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KVM SVM changes for 6.17
Drop KVM's rejection of SNP's SMT and single-socket policy restrictions, and
instead rely on firmware to verify that the policy can actually be supported.
Don't bother checking that requested policy(s) can actually be satisfied, as
an incompatible policy doesn't put the kernel at risk in any way, and providing
guarantees with respect to the physical topology is outside of KVM's purview.
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KVM selftests changes for 6.17
- Fix a comment typo.
- Verify KVM is loaded when getting any KVM module param so that attempting to
run a selftest without kvm.ko loaded results in a SKIP message about KVM not
being loaded/enabled, versus some random parameter not existing.
- SKIP tests that hit EACCES when attempting to access a file, with a "Root
required?" help message. In most cases, the test just needs to be run with
elevated permissions.
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KVM local APIC changes for 6.17
Extract many of KVM's helpers for accessing architectural local APIC state
to common x86 so that they can be shared by guest-side code for Secure AVIC.
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KVM x86 MMU changes for 6.17
- Exempt nested EPT from the the !USER + CR0.WP logic, as EPT doesn't interact
with CR0.WP.
- Move the TDX hardware setup code to tdx.c to better co-locate TDX code
and eliminate a few global symbols.
- Dynamically allocation the shadow MMU's hashed page list, and defer
allocating the hashed list until it's actually needed (the TDP MMU doesn't
use the list).
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KVM x86 misc changes for 6.17
- Prevert the host's DEBUGCTL.FREEZE_IN_SMM (Intel only) when running the
guest. Failure to honor FREEZE_IN_SMM can bleed host state into the guest.
- Explicitly check vmcs12.GUEST_DEBUGCTL on nested VM-Enter (Intel only) to
prevent L1 from running L2 with features that KVM doesn't support, e.g. BTF.
- Intercept SPEC_CTRL on AMD if the MSR shouldn't exist according to the
vCPU's CPUID model.
- Rework the MSR interception code so that the SVM and VMX APIs are more or
less identical.
- Recalculate all MSR intercepts from the "source" on MSR filter changes, and
drop the dedicated "shadow" bitmaps (and their awful "max" size defines).
- WARN and reject loading kvm-amd.ko instead of panicking the kernel if the
nested SVM MSRPM offsets tracker can't handle an MSR.
- Advertise support for LKGS (Load Kernel GS base), a new instruction that's
loosely related to FRED, but is supported and enumerated independently.
- Fix a user-triggerable WARN that syzkaller found by stuffing INIT_RECEIVED,
a.k.a. WFS, and then putting the vCPU into VMX Root Mode (post-VMXON). Use
the same approach KVM uses for dealing with "impossible" emulation when
running a !URG guest, and simply wait until KVM_RUN to detect that the vCPU
has architecturally impossible state.
- Add KVM_X86_DISABLE_EXITS_APERFMPERF to allow disabling interception of
APERF/MPERF reads, so that a "properly" configured VM can "virtualize"
APERF/MPERF (with many caveats).
- Reject KVM_SET_TSC_KHZ if vCPUs have been created, as changing the "default"
frequency is unsupported for VMs with a "secure" TSC, and there's no known
use case for changing the default frequency for other VM types.
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into HEAD
KVM VFIO device assignment cleanups for 6.17
Kill off kvm_arch_{start,end}_assignment() and x86's associated tracking now
that KVM no longer uses assigned_device_count as a bad heuristic for "VM has
an irqbypass producer" or for "VM has access to host MMIO".
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HEAD
KVM Dirty Ring changes for 6.17
Fix issues with dirty ring harvesting where KVM doesn't bound the processing
of entries in any way, which allows userspace to keep KVM in a tight loop
indefinitely. Clean up code and comments along the way.
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KVM generic changes for 6.17
- Add a tracepoint for KVM_SET_MEMORY_ATTRIBUTES to help debug issues related
to private <=> shared memory conversions.
- Drop guest_memfd's .getattr() implementation as the VFS layer will call
generic_fillattr() if inode_operations.getattr is NULL.
