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* kbuild: scripts/gdb: Replace missed $(srctree)/$(src) w/ $(src)Douglas Anderson2024-05-291-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | Recently we went through the source tree and replaced $(srctree)/$(src) w/ $(src). However, the gdb scripts Makefile had a hidden $(srctree)/$(src) that looked like this: $(abspath $(srctree))/$(src) Because we missed that then my installed kernel had symlinks that looked like this: __init__.py -> ${INSTALL_DIR}/$(INSTALL_DIR}/scripts/gdb/linux/__init__.py Let's also replace the midden $(abspath $(srctree))/$(src) with $(src). Now: __init__.py -> $(INSTALL_DIR}/scripts/gdb/linux/__init__.py Fixes: b1992c3772e6 ("kbuild: use $(src) instead of $(srctree)/$(src) for source directory") Signed-off-by: Douglas Anderson <dianders@chromium.org> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
* Merge tag 'mm-nonmm-stable-2024-05-19-11-56' of ↵Linus Torvalds2024-05-193-10/+5
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull non-mm updates from Andrew Morton: "Mainly singleton patches, documented in their respective changelogs. Notable series include: - Some maintenance and performance work for ocfs2 in Heming Zhao's series "improve write IO performance when fragmentation is high". - Some ocfs2 bugfixes from Su Yue in the series "ocfs2 bugs fixes exposed by fstests". - kfifo header rework from Andy Shevchenko in the series "kfifo: Clean up kfifo.h". - GDB script fixes from Florian Rommel in the series "scripts/gdb: Fixes for $lx_current and $lx_per_cpu". - After much discussion, a coding-style update from Barry Song explaining one reason why inline functions are preferred over macros. The series is "codingstyle: avoid unused parameters for a function-like macro"" * tag 'mm-nonmm-stable-2024-05-19-11-56' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (62 commits) fs/proc: fix softlockup in __read_vmcore nilfs2: convert BUG_ON() in nilfs_finish_roll_forward() to WARN_ON() scripts: checkpatch: check unused parameters for function-like macro Documentation: coding-style: ask function-like macros to evaluate parameters nilfs2: use __field_struct() for a bitwise field selftests/kcmp: remove unused open mode nilfs2: remove calls to folio_set_error() and folio_clear_error() kernel/watchdog_perf.c: tidy up kerneldoc watchdog: allow nmi watchdog to use raw perf event watchdog: handle comma separated nmi_watchdog command line nilfs2: make superblock data array index computation sparse friendly squashfs: remove calls to set the folio error flag squashfs: convert squashfs_symlink_read_folio to use folio APIs scripts/gdb: fix detection of current CPU in KGDB scripts/gdb: make get_thread_info accept pointers scripts/gdb: fix parameter handling in $lx_per_cpu scripts/gdb: fix failing KGDB detection during probe kfifo: don't use "proxy" headers media: stih-cec: add missing io.h media: rc: add missing io.h ...
| * scripts/gdb: fix detection of current CPU in KGDBFlorian Rommel2024-05-081-5/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Directly read the current CPU number from the kgdb_active variable. Before, the active CPU was obtained through the current task, which required searching the task list for the pid of GDB's selected thread. Obtaining the pid was buggy: GDB may use selected_thread().ptid[1] (LWPID) instead of .ptid[2] (TID) to store the threads pid; see https://sourceware.org/gdb/current/onlinedocs/gdb.html/Threads-In-Python.html As a result, the detection could return the wrong CPU number, leading to incorrect results for $lx_per_cpu and $lx_current. As a side effect, the patch significantly speeds up $lx_per_cpu and $lx_current in KGDB by avoiding the task-list iteration. Link: https://lkml.kernel.org/r/20240425153501.749966-5-mail@florommel.de Signed-off-by: Florian Rommel <mail@florommel.de> Cc: Andrew Jones <ajones@ventanamicro.com> Cc: Deepak Gupta <debug@rivosinc.com> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> Cc: Palmer Dabbelt <palmer@rivosinc.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/gdb: make get_thread_info accept pointersFlorian Rommel2024-05-081-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | get_thread_info ($lx_thread_info) only accepted a dereferenced task parameter. Passing a pointer to a task_struct (like $lx_per_cpu does with KGDB) threw an exception. With this patch, both (dereferenced values and pointers) are accepted. Before (on x86, KGDB): >>> p $lx_per_cpu(cpu_info) Traceback (most recent call last): File "./scripts/gdb/linux/cpus.py", line 158, in invoke return per_cpu(var_ptr, cpu) ^^^^^^^^^^^^^^^^^^^^^ File "./scripts/gdb/linux/cpus.py", line 42, in per_cpu cpu = get_current_cpu() ^^^^^^^^^^^^^^^^^ File "./scripts/gdb/linux/cpus.py", line 33, in get_current_cpu return tasks.get_thread_info(tasks.get_task_by_pid(tid))['cpu'] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "./scripts/gdb/linux/tasks.py", line 88, in get_thread_info if task.type.fields()[0].type == thread_info_type.get_type(): ~~~~~~~~~~~~~~~~~~^^^ IndexError: list index out of range Link: https://lkml.kernel.org/r/20240425153501.749966-4-mail@florommel.de Signed-off-by: Florian Rommel <mail@florommel.de> Cc: Andrew Jones <ajones@ventanamicro.com> Cc: Deepak Gupta <debug@rivosinc.com> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> Cc: Palmer Dabbelt <palmer@rivosinc.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/gdb: fix parameter handling in $lx_per_cpuFlorian Rommel2024-05-081-3/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Before, the script tried to get the address by constructing a pointer to the parameter (by name). However, since GDB now passes the parameter as a GdbValue, we cannot get its name. Instead, we retrieve the address through GdbValue's address attribute. Before: >>> p $lx_per_cpu(cpu_info) Traceback (most recent call last): File "./scripts/gdb/linux/cpus.py", line 152, in invoke var_ptr = gdb.parse_and_eval("&" + var_name.string()) ^^^^^^^^^^^^^^^^^ gdb.error: Trying to read string with inappropriate type `struct cpuinfo_x86'. Link: https://lkml.kernel.org/r/20240425153501.749966-3-mail@florommel.de Signed-off-by: Florian Rommel <mail@florommel.de> Cc: Andrew Jones <ajones@ventanamicro.com> Cc: Deepak Gupta <debug@rivosinc.com> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> Cc: Palmer Dabbelt <palmer@rivosinc.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/gdb: fix failing KGDB detection during probeFlorian Rommel2024-05-081-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Patch series "scripts/gdb: Fixes for $lx_current and $lx_per_cpu". This series fixes several bugs in the GDB scripts related to the $lx_current and $lx_per_cpu functions. The changes were tested with GDB 10, 11, 12, 13, and 14. Patch 1 fixes false-negative results when probing for KGDB Patch 2 fixes the $lx_per_cpu function, which is currently non-functional in QEMU-GDB and KGDB. Patch 3 fixes an additional bug in $lx_per_cpu that occurs with KGDB. Patch 4 fixes the incorrect detection of the current CPU number in KGDB, which silently breaks $lx_per_cpu and $lx_current. This patch (of 4): The KGDB probe function sometimes failed to detect KGDB for SMP machines as it assumed that task 2 (kthreadd) is running on CPU 0, which is not necessarily the case. Now, the detection is agnostic to kthreadd's CPU. Link: https://lkml.kernel.org/r/20240425153501.749966-1-mail@florommel.de Link: https://lkml.kernel.org/r/20240425153501.749966-2-mail@florommel.de Signed-off-by: Florian Rommel <mail@florommel.de> Cc: Andrew Jones <ajones@ventanamicro.com> Cc: Deepak Gupta <debug@rivosinc.com> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> Cc: Palmer Dabbelt <palmer@rivosinc.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* | Merge tag 'kbuild-v6.10' of ↵Linus Torvalds2024-05-181-1/+1
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kbuild updates from Masahiro Yamada: - Avoid 'constexpr', which is a keyword in C23 - Allow 'dtbs_check' and 'dt_compatible_check' run independently of 'dt_binding_check' - Fix weak references to avoid GOT entries in position-independent code generation - Convert the last use of 'optional' property in arch/sh/Kconfig - Remove support for the 'optional' property in Kconfig - Remove support for Clang's ThinLTO caching, which does not work with the .incbin directive - Change the semantics of $(src) so it always points to the source directory, which fixes Makefile inconsistencies between upstream and downstream - Fix 'make tar-pkg' for RISC-V to produce a consistent package - Provide reasonable default coverage for objtool, sanitizers, and profilers - Remove redundant OBJECT_FILES_NON_STANDARD, KASAN_SANITIZE, etc. - Remove the last use of tristate choice in drivers/rapidio/Kconfig - Various cleanups and fixes in Kconfig * tag 'kbuild-v6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (46 commits) kconfig: use sym_get_choice_menu() in sym_check_prop() rapidio: remove choice for enumeration kconfig: lxdialog: remove initialization with A_NORMAL kconfig: m/nconf: merge two item_add_str() calls kconfig: m/nconf: remove dead code to display value of bool choice kconfig: m/nconf: remove dead code to display children of choice members kconfig: gconf: show checkbox for choice correctly kbuild: use GCOV_PROFILE and KCSAN_SANITIZE in scripts/Makefile.modfinal Makefile: remove redundant tool coverage variables kbuild: provide reasonable defaults for tool coverage modules: Drop the .export_symbol section from the final modules kconfig: use menu_list_for_each_sym() in sym_check_choice_deps() kconfig: use sym_get_choice_menu() in conf_write_defconfig() kconfig: add sym_get_choice_menu() helper kconfig: turn defaults and additional prompt for choice members into error kconfig: turn missing prompt for choice members into error kconfig: turn conf_choice() into void function kconfig: use linked list in sym_set_changed() kconfig: gconf: use MENU_CHANGED instead of SYMBOL_CHANGED kconfig: gconf: remove debug code ...
