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4080 Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
Linus Torvalds
|
8630c59e99 |
Kbuild updates for v6.16
- Add support for the EXPORT_SYMBOL_GPL_FOR_MODULES() macro, which exports a
symbol only to specified modules
- Improve ABI handling in gendwarfksyms
- Forcibly link lib-y objects to vmlinux even if CONFIG_MODULES=n
- Add checkers for redundant or missing <linux/export.h> inclusion
- Deprecate the extra-y syntax
- Fix a genksyms bug when including enum constants from *.symref files
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Merge tag 'kbuild-v6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild updates from Masahiro Yamada:
- Add support for the EXPORT_SYMBOL_GPL_FOR_MODULES() macro, which
exports a symbol only to specified modules
- Improve ABI handling in gendwarfksyms
- Forcibly link lib-y objects to vmlinux even if CONFIG_MODULES=n
- Add checkers for redundant or missing <linux/export.h> inclusion
- Deprecate the extra-y syntax
- Fix a genksyms bug when including enum constants from *.symref files
* tag 'kbuild-v6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (28 commits)
genksyms: Fix enum consts from a reference affecting new values
arch: use always-$(KBUILD_BUILTIN) for vmlinux.lds
kbuild: set y instead of 1 to KBUILD_{BUILTIN,MODULES}
efi/libstub: use 'targets' instead of extra-y in Makefile
module: make __mod_device_table__* symbols static
scripts/misc-check: check unnecessary #include <linux/export.h> when W=1
scripts/misc-check: check missing #include <linux/export.h> when W=1
scripts/misc-check: add double-quotes to satisfy shellcheck
kbuild: move W=1 check for scripts/misc-check to top-level Makefile
scripts/tags.sh: allow to use alternative ctags implementation
kconfig: introduce menu type enum
docs: symbol-namespaces: fix reST warning with literal block
kbuild: link lib-y objects to vmlinux forcibly even when CONFIG_MODULES=n
tinyconfig: enable CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
docs/core-api/symbol-namespaces: drop table of contents and section numbering
modpost: check forbidden MODULE_IMPORT_NS("module:") at compile time
kbuild: move kbuild syntax processing to scripts/Makefile.build
Makefile: remove dependency on archscripts for header installation
Documentation/kbuild: Add new gendwarfksyms kABI rules
Documentation/kbuild: Drop section numbers
...
|
||
|
Masahiro Yamada
|
e21efe833e |
arch: use always-$(KBUILD_BUILTIN) for vmlinux.lds
The extra-y syntax is deprecated. Instead, use always-$(KBUILD_BUILTIN), which behaves equivalently. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Acked-by: Johannes Berg <johannes@sipsolutions.net> Reviewed-by: Nicolas Schier <n.schier@avm.de> |
||
|
Linus Torvalds
|
7f9039c524 |
Generic:
* Clean up locking of all vCPUs for a VM by using the *_nest_lock()
family of functions, and move duplicated code to virt/kvm/.
kernel/ patches acked by Peter Zijlstra.
* Add MGLRU support to the access tracking perf test.
ARM fixes:
* Make the irqbypass hooks resilient to changes in the GSI<->MSI
routing, avoiding behind stale vLPI mappings being left behind. The
fix is to resolve the VGIC IRQ using the host IRQ (which is stable)
and nuking the vLPI mapping upon a routing change.
* Close another VGIC race where vCPU creation races with VGIC
creation, leading to in-flight vCPUs entering the kernel w/o private
IRQs allocated.
* Fix a build issue triggered by the recently added workaround for
Ampere's AC04_CPU_23 erratum.
* Correctly sign-extend the VA when emulating a TLBI instruction
potentially targeting a VNCR mapping.
* Avoid dereferencing a NULL pointer in the VGIC debug code, which can
happen if the device doesn't have any mapping yet.
s390:
* Fix interaction between some filesystems and Secure Execution
* Some cleanups and refactorings, preparing for an upcoming big series
x86:
* Wait for target vCPU to acknowledge KVM_REQ_UPDATE_PROTECTED_GUEST_STATE to
fix a race between AP destroy and VMRUN.
* Decrypt and dump the VMSA in dump_vmcb() if debugging enabled for the VM.
* Refine and harden handling of spurious faults.
* Add support for ALLOWED_SEV_FEATURES.
* Add #VMGEXIT to the set of handlers special cased for CONFIG_RETPOLINE=y.
* Treat DEBUGCTL[5:2] as reserved to pave the way for virtualizing features
that utilize those bits.
* Don't account temporary allocations in sev_send_update_data().
* Add support for KVM_CAP_X86_BUS_LOCK_EXIT on SVM, via Bus Lock Threshold.
* Unify virtualization of IBRS on nested VM-Exit, and cross-vCPU IBPB, between
SVM and VMX.
* Advertise support to userspace for WRMSRNS and PREFETCHI.
* Rescan I/O APIC routes after handling EOI that needed to be intercepted due
to the old/previous routing, but not the new/current routing.
* Add a module param to control and enumerate support for device posted
interrupts.
* Fix a potential overflow with nested virt on Intel systems running 32-bit kernels.
* Flush shadow VMCSes on emergency reboot.
* Add support for SNP to the various SEV selftests.
* Add a selftest to verify fastops instructions via forced emulation.
* Refine and optimize KVM's software processing of the posted interrupt bitmap, and share
the harvesting code between KVM and the kernel's Posted MSI handler
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull more kvm updates from Paolo Bonzini:
Generic:
- Clean up locking of all vCPUs for a VM by using the *_nest_lock()
family of functions, and move duplicated code to virt/kvm/. kernel/
patches acked by Peter Zijlstra
- Add MGLRU support to the access tracking perf test
ARM fixes:
- Make the irqbypass hooks resilient to changes in the GSI<->MSI
routing, avoiding behind stale vLPI mappings being left behind. The
fix is to resolve the VGIC IRQ using the host IRQ (which is stable)
and nuking the vLPI mapping upon a routing change
- Close another VGIC race where vCPU creation races with VGIC
creation, leading to in-flight vCPUs entering the kernel w/o
private IRQs allocated
- Fix a build issue triggered by the recently added workaround for
Ampere's AC04_CPU_23 erratum
- Correctly sign-extend the VA when emulating a TLBI instruction
potentially targeting a VNCR mapping
- Avoid dereferencing a NULL pointer in the VGIC debug code, which
can happen if the device doesn't have any mapping yet
s390:
- Fix interaction between some filesystems and Secure Execution
- Some cleanups and refactorings, preparing for an upcoming big
series
x86:
- Wait for target vCPU to ack KVM_REQ_UPDATE_PROTECTED_GUEST_STATE
to fix a race between AP destroy and VMRUN
- Decrypt and dump the VMSA in dump_vmcb() if debugging enabled for
the VM
- Refine and harden handling of spurious faults
- Add support for ALLOWED_SEV_FEATURES
- Add #VMGEXIT to the set of handlers special cased for
CONFIG_RETPOLINE=y
- Treat DEBUGCTL[5:2] as reserved to pave the way for virtualizing
features that utilize those bits
- Don't account temporary allocations in sev_send_update_data()
- Add support for KVM_CAP_X86_BUS_LOCK_EXIT on SVM, via Bus Lock
Threshold
- Unify virtualization of IBRS on nested VM-Exit, and cross-vCPU
IBPB, between SVM and VMX
- Advertise support to userspace for WRMSRNS and PREFETCHI
- Rescan I/O APIC routes after handling EOI that needed to be
intercepted due to the old/previous routing, but not the
new/current routing
- Add a module param to control and enumerate support for device
posted interrupts
- Fix a potential overflow with nested virt on Intel systems running
32-bit kernels
- Flush shadow VMCSes on emergency reboot
- Add support for SNP to the various SEV selftests
- Add a selftest to verify fastops instructions via forced emulation
- Refine and optimize KVM's software processing of the posted
interrupt bitmap, and share the harvesting code between KVM and the
kernel's Posted MSI handler"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (93 commits)
rtmutex_api: provide correct extern functions
KVM: arm64: vgic-debug: Avoid dereferencing NULL ITE pointer
KVM: arm64: vgic-init: Plug vCPU vs. VGIC creation race
KVM: arm64: Unmap vLPIs affected by changes to GSI routing information
KVM: arm64: Resolve vLPI by host IRQ in vgic_v4_unset_forwarding()
KVM: arm64: Protect vLPI translation with vgic_irq::irq_lock
KVM: arm64: Use lock guard in vgic_v4_set_forwarding()
KVM: arm64: Mask out non-VA bits from TLBI VA* on VNCR invalidation
arm64: sysreg: Drag linux/kconfig.h to work around vdso build issue
KVM: s390: Simplify and move pv code
KVM: s390: Refactor and split some gmap helpers
KVM: s390: Remove unneeded srcu lock
s390: Remove unneeded includes
s390/uv: Improve splitting of large folios that cannot be split while dirty
s390/uv: Always return 0 from s390_wiggle_split_folio() if successful
s390/uv: Don't return 0 from make_hva_secure() if the operation was not successful
rust: add helper for mutex_trylock
RISC-V: KVM: use kvm_trylock_all_vcpus when locking all vCPUs
KVM: arm64: use kvm_trylock_all_vcpus when locking all vCPUs
x86: KVM: SVM: use kvm_lock_all_vcpus instead of a custom implementation
...