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KVM MMIO Stale Data mitigation cleanup for 6.17
Rework KVM's mitigation for the MMIO State Data vulnerability to track
whether or not a vCPU has access to (host) MMIO based on the MMU that will be
used when running in the guest. The current approach doesn't actually detect
whether or not a guest has access to MMIO, and is prone to false negatives (and
to a lesser extent, false positives), as KVM_DEV_VFIO_FILE_ADD is optional, and
obviously only covers VFIO devices.
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KVM IRQ changes for 6.17
- Rework irqbypass to track/match producers and consumers via an xarray
instead of a linked list. Using a linked list leads to O(n^2) insertion
times, which is hugely problematic for use cases that create large numbers
of VMs. Such use cases typically don't actually use irqbypass, but
eliminating the pointless registration is a future problem to solve as it
likely requires new uAPI.
- Track irqbypass's "token" as "struct eventfd_ctx *" instead of a "void *",
to avoid making a simple concept unnecessarily difficult to understand.
- Add CONFIG_KVM_IOAPIC for x86 to allow disabling support for I/O APIC, PIC,
and PIT emulation at compile time.
- Drop x86's irq_comm.c, and move a pile of IRQ related code into irq.c.
- Fix a variety of flaws and bugs in the AVIC device posted IRQ code.
- Inhibited AVIC if a vCPU's ID is too big (relative to what hardware
supports) instead of rejecting vCPU creation.
- Extend enable_ipiv module param support to SVM, by simply leaving IsRunning
clear in the vCPU's physical ID table entry.
- Disable IPI virtualization, via enable_ipiv, if the CPU is affected by
erratum #1235, to allow (safely) enabling AVIC on such CPUs.
- Dedup x86's device posted IRQ code, as the vast majority of functionality
can be shared verbatime between SVM and VMX.
- Harden the device posted IRQ code against bugs and runtime errors.
- Use vcpu_idx, not vcpu_id, for GA log tag/metadata, to make lookups O(1)
instead of O(n).
- Generate GA Log interrupts if and only if the target vCPU is blocking, i.e.
only if KVM needs a notification in order to wake the vCPU.
- Decouple device posted IRQs from VFIO device assignment, as binding a VM to
a VFIO group is not a requirement for enabling device posted IRQs.
- Clean up and document/comment the irqfd assignment code.
- Disallow binding multiple irqfds to an eventfd with a priority waiter, i.e.
ensure an eventfd is bound to at most one irqfd through the entire host,
and add a selftest to verify eventfd:irqfd bindings are globally unique.
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KVM/riscv changes for 6.17
- Enabled ring-based dirty memory tracking
- Improved perf kvm stat to report interrupt events
- Delegate illegal instruction trap to VS-mode
- MMU related improvements for KVM RISC-V for upcoming
nested virtualization
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The caller has already passed in the memslot, and there are
two instances `{kvm_faultin_pfn/mark_page_dirty}` of retrieving
the memslot again in `kvm_riscv_gstage_map`, we can replace them
with `{__kvm_faultin_pfn/mark_page_dirty_in_slot}`.
Signed-off-by: Quan Zhou <zhouquan@iscas.ac.cn>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/50989f0a02790f9d7dc804c2ade6387c4e7fbdbc.1749634392.git.zhouquan@iscas.ac.cn
Signed-off-by: Anup Patel <anup@brainfault.org>
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There is already a helper function find_vma_intersection() in KVM
for searching intersecting VMAs, use it directly.