| * | kbuild: use $(src) instead of $(srctree)/$(src) for source directoryMasahiro Yamada2024-05-101-1/+1
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Kbuild conventionally uses $(obj)/ for generated files, and $(src)/ for checked-in source files. It is merely a convention without any functional difference. In fact, $(obj) and $(src) are exactly the same, as defined in scripts/Makefile.build: src := $(obj) When the kernel is built in a separate output directory, $(src) does not accurately reflect the source directory location. While Kbuild resolves this discrepancy by specifying VPATH=$(srctree) to search for source files, it does not cover all cases. For example, when adding a header search path for local headers, -I$(srctree)/$(src) is typically passed to the compiler. This introduces inconsistency between upstream and downstream Makefiles because $(src) is used instead of $(srctree)/$(src) for the latter. To address this inconsistency, this commit changes the semantics of $(src) so that it always points to the directory in the source tree. Going forward, the variables used in Makefiles will have the following meanings: $(obj) - directory in the object tree $(src) - directory in the source tree (changed by this commit) $(objtree) - the top of the kernel object tree $(srctree) - the top of the kernel source tree Consequently, $(srctree)/$(src) in upstream Makefiles need to be replaced with $(src). Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
* / genirq: Convert kstat_irqs to a structBitao Hu2024-04-121-3/+3
|/ | | | | | | | | | | | | | | The irq_desc::kstat_irqs member is a per-CPU variable of type int, which is only capable of counting. A snapshot mechanism for interrupt statistics will be added soon, which requires an additional variable to store the snapshot. To facilitate expansion, convert kstat_irqs here to a struct containing only the count. Originally-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Bitao Hu <yaoma@linux.alibaba.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/r/20240411074134.30922-2-yaoma@linux.alibaba.com
* Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds2024-03-152-2/+6
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull kvm updates from Paolo Bonzini: "S390: - Changes to FPU handling came in via the main s390 pull request - Only deliver to the guest the SCLP events that userspace has requested - More virtual vs physical address fixes (only a cleanup since virtual and physical address spaces are currently the same) - Fix selftests undefined behavior x86: - Fix a restriction that the guest can't program a PMU event whose encoding matches an architectural event that isn't included in the guest CPUID. The enumeration of an architectural event only says that if a CPU supports an architectural event, then the event can be programmed *using the architectural encoding*. The enumeration does NOT say anything about the encoding when the CPU doesn't report support the event *in general*. It might support it, and it might support it using the same encoding that made it into the architectural PMU spec - Fix a variety of bugs in KVM's emulation of RDPMC (more details on individual commits) and add a selftest to verify KVM correctly emulates RDMPC, counter availability, and a variety of other PMC-related behaviors that depend on guest CPUID and therefore are easier to validate with selftests than with custom guests (aka kvm-unit-tests) - Zero out PMU state on AMD if the virtual PMU is disabled, it does not cause any bug but it wastes time in various cases where KVM would check if a PMC event needs to be synthesized - Optimize triggering of emulated events, with a nice ~10% performance improvement in VM-Exit microbenchmarks when a vPMU is exposed to the guest - Tighten the check for "PMI in guest" to reduce false positives if an NMI arrives in the host while KVM is handling an IRQ VM-Exit - Fix a bug where KVM would report stale/bogus exit qualification information when exiting to userspace with an internal error exit code - Add a VMX flag in /proc/cpuinfo to report 5-level EPT support - Rework TDP MMU root unload, free, and alloc to run with mmu_lock held for read, e.g. to avoid serializing vCPUs when userspace deletes a memslot - Tear down TDP MMU page tables at 4KiB granularity (used to be 1GiB). KVM doesn't support yielding in the middle of processing a zap, and 1GiB granularity resulted in multi-millisecond lags that are quite impolite for CONFIG_PREEMPT kernels - Allocate write-tracking metadata on-demand to avoid the memory overhead when a kernel is built with i915 virtualization support but the workloads use neither shadow paging nor i915 virtualization - Explicitly initialize a variety of on-stack variables in the emulator that triggered KMSAN false positives - Fix the debugregs ABI for 32-bit KVM - Rework the "force immediate exit" code so that vendor code ultimately decides how and when to force the exit, which allowed some optimization for both Intel and AMD - Fix a long-standing bug where kvm_has_noapic_vcpu could be left elevated if vCPU creation ultimately failed, causing extra unnecessary work - Cleanup the logic for checking if the currently loaded vCPU is in-kernel - Harden against underflowing the active mmu_notifier invalidation count, so that "bad" invalidations (usually due to bugs elsehwere in the kernel) are detected earlier and are less likely to hang the kernel x86 Xen emulation: - Overlay pages can now be cached based on host virtual address, instead of guest physical addresses. This removes the need to reconfigure and invalidate the cache if the guest changes the gpa but the underlying host virtual address remains the same - When possible, use a single host TSC value when computing the deadline for Xen timers in order to improve the accuracy of the timer emulation - Inject pending upcall events when the vCPU software-enables its APIC to fix a bug where an upcall can be lost (and to follow Xen's behavior) - Fall back to the slow path instead of warning if "fast" IRQ delivery of Xen events fails, e.g. if the guest has aliased xAPIC IDs RISC-V: - Support exception and interrupt handling in selftests - New self test for RISC-V architectural timer (Sstc extension) - New extension support (Ztso, Zacas) - Support userspace emulation of random number seed CSRs ARM: - Infrastructure for building KVM's trap configuration based on the architectural features (or lack thereof) advertised in the VM's ID registers - Support for mapping vfio-pci BARs as Normal-NC (vaguely similar to x86's WC) at stage-2, improving the performance of interacting with assigned devices that can tolerate it - Conversion of KVM's representation of LPIs to an xarray, utilized to address serialization some of the serialization on the LPI injection path - Support for _architectural_ VHE-only systems, advertised through the absence of FEAT_E2H0 in the CPU's ID register - Miscellaneous cleanups, fixes, and spelling corrections to KVM and selftests LoongArch: - Set reserved bits as zero in CPUCFG - Start SW timer only when vcpu is blocking - Do not restart SW timer when it is expired - Remove unnecessary CSR register saving during enter guest - Misc cleanups and fixes as usual Generic: - Clean up Kconfig by removing CONFIG_HAVE_KVM, which was basically always true on all architectures except MIPS (where Kconfig determines the available depending on CPU capabilities). It is replaced either by an architecture-dependent symbol for MIPS, and IS_ENABLED(CONFIG_KVM) everywhere else - Factor common "select" statements in common code instead of requiring each architecture to specify it - Remove thoroughly obsolete APIs from the uapi headers - Move architecture-dependent stuff to uapi/asm/kvm.h - Always flush the async page fault workqueue when a work item is being removed, especially during vCPU destruction, to ensure that there are no workers running in KVM code when all references to KVM-the-module are gone, i.e. to prevent a very unlikely use-after-free if kvm.ko is unloaded - Grab a reference to the VM's mm_struct in the async #PF worker itself instead of gifting the worker a reference, so that there's no need to remember to *conditionally* clean up after the worker Selftests: - Reduce boilerplate especially when utilize selftest TAP infrastructure - Add basic smoke tests for SEV and SEV-ES, along with a pile of library support for handling private/encrypted/protected memory - Fix benign bugs where tests neglect to close() guest_memfd files" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (246 commits) selftests: kvm: remove meaningless assignments in Makefiles KVM: riscv: selftests: Add Zacas extension to get-reg-list test RISC-V: KVM: Allow Zacas extension for Guest/VM KVM: riscv: selftests: Add Ztso extension to get-reg-list test RISC-V: KVM: Allow Ztso extension for Guest/VM RISC-V: KVM: Forward SEED CSR access to user space KVM: riscv: selftests: Add sstc timer test KVM: riscv: selftests: Change vcpu_has_ext to a common function KVM: riscv: selftests: Add guest helper to get vcpu id KVM: riscv: selftests: Add exception handling support LoongArch: KVM: Remove unnecessary CSR register saving during enter guest LoongArch: KVM: Do not restart SW timer when it is expired LoongArch: KVM: Start SW timer only when vcpu is blocking LoongArch: KVM: Set reserved bits as zero in CPUCFG KVM: selftests: Explicitly close guest_memfd files in some gmem tests KVM: x86/xen: fix recursive deadlock in timer injection KVM: pfncache: simplify locking and make more self-contained KVM: x86/xen: remove WARN_ON_ONCE() with false positives in evtchn delivery KVM: x86/xen: inject vCPU upcall vector when local APIC is enabled KVM: x86/xen: improve accuracy of Xen timers ...
