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14,164 commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
Magnus Lindholm
|
403d1338a4 |
mm: pgtable: fix pte_swp_exclusive
Make pte_swp_exclusive return bool instead of int. This will better reflect how pte_swp_exclusive is actually used in the code. This fixes swap/swapoff problems on Alpha due pte_swp_exclusive not returning correct values when _PAGE_SWP_EXCLUSIVE bit resides in upper 32-bits of PTE (like on alpha). Suggested-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Magnus Lindholm <linmag7@gmail.com> Cc: Sam James <sam@gentoo.org> Link: https://lore.kernel.org/lkml/20250218175735.19882-2-linmag7@gmail.com/ Link: https://lore.kernel.org/lkml/20250602041118.GA2675383@ZenIV/ [ Applied as the 'sed' script Al suggested - Linus ] Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Linus Torvalds
|
0529ef8c36 |
A small set of x86 fixes:
- Cure IO bitmap inconsistencies
A failed fork cleans up all resources of the newly created thread via
exit_thread(). exit_thread() invokes io_bitmap_exit() which does the IO
bitmap cleanups, which unfortunately assume that the cleanup is related
to the current task, which is obviously bogus. Make it work correctly
- A lockdep fix in the resctrl code removed the clearing of the command
buffer in two places, which keeps stale error messages around. Bring
them back.
- Remove unused trace events
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Merge tag 'x86-urgent-2025-06-08' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Thomas Gleixner:
"A small set of x86 fixes:
- Cure IO bitmap inconsistencies
A failed fork cleans up all resources of the newly created thread
via exit_thread(). exit_thread() invokes io_bitmap_exit() which
does the IO bitmap cleanups, which unfortunately assume that the
cleanup is related to the current task, which is obviously bogus.
Make it work correctly
- A lockdep fix in the resctrl code removed the clearing of the
command buffer in two places, which keeps stale error messages
around. Bring them back.
- Remove unused trace events"
* tag 'x86-urgent-2025-06-08' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
fs/resctrl: Restore the rdt_last_cmd_clear() calls after acquiring rdtgroup_mutex
x86/iopl: Cure TIF_IO_BITMAP inconsistencies
x86/fpu: Remove unused trace events
|
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Linus Torvalds
|
c00b285024 |
hyperv-next for v6.16
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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
...
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|
Linus Torvalds
|
7d4e49a77d |
- The 3 patch series "hung_task: extend blocking task stacktrace dump to
semaphore" from Lance Yang enhances the hung task detector. The
detector presently dumps the blocking tasks's stack when it is blocked
on a mutex. Lance's series extends this to semaphores.
- The 2 patch series "nilfs2: improve sanity checks in dirty state
propagation" from Wentao Liang addresses a couple of minor flaws in
nilfs2.
- The 2 patch series "scripts/gdb: Fixes related to lx_per_cpu()" from
Illia Ostapyshyn fixes a couple of issues in the gdb scripts.
- The 9 patch series "Support kdump with LUKS encryption by reusing LUKS
volume keys" from Coiby Xu addresses a usability problem with kdump.
When the dump device is LUKS-encrypted, the kdump kernel may not have
the keys to the encrypted filesystem. A full writeup of this is in the
series [0/N] cover letter.
- The 2 patch series "sysfs: add counters for lockups and stalls" from
Max Kellermann adds /sys/kernel/hardlockup_count and
/sys/kernel/hardlockup_count and /sys/kernel/rcu_stall_count.
- The 3 patch series "fork: Page operation cleanups in the fork code"
from Pasha Tatashin implements a number of code cleanups in fork.c.
- The 3 patch series "scripts/gdb/symbols: determine KASLR offset on
s390 during early boot" from Ilya Leoshkevich fixes some s390 issues in
the gdb scripts.
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Merge tag 'mm-nonmm-stable-2025-05-31-15-28' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull non-MM updates from Andrew Morton:
- "hung_task: extend blocking task stacktrace dump to semaphore" from
Lance Yang enhances the hung task detector.
The detector presently dumps the blocking tasks's stack when it is
blocked on a mutex. Lance's series extends this to semaphores
- "nilfs2: improve sanity checks in dirty state propagation" from
Wentao Liang addresses a couple of minor flaws in nilfs2
- "scripts/gdb: Fixes related to lx_per_cpu()" from Illia Ostapyshyn
fixes a couple of issues in the gdb scripts
- "Support kdump with LUKS encryption by reusing LUKS volume keys" from
Coiby Xu addresses a usability problem with kdump.
When the dump device is LUKS-encrypted, the kdump kernel may not have
the keys to the encrypted filesystem. A full writeup of this is in
the series [0/N] cover letter
- "sysfs: add counters for lockups and stalls" from Max Kellermann adds
/sys/kernel/hardlockup_count and /sys/kernel/hardlockup_count and
/sys/kernel/rcu_stall_count
- "fork: Page operation cleanups in the fork code" from Pasha Tatashin
implements a number of code cleanups in fork.c
- "scripts/gdb/symbols: determine KASLR offset on s390 during early
boot" from Ilya Leoshkevich fixes some s390 issues in the gdb
scripts
* tag 'mm-nonmm-stable-2025-05-31-15-28' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (67 commits)
llist: make llist_add_batch() a static inline
delayacct: remove redundant code and adjust indentation
squashfs: add optional full compressed block caching
crash_dump, nvme: select CONFIGFS_FS as built-in
scripts/gdb/symbols: determine KASLR offset on s390 during early boot
scripts/gdb/symbols: factor out pagination_off()
scripts/gdb/symbols: factor out get_vmlinux()
kernel/panic.c: format kernel-doc comments
mailmap: update and consolidate Casey Connolly's name and email
nilfs2: remove wbc->for_reclaim handling
fork: define a local GFP_VMAP_STACK
fork: check charging success before zeroing stack
fork: clean-up naming of vm_stack/vm_struct variables in vmap stacks code
fork: clean-up ifdef logic around stack allocation
kernel/rcu/tree_stall: add /sys/kernel/rcu_stall_count
kernel/watchdog: add /sys/kernel/{hard,soft}lockup_count
x86/crash: make the page that stores the dm crypt keys inaccessible
x86/crash: pass dm crypt keys to kdump kernel
Revert "x86/mm: Remove unused __set_memory_prot()"
crash_dump: retrieve dm crypt keys in kdump kernel
...
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Linus Torvalds
|
00c010e130 |
- The 11 patch series "Add folio_mk_pte()" from Matthew Wilcox
simplifies the act of creating a pte which addresses the first page in a folio and reduces the amount of plumbing which architecture must implement to provide this. - The 8 patch series "Misc folio patches for 6.16" from Matthew Wilcox is a shower of largely unrelated folio infrastructure changes which clean things up and better prepare us for future work. - The 3 patch series "memory,x86,acpi: hotplug memory alignment advisement" from Gregory Price adds early-init code to prevent x86 from leaving physical memory unused when physical address regions are not aligned to memory block size. - The 2 patch series "mm/compaction: allow more aggressive proactive compaction" from Michal Clapinski provides some tuning of the (sadly, hard-coded (more sadly, not auto-tuned)) thresholds for our invokation of proactive compaction. In a simple test case, the reduction of a guest VM's memory consumption was dramatic. - The 8 patch series "Minor cleanups and improvements to swap freeing code" from Kemeng Shi provides some code cleaups and a small efficiency improvement to this part of our swap handling code. - The 6 patch series "ptrace: introduce PTRACE_SET_SYSCALL_INFO API" from Dmitry Levin adds the ability for a ptracer to modify syscalls arguments. At this time we can alter only "system call information that are used by strace system call tampering, namely, syscall number, syscall arguments, and syscall return value. This series should have been incorporated into mm.git's "non-MM" branch, but I goofed. - The 3 patch series "fs/proc: extend the PAGEMAP_SCAN ioctl to report guard regions" from Andrei Vagin extends the info returned by the PAGEMAP_SCAN ioctl against /proc/pid/pagemap. This permits CRIU to more efficiently get at the info about guard regions. - The 2 patch series "Fix parameter passed to page_mapcount_is_type()" from Gavin Shan implements that fix. No runtime effect is expected because validate_page_before_insert() happens to fix up this error. - The 3 patch series "kernel/events/uprobes: uprobe_write_opcode() rewrite" from David Hildenbrand basically brings uprobe text poking into the current decade. Remove a bunch of hand-rolled implementation in favor of using more current facilities. - The 3 patch series "mm/ptdump: Drop assumption that pxd_val() is u64" from Anshuman Khandual provides enhancements and generalizations to the pte dumping code. This might be needed when 128-bit Page Table Descriptors are enabled for ARM. - The 12 patch series "Always call constructor for kernel page tables" from Kevin Brodsky "ensures that the ctor/dtor is always called for kernel pgtables, as it already is for user pgtables". This permits the addition of more functionality such as "insert hooks to protect page tables". This change does result in various architectures performing unnecesary work, but this is fixed up where it is anticipated to occur. - The 9 patch series "Rust support for mm_struct, vm_area_struct, and mmap" from Alice Ryhl adds plumbing to permit Rust access to core MM structures. - The 3 patch series "fix incorrectly disallowed anonymous VMA merges" from