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2022-12-19Merge tag 'iommu-updates-v6.2' of ↵Linus Torvalds1-2/+3
git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu Pull iommu updates from Joerg Roedel: "Core code: - map/unmap_pages() cleanup - SVA and IOPF refactoring - Clean up and document return codes from device/domain attachment AMD driver: - Rework and extend parsing code for ivrs_ioapic, ivrs_hpet and ivrs_acpihid command line options - Some smaller cleanups Intel driver: - Blocking domain support - Cleanups S390 driver: - Fixes and improvements for attach and aperture handling PAMU driver: - Resource leak fix and cleanup Rockchip driver: - Page table permission bit fix Mediatek driver: - Improve safety from invalid dts input - Smaller fixes and improvements Exynos driver: - Fix driver initialization sequence Sun50i driver: - Remove IOMMU_DOMAIN_IDENTITY as it has not been working forever - Various other fixes" * tag 'iommu-updates-v6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (74 commits) iommu/mediatek: Fix forever loop in error handling iommu/mediatek: Fix crash on isr after kexec() iommu/sun50i: Remove IOMMU_DOMAIN_IDENTITY iommu/amd: Fix typo in macro parameter name iommu/mediatek: Remove unused "mapping" member from mtk_iommu_data iommu/mediatek: Improve safety for mediatek,smi property in larb nodes iommu/mediatek: Validate number of phandles associated with "mediatek,larbs" iommu/mediatek: Add error path for loop of mm_dts_parse iommu/mediatek: Use component_match_add iommu/mediatek: Add platform_device_put for recovering the device refcnt iommu/fsl_pamu: Fix resource leak in fsl_pamu_probe() iommu/vt-d: Use real field for indication of first level iommu/vt-d: Remove unnecessary domain_context_mapped() iommu/vt-d: Rename domain_add_dev_info() iommu/vt-d: Rename iommu_disable_dev_iotlb() iommu/vt-d: Add blocking domain support iommu/vt-d: Add device_block_translation() helper iommu/vt-d: Allocate pasid table in device probe path iommu/amd: Check return value of mmu_notifier_register() iommu/amd: Fix pci device refcount leak in ppr_notifier() ...
2022-12-15Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds4-5/+24
Pull kvm updates from Paolo Bonzini: "ARM64: - Enable the per-vcpu dirty-ring tracking mechanism, together with an option to keep the good old dirty log around for pages that are dirtied by something other than a vcpu. - Switch to the relaxed parallel fault handling, using RCU to delay page table reclaim and giving better performance under load. - Relax the MTE ABI, allowing a VMM to use the MAP_SHARED mapping option, which multi-process VMMs such as crosvm rely on (see merge commit 382b5b87a97d: "Fix a number of issues with MTE, such as races on the tags being initialised vs the PG_mte_tagged flag as well as the lack of support for VM_SHARED when KVM is involved. Patches from Catalin Marinas and Peter Collingbourne"). - Merge the pKVM shadow vcpu state tracking that allows the hypervisor to have its own view of a vcpu, keeping that state private. - Add support for the PMUv3p5 architecture revision, bringing support for 64bit counters on systems that support it, and fix the no-quite-compliant CHAIN-ed counter support for the machines that actually exist out there. - Fix a handful of minor issues around 52bit VA/PA support (64kB pages only) as a prefix of the oncoming support for 4kB and 16kB pages. - Pick a small set of documentation and spelling fixes, because no good merge window would be complete without those. s390: - Second batch of the lazy destroy patches - First batch of KVM changes for kernel virtual != physical address support - Removal of a unused function x86: - Allow compiling out SMM support - Cleanup and documentation of SMM state save area format - Preserve interrupt shadow in SMM state save area - Respond to generic signals during slow page faults - Fixes and optimizations for the non-executable huge page errata fix. - Reprogram all performance counters on PMU filter change - Cleanups to Hyper-V emulation and tests - Process Hyper-V TLB flushes from a nested guest (i.e. from a L2 guest running on top of a L1 Hyper-V hypervisor) - Advertise several new Intel features - x86 Xen-for-KVM: - Allow the Xen runstate information to cross a page boundary - Allow XEN_RUNSTATE_UPDATE flag behaviour to be configured - Add support for 32-bit guests in SCHEDOP_poll - Notable x86 fixes and cleanups: - One-off fixes for various emulation flows (SGX, VMXON, NRIPS=0). - Reinstate IBPB on emulated VM-Exit that was incorrectly dropped a few years back when eliminating unnecessary barriers when switching between vmcs01 and vmcs02. - Clean up vmread_error_trampoline() to make it more obvious that params must be passed on the stack, even for x86-64. - Let userspace set all supported bits in MSR_IA32_FEAT_CTL irrespective of the current guest CPUID. - Fudge around a race with TSC refinement that results in KVM incorrectly thinking a guest needs TSC scaling when running on a CPU with a constant TSC, but no hardware-enumerated TSC frequency. - Advertise (on AMD) that the SMM_CTL MSR is not supported - Remove unnecessary exports Generic: - Support for responding to signals during page faults; introduces new FOLL_INTERRUPTIBLE flag that was reviewed by mm folks Selftests: - Fix an inverted check in the access tracking perf test, and restore support for asserting that there aren't too many idle pages when running on bare metal. - Fix build errors that occur in certain setups (unsure exactly what is unique about the problematic setup) due to glibc overriding static_assert() to a variant that requires a custom message. - Introduce actual atomics for clear/set_bit() in selftests - Add support for pinning vCPUs in dirty_log_perf_test. - Rename the so called "perf_util" framework to "memstress". - Add a lightweight psuedo RNG for guest use, and use it to randomize the access pattern and write vs. read percentage in the memstress tests. - Add a common ucall implementation; code dedup and pre-work for running SEV (and beyond) guests in selftests. - Provide a common constructor and arch hook, which will eventually be used by x86 to automatically select the right hypercall (AMD vs. Intel). - A bunch of added/enabled/fixed selftests for ARM64, covering memslots, breakpoints, stage-2 faults and access tracking. - x86-specific selftest changes: - Clean up x86's page table management. - Clean up and enhance the "smaller maxphyaddr" test, and add a related test to cover generic emulation failure. - Clean up the nEPT support checks. - Add X86_PROPERTY_* framework to retrieve multi-bit CPUID values. - Fix an ordering issue in the AMX test introduced by recent conversions to use kvm_cpu_has(), and harden the code to guard against similar bugs in the future. Anything that tiggers caching of KVM's supported CPUID, kvm_cpu_has() in this case, effectively hides opt-in XSAVE features if the caching occurs before the test opts in via prctl(). Documentation: - Remove deleted ioctls from documentation - Clean up the docs for the x86 MSR filter. - Various fixes" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (361 commits) KVM: x86: Add proper ReST tables for userspace MSR exits/flags KVM: selftests: Allocate ucall pool from MEM_REGION_DATA KVM: arm64: selftests: Align VA space allocator with TTBR0 KVM: arm64: Fix benign bug with incorrect use of VA_BITS KVM: arm64: PMU: Fix period computation for 64bit counters with 32bit overflow KVM: x86: Advertise that the SMM_CTL MSR is not supported KVM: x86: remove unnecessary exports KVM: selftests: Fix spelling mistake "probabalistic" -> "probabilistic" tools: KVM: selftests: Convert clear/set_bit() to actual atomics tools: Drop "atomic_" prefix from atomic test_and_set_bit() tools: Drop conflicting non-atomic test_and_{clear,set}_bit() helpers KVM: selftests: Use non-atomic clear/set bit helpers in KVM tests perf tools: Use dedicated non-atomic clear/set bit helpers tools: Take @bit as an "unsigned long" in {clear,set}_bit() helpers KVM: arm64: selftests: Enable single-step without a "full" ucall() KVM: x86: fix APICv/x2AVIC disabled when vm reboot by itself KVM: Remove stale comment about KVM_REQ_UNHALT KVM: Add missing arch for KVM_CREATE_DEVICE and KVM_{SET,GET}_DEVICE_ATTR KVM: Reference to kvm_userspace_memory_region in doc and comments KVM: Delete all references to removed KVM_SET_MEMORY_ALIAS ioctl ...