| * x86: replace CONFIG_HAVE_KVM with IS_ENABLED(CONFIG_KVM)Paolo Bonzini2024-02-082-2/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It is more accurate to check if KVM is enabled, instead of having the architecture say so. Architectures always "have" KVM, so for example checking CONFIG_HAVE_KVM in x86 code is pointless, but if KVM is disabled in a specific build, there is no need for support code. Alternatively, many of the #ifdefs could simply be deleted. However, this would add completely dead code. For example, when KVM is disabled, there should not be any posted interrupts, i.e. NOT wiring up the "dummy" handlers and treating IRQs on those vectors as spurious is the right thing to do. Cc: x86@kernel.org Cc: kbingham@kernel.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* | Merge tag 'mm-stable-2024-03-13-20-04' of ↵Linus Torvalds2024-03-141-27/+29
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull MM updates from Andrew Morton: - Sumanth Korikkar has taught s390 to allocate hotplug-time page frames from hotplugged memory rather than only from main memory. Series "implement "memmap on memory" feature on s390". - More folio conversions from Matthew Wilcox in the series "Convert memcontrol charge moving to use folios" "mm: convert mm counter to take a folio" - Chengming Zhou has optimized zswap's rbtree locking, providing significant reductions in system time and modest but measurable reductions in overall runtimes. The series is "mm/zswap: optimize the scalability of zswap rb-tree". - Chengming Zhou has also provided the series "mm/zswap: optimize zswap lru list" which provides measurable runtime benefits in some swap-intensive situations. - And Chengming Zhou further optimizes zswap in the series "mm/zswap: optimize for dynamic zswap_pools". Measured improvements are modest. - zswap cleanups and simplifications from Yosry Ahmed in the series "mm: zswap: simplify zswap_swapoff()". - In the series "Add DAX ABI for memmap_on_memory", Vishal Verma has contributed several DAX cleanups as well as adding a sysfs tunable to control the memmap_on_memory setting when the dax device is hotplugged as system memory. - Johannes Weiner has added the large series "mm: zswap: cleanups", which does that. - More DAMON work from SeongJae Park in the series "mm/damon: make DAMON debugfs interface deprecation unignorable" "selftests/damon: add more tests for core functionalities and corner cases" "Docs/mm/damon: misc readability improvements" "mm/damon: let DAMOS feeds and tame/auto-tune itself" - In the series "mm/mempolicy: weighted interleave mempolicy and sysfs extension" Rakie Kim has developed a new mempolicy interleaving policy wherein we allocate memory across nodes in a weighted fashion rather than uniformly. This is beneficial in heterogeneous memory environments appearing with CXL. - Christophe Leroy has contributed some cleanup and consolidation work against the ARM pagetable dumping code in the series "mm: ptdump: Refactor CONFIG_DEBUG_WX and check_wx_pages debugfs attribute". - Luis Chamberlain has added some additional xarray selftesting in the series "test_xarray: advanced API multi-index tests". - Muhammad Usama Anjum has reworked the selftest code to make its human-readable output conform to the TAP ("Test Anything Protocol") format. Amongst other things, this opens up the use of third-party tools to parse and process out selftesting results. - Ryan Roberts has added fork()-time PTE batching of THP ptes in the series "mm/memory: optimize fork() with PTE-mapped THP". Mainly targeted at arm64, this significantly speeds up fork() when the process has a large number of pte-mapped folios. - David Hildenbrand also gets in on the THP pte batching game in his series "mm/memory: optimize unmap/zap with PTE-mapped THP". It implements batching during munmap() and other pte teardown situations. The microbenchmark improvements are nice. - And in the series "Transparent Contiguous PTEs for User Mappings" Ryan Roberts further utilizes arm's pte's contiguous bit ("contpte mappings"). Kernel build times on arm64 improved nicely. Ryan's series "Address some contpte nits" provides some followup work. - In the series "mm/hugetlb: Restore the reservation" Breno Leitao has fixed an obscure hugetlb race which was causing unnecessary page faults. He has also added a reproducer under the selftest code. - In the series "selftests/mm: Output cleanups for the compaction test", Mark Brown did what the title claims. - Kinsey Ho has added the series "mm/mglru: code cleanup and refactoring". - Even more zswap material from Nhat Pham. The series "fix and extend zswap kselftests" does as claimed. - In the series "Introduce cpu_dcache_is_aliasing() to fix DAX regression" Mathieu Desnoyers has cleaned up and fixed rather a mess in our handling of DAX on archiecctures which have virtually aliasing data caches. The arm architecture is the main beneficiary. - Lokesh Gidra's series "per-vma locks in userfaultfd" provides dramatic improvements in worst-case mmap_lock hold times during certain userfaultfd operations. - Some page_owner enhancements and maintenance work from Oscar Salvador in his series "page_owner: print stacks and their outstanding allocations" "page_owner: Fixup and cleanup" - Uladzislau Rezki has contributed some vmalloc scalability improvements in his series "Mitigate a vmap lock contention". It realizes a 12x improvement for a certain microbenchmark. - Some kexec/crash cleanup work from Baoquan He in the series "Split crash out from kexec and clean up related config items". - Some zsmalloc maintenance work from Chengming Zhou in the series "mm/zsmalloc: fix and optimize objects/page migration" "mm/zsmalloc: some cleanup for get/set_zspage_mapping()" - Zi Yan has taught the MM to perform compaction on folios larger than order=0. This a step along the path to implementaton of the merging of large anonymous folios. The series is named "Enable >0 order folio memory compaction". - Christoph Hellwig has done quite a lot of cleanup work in the pagecache writeback code in his series "convert write_cache_pages() to an iterator". - Some modest hugetlb cleanups and speedups in Vishal Moola's series "Handle hugetlb faults under the VMA lock". - Zi Yan has changed the page splitting code so we can split huge pages into sizes other than order-0 to better utilize large folios. The series is named "Split a folio to any lower order folios". - David Hildenbrand has contributed the series "mm: remove total_mapcount()", a cleanup. - Matthew Wilcox has sought to improve the performance of bulk memory freeing in his series "Rearrange batched folio freeing". - Gang Li's series "hugetlb: parallelize hugetlb page init on boot" provides large improvements in bootup times on large machines which are configured to use large numbers of hugetlb pages. - Matthew Wilcox's series "PageFlags cleanups" does that. - Qi Zheng's series "minor fixes and supplement for ptdesc" does that also. S390 is affected. - Cleanups to our pagemap utility functions from Peter Xu in his series "mm/treewide: Replace pXd_large() with pXd_leaf()". - Nico Pache has fixed a few things with our hugepage selftests in his series "selftests/mm: Improve Hugepage Test Handling in MM Selftests". - Also, of course, many singleton patches to many things. Please see the individual changelogs for details. * tag 'mm-stable-2024-03-13-20-04' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (435 commits) mm/zswap: remove the memcpy if acomp is not sleepable crypto: introduce: acomp_is_async to expose if comp drivers might sleep memtest: use {READ,WRITE}_ONCE in memory scanning mm: prohibit the last subpage from reusing the entire large folio mm: recover pud_leaf() definitions in nopmd case selftests/mm: skip the hugetlb-madvise tests on unmet hugepage requirements selftests/mm: skip uffd hugetlb tests with insufficient hugepages selftests/mm: dont fail testsuite due to a lack of hugepages mm/huge_memory: skip invalid debugfs new_order input for folio split mm/huge_memory: check new folio order when split a folio mm, vmscan: retry kswapd's priority loop with cache_trim_mode off on failure mm: add an explicit smp_wmb() to UFFDIO_CONTINUE mm: fix list corruption in put_pages_list mm: remove folio from deferred split list before uncharging it filemap: avoid unnecessary major faults in filemap_fault() mm,page_owner: drop unnecessary check mm,page_owner: check for null stack_record before bumping its refcount mm: swap: fix race between free_swap_and_cache() and swapoff() mm/treewide: align up pXd_leaf() retval across archs mm/treewide: drop pXd_large() ...