|
||
|
Paolo Bonzini
|
e9ba21fb5d |
* Fix interaction between some filesystems and Secure Execution
* Some cleanups and refactorings, preparing for an upcoming big series -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEoWuZBM6M3lCBSfTnuARItAMU6BMFAmg3MQAACgkQuARItAMU 6BPuAw//T/jJ9faqhGsQcHJ5ovDPCLOC0P69rDN9XsKgKxstSka4EM6a1uLmRScm V4eLkov+0iD1xGv8xF8GPsyOEpXPthKjgg5OCjVUNhklK9+5RA/1MUxXe09fHoZ4 zac49upOGjRX4w8OeSPCeEL2hBFwJRcbqiTPrtWM3wuhAfFCb3XhM8rsuKDXgDGS TvsjHkDLYzmfGUfJj9v4h8rVUeA++9hK/7cajGpZYKrDszdGZQwrZrTMQMsojiYG BYxaJMNBWcLIcHejUk1mXKI22SWfBIMtwdNem8gFsf1jkgISC9fOUKEQOVC1rnVK JZeHWrndT8HcDCn0hB+cGsSv366S5jlcAyjAQVbspUg7K0YerXXg5xn7+yb6N0S6 bDmgvJTi9n1vgUicvqof62M52NehrslyNB/y7LqrR/jJi7XcnHNR3T6S+Bs5xTAg /O8+GGC1ml4FNNhXt3ZjrTJCwbQJnHtacKWEPtfkQ6REvpThvkJOBKBtqBV4qI5E QHB7hMV49vowmhaqOnQPD/l5XBCg2zKLKMBUbWzSboQpHhV8jGTTCsxcYR3rj/HY 4nUHk6u8DI8NGJ1sOhmbBePBzeW1ddlHVD2E9KeHXWrBJrXLaoRjrkWO6jQsUS+1 5GCYJHk+z9W/tPpZopa88ABj8Aqhr6rMd2CkIGFo1Wpci/j1gmU= =KT// -----END PGP SIGNATURE----- Merge tag 'kvm-s390-next-6.16-1' of https://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD * Fix interaction between some filesystems and Secure Execution * Some cleanups and refactorings, preparing for an upcoming big series |
||
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Claudio Imbrenda
|
d6c8097803 |
KVM: s390: Simplify and move pv code
All functions in kvm/gmap.c fit better in kvm/pv.c instead. Move and rename them appropriately, then delete the now empty kvm/gmap.c and kvm/gmap.h. Reviewed-by: Nina Schoetterl-Glausch <nsg@linux.ibm.com> Reviewed-by: Steffen Eiden <seiden@linux.ibm.com> Reviewed-by: Christoph Schlameuss <schlameuss@linux.ibm.com> Acked-by: Janosch Frank <frankja@linux.ibm.com> Link: https://lore.kernel.org/r/20250528095502.226213-5-imbrenda@linux.ibm.com Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com> Message-ID: <20250528095502.226213-5-imbrenda@linux.ibm.com> |
||
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David Hildenbrand
|
ab73b29efd |
s390/uv: Improve splitting of large folios that cannot be split while dirty
Currently, starting a PV VM on an iomap-based filesystem with large folio support, such as XFS, will not work. We'll be stuck in unpack_one()->gmap_make_secure(), because we can't seem to make progress splitting the large folio. The problem is that we require a writable PTE but a writable PTE under such filesystems will imply a dirty folio. So whenever we have a writable PTE, we'll have a dirty folio, and dirty iomap folios cannot currently get split, because split_folio()->split_huge_page_to_list_to_order()->filemap_release_folio() will fail in iomap_release_folio(). So we will not make any progress splitting such large folios. Until dirty folios can be split more reliably, let's manually trigger writeback of the problematic folio using filemap_write_and_wait_range(), and retry the split immediately afterwards exactly once, before looking up the folio again. Should this logic be part of split_folio()? Likely not; most split users don't have to split so eagerly to make any progress. For now, this seems to affect xfs, zonefs and erofs, and this patch makes it work again (tested on xfs only). While this could be considered a fix for commit |
||
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David Hildenbrand
|
bd428b8c79 |
s390/uv: Always return 0 from s390_wiggle_split_folio() if successful
Let's consistently return 0 if the operation was successful, and just detect ourselves whether splitting is required -- folio_test_large() is a cheap operation. Update the documentation. Should we simply always return -EAGAIN instead of 0, so we don't have to handle it in the caller? Not sure, staring at the documentation, this way looks a bit cleaner. Signed-off-by: David Hildenbrand <david@redhat.com> Link: https://lore.kernel.org/r/20250516123946.1648026-3-david@redhat.com Message-ID: <20250516123946.1648026-3-david@redhat.com> Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com> Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com> |
||
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David Hildenbrand
|
3ec8a8330a |
s390/uv: Don't return 0 from make_hva_secure() if the operation was not successful
If s390_wiggle_split_folio() returns 0 because splitting a large folio
succeeded, we will return 0 from make_hva_secure() even though a retry
is required. Return -EAGAIN in that case.
Otherwise, we'll return 0 from gmap_make_secure(), and consequently from
unpack_one(). In kvm_s390_pv_unpack(), we assume that unpacking
succeeded and skip unpacking this page. Later on, we run into issues
and fail booting the VM.
So far, this issue was only observed with follow-up patches where we
split large pagecache XFS folios. Maybe it can also be triggered with
shmem?
We'll cleanup s390_wiggle_split_folio() a bit next, to also return 0
if no split was required.
Fixes:
|
||
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Linus Torvalds
|
ddddf9d64f |
Performance events updates for v6.16:
Core & generic-arch updates:
- Add support for dynamic constraints and propagate it to
the Intel driver (Kan Liang)
- Fix & enhance driver-specific throttling support (Kan Liang)
- Record sample last_period before updating on the
x86 and PowerPC platforms (Mark Barnett)
- Make perf_pmu_unregister() usable (Peter Zijlstra)
- Unify perf_event_free_task() / perf_event_exit_task_context()
(Peter Zijlstra)
- Simplify perf_event_release_kernel() and perf_event_free_task()
(Peter Zijlstra)
- Allocate non-contiguous AUX pages by default (Yabin Cui)
Uprobes updates:
- Add support to emulate NOP instructions (Jiri Olsa)
- selftests/bpf: Add 5-byte NOP uprobe trigger benchmark (Jiri Olsa)
x86 Intel PMU enhancements:
- Support Intel Auto Counter Reload [ACR] (Kan Liang)
- Add PMU support for Clearwater Forest (Dapeng Mi)
- Arch-PEBS preparatory changes: (Dapeng Mi)
- Parse CPUID archPerfmonExt leaves for non-hybrid CPUs
- Decouple BTS initialization from PEBS initialization
- Introduce pairs of PEBS static calls
x86 AMD PMU enhancements:
- Use hrtimer for handling overflows in the AMD uncore driver
(Sandipan Das)
- Prevent UMC counters from saturating (Sandipan Das)
Fixes and cleanups:
- Fix put_ctx() ordering (Frederic Weisbecker)
- Fix irq work dereferencing garbage (Frederic Weisbecker)
- Misc fixes and cleanups (Changbin Du, Frederic Weisbecker,
Ian Rogers, Ingo Molnar, Kan Liang, Peter Zijlstra, Qing Wang,
Sandipan Das, Thorsten Blum)
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'perf-core-2025-05-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf events updates from Ingo Molnar:
"Core & generic-arch updates:
- Add support for dynamic constraints and propagate it to the Intel
driver (Kan Liang)
- Fix & enhance driver-specific throttling support (Kan Liang)
- Record sample last_period before updating on the x86 and PowerPC
platforms (Mark Barnett)
- Make perf_pmu_unregister() usable (Peter Zijlstra)
- Unify perf_event_free_task() / perf_event_exit_task_context()
(Peter Zijlstra)
- Simplify perf_event_release_kernel() and perf_event_free_task()
(Peter Zijlstra)
- Allocate non-contiguous AUX pages by default (Yabin Cui)
Uprobes updates:
- Add support to emulate NOP instructions (Jiri Olsa)
- selftests/bpf: Add 5-byte NOP uprobe trigger benchmark (Jiri Olsa)
x86 Intel PMU enhancements:
- Support Intel Auto Counter Reload [ACR] (Kan Liang)
- Add PMU support for Clearwater Forest (Dapeng Mi)
- Arch-PEBS preparatory changes: (Dapeng Mi)
- Parse CPUID archPerfmonExt leaves for non-hybrid CPUs
- Decouple BTS initialization from PEBS initialization
- Introduce pairs of PEBS static calls
x86 AMD PMU enhancements:
- Use hrtimer for handling overflows in the AMD uncore driver
(Sandipan Das)
- Prevent UMC counters from saturating (Sandipan Das)
Fixes and cleanups:
- Fix put_ctx() ordering (Frederic Weisbecker)
- Fix irq work dereferencing garbage (Frederic Weisbecker)
- Misc fixes and cleanups (Changbin Du, Frederic Weisbecker, Ian
Rogers, Ingo Molnar, Kan Liang, Peter Zijlstra, Qing Wang, Sandipan
Das, Thorsten Blum)"
* tag 'perf-core-2025-05-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (60 commits)
perf/headers: Clean up <linux/perf_event.h> a bit
perf/uapi: Clean up <uapi/linux/perf_event.h> a bit
perf/uapi: Fix PERF_RECORD_SAMPLE comments in <uapi/linux/perf_event.h>
mips/perf: Remove driver-specific throttle support
xtensa/perf: Remove driver-specific throttle support
sparc/perf: Remove driver-specific throttle support
loongarch/perf: Remove driver-specific throttle support
csky/perf: Remove driver-specific throttle support
arc/perf: Remove driver-specific throttle support
alpha/perf: Remove driver-specific throttle support
perf/apple_m1: Remove driver-specific throttle support
perf/arm: Remove driver-specific throttle support
s390/perf: Remove driver-specific throttle support
powerpc/perf: Remove driver-specific throttle support
perf/x86/zhaoxin: Remove driver-specific throttle support
perf/x86/amd: Remove driver-specific throttle support
perf/x86/intel: Remove driver-specific throttle support
perf: Only dump the throttle log for the leader
perf: Fix the throttle logic for a group
perf/core: Add the is_event_in_freq_mode() helper to simplify the code
...