2022-12-13Merge tag 'mm-stable-2022-12-13' of ↵Linus Torvalds2-5/+8
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull MM updates from Andrew Morton: - More userfaultfs work from Peter Xu - Several convert-to-folios series from Sidhartha Kumar and Huang Ying - Some filemap cleanups from Vishal Moola - David Hildenbrand added the ability to selftest anon memory COW handling - Some cpuset simplifications from Liu Shixin - Addition of vmalloc tracing support by Uladzislau Rezki - Some pagecache folioifications and simplifications from Matthew Wilcox - A pagemap cleanup from Kefeng Wang: we have VM_ACCESS_FLAGS, so use it - Miguel Ojeda contributed some cleanups for our use of the __no_sanitize_thread__ gcc keyword. This series should have been in the non-MM tree, my bad - Naoya Horiguchi improved the interaction between memory poisoning and memory section removal for huge pages - DAMON cleanups and tuneups from SeongJae Park - Tony Luck fixed the handling of COW faults against poisoned pages - Peter Xu utilized the PTE marker code for handling swapin errors - Hugh Dickins reworked compound page mapcount handling, simplifying it and making it more efficient - Removal of the autonuma savedwrite infrastructure from Nadav Amit and David Hildenbrand - zram support for multiple compression streams from Sergey Senozhatsky - David Hildenbrand reworked the GUP code's R/O long-term pinning so that drivers no longer need to use the FOLL_FORCE workaround which didn't work very well anyway - Mel Gorman altered the page allocator so that local IRQs can remnain enabled during per-cpu page allocations - Vishal Moola removed the try_to_release_page() wrapper - Stefan Roesch added some per-BDI sysfs tunables which are used to prevent network block devices from dirtying excessive amounts of pagecache - David Hildenbrand did some cleanup and repair work on KSM COW breaking - Nhat Pham and Johannes Weiner have implemented writeback in zswap's zsmalloc backend - Brian Foster has fixed a longstanding corner-case oddity in file[map]_write_and_wait_range() - sparse-vmemmap changes for MIPS, LoongArch and NIOS2 from Feiyang Chen - Shiyang Ruan has done some work on fsdax, to make its reflink mode work better under xfstests. Better, but still not perfect - Christoph Hellwig has removed the .writepage() method from several filesystems. They only need .writepages() - Yosry Ahmed wrote a series which fixes the memcg reclaim target beancounting - David Hildenbrand has fixed some of our MM selftests for 32-bit machines - Many singleton patches, as usual * tag 'mm-stable-2022-12-13' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (313 commits) mm/hugetlb: set head flag before setting compound_order in __prep_compound_gigantic_folio mm: mmu_gather: allow more than one batch of delayed rmaps mm: fix typo in struct pglist_data code comment kmsan: fix memcpy tests mm: add cond_resched() in swapin_walk_pmd_entry() mm: do not show fs mm pc for VM_LOCKONFAULT pages selftests/vm: ksm_functional_tests: fixes for 32bit selftests/vm: cow: fix compile warning on 32bit selftests/vm: madv_populate: fix missing MADV_POPULATE_(READ|WRITE) definitions mm/gup_test: fix PIN_LONGTERM_TEST_READ with highmem mm,thp,rmap: fix races between updates of subpages_mapcount mm: memcg: fix swapcached stat accounting mm: add nodes= arg to memory.reclaim mm: disable top-tier fallback to reclaim on proactive reclaim selftests: cgroup: make sure reclaim target memcg is unprotected selftests: cgroup: refactor proactive reclaim code to reclaim_until() mm: memcg: fix stale protection of reclaim target memcg mm/mmap: properly unaccount memory on mas_preallocate() failure omfs: remove ->writepage jfs: remove ->writepage ...
2022-12-12Merge tag 's390-6.2-1' of ↵Linus Torvalds10-712/+713
git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux Pull s390 updates from Alexander Gordeev: - Factor out handle_write() function and simplify 3215 console write operation - When 3170 terminal emulator is connected to the 3215 console driver the boot time could be very long due to limited buffer space or missing operator input. Add con3215_drop command line parameter and con3215_drop sysfs attribute file to instruct the kernel drop console data when such conditions are met - Fix white space errors in 3215 console driver - Move enum paiext_mode definition to a header file and rename it to paievt_mode to indicate this is now used for several events. Rename PAI_MODE_COUNTER to PAI_MODE_COUNTING to make consistent with PAI_MODE_SAMPLING - Simplify the logic of PMU pai_crypto mapped buffer reference counter and make it consistent with PMU pai_ext - Rename PMU pai_crypto mapped buffer structure member users to active_events to make it consistent with PMU pai_ext - Enable HUGETLB_PAGE_OPTIMIZE_VMEMMAP configuration option. This results in saving of 12K per 1M hugetlb page (~1.2%) and 32764K per 2G hugetlb page (~1.6%) - Use generic serial.h, bugs.h, shmparam.h and vga.h header files and scrap s390-specific versions - The generic percpu setup code does not expect the s390-like implementation and emits a warning. To get rid of that warning and provide sane CPU-to-node and CPU-to-CPU distance mappings implementat a minimal version of setup_per_cpu_areas() - Use kstrtobool() instead of strtobool() for re-IPL sysfs device attributes - Avoid unnecessary lookup of a pointer to MSI descriptor when setting IRQ affinity for a PCI device - Get rid of "an incompatible function type cast" warning by changing debug_sprintf_format_fn() function prototype so it matches the debug_format_proc_t function type - Remove unused info_blk_hdr__pcpus() and get_page_state() functions - Get rid of clang "unused unused insn cache ops function" warning by moving s390_insn definition to a private header - Get rid of clang "unused function" warning by making function raw3270_state_final() only available if CONFIG_TN3270_CONSOLE is enabled - Use kstrobool() to parse sclp_con_drop parameter to make it identical to the con3215_drop parameter and allow passing values like "yes" and "true" - Use sysfs_emit() for all SCLP sysfs show functions, which is the current standard way to generate output strings - Make SCLP con_drop sysfs attribute also writable and allow to change its value during runtime. This makes SCLP console drop handling consistent with the 3215 device driver - Virtual and physical addresses are indentical on s390. However, there is still a confusion when pointers are directly casted to physical addresses or vice versa. Use correct address converters virt_to_phys() and phys_to_virt() for s390 channel IO drivers - Support for power managemant has been removed from s390 since quite some time. Remove unused power managemant code from the appldata device driver - Allow memory tools like KASAN see memory accesses from the checksum code. Switch to GENERIC_CSUM if KASAN is enabled, just