Lorenzo Stoakes takes advantage of some VMA merging opportunities which we've been missing for 15 years. - The 4 patch series "mm/madvise: batch tlb flushes for MADV_DONTNEED and MADV_FREE" from SeongJae Park optimizes process_madvise()'s TLB flushing. Instead of flushing each address range in the provided iovec, we batch the flushing across all the iovec entries. The syscall's cost was approximately halved with a microbenchmark which was designed to load this particular operation. - The 6 patch series "Track node vacancy to reduce worst case allocation counts" from Sidhartha Kumar makes the maple tree smarter about its node preallocation. stress-ng mmap performance increased by single-digit percentages and the amount of unnecessarily preallocated memory was dramaticelly reduced. - The 3 patch series "mm/gup: Minor fix, cleanup and improvements" from Baoquan He removes a few unnecessary things which Baoquan noted when reading the code. - The 3 patch series ""Enhance sysfs handling for memory hotplug in weighted interleave" from Rakie Kim "enhances the weighted interleave policy in the memory management subsystem by improving sysfs handling, fixing memory leaks, and introducing dynamic sysfs updates for memory hotplug support". Fixes things on error paths which we are unlikely to hit. - The 7 patch series "mm/damon: auto-tune DAMOS for NUMA setups including tiered memory" from SeongJae Park introduces new DAMOS quota goal metrics which eliminate the manual tuning which is required when utilizing DAMON for memory tiering. - The 5 patch series "mm/vmalloc.c: code cleanup and improvements" from Baoquan He provides cleanups and small efficiency improvements which Baoquan found via code inspection. - The 2 patch series "vmscan: enforce mems_effective during demotion" from Gregory Price "changes reclaim to respect cpuset.mems_effective during demotion when possible". because "presently, reclaim explicitly ignores cpuset.mems_effective when demoting, which may cause the cpuset settings to violated." "This is useful for isolating workloads on a multi-tenant system from certain classes of memory more consistently." - The 2 patch series ""Clean up split_huge_pmd_locked() and remove unnecessary folio pointers" from Gavin Guo provides minor cleanups and efficiency gains in in the huge page splitting and migrating code. - The 3 patch series "Use kmem_cache for memcg alloc" from Huan Yang creates a slab cache for `struct mem_cgroup', yielding improved memory utilization. - The 4 patch series "add max arg to swappiness in memory.reclaim and lru_gen" from Zhongkun He adds a new "max" argument to the "swappiness=" argument for memory.reclaim MGLRU's lru_gen. This directs proactive reclaim to reclaim from only anon folios rather than file-backed folios. - The 17 patch series "kexec: introduce Kexec HandOver (KHO)" from Mike Rapoport is the first step on the path to permitting the kernel to maintain existing VMs while replacing the host kernel via file-based kexec. At this time only memblock's reserve_mem is preserved. - The 7 patch series "mm: Introduce for_each_valid_pfn()" from David Woodhouse provides and uses a smarter way of looping over a pfn range. By skipping ranges of invalid pfns. - The 2 patch series "sched/numa: Skip VMA scanning on memory pinned to one NUMA node via cpuset.mems" from Libo Chen removes a lot of pointless VMA scanning when a task is pinned a single NUMA mode. Dramatic performance benefits were seen in some real world cases. - The 2 patch series "JFS: Implement migrate_folio for jfs_metapage_aops" from Shivank Garg addresses a warning which occurs during memory compaction when using JFS. - The 4 patch series "move all VMA allocation, freeing and duplication logic to mm" from Lorenzo Stoakes moves some VMA code from kernel/fork.c into the more appropriate mm/vma.c. - The 6 patch series "mm, swap: clean up swap cache mapping helper" from Kairui Song provides code consolidation and cleanups related to the folio_index() function. - The 2 patch series "mm/gup: Cleanup memfd_pin_folios()" from Vishal Moola does that. - The 8 patch series "memcg: Fix test_memcg_min/low test failures" from Waiman Long addresses some bogus failures which are being reported by the test_memcontrol selftest. - The 3 patch series "eliminate mmap() retry merge, add .mmap_prepare hook" from Lorenzo Stoakes commences the deprecation of file_operations.mmap() in favor of the new file_operations.mmap_prepare(). The latter is more restrictive and prevents drivers from messing with things in ways which, amongst other problems, may defeat VMA merging. - The 4 patch series "memcg: decouple memcg and objcg stocks"" from Shakeel Butt decouples the per-cpu memcg charge cache from the objcg's one. This is a step along the way to making memcg and objcg charging NMI-safe, which is a BPF requirement. - The 6 patch series "mm/damon: minor fixups and improvements for code, tests, and documents" from SeongJae Park is "yet another batch of miscellaneous DAMON changes. Fix and improve minor problems in code, tests and documents." - The 7 patch series "memcg: make memcg stats irq safe" from Shakeel Butt converts memcg stats to be irq safe. Another step along the way to making memcg charging and stats updates NMI-safe, a BPF requirement. - The 4 patch series "Let unmap_hugepage_range() and several related functions take folio instead of page" from Fan Ni provides folio conversions in the hugetlb code. -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQTTMBEPP41GrTpTJgfdBJ7gKXxAjgUCaDt5qgAKCRDdBJ7gKXxA ju6XAP9nTiSfRz8Cz1n5LJZpFKEGzLpSihCYyR6P3o1L9oe3mwEAlZ5+XAwk2I5x Qqb/UGMEpilyre1PayQqOnct3aSL9Ao= =tYYm -----END PGP SIGNATURE----- Merge tag 'mm-stable-2025-05-31-14-50' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull MM updates from Andrew Morton: - "Add folio_mk_pte()" from Matthew Wilcox simplifies the act of creating a pte which addresses the first page in a folio and reduces the amount of plumbing which architecture must implement to provide this. - "Misc folio patches for 6.16" from Matthew Wilcox is a shower of largely unrelated folio infrastructure changes which clean things up and better prepare us for future work. - "memory,x86,acpi: hotplug memory alignment advisement" from Gregory Price adds early-init code to prevent x86 from leaving physical memory unused when physical address regions are not aligned to memory block size. - "mm/compaction: allow more aggressive proactive compaction" from Michal Clapinski provides some tuning of the (sadly, hard-coded (more sadly, not auto-tuned)) thresholds for our invokation of proactive compaction. In a simple test case, the reduction of a guest VM's memory consumption was dramatic. - "Minor cleanups and improvements to swap freeing code" from Kemeng Shi provides some code cleaups and a small efficiency improvement to this part of our swap handling code. - "ptrace: introduce PTRACE_SET_SYSCALL_INFO API" from Dmitry Levin adds the ability for a ptracer to modify syscalls arguments. At this time we can alter only "system call information that are used by strace system call tampering, namely, syscall number, syscall arguments, and syscall return value. This series should have been incorporated into mm.git's "non-MM" branch, but I goofed. - "fs/proc: extend the PAGEMAP_SCAN ioctl to report guard regions" from Andrei Vagin extends the info returned by the PAGEMAP_SCAN ioctl against /proc/pid/pagemap. This permits CRIU to more efficiently get at the info about guard regions. - "Fix parameter passed to page_mapcount_is_type()" from Gavin Shan implements that fix. No runtime effect is expected because validate_page_before_insert() happens to fix up this error. - "kernel/events/uprobes: uprobe_write_opcode() rewrite" from David Hildenbrand basically brings uprobe text poking into the current decade. Remove a bunch of hand-rolled implementation in favor of using more current facilities. - "mm/ptdump: Drop assumption that pxd_val() is u64" from Anshuman Khandual provides enhancements and generalizations to the pte dumping code. This might be needed when 128-bit Page Table Descriptors are enabled for ARM. - "Always call constructor for kernel page tables" from Kevin Brodsky ensures that the ctor/dtor is always called for kernel pgtables, as it already is for user pgtables. This permits the addition of more functionality such as "insert hooks to protect page tables". This change does result in various architectures performing unnecesary work, but this is fixed up where it is anticipated to occur. - "Rust support for mm_struct, vm_area_struct, and mmap" from Alice Ryhl adds plumbing to permit Rust access to core MM structures. - "fix incorrectly disallowed anonymous VMA merges" from Lorenzo Stoakes takes advantage of some VMA merging opportunities which we've been missing for 15 years. - "mm/madvise: batch tlb flushes for MADV_DONTNEED and MADV_FREE" from SeongJae Park optimizes process_madvise()'s TLB flushing. Instead of flushing each address range in the provided iovec, we batch the flushing across all the iovec entries. The syscall's cost was approximately halved with a microbenchmark which was designed to load this particular operation. - "Track node vacancy to reduce worst case allocation counts" from Sidhartha Kumar makes the maple tree smarter about its node preallocation. stress-ng mmap performance increased by single-digit percentages and the amount of unnecessarily preallocated memory was dramaticelly reduced. - "mm/gup: Minor fix, cleanup and improvements" from Baoquan He removes a few unnecessary things which Baoquan noted when reading the code. - ""Enhance sysfs handling for memory hotplug in weighted interleave" from Rakie Kim "enhances the weighted interleave policy in the