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Linus Torvalds
|
d8cb068359 |
s390 updates for 6.16 merge window
- Large rework of the protected key crypto code to allow for asynchronous handling without memory allocation - Speed up system call entry/exit path by re-implementing lazy ASCE handling - Add module autoload support for the diag288_wdt watchdog device driver - Get rid of s390 specific strcpy() and strncpy() implementations, and switch all remaining users to strscpy() when possible - Various other small fixes and improvements -----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEECMNfWEw3SLnmiLkZIg7DeRspbsIFAmgwuaIACgkQIg7DeRsp bsJ+xA//VTVWo15XHqX6xuJOSGSjwE7BbyA2RBNoIK+qH2PqCRvwvJU+QUcmjiKF v+GHOL5GGypKneEVjHCB4xTlKeBPt61yf9/dmTbE4K8KD/3olpHcC6BY62VJiet1 hDd6Tx9JT3TmjiTV+BanJ5KdiioUxc7jjJ2etMpQkCsHwAZlBtJ+yK+P/IoSI2kP 80hhNPHvlBadd36ke+Ell95TJBoxhQkKPX/u8ryIKybCvUf4ybsoEaYSPJv8/2I8 G4IqhTQ0Ft5BcO0g2gcfkpU+8HUtrqhjIDDDhy2h42wuWXsE2Jn3/PieNJUybtwA QdsAcN7P85a1TX2L7e4cEM9LEeIk15syZ8mUDKl6H69UHz4M8VNjMO8XfPpFD2ml 5xCPp7D+RcvUkdnjmz0jLx18mgrF9xjTTqrhYwcP2PWtANvf2m602ElEUlIWuRpI Mew/wgCfSdqKsYEbPenvfT+XTd62+hMdo3U3dwZ6OZlKwVXNTk5EUXe3UgMDkKdO 37OmAh5N2DcYwtPtL9vtl1CLguVJD+FXRnB/veHLCg25+OO/G4IrobySOjI7K0m7 C48Z5lUjxVJiRjKe35XXwBjuEaN+/TctK1kH3RfCDQGvBGBNoPyvC+L4kOprsbce 1Lnc7/pFCKdP5y90sJMomMdJCyP5BHKiJvHHWTr8maeslfxd9Vw= =lFqh -----END PGP SIGNATURE----- Merge tag 's390-6.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux Pull s390 updates from Heiko Carstens: - Large rework of the protected key crypto code to allow for asynchronous handling without memory allocation - Speed up system call entry/exit path by re-implementing lazy ASCE handling - Add module autoload support for the diag288_wdt watchdog device driver - Get rid of s390 specific strcpy() and strncpy() implementations, and switch all remaining users to strscpy() when possible - Various other small fixes and improvements * tag 's390-6.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (51 commits) s390/pci: Serialize device addition and removal s390/pci: Allow re-add of a reserved but not yet removed device s390/pci: Prevent self deletion in disable_slot() s390/pci: Remove redundant bus removal and disable from zpci_release_device() s390/crypto: Extend protected key conversion retry loop s390/pci: Fix __pcilg_mio_inuser() inline assembly s390/ptrace: Always inline regs_get_kernel_stack_nth() and regs_get_register() s390/thread_info: Cleanup header includes s390/extmem: Add workaround for DCSS unload diag s390/crypto: Rework protected key AES for true asynch support s390/cpacf: Rework cpacf_pcc() to return condition code s390/mm: Fix potential use-after-free in __crst_table_upgrade() s390/mm: Add mmap_assert_write_locked() check to crst_table_upgrade() s390/string: Remove strcpy() implementation s390/con3270: Use strscpy() instead of strcpy() s390/boot: Use strspcy() instead of strcpy() s390: Simple strcpy() to strscpy() conversions s390/pkey/crypto: Introduce xflags param for pkey in-kernel API s390/pkey: Provide and pass xflags within pkey and zcrypt layers s390/uv: Remove uv_get_secret_metadata function ... |
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Kan Liang
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6792f74e8d |
s390/perf: Remove driver-specific throttle support
The throttle support has been added in the generic code. Remove the driver-specific throttle support. Besides the throttle, perf_event_overflow may return true because of event_limit. It already does an inatomic event disable. The pmu->stop is not required either. Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Thomas Richter <tmricht@linux.ibm.com> Link: https://lore.kernel.org/r/20250520181644.2673067-8-kan.liang@linux.intel.com |
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Heiko Carstens
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d35ef47a43 |
s390/ptrace: Always inline regs_get_kernel_stack_nth() and regs_get_register()
Both regs_get_kernel_stack_nth() and regs_get_register() are not
inlined. With the new ftrace funcgraph-args feature they show up in
function graph tracing:
4) | sched_core_idle_cpu(cpu=4) {
4) 0.257 us | regs_get_register(regs=0x37fe00afa10, offset=2);
4) 0.218 us | regs_get_register(regs=0x37fe00afa10, offset=3);
4) 0.225 us | regs_get_register(regs=0x37fe00afa10, offset=4);
4) 0.239 us | regs_get_register(regs=0x37fe00afa10, offset=5);
4) 0.239 us | regs_get_register(regs=0x37fe00afa10, offset=6);
4) 0.245 us | regs_get_kernel_stack_nth(regs=0x37fe00afa10, n=20);
This is subtoptimal, since both functions are supposed to be ftrace
internal helper functions. If they appear in ftrace traces this reduces
readability significantly, plus this adds tons of extra useless extra
entries.
Address this by moving both functions and required helpers to ptrace.h and
always inline them. This way they don't appear in traces anymore. In
addition the overhead that comes with functions calls is also reduced.
Reviewed-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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Heiko Carstens
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ae952eea6f |
s390/entry: Fix last breaking event handling in case of stack corruption
In case of stack corruption stack_invalid() is called and the expectation
is that register r10 contains the last breaking event address. This
dependency is quite subtle and broke a couple of years ago without that
anybody noticed.
Fix this by getting rid of the dependency and read the last breaking event
address from lowcore.
Fixes:
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Heiko Carstens
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e76b8c1d7a |
s390: Simple strcpy() to strscpy() conversions
Convert all strcpy() usages to strscpy() where the conversion means just replacing strcpy() with strscpy(). strcpy() is deprecated since it performs no bounds checking on the destination buffer. Reviewed-by: Mikhail Zaslonko <zaslonko@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com> |
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Harald Freudenberger
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a42831f0b7 |
s390/uv: Remove uv_get_secret_metadata function
The uv_get_secret_metadata() in-kernel function was only offered and used by the pkey uv handler. Remove it as there is no customer any more. Suggested-by: Steffen Eiden <seiden@linux.ibm.com> Signed-off-by: Harald Freudenberger <freude@linux.ibm.com> Reviewed-by: Steffen Eiden <seiden@linux.ibm.com> Acked-by: Holger Dengler <dengler@linux.ibm.com> Link: https://lore.kernel.org/r/20250424133619.16495-24-freude@linux.ibm.com Signed-off-by: Heiko Carstens <hca@linux.ibm.com> |
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Harald Freudenberger
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933dd21d92 |
s390/uv: Rename find_secret() to uv_find_secret() and publish
Rename the internal UV function find_secret() to uv_find_secret() and publish it as new UV API in-kernel function. The pkey uv handler may be called in a do-not-allocate memory situation where sleeping is allowed but allocating memory which may cause IO operations is not. For example when an encrypted swap file is used and the encryption is done via UV retrievable secrets with protected keys. The UV API function uv_get_secret_metadata() allocates memory and then calls the find_secret() function. By exposing the find_secret() function as a new UV API function uv_find_secret() it is possible to retrieve UV secret meta data without any memory allocations from the UV when the caller offers space for one struct uv_secret_list. Signed-off-by: Harald Freudenberger <freude@linux.ibm.com> Reviewed-by: Steffen Eiden <seiden@linux.ibm.com> Acked-by: Holger Dengler <dengler@linux.ibm.com> Link: https://lore.kernel.org/r/20250424133619.16495-22-freude@linux.ibm.com Signed-off-by: Heiko Carstens <hca@linux.ibm.com> |
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Thomas Richter
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7cf58880ea |
s390/cpumf: Adjust number of leading zeroes for z15 attributes
In CPUMF attribute definitions for z15 all CPUMF attributes
have configuration values of the form 0x0[0-9a-f]{3} .
However 2 defines do not match this scheme, they have two leading
zeroes instead of one. Adjust this. No functional change.
Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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Heiko Carstens
|
e7ae507c02 |
s390: Remove optional third argument of strscpy() if possible
The third argument of strscpy() is optional and can be left away iff the destination is an array and the maximum size of the copy is the size of destination. Remove the third argument for those cases where this is possible. Acked-by: Alexander Gordeev <agordeev@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com> |
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Heiko Carstens
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2eba6f9e6b |
s390/ipl: Rename and change strncpy_skip_quote()
Rename strncpy_skip_quote() to strscpy_skip_quote() and change its implementation so that the destination string is always NUL terminated. Signed-off-by: Heiko Carstens <hca@linux.ibm.com> |
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Heiko Carstens
|
1c745df519 |
watchdog: diag288_wdt: Implement module autoload
The s390 specific diag288_wdt watchdog driver makes use of the virtual watchdog timer, which is available in most machine configurations. If executing the diagnose instruction with subcode 0x288 results in an exception the watchdog timer is not available, otherwise it is available. In order to allow module autoload of the diag288_wdt module, move the detection of the virtual watchdog timer to early boot code, and provide its availability as a cpu feature. This allows to make use of module_cpu_feature_match() to automatically load the module iff the virtual watchdog timer is available. Suggested-by: Marc Hartmayer <mhartmay@linux.ibm.com> Tested-by: Mete Durlu <meted@linux.ibm.com> Acked-by: Guenter Roeck <linux@roeck-us.net> Link: https://lore.kernel.org/r/20250410095036.1525057-1-hca@linux.ibm.com Signed-off-by: Heiko Carstens <hca@linux.ibm.com> |
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Heiko Carstens
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8b72f5a97b |
s390/mm: Reimplement lazy ASCE handling
Reduce system call overhead time (round trip time for invoking a non-existent system call) by 25%. With the removal of set_fs() [1] lazy control register handling was removed in order to keep kernel entry and exit simple. However this made system calls slower. With the conversion to generic entry [2] and numerous follow up changes which simplified the entry code significantly, adding support for lazy asce handling doesn't add much complexity to the entry code anymore. In particular this means: - On kernel entry the primary asce is not modified and contains the user asce - Kernel accesses which require secondary-space mode (for example futex operations) are surrounded by enable_sacf_uaccess() and disable_sacf_uaccess() calls. enable_sacf_uaccess() sets the primary asce to kernel asce so that the sacf instruction can be used to switch to secondary-space mode. The primary asce is changed back to user asce with disable_sacf_uaccess(). The state of the control register which contains the primary asce is reflected with a new TIF_ASCE_PRIMARY bit. This is required on context switch so that the correct asce is restored for the scheduled in process. In result address spaces are now setup like this: CPU running in | %cr1 ASCE | %cr7 ASCE | %cr13 ASCE -----------------------------|-----------|-----------|----------- user space | user | user | kernel kernel (no sacf) | user | user | kernel kernel (during sacf uaccess) | kernel | user | kernel kernel (kvm guest execution) | guest | user | kernel In result cr1 control register content is not changed except for: - futex system calls - legacy s390 PCI system calls - the kvm specific cmpxchg_user_key() uaccess helper This leads to faster system call execution. [1] |
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Thomas Richter
|
aa1ac98268 |
s390/cpumf: Fix double free on error in cpumf_pmu_event_init()
In PMU event initialization functions - cpumsf_pmu_event_init() - cpumf_pmu_event_init() - cfdiag_event_init() the partially created event had to be removed when an error was detected. The event::event_init() member function had to release all resources it allocated in case of error. event::destroy() had to be called on freeing an event after it was successfully created and event::event_init() returned success. With commit |
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Thomas Richter
|
df194f57de |
s390/cpumf: Update CPU Measurement facility extended counter set support
Update CPU Measurement counter facility support for the extended counter set for machine types 9175 and 9176. Signed-off-by: Thomas Richter <tmricht@linux.ibm.com> Acked-by: Sumanth Korikkar <sumanthk@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com> |
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Vasily Gorbik
|
8231a0e632 |
s390: Add z17 elf platform
Add detection for machine types 0x9175 and 0x9176 and set ELF platform name to z17. Reviewed-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com> |
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Thomas Gleixner
|
8fa7292fee |
treewide: Switch/rename to timer_delete[_sync]()
timer_delete[_sync]() replaces del_timer[_sync](). Convert the whole tree over and remove the historical wrapper inlines. Conversion was done with coccinelle plus manual fixups where necessary. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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Linus Torvalds
|
dd9db3bff8 |
more s390 updates for 6.15 merge window