like x86 does - Add support of ECKD DASDs disks so it could be used as boot and dump devices - Follow checkpatch recommendations and use octal values instead of S_IRUGO and S_IWUSR for dump device attributes in sysfs - Changes to vx-insn.h do not cause a recompile of C files that use asm(".include \"asm/vx-insn.h\"\n") magic to access vector instruction macros from inline assemblies. Add wrapper include header file to avoid this problem - Use vector instruction macros instead of byte patterns to increase register validation routine readability - The current machine check register validation handling does not take into account various scenarios and might lead to killing a wrong user process or potentially ignore corrupted FPU registers. Simplify logic of the machine check handler and stop the whole machine if the previous context was kerenel mode. If the previous context was user mode, kill the current task - Introduce sclp_emergency_printk() function which can be used to emit a message in emergency cases. It is supposed to be used in cases where regular console device drivers may not work anymore, e.g. unrecoverable machine checks Keep the early Service-Call Control Block so it can also be used after initdata has been freed to allow sclp_emergency_printk() implementation - In case a system will be stopped because of an unrecoverable machine check error print the machine check interruption code to give a hint of what went wrong - Move storage error checking from the assembly entry code to C in order to simplify machine check handling. Enter the handler with DAT turned on, which simplifies the entry code even more - The machine check extended save areas are allocated using a private "nmi_save_areas" slab cache which guarantees a required power-of-two alignment. Get rid of that cache in favour of kmalloc() * tag 's390-6.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (38 commits) s390/nmi: get rid of private slab cache s390/nmi: move storage error checking back to C, enter with DAT on s390/nmi: print machine check interruption code before stopping system s390/sclp: introduce sclp_emergency_printk() s390/sclp: keep sclp_early_sccb s390/nmi: rework register validation handling s390/nmi: use vector instruction macros instead of byte patterns s390/vx: add vx-insn.h wrapper include file s390/ipl: use octal values instead of S_* macros s390/ipl: add eckd dump support s390/ipl: add eckd support vfio/ccw: identify CCW data addresses as physical vfio/ccw: sort out physical vs virtual pointers usage s390/checksum: support GENERIC_CSUM, enable it for KASAN s390/appldata: remove power management callbacks s390/cio: sort out physical vs virtual pointers usage s390/sclp: allow to change sclp_console_drop during runtime s390/sclp: convert to use sysfs_emit() s390/sclp: use kstrobool() to parse sclp_con_drop parameter s390/3270: make raw3270_state_final() depend on CONFIG_TN3270_CONSOLE ...
2022-12-12Merge tag 'arm64-upstream' of ↵Linus Torvalds1-3/+26
git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull arm64 updates from Will Deacon: "The highlights this time are support for dynamically enabling and disabling Clang's Shadow Call Stack at boot and a long-awaited optimisation to the way in which we handle the SVE register state on system call entry to avoid taking unnecessary traps from userspace. Summary: ACPI: - Enable FPDT support for boot-time profiling - Fix CPU PMU probing to work better with PREEMPT_RT - Update SMMUv3 MSI DeviceID parsing to latest IORT spec - APMT support for probing Arm CoreSight PMU devices CPU features: - Advertise new SVE instructions (v2.1) - Advertise range prefetch instruction - Advertise CSSC ("Common Short Sequence Compression") scalar instructions, adding things like min, max, abs, popcount - Enable DIT (Data Independent Timing) when running in the kernel - More conversion of system register fields over to the generated header CPU misfeatures: - Workaround for Cortex-A715 erratum #2645198 Dynamic SCS: - Support for dynamic shadow call stacks to allow switching at runtime between Clang's SCS implementation and the CPU's pointer authentication feature when it is supported (complete with scary DWARF parser!) Tracing and debug: - Remove static ftrace in favour of, err, dynamic ftrace! - Seperate 'struct ftrace_regs' from 'struct pt_regs' in core ftrace and existing arch code - Introduce and implement FTRACE_WITH_ARGS on arm64 to replace the old FTRACE_WITH_REGS - Extend 'crashkernel=' parameter with default value and fallback to placement above 4G physical if initial (low) allocation fails SVE: - Optimisation to avoid disabling SVE unconditionally on syscall entry and just zeroing the non-shared state on return instead Exceptions: - Rework of undefined instruction handling to avoid serialisation on global lock (this includes emulation of user accesses to the ID registers) Perf and PMU: - Support for TLP filters in Hisilicon's PCIe PMU device - Support for the DDR PMU present in Amlogic Meson G12 SoCs - Support for the terribly-named "CoreSight PMU" architecture from Arm (and Nvidia's implementation of said architecture) Misc: - Tighten up our boot protocol for systems with memory above 52 bits physical - Const-ify static keys to satisty jump label asm constraints - Trivial FFA driver cleanups in preparation for v1.1 support - Export the kernel_neon_* APIs as GPL symbols - Harden our instruction generation routines against instrumentation - A bunch of robustness improvements to our arch-specific selftests - Minor cleanups and fixes all over (kbuild, kprobes, kfence, PMU, ...)" * tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (151 commits) arm64: kprobes: Return DBG_HOOK_ERROR if kprobes can not handle a BRK arm64: kprobes: Let arch do_page_fault() fix up page fault in user handler arm64: Prohibit instrumentation on arch_stack_walk() arm64:uprobe fix the uprobe SWBP_INSN in big-endian arm64: alternatives: add __init/__initconst to some functions/variables arm_pmu: Drop redundant armpmu->map_event() in armpmu_event_init() kselftest/arm64: Allow epoll_wait() to return more than one result kselftest/arm64: Don't drain output while spawning children kselftest/arm64: Hold fp-stress children until they're all spawned arm64/sysreg: Remove duplicate definitions from asm/sysreg.h arm64/sysreg: Convert ID_DFR1_EL1 to automatic generation arm64/sysreg: Convert ID_DFR0_EL1 to automatic generation arm64/sysreg: Convert ID_AFR0_EL1 to automatic generation arm64/sysreg: Convert ID_MMFR5_EL1 to automatic generation arm64/sysreg: Convert MVFR2_EL1 to automatic generation arm64/sysreg: Convert MVFR1_EL1 to automatic generation arm64/sysreg: Convert MVFR0_EL1 to automatic generation arm64/sysreg: Convert ID_PFR2_EL1 to automatic generation arm64/sysreg: Convert ID_PFR1_EL1 to automatic generation arm64/sysreg: Convert ID_PFR0_EL1 to automatic generation ...