memory management subsystem by improving sysfs handling, fixing memory leaks, and introducing dynamic sysfs updates for memory hotplug support". Fixes things on error paths which we are unlikely to hit. - "mm/damon: auto-tune DAMOS for NUMA setups including tiered memory" from SeongJae Park introduces new DAMOS quota goal metrics which eliminate the manual tuning which is required when utilizing DAMON for memory tiering. - "mm/vmalloc.c: code cleanup and improvements" from Baoquan He provides cleanups and small efficiency improvements which Baoquan found via code inspection. - "vmscan: enforce mems_effective during demotion" from Gregory Price changes reclaim to respect cpuset.mems_effective during demotion when possible. because presently, reclaim explicitly ignores cpuset.mems_effective when demoting, which may cause the cpuset settings to violated. This is useful for isolating workloads on a multi-tenant system from certain classes of memory more consistently. - "Clean up split_huge_pmd_locked() and remove unnecessary folio pointers" from Gavin Guo provides minor cleanups and efficiency gains in in the huge page splitting and migrating code. - "Use kmem_cache for memcg alloc" from Huan Yang creates a slab cache for `struct mem_cgroup', yielding improved memory utilization. - "add max arg to swappiness in memory.reclaim and lru_gen" from Zhongkun He adds a new "max" argument to the "swappiness=" argument for memory.reclaim MGLRU's lru_gen. This directs proactive reclaim to reclaim from only anon folios rather than file-backed folios. - "kexec: introduce Kexec HandOver (KHO)" from Mike Rapoport is the first step on the path to permitting the kernel to maintain existing VMs while replacing the host kernel via file-based kexec. At this time only memblock's reserve_mem is preserved. - "mm: Introduce for_each_valid_pfn()" from David Woodhouse provides and uses a smarter way of looping over a pfn range. By skipping ranges of invalid pfns. - "sched/numa: Skip VMA scanning on memory pinned to one NUMA node via cpuset.mems" from Libo Chen removes a lot of pointless VMA scanning when a task is pinned a single NUMA mode. Dramatic performance benefits were seen in some real world cases. - "JFS: Implement migrate_folio for jfs_metapage_aops" from Shivank Garg addresses a warning which occurs during memory compaction when using JFS. - "move all VMA allocation, freeing and duplication logic to mm" from Lorenzo Stoakes moves some VMA code from kernel/fork.c into the more appropriate mm/vma.c. - "mm, swap: clean up swap cache mapping helper" from Kairui Song provides code consolidation and cleanups related to the folio_index() function. - "mm/gup: Cleanup memfd_pin_folios()" from Vishal Moola does that. - "memcg: Fix test_memcg_min/low test failures" from Waiman Long addresses some bogus failures which are being reported by the test_memcontrol selftest. - "eliminate mmap() retry merge, add .mmap_prepare hook" from Lorenzo Stoakes commences the deprecation of file_operations.mmap() in favor of the new file_operations.mmap_prepare(). The latter is more restrictive and prevents drivers from messing with things in ways which, amongst other problems, may defeat VMA merging. - "memcg: decouple memcg and objcg stocks"" from Shakeel Butt decouples the per-cpu memcg charge cache from the objcg's one. This is a step along the way to making memcg and objcg charging NMI-safe, which is a BPF requirement. - "mm/damon: minor fixups and improvements for code, tests, and documents" from SeongJae Park is yet another batch of miscellaneous DAMON changes. Fix and improve minor problems in code, tests and documents. - "memcg: make memcg stats irq safe" from Shakeel Butt converts memcg stats to be irq safe. Another step along the way to making memcg charging and stats updates NMI-safe, a BPF requirement. - "Let unmap_hugepage_range() and several related functions take folio instead of page" from Fan Ni provides folio conversions in the hugetlb code. * tag 'mm-stable-2025-05-31-14-50' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (285 commits) mm: pcp: increase pcp->free_count threshold to trigger free_high mm/hugetlb: convert use of struct page to folio in __unmap_hugepage_range() mm/hugetlb: refactor __unmap_hugepage_range() to take folio instead of page mm/hugetlb: refactor unmap_hugepage_range() to take folio instead of page mm/hugetlb: pass folio instead of page to unmap_ref_private() memcg: objcg stock trylock without irq disabling memcg: no stock lock for cpu hot-unplug memcg: make __mod_memcg_lruvec_state re-entrant safe against irqs memcg: make count_memcg_events re-entrant safe against irqs memcg: make mod_memcg_state re-entrant safe against irqs memcg: move preempt disable to callers of memcg_rstat_updated memcg: memcg_rstat_updated re-entrant safe against irqs mm: khugepaged: decouple SHMEM and file folios' collapse selftests/eventfd: correct test name and improve messages alloc_tag: check mem_profiling_support in alloc_tag_init Docs/damon: update titles and brief introductions to explain DAMOS selftests/damon/_damon_sysfs: read tried regions directories in order mm/damon/tests/core-kunit: add a test for damos_set_filters_default_reject() mm/damon/paddr: remove unused variable, folio_list, in damon_pa_stat() mm/damon/sysfs-schemes: fix wrong comment on damons_sysfs_quota_goal_metric_strs ... |
||
Steven Rostedt
|
99850a1c93 |
x86/fpu: Remove unused trace events
The following trace events are not used and defining them just wastes memory: x86_fpu_before_restore x86_fpu_after_restore x86_fpu_init_state Simply remove them. Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Linux Trace Kernel <linux-trace-kernel@vger.kernel.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Oleg Nesterov <oleg@redhat.com> Link: https://lore.kernel.org/all/20250529130138.544ffec4@gandalf.local.home # background Link: https://lore.kernel.org/r/20250529131024.7c2ef96f@gandalf.local.home # x86 submission |
||
|
Linus Torvalds
|
ae5ec8adb8 |
tsm for 6.16
- Add a general sysfs scheme for publishing "Measurement" values
provided by the architecture's TEE Security Manager. Use it to publish
TDX "Runtime Measurement Registers" ("RTMRs") that either maintain a
hash of stored values (similar to a TPM PCR) or provide statically
provisioned data. These measurements are validated by a relying party.
- Reorganize the drivers/virt/coco/ directory for "host" and "guest"
shared infrastructure.
- Fix a configfs-tsm-report unregister bug
- With CONFIG_TSM_MEASUREMENTS joining CONFIG_TSM_REPORTS and in
anticipation of more shared "TSM" infrastructure arriving, rename the
maintainer entry to "TRUSTED SECURITY MODULE (TSM) INFRASTRUCTURE".
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Merge tag 'tsm-for-6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/devsec/tsm
Pull trusted security manager (TSM) updates from Dan Williams:
- Add a general sysfs scheme for publishing "Measurement" values
provided by the architecture's TEE Security Manager. Use it to
publish TDX "Runtime Measurement Registers" ("RTMRs") that either
maintain a hash of stored values (similar to a TPM PCR) or provide
statically provisioned data. These measurements are validated by a
relying party.
- Reorganize the drivers/virt/coco/ directory for "host" and "guest"
shared infrastructure.
- Fix a configfs-tsm-report unregister bug
- With CONFIG_TSM_MEASUREMENTS joining CONFIG_TSM_REPORTS and in
anticipation of more shared "TSM" infrastructure arriving, rename the
maintainer entry to "TRUSTED SECURITY MODULE (TSM) INFRASTRUCTURE".
* tag 'tsm-for-6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/devsec/tsm:
tsm-mr: Fix init breakage after bin_attrs constification by scoping non-const pointers to init phase
sample/tsm-mr: Fix missing static for sample_report
virt: tdx-guest: Transition to scoped_cond_guard for mutex operations
virt: tdx-guest: Refactor and streamline TDREPORT generation
virt: tdx-guest: Expose TDX MRs as sysfs attributes
x86/tdx: tdx_mcall_get_report0: Return -EBUSY on TDCALL_OPERAND_BUSY error
x86/tdx: Add tdx_mcall_extend_rtmr() interface
tsm-mr: Add tsm-mr sample code
tsm-mr: Add TVM Measurement Register support
configfs-tsm-report: Fix NULL dereference of tsm_ops
coco/guest: Move shared guest CC infrastructure to drivers/virt/coco/guest/
configfs-tsm: Namespace TSM report symbols
|
||
|
Linus Torvalds
|
43db111107 |
ARM:
* Add large stage-2 mapping (THP) support for non-protected guests when pKVM is enabled, clawing back some performance. * Enable nested virtualisation support on systems that support it, though it is disabled by default. * Add UBSAN support to the standalone EL2 object used in nVHE/hVHE and protected modes. * Large rework of the way KVM tracks architecture features and links them with the effects of control bits. While this has no functional impact, it ensures correctness of emulation (the data is automatically extracted from the published JSON files), and helps dealing with the evolution of the architecture. * Significant changes to the way pKVM tracks ownership of pages, avoiding page table walks by storing the state in the hypervisor's vmemmap. This in turn enables the THP support described above. * New selftest checking the pKVM ownership transition rules * Fixes for FEAT_MTE_ASYNC being accidentally advertised to guests even if the host didn't have it. * Fixes for the address translation emulation, which happened to be rather buggy in some specific contexts. * Fixes for the PMU emulation in NV contexts, decoupling PMCR_EL0.N from the number of counters exposed to a guest and addressing a number of issues in the process. * Add a new selftest for the SVE host state being corrupted by a guest. * Keep HCR_EL2.xMO set at all times for systems running with the kernel at EL2, ensuring that the window for interrupts is slightly bigger, and avoiding a pretty bad erratum on the AmpereOne HW. * Add workaround for AmpereOne's erratum AC04_CPU_23, which suffers from a pretty bad case of TLB corruption unless accesses to HCR_EL2 are heavily synchronised. * Add a per-VM, per-ITS debugfs entry to dump the state of the ITS tables in a human-friendly fashion. * and the usual random cleanups. LoongArch: * Don't flush tlb if the host supports hardware page table walks. * Add KVM selftests support. RISC-V: * Add vector registers to get-reg-list selftest * VCPU reset related improvements * Remove scounteren initialization from VCPU reset * Support VCPU reset from userspace using set_mpstate() ioctl x86: * Initial support for TDX in KVM. This finally makes it possible to use the TDX module to run confidential guests on Intel processors. This is quite a large series, including support for private page tables (managed by the TDX module and mirrored in KVM for efficiency), forwarding some TDVMCALLs to userspace, and handling several special VM exits from the TDX module. This has been in the works for literally years and it's not really possible to describe everything here, so I'll defer to the various merge commits up to and including commit |
