- 06 Dec, 2022 5 commits
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Heiko Carstens authored
Use vector instruction macros instead of byte patterns to increase readability. The generated code is nearly identical: - 1e8: e7 0f 10 00 00 36 vlm %v0,%v15,0(%r1) - 1ee: e7 0f 11 00 0c 36 vlm %v16,%v31,256(%r1) + 1e8: e7 0f 10 00 30 36 vlm %v0,%v15,0(%r1),3 + 1ee: e7 0f 11 00 3c 36 vlm %v16,%v31,256(%r1),3 By using the VLM macro the alignment hint is automatically specified too. Even though from a performance perspective it doesn't matter at all for the machine check code, this shows yet another benefit when using the macros. Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
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Heiko Carstens authored
The vector instruction macros can also be used in inline assemblies. For this the magic asm(".include \"asm/vx-insn.h\"\n"); must be added to C files in order to avoid that the pre-processor eliminates the __ASSEMBLY__ guarded macros. This however comes with the problem that changes to asm/vx-insn.h do not cause a recompile of C files which have only this magic statement instead of a proper include statement. This can be observed with the arch/s390/kernel/fpu.c file. In order to fix this problem and also to avoid that the include must be specified twice, add a wrapper include header file which will do all necessary steps. This way only the vx-insn.h header file needs to be included and changes to the new vx-insn-asm.h header file cause a recompile of all dependent files like it should. Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
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Sven Schnelle authored
octal values are easier to read and checkpatch also recommends to use them, so replace all the S_* macros with their counterparts. Signed-off-by: Sven Schnelle <svens@linux.ibm.com> Reviewed-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
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Sven Schnelle authored
This adds support to use ECKD disks as dump device to linux. The new dump type is called 'eckd_dump', parameters are the same as for eckd ipl. Signed-off-by: Sven Schnelle <svens@linux.ibm.com> Reviewed-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
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Sven Schnelle authored
This adds support to IPL from ECKD DASDs to linux. It introduces a few sysfs files in /sys/firmware/reipl/eckd: bootprog: the boot program selector clear: whether to issue a diag308 LOAD_NORMAL or LOAD_CLEAR device: the device to ipl from br_chr: Cylinder/Head/Record number to read the bootrecord from. Might be '0' or 'auto' if it should be read from the volume label. scpdata: data to be passed to the ipl'd program. The new ipl type is called 'eckd'. Signed-off-by: Sven Schnelle <svens@linux.ibm.com> Reviewed-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
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- 05 Dec, 2022 2 commits
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Eric Farman authored
The CCW data address created by vfio-ccw is that of an IDAL built by this code. Since this address is used by real hardware, it should be a physical address rather than a virtual one. Let's clarify it as such in the ORB. Similarly, once the I/O has completed the memory for that IDAL needs to be released, so convert the CCW data address back to a virtual address so that kfree() can process it. Note: this currently doesn't fix a real bug, since virtual addresses are identical to physical ones. Signed-off-by: Eric Farman <farman@linux.ibm.com> Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com> Reviewed-by: Nico Boehr <nrb@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com> Link: https://lore.kernel.org/r/20221121165836.283781-3-farman@linux.ibm.com
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Alexander Gordeev authored
The ORB's interrupt parameter field is stored unmodified into the interruption code when an I/O interrupt occurs. As this reflects a real device, let's store the physical address of the subchannel struct so it can be used when processing an interrupt. Note: this currently doesn't fix a real bug, since virtual addresses are identical to physical ones. Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com> [EF: Updated commit message] Signed-off-by: Eric Farman <farman@linux.ibm.com> Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com> Reviewed-by: Nico Boehr <nrb@linux.ibm.com> Link: https://lore.kernel.org/r/20221121165836.283781-2-farman@linux.ibm.com
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- 02 Dec, 2022 2 commits
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Heiko Carstens authored
This is the s390 variant of commit d911c67e ("x86: kasan: kmsan: support CONFIG_GENERIC_CSUM on x86, enable it for KASAN/KMSAN"). Even though most of the s390 specific checksum code is written in C there is still the csum_partial() inline assembly which could prevent KASAN and KMSAN from seeing all memory accesses. Therefore switch to GENERIC_CSUM if KASAN is enabled just like x86. Reviewed-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
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Heiko Carstens authored
Support for power managemant has been removed from s390 since quite some time. Therefore remove unused power managemant code from the appldata device driver. Reviewed-by: Gerald Schaefer <gerald.schaefer@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
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- 01 Dec, 2022 1 commit
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Alexander Gordeev authored