2022-12-12Merge branches 'arm/allwinner', 'arm/exynos', 'arm/mediatek', ↵Joerg Roedel1-2/+3
'arm/rockchip', 'arm/smmu', 'ppc/pamu', 's390', 'x86/vt-d', 'x86/amd' and 'core' into next
2022-12-06s390/sclp: introduce sclp_emergency_printk()Heiko Carstens1-0/+1
Introduce sclp_emergency_printk() which can be used to emit a message in emergency cases. sclp_emergency_printk() is only supposed to be used in cases where it can be assumed that regular console device drivers may not work anymore. For example this may be the case for unrecoverable machine checks. 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>
2022-12-06s390/vx: add vx-insn.h wrapper include fileHeiko Carstens2-665/+687
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>
2022-12-06s390/ipl: add eckd dump supportSven Schnelle1-0/+2
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>
2022-12-06s390/ipl: add eckd supportSven Schnelle2-0/+10
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>
2022-12-02Merge tag 'mm-hotfixes-stable-2022-12-02' of ↵Linus Torvalds1-0/+1
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull misc hotfixes from Andrew Morton: "15 hotfixes, 11 marked cc:stable. Only three or four of the latter address post-6.0 issues, which is hopefully a sign that things are converging" * tag 'mm-hotfixes-stable-2022-12-02' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: revert "kbuild: fix -Wimplicit-function-declaration in license_is_gpl_compatible" Kconfig.debug: provide a little extra FRAME_WARN leeway when KASAN is enabled drm/amdgpu: temporarily disable broken Clang builds due to blown stack-frame mm/khugepaged: invoke MMU notifiers in shmem/file collapse paths mm/khugepaged: fix GUP-fast interaction by sending IPI mm/khugepaged: take the right locks for page table retraction mm: migrate: fix THP's mapcount on isolation mm: introduce arch_has_hw_nonleaf_pmd_young() mm: add dummy pmd_young() for architectures not having it mm/damon/sysfs: fix wrong empty schemes assumption under online tuning in damon_sysfs_set_schemes() tools/vm/slabinfo-gnuplot: use "grep -E" instead of "egrep" nilfs2: fix NULL pointer dereference in nilfs_palloc_commit_free_entry() hugetlb: don't delete vma_lock in hugetlb MADV_DONTNEED processing madvise: use zap_page_range_single for madvise dontneed mm: replace VM_WARN_ON to pr_warn if the node is offline with __GFP_THISNODE
2022-12-02s390/checksum: support GENERIC_CSUM, enable it for KASANHeiko Carstens1-0/+7
This is the s390 variant of commit d911c67e10b4 ("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>
2022-11-30mm: delay page_remove_rmap() until after the TLB has been flushedLinus Torvalds1-0/+3
When we remove a page table entry, we are very careful to only free the page after we have flushed the TLB, because other CPUs could still be using the page through stale TLB entries until after the flush. However, we have removed the rmap entry for that page early, which means that functions like folio_mkclean() would end up not serializing with the page table lock because the page had already been made invisible to rmap. And that is a problem, because while the TLB entry exists, we could end up with the following situation: (a) one CPU could come in and clean it, never seeing our mapping of the page (b) another CPU could continue to use the stale and dirty TLB entry and continue to write to said page resulting in a page that has been dirtied, but then marked clean again, all while another CPU might have dirtied it some more. End result: possibly lost dirty data. This extends our current TLB gather infrastructure to optionally track a "should I do a delayed page_remove_rmap() for this page after flushing the TLB". It uses the newly introduced 'encoded page pointer' to do that without having to keep separate data around. Note, this is complicated by a couple of issues: - we want to delay the rmap removal, but not past the page table lock, because that simplifies the memcg accounting - only SMP configurations want to delay TLB flushing, since on UP there are obviously no remote TLBs to worry about, and the page table lock means there are no preemption issues either - s390 has its own mmu_gather model that doesn't delay TLB flushing, and as a result also does not want the delayed rmap. As such, we can treat S390 like the UP case and use a common fallback for the "no delays" case. - we can track an enormous number of pages in our mmu_gather structure, with MAX_GATHER_BATCH_COUNT batches of MAX_TABLE_BATCH pages each, all set up to be approximately 10k pending pages. We do not want to have a huge number of batched pages that we then need to check for delayed rmap handling inside the page table lock. Particularly that last point results in a noteworthy detail, where the normal page batch gathering is limited once we have delayed rmaps pending, in such a way that only the last batch (the so-called "active batch") in the mmu_gather structure can have any delayed entries. NOTE! While the "possibly lost dirty data" sounds catastrophic, for this all to happen you need to have a user thread doing either madvise() with MADV_DONTNEED or a full re-mmap() of the area concurrently with another thread continuing to use said mapping. So arguably this is about user space doing crazy things, but from a VM consistency standpoint it's better if we track the dirty bit properly even when user space goes off the rails. [akpm@linux-foundation.org: fix UP build, per Linus] Link: https://lore.kernel.org/all/B88D3073-440A-41C7-95F4-895D3F657EF2@gmail.com/ Link: https://lkml.kernel.org/r/20221109203051.1835763-4-torvalds@linux-foundation.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Hugh Dickins <hughd@google.com> Reported-by: Nadav Amit <nadav.amit@gmail.com> Tested-by: Nadav Amit <nadav.amit@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2022-11-30mm: mmu_gather: prepare to gather encoded page pointers with flagsLinus Torvalds1-3/+5
This is purely a preparatory patch that makes all the data structures ready for encoding flags with the mmu_gather page pointers. The code currently always sets the flag to zero and doesn't use it yet, but now it's tracking the type state along. The next step will be to actually start using it. Link: https://lkml.kernel.org/r/20221109203051.1835763-3-torvalds@linux-foundation.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Hugh Dickins <hughd@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2022-11-30Merge branch 'mm-hotfixes-stable' into mm-stableAndrew Morton1-0/+1
2022-11-30mm: add dummy pmd_young() for architectures not having itJuergen Gross1-0/+1
In order to avoid #ifdeffery add a dummy pmd_young() implementation as a fallback. This is required for the later patch "mm: introduce arch_has_hw_nonleaf_pmd_young()". Link: https://lkml.kernel.org/r/fd3ac3cd-7349-6bbd-890a-71a9454ca0b3@suse.com Signed-off-by: Juergen Gross <jgross@suse.com> Acked-by: Yu Zhao <yuzhao@google.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Sander Eikelenboom <linux@eikelenboom.it> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2022-11-28Merge tag 'kvm-s390-next-6.2-1' of ↵Paolo Bonzini4-5/+24
https://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD - Second batch of the lazy destroy patches - First batch of KVM changes for kernel virtual != physical address support - Removal of a unused function
2022-11-23KVM: s390: pv: support for Destroy fast UVCClaudio Imbrenda1-0/+10
Add support for the Destroy Secure Configuration Fast Ultravisor call, and take advantage of it for asynchronous destroy. When supported, the protected guest is destroyed immediately using the new UVC, leaving only the memory to be cleaned up asynchronously. Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com> Reviewed-by: Nico Boehr <nrb@linux.ibm.com> Reviewed-by: Janosch Frank <frankja@linux.ibm.com> Reviewed-by: Steffen Eiden <seiden@linux.ibm.com> Link: https://lore.kernel.org/r/20221111170632.77622-6-imbrenda@linux.ibm.com Message-Id: <20221111170632.77622-6-imbrenda@linux.ibm.com> Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
2022-11-23KVM: s390: pv: asynchronous destroy for rebootClaudio Imbrenda1-0/+2