| * | scripts/gdb/vmalloc: fix vmallocinfo errorKuan-Ying Lee2024-02-211-27/+29
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The patch series "Mitigate a vmap lock contention" removes vmap_area_list, which will break the gdb vmallocinfo command: (gdb) lx-vmallocinfo Python Exception <class 'gdb.error'>: No symbol "vmap_area_list" in current context. Error occurred in Python: No symbol "vmap_area_list" in current context. So we can instead use vmap_nodes to iterate all vmallocinfo. Link: https://lkml.kernel.org/r/20240207085856.11190-1-Kuan-Ying.Lee@mediatek.com Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> Cc: Casper Li <casper.li@mediatek.com> Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Cc: Chinwen Chang <chinwen.chang@mediatek.com> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: Qun-Wei Lin <qun-wei.lin@mediatek.com> Cc: Uladzislau Rezki (Sony) <urezki@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* | Merge tag 'asm-generic-6.9' of ↵Linus Torvalds2024-03-122-2/+2
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic Pull asm-generic updates from Arnd Bergmann: "Just two small updates this time: - A series I did to unify the definition of PAGE_SIZE through Kconfig, intended to help with a vdso rework that needs the constant but cannot include the normal kernel headers when building the compat VDSO on arm64 and potentially others - a patch from Yan Zhao to remove the pfn_to_virt() definitions from a couple of architectures after finding they were both incorrect and entirely unused" * tag 'asm-generic-6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: arch: define CONFIG_PAGE_SIZE_*KB on all architectures arch: simplify architecture specific page size configuration arch: consolidate existing CONFIG_PAGE_SIZE_*KB definitions mm: Remove broken pfn_to_virt() on arch csky/hexagon/openrisc
| * | arch: simplify architecture specific page size configurationArnd Bergmann2024-03-062-2/+2
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | arc, arm64, parisc and powerpc all have their own Kconfig symbols in place of the common CONFIG_PAGE_SIZE_4KB symbols. Change these so the common symbols are the ones that are actually used, while leaving the arhcitecture specific ones as the user visible place for configuring it, to avoid breaking user configs. Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu> (powerpc32) Acked-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Helge Deller <deller@gmx.de> # parisc Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
* / scripts/gdb/symbols: fix invalid escape sequence warningAndrew Ballance2024-03-071-1/+1
|/ | | | | | | | | | | | | | | | With python 3.12, '\.' results in this warning SyntaxWarning: invalid escape sequence '\.' Link: https://lkml.kernel.org/r/20240304012507.240380-1-andrewjballance@gmail.com Signed-off-by: Andrew Ballance <andrewjballance@gmail.com> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Koudai Iwahori <koudai@google.com> Cc: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> Cc: Luis Chamberlain <mcgrof@kernel.org> Cc: Pankaj Raghav <p.raghav@samsung.com> Cc: Shuah Khan <skhan@linuxfoundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* Merge tag 'kbuild-v6.8' of ↵Linus Torvalds2024-01-181-12/+3
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kbuild updates from Masahiro Yamada: - Make Kconfig parse the input .config more precisely - Support W=c and W=e options for Kconfig - Set Kconfig int/hex symbols to zero if the 'default' property is missing - Add .editorconfig - Add scripts/git.orderFile - Add a script to detect backward-incompatible changes in UAPI headers - Resolve the symlink passed to O= option properly - Use the user-supplied mtime for all files in the builtin initramfs, which provides better reproducible builds - Fix the direct execution of debian/rules for Debian package builds - Use build ID instead of the .gnu_debuglink section for the Debian dbg package * tag 'kbuild-v6.8' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (53 commits) kbuild: deb-pkg: use debian/<package> for tmpdir kbuild: deb-pkg: move 'make headers' to build-arch kbuild: deb-pkg: do not search for 'scripts' directory under arch/ kbuild: deb-pkg: use build ID instead of debug link for dbg package kbuild: deb-pkg: use more debhelper commands in builddeb kbuild: deb-pkg: remove unneeded '-f $srctree/Makefile' in debian/rules kbuild: deb-pkg: allow to run debian/rules from output directory kbuild: deb-pkg: set DEB_* variables if debian/rules is directly executed kbuild: deb-pkg: squash scripts/package/deb-build-option to debian/rules kbuild: deb-pkg: factor out common Make options in debian/rules kbuild: deb-pkg: hard-code Build-Depends kbuild: deb-pkg: split debian/copyright from the mkdebian script gen_init_cpio: Apply mtime supplied by user to all file types kbuild: resolve symlinks for O= properly docs: dev-tools: Add UAPI checker documentation check-uapi: Introduce check-uapi.sh scripts: Introduce a default git.orderFile kconfig: WERROR unmet symbol dependency Add .editorconfig file for basic formatting kconfig: Use KCONFIG_CONFIG instead of .config ...