||
|
Linus Torvalds
|
dd3922cf9d |
Add a virtual TPM driver glue which allows a guest kernel to talk to a TPM
device emulated by a Secure VM Service Module (SVSM) - a helper module of sorts which runs at a different privilege level in the SEV-SNP VM stack. The intent being that a TPM device is emulated by a trusted entity and not by the untrusted host which is the default assumption in the confidential computing scenarios. -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEzv7L6UO9uDPlPSfHEsHwGGHeVUoFAmg0vOoACgkQEsHwGGHe VUo44hAAqro0GkugpytbwYnNSnT2q0C7SoYghvKXmrGJiv/hn/5Q+cYh0AfIRsR0 hVRymTuyGSODjqUSOycMcTMbpQMVryjc2X0rK4MAWs9PKyIaLJVZh7vW497i00q5 Nl0kE+HzjZ44kF8udIBsYKS1qFfNyn11eE3xbFVVcHBCee0n775aOXWBup2d+G7u +BnskBbDuV3umlce6oDrmhmtKF6PfFMSx5E4YTCrXBDEPYwJemxbdw+N6AXY6cme mSJe8zwqrz+FX8653O6j9DsZgniIY/XhZd3tJ8QECY+DBRW1ldUt+k1zKeAeeVhc oqLJGtyVd3cmfx+ZhvLh1VIMHpihkAfzl6gZoNTvUP9m3aGKz44xbL3aiA5UDdDo DpQek8fInKA0iyWg6SHU+phRuvCXVXorcmIegSdYj3hzOc29AyEkcgfeIwzcbAE+ fuWO9SlGFqa/872d8z1AtSISTB6gWh0KqLaphdfmYmkZljNpKC0bs40788ymWOg8 iZPUj1ffP+Jy8/CGiOSmM5sq2Msy3D1JoIwciaIDo80OqsYDEvp7cwrp+w82T0yH clQu+WZNCFYr6OLgrUq7pr0WDa8h8a5ifMaPjpaYl6V4TvDiAo97t5/yWJXTInzS 1HbckXH4BF4spgNDjX4wbDHhfoRC7ac4IqhGOL5ngI2vIWLijXo= =tbNN -----END PGP SIGNATURE----- Merge tag 'x86_sev_for_v6.16_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull AMD SEV update from Borislav Petkov: "Add a virtual TPM driver glue which allows a guest kernel to talk to a TPM device emulated by a Secure VM Service Module (SVSM) - a helper module of sorts which runs at a different privilege level in the SEV-SNP VM stack. The intent being that a TPM device is emulated by a trusted entity and not by the untrusted host which is the default assumption in the confidential computing scenarios" * tag 'x86_sev_for_v6.16_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/sev: Register tpm-svsm platform device tpm: Add SNP SVSM vTPM driver svsm: Add header with SVSM_VTPM_CMD helpers x86/sev: Add SVSM vTPM probe/send_command functions |
||
|
Linus Torvalds
|
664a231d90 |
Carve out the resctrl filesystem-related code into fs/resctrl/ so that
multiple architectures can share the fs API for manipulating their
respective hw resource control implementation. This is the second step
in the work towards sharing the resctrl filesystem interface, the next
one being plugging ARM's MPAM into the aforementioned fs API.
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Merge tag 'x86_cache_for_v6.16_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 resource control updates from Borislav Petkov:
"Carve out the resctrl filesystem-related code into fs/resctrl/ so that
multiple architectures can share the fs API for manipulating their
respective hw resource control implementation.
This is the second step in the work towards sharing the resctrl
filesystem interface, the next one being plugging ARM's MPAM into the
aforementioned fs API"
* tag 'x86_cache_for_v6.16_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (25 commits)
MAINTAINERS: Add reviewers for fs/resctrl
x86,fs/resctrl: Move the resctrl filesystem code to live in /fs/resctrl
x86/resctrl: Always initialise rid field in rdt_resources_all[]
x86/resctrl: Relax some asm #includes
x86/resctrl: Prefer alloc(sizeof(*foo)) idiom in rdt_init_fs_context()
x86/resctrl: Squelch whitespace anomalies in resctrl core code
x86/resctrl: Move pseudo lock prototypes to include/linux/resctrl.h
x86/resctrl: Fix types in resctrl_arch_mon_ctx_{alloc,free}() stubs
x86/resctrl: Move enum resctrl_event_id to resctrl.h
x86/resctrl: Move the filesystem bits to headers visible to fs/resctrl
fs/resctrl: Add boiler plate for external resctrl code
x86/resctrl: Add 'resctrl' to the title of the resctrl documentation
x86/resctrl: Split trace.h
x86/resctrl: Expand the width of domid by replacing mon_data_bits
x86/resctrl: Add end-marker to the resctrl_event_id enum
x86/resctrl: Move is_mba_sc() out of core.c
x86/resctrl: Drop __init/__exit on assorted symbols
x86/resctrl: Resctrl_exit() teardown resctrl but leave the mount point
x86/resctrl: Check all domains are offline in resctrl_exit()
x86/resctrl: Rename resctrl_sched_in() to begin with "resctrl_arch_"
...
|
||
Paolo Bonzini
|
4e02d4f973 |
KVM SVM changes for 6.16:
- 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.
- 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.
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Merge tag 'kvm-x86-svm-6.16' of https://github.com/kvm-x86/linux into HEAD
KVM SVM changes for 6.16:
- 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.
- 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.
|
||
|
Paolo Bonzini
|
3e89d5fdc7 |
KVM VMX changes for 6.16:
- Explicitly check MSR load/store list counts to fix a potential overflow on
32-bit kernels.
- Flush shadow VMCSes on emergency reboot.
- Revert mem_enc_ioctl() back to an optional hook, as it's nullified when
SEV or TDX is disabled via Kconfig.
- Macrofy the handling of vt_x86_ops to eliminate a pile of boilerplate code
needed for TDX, and to optimize CONFIG_KVM_INTEL_TDX=n builds.
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Merge tag 'kvm-x86-vmx-6.16' of https://github.com/kvm-x86/linux into HEAD
KVM VMX changes for 6.16:
- Explicitly check MSR load/store list counts to fix a potential overflow on
32-bit kernels.
- Flush shadow VMCSes on emergency reboot.
- Revert mem_enc_ioctl() back to an optional hook, as it's nullified when
SEV or TDX is disabled via Kconfig.
- Macrofy the handling of vt_x86_ops to eliminate a pile of boilerplate code
needed for TDX, and to optimize CONFIG_KVM_INTEL_TDX=n builds.
|
||
|
Paolo Bonzini
|
3e0797f6dd |
KVM selftests changes for 6.16:
- Add support for SNP to the various SEV selftests. - Add a selftest to verify fastops instructions via forced emulation. - Add MGLRU support to the access tracking perf test. -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEKTobbabEP7vbhhN9OlYIJqCjN/0FAmgwmd0ACgkQOlYIJqCj N/3WCBAAsQ5zS8e+B1+7xopSz41eCou8L7KBDZZSe4B9TAuT+hMslXBEculyOJqh tIlBFlvrQA/hC2tNYla58jIeA6/f08Jq4/sV1URMNvORFKMcIvgnKpxmMJfKujve L2iHvJigJs4hoBCXYHCZHTkd5VAtB6j++7y9rqZS+RznM6z6/NI9SalX7pHr7Sri DQeaMc71UYJfllvLyLmI+MbQccdLfQ1v4dmkt6pz29K5s0pX9PQYp54+Hu1Z73Te aFdrG+CuDchra1jxLFoell5P9bD6nq9SsNBfdf+6VjYk/1MMHP4yX/dAFEtEqMbm RJNX95bewY4mms3fj6e9j8jVXDLBiXR2an8yJI8k6CP6VPsIXQn+RG2pUQMcOUj0 zcWikbfXvfn+ReIoaeReWPyZ7tPMW33mhnHDPy/saWHdZ9sycI4w2DstKgc2pe9E e6jI9H5JiH49CoMnue38kwnACNUIIvolJDpWeU6K0vQz4p5k6eUNTMSTEEVZbwiV Y8MVqMIf+Cu+y6UY1co5OhH387kFuLgYMC/LIFz/4nOrlopRCAzMvYcFEqo9gIOO 0+Ls/lkPc/hU5D2f3/20UjAGKVY/GfTwKJDRFptzaYMfmiMWW0pl2zlHagYp1huM 7k8p0vVh5rFOLUJxiftXC8+jBVyJKXLGgwPxBdLVapFMs9DU9gI= =v9bp -----END PGP SIGNATURE----- Merge tag 'kvm-x86-selftests-6.16' of https://github.com/kvm-x86/linux into HEAD KVM selftests changes for 6.16: - Add support for SNP to the various SEV selftests. - Add a selftest to verify fastops instructions via forced emulation. - Add MGLRU support to the access tracking perf test. |
||
|
Paolo Bonzini
|
db44dcbdf8 |
KVM x86 posted interrupt changes for 6.16:
Refine and optimize KVM's software processing of the PIR, and ultimately share PIR harvesting code between KVM and the kernel's Posted MSI handler -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEKTobbabEP7vbhhN9OlYIJqCjN/0FAmgwmWcACgkQOlYIJqCj N/3mUw/9HN4OLRqFytu+GjEocl8I7JelJdwCsNMsUwZRnNVnYGDqsjvw8rzqeFmx RoQ8uNqMd1PqZOgAdN6suLES949ItErbnG2+UlBvZeNgR63K8fyNJaPUzSXh0Kyd vNNzGschI0txZXNEtMHcIsCuQknU/arlE6v+HOAokb1jxaIZH2h06vrBAj6pLAHO hbcZPkaQEaFoQhqCbYm015ecJQRPv3IZoW7H1cK5nC4q6QdNo3LPfGqUJwgHV3Wq hbfS+2J78nTqLhSn7HHE/y5z3R5+ZyPwFQwbqfvjjap5/DW5w8Tltg2Oif597lf2 klBukBkJyfzSdhjaPKb3V23kCNabNyyX7KUDZnW5HCiEu62Lnl0MexXCvFvSvtmy YDSsXMg3KdtlESwUOaxGjd2J81tx36L3ZvWRaopDLzA2A6KVyVQCSANGOGkKrRzq Qq3R/frzp1uUVpVDtdyDIO1AujoXkRecdOj1uAIr2XQBg8jx0kveAUyrkXFbQVjK oNbfRlOiu6/vnXkWqwZ2w/Q0kRRrK7M+vensOZlculqDqxPH+BLWB+dfPqjGikb/ cL01KPu6n/GQJpwAxIbGU4eUIQPAVOcHm3iRaIlRqEoDCs7C8fTRIyDx+cD1vW8O O9j/r05EV/Ck5XF2ks6bHIK+C3wemNrCvoeFbnO1uicqtdO+Tqw= =dU1G -----END PGP SIGNATURE----- Merge tag 'kvm-x86-pir-6.16' of https://github.com/kvm-x86/linux into HEAD KVM x86 posted interrupt changes for 6.16: Refine and optimize KVM's software processing of the PIR, and ultimately share PIR harvesting code between KVM and the kernel's Posted MSI handler |
||
|
Paolo Bonzini
|
ebd38b26ec |
KVM x86 misc changes for 6.16:
- 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.