Until now, destroying a protected guest was an entirely synchronous operation that could potentially take a very long time, depending on the size of the guest, due to the time needed to clean up the address space from protected pages. This patch implements an asynchronous destroy mechanism, that allows a protected guest to reboot significantly faster than previously. This is achieved by clearing the pages of the old guest in background. In case of reboot, the new guest will be able to run in the same address space almost immediately. The old protected guest is then only destroyed when all of its memory has been destroyed or otherwise made non protected. Two new PV commands are added for the KVM_S390_PV_COMMAND ioctl: KVM_PV_ASYNC_CLEANUP_PREPARE: set aside the current protected VM for later asynchronous teardown. The current KVM VM will then continue immediately as non-protected. If a protected VM had already been set aside for asynchronous teardown, but without starting the teardown process, this call will fail. There can be at most one VM set aside at any time. Once it is set aside, the protected VM only exists in the context of the Ultravisor, it is not associated with the KVM VM anymore. Its protected CPUs have already been destroyed, but not its memory. This command can be issued again immediately after starting KVM_PV_ASYNC_CLEANUP_PERFORM, without having to wait for completion. KVM_PV_ASYNC_CLEANUP_PERFORM: tears down the protected VM previously set aside using KVM_PV_ASYNC_CLEANUP_PREPARE. Ideally the KVM_PV_ASYNC_CLEANUP_PERFORM PV command should be issued by userspace from a separate thread. If a fatal signal is received (or if the process terminates naturally), the command will terminate immediately without completing. All protected VMs whose teardown was interrupted will be put in the need_cleanup list. The rest of the normal KVM teardown process will take care of properly cleaning up all remaining protected VMs, including the ones on the need_cleanup list. Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com> Reviewed-by: Nico Boehr <nrb@linux.ibm.com> Reviewed-by: Janosch Frank <frankja@linux.ibm.com> Reviewed-by: Steffen Eiden <seiden@linux.ibm.com> Link: https://lore.kernel.org/r/20221111170632.77622-2-imbrenda@linux.ibm.com Message-Id: <20221111170632.77622-2-imbrenda@linux.ibm.com> Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
2022-11-19s390/pci: use lock-free I/O translation updatesNiklas Schnelle1-1/+0
I/O translation tables on s390 use 8 byte page table entries and tables which are allocated lazily but only freed when the entire I/O translation table is torn down. Also each IOVA can at any time only translate to one physical address Furthermore I/O table accesses by the IOMMU hardware are cache coherent. With a bit of care we can thus use atomic updates to manipulate the translation table without having to use a global lock at all. This is done analogous to the existing I/O translation table handling code used on Intel and AMD x86 systems. Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com> Link: https://lore.kernel.org/r/20221109142903.4080275-6-schnelle@linux.ibm.com Signed-off-by: Joerg Roedel <jroedel@suse.de>
2022-11-19iommu/s390: Use RCU to allow concurrent domain_list iterationNiklas Schnelle1-0/+1
The s390_domain->devices list is only added to when new devices are attached but is iterated through in read-only fashion for every mapping operation as well as for I/O TLB flushes and thus in performance critical code causing contention on the s390_domain->list_lock. Fortunately such a read-mostly linked list is a standard use case for RCU. This change closely follows the example fpr RCU protected list given in Documentation/RCU/listRCU.rst. Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com> Link: https://lore.kernel.org/r/20221109142903.4080275-4-schnelle@linux.ibm.com Signed-off-by: Joerg Roedel <jroedel@suse.de>
2022-11-19iommu/s390: Make attach succeed even if the device is in error stateNiklas Schnelle1-1/+1
If a zPCI device is in the error state while switching IOMMU domains zpci_register_ioat() will fail and we would end up with the device not attached to any domain. In this state since zdev->dma_table == NULL a reset via zpci_hot_reset_device() would wrongfully re-initialize the device for DMA API usage using zpci_dma_init_device(). As automatic recovery is currently disabled while attached to an IOMMU domain this only affects slot resets triggered through other means but will affect automatic recovery once we switch to using dma-iommu. Additionally with that switch common code expects attaching to the default domain to always work so zpci_register_ioat() should only fail if there is no chance to recover anyway, e.g. if the device has been unplugged. Improve the robustness of attach by specifically looking at the status returned by zpci_mod_fc() to determine if the device is unavailable and in this case simply ignore the error. Once the device is reset zpci_hot_reset_device() will then correctly set the domain's DMA translation tables. Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com> Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com> Link: https://lore.kernel.org/r/20221109142903.4080275-2-schnelle@linux.ibm.com Signed-off-by: Joerg Roedel <jroedel@suse.de>
2022-11-18ftrace: abstract DYNAMIC_FTRACE_WITH_ARGS accessesMark Rutland1-0/+19
In subsequent patches we'll arrange for architectures to have an ftrace_regs which is entirely distinct from pt_regs. In preparation for this, we need to minimize the use of pt_regs to where strictly necessary in the core ftrace code. This patch adds new ftrace_regs_{get,set}_*() helpers which can be used to manipulate ftrace_regs. When CONFIG_HAVE_DYNAMIC_FTRACE_WITH_ARGS=y, these can always be used on any ftrace_regs, and when CONFIG_HAVE_DYNAMIC_FTRACE_WITH_ARGS=n these can be used when regs are available. A new ftrace_regs_has_args(fregs) helper is added which code can use to check when these are usable. Co-developed-by: Florent Revest <revest@chromium.org> Signed-off-by: Florent Revest <revest@chromium.org> Signed-off-by: Mark Rutland <mark.rutland@arm.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Steven Rostedt <rostedt@goodmis.org> Reviewed-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org> Link: https://lore.kernel.org/r/20221103170520.931305-4-mark.rutland@arm.com Signed-off-by: Will Deacon <will@kernel.org>
2022-11-18ftrace: rename ftrace_instruction_pointer_set() -> ↵Mark Rutland1-2/+3
ftrace_regs_set_instruction_pointer() In subsequent patches we'll add a sew of ftrace_regs_{get,set}_*() helpers. In preparation, this patch renames ftrace_instruction_pointer_set() to ftrace_regs_set_instruction_pointer(). There should be no functional change as a result of this patch. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Cc: Florent Revest <revest@chromium.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Steven Rostedt <rostedt@goodmis.org> Reviewed-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org> Link: https://lore.kernel.org/r/20221103170520.931305-3-mark.rutland@arm.com Signed-off-by: Will Deacon <will@kernel.org>
2022-11-18ftrace: pass fregs to arch_ftrace_set_direct_caller()Mark Rutland1-1/+4
In subsequent patches we'll arrange for architectures to have an ftrace_regs which is entirely distinct from pt_regs. In preparation for this, we need to minimize the use of pt_regs to where strictly necessary in the core ftrace code. This patch changes the prototype of arch_ftrace_set_direct_caller() to take ftrace_regs rather than pt_regs, and moves the extraction of the pt_regs into arch_ftrace_set_direct_caller(). On x86, arch_ftrace_set_direct_caller() can be used even when CONFIG_HAVE_DYNAMIC_FTRACE_WITH_ARGS=n, and <linux/ftrace.h> defines struct ftrace_regs. Due to this, it's necessary to define arch_ftrace_set_direct_caller() as a macro to avoid using an incomplete type. I've also moved the body of arch_ftrace_set_direct_caller() after the CONFIG_HAVE_DYNAMIC_FTRACE_WITH_ARGS=y defineidion of struct ftrace_regs. There should be no functional change as a result of this patch. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Cc: Florent Revest <revest@chromium.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Steven Rostedt <rostedt@goodmis.org> Reviewed-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org> Link: https://lore.kernel.org/r/20221103170520.931305-2-mark.rutland@arm.com Signed-off-by: Will Deacon <will@kernel.org>
2022-11-16s390: use generic vga.h header fileHeiko Carstens1-7/+0
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>
2022-11-16s390: use generic shmparam.h header fileHeiko Carstens1-12/+0
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>
2022-11-16s390: use generic bugs.h header fileHeiko Carstens1-21/+0
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>
2022-11-16s390: use generic serial.h header fileHeiko Carstens1-7/+0
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>
2022-11-16s390: avoid using global register for current_stack_pointerVasily Gorbik1-1/+10