- Fix machine check handler _CIF_MCCK_GUEST bit setting by adding the missing base register for relocated lowcore address - Fix build failure on older linkers by conditionally adding the -no-pie linker option only when it is supported - Fix inaccurate kernel messages in vfio-ap by providing descriptive error notifications for AP queue sharing violations - Fix PCI isolation logic by ensuring non-VF devices correctly return false in zpci_bus_is_isolated_vf() - Fix PCI DMA range map setup by using dma_direct_set_offset() to add a proper sentinel element, preventing potential overruns and translation errors - Cleanup header dependency problems with asm-offsets.c - Add fault info for unexpected low-address protection faults in user mode - Add support for HOTPLUG_SMT, replacing the arch-specific "nosmt" handling with common code handling - Use bitop functions to implement CPU flag helper functions to ensure that bits cannot get lost if modified in different contexts on a CPU - Remove unused machine_flags for the lowcore -----BEGIN PGP SIGNATURE----- iQEzBAABCAAdFiEE3QHqV+H2a8xAv27vjYWKoQLXFBgFAmfwbhwACgkQjYWKoQLX FBgmlwf5ASFl51yYziSg47NTOdCgkdE1un69VKCU7g9nzQBCFiK4PT+H/d69JHpt g9dHi4sW6aXooUWyqtrQbsDZSnGKvJd48wOkpqAKKKJCBx3On/7s1fi1sJXgJovo rSwC1cRD+yfFDNoQgXytSrRAkoPYvIPxf0aQei/8ziVNOrl7iF7nyPYpgNcZl2iz rQWt+o4oWhygs6lK4w9t+0V0QLL+CqTIN/tpf7qeQzNFN5WfRJBn0dtxQhK72enG WepU41LnZxDF5DTKhH4+PZFdLPP+YwwTGdqojW28leGy5T3/Eg0wrDaU1034Wpgd m5Fg03z94Vdul/rAEscaH1PLT3Ufng== =G5/g -----END PGP SIGNATURE----- Merge tag 's390-6.15-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux Pull more s390 updates from Vasily Gorbik: - Fix machine check handler _CIF_MCCK_GUEST bit setting by adding the missing base register for relocated lowcore address - Fix build failure on older linkers by conditionally adding the -no-pie linker option only when it is supported - Fix inaccurate kernel messages in vfio-ap by providing descriptive error notifications for AP queue sharing violations - Fix PCI isolation logic by ensuring non-VF devices correctly return false in zpci_bus_is_isolated_vf() - Fix PCI DMA range map setup by using dma_direct_set_offset() to add a proper sentinel element, preventing potential overruns and translation errors - Cleanup header dependency problems with asm-offsets.c - Add fault info for unexpected low-address protection faults in user mode - Add support for HOTPLUG_SMT, replacing the arch-specific "nosmt" handling with common code handling - Use bitop functions to implement CPU flag helper functions to ensure that bits cannot get lost if modified in different contexts on a CPU - Remove unused machine_flags for the lowcore * tag 's390-6.15-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: s390/vfio-ap: Fix no AP queue sharing allowed message written to kernel log s390/pci: Fix dev.dma_range_map missing sentinel element s390/mm: Dump fault info in case of low address protection fault s390/smp: Add support for HOTPLUG_SMT s390: Fix linker error when -no-pie option is unavailable s390/processor: Use bitop functions for cpu flag helper functions s390/asm-offsets: Remove ASM_OFFSETS_C s390/asm-offsets: Include ftrace_regs.h instead of ftrace.h s390/kvm: Split kvm_host header file s390/pci: Fix zpci_bus_is_isolated_vf() for non-VFs s390/lowcore: Remove unused machine_flags s390/entry: Fix setting _CIF_MCCK_GUEST with lowcore relocation |
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|
Heiko Carstens
|
24e3f9fbbd |
mseal sysmap: enable s390
Provide support for CONFIG_MSEAL_SYSTEM_MAPPINGS on s390, covering the vdso. [hca@linux.ibm.com: update supported architectures] Link: https://lkml.kernel.org/r/20250317131917.1332402-1-hca@linux.ibm.com Link: https://lkml.kernel.org/r/20250311123326.2686682-3-hca@linux.ibm.com Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: Alexander Gordeev <agordeev@linux.ibm.com> Cc: Christian Borntraeger <borntraeger@linux.ibm.com> Cc: Jeff Xu <jeffxu@chromium.org> Cc: Liam Howlett <liam.howlett@oracle.com> Cc: Sven Schnelle <svens@linux.ibm.com> Cc: Thomas Weißschuh <thomas.weissschuh@linutronix.de> Cc: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
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Heiko Carstens
|
1018424ace |
s390/smp: Add support for HOTPLUG_SMT
Add support for HOTPLUG_SMT. With this the s390 specific "nosmt" kernel command line parameter handling is replaced with common code handling. This means that just specifying "nosmt" still enables smt from an architectural point of view, however only the primary (base) cpu can be set online. Enabling smt during runtime via /sys/devices/system/cpu/smt/control allows to set secondary cpus online. This way "nosmt" works like on other architectures where enabling and disabling smt during runtime is possible. If "nosmt=force" is specified smt is also still enabled from an architectural point of view, but there is no way to set secondary cpus online during runtime, also like on other architectures. In order to disable smt from architectural point of view, which was previously achieved with the s390 specific "nosmt" command line option, "smt=1" can be used. Tested-by: Mete Durlu <meted@linux.ibm.com> Reviewed-by: Mete Durlu <meted@linux.ibm.com> Acked-by: Christian Borntraeger <borntraeger@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> |
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Heiko Carstens
|
b9be1bee2f |
s390/asm-offsets: Remove ASM_OFFSETS_C
Remove ASM_OFFSETS_C which is used as guard in thread_info.h to decide if asm-offsets can be included or not. There is no reason to include asm-offsets.h in thread_info.h anymore. Remove the define and the not needed include. Explicitly include asm-offsets.h in all header files which require it, and where it used to be included implicitly via thread_info.h. This reduces header dependencies. Acked-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> |
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|
Heiko Carstens
|
5eeec56945 |
s390/asm-offsets: Include ftrace_regs.h instead of ftrace.h
Reduce header dependencies by including ftrace_regs.h and ptrace.h, which does not include other header files, instead of ftrace.h which pulls in various other header files. This is sufficient for __FTRACE_REGS_PT_REGS and __FTRACE_REGS_SIZE. Acked-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> |
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|
Heiko Carstens
|
d104937874 |
s390/kvm: Split kvm_host header file
In order to generate asm offsets into kvm_s390_sie_block linux/kvm_host.h is included in asm-offsets.c. This causes quite often header dependency problems, since linux/kvm_host.h pulls in a lot of other header files. Solve this problem and split out the hardware structure declarations into a separate header file. Include only the new header file into asm-offsets.c instead of linux/kvm_host.h. This is sufficient to generate the two asm offsets required for kvm (__SIE_PROG0C and __SIE_PROG20). Acked-by: Claudio Imbrenda <imbrenda@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> |
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Heiko Carstens
|
1f266fd704 |
s390/lowcore: Remove unused machine_flags
The machine_flags member in struct lowcore is not used anymore. Remove it. Reviewed-by: Sven Schnelle <svens@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> |
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|
Sven Schnelle
|
121df45b37 |
s390/entry: Fix setting _CIF_MCCK_GUEST with lowcore relocation
When lowcore relocation is enabled, the machine check handler doesn't
use the lowcore address when setting _CIF_MCCK_GUEST. Fix this by
adding the missing base register.
Fixes:
|
||
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Linus Torvalds
|
f90f2145b2 |
s390 updates for 6.15 merge window
- Add sorting of mcount locations at build time - Rework uaccess functions with C exception handling to shorten inline assembly size and enable full inlining. This yields near-optimal code for small constant copies with a ~40kb kernel size increase - Add support for a configurable STRICT_MM_TYPECHECKS which allows to generate better code, but also allows to have type checking for debug builds - Optimize get_lowcore() for common callers with alternatives that nearly revert to the pre-relocated lowcore code, while also slightly reducing syscall entry and exit time - Convert MACHINE_HAS_* checks for single facility tests into cpu_has_* style macros that call test_facility(), and for features with additional conditions, add a new ALT_TYPE_FEATURE alternative to provide a static branch via alternative patching. Also, move machine feature detection to the decompressor for early patching and add debugging functionality to easily show which alternatives are patched - Add exception table support to early boot / startup code to get rid of the open coded exception handling - Use asm_inline for all inline assemblies with EX_TABLE or ALTERNATIVE to ensure correct inlining and unrolling decisions - Remove 2k page table leftovers now that s390 has been switched to always allocate 4k page tables - Split kfence pool into 4k mappings in arch_kfence_init_pool() and remove the architecture-specific kfence_split_mapping() - Use READ_ONCE_NOCHECK() in regs_get_kernel_stack_nth() to silence spurious KASAN warnings from opportunistic ftrace argument tracing - Force __atomic_add_const() variants on s390 to always return void, ensuring compile errors for improper usage - Remove s390's ioremap_wt() and pgprot_writethrough() due to mismatched semantics and lack of known users, relying on asm-generic fallbacks - Signal eventfd in vfio-ap to notify userspace when the guest AP configuration changes, including during mdev removal - Convert mdev_types from an array to a pointer in vfio-ccw and vfio-ap drivers to avoid fake flex array confusion - Cleanup trap code - Remove references to the outdated linux390@de.ibm.com address - Other various small fixes and improvements all over the code -----BEGIN PGP SIGNATURE----- iQEzBAABCAAdFiEE3QHqV+H2a8xAv27vjYWKoQLXFBgFAmfmuPwACgkQjYWKoQLX FBgTDAgAjKmZ5OYjACRfYepTvKk9SDqa2CBlQZ+BhbAXEVIrxKnv8OkImAXoWNsM mFxiCxAHWdcD+nqTrxFsXhkNLsndijlwnj/IqZgvy6R/3yNtBlAYRPLujOmVrsQB dWB8Dl38p63Ip1JfAqyabiAOUjfhrclRcM5FX5tgciXA6N/vhY3OM6k0+k7wN4Nj Dei/rCrnYRXTrFQgtM4w8JTIrwdnXjeKvaTYCflh4Q5ISJ7TceSF7cqq8HOs5hhK o2ciaoTdx212522CIsxeN3Ls3jrn8bCOCoOeSCysc5RL84grAuFnmjSajo1LFide S/TQtHXYy78Wuei9xvHi561ogiv/ww== =Kxgc -----END PGP SIGNATURE----- Merge tag 's390-6.15-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux Pull s390 updates from Vasily Gorbik: - Add sorting of mcount locations at build time - Rework uaccess functions with C exception handling to shorten inline assembly size and enable full inlining. This yields near-optimal code for small constant copies with a ~40kb kernel size increase - Add support for a configurable STRICT_MM_TYPECHECKS which allows to generate better code, but also allows to have type checking for debug builds - Optimize get_lowcore() for common callers with alternatives that nearly revert to the pre-relocated lowcore code, while also slightly reducing syscall entry and exit time - Convert MACHINE_HAS_* checks for single facility tests into cpu_has_* style macros that call test_facility(), and for features with additional conditions, add a new ALT_TYPE_FEATURE alternative to provide a static branch via alternative patching. Also, move machine feature detection to the decompressor for early patching and add debugging functionality to easily show which alternatives are patched - Add exception table support to early boot / startup code to get rid of the open coded exception handling - Use asm_inline for all inline assemblies with EX_TABLE or ALTERNATIVE to ensure correct inlining and unrolling decisions - Remove 2k page table leftovers now that s390 has been switched to always allocate 4k page tables - Split kfence pool into 4k mappings in arch_kfence_init_pool() and remove the architecture-specific kfence_split_mapping() - Use READ_ONCE_NOCHECK() in regs_get_kernel_stack_nth() to silence spurious KASAN warnings from opportunistic ftrace argument tracing - Force __atomic_add_const() variants on s390 to always return void, ensuring compile errors for improper usage - Remove s390's ioremap_wt() and pgprot_writethrough() due to mismatched semantics and lack of known users, relying on asm-generic fallbacks - Signal eventfd in vfio-ap to notify userspace when the guest AP configuration changes, including during mdev removal - Convert mdev_types from an array to a pointer in vfio-ccw and vfio-ap drivers to avoid fake flex array confusion - Cleanup trap code - Remove references to the outdated linux390@de.ibm.com address - Other various small fixes and improvements all over the code * tag 's390-6.15-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (78 commits) s390: Use inline qualifier for all EX_TABLE and ALTERNATIVE inline assemblies s390/kfence: Split kfence pool into 4k mappings in arch_kfence_init_pool() s390/ptrace: Avoid KASAN false positives in regs_get_kernel_stack_nth() s390/boot: Ignore vmlinux.map s390/sysctl: Remove "vm/allocate_pgste" sysctl s390: Remove 2k vs 4k page table leftovers s390/tlb: Use mm_has_pgste() instead of mm_alloc_pgste() s390/lowcore: Use lghi instead llilh to clear register s390/syscall: Merge __do_syscall() and do_syscall() s390/spinlock: Implement SPINLOCK_LOCKVAL with inline assembly s390/smp: Implement raw_smp_processor_id() with inline assembly s390/current: Implement current with inline assembly s390/lowcore: Use inline qualifier for get_lowcore() inline assembly s390: Move s390 sysctls into their own file under arch/s390 s390/syscall: Simplify syscall_get_arguments() s390/vfio-ap: Notify userspace that guest's AP config changed when mdev removed s390: Remove ioremap_wt() and pgprot_writethrough() s390/mm: Add configurable STRICT_MM_TYPECHECKS s390/mm: Convert pgste_val() into function s390/mm: Convert pgprot_val() into function ... |
||
|
Linus Torvalds
|
1a9239bb42 |
Networking changes for 6.15.