This does not fix a real bug, since virtual addresses are currently indentical to physical ones. Use virt_to_phys() for intparm interrupt parameter to convert a 64-bit virtual address to the 32-bit physical address, which is expected to be below 2GB. Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
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- 29 Nov, 2022 3 commits
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Heiko Carstens authored
Make sclp's con_drop sysfs attribute also writable, and allow to change its value during runtime. This way handling of sclp console drop handling is consistent with the 3215 device driver. Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
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Heiko Carstens authored
Use sysfs_emit() for all sclp sysfs show functions, which is the current standard way to generate output strings. Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
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Heiko Carstens authored
Use kstrobool() to parse sclp_con_drop parameter. This way handling of valid values for the sclp_con_drop parameter is identical to the con3215_drop parameter. In particular this allows to pass values like "yes" and "true", which was not possible before. Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
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- 23 Nov, 2022 8 commits
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Heiko Carstens authored
If CONFIG_TN3270_CONSOLE is not enabled clang emits the following warning: drivers/s390/char/raw3270.c:114:19: error: unused function 'raw3270_state_final' [-Werror,-Wunused-function] static inline int raw3270_state_final(struct raw3270 *rp) Get rid of this warning by making raw3270_state_final() only available if CONFIG_TN3270_CONSOLE is enabled. Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
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Heiko Carstens authored
clang warns about an unused insn cache ops function: arch/s390/kernel/kprobes.c:34:1: error: unused function 'is_kprobe_s390_insn_slot' [-Werror,-Wunused-function] DEFINE_INSN_CACHE_OPS(s390_insn); ^ ./include/linux/kprobes.h:335:20: note: expanded from macro 'DEFINE_INSN_CACHE_OPS' static inline bool is_kprobe_##__name##_slot(unsigned long addr) \ ^ <scratch space>:88:1: note: expanded from here is_kprobe_s390_insn_slot ^ Move the definition to a private header file, which is also similar to the generic insn cache ops. Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
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Heiko Carstens authored
Remove unused get_page_state() function: arch/s390/mm/page-states.c:61:29: error: unused function 'get_page_state' [-Werror,-Wunused-function] Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
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Heiko Carstens authored
Remove unused info_blk_hdr__pcpus() function: arch/s390/hypfs/hypfs_diag.c:71:21: error: unused function 'info_blk_hdr__pcpus' [-Werror,-Wunused-function] Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
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Heiko Carstens authored
clang warns about an incompatible function type cast: CC arch/s390/kernel/debug.o arch/s390/kernel/debug.c:142:2: error: cast from 'int (*)(debug_info_t *, struct debug_view *, char *, debug_sprintf_entry_t *)' (aka 'int (*)(struct debug_info *, struct debug_view *, char *, debug_sprintf_entry_t *)') to 'debug_format_proc_t *' (aka 'int (*)(struct debug_info *, struct debug_view *, char *, const char *)') converts to incompatible function type [-Werror,-Wcast-function-type-strict] (debug_format_proc_t *)&debug_sprintf_format_fn, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Get rid of this warning by changing debug_sprintf_format_fn() so it matches the debug_format_proc_t function type, and do the cast of the last parameter within the function itself. This is the standard way of handling such cases anyway. Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
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Thomas Gleixner authored
No point in doing another lookup of irq_data, it's already provided as an argument. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com> Reviewed-by: Niklas Schnelle <schnelle@linux.ibm.com> Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com> Link: https://lore.kernel.org/linux-s390/8735aoui07.ffs@tglx/ [agordeev@linux.ibm.com added Link tag] Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
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Christophe JAILLET authored
strtobool() is the same as kstrtobool(). However, the latter is more used within the kernel. In order to remove strtobool() and slightly simplify kstrtox.h, switch to the other function name. While at it, include the corresponding header file (<linux/kstrtox.h>) Link: https://lore.kernel.org/all/cover.1667336095.git.christophe.jaillet@wanadoo.fr/Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
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Heiko Carstens authored
s390 allows to enable CONFIG_NUMA, mainly to enable a couple of system calls which are only present if NUMA is enabled. The NUMA specific system calls are required by a couple of applications, which wouldn't work if the system calls wouldn't be present. The NUMA implementation itself maps all CPUs and memory to node 0. A special case is the generic percpu setup code, which doesn't expect an s390 like implementation and therefore emits a message/warning: "percpu: cpu 0 has no node -1 or node-local memory". In order to get rid of this message, and also to provide sane CPU to node and CPU distance mappings implement a minimal setup_per_cpu_areas() function, which is very close to the generic variant. Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