Commit 30de14b1884b ("s390: current_stack_pointer shouldn't be a function") made current_stack_pointer a global register variable like on many other architectures. Unfortunately on s390 it uncovers old gcc bug which is fixed only since gcc-9.1 [gcc commit 3ad7fed1cc87 ("S/390: Fix PR89775. Stackpointer save/restore instructions removed")] and backported to gcc-8.4 and later. Due to this bug gcc versions prior to 8.4 generate broken code which leads to stack corruptions. Current minimal gcc version required to build the kernel is declared as 5.1. It is not possible to fix all old gcc versions, so work around this problem by avoiding using global register variable for current_stack_pointer. Fixes: 30de14b1884b ("s390: current_stack_pointer shouldn't be a function") Reviewed-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>
2022-11-08mm: remove kern_addr_valid() completelyKefeng Wang1-2/+0
Most architectures (except arm64/x86/sparc) simply return 1 for kern_addr_valid(), which is only used in read_kcore(), and it calls copy_from_kernel_nofault() which could check whether the address is a valid kernel address. So as there is no need for kern_addr_valid(), let's remove it. Link: https://lkml.kernel.org/r/20221018074014.185687-1-wangkefeng.wang@huawei.com Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> [m68k] Acked-by: Heiko Carstens <hca@linux.ibm.com> [s390] Acked-by: Christoph Hellwig <hch@lst.de> Acked-by: Helge Deller <deller@gmx.de> [parisc] Acked-by: Michael Ellerman <mpe@ellerman.id.au> [powerpc] Acked-by: Guo Ren <guoren@kernel.org> [csky] Acked-by: Catalin Marinas <catalin.marinas@arm.com> [arm64] Cc: Alexander Gordeev <agordeev@linux.ibm.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com> Cc: <aou@eecs.berkeley.edu> Cc: Borislav Petkov <bp@alien8.de> Cc: Christian Borntraeger <borntraeger@linux.ibm.com> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Chris Zankel <chris@zankel.net> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: David S. Miller <davem@davemloft.net> Cc: Dinh Nguyen <dinguyen@kernel.org> Cc: Greg Ungerer <gerg@linux-m68k.org> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huacai Chen <chenhuacai@kernel.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Cc: Johannes Berg <johannes@sipsolutions.net> Cc: Jonas Bonn <jonas@southpole.se> Cc: Matt Turner <mattst88@gmail.com> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Michal Simek <monstr@monstr.eu> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Palmer Dabbelt <palmer@rivosinc.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Richard Henderson <richard.henderson@linaro.org> Cc: Richard Weinberger <richard@nod.at> Cc: Rich Felker <dalias@libc.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Stafford Horne <shorne@gmail.com> Cc: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi> Cc: Sven Schnelle <svens@linux.ibm.com> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Vineet Gupta <vgupta@kernel.org> Cc: Will Deacon <will@kernel.org> Cc: Xuerui Wang <kernel@xen0n.name> Cc: Yoshinori Sato <ysato@users.osdn.me> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2022-11-07s390/mm: fix virtual-physical address confusion for swiotlbNico Boehr1-2/+2
swiotlb passes virtual addresses to set_memory_encrypted() and set_memory_decrypted(), but uv_remove_shared() and uv_set_shared() expect physical addresses. This currently works, because virtual and physical addresses are the same. Add virt_to_phys() to resolve the virtual-physical confusion. Reported-by: Marc Hartmayer <mhartmay@linux.ibm.com> Signed-off-by: Nico Boehr <nrb@linux.ibm.com> Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com> Reviewed-by: Christian Borntraeger <borntraeger@linux.ibm.com> Link: https://lore.kernel.org/r/20221107121221.156274-2-nrb@linux.ibm.com Message-Id: <20221107121221.156274-2-nrb@linux.ibm.com> Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
2022-11-03iommu/s390: Get rid of s390_domain_deviceNiklas Schnelle1-0/+1
The struct s390_domain_device serves the sole purpose as list entry for the devices list of a struct s390_domain. As it contains no additional information besides a list_head and a pointer to the struct zpci_dev we can simplify things and just thread the device list through struct zpci_dev directly. This removes the need to allocate during domain attach and gets rid of one level of indirection during mapping operations. Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com> Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com> Link: https://lore.kernel.org/r/20221025115657.1666860-3-schnelle@linux.ibm.com Signed-off-by: Joerg Roedel <jroedel@suse.de>
2022-10-26s390/futex: add missing EX_TABLE entry to __futex_atomic_op()Heiko Carstens1-1/+2
For some exception types the instruction address points behind the instruction that caused the exception. Take that into account and add the missing exception table entry. Cc: <stable@vger.kernel.org> Reviewed-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
2022-10-26s390/pai: move enum definition to header fileThomas Richter1-0/+6
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>
2022-10-26KVM: s390: sida: sort out physical vs virtual pointers usageNico Boehr1-2/+1
All callers of the sida_origin() macro actually expected a virtual address, so rename it to sida_addr() and hand out a virtual address. At some places, the macro wasn't used, potentially creating problems if the sida size ever becomes nonzero (not currently the case), so let's start using it everywhere now while at it. Signed-off-by: Nico Boehr <nrb@linux.ibm.com> Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com> Link: https://lore.kernel.org/r/20221020143159.294605-5-nrb@linux.ibm.com Message-Id: <20221020143159.294605-5-nrb@linux.ibm.com> Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
2022-10-26KVM: s390: sort out physical vs virtual pointers usageNico Boehr1-0/+1
Fix virtual vs physical address confusion (which currently are the same). Signed-off-by: Nico Boehr <nrb@linux.ibm.com> Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com> Link: https://lore.kernel.org/r/20221020143159.294605-4-nrb@linux.ibm.com Message-Id: <20221020143159.294605-4-nrb@linux.ibm.com> Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
2022-10-26s390/entry: sort out physical vs virtual pointers usage in sie64aNico Boehr2-1/+8
Fix virtual vs physical address confusion (which currently are the same). sie_block is accessed in entry.S and passed it to hardware, which is why both its physical and virtual address are needed. To avoid every caller having to do the virtual-physical conversion, add a new function sie64a() which converts the virtual address to physical. Signed-off-by: Nico Boehr <nrb@linux.ibm.com> Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com> Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com> Link: https://lore.kernel.org/r/20221020143159.294605-3-nrb@linux.ibm.com Message-Id: <20221020143159.294605-3-nrb@linux.ibm.com> Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
2022-10-12Merge tag 'mm-nonmm-stable-2022-10-11' of ↵Linus Torvalds1-3/+0
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull non-MM updates from Andrew Morton: - hfs and hfsplus kmap API modernization (Fabio Francesco) - make crash-kexec work properly when invoked from an NMI-time panic (Valentin Schneider) - ntfs bugfixes (Hawkins Jiawei) - improve IPC msg scalability by replacing atomic_t's with percpu counters (Jiebin Sun) - nilfs2 cleanups (Minghao Chi) - lots of other single patches all over the tree! * tag 'mm-nonmm-stable-2022-10-11' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (71 commits) include/linux/entry-common.h: remove has_signal comment of arch_do_signal_or_restart() prototype proc: test how it holds up with mapping'less process mailmap: update Frank Rowand email address ia64: mca: use strscpy() is more robust and safer init/Kconfig: fix unmet direct dependencies ia64: update config files nilfs2: replace WARN_ONs by nilfs_error for checkpoint acquisition failure fork: remove duplicate included header files init/main.c: remove unnecessary (void*) conversions proc: mark more files as permanent nilfs2: remove the unneeded result variable nilfs2: delete unnecessary checks before brelse() checkpatch: warn for non-standard fixes tag style usr/gen_init_cpio.c: remove unnecessary -1 values from int file ipc/msg: mitigate the lock contention with percpu counter percpu: add percpu_counter_add_local and percpu_counter_sub_local fs/ocfs2: fix repeated words in comments relay: use kvcalloc to alloc page array in relay_alloc_page_array proc: make config PROC_CHILDREN depend on PROC_FS fs: uninline inode_maybe_inc_iversion() ...