Core & protocols
----------------
- Continue Netlink conversions to per-namespace RTNL lock
(IPv4 routing, routing rules, routing next hops, ARP ioctls).
- Continue extending the use of netdev instance locks. As a driver
opt-in protect queue operations and (in due course) ethtool
operations with the instance lock and not RTNL lock.
- Support collecting TCP timestamps (data submitted, sent, acked)
in BPF, allowing for transparent (to the application) and lower
overhead tracking of TCP RPC performance.
- Tweak existing networking Rx zero-copy infra to support zero-copy
Rx via io_uring.
- Optimize MPTCP performance in single subflow mode by 29%.
- Enable GRO on packets which went thru XDP CPU redirect (were queued
for processing on a different CPU). Improving TCP stream performance
up to 2x.
- Improve performance of contended connect() by 200% by searching
for an available 4-tuple under RCU rather than a spin lock.
Bring an additional 229% improvement by tweaking hash distribution.
- Avoid unconditionally touching sk_tsflags on RX, improving
performance under UDP flood by as much as 10%.
- Avoid skb_clone() dance in ping_rcv() to improve performance under
ping flood.
- Avoid FIB lookup in netfilter if socket is available, 20% perf win.
- Rework network device creation (in-kernel) API to more clearly
identify network namespaces and their roles.
There are up to 4 namespace roles but we used to have just 2 netns
pointer arguments, interpreted differently based on context.
- Use sysfs_break_active_protection() instead of trylock to avoid
deadlocks between unregistering objects and sysfs access.
- Add a new sysctl and sockopt for capping max retransmit timeout
in TCP.
- Support masking port and DSCP in routing rule matches.
- Support dumping IPv4 multicast addresses with RTM_GETMULTICAST.
- Support specifying at what time packet should be sent on AF_XDP
sockets.
- Expose TCP ULP diagnostic info (for TLS and MPTCP) to non-admin users.
- Add Netlink YAML spec for WiFi (nl80211) and conntrack.
- Introduce EXPORT_IPV6_MOD() and EXPORT_IPV6_MOD_GPL() for symbols
which only need to be exported when IPv6 support is built as a module.
- Age FDB entries based on Rx not Tx traffic in VxLAN, similar
to normal bridging.
- Allow users to specify source port range for GENEVE tunnels.
- netconsole: allow attaching kernel release, CPU ID and task name
to messages as metadata
Driver API
----------
- Continue rework / fixing of Energy Efficient Ethernet (EEE) across
the SW layers. Delegate the responsibilities to phylink where possible.
Improve its handling in phylib.
- Support symmetric OR-XOR RSS hashing algorithm.
- Support tracking and preserving IRQ affinity by NAPI itself.
- Support loopback mode speed selection for interface selftests.
Device drivers
--------------
- Remove the IBM LCS driver for s390.
- Remove the sb1000 cable modem driver.
- Add support for SFP module access over SMBus.
- Add MCTP transport driver for MCTP-over-USB.
- Enable XDP metadata support in multiple drivers.
- Ethernet high-speed NICs:
- Broadcom (bnxt):
- add PCIe TLP Processing Hints (TPH) support for new AMD platforms
- support dumping RoCE queue state for debug
- opt into instance locking
- Intel (100G, ice, idpf):
- ice: rework MSI-X IRQ management and distribution
- ice: support for E830 devices
- iavf: add support for Rx timestamping
- iavf: opt into instance locking
- nVidia/Mellanox:
- mlx4: use page pool memory allocator for Rx
- mlx5: support for one PTP device per hardware clock
- mlx5: support for 200Gbps per-lane link modes
- mlx5: move IPSec policy check after decryption
- AMD/Solarflare:
- support FW flashing via devlink
- Cisco (enic):
- use page pool memory allocator for Rx
- enable 32, 64 byte CQEs
- get max rx/tx ring size from the device
- Meta (fbnic):
- support flow steering and RSS configuration
- report queue stats
- support TCP segmentation
- support IRQ coalescing
- support ring size configuration
- Marvell/Cavium:
- support AF_XDP
- Wangxun:
- support for PTP clock and timestamping
- Huawei (hibmcge):
- checksum offload
- add more statistics
- Ethernet virtual:
- VirtIO net:
- aggressively suppress Tx completions, improve perf by 96% with
1 CPU and 55% with 2 CPUs
- expose NAPI to IRQ mapping and persist NAPI settings
- Google (gve):
- support XDP in DQO RDA Queue Format
- opt into instance locking
- Microsoft vNIC:
- support BIG TCP
- Ethernet NICs consumer, and embedded:
- Synopsys (stmmac):
- cleanup Tx and Tx clock setting and other link-focused cleanups
- enable SGMII and 2500BASEX mode switching for Intel platforms
- support Sophgo SG2044
- Broadcom switches (b53):
- support for BCM53101
- TI:
- iep: add perout configuration support
- icssg: support XDP
- Cadence (macb):
- implement BQL
- Xilinx (axinet):
- support dynamic IRQ moderation and changing coalescing at runtime
- implement BQL
- report standard stats
- MediaTek:
- support phylink managed EEE
- Intel:
- igc: don't restart the interface on every XDP program change
- RealTek (r8169):
- support reading registers of internal PHYs directly
- increase max jumbo packet size on RTL8125/RTL8126
- Airoha:
- support for RISC-V NPU packet processing unit
- enable scatter-gather and support MTU up to 9kB
- Tehuti (tn40xx):
- support cards with TN4010 MAC and an Aquantia AQR105 PHY
- Ethernet PHYs:
- support for TJA1102S, TJA1121
- dp83tg720: add randomized polling intervals for link detection
- dp83822: support changing the transmit amplitude voltage
- support for LEDs on 88q2xxx
- CAN:
- canxl: support Remote Request Substitution bit access
- flexcan: add S32G2/S32G3 SoC
- WiFi:
- remove cooked monitor support
- strict mode for better AP testing
- basic EPCS support
- OMI RX bandwidth reduction support
- batman-adv: add support for jumbo frames
- WiFi drivers:
- RealTek (rtw88):
- support RTL8814AE and RTL8814AU
- RealTek (rtw89):
- switch using wiphy_lock and wiphy_work
- add BB context to manipulate two PHY as preparation of MLO
- improve BT-coexistence mechanism to play A2DP smoothly
- Intel (iwlwifi):
- add new iwlmld sub-driver for latest HW/FW combinations
- MediaTek (mt76):
- preparation for mt7996 Multi-Link Operation (MLO) support
- Qualcomm/Atheros (ath12k):
- continued work on MLO
- Silabs (wfx):
- Wake-on-WLAN support
- Bluetooth:
- add support for skb TX SND/COMPLETION timestamping
- hci_core: enable buffer flow control for SCO/eSCO
- coredump: log devcd dumps into the monitor
- Bluetooth drivers:
- intel: add support to configure TX power
- nxp: handle bootloader error during cmd5 and cmd7
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Merge tag 'net-next-6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
Pull networking updates from Jakub Kicinski:
"Core & protocols:
- Continue Netlink conversions to per-namespace RTNL lock
(IPv4 routing, routing rules, routing next hops, ARP ioctls)
- Continue extending the use of netdev instance locks. As a driver
opt-in protect queue operations and (in due course) ethtool
operations with the instance lock and not RTNL lock.
- Support collecting TCP timestamps (data submitted, sent, acked) in
BPF, allowing for transparent (to the application) and lower
overhead tracking of TCP RPC performance.
- Tweak existing networking Rx zero-copy infra to support zero-copy
Rx via io_uring.
- Optimize MPTCP performance in single subflow mode by 29%.
- Enable GRO on packets which went thru XDP CPU redirect (were queued
for processing on a different CPU). Improving TCP stream
performance up to 2x.
- Improve performance of contended connect() by 200% by searching for
an available 4-tuple under RCU rather than a spin lock. Bring an
additional 229% improvement by tweaking hash distribution.
- Avoid unconditionally touching sk_tsflags on RX, improving
performance under UDP flood by as much as 10%.