- Misc cleanups.
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Merge tag 'kvm-x86-misc-6.16' of https://github.com/kvm-x86/linux into HEAD
KVM x86 misc changes for 6.16:
- 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.
- Misc cleanups.
|
||
|
Linus Torvalds
|
24244df067 |
Two changes to simplify the x86 vDSO code a bit.
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||
|
Linus Torvalds
|
0aee061726 |
Move the x86 page fault tracepoints to generic code, because
other architectures would like to make use of them as well. Signed-off-by: Ingo Molnar <mingo@kernel.org> -----BEGIN PGP SIGNATURE----- iQJFBAABCgAvFiEEBpT5eoXrXCwVQwEKEnMQ0APhK1gFAmgy+RARHG1pbmdvQGtl cm5lbC5vcmcACgkQEnMQ0APhK1jTHA//eIBOFKJdxmhpJ95kzA0tRXue+FUSTAX+ j9rMZOJpR9hnVkr0pBxH8bU42lji4+6b2vujMHaT59n5i2kH5tPFHW1xfEnpbVNw thSRsFxrUKsNnKPBju0vK9WQs9e1cn2ZvVBbh2SHrATKQrcTCmJroEERZDX0cdnn VrPeGoc7UUAjxE23c3vnZOzAJDapIc9zPAdfVGRa7xHqlq5grryG+SfHFzT/fd08 5Qwu8TN37jo1HU5v2I4RYIh4Alc1lXtWTfJAc0bks0Cpryu+Et9+N2XANu/VatVw cve/Ubwdou9m0QxQtUTULttEbMSBB8Ylc7DJ1PdGkhULxNM8cCb+Yx9C8Gk0+8Rf SP8/ZSVK8EE+3ETP+J8r8VXoXrNgTPSjMeI1s4rZD/b9QpRKE4g/Khu+R9UA8JBV yuYdy2xkeRbfFVzoGDSVnZItk18MuAoq4hSNqgAxl9/S33HWG84KHQAnjzixCqb4 9Ai7n3/FBEe1edLJXKoqWK96mTa5P/vpGjMnL8wQ0rAnSYI+V2OSwPpZ9HHviw3g qYYMqsmiU6ChbfcUnuub/YwdJFdRieVSOa7wh3H6mfKAuakpS0At8fIyD5mBtFtA /qeSD9INII/guT1gdTgqGsirXeObbmNpC+HJjz8hRvsoP6hdoT2L/UZsUH89LcDl qd8MKeV1Kew= =xi0h -----END PGP SIGNATURE----- Merge tag 'x86-debug-2025-05-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 debug updates from Ingo Molnar: "Move the x86 page fault tracepoints to generic code, because other architectures would like to make use of them as well" * tag 'x86-debug-2025-05-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/tracing, x86/mm: Move page fault tracepoints to generic x86/tracing, x86/mm: Remove redundant trace_pagefault_key |
||
|
Linus Torvalds
|
785cdec46e |
Core x86 updates for v6.16:
Boot code changes:
- A large series of changes to reorganize the x86 boot code into a better isolated
and easier to maintain base of PIC early startup code in arch/x86/boot/startup/,
by Ard Biesheuvel.
Motivation & background:
| Since commit
|
|
|
||
|
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
...
|
||
|
Linus Torvalds
|
14418ddcc2 |
This update includes the following changes:
API: - Fix memcpy_sglist to handle partially overlapping SG lists. - Use memcpy_sglist to replace null skcipher. - Rename CRYPTO_TESTS to CRYPTO_BENCHMARK. - Flip CRYPTO_MANAGER_DISABLE_TEST into CRYPTO_SELFTESTS. - Hide CRYPTO_MANAGER. - Add delayed freeing of driver crypto_alg structures. Compression: - Allocate large buffers on first use instead of initialisation in scomp. - Drop destination linearisation buffer in scomp. - Move scomp stream allocation into acomp. - Add acomp scatter-gather walker. - Remove request chaining. - Add optional async request allocation. Hashing: - Remove request chaining. - Add optional async request allocation. - Move partial block handling into API. - Add ahash support to hmac. - Fix shash documentation to disallow usage in hard IRQs. Algorithms: - Remove unnecessary SIMD fallback code on x86 and arm/arm64. - Drop avx10_256 xts(aes)/ctr(aes) on x86. - Improve avx-512 optimisations for xts(aes). - Move chacha arch implementations into lib/crypto. - Move poly1305 into lib/crypto and drop unused Crypto API algorithm. - Disable powerpc/poly1305 as it has no SIMD fallback. - Move sha256 arch implementations into lib/crypto. - Convert deflate to acomp. - Set block size correctly in cbcmac. Drivers: - Do not use sg_dma_len before mapping in sun8i-ss. - Fix warm-reboot failure by making shutdown do more work in qat. - Add locking in zynqmp-sha. - Remove cavium/zip. - Add support for PCI device 0x17D8 to ccp. - Add qat_6xxx support in qat. - Add support for RK3576 in rockchip-rng. - Add support for i.MX8QM in caam. Others: - Fix irq_fpu_usable/kernel_fpu_begin inconsistency during CPU bring-up. - Add new SEV/SNP platform shutdown API in ccp. -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEn51F/lCuNhUwmDeSxycdCkmxi6cFAmgz47AACgkQxycdCkmx i6fvKRAAr4Xa903L0r1Q1P1alQqoFFCqimUWeH72m68LiWynHWi0lUo0z/+tKweg mnPStz7/Ha9HRHJjdNCMPnlJqXQDkuH3bIOuBJCwduDuhHo9VGOd46XGzmGMv3gb HKuZhI0lk7pznK3CSyD/2nHmbDCHD+7feTZSBMoN9mm875+aSoM6fdxgak8uPFcq KbB1L+hObTn2kAPSqRrNOR8/xG2N7hdH8eax7Li+LAtqYNVT5HvWVECsB/CKRPfB sgAv3UTzcIFapSSHUHaONppSeoqPAIAeV7SdQhJvlT+EUUR/h/B6+D9OUQQqbphQ LBalgTnqMKl0ymDEQFQ6QyYCat9ZfNmDft2WcXEsxc8PxImkgJI1W3B8O51sOjbG 78D8JqVQ96dleo4FsBhM2wfG0b41JM6zU4raC4vS7a3qsUS+Q1MpehvcS1iORicy SpGdE8e7DLlxKhzWyW1xJnbrtMZDC7Sa2hUnxrvP0/xOvRhChKscRVtWcf0a5q7X 8JmuvwVSOJuSbQ3MeFbQvpo5lR9+0WsNjM6e9miiH6Y7vZUKmWcq2yDp377qVzeh 7NK6+OwGIQZZExrmtPw2BXwssT9Eg+ks6Y7g2Ne7yzvrjVNfEPY7Cws/5w7p8mRS qhrcpbJNFlWgD7YYkmGZFTQ8DCN25ipP8lklO/hbcfchqLE/o1o= =O8L5 -----END PGP SIGNATURE----- Merge tag 'v6.16-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 Pull crypto updates from Herbert Xu: "API: - Fix memcpy_sglist to handle partially overlapping SG lists - Use memcpy_sglist to replace null skcipher - Rename CRYPTO_TESTS to CRYPTO_BENCHMARK - Flip CRYPTO_MANAGER_DISABLE_TEST into CRYPTO_SELFTESTS - Hide CRYPTO_MANAGER - Add delayed freeing of driver crypto_alg structures Compression: - Allocate large buffers on first use instead of initialisation in scomp - Drop destination linearisation buffer in scomp - Move scomp stream allocation into acomp - Add acomp scatter-gather walker - Remove request chaining - Add optional async request allocation Hashing: - Remove request chaining - Add optional async request allocation - Move partial block handling into API - Add ahash support to hmac - Fix shash documentation to disallow usage in hard IRQs Algorithms: - Remove unnecessary SIMD fallback code on x86 and arm/arm64 - Drop avx10_256 xts(aes)/ctr(aes) on x86 - Improve avx-512 optimisations for xts(aes) - Move chacha arch implementations into lib/crypto - Move poly1305 into lib/crypto and drop unused Crypto API algorithm - Disable powerpc/poly1305 as it has no SIMD fallback - Move sha256 arch implementations into lib/crypto - Convert deflate to acomp - Set block size correctly in cbcmac Drivers: - Do not use sg_dma_len before mapping in sun8i-ss - Fix warm-reboot failure by making shutdown do more work in qat - Add locking in zynqmp-sha - Remove cavium/zip - Add support for PCI device 0x17D8 to ccp - Add qat_6xxx support in qat - Add support for RK3576 in rockchip-rng - Add support for i.MX8QM in caam Others: - Fix irq_fpu_usable/kernel_fpu_begin inconsistency during CPU bring-up - Add new SEV/SNP platform shutdown API in ccp" * tag 'v6.16-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (382 commits) x86/fpu: Fix irq_fpu_usable() to return false during CPU onlining crypto: qat - add missing header inclusion crypto: api - Redo lookup on EEXIST Revert "crypto: testmgr - Add hash export format testing" crypto: marvell/cesa - Do not chain submitted requests crypto: powerpc/poly1305 - add depends on BROKEN for now Revert "crypto: powerpc/poly1305 - Add SIMD fallback" crypto: ccp - Add missing tee info reg for teev2 crypto: ccp - Add missing bootloader info reg for pspv5 crypto: sun8i-ce - move fallback ahash_request to the end of the struct crypto: octeontx2 - Use dynamic allocated memory region for lmtst crypto: octeontx2 - Initialize cptlfs device info once crypto: xts - Only add ecb if it is not already there crypto: lrw - Only add ecb if it is not already there crypto: testmgr - Add hash export format testing crypto: testmgr - Use ahash for generic tfm crypto: hmac - Add ahash support crypto: testmgr - Ignore EEXIST on shash allocation crypto: algapi - Add driver template support to crypto_inst_setname crypto: shash - Set reqsize in shash_alg ... |
||
|
Paolo Bonzini
|
85502b2214 |
LoongArch KVM changes for v6.16
1. Don't flush tlb if HW PTW supported. 2. Add LoongArch KVM selftests support. -----BEGIN PGP SIGNATURE----- iQJKBAABCAA0FiEEzOlt8mkP+tbeiYy5AoYrw/LiJnoFAmgsdO8WHGNoZW5odWFj YWlAa2VybmVsLm9yZwAKCRAChivD8uImejUWD/9zNaBSqTpqeAptRQ6qTKdrxYtN ZKJR9a8AQF5vMPD9dWoRr6iLaNt061GqBOKbhF5RGUVq6uIDfCkZbSbX1h6Ptgcz OwkJHbrZAu+Z31NSoYqbgPZnurSJ9oOUGsghqp3ecKEf0LptTVaKw4WDeKkKNOlq eJaUC1WJ1P4sSXhTlHKAl79Ds/1pza9iAgtKXothrh09PL48LYaWFpmiS0uQmKOD qwYVU/OJIUWn4ZOxyGdk6ZR0B+mJOwwoO1ILptRIeSk4oTKiE1HiIEqnhdnMrJFr DkRdwQ/jq7iH/CFkVybNzxgLqAqpGLJgPj5VakYPmp2scuWSESej9/o8wYrmn0y0 QuDQah0LiRIcbUYRHLDkfKRKCndfJ5KCrpOiD5mZ8bMd2LF9hPnH5toCXb/ZEpsK plu9qUrQgXF8rkX/zCIvQrOp0kYdU8DMbhZsXymSVpEs1fwrCNp2/Z2PrMYLKGt+ JT+65jVRJ67d1OdKw3DrWQA8Au0Ma1rgzX3oLDu8wnqAG7ULAJRVIkDMcxG7a5SQ P+DlIbEHC1U8Dw8hW+PFhfOl13M9p5s3EP5fy8q85UJ/5fJ41fCPBUOm/rfMQcci 6/e+xwBKKkJ7oQ/fFKvJ+n6GbV6suV5FUxicYQjC43iiCKklRhG77uek/DK3c5um ZiTu+YapX9qbG54Q9w== =YM/u -----END PGP SIGNATURE----- Merge tag 'loongarch-kvm-6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson into HEAD LoongArch KVM changes for v6.16 1. Don't flush tlb if HW PTW supported. 2. Add LoongArch KVM selftests support. |
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Eric Biggers
|
2297554f01 |
x86/fpu: Fix irq_fpu_usable() to return false during CPU onlining
irq_fpu_usable() incorrectly returned true before the FPU is
initialized. The x86 CPU onlining code can call sha256() to checksum
AMD microcode images, before the FPU is initialized. Since sha256()
recently gained a kernel-mode FPU optimized code path, a crash occurred
in kernel_fpu_begin_mask() during hotplug CPU onlining.
(The crash did not occur during boot-time CPU onlining, since the
optimized sha256() code is not enabled until subsys_initcalls run.)
Fix this by making irq_fpu_usable() return false before fpu__init_cpu()
has run. To do this without adding any additional overhead to
irq_fpu_usable(), replace the existing per-CPU bool in_kernel_fpu with
kernel_fpu_allowed which tracks both initialization and usage rather
than just usage. The initial state is false; FPU initialization sets it
to true; kernel-mode FPU sections toggle it to false and then back to
true; and CPU offlining restores it to the initial state of false.
Fixes:
|
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Roman Kisel
|
43cb39ad26 |
arch/x86: Provide the CPU number in the wakeup AP callback
When starting APs, confidential guests and paravisor guests need to know the CPU number, and the pattern of using the linear search has emerged in several places. With N processors that leads to the O(N^2) time complexity. Provide the CPU number in the AP wake up callback so that one can get the CPU number in constant time. Suggested-by: Michael Kelley <mhklinux@outlook.com> Signed-off-by: Roman Kisel <romank@linux.microsoft.com> Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Michael Kelley <mhklinux@outlook.com> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Link: https://lore.kernel.org/r/20250507182227.7421-3-romank@linux.microsoft.com Signed-off-by: Wei Liu <wei.liu@kernel.org> Message-ID: <20250507182227.7421-3-romank@linux.microsoft.com> |
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Roman Kisel
|
86c48271e0 |
x86/hyperv: Fix APIC ID and VP index confusion in hv_snp_boot_ap()
To start an application processor in SNP-isolated guest, a hypercall
is used that takes a virtual processor index. The hv_snp_boot_ap()
function uses that START_VP hypercall but passes as VP index to it
what it receives as a wakeup_secondary_cpu_64 callback: the APIC ID.
As those two aren't generally interchangeable, that may lead to hung
APs if the VP index and the APIC ID don't match up.
Update the parameter names to avoid confusion as to what the parameter
is. Use the APIC ID to the VP index conversion to provide the correct
input to the hypercall.