| * scripts: clean up IA-64 codeMasahiro Yamada2023-12-031-12/+3
| | | | | | | | | | | | | | | | A little more janitorial work after commit cf8e8658100d ("arch: Remove Itanium (IA-64) architecture"). Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
* | scripts/gdb: remove exception handling and refine print formatKuan-Ying Lee2023-12-102-35/+26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 1. When we crash on a page, we want to check what happened on this page instead of skipping this page by try-except block. Thus, removing the try-except block. 2. Remove redundant comma and print the task name properly. Link: https://lkml.kernel.org/r/20231127070404.4192-4-Kuan-Ying.Lee@mediatek.com Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> Cc: Andrey Konovalov <andreyknvl@google.com> Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Cc: Chinwen Chang <chinwen.chang@mediatek.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Qun-Wei Lin <qun-wei.lin@mediatek.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* | scripts/gdb/stackdepot: rename pool_index to pools_numKuan-Ying Lee2023-12-101-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | After stackdepot evicting support patchset[1], we rename pool_index to pools_num. To avoid from the below issue, we rename consistently in gdb scripts. Python Exception <class 'gdb.error'>: No symbol "pool_index" in current context. Error occurred in Python: No symbol "pool_index" in current context. [1] https://lore.kernel.org/linux-mm/cover.1700502145.git.andreyknvl@google.com/ Link: https://lkml.kernel.org/r/20231129065142.13375-3-Kuan-Ying.Lee@mediatek.com Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com> Cc: Andrey Konovalov <andreyknvl@google.com> Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Cc: Chinwen Chang <chinwen.chang@mediatek.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Qun-Wei Lin <qun-wei.lin@mediatek.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* | scripts/gdb: fix lx-device-list-bus and lx-device-list-classFlorian Fainelli2023-12-061-8/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | After the conversion to bus_to_subsys() and class_to_subsys(), the gdb scripts listing the system buses and classes respectively was broken, fix those by returning the subsys_priv pointer and have the various caller de-reference either the 'bus' or 'class' structure members accordingly. Link: https://lkml.kernel.org/r/20231130043317.174188-1-florian.fainelli@broadcom.com Fixes: 7b884b7f24b4 ("driver core: class.c: convert to only use class_to_subsys") Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Kieran Bingham <kbingham@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* | scripts/gdb/tasks: fix lx-ps command errorKuan-Ying Lee2023-12-061-11/+7
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | Since commit 8e1f385104ac ("kill task_struct->thread_group") remove the thread_group, we will encounter below issue. (gdb) lx-ps TASK PID COMM 0xffff800086503340 0 swapper/0 Python Exception <class 'gdb.error'>: There is no member named thread_group. Error occurred in Python: There is no member named thread_group. We use signal->thread_head to iterate all threads instead. [Kuan-Ying.Lee@mediatek.com: v2] Link: https://lkml.kernel.org/r/20231129065142.13375-2-Kuan-Ying.Lee@mediatek.com Link: https://lkml.kernel.org/r/20231127070404.4192-2-Kuan-Ying.Lee@mediatek.com Fixes: 8e1f385104ac ("kill task_struct->thread_group") Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> Acked-by: Oleg Nesterov <oleg@redhat.com> Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Cc: Chinwen Chang <chinwen.chang@mediatek.com> Cc: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: Qun-Wei Lin <qun-wei.lin@mediatek.com> Cc: Andrey Konovalov <andreyknvl@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* scripts/gdb/vmalloc: disable on no-MMUBen Wolsieffer2023-11-012-2/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | vmap_area does not exist on no-MMU, therefore the GDB scripts fail to load: Traceback (most recent call last): File "<...>/vmlinux-gdb.py", line 51, in <module> import linux.vmalloc File "<...>/scripts/gdb/linux/vmalloc.py", line 14, in <module> vmap_area_ptr_type = vmap_area_type.get_type().pointer() ^^^^^^^^^^^^^^^^^^^^^^^^^ File "<...>/scripts/gdb/linux/utils.py", line 28, in get_type self._type = gdb.lookup_type(self._name) ^^^^^^^^^^^^^^^^^^^^^^^^^^^ gdb.error: No struct type named vmap_area. To fix this, disable the command and add an informative error message if CONFIG_MMU is not defined, following the example of lx-slabinfo. Link: https://lkml.kernel.org/r/20231031202235.2655333-2-ben.wolsieffer@hefring.com Fixes: 852622bf3616 ("scripts/gdb/vmalloc: add vmallocinfo support") Signed-off-by: Ben Wolsieffer <ben.wolsieffer@hefring.com> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* scripts/gdb: fix usage of MOD_TEXT not defined when CONFIG_MODULES=nClément Léger2023-11-011-4/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | MOD_TEXT is only defined if CONFIG_MODULES=y which lead to loading failure of the gdb scripts when kernel is built without CONFIG_MODULES=y: Reading symbols from vmlinux... Traceback (most recent call last): File "/foo/vmlinux-gdb.py", line 25, in <module> import linux.constants File "/foo/scripts/gdb/linux/constants.py", line 14, in <module> LX_MOD_TEXT = gdb.parse_and_eval("MOD_TEXT") ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ gdb.error: No symbol "MOD_TEXT" in current context. Add a conditional check on CONFIG_MODULES to fix this error. Link: https://lkml.kernel.org/r/20231031134848.119391-1-da.gomez@samsung.com Fixes: b4aff7513df3 ("scripts/gdb: use mem instead of core_layout to get the module address") Signed-off-by: Clément Léger <cleger@rivosinc.com> Tested-by: Daniel Gomez <da.gomez@samsung.com> Signed-off-by: Daniel Gomez <da.gomez@samsung.com> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Luis Chamberlain <mcgrof@kernel.org> Cc: Pankaj Raghav <p.raghav@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* scripts/gdb: add lx_current support for riscvDeepak Gupta2023-11-011-0/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | csr_sscratch CSR holds current task_struct address when hart is in user space. Trap handler on entry spills csr_sscratch into "tp" (x2) register and zeroes out csr_sscratch CSR. Trap handler on exit reloads "tp" with expected user mode value and place current task_struct address again in csr_sscratch CSR. This patch assumes "tp" is pointing to task_struct. If value in csr_sscratch is numerically greater than "tp" then it assumes csr_sscratch is correct address of current task_struct. This logic holds when - hart is in user space, "tp" will be less than csr_sscratch. - hart is in kernel space but not in trap handler, "tp" will be more than csr_sscratch (csr_sscratch being equal to 0). - hart is executing trap handler - "tp" is still pointing to user mode but csr_sscratch contains ptr to task_struct. Thus numerically higher. - "tp" is pointing to task_struct but csr_sscratch now contains either 0 or numerically smaller value (transiently holds user mode tp) Link: https://lkml.kernel.org/r/20231026233837.612405-1-debug@rivosinc.com Signed-off-by: Deepak Gupta <debug@rivosinc.com> Reviewed-by: Andrew Jones <ajones@ventanamicro.com> Reviewed-by: Palmer Dabbelt <palmer@rivosinc.com> Acked-by: Palmer Dabbelt <palmer@rivosinc.com> Tested-by: Hsieh-Tseng Shen <woodrow.shen@sifive.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Glenn Washburn <development@efficientek.com> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Jeff Xie <xiehuan09@gmail.com> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Palmer Dabbelt <palmer@rivosinc.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* revert "scripts/gdb/symbols: add specific ko module load command"Andrew Morton2023-09-191-21/+2
| | | | | | | | | | | | | | | | | Revert 11f956538c07 ("scripts/gdb/symbols: add specific ko module load command") due to breakage identified by Johannes Berg in [1]. Fixes: 11f956538c07 ("scripts/gdb/symbols: add specific ko module load command") Reported-by: Johannes Berg <johannes@sipsolutions.net> Closes: https://lkml.kernel.org/r/c44b748307a074d0c250002cdcfe209b8cce93c9.camel@sipsolutions.net [1] Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Cc: Chinwen Chang <chinwen.chang@mediatek.com> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: Qun-Wei Lin <qun-wei.lin@mediatek.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* scripts/gdb/vmalloc: add vmallocinfo supportKuan-Ying Lee2023-08-212-0/+64