- Avoid skb_clone() dance in ping_rcv() to improve performance under
ping flood.
- Avoid FIB lookup in netfilter if socket is available, 20% perf win.
- Rework network device creation (in-kernel) API to more clearly
identify network namespaces and their roles. There are up to 4
namespace roles but we used to have just 2 netns pointer arguments,
interpreted differently based on context.
- Use sysfs_break_active_protection() instead of trylock to avoid
deadlocks between unregistering objects and sysfs access.
- Add a new sysctl and sockopt for capping max retransmit timeout in
TCP.
- Support masking port and DSCP in routing rule matches.
- Support dumping IPv4 multicast addresses with RTM_GETMULTICAST.
- Support specifying at what time packet should be sent on AF_XDP
sockets.
- Expose TCP ULP diagnostic info (for TLS and MPTCP) to non-admin
users.
- Add Netlink YAML spec for WiFi (nl80211) and conntrack.
- Introduce EXPORT_IPV6_MOD() and EXPORT_IPV6_MOD_GPL() for symbols
which only need to be exported when IPv6 support is built as a
module.
- Age FDB entries based on Rx not Tx traffic in VxLAN, similar to
normal bridging.
- Allow users to specify source port range for GENEVE tunnels.
- netconsole: allow attaching kernel release, CPU ID and task name to
messages as metadata
Driver API:
- Continue rework / fixing of Energy Efficient Ethernet (EEE) across
the SW layers. Delegate the responsibilities to phylink where
possible. Improve its handling in phylib.
- Support symmetric OR-XOR RSS hashing algorithm.
- Support tracking and preserving IRQ affinity by NAPI itself.
- Support loopback mode speed selection for interface selftests.
Device drivers:
- Remove the IBM LCS driver for s390
- Remove the sb1000 cable modem driver
- Add support for SFP module access over SMBus
- Add MCTP transport driver for MCTP-over-USB
- Enable XDP metadata support in multiple drivers
- Ethernet high-speed NICs:
- Broadcom (bnxt):
- add PCIe TLP Processing Hints (TPH) support for new AMD
platforms
- support dumping RoCE queue state for debug
- opt into instance locking
- Intel (100G, ice, idpf):
- ice: rework MSI-X IRQ management and distribution
- ice: support for E830 devices
- iavf: add support for Rx timestamping
- iavf: opt into instance locking
- nVidia/Mellanox:
- mlx4: use page pool memory allocator for Rx
- mlx5: support for one PTP device per hardware clock
- mlx5: support for 200Gbps per-lane link modes
- mlx5: move IPSec policy check after decryption
- AMD/Solarflare:
- support FW flashing via devlink
- Cisco (enic):
- use page pool memory allocator for Rx
- enable 32, 64 byte CQEs
- get max rx/tx ring size from the device
- Meta (fbnic):
- support flow steering and RSS configuration
- report queue stats
- support TCP segmentation
- support IRQ coalescing
- support ring size configuration
- Marvell/Cavium:
- support AF_XDP
- Wangxun:
- support for PTP clock and timestamping
- Huawei (hibmcge):
- checksum offload
- add more statistics
- Ethernet virtual:
- VirtIO net:
- aggressively suppress Tx completions, improve perf by 96%
with 1 CPU and 55% with 2 CPUs
- expose NAPI to IRQ mapping and persist NAPI settings
- Google (gve):
- support XDP in DQO RDA Queue Format
- opt into instance locking
- Microsoft vNIC:
- support BIG TCP
- Ethernet NICs consumer, and embedded:
- Synopsys (stmmac):
- cleanup Tx and Tx clock setting and other link-focused
cleanups
- enable SGMII and 2500BASEX mode switching for Intel platforms
- support Sophgo SG2044
- Broadcom switches (b53):
- support for BCM53101
- TI:
- iep: add perout configuration support
- icssg: support XDP
- Cadence (macb):
- implement BQL
- Xilinx (axinet):
- support dynamic IRQ moderation and changing coalescing at
runtime
- implement BQL
- report standard stats
- MediaTek:
- support phylink managed EEE
- Intel:
- igc: don't restart the interface on every XDP program change
- RealTek (r8169):
- support reading registers of internal PHYs directly
- increase max jumbo packet size on RTL8125/RTL8126
- Airoha:
- support for RISC-V NPU packet processing unit
- enable scatter-gather and support MTU up to 9kB
- Tehuti (tn40xx):
- support cards with TN4010 MAC and an Aquantia AQR105 PHY
- Ethernet PHYs:
- support for TJA1102S, TJA1121
- dp83tg720: add randomized polling intervals for link detection
- dp83822: support changing the transmit amplitude voltage
- support for LEDs on 88q2xxx
- CAN:
- canxl: support Remote Request Substitution bit access
- flexcan: add S32G2/S32G3 SoC
- WiFi:
- remove cooked monitor support
- strict mode for better AP testing
- basic EPCS support
- OMI RX bandwidth reduction support
- batman-adv: add support for jumbo frames
- WiFi drivers:
- RealTek (rtw88):
- support RTL8814AE and RTL8814AU
- RealTek (rtw89):
- switch using wiphy_lock and wiphy_work
- add BB context to manipulate two PHY as preparation of MLO
- improve BT-coexistence mechanism to play A2DP smoothly
- Intel (iwlwifi):
- add new iwlmld sub-driver for latest HW/FW combinations
- MediaTek (mt76):
- preparation for mt7996 Multi-Link Operation (MLO) support
- Qualcomm/Atheros (ath12k):
- continued work on MLO
- Silabs (wfx):
- Wake-on-WLAN support
- Bluetooth:
- add support for skb TX SND/COMPLETION timestamping
- hci_core: enable buffer flow control for SCO/eSCO
- coredump: log devcd dumps into the monitor
- Bluetooth drivers:
- intel: add support to configure TX power
- nxp: handle bootloader error during cmd5 and cmd7"
* tag 'net-next-6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1681 commits)
unix: fix up for "apparmor: add fine grained af_unix mediation"
mctp: Fix incorrect tx flow invalidation condition in mctp-i2c
net: usb: asix: ax88772: Increase phy_name size
net: phy: Introduce PHY_ID_SIZE — minimum size for PHY ID string
net: libwx: fix Tx L4 checksum
net: libwx: fix Tx descriptor content for some tunnel packets
atm: Fix NULL pointer dereference
net: tn40xx: add pci-id of the aqr105-based Tehuti TN4010 cards
net: tn40xx: prepare tn40xx driver to find phy of the TN9510 card
net: tn40xx: create swnode for mdio and aqr105 phy and add to mdiobus
net: phy: aquantia: add essential functions to aqr105 driver
net: phy: aquantia: search for firmware-name in fwnode
net: phy: aquantia: add probe function to aqr105 for firmware loading
net: phy: Add swnode support to mdiobus_scan
gve: add XDP DROP and PASS support for DQ
gve: update XDP allocation path support RX buffer posting
gve: merge packet buffer size fields
gve: update GQ RX to use buf_size
gve: introduce config-based allocation for XDP
gve: remove xdp_xsk_done and xdp_xsk_wakeup statistics
...
|
||
|
Linus Torvalds
|
317a76a996 |
Updates for the VDSO infrastructure:
- Consolidate the VDSO storage
The VDSO data storage and data layout has been largely architecture
specific for historical reasons. That increases the maintenance effort
and causes inconsistencies over and over.
There is no real technical reason for architecture specific layouts and
implementations. The architecture specific details can easily be
integrated into a generic layout, which also reduces the amount of
duplicated code for managing the mappings.
Convert all architectures over to a unified layout and common mapping
infrastructure. This splits the VDSO data layout into subsystem
specific blocks, timekeeping, random and architecture parts, which
provides a better structure and allows to improve and update the
functionalities without conflict and interaction.
- Rework the timekeeping data storage
The current implementation is designed for exposing system timekeeping
accessors, which was good enough at the time when it was designed.
PTP and Time Sensitive Networking (TSN) change that as there are
requirements to expose independent PTP clocks, which are not related to
system timekeeping.
Replace the monolithic data storage by a structured layout, which
allows to add support for independent PTP clocks on top while reusing
both the data structures and the time accessor implementations.
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Merge tag 'timers-vdso-2025-03-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull VDSO infrastructure updates from Thomas Gleixner:
- Consolidate the VDSO storage
The VDSO data storage and data layout has been largely architecture
specific for historical reasons. That increases the maintenance
effort and causes inconsistencies over and over.
There is no real technical reason for architecture specific layouts
and implementations. The architecture specific details can easily be
integrated into a generic layout, which also reduces the amount of
duplicated code for managing the mappings.
Convert all architectures over to a unified layout and common mapping
infrastructure. This splits the VDSO data layout into subsystem
specific blocks, timekeeping, random and architecture parts, which
provides a better structure and allows to improve and update the
functionalities without conflict and interaction.
- Rework the timekeeping data storage
The current implementation is designed for exposing system
timekeeping accessors, which was good enough at the time when it was
designed.
PTP and Time Sensitive Networking (TSN) change that as there are
requirements to expose independent PTP clocks, which are not related
to system timekeeping.
Replace the monolithic data storage by a structured layout, which
allows to add support for independent PTP clocks on top while reusing
both the data structures and the time accessor implementations.
* tag 'timers-vdso-2025-03-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (55 commits)
sparc/vdso: Always reject undefined references during linking
x86/vdso: Always reject undefined references during linking
vdso: Rework struct vdso_time_data and introduce struct vdso_clock
vdso: Move architecture related data before basetime data
powerpc/vdso: Prepare introduction of struct vdso_clock
arm64/vdso: Prepare introduction of struct vdso_clock
x86/vdso: Prepare introduction of struct vdso_clock
time/namespace: Prepare introduction of struct vdso_clock
vdso/namespace: Rename timens_setup_vdso_data() to reflect new vdso_clock struct
vdso/vsyscall: Prepare introduction of struct vdso_clock
vdso/gettimeofday: Prepare helper functions for introduction of struct vdso_clock
vdso/gettimeofday: Prepare do_coarse_timens() for introduction of struct vdso_clock
vdso/gettimeofday: Prepare do_coarse() for introduction of struct vdso_clock
vdso/gettimeofday: Prepare do_hres_timens() for introduction of struct vdso_clock
vdso/gettimeofday: Prepare do_hres() for introduction of struct vdso_clock
vdso/gettimeofday: Prepare introduction of struct vdso_clock
vdso/helpers: Prepare introduction of struct vdso_clock
vdso/datapage: Define vdso_clock to prepare for multiple PTP clocks
vdso: Make vdso_time_data cacheline aligned
arm64: Make asm/cache.h compatible with vDSO
...