2022-10-09Merge tag 's390-6.1-1' of ↵Linus Torvalds11-37/+51
git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux Pull s390 updates from Vasily Gorbik: - Make use of the IBM z16 processor activity instrumentation facility extension to count neural network processor assist operations: add a new PMU device driver so that perf can make use of this. - Rework memcpy_real() to avoid DAT-off mode. - Rework absolute lowcore access code. - Various small fixes and improvements all over the code. * tag 's390-6.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: s390/pci: remove unused bus_next field from struct zpci_dev s390/cio: remove unused ccw_device_force_console() declaration s390/pai: Add support for PAI Extension 1 NNPA counters s390/mm: fix no previous prototype warnings in maccess.c s390/mm: uninline copy_oldmem_kernel() function s390/mm,ptdump: add real memory copy page markers s390/mm: rework memcpy_real() to avoid DAT-off mode s390/dump: save IPL CPU registers once DAT is available s390/pci: convert high_memory to physical address s390/smp,ptdump: add absolute lowcore markers s390/smp: rework absolute lowcore access s390/smp: call smp_reinit_ipl_cpu() before scheduler is available s390/ptdump: add missing amode31 markers s390/mm: split lowcore pages with set_memory_4k() s390/mm: remove unused access parameter from do_fault_error() s390/delay: sync comment within __delay() with reality s390: move from strlcpy with unused retval to strscpy
2022-10-07Merge tag 'tty-6.1-rc1' of ↵Linus Torvalds1-26/+0
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty Pull tty/serial driver updates from Greg KH: "Here is the big set of TTY and Serial driver updates for 6.1-rc1. Lots of cleanups in here, no real new functionality this time around, with the diffstat being that we removed more lines than we added! Included in here are: - termios unification cleanups from Al Viro, it's nice to finally get this work done - tty serial transmit cleanups in various drivers in preparation for more cleanup and unification in future releases (that work was not ready for this release) - n_gsm fixes and updates - ktermios cleanups and code reductions - dt bindings json conversions and updates for new devices - some serial driver updates for new devices - lots of other tiny cleanups and janitorial stuff. Full details in the shortlog. All of these have been in linux-next for a while with no reported issues" * tag 'tty-6.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (102 commits) serial: cpm_uart: Don't request IRQ too early for console port tty: serial: do unlock on a common path in altera_jtaguart_console_putc() tty: serial: unify TX space reads under altera_jtaguart_tx_space() tty: serial: use FIELD_GET() in lqasc_tx_ready() tty: serial: extend lqasc_tx_ready() to lqasc_console_putchar() tty: serial: allow pxa.c to be COMPILE_TESTed serial: stm32: Fix unused-variable warning tty: serial: atmel: Add COMMON_CLK dependency to SERIAL_ATMEL serial: 8250: Fix restoring termios speed after suspend serial: Deassert Transmit Enable on probe in driver-specific way serial: 8250_dma: Convert to use uart_xmit_advance() serial: 8250_omap: Convert to use uart_xmit_advance() MAINTAINERS: Solve warning regarding inexistent atmel-usart binding serial: stm32: Deassert Transmit Enable on ->rs485_config() serial: ar933x: Deassert Transmit Enable on ->rs485_config() tty: serial: atmel: Use FIELD_PREP/FIELD_GET tty: serial: atmel: Make the driver aware of the existence of GCLK tty: serial: atmel: Only divide Clock Divisor if the IP is USART tty: serial: atmel: Separate mode clearing between UART and USART dt-bindings: serial: atmel,at91-usart: Add gclk as a possible USART clock ...
2022-10-07Merge tag 'for-6.1/block-2022-10-03' of git://git.kernel.dk/linuxLinus Torvalds1-0/+5
Pull block updates from Jens Axboe: - NVMe pull requests via Christoph: - handle number of queue changes in the TCP and RDMA drivers (Daniel Wagner) - allow changing the number of queues in nvmet (Daniel Wagner) - also consider host_iface when checking ip options (Daniel Wagner) - don't map pages which can't come from HIGHMEM (Fabio M. De Francesco) - avoid unnecessary flush bios in nvmet (Guixin Liu) - shrink and better pack the nvme_iod structure (Keith Busch) - add comment for unaligned "fake" nqn (Linjun Bao) - print actual source IP address through sysfs "address" attr (Martin Belanger) - various cleanups (Jackie Liu, Wolfram Sang, Genjian Zhang) - handle effects after freeing the request (Keith Busch) - copy firmware_rev on each init (Keith Busch) - restrict management ioctls to admin (Keith Busch) - ensure subsystem reset is single threaded (Keith Busch) - report the actual number of tagset maps in nvme-pci (Keith Busch) - small fabrics authentication fixups (Christoph Hellwig) - add common code for tagset allocation and freeing (Christoph Hellwig) - stop using the request_queue in nvmet (Christoph Hellwig) - set min_align_mask before calculating max_hw_sectors (Rishabh Bhatnagar) - send a rediscover uevent when a persistent discovery controller reconnects (Sagi Grimberg) - misc nvmet-tcp fixes (Varun Prakash, zhenwei pi) - MD pull request via Song: - Various raid5 fix and clean up, by Logan Gunthorpe and David Sloan. - Raid10 performance optimization, by Yu Kuai. - sbitmap wakeup hang fixes (Hugh, Keith, Jan, Yu) - IO scheduler switching quisce fix (Keith) - s390/dasd block driver updates (Stefan) - support for recovery for the ublk driver (ZiyangZhang) - rnbd drivers fixes and updates (Guoqing, Santosh, ye, Christoph) - blk-mq and null_blk map fixes (Bart) - various bcache fixes (Coly, Jilin, Jules) - nbd signal hang fix (Shigeru) - block writeback throttling fix (Yu) - optimize the passthrough mapping handling (me) - prepare block cgroups to being gendisk based (Christoph) - get rid of an old PSI hack in the block layer, moving it to the callers instead where it belongs (Christoph) - blk-throttle fixes and cleanups (Yu) - misc fixes and cleanups (Liu Shixin, Liu Song, Miaohe, Pankaj, Ping-Xiang, Wolfram, Saurabh, Li Jinlin, Li Lei, Lin, Li zeming, Miaohe, Bart, Coly, Gaosheng * tag 'for-6.1/block-2022-10-03' of git://git.kernel.dk/linux: (162 commits) sbitmap: fix lockup while swapping block: add rationale for not using blk_mq_plug() when applicable block: adapt blk_mq_plug() to not plug for writes that require a zone lock s390/dasd: use blk_mq_alloc_disk blk-cgroup: don't update the blkg lookup hint in blkg_conf_prep nvmet: don't look at the request_queue in nvmet_bdev_set_limits nvmet: don't look at the request_queue in nvmet_bdev_zone_mgmt_emulate_all blk-mq: use quiesced elevator switch when reinitializing queues block: replace blk_queue_nowait with bdev_nowait nvme: remove nvme_ctrl_init_connect_q nvme-loop: use the tagset alloc/free helpers nvme-loop: store the generic nvme_ctrl in set->driver_data nvme-loop: initialize sqsize later nvme-fc: use the tagset alloc/free helpers nvme-fc: store the generic nvme_ctrl in set->driver_data nvme-fc: keep ctrl->sqsize in sync with opts->queue_size nvme-rdma: use the tagset alloc/free helpers nvme-rdma: store the generic nvme_ctrl in set->driver_data nvme-tcp: use the tagset alloc/free helpers nvme-tcp: store the generic nvme_ctrl in set->driver_data ...