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- 16 Nov, 2022 4 commits
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Heiko Carstens authored
The generic vga.h contains a couple of defines, which do no harm on s390. Therefore use the generic version and git rid of the s390 specific empty header file. Suggested-by: Sven Schnelle <svens@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
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Heiko Carstens authored
Use generic shmparam.h header file since the contents are identical. Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
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Heiko Carstens authored
Use the generic bugs.h header file. Except for an excellent comment the header files are identical. Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
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Heiko Carstens authored
There is no serial driver on s390, especially none that relies on a bogus BASE_BAUD define. Therefore use the generic header file. Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
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- 10 Nov, 2022 1 commit
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Gerald Schaefer authored
Enable HUGETLB_PAGE_OPTIMIZE_VMEMMAP for s390. With this, vmemmap pages used to back struct pages for compound tail pages of hugetlb pages are freed and remapped to compound head page frame as RO, see also Documentation/vm/vmemmap_dedup.rst. For 1M hugetlb pages, this results in freeing 3 of 4 vmemmap pages, saving 12K of memory for each 1M hugetlb page (~1.2%). /sys/kernel/debug/kernel_page_tables will show the impact: ---[ vmemmap Area Start ]--- [...] 0x0000037202d84000-0x0000037202d85000 4K PTE RW NX 0x0000037202d85000-0x0000037202d88000 12K PTE RO NX For 2G hugetlb pages, this results in freeing 8191 of 8192 vmemmap pages, saving 32764K of memory for each 2G hugetlb page (~1.6%) /sys/kernel/debug/kernel_page_tables will show the impact: ---[ vmemmap Area Start ]--- [...] 0x000003720a000000-0x000003720a001000 4K PTE RW NX 0x000003720a001000-0x000003720c000000 32764K PTE RO NX The memory savings come with some costs: - vmemmap mapping for compound hugetlb pages is not a PMD mapping any more, but split to 4K PTE mappings, and it will not be coalesced back to PMD mapping after freeing hugetlb pages from the pool. Apart from theoretical performance impact, this will also (slightly) relativize the memory savings because of additional 2K PTE pagetable allocations. - Workload using "on the fly" hugetlb allocations via "nr_overcommit_hugepages" instead of using the hugetlb pool via "nr_hugepages" will suffer from considerably increased fault handling time, see also description from commit 78f39084 ("mm: hugetlb_vmemmap: add hugetlb_optimize_vmemmap sysctl"). - Freeing hugetlb pages from the pool will require re-allocation of the freed struct pages, and therefore needs some memory available to the kernel. This might fail in memory constrained scenarios. - For the same reason, memory offline might fail even for ZONE_MOVABLE when hugetlb pages are present (but not for s390, since we do not support ARCH_ENABLE_HUGEPAGE_MIGRATION, and therefore cannot have hugetlb pages in ZONE_MOVABLE). - General increased complexity and overhead in kernel handling of compound (head) pages. Therefore, this feature is disabled by default, and has to be enabled explicitly either by adding "hugetlb_free_vmemmap=on" kernel parameter, or during run-time via "/proc/sys/vm/hugetlb_optimize_vmemmap" sysctl. Acked-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Gerald Schaefer <gerald.schaefer@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
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- 26 Oct, 2022 6 commits
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Thomas Richter authored
Rename structure member users to active_events to make it consistent with PMU pai_ext. Also use the same prefix syntax for increment and decrement operators in both PMUs. Signed-off-by: Thomas Richter <tmricht@linux.ibm.com> Acked-by: Sumanth Korikkar <sumanthk@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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Thomas Richter authored
Rework the mapped buffer reference count in PMU pai_crypto to match the same technique as in PMU pai_ext. This simplifies the logic. Do not count the individual number of counter and sampling processes. Remember the type of access and the total number of references to the buffer. Signed-off-by: Thomas Richter <tmricht@linux.ibm.com> Acked-by: Sumanth Korikkar <sumanthk@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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Thomas Richter authored
Move enum definition to header file. This is done in preparation for a follow on patch where this enum will be used in another source file. Also change the enum name from paiext_mode to paievt_mode to indicate this enum is now used for several events. Make naming consistent and rename PAI_MODE_COUNTER to PAI_MODE_COUNTING. Signed-off-by: Thomas Richter <tmricht@linux.ibm.com> Acked-by: Sumanth Korikkar <sumanthk@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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Thomas Richter authored
Adjust white space according to coding guidelines. Signed-off-by: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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Thomas Richter authored