|
||
|
Linus Torvalds
|
327ecdbc0f |
Performance events updates for v6.15:
Core:
- Move perf_event sysctls into kernel/events/ (Joel Granados)
- Use POLLHUP for pinned events in error (Namhyung Kim)
- Avoid the read if the count is already updated (Peter Zijlstra)
- Allow the EPOLLRDNORM flag for poll (Tao Chen)
- locking/percpu-rwsem: Add guard support (Peter Zijlstra)
[ NOTE: this got (mis-)merged into the perf tree due to related work. ]
perf_pmu_unregister() related improvements: (Peter Zijlstra)
- Simplify the perf_event_alloc() error path
- Simplify the perf_pmu_register() error path
- Simplify perf_pmu_register()
- Simplify perf_init_event()
- Simplify perf_event_alloc()
- Merge struct pmu::pmu_disable_count into struct perf_cpu_pmu_context::pmu_disable_count
- Add this_cpc() helper
- Introduce perf_free_addr_filters()
- Robustify perf_event_free_bpf_prog()
- Simplify the perf_mmap() control flow
- Further simplify perf_mmap()
- Remove retry loop from perf_mmap()
- Lift event->mmap_mutex in perf_mmap()
- Detach 'struct perf_cpu_pmu_context' and 'struct pmu' lifetimes
- Fix perf_mmap() failure path
Uprobes:
- Harden x86 uretprobe syscall trampoline check (Jiri Olsa)
- Remove redundant spinlock in uprobe_deny_signal() (Liao Chang)
- Remove the spinlock within handle_singlestep() (Liao Chang)
x86 Intel PMU enhancements:
- Support PEBS counters snapshotting (Kan Liang)
- Fix intel_pmu_read_event() (Kan Liang)
- Extend per event callchain limit to branch stack (Kan Liang)
- Fix system-wide LBR profiling (Kan Liang)
- Allocate bts_ctx only if necessary (Li RongQing)
- Apply static call for drain_pebs (Peter Zijlstra)
x86 AMD PMU enhancements: (Ravi Bangoria)
- Remove pointless sample period check
- Fix ->config to sample period calculation for OP PMU
- Fix perf_ibs_op.cnt_mask for CurCnt
- Don't allow freq mode event creation through ->config interface
- Add PMU specific minimum period
- Add ->check_period() callback
- Ceil sample_period to min_period
- Add support for OP Load Latency Filtering
- Update DTLB/PageSize decode logic
Hardware breakpoints:
- Return EOPNOTSUPP for unsupported breakpoint type (Saket Kumar Bhaskar)
Hardlockup detector improvements: (Li Huafei)
- perf_event memory leak
- Warn if watchdog_ev is leaked
Fixes and cleanups:
- Misc fixes and cleanups (Andy Shevchenko, Kan Liang, Peter Zijlstra,
Ravi Bangoria, Thorsten Blum, XieLudan)
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'perf-core-2025-03-22' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull performance events updates from Ingo Molnar:
"Core:
- Move perf_event sysctls into kernel/events/ (Joel Granados)
- Use POLLHUP for pinned events in error (Namhyung Kim)
- Avoid the read if the count is already updated (Peter Zijlstra)
- Allow the EPOLLRDNORM flag for poll (Tao Chen)
- locking/percpu-rwsem: Add guard support [ NOTE: this got
(mis-)merged into the perf tree due to related work ] (Peter
Zijlstra)
perf_pmu_unregister() related improvements: (Peter Zijlstra)
- Simplify the perf_event_alloc() error path
- Simplify the perf_pmu_register() error path
- Simplify perf_pmu_register()
- Simplify perf_init_event()
- Simplify perf_event_alloc()
- Merge struct pmu::pmu_disable_count into struct
perf_cpu_pmu_context::pmu_disable_count
- Add this_cpc() helper
- Introduce perf_free_addr_filters()
- Robustify perf_event_free_bpf_prog()
- Simplify the perf_mmap() control flow
- Further simplify perf_mmap()
- Remove retry loop from perf_mmap()
- Lift event->mmap_mutex in perf_mmap()
- Detach 'struct perf_cpu_pmu_context' and 'struct pmu' lifetimes
- Fix perf_mmap() failure path
Uprobes:
- Harden x86 uretprobe syscall trampoline check (Jiri Olsa)
- Remove redundant spinlock in uprobe_deny_signal() (Liao Chang)
- Remove the spinlock within handle_singlestep() (Liao Chang)
x86 Intel PMU enhancements:
- Support PEBS counters snapshotting (Kan Liang)
- Fix intel_pmu_read_event() (Kan Liang)
- Extend per event callchain limit to branch stack (Kan Liang)
- Fix system-wide LBR profiling (Kan Liang)
- Allocate bts_ctx only if necessary (Li RongQing)
- Apply static call for drain_pebs (Peter Zijlstra)
x86 AMD PMU enhancements: (Ravi Bangoria)
- Remove pointless sample period check
- Fix ->config to sample period calculation for OP PMU
- Fix perf_ibs_op.cnt_mask for CurCnt
- Don't allow freq mode event creation through ->config interface
- Add PMU specific minimum period
- Add ->check_period() callback
- Ceil sample_period to min_period
- Add support for OP Load Latency Filtering
- Update DTLB/PageSize decode logic
Hardware breakpoints:
- Return EOPNOTSUPP for unsupported breakpoint type (Saket Kumar
Bhaskar)
Hardlockup detector improvements: (Li Huafei)
- perf_event memory leak
- Warn if watchdog_ev is leaked
Fixes and cleanups:
- Misc fixes and cleanups (Andy Shevchenko, Kan Liang, Peter
Zijlstra, Ravi Bangoria, Thorsten Blum, XieLudan)"
* tag 'perf-core-2025-03-22' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (55 commits)
perf: Fix __percpu annotation
perf: Clean up pmu specific data
perf/x86: Remove swap_task_ctx()
perf/x86/lbr: Fix shorter LBRs call stacks for the system-wide mode
perf: Supply task information to sched_task()
perf: attach/detach PMU specific data
locking/percpu-rwsem: Add guard support
perf: Save PMU specific data in task_struct
perf: Extend per event callchain limit to branch stack
perf/ring_buffer: Allow the EPOLLRDNORM flag for poll
perf/core: Use POLLHUP for pinned events in error
perf/core: Use sysfs_emit() instead of scnprintf()
perf/core: Remove optional 'size' arguments from strscpy() calls
perf/x86/intel/bts: Check if bts_ctx is allocated when calling BTS functions
uprobes/x86: Harden uretprobe syscall trampoline check
watchdog/hardlockup/perf: Warn if watchdog_ev is leaked
watchdog/hardlockup/perf: Fix perf_event memory leak
perf/x86: Annotate struct bts_buffer::buf with __counted_by()
perf/core: Clean up perf_try_init_event()
perf/core: Fix perf_mmap() failure path
...
|
||
|
Linus Torvalds
|
32b22538be |
Scheduler updates for v6.15:
[ Merge note, these two commits are identical:
-
|
||
|
Linus Torvalds
|
2f2d529458 |
bitmap changes for 6.15
This includes: - cpumask_next_wrap() rework from me; - GENMASK() simplification from I Hsin; - rust bindings for cpumasks from Viresh and me; - scattered cleanups from Andy, Tamir, Vincent, Ignacio and Joel. -----BEGIN PGP SIGNATURE----- iQGzBAABCgAdFiEEi8GdvG6xMhdgpu/4sUSA/TofvsgFAmfhicUACgkQsUSA/Tof vsiT1Av/TFpTFPcfb0/U6zTjhphqSkhCqBN4JcT+Qh1pyFN3Q8xh7FIRjqm6PoWb wypQTrsOuS1UImfxj2PkHPiagDHz3LBWRJ1WCBZPF3FgZaFdOtVDObn91APaX4Jz K7B2eghnDLk74+eV3aBLVCPgdFPm4Og+3W2J9loWDHYNBrlgQX/3T8gZzJcIzDxk 8jDiy84cGQweW3K6VDr7WGb/gDBTNXKByFig4+rzuW8X/VcUB1wZi1lHqTL3yBMm hXGsa8/VFLVKpRhZxx7PeTiXF+Wp4Tu7iyCuLVK9F9P9pY4GBZ9KV69yaeHLwlwF P4eA3Lj1KvtwmZYDT19lB8V0El7nZzcTHtmSgII8JEniWvuVQjjARicIqFqh6zmX QaLOt/gfGT/tr9nPzsFMgQxHV0ocibqWmM0gZyfEDsqIX0ynSh1fbMf52PrbBBSX aOaVV55HWIjHzLPzqvVee8JMaCwn4hNDrVaWItedQzZkf8aXKLk/GUWYaaEwQ8yY N7D3sXbT =Bm5k -----END PGP SIGNATURE----- Merge tag 'bitmap-for-6.15' of https://github.com/norov/linux Pull bitmap updates from Yury Norov: - cpumask_next_wrap() rework (me) - GENMASK() simplification (I Hsin) - rust bindings for cpumasks (Viresh and me) - scattered cleanups (Andy, Tamir, Vincent, Ignacio and Joel) * tag 'bitmap-for-6.15' of https://github.com/norov/linux: (22 commits) cpumask: align text in comment riscv: fix test_and_{set,clear}_bit ordering documentation treewide: fix typo 'unsigned __init128' -> 'unsigned __int128' MAINTAINERS: add rust bindings entry for bitmap API rust: Add cpumask helpers uapi: Revert "bitops: avoid integer overflow in GENMASK(_ULL)" cpumask: drop cpumask_next_wrap_old() PCI: hv: Switch hv_compose_multi_msi_req_get_cpu() to using cpumask_next_wrap() scsi: lpfc: rework lpfc_next_{online,present}_cpu() scsi: lpfc: switch lpfc_irq_rebalance() to using cpumask_next_wrap() s390: switch stop_machine_yield() to using cpumask_next_wrap() padata: switch padata_find_next() to using cpumask_next_wrap() cpumask: use cpumask_next_wrap() where appropriate cpumask: re-introduce cpumask_next{,_and}_wrap() cpumask: deprecate cpumask_next_wrap() powerpc/xmon: simplify xmon_batch_next_cpu() ibmvnic: simplify ibmvnic_set_queue_affinity() virtio_net: simplify virtnet_set_affinity() objpool: rework objpool_pop() cpumask: add for_each_{possible,online}_cpu_wrap ... |
||
|
Linus Torvalds
|
4f773fcbdb |
execve updates for v6.15-rc1
- elf: Define and use note name macros (Akihiko Odaki) - elf: add remaining SHF_ flag macros (Timur Tabi) - binfmt: Remove loader from linux_binprm struct (Yonatan Goldschmidt) - binfmt_elf_fdpic: fix variable set but not used warning (sunliming) -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQRSPkdeREjth1dHnSE2KwveOeQkuwUCZ9hJxQAKCRA2KwveOeQk uwhAAP9WXP77FCfAvJkmOfDI5FSa6g2WH/BnUOtZW63lSoXnTAEAuttg8W1IKcl/ Db+R/RLS3QqrU+ib5xWBeA6ZvxZXCwA= =Svn4 -----END PGP SIGNATURE----- Merge tag 'execve-v6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux Pull execve updates from Kees Cook: - elf: Define and use note name macros (Akihiko Odaki) - elf: add remaining SHF_ flag macros (Timur Tabi) - binfmt: Remove loader from linux_binprm struct (Yonatan Goldschmidt) - binfmt_elf_fdpic: fix variable set but not used warning (sunliming) * tag 'execve-v6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: binfmt_elf_fdpic: fix variable set but not used warning elf: add remaining SHF_ flag macros binfmt: Remove loader from linux_binprm struct crash: Remove KEXEC_CORE_NOTE_NAME s390/crash: Use note name macros crash: Use note name macros powerpc/crash: Use note name macros binfmt_elf: Use note name macros elf: Define note name macros |
||
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Linus Torvalds
|
fd101da676 |
vfs-6.15-rc1.mount
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Merge tag 'vfs-6.15-rc1.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull vfs mount updates from Christian Brauner:
- Mount notifications
The day has come where we finally provide a new api to listen for
mount topology changes outside of /proc/<pid>/mountinfo. A mount
namespace file descriptor can be supplied and registered with
fanotify to listen for mount topology changes.