Cc: stable@vger.kernel.org
Fixes:
|
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Coiby Xu
|
e1e6cd01d9 |
Revert "x86/mm: Remove unused __set_memory_prot()"
This reverts commit
|
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Ingo Molnar
|
412751aa69 |
Linux 6.15-rc7
-----BEGIN PGP SIGNATURE----- iQFSBAABCgA8FiEEq68RxlopcLEwq+PEeb4+QwBBGIYFAmgqSbkeHHRvcnZhbGRz QGxpbnV4LWZvdW5kYXRpb24ub3JnAAoJEHm+PkMAQRiGr6sH/1ICAvlin1GuxffE ISVNz3xhXQpXG2k8yl9r0umpdCfPQbGrxm30vZyuIDNutY/FuMvkIqfu+Z1NnLg0 GidZW015LtXrp7/puKtTnUD5CPSjdETMXig+Q7c1PrxkkmHwz8sBbbm173AIDbDB t7wwqSEUQh2AIDouGwN+DXB+6bR2FoOXb/k/njmtappIwR3rBc2f1HQJnP095rKO 5AKw1c9DMv5Wq2cEdBOCP48e4CFZEIN1ycW0nvtjpnOmcPOJjLoEothRbntQolqF udtj5UeTGdAJqmjigv7KHmlrmFNe+GqBq4+beHl5MRxhBaT2uGGaM9jCJiSxT3Jx sHyYYr8= =Ddma -----END PGP SIGNATURE----- Merge tag 'v6.15-rc7' into x86/core, to pick up fixes Pick up build fixes from upstream to make this tree more testable. Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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Linus Torvalds
|
56b2b1fc90 |
Misc x86 fixes:
- Fix SEV-SNP kdump bugs - Update the email address of Alexey Makhalov in MAINTAINERS - Add the CPU feature flag for the Zen6 microarchitecture - Fix typo in system message Signed-off-by: Ingo Molnar <mingo@kernel.org> -----BEGIN PGP SIGNATURE----- iQJFBAABCgAvFiEEBpT5eoXrXCwVQwEKEnMQ0APhK1gFAmgoj3MRHG1pbmdvQGtl cm5lbC5vcmcACgkQEnMQ0APhK1hppg//S/eodSXrgxzTOvZLu0gFeYN4xyxUnfWl 0Dvc+FRasGCpBpQcD9sl3w9xKnTkaGY250NPP4/OKW2JgiizP6E3UcFYvaDnZ96I TU3/y3acAI5zpvASOuOuDlwDt0w9xIk5L/K0gcVec9dYnGdAOmTE4jjZV6wDm0Q4 rto8k5E0RmSs5HQ4GcpU2sgzJSlaQlkkxZMo6HaUE6oJUiuodmPnxHkjoLgAQiU9 I0ALcrPVtyI1jap52DVxAIDcMsrOddazYley4IyDRqWezwrtrxkNaEzvNkMWO4ZV iAnTYe/21HrppsQ40KuYa5VY5k0Dkv+QVzb23rGT2sZlPaXAiPIVUtt25z4VGtve 1z/kn1TszfcqC9sPodVcHQkzNrTktlaEKXd3u9GuFlfMkuj7iSnmYnGoPMo6x7T9 vcbBF6PUQ+uNi7QZXDvww8S0OMBVVlMDOjhuGjFBFzkmfVzkFtdyC1oGXppiXNzg KG0LjiTDlOeI4B8bxG1Wwldwl7vLfwHJag2xWaw0uQR8mjstkCTLXibjdvz3QNwi bM14hlG3TxmxJSsYl8QNFnF45DwzApWGKz9K81OPz/yZ2Z6KB1uQqrN2l8+blFt9 OUMEukY9sAcmUR1hkt3Rdynb1ri+jGMcJUGOn48w2ne+qiLoVicp8LEgWO6KoI3Z vgLnVmqIa9o= =cD7r -----END PGP SIGNATURE----- Merge tag 'x86-urgent-2025-05-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull misc x86 fixes from Ingo Molnar: - Fix SEV-SNP kdump bugs - Update the email address of Alexey Makhalov in MAINTAINERS - Add the CPU feature flag for the Zen6 microarchitecture - Fix typo in system message * tag 'x86-urgent-2025-05-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/mm: Remove duplicated word in warning message x86/CPU/AMD: Add X86_FEATURE_ZEN6 x86/sev: Make sure pages are not skipped during kdump x86/sev: Do not touch VMSA pages during SNP guest memory kdump MAINTAINERS: Update Alexey Makhalov's email address x86/sev: Fix operator precedence in GHCB_MSR_VMPL_REQ_LEVEL macro |
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Kirill A. Shutemov
|
09230b7554 |
x86/paravirt: Restrict PARAVIRT_XXL to 64-bit only
PARAVIRT_XXL is exclusively utilized by XEN_PV, which is only compatible with 64-bit machines. Clearly designate PARAVIRT_XXL as 64-bit only and remove ifdefs to support CONFIG_PGTABLE_LEVELS < 5. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Reviewed-by: Juergen Gross <jgross@suse.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: https://lore.kernel.org/r/20250516123306.3812286-5-kirill.shutemov@linux.intel.com |
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Kirill A. Shutemov
|
7212b58d6d |
x86/mm/64: Make 5-level paging support unconditional
Both Intel and AMD CPUs support 5-level paging, which is expected to become more widely adopted in the future. All major x86 Linux distributions have the feature enabled. Remove CONFIG_X86_5LEVEL and related #ifdeffery for it to make it more readable. Suggested-by: Borislav Petkov <bp@alien8.de> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Reviewed-by: Ard Biesheuvel <ardb@kernel.org> Reviewed-by: Borislav Petkov (AMD) <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: https://lore.kernel.org/r/20250516123306.3812286-4-kirill.shutemov@linux.intel.com |
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|
Kirill A. Shutemov
|
1bffe6f689 |
x86/mm/64: Always use dynamic memory layout
Dynamic memory layout is used by KASLR and 5-level paging. CONFIG_X86_5LEVEL is going to be removed, making 5-level paging support unconditional which requires unconditional support of dynamic memory layout. Remove CONFIG_DYNAMIC_MEMORY_LAYOUT. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Reviewed-by: Ard Biesheuvel <ardb@kernel.org> Reviewed-by: Borislav Petkov (AMD) <bp@alien8.de> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Kieran Bingham <kbingham@kernel.org> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: https://lore.kernel.org/r/20250516123306.3812286-2-kirill.shutemov@linux.intel.com |
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Nikunj A Dadhania
|
827547bc3a |
KVM: SVM: Add architectural definitions/assets for Bus Lock Threshold
Virtual machines can exploit bus locks to degrade the performance of the system. Bus locks can be caused by Non-WB(Write back) and misaligned locked RMW (Read-modify-Write) instructions and require systemwide synchronization among all processors which can result into significant performance penalties. To address this issue, the Bus Lock Threshold feature is introduced to provide ability to hypervisor to restrict guests' capability of initiating mulitple buslocks, thereby preventing system slowdowns. Support for the buslock threshold is indicated via CPUID function 0x8000000A_EDX[29]. On the processors that support the Bus Lock Threshold feature, the VMCB provides a Bus Lock Threshold enable bit and an unsigned 16-bit Bus Lock threshold count. VMCB intercept bit VMCB Offset Bits Function 14h 5 Intercept bus lock operations Bus lock threshold count VMCB Offset Bits Function 120h 15:0 Bus lock counter When a VMRUN instruction is executed, the bus lock threshold count is loaded into an internal count register. Before the processor executes a bus lock in the guest, it checks the value of this register: - If the value is greater than '0', the processor successfully executes the bus lock and decrements the count. - If the value is '0', the bus lock is not executed, and a #VMEXIT to the VMM is taken. The bus lock threshold #VMEXIT is reported to the VMM with the VMEXIT code A5h, SVM_EXIT_BUS_LOCK. Signed-off-by: Nikunj A Dadhania <nikunj@amd.com> Co-developed-by: Manali Shukla <manali.shukla@amd.com> Signed-off-by: Manali Shukla <manali.shukla@amd.com> Link: https://lore.kernel.org/r/20250502050346.14274-4-manali.shukla@amd.com [sean: rewrite shortlog] Signed-off-by: Sean Christopherson <seanjc@google.com> |
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Manali Shukla
|
faad6645e1 |
x86/cpufeatures: Add CPUID feature bit for the Bus Lock Threshold
Misbehaving guests can cause bus locks to degrade the performance of the system. The Bus Lock Threshold feature can be used to address this issue by providing capability to the hypervisor to limit guest's ability to generate bus lock, thereby preventing system slowdown due to performance penalities. When the Bus Lock Threshold feature is enabled, the processor checks the bus lock threshold count before executing the buslock and decides whether to trigger bus lock exit or not. The value of the bus lock threshold count '0' generates bus lock exits, and if the value is greater than '0', the bus lock is executed successfully and the bus lock threshold count is decremented. Presence of the Bus Lock threshold feature is indicated via CPUID function 0x8000000A_EDX[29]. Signed-off-by: Manali Shukla <manali.shukla@amd.com> Reviewed-by: Borislav Petkov (AMD) <bp@alien8.de> Link: https://lore.kernel.org/r/20250502050346.14274-3-manali.shukla@amd.com Signed-off-by: Sean Christopherson <seanjc@google.com> |
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|
Manali Shukla
|
e9628b011b |
KVM: x86: Make kvm_pio_request.linear_rip a common field for user exits
Move and rename kvm_pio_request.linear_rip to kvm_vcpu_arch.cui_linear_rip so that the field can be used by other userspace exit completion flows that need to take action if and only if userspace has not modified RIP. No functional changes intended. Suggested-by: Sean Christopherson <seanjc@google.com> Signed-off-by: Manali Shukla <manali.shukla@amd.com> Link: https://lore.kernel.org/r/20250502050346.14274-2-manali.shukla@amd.com Signed-off-by: Sean Christopherson <seanjc@google.com> |
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James Morse
|
279f225951 |
x86/resctrl: Move pseudo lock prototypes to include/linux/resctrl.h
The resctrl pseudo-lock feature allows an architecture to allocate data into particular cache portions, which are then treated as reserved to avoid that data ever being evicted. Setting this up is deeply architecture specific as it involves disabling prefetchers etc. It is not possible to support this kind of feature on arm64. Risc-V is assumed to be the same. The prototypes for the architecture code were added to x86's asm/resctrl.h, with other architectures able to provide stubs for their architecture. This forces other architectures to provide identical stubs. Move the prototypes and stubs to linux/resctrl.h, and switch between them using the existing Kconfig symbol. Signed-off-by: James Morse <james.morse@arm.com> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Reviewed-by: Reinette Chatre <reinette.chatre@intel.com> Reviewed-by: Fenghua Yu <fenghuay@nvidia.com> Tested-by: Fenghua Yu <fenghuay@nvidia.com> Tested-by: Babu Moger <babu.moger@amd.com> Tested-by: Shaopeng Tan <tan.shaopeng@jp.fujitsu.com> Tested-by: Tony Luck <tony.luck@intel.com> Link: https://lore.kernel.org/20250515165855.31452-20-james.morse@arm.com |
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|
James Morse
|
272ed1c28c |
x86/resctrl: Fix types in resctrl_arch_mon_ctx_{alloc,free}() stubs
resctrl_arch_mon_ctx_alloc() and resctrl_arch_mon_ctx_free() take an enum resctrl_event_id that is already defined in resctrl_types.h to be accessible to asm/resctrl.h. The x86 stubs take an int. Fix that. Signed-off-by: James Morse <james.morse@arm.com> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Reviewed-by: Reinette Chatre <reinette.chatre@intel.com> Reviewed-by: Fenghua Yu <fenghuay@nvidia.com> Tested-by: Fenghua Yu <fenghuay@nvidia.com> Tested-by: Babu Moger <babu.moger@amd.com> Tested-by: Shaopeng Tan <tan.shaopeng@jp.fujitsu.com> Tested-by: Tony Luck <tony.luck@intel.com> Link: https://lore.kernel.org/20250515165855.31452-19-james.morse@arm.com |
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Ahmed S. Darwish
|
3bf8ce8284 |
x86/cpuid: Rename hypervisor_cpuid_base()/for_each_possible_hypervisor_cpuid_base() to cpuid_base_hypervisor()/for_each_possible_cpuid_base_hypervisor()
In order to let all the APIs under <cpuid/api.h> have a shared "cpuid_"
namespace, rename hypervisor_cpuid_base() to cpuid_base_hypervisor().