| | | | | | | | | | | | | | | | | | | | | | | | | | | This GDB script shows the vmallocinfo for user to analyze the vmalloc memory usage. Example output: 0xffff800008000000-0xffff800008009000 36864 <start_kernel+372> pages=8 vmalloc 0xffff800008009000-0xffff80000800b000 8192 <gicv2m_init_one+400> phys=0x8020000 ioremap 0xffff80000800b000-0xffff80000800d000 8192 <bpf_prog_alloc_no_stats+72> pages=1 vmalloc 0xffff80000800d000-0xffff80000800f000 8192 <bpf_jit_alloc_exec+16> pages=1 vmalloc 0xffff800008010000-0xffff80000ad30000 47316992 <paging_init+452> phys=0x40210000 vmap 0xffff80000ad30000-0xffff80000c1c0000 21561344 <paging_init+556> phys=0x42f30000 vmap 0xffff80000c1c0000-0xffff80000c370000 1769472 <paging_init+592> phys=0x443c0000 vmap 0xffff80000c370000-0xffff80000de90000 28442624 <paging_init+692> phys=0x44570000 vmap 0xffff80000de90000-0xffff80000f4c1000 23269376 <paging_init+788> phys=0x46090000 vmap 0xffff80000f4c1000-0xffff80000f4c3000 8192 <gen_pool_add_owner+112> pages=1 vmalloc 0xffff80000f4c3000-0xffff80000f4c5000 8192 <gen_pool_add_owner+112> pages=1 vmalloc 0xffff80000f4c5000-0xffff80000f4c7000 8192 <gen_pool_add_owner+112> pages=1 vmalloc Link: https://lkml.kernel.org/r/20230808083020.22254-9-Kuan-Ying.Lee@mediatek.com Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Cc: Chinwen Chang <chinwen.chang@mediatek.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: Qun-Wei Lin <qun-wei.lin@mediatek.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* scripts/gdb/slab: add slab supportKuan-Ying Lee2023-08-212-0/+339
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add 'lx-slabinfo' and 'lx-slabtrace' support. This GDB scripts print slabinfo and slabtrace for user to analyze slab memory usage. Example output like below: (gdb) lx-slabinfo Pointer | name | active_objs | num_objs | objsize | objperslab | pagesperslab ------------------ | -------------------- | ------------ | ------------ | -------- | ----------- | ------------- 0xffff0000c59df480 | p9_req_t | 0 | 0 | 280 | 29 | 2 0xffff0000c59df280 | isp1760_qh | 0 | 0 | 160 | 25 | 1 0xffff0000c59df080 | isp1760_qtd | 0 | 0 | 184 | 22 | 1 0xffff0000c59dee80 | isp1760_urb_listite | 0 | 0 | 136 | 30 | 1 0xffff0000c59dec80 | asd_sas_event | 0 | 0 | 256 | 32 | 2 0xffff0000c59dea80 | sas_task | 0 | 0 | 448 | 36 | 4 0xffff0000c59de880 | bio-120 | 18 | 21 | 384 | 21 | 2 0xffff0000c59de680 | io_kiocb | 0 | 0 | 448 | 36 | 4 0xffff0000c59de480 | bfq_io_cq | 0 | 0 | 1504 | 21 | 8 0xffff0000c59de280 | bfq_queue | 0 | 0 | 720 | 22 | 4 0xffff0000c59de080 | mqueue_inode_cache | 1 | 28 | 1152 | 28 | 8 0xffff0000c59dde80 | v9fs_inode_cache | 0 | 0 | 832 | 39 | 8 ... (gdb) lx-slabtrace --cache_name kmalloc-1k 63 <tty_register_device_attr+508> waste=16632/264 age=46856/46871/46888 pid=1 cpus=6, 0xffff800008720240 <__kmem_cache_alloc_node+236>: mov x22, x0 0xffff80000862a4fc <kmalloc_trace+64>: mov x21, x0 0xffff8000095d086c <tty_register_device_attr+508>: mov x19, x0 0xffff8000095d0f98 <tty_register_driver+704>: cmn x0, #0x1, lsl #12 0xffff80000c2677e8 <vty_init+620>: Cannot access memory at address 0xffff80000c2677e8 0xffff80000c265a10 <tty_init+276>: Cannot access memory at address 0xffff80000c265a10 0xffff80000c26d3c4 <chr_dev_init+204>: Cannot access memory at address 0xffff80000c26d3c4 0xffff8000080161d4 <do_one_initcall+176>: mov w21, w0 0xffff80000c1c1b58 <kernel_init_freeable+956>: Cannot access memory at address 0xffff80000c1c1b58 0xffff80000acf1334 <kernel_init+36>: bl 0xffff8000081ac040 <async_synchronize_full> 0xffff800008018d00 <ret_from_fork+16>: mrs x28, sp_el0 (gdb) lx-slabtrace --cache_name kmalloc-1k --free 428 <not-available> age=4294958600 pid=0 cpus=0, Link: https://lkml.kernel.org/r/20230808083020.22254-8-Kuan-Ying.Lee@mediatek.com Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Cc: Chinwen Chang <chinwen.chang@mediatek.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: Qun-Wei Lin <qun-wei.lin@mediatek.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* scripts/gdb/page_owner: add page owner supportKuan-Ying Lee2023-08-212-0/+197
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This GDB script prints page owner information for user to analyze the memory usage or memory corruption issue. Example output from an aarch64 system: (gdb) lx-dump-page-owner --pfn 655360 page_owner tracks the page as allocated Page last allocated via order 0, gfp_mask: 0x8, pid: 1, tgid: 1 ("swapper/0\000\000\000\000\000\000"), ts 1295948880 ns, free_ts 1011852016 ns PFN: 655360, Flags: 0x3fffc0000000000 0xffff8000086ab964 <post_alloc_hook+452>: ldp x19, x20, [sp, #16] 0xffff80000862e4e0 <split_map_pages+344>: cbnz w22, 0xffff80000862e57c <split_map_pages+500> 0xffff8000086370c4 <isolate_freepages_range+556>: mov x0, x27 0xffff8000086bc1cc <alloc_contig_range+808>: mov x24, x0 0xffff80000877d6d8 <cma_alloc+772>: mov w1, w0 0xffff8000082c8d18 <dma_alloc_from_contiguous+104>: ldr x19, [sp, #16] 0xffff8000082ce0e8 <atomic_pool_expand+208>: mov x19, x0 0xffff80000c1e41b4 <__dma_atomic_pool_init+172>: Cannot access memory at address 0xffff80000c1e41b4 0xffff80000c1e4298 <dma_atomic_pool_init+92>: Cannot access memory at address 0xffff80000c1e4298 0xffff8000080161d4 <do_one_initcall+176>: mov w21, w0 0xffff80000c1c1b50 <kernel_init_freeable+952>: Cannot access memory at address 0xffff80000c1c1b50 0xffff80000acf87dc <kernel_init+36>: bl 0xffff8000081ab100 <async_synchronize_full> 0xffff800008018d00 <ret_from_fork+16>: mrs x28, sp_el0 page last free stack trace: 0xffff8000086a6e8c <free_unref_page_prepare+796>: mov w2, w23 0xffff8000086aee1c <free_unref_page+96>: tst w0, #0xff 0xffff8000086af3f8 <__free_pages+292>: ldp x19, x20, [sp, #16] 0xffff80000c1f3214 <init_cma_reserved_pageblock+220>: Cannot access memory at address 0xffff80000c1f3214 0xffff80000c20363c <cma_init_reserved_areas+1284>: Cannot access memory at address 0xffff80000c20363c 0xffff8000080161d4 <do_one_initcall+176>: mov w21, w0 0xffff80000c1c1b50 <kernel_init_freeable+952>: Cannot access memory at address 0xffff80000c1c1b50 0xffff80000acf87dc <kernel_init+36>: bl 0xffff8000081ab100 <async_synchronize_full> 0xffff800008018d00 <ret_from_fork+16>: mrs x28, sp_el0 Link: https://lkml.kernel.org/r/20230808083020.22254-7-Kuan-Ying.Lee@mediatek.com Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Cc: Chinwen Chang <chinwen.chang@mediatek.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: Qun-Wei Lin <qun-wei.lin@mediatek.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* scripts/gdb/stackdepot: add stackdepot supportKuan-Ying Lee2023-08-212-0/+56
| | | | | | | | | | | | | | | Add support for printing the backtrace of stackdepot handle. This is the preparation patch for dumping page_owner, slabtrace usage. Link: https://lkml.kernel.org/r/20230808083020.22254-6-Kuan-Ying.Lee@mediatek.com Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Cc: Chinwen Chang <chinwen.chang@mediatek.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: Qun-Wei Lin <qun-wei.lin@mediatek.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* scripts/gdb/aarch64: add aarch64 page operation helper commands and configsKuan-Ying Lee2023-08-213-203/+624
| | | | | | | | | | | | | | | | | | | | 1. Move page table debugging from mm.py to pgtable.py. 2. Add aarch64 kernel config and memory constants value. 3. Add below aarch64 page operation helper commands. page_to_pfn, page_to_phys, pfn_to_page, page_address, virt_to_phys, sym_to_pfn, pfn_to_kaddr, virt_to_page. 4. Only support CONFIG_SPARSEMEM_VMEMMAP=y now. Link: https://lkml.kernel.org/r/20230808083020.22254-5-Kuan-Ying.Lee@mediatek.com Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Cc: Chinwen Chang <chinwen.chang@mediatek.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: Qun-Wei Lin <qun-wei.lin@mediatek.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* scripts/gdb/utils: add common type usageKuan-Ying Lee2023-08-211-0/+20
| | | | | | | | | | | | | Since we often use 'unsigned long', 'size_t', 'usigned int' and 'struct page', we add these common types to utils. Link: https://lkml.kernel.org/r/20230808083020.22254-4-Kuan-Ying.Lee@mediatek.com Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Cc: Chinwen Chang <chinwen.chang@mediatek.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: Qun-Wei Lin <qun-wei.lin@mediatek.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* scripts/gdb/modules: add get module text supportKuan-Ying Lee2023-08-211-1/+31
