reason if available in /proc/sysinfo. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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8387c736 |
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26-Feb-2010 |
Heiko Carstens <hca@linux.ibm.com> |
[S390] sysinfo: fix SYSIB 3,2,2 structure The size of the field that contains the description block count is only four bits instead of eight bits. The first four bits are reserved but this might change and break. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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92e6ecf3 |
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26-Mar-2009 |
Christian Borntraeger <borntraeger@de.ibm.com> |
[S390] Fix hypervisor detection for KVM Currently we use the cpuid (via STIDP instruction) to recognize LPAR, z/VM and KVM. The architecture states, that bit 0-7 of STIDP returns all zero, and if STIDP is executed in a virtual machine, the VM operating system will replace bits 0-7 with FF. KVM should not use FE to distinguish z/VM from KVM for interested guests. The proper way to detect the hypervisor is the STSI (Store System Information) instruction, which return information about the hypervisors via function code 3, selector1=2, selector2=2. This patch changes the detection routine of Linux to use STSI instead of STIDP. This detection is earlier than bootmem, we have to use a static buffer. Since STSI expects a 4kb block (4kb aligned) this patch also changes the init.data alignment for s390. As this section will be freed during boot, this should be no problem. Patch is tested with LPAR, z/VM, KVM on LPAR, and KVM under z/VM. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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6bcac508 |
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25-Dec-2008 |
Martin Schwidefsky <schwidefsky@de.ibm.com> |
[S390] service level interface. Add a new proc interface /proc/service_levels that allows any code to report a relevant service level, e.g. the microcode level of devices, the service level of the hypervisor, etc. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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c6557e7f |
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01-Aug-2008 |
Martin Schwidefsky <schwidefsky@de.ibm.com> |
[S390] move include/asm-s390 to arch/s390/include/asm Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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