To align with the new style, also rename:
for_each_possible_hypervisor_cpuid_base(function)
to:
for_each_possible_cpuid_base_hypervisor(function)
Adjust call-sites accordingly.
Suggested-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Ahmed S. Darwish <darwi@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: John Ogness <john.ogness@linutronix.de>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>
Cc: x86-cpuid@lists.linux.dev
Link: https://lore.kernel.org/r/aCZOi0Oohc7DpgTo@lx-t490
|
||
|
Ahmed S. Darwish
|
e7df7289f1 |
x86/cpuid: Rename cpuid_get_leaf_0x2_regs() to cpuid_leaf_0x2()
Rename the CPUID(0x2) register accessor function:
cpuid_get_leaf_0x2_regs(regs)
to:
cpuid_leaf_0x2(regs)
for consistency with other <cpuid/api.h> accessors that return full CPUID
registers outputs like:
cpuid_leaf(regs)
cpuid_subleaf(regs)
In the same vein, rename the CPUID(0x2) iteration macro:
for_each_leaf_0x2_entry()
to:
for_each_cpuid_0x2_desc()
to include "cpuid" in the macro name, and since what is iterated upon is
CPUID(0x2) cache and TLB "descriptos", not "entries". Prefix an
underscore to that iterator macro parameters, so that the newly renamed
'desc' parameter do not get mixed with "union leaf_0x2_regs :: desc[]" in
the macro's implementation.
Adjust all the affected call-sites accordingly.
While at it, use "CPUID(0x2)" instead of "CPUID leaf 0x2" as this is the
recommended style.
No change in functionality intended.
Signed-off-by: Ahmed S. Darwish <darwi@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>
Cc: John Ogness <john.ogness@linutronix.de>
Cc: x86-cpuid@lists.linux.dev
Link: https://lore.kernel.org/r/20250508150240.172915-6-darwi@linutronix.de
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Nam Cao
|
06aa9378df |
x86/tracing, x86/mm: Move page fault tracepoints to generic
Page fault tracepoints are interesting for other architectures as well. Move them to be generic. Signed-off-by: Nam Cao <namcao@linutronix.de> Signed-off-by: Ingo Molnar <mingo@kernel.org> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Gabriele Monaco <gmonaco@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: John Ogness <john.ogness@linutronix.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: linux-trace-kernel@vger.kernel.org Link: https://lore.kernel.org/r/89c2f284adf9b4c933f0e65811c50cef900a5a95.1747046848.git.namcao@linutronix.de |
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Nam Cao
|
d49ae4172c |
x86/tracing, x86/mm: Remove redundant trace_pagefault_key
trace_pagefault_key is used to optimize the pagefault tracepoints when it is disabled. However, tracepoints already have built-in static_key for this exact purpose. Remove this redundant key. Signed-off-by: Nam Cao <namcao@linutronix.de> Signed-off-by: Ingo Molnar <mingo@kernel.org> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Gabriele Monaco <gmonaco@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: John Ogness <john.ogness@linutronix.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: linux-trace-kernel@vger.kernel.org Link: https://lore.kernel.org/r/827c7666d2989f08742a4fb869b1ed5bfaaf1dbf.1747046848.git.namcao@linutronix.de |
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|
James Morse
|
7704fb81bc |
x86/resctrl: Rename resctrl_sched_in() to begin with "resctrl_arch_"
resctrl_sched_in() loads the architecture specific CPU MSRs with the CLOSID and RMID values. This function was named before resctrl was split to have architecture specific code, and generic filesystem code. This function is obviously architecture specific, but does not begin with 'resctrl_arch_', making it the odd one out in the functions an architecture needs to support to enable resctrl. Rename it for consistency. This is purely cosmetic. Signed-off-by: James Morse <james.morse@arm.com> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Reviewed-by: Shaopeng Tan <tan.shaopeng@jp.fujitsu.com> Reviewed-by: Tony Luck <tony.luck@intel.com> Reviewed-by: Reinette Chatre <reinette.chatre@intel.com> Reviewed-by: Fenghua Yu <fenghuay@nvidia.com> Tested-by: Fenghua Yu <fenghuay@nvidia.com> Tested-by: Carl Worth <carl@os.amperecomputing.com> # arm64 Tested-by: Shaopeng Tan <tan.shaopeng@jp.fujitsu.com> Tested-by: Peter Newman <peternewman@google.com> Tested-by: Amit Singh Tomar <amitsinght@marvell.com> # arm64 Tested-by: Shanker Donthineni <sdonthineni@nvidia.com> # arm64 Tested-by: Babu Moger <babu.moger@amd.com> Tested-by: Tony Luck <tony.luck@intel.com> Link: https://lore.kernel.org/20250515165855.31452-7-james.morse@arm.com |
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|
Ahmed S. Darwish
|
2f924ca36d |
x86/cpuid: Rename have_cpuid_p() to cpuid_feature()
In order to let all the APIs under <cpuid/api.h> have a shared "cpuid_" namespace, rename have_cpuid_p() to cpuid_feature(). Adjust all call-sites accordingly. Suggested-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Ahmed S. Darwish <darwi@linutronix.de> Signed-off-by: Ingo Molnar <mingo@kernel.org> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Andrew Cooper <andrew.cooper3@citrix.com> Cc: John Ogness <john.ogness@linutronix.de> Cc: x86-cpuid@lists.linux.dev Link: https://lore.kernel.org/r/20250508150240.172915-4-darwi@linutronix.de |
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|
Ahmed S. Darwish
|
968e300068 |
x86/cpuid: Set <asm/cpuid/api.h> as the main CPUID header
The main CPUID header <asm/cpuid.h> was originally a storefront for the
headers:
<asm/cpuid/api.h>
<asm/cpuid/leaf_0x2_api.h>
Now that the latter CPUID(0x2) header has been merged into the former,
there is no practical difference between <asm/cpuid.h> and
<asm/cpuid/api.h>.
Migrate all users to the <asm/cpuid/api.h> header, in preparation of
the removal of <asm/cpuid.h>.
Don't remove <asm/cpuid.h> just yet, in case some new code in -next
started using it.
Suggested-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Ahmed S. Darwish <darwi@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: John Ogness <john.ogness@linutronix.de>
Cc: x86-cpuid@lists.linux.dev
Link: https://lore.kernel.org/r/20250508150240.172915-3-darwi@linutronix.de
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||
|
Ahmed S. Darwish
|
cdc8be31cb |
x86/cpuid: Move CPUID(0x2) APIs into <cpuid/api.h>
Move all of the CPUID(0x2) APIs at <cpuid/leaf_0x2_api.h> into <cpuid/api.h>, in order centralize all CPUID APIs into the latter. While at it, separate the different CPUID leaf parsing APIs using header comments like "CPUID(0xN) parsing: ". Suggested-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Ahmed S. Darwish <darwi@linutronix.de> Signed-off-by: Ingo Molnar <mingo@kernel.org> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Andrew Cooper <andrew.cooper3@citrix.com> Cc: John Ogness <john.ogness@linutronix.de> Cc: x86-cpuid@lists.linux.dev Link: https://lore.kernel.org/r/20250508150240.172915-2-darwi@linutronix.de |
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|
Ingo Molnar
|
baad9190e6 |
x86/msr: Add rdmsrl_on_cpu() compatibility wrapper
Add a simple rdmsrl_on_cpu() compatibility wrapper for rdmsrq_on_cpu(), to make life in -next easier, where the PM tree recently grew more uses of the old API. Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Ingo Molnar <mingo@kernel.org> Acked-by: Mario Limonciello <mario.limonciello@amd.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Juergen Gross <jgross@suse.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Xin Li <xin@zytor.com> Link: https://lore.kernel.org/r/20250512145517.6e0666e3@canb.auug.org.au |
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Yazen Ghannam
|
24ee8d9432 |
x86/CPU/AMD: Add X86_FEATURE_ZEN6
Add a synthetic feature flag for Zen6.
[ bp: Move the feature flag to a free slot and avoid future merge
conflicts from incoming stuff. ]
Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/20250513204857.3376577-1-yazen.ghannam@amd.com
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|
Ingo Molnar
|
c4070e1996 |
Merge commit 'its-for-linus-20250509-merge' into x86/core, to resolve conflicts
Conflicts: Documentation/admin-guide/hw-vuln/index.rst arch/x86/include/asm/cpufeatures.h arch/x86/kernel/alternative.c arch/x86/kernel/cpu/bugs.c arch/x86/kernel/cpu/common.c drivers/base/cpu.c include/linux/cpu.h Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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Ingo Molnar
|
7d40efd67d |
Merge branch 'x86/platform' into x86/core, to merge dependent commits
Prepare to resolve conflicts with an upstream series of fixes that conflict
with pending x86 changes:
|
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|
Ingo Molnar
|
d6680b0077 |
Merge branch 'x86/nmi' into x86/core, to merge dependent commits
Prepare to resolve conflicts with an upstream series of fixes that conflict
with pending x86 changes:
|
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|
Ingo Molnar
|
1f82e8e1ca |
Merge branch 'x86/msr' into x86/core, to resolve conflicts
Conflicts: arch/x86/boot/startup/sme.c arch/x86/coco/sev/core.c arch/x86/kernel/fpu/core.c arch/x86/kernel/fpu/xstate.c Semantic conflict: arch/x86/include/asm/sev-internal.h Signed-off-by: Ingo Molnar <mingo@kernel.org> |