| | | | | | | | | | | | | | | | | | | | When we get an text address from coredump and we cannot find this address in vmlinux, it might located in kernel module. We want to know which kernel module it located in. This GDB scripts can help us to find the target kernel module. (gdb) lx-getmod-by-textaddr 0xffff800002d305ac 0xffff800002d305ac is in kasan_test.ko Link: https://lkml.kernel.org/r/20230808083020.22254-3-Kuan-Ying.Lee@mediatek.com Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Cc: Chinwen Chang <chinwen.chang@mediatek.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: Qun-Wei Lin <qun-wei.lin@mediatek.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* scripts/gdb/symbols: add specific ko module load commandKuan-Ying Lee2023-08-211-2/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Patch series "Add GDB memory helper commands", v2. I've created some GDB commands I think useful when I debug some memory issues and kernel module issue. For memory issue, we would like to get slabinfo, slabtrace, page_owner and vmallocinfo to debug the memory issues. For module issue, we would like to query kernel module name when we get a module text address and load module symbol by specific path. Patch 1-2: - Add kernel module related command. Patch 3-5: - Prepares for the memory-related command. Patch 6-8: - Add memory-related commands. This patch (of 8): Add lx-symbols <ko_path> command to support add specific ko module. Example output like below: (gdb) lx-symbols mm/kasan/kasan_test.ko loading @0xffff800002d30000: mm/kasan/kasan_test.ko Link: https://lkml.kernel.org/r/20230808083020.22254-1-Kuan-Ying.Lee@mediatek.com Link: https://lkml.kernel.org/r/20230808083020.22254-2-Kuan-Ying.Lee@mediatek.com Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Cc: Chinwen Chang <chinwen.chang@mediatek.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: Qun-Wei Lin <qun-wei.lin@mediatek.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* scripts/gdb: fix 'lx-lsmod' show the wrong sizeKuan-Ying Lee2023-08-182-3/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 'lsmod' shows total core layout size, so we need to sum up all the sections in core layout in gdb scripts. / # lsmod kasan_test 200704 0 - Live 0xffff80007f640000 Before patch: (gdb) lx-lsmod Address Module Size Used by 0xffff80007f640000 kasan_test 36864 0 After patch: (gdb) lx-lsmod Address Module Size Used by 0xffff80007f640000 kasan_test 200704 0 Link: https://lkml.kernel.org/r/20230710092852.31049-1-Kuan-Ying.Lee@mediatek.com Fixes: b4aff7513df3 ("scripts/gdb: use mem instead of core_layout to get the module address") Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> Reviewed-by: Pankaj Raghav <p.raghav@samsung.com> Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Cc: Chinwen Chang <chinwen.chang@mediatek.com> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Luis Chamberlain <mcgrof@kernel.org> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: Qun-Wei Lin <qun-wei.lin@mediatek.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* scripts/gdb: fix lx-symbols command for arm64 LLVMKoudai Iwahori2023-08-181-7/+10
| | | | | | | | | | | | | | | | lx-symbols assumes that module's .text sections is located at `module->mem[MOD_TEXT].base` and passes it to add-symbol-file command. However, .text section follows after .plt section in modules built by LLVM toolchain for arm64 target. Symbol addresses are skewed in GDB. Fix this issue by using the address of .text section stored in `module->sect_attrs`. Link: https://lkml.kernel.org/r/20230801121052.2475183-1-koudai@google.com Signed-off-by: Koudai Iwahori <koudai@google.com> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Kieran Bingham <kbingham@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* scripts/gdb: fix SB_* constants parsingFlorian Fainelli2023-06-191-6/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | --0000000000009a0c9905fd9173ad Content-Transfer-Encoding: 8bit After f15afbd34d8f ("fs: fix undefined behavior in bit shift for SB_NOUSER") the constants were changed from plain integers which LX_VALUE() can parse to constants using the BIT() macro which causes the following: Reading symbols from build/linux-custom/vmlinux...done. Traceback (most recent call last): File "/home/fainelli/work/buildroot/output/arm64/build/linux-custom/vmlinux-gdb.py", line 25, in <module> import linux.constants File "/home/fainelli/work/buildroot/output/arm64/build/linux-custom/scripts/gdb/linux/constants.py", line 5 LX_SB_RDONLY = ((((1UL))) << (0)) Use LX_GDBPARSED() which does not suffer from that issue. f15afbd34d8f ("fs: fix undefined behavior in bit shift for SB_NOUSER") Link: https://lkml.kernel.org/r/20230607221337.2781730-1-florian.fainelli@broadcom.com Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com> Acked-by: Christian Brauner <brauner@kernel.org> Cc: Hao Ge <gehao@kylinos.cn> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Luis Chamberlain <mcgrof@kernel.org> Cc: Pankaj Raghav <p.raghav@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* Merge tag 'mm-nonmm-stable-2023-04-27-16-01' of ↵Linus Torvalds2023-04-2710-31/+445
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull non-MM updates from Andrew Morton: "Mainly singleton patches all over the place. Series of note are: - updates to scripts/gdb from Glenn Washburn - kexec cleanups from Bjorn Helgaas" * tag 'mm-nonmm-stable-2023-04-27-16-01' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (50 commits) mailmap: add entries for Paul Mackerras libgcc: add forward declarations for generic library routines mailmap: add entry for Oleksandr ocfs2: reduce ioctl stack usage fs/proc: add Kthread flag to /proc/$pid/status ia64: fix an addr to taddr in huge_pte_offset() checkpatch: introduce proper bindings license check epoll: rename global epmutex scripts/gdb: add GDB convenience functions $lx_dentry_name() and $lx_i_dentry() scripts/gdb: create linux/vfs.py for VFS related GDB helpers uapi/linux/const.h: prefer ISO-friendly __typeof__ delayacct: track delays from IRQ/SOFTIRQ scripts/gdb: timerlist: convert int chunks to str scripts/gdb: print interrupts scripts/gdb: raise error with reduced debugging information scripts/gdb: add a Radix Tree Parser lib/rbtree: use '+' instead of '|' for setting color. proc/stat: remove arch_idle_time() checkpatch: check for misuse of the link tags checkpatch: allow Closes tags with links ...
| * scripts/gdb: add GDB convenience functions $lx_dentry_name() and $lx_i_dentry()Glenn Washburn2023-04-181-0/+37
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | $lx_dentry_name() generates a full VFS path from a given dentry pointer, and $lx_i_dentry() returns the dentry pointer associated with the given inode pointer, if there is one. Link: https://lkml.kernel.org/r/c9a5ad8efbfbd2cc6559e082734eed7628f43a16.1677631565.git.development@efficientek.com Signed-off-by: Glenn Washburn <development@efficientek.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Antonio Borneo <antonio.borneo@foss.st.com> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: John Ogness <john.ogness@linutronix.de> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Petr Mladek <pmladek@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/gdb: create linux/vfs.py for VFS related GDB helpersGlenn Washburn2023-04-183-15/+31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Patch series "GDB VFS utils". I've created a couple GDB convenience functions that I found useful when debugging some VFS issues and figure others might find them useful. For instance, they are useful in setting conditional breakpoints on VFS functions where you only care if the dentry path is a certain value. I took the opportunity to create a new "vfs" python module to give VFS related utilities a home. This patch (of 2): This will allow for more VFS specific GDB helpers to be collected in one place. Move utils.dentry_name into the vfs modules. Also a local variable in proc.py was changed from vfs to mnt to prevent a naming collision with the new vfs module. [akpm@linux-foundation.org: add SPDX-License-Identifier] Link: https://lkml.kernel.org/r/cover.1677631565.git.development@efficientek.com Link: https://lkml.kernel.org/r/7bba4c065a8c2c47f1fc5b03a7278005b04db251.1677631565.git.development@efficientek.com Signed-off-by: Glenn Washburn <development@efficientek.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Antonio Borneo <antonio.borneo@foss.st.com> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: John Ogness <john.ogness@linutronix.de> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Petr Mladek <pmladek@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/gdb: timerlist: convert int chunks to strAmjad Ouled-Ameur2023-04-181-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | join() expects strings but integers are given. Convert chunks list to strings before passing it to join() Link: https://lkml.kernel.org/r/20230406221217.1585486-4-f.fainelli@gmail.com Signed-off-by: Amjad Ouled-Ameur <aouledameur@baylibre.com> Signed-by: Florian Fainelli <f.fainelli@gmail.com> Tested-by: Florian Fainelli <f.fainelli@gmail.com> Cc: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/gdb: print interruptsFlorian Fainelli2023-04-182-0/+246