2022-09-28s390/pci: remove unused bus_next field from struct zpci_devNiklas Schnelle1-1/+0
This field was added in commit 44510d6fa0c0 ("s390/pci: Handling multifunctions") but is an unused remnant of an earlier version where the devices on the virtual bus were connected in a linked list instead of a fixed 256 entry array of pointers. It is also not used for the list of busses as that is threaded through struct zpci_bus not through struct zpci_dev. Reviewed-by: Pierre Morel <pmorel@linux.ibm.com> Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
2022-09-28s390/cio: remove unused ccw_device_force_console() declarationGaosheng Cui1-1/+0
ccw_device_force_console() has been removed by commit 8cc0dcfdc1c0 ("s390/cio: remove pm support from ccw bus driver"), so remove the declaration, too. Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com> Acked-by: Vineeth Vijayan <vneethv@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
2022-09-25Merge 7e2cd21e02b3 ("Merge tag 'tty-6.0-rc7' of ↵Greg Kroah-Hartman1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty") into tty-next We need the tty fixes and api additions in this branch. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-21s390/dasd: suppress generic error messages for PPRC secondary devicesStefan Haberland1-0/+5
Suppress generic command reject messages and dump of sense data for Peer-To-Peer-Remote-Copy (PPRC) secondary errors. If IO is issued on a PPRC secondary device, a specific error message is printed instead. Signed-off-by: Stefan Haberland <sth@linux.ibm.com> Reviewed-by: Jan Hoeppner <hoeppner@linux.ibm.com> Link: https://lore.kernel.org/r/20220920192616.808070-7-sth@linux.ibm.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-09-16s390/pai: Add support for PAI Extension 1 NNPA countersThomas Richter3-3/+10
PMU device driver perf_paiext supports Processor Activity Instrumentation Extension (PAIE1), available with IBM z16: - maps a 512 byte block to lowcore address 0x1508 called PAIE1 control block. - maps a 1024 byte block at PAIE1 control block entry with index 2. - uses control register bit 14 to enable PAIE1 control block lookup. - turn PAIE1 nnpa counting on and off by setting bit 63 in PAIE1 control block entry with index 2. - creates a sample with raw data on each context switch out when at context switch some mapped counters have a value of nonzero. This device driver only supports CPU wide context, no task context is allowed. Support for counting: - one or more counters can be specified using perf stat -e pai_ext/xxx/ where xxx stands for the counter event name. Multiple invocation of this command is possible. The counter names are listed in /sys/devices/pai_ext/events directory. - one special counters can be specified using perf stat -e pai_ext/NNPA_ALL/ which returns the sum of all incremented nnpa counters. - multiple counting events can run in parallel. Support for Sampling: - one event pai_ext/NNPA_ALL/ is reserved for sampling. The event collects data at context switch out and saves them in the ring buffer. - no multiple invocations are possible. The PAIE1 nnpa counter events are system wide. No task context is supported. Therefore some restrictions documented in function paiext_busy() apply. Extend qpaci assembly instruction to query supported memory mapped nnpa counters. It returns the number of counters (no holes allowed in that range). PAIE1 nnpa counter events can not be created when a CPU hot plug add is processed. This means a CPU hot plug add does not get the necessary PAIE1 event to record PAIE1 nnpa counter increments on the newly added CPU. CPU hot plug remove removes the event and terminates the counting of PAIE1 counters immediately. Signed-off-by: Thomas Richter <tmricht@linux.ibm.com> Reviewed-by: Sumanth Korikkar <sumanthk@linux.ibm.com> Reviewed-by: Sven Schnelle <svens@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
2022-09-14s390/mm: uninline copy_oldmem_kernel() functionAlexander Gordeev2-14/+3
Uninline copy_oldmem_kernel() function and make it consistent with a very similar memcpy_real() implementation, by moving to code to crash_dump.c, where it actually belongs. Reviewed-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
2022-09-14s390/mm: rework memcpy_real() to avoid DAT-off modeAlexander Gordeev3-2/+15
Function memcpy_real() is an univeral data mover that does not require DAT mode to be able reading from a physical address. Its advantage is an ability to read from any address, even those for which no kernel virtual mapping exists. Although memcpy_real() is interrupt-safe, there are no handlers that make use of this function. The compiler instrumentation have to be disabled and separate no-DAT stack used to allow execution of the function once DAT mode is disabled. Rework memcpy_real() to overcome these shortcomings. As result, data copying (which is primarily reading out a crashed system memory by a user process) is executed on a regular stack with enabled interrupts. Also, use of memcpy_real_buf swap buffer becomes unnecessary and the swapping is eliminated. The above is achieved by using a fixed virtual address range that spans a single page and remaps that page repeatedly when memcpy_real() is called for a particular physical address. Reviewed-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
2022-09-14s390/dump: save IPL CPU registers once DAT is availableAlexander Gordeev1-1/+2
Function smp_save_dump_cpus() collects CPU state of a crashed system for secondary CPUs and for the IPL CPU very differently. The Signal Processor stop-and-store-status orders are used for the former while Hardware System Area requests and memcpy_real() routine are called for the latter. In addition a system reset is triggered, which pins smp_save_dump_cpus() function call before CPU and device initialization. Move the collection of IPL CPU state to a later stage when DAT becomes available. That is needed to allow a follow-up rework of memcpy_real() routine. Reviewed-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

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