Using z/VM the 3270 terminal emulator also emulates an IBM 3215 console which outputs line by line. When the screen is full, the console enters the MORE... state and waits for the operator to confirm the data on the screen by pressing a clear key. If this does not happen in the default time frame (currently 50 seconds) the console enters the HOLDING state. It then waits another time frame (currently 10 seconds) before the output continues on the next screen. When the operator presses the clear key during these wait times, the output continues immediately. This may lead to a very long boot time when the console has to print many messages, also the system may hang because of the console's limited buffer space and the system waits for the console output to drain and finally to finish. This problem can only occur when a terminal emulator is actually connected to the 3215 console driver. If not z/VM simply drops console output. Remedy this rare situation and add a kernel boot command line parameter con3215_drop. It can be set to 0 (do not drop) or 1 (do drop) which is the default. This instructs the kernel drop console data when the console buffer is full. This speeds up the boot time considerable and also does not hang the system anymore. Add a sysfs attribute file for console IBM 3215 named con_drop. This allows for changing the behavior after the boot, for example when during interactive debugging a panic/crash is expected. Here is a test of the new behavior using the following test program: #/bin/bash declare -i cnt=4 mode=$(cat /sys/bus/ccw/drivers/3215/con_drop) [ $mode = yes ] && cnt=25 echo "cons_drop $(cat /sys/bus/ccw/drivers/3215/con_drop)" echo "vmcp term more 5 2" vmcp term more 5 2 echo "Run $cnt iterations of "'echo t > /proc/sysrq-trigger' for i in $(seq $cnt) do echo "$i. command 'echo t > /proc/sysrq-trigger' at $(date +%F,%T)" echo t > /proc/sysrq-trigger sleep 1 done echo "droptest done" > /dev/kmsg # Output with sysfs attribute con_drop set to 1: # ./droptest.sh cons_drop yes vmcp term more 5 2 Run 25 iterations of echo t > /proc/sysrq-trigger 1. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:09 2. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:10 3. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:11 4. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:12 5. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:13 6. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:14 7. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:15 8. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:16 9. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:17 10. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:18 11. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:19 12. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:20 13. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:21 14. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:22 15. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:23 16. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:24 17. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:25 18. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:26 19. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:27 20. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:28 21. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:29 22. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:30 23. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:31 24. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:32 25. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:33 # There are no hangs anymore. Output with sysfs attribute con_drop set to 0 and identical setting for z/VM console 'term more 5 2'. Sometimes hitting the clear key at the x3270 console to progress output. # ./droptest.sh cons_drop no vmcp term more 5 2 Run 4 iterations of echo t > /proc/sysrq-trigger 1. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:20:58 2. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:24:32 3. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:28:04 4. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:31:37 # Details: Enable function raw3215_write() to handle tab expansion and newlines and feed it with input not larger than the console buffer of 65536 bytes. Function raw3125_putchar() just forwards its character for output to raw3215_write(). This moves tab to blank conversion to one function raw3215_write() which also does call raw3215_make_room() to wait for enough free buffer space. Function handle_write() loops over all its input and segments input into chunks of console buffer size (should the input be larger). Rework tab expansion handling logic to avoid code duplication. Signed-off-by: Thomas Richter <tmricht@linux.ibm.com> Acked-by: Peter Oberparleiter <oberpar@linux.ibm.com> Acked-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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Thomas Richter authored
The functions con3215_write() and tty3215_write() have nearly identical function bodies and a slightly different function prototype. Create function handle_write() to handle the common function body and maintain the function prototypes. Signed-off-by: Thomas Richter <tmricht@linux.ibm.com> Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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- 23 Oct, 2022 8 commits
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Linus Torvalds authored
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git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds authored