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This GDB script prints the interrupts in the system in the same way that /proc/interrupts does. This does include the architecture specific part done by arch_show_interrupts() for x86, ARM, ARM64 and MIPS. Example output from an ARM64 system: (gdb) lx-interruptlist CPU0 CPU1 CPU2 CPU3 10: 3167 1225 1276 2629 GICv2 30 Level arch_timer 13: 0 0 0 0 GICv2 36 Level arm-pmu 14: 0 0 0 0 GICv2 37 Level arm-pmu 15: 0 0 0 0 GICv2 38 Level arm-pmu 16: 0 0 0 0 GICv2 39 Level arm-pmu 28: 0 0 0 0 interrupt-controller@8410640 5 Edge brcmstb-gpio-wake 30: 125 0 0 0 GICv2 128 Level ttyS0 31: 0 0 0 0 interrupt-controller@8416000 0 Level mspi_done 32: 0 0 0 0 interrupt-controller@8410640 3 Edge brcmstb-waketimer 33: 0 0 0 0 interrupt-controller@8418580 8 Edge brcmstb-waketimer-rtc 34: 872 0 0 0 GICv2 230 Level brcm_scmi@0 35: 0 0 0 0 interrupt-controller@8410640 10 Edge 8d0f200.usb-phy 37: 0 0 0 0 GICv2 97 Level PCIe PME 42: 0 0 0 0 GICv2 145 Level xhci-hcd:usb1 43: 94 0 0 0 GICv2 71 Level mmc1 44: 0 0 0 0 GICv2 70 Level mmc0 IPI0: 23 666 154 98 Rescheduling interrupts IPI1: 247 1053 1701 634 Function call interrupts IPI2: 0 0 0 0 CPU stop interrupts IPI3: 0 0 0 0 CPU stop (for crash dump) interrupts IPI4: 0 0 0 0 Timer broadcast interrupts IPI5: 7 9 5 0 IRQ work interrupts IPI6: 0 0 0 0 CPU wake-up interrupts ERR: 0 Link: https://lkml.kernel.org/r/20230406220451.1583239-1-f.fainelli@gmail.com Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Kieran Bingham <kbingham@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/gdb: raise error with reduced debugging informationFlorian Fainelli2023-04-181-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If CONFIG_DEBUG_INFO_REDUCED is enabled in the kernel configuration, we will typically not be able to load vmlinux-gdb.py and will fail with: Traceback (most recent call last): File "/home/fainelli/work/buildroot/output/arm64/build/linux-custom/vmlinux-gdb.py", line 25, in <module> import linux.utils File "/home/fainelli/work/buildroot/output/arm64/build/linux-custom/scripts/gdb/linux/utils.py", line 131, in <module> atomic_long_counter_offset = atomic_long_type.get_type()['counter'].bitpos KeyError: 'counter' Rather be left wondering what is happening only to find out that reduced debug information is the cause, raise an eror. This was not typically a problem until e3c8d33e0d62 ("scripts/gdb: fix 'lx-dmesg' on 32 bits arch") but it has since then. Link: https://lkml.kernel.org/r/20230406215252.1580538-1-f.fainelli@gmail.com Fixes: e3c8d33e0d62 ("scripts/gdb: fix 'lx-dmesg' on 32 bits arch") Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Cc: Antonio Borneo <antonio.borneo@foss.st.com> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: John Ogness <john.ogness@linutronix.de> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Petr Mladek <pmladek@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/gdb: add a Radix Tree ParserKieran Bingham2023-04-182-0/+98
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Linux makes use of the Radix Tree data structure to store pointers indexed by integer values. This structure is utilised across many structures in the kernel including the IRQ descriptor tables, and several filesystems. This module provides a method to lookup values from a structure given its head node. Usage: The function lx_radix_tree_lookup, must be given a symbol of type struct radix_tree_root, and an index into that tree. The object returned is a generic integer value, and must be cast correctly to the type based on the storage in the data structure. For example, to print the irq descriptor in the sparse irq_desc_tree at index 18, try the following: (gdb) print (struct irq_desc)$lx_radix_tree_lookup(irq_desc_tree, 18) This script previously existed under commit e127a73d41ac471d7e3ba950cf128f42d6ee3448 ("scripts/gdb: add a Radix Tree Parser") and was later reverted with b447e02548a3304c47b78b5e2d75a4312a8f17e1i (Revert "scripts/gdb: add a Radix Tree Parser"). This version expects the XArray based radix tree implementation and has been verified using QEMU/x86 on Linux 6.3-rc5. [f.fainelli@gmail.com: revive and update for xarray implementation] [f.fainelli@gmail.com: guard against a NULL node in the while loop] Link: https://lkml.kernel.org/r/20230405222743.1191674-1-f.fainelli@gmail.com Link: https://lkml.kernel.org/r/20230404214049.1016811-1-f.fainelli@gmail.com Signed-off-by: Kieran Bingham <kieran.bingham@linaro.org> Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Kieran Bingham <kbingham@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/gdb: fix lx-timerlist for HRTIMER_MAX_CLOCK_BASES printingPeng Liu2023-04-181-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | HRTIMER_MAX_CLOCK_BASES is of enum type hrtimer_base_type. To print it as an integer, HRTIMER_MAX_CLOCK_BASES should be converted first. Link: https://lkml.kernel.org/r/TYCP286MB214640FF0E7F04AC3926A39EC6819@TYCP286MB2146.JPNP286.PROD.OUTLOOK.COM Signed-off-by: Peng Liu <liupeng17@lenovo.com> Reviewed-by: Jan Kiszka <jan.kiszka@siemens.com> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: Kieran Bingham <kbingham@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/gdb: fix lx-timerlist for Python3Peng Liu2023-04-182-2/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Below incompatibilities between Python2 and Python3 made lx-timerlist fail to run under Python3. o xrange() is replaced by range() in Python3 o bytes and str are different types in Python3 o the return value of Inferior.read_memory() is memoryview object in Python3 akpm: cc stable so that older kernels are properly debuggable under newer Python. Link: https://lkml.kernel.org/r/TYCP286MB2146EE1180A4D5176CBA8AB2C6819@TYCP286MB2146.JPNP286.PROD.OUTLOOK.COM Signed-off-by: Peng Liu <liupeng17@lenovo.com> Reviewed-by: Jan Kiszka <jan.kiszka@siemens.com> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: Kieran Bingham <kbingham@kernel.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/gdb: fix lx-timerlist for struct timequeue_head changePeng Liu2023-04-181-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | commit 511885d7061e ("lib/timerqueue: Rely on rbtree semantics for next timer") changed struct timerqueue_head, and so print_active_timers() should be changed accordingly with its way to interpret the structure. Link: https://lkml.kernel.org/r/TYCP286MB21463BD277330B26DDC18903C6819@TYCP286MB2146.JPNP286.PROD.OUTLOOK.COM Signed-off-by: Peng Liu <liupeng17@lenovo.com> Reviewed-by: Jan Kiszka <jan.kiszka@siemens.com> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/gdb: bail early if there are no generic PDFlorian Fainelli2023-04-081-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Avoid generating an exception if there are no generic power domain(s) registered: (gdb) lx-genpd-summary domain status children /device runtime status ---------------------------------------------------------------------- Python Exception <class 'gdb.error'>: No symbol "gpd_list" in current context. Error occurred in Python: No symbol "gpd_list" in current context. (gdb) quit [f.fainelli@gmail.com: correctly invoke gdb_eval_or_none] Link: https://lkml.kernel.org/r/20230327185746.3856407-1-f.fainelli@gmail.com Link: https://lkml.kernel.org/r/20230323231659.3319941-1-f.fainelli@gmail.com Fixes: 8207d4a88e1e ("scripts/gdb: add lx-genpd-summary command") Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Leonard Crestez <leonard.crestez@nxp.com> Cc: Stephen Boyd <sboyd@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/gdb: bail early if there are no clocksFlorian Fainelli2023-04-081-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Avoid generating an exception if there are no clocks registered: (gdb) lx-clk-summary enable prepare protect clock count count count rate ------------------------------------------------------------------------ Python Exception <class 'gdb.error'>: No symbol "clk_root_list" in current context. Error occurred in Python: No symbol "clk_root_list" in current context. Link: https://lkml.kernel.org/r/20230323225246.3302977-1-f.fainelli@gmail.com Fixes: d1e9710b63d8 ("scripts/gdb: initial clk support: lx-clk-summary") Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Leonard Crestez <leonard.crestez@nxp.com> Cc: Stephen Boyd <sboyd@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/gdb: support getting current task struct in UMLGlenn Washburn2023-04-081-2/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A running x86 UML kernel reports with architecture "i386:x86-64" as it is a sub-architecture. However, a difference with bare-metal x86 kernels is in how it manages tasks and the current task struct. To identify that the inferior is a UML kernel and not bare-metal, check for the existence of the UML specific symbol "cpu_tasks" which contains the current task struct. Link: https://lkml.kernel.org/r/b839d611e2906ccef2725c34d8e353fab35fe75e.1677469905.git.development@efficientek.com Signed-off-by: Glenn Washburn <development@efficientek.com> Reviewed-by: Jan Kiszka <jan.kiszka@siemens.com> Cc: Anton Ivanov <anton.ivanov@kot-begemot.co.uk> Cc: Johannes Berg <johannes@sipsolutions.net> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Richard Weinberger <richard@nod.at> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-16 15:14:16 +0000