Currently notifications for mount, umount and moving mounts are
generated. The generated notification record contains the unique
mount id of the mount.
The listmount() and statmount() api can be used to query detailed
information about the mount using the received unique mount id.
This allows userspace to figure out exactly how the mount topology
changed without having to generating diffs of /proc/<pid>/mountinfo
in userspace.
- Support O_PATH file descriptors with FSCONFIG_SET_FD in the new mount
api
- Support detached mounts in overlayfs
Since last cycle we support specifying overlayfs layers via file
descriptors. However, we don't allow detached mounts which means
userspace cannot user file descriptors received via
open_tree(OPEN_TREE_CLONE) and fsmount() directly. They have to
attach them to a mount namespace via move_mount() first.
This is cumbersome and means they have to undo mounts via umount().
Allow them to directly use detached mounts.
- Allow to retrieve idmappings with statmount
Currently it isn't possible to figure out what idmapping has been
attached to an idmapped mount. Add an extension to statmount() which
allows to read the idmapping from the mount.
- Allow creating idmapped mounts from mounts that are already idmapped
So far it isn't possible to allow the creation of idmapped mounts
from already idmapped mounts as this has significant lifetime
implications. Make the creation of idmapped mounts atomic by allow to
pass struct mount_attr together with the open_tree_attr() system call
allowing to solve these issues without complicating VFS lookup in any
way.
The system call has in general the benefit that creating a detached
mount and applying mount attributes to it becomes an atomic operation
for userspace.
- Add a way to query statmount() for supported options
Allow userspace to query which mount information can be retrieved
through statmount().
- Allow superblock owners to force unmount
* tag 'vfs-6.15-rc1.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: (21 commits)
umount: Allow superblock owners to force umount
selftests: add tests for mount notification
selinux: add FILE__WATCH_MOUNTNS
samples/vfs: fix printf format string for size_t
fs: allow changing idmappings
fs: add kflags member to struct mount_kattr
fs: add open_tree_attr()
fs: add copy_mount_setattr() helper
fs: add vfs_open_tree() helper
statmount: add a new supported_mask field
samples/vfs: add STATMOUNT_MNT_{G,U}IDMAP
selftests: add tests for using detached mount with overlayfs
samples/vfs: check whether flag was raised
statmount: allow to retrieve idmappings
uidgid: add map_id_range_up()
fs: allow detached mounts in clone_private_mount()
selftests/overlayfs: test specifying layers as O_PATH file descriptors
fs: support O_PATH fds with FSCONFIG_SET_FD
vfs: add notifications for mount attach and detach
fanotify: notify on mount attach and detach
...
|
||
|
Heiko Carstens
|
0dafe9968a |
s390: Use inline qualifier for all EX_TABLE and ALTERNATIVE inline assemblies
Use asm_inline for all inline assemblies which make use of the EX_TABLE or ALTERNATIVE macros. These macros expand to many lines and the compiler assumes the number of lines within an inline assembly is the same as the number of instructions within an inline assembly. This has an effect on inlining and loop unrolling decisions. In order to avoid incorrect assumptions use asm_inline, which tells the compiler that an inline assembly has the smallest possible size. In order to avoid confusion when asm_inline should be used or not, since a couple of inline assemblies are quite large: the rule is to always use asm_inline whenever the EX_TABLE or ALTERNATIVE macro is used. In specific cases there may be reasons to not follow this guideline, but that should be documented with the corresponding code. Using the inline qualifier everywhere has only a small effect on the kernel image size: add/remove: 0/10 grow/shrink: 19/8 up/down: 1492/-1858 (-366) The only location where this seems to matter is load_unaligned_zeropad() from word-at-a-time.h where the compiler inlines more functions within the dcache code, which is indeed code where performance matters. Suggested-by: Juergen Christ <jchrist@linux.ibm.com> Reviewed-by: Juergen Christ <jchrist@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> |
||
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Vasily Gorbik
|
d93a855c31 |
s390/ptrace: Avoid KASAN false positives in regs_get_kernel_stack_nth()
With recent ftrace changes, argument tracing has been added to the function tracer. As a result, ftrace opportunistically reads the first FTRACE_REGS_MAX_ARGS (i.e., 6) registers. On s390, only five arguments are passed in registers, and the 6-th is read from the stack. If a function has fewer than 6 arguments, the following KASAN report may be observed: BUG: KASAN: stack-out-of-bounds in regs_get_kernel_stack_nth+0xa8/0xb0 Read of size 8 at addr 00007f7fe066fdb8 by task swapper/31/0 CPU: 31 UID: 0 PID: 0 Comm: swapper/31 Not tainted 6.14.0-rc4-00006-g76fe0337c219 #16 Hardware name: IBM 3931 A01 704 (KVM/Linux) Call Trace: [<00007fffe0147224>] dump_stack_lvl+0x104/0x168 [<00007fffe011381c>] print_address_description.constprop.0+0x34/0x338 [<00007fffe0113b64>] print_report+0x44/0x138 [<00007fffe0ad9422>] kasan_report+0xc2/0x180 [<00007fffe0159ff8>] regs_get_kernel_stack_nth+0xa8/0xb0 [<00007fffe05ebeda>] trace_function+0x23a/0x4d0 [<00007fffe0615d32>] irqsoff_tracer_call+0xd2/0x110 [<00007fffe2b4e34c>] ftrace_common+0x1c/0x40 [<00007fffe0150826>] arch_cpu_idle_enter+0x6/0x10 [<00007fffe035a1c8>] do_idle+0x168/0x2e0 [<00007fffe035a9d0>] cpu_startup_entry+0x90/0xb0 [<00007fffe017d25a>] smp_start_secondary+0x3da/0x4e0 [<00007fffe2b4e20a>] restart_int_handler+0x72/0x88 no locks held by swapper/31/0. The buggy address belongs to stack of task swapper/31/0 and is located at offset 0 in frame: do_idle+0x0/0x2e0 This frame has 1 object: [32, 40) '__mask' The buggy address belongs to the virtual mapping at [00007f7fe0660000, 00007f7fe0671000) created by: dup_task_struct+0x66/0x4e0 The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x80f23 flags: 0x3ffff00000000000(node=0|zone=1|lastcpupid=0x1ffff) raw: 3ffff00000000000 0000000000000000 0000000000000122 0000000000000000 raw: 0000000000000000 0000000000000000 ffffffff00000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: 00007f7fe066fc80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00007f7fe066fd00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >00007f7fe066fd80: 00 00 00 00 00 00 00 f1 f1 f1 f1 00 f3 f3 f3 00 ^ 00007f7fe066fe00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00007f7fe066fe80: 00 f1 f1 f1 f1 00 f2 f2 f2 00 00 f3 f3 00 00 00 The function regs_get_kernel_stack_nth() verifies that the requested argument is located on the stack, making it safe to read even if it is not actually present. Make use of READ_ONCE_NOCHECK() helper to silence KASAN reports in this case. Reviewed-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> |
||
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Heiko Carstens
|
174cb82a57 |
s390: Remove 2k vs 4k page table leftovers
Since commit
|
||
|
Heiko Carstens
|
a0f2a8d051 |
s390/syscall: Merge __do_syscall() and do_syscall()
The compiler inlines do_syscall() into __do_syscall(). Therefore do this in C code as well, since this makes the code easier to understand. Also adjust and add various unlikely() and likely() annotations. Furthermore this allows to replace the separate exit_to_user_mode() and syscall_exit_to_user_mode_work() calls with a combined syscall_exit_to_user_mode() call which results in slightly better code. Acked-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> |
||
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Sebastian Andrzej Siewior
|
b70f50be0c |
s390: Rely on generic printing of preemption model
die() invokes later show_regs() -> show_regs_print_info() which prints the current preemption model. Remove it from the initial line. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Heiko Carstens <hca@linux.ibm.com> Link: https://lore.kernel.org/r/20250314160810.2373416-7-bigeasy@linutronix.de |
||
|
Kan Liang
|
d57e94f5b8 |
perf: Supply task information to sched_task()
To save/restore LBR call stack data in system-wide mode, the task_struct information is required. Extend the parameters of sched_task() to supply task_struct information. When schedule in, the LBR call stack data for new task will be restored. When schedule out, the LBR call stack data for old task will be saved. Only need to pass the required task_struct information. Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/r/20250314172700.438923-4-kan.liang@linux.intel.com |
||
|
Claudio Imbrenda
|
d8dfda5af0 |
KVM: s390: pv: fix race when making a page secure
Holding the pte lock for the page that is being converted to secure is
needed to avoid races. A previous commit removed the locking, which
caused issues. Fix by locking the pte again.
Fixes:
|
||
|
Paolo Abeni
|
941defcea7 |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Cross-merge networking fixes after downstream PR (net-6.14-rc6). Conflicts: tools/testing/selftests/drivers/net/ping.py |
||
|
Anna-Maria Behnsen
|
886653e366 |
vdso: Rework struct vdso_time_data and introduce struct vdso_clock
To support multiple PTP clocks, the VDSO data structure needs to be reworked. All clock specific data will end up in struct vdso_clock and in struct vdso_time_data there will be an array of VDSO clocks. Now that all preparatory changes are in place: Split the clock related struct members into a separate struct vdso_clock. Make sure all users are aware, that vdso_time_data is no longer initialized as an array and vdso_clock is now the array inside vdso_data. Remove the vdso_clock define, which mapped it to vdso_time_data for the transition. Signed-off-by: Anna-Maria Behnsen <anna-maria@linutronix.de> Signed-off-by: Nam Cao <namcao@linutronix.de> Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/all/20250303-vdso-clock-v1-19-c1b5c69a166f@linutronix.de |