Pull kvm fixes from Paolo Bonzini: "RISC-V: - Fix compilation without RISCV_ISA_ZICBOM - Fix kvm_riscv_vcpu_timer_pending() for Sstc ARM: - Fix a bug preventing restoring an ITS containing mappings for very large and very sparse device topology - Work around a relocation handling error when compiling the nVHE object with profile optimisation - Fix for stage-2 invalidation holding the VM MMU lock for too long by limiting the walk to the largest block mapping size - Enable stack protection and branch profiling for VHE - Two selftest fixes x86: - add compat implementation for KVM_X86_SET_MSR_FILTER ioctl selftests: - synchronize includes between include/uapi and tools/include/uapi" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: tools: include: sync include/api/linux/kvm.h KVM: x86: Add compat handler for KVM_X86_SET_MSR_FILTER KVM: x86: Copy filter arg outside kvm_vm_ioctl_set_msr_filter() kvm: Add support for arch compat vm ioctls RISC-V: KVM: Fix kvm_riscv_vcpu_timer_pending() for Sstc RISC-V: Fix compilation without RISCV_ISA_ZICBOM KVM: arm64: vgic: Fix exit condition in scan_its_table() KVM: arm64: nvhe: Fix build with profile optimization KVM: selftests: Fix number of pages for memory slot in memslot_modification_stress_test KVM: arm64: selftests: Fix multiple versions of GIC creation KVM: arm64: Enable stack protection and branch profiling for VHE KVM: arm64: Limit stage2_apply_range() batch size to largest block KVM: arm64: Work out supported block level at compile time
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Jason A. Donenfeld authored
This reverts commit 72a95859. It broke reboots on big-endian MIPS and MIPS64 malta QEMU instances, which use the syscon driver. Little-endian is not effected, which means likely it's important to handle regmap_get_val_endian() in this function after all. Fixes: 72a95859 ("mfd: syscon: Remove repetition of the regmap_get_val_endian()") Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Lee Jones <lee@kernel.org> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Linus Torvalds authored
Commit bfca3dd3 ("kernel/utsname_sysctl.c: print kernel arch") added a new entry to the uts_kern_table[] array, but didn't update the UTS_PROC_xyz enumerators of older entries, breaking anything that used them. Which is admittedly not many cases: it's really just the two uses of uts_proc_notify() in kernel/sys.c. But apparently journald-systemd actually uses this to detect hostname changes. Reported-by: Torsten Hilbrich <torsten.hilbrich@secunet.com> Fixes: bfca3dd3 ("kernel/utsname_sysctl.c: print kernel arch") Link: https://lore.kernel.org/lkml/0c2b92a6-0f25-9538-178f-eee3b06da23f@secunet.com/ Link: https://linux-regtracking.leemhuis.info/regzbot/regression/0c2b92a6-0f25-9538-178f-eee3b06da23f@secunet.com/ Cc: Petr Vorel <pvorel@suse.cz> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull perf fixes from Borislav Petkov: - Fix raw data handling when perf events are used in bpf - Rework how SIGTRAPs get delivered to events to address a bunch of problems with it. Add a selftest for that too * tag 'perf_urgent_for_v6.1_rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: bpf: Fix sample_flags for bpf_perf_event_output selftests/perf_events: Add a SIGTRAP stress test with disables perf: Fix missing SIGTRAPs
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull scheduler fixes from Borislav Petkov: - Adjust code to not trip up CFI - Fix sched group cookie matching * tag 'sched_urgent_for_v6.1_rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: sched: Introduce struct balance_callback to avoid CFI mismatches sched/core: Fix comparison in sched_group_cookie_match()
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull objtool fix from Borislav Petkov: - Fix ORC stack unwinding when GCOV is enabled * tag 'objtool_urgent_for_v6.1_rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/unwind/orc: Fix unreliable stack dump with gcov
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull x86 fixes from Borislav Petkov: "As usually the case, right after a major release, the tip urgent branches accumulate a couple more fixes than normal. And here is the x86, a bit bigger, urgent pile. - Use the correct CPU capability clearing function on the error path in Intel perf LBR - A CFI fix to ftrace along with a simplification - Adjust handling of zero capacity bit mask for resctrl cache allocation on AMD - A fix to the AMD microcode loader to attempt patch application on every logical thread - A couple of topology fixes to handle CPUID leaf 0x1f enumeration info properly - Drop a -mabi=ms compiler option check as both compilers support it now anyway - A couple of fixes to how the initial, statically allocated FPU buffer state is setup and its interaction with dynamic states at runtime" * tag 'x86_urgent_for_v6.0_rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/fpu: Fix copy_xstate_to_uabi() to copy init states correctly perf/x86/intel/lbr: Use setup_clear_cpu_cap() instead of clear_cpu_cap() ftrace,kcfi: Separate ftrace_stub() and ftrace_stub_graph() x86/ftrace: Remove ftrace_epilogue() x86/resctrl: Fix min_cbm_bits for AMD x86/microcode/AMD: Apply the patch early on every logical thread x86/topology: Fix duplicated core ID within a package x86/topology: Fix multiple packages shown on a single-package system hwmon/coretemp: Handle large core ID value x86/Kconfig: Drop check for -mabi=ms for CONFIG_EFI_STUB x86/fpu: Exclude dynamic states from init_fpstate x86/fpu: Fix the init_fpstate size check with the actual size x86/fpu: Configure init_fpstate attributes orderly
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