Signed-off-by: Quan Zhou <zhouquan@iscas.ac.cn>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/230d6c8c8b8dd83081fcfd8d83a4d17c8245fa2f.1731552790.git.zhouquan@iscas.ac.cn
Signed-off-by: Anup Patel <anup@brainfault.org>
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For `perf kvm stat` on the RISC-V, in order to avoid the
occurrence of `UNKNOWN` event names, interrupts should be
reported in addition to exceptions.
testing without patch:
Event name Samples Sample% Time(ns)
--------------------------- -------- -------- ------------
STORE_GUEST_PAGE_FAULT 1496461 53.00% 889612544
UNKNOWN 887514 31.00% 272857968
LOAD_GUEST_PAGE_FAULT 305164 10.00% 189186331
VIRTUAL_INST_FAULT 70625 2.00% 134114260
SUPERVISOR_SYSCALL 32014 1.00% 58577110
INST_GUEST_PAGE_FAULT 1 0.00% 2545
testing with patch:
Event name Samples Sample% Time(ns)
--------------------------- -------- -------- ------------
IRQ_S_TIMER 211271 58.00% 738298680600
EXC_STORE_GUEST_PAGE_FAULT 111279 30.00% 130725914800
EXC_LOAD_GUEST_PAGE_FAULT 22039 6.00% 25441480600
EXC_VIRTUAL_INST_FAULT 8913 2.00% 21015381600
IRQ_VS_EXT 4748 1.00% 10155464300
IRQ_S_EXT 2802 0.00% 13288775800
IRQ_S_SOFT 1998 0.00% 4254129300
Signed-off-by: Quan Zhou <zhouquan@iscas.ac.cn>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Link: https://lore.kernel.org/r/9693132df4d0f857b8be3a75750c36b40213fcc0.1726211632.git.zhouquan@iscas.ac.cn
Signed-off-by: Anup Patel <anup@brainfault.org>
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Enable ring-based dirty memory tracking on riscv:
- Enable CONFIG_HAVE_KVM_DIRTY_RING_ACQ_REL as riscv is weakly
ordered.
- Set KVM_DIRTY_LOG_PAGE_OFFSET for the ring buffer's physical page
offset.
- Add a check to kvm_vcpu_kvm_riscv_check_vcpu_requests for checking
whether the dirty ring is soft full.
To handle vCPU requests that cause exits to userspace, modified the
`kvm_riscv_check_vcpu_requests` to return a value (currently only
returns 0 or 1).
Signed-off-by: Quan Zhou <zhouquan@iscas.ac.cn>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20e116efb1f7aff211dd8e3cf8990c5521ed5f34.1749810735.git.zhouquan@iscas.ac.cn
Signed-off-by: Anup Patel <anup@brainfault.org>
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The Smnpm extension requires special handling because the guest ISA
extension maps to a different extension (Ssnpm) on the host side.
commit 1851e7836212 ("RISC-V: KVM: Allow Smnpm and Ssnpm extensions for
guests") missed that the vcpu->arch.isa bit is based only on the host
extension, so currently both KVM_RISCV_ISA_EXT_{SMNPM,SSNPM} map to
vcpu->arch.isa[RISCV_ISA_EXT_SSNPM]. This does not cause any problems
for the guest, because both extensions are force-enabled anyway when the
host supports Ssnpm, but prevents checking for (guest) Smnpm in the SBI
FWFT logic.
Redefine kvm_isa_ext_arr to look up the guest extension, since only the
guest -> host mapping is unambiguous. Factor out the logic for checking
for host support of an extension, so this special case only needs to be
handled in one place, and be explicit about which variables hold a host
vs a guest ISA extension.
Fixes: 1851e7836212 ("RISC-V: KVM: Allow Smnpm and Ssnpm extensions for guests")
Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20250111004702.2813013-2-samuel.holland@sifive.com
Signed-off-by: Anup Patel <anup@brainfault.org>
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Delegate illegal instruction fault to VS mode by default to avoid such
exceptions being trapped to HS and redirected back to VS.
The delegation of illegal instruction fault is particularly important
to guest applications that use vector instructions frequently. In such
cases, an illegal instruction fault will be raised when guest user thread
uses vector instruction the first time and then guest kernel will enable
user thread to execute following vector instructions.
The fw pmu event counter remains undeleted so that guest can still query
illegal instruction events via sbi call. Guest will only see zero count
on illegal instruction faults and know 'firmware' has delegated it.
Reviewed-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Xu Lu <luxu.kernel@bytedance.com>
Link: https://lore.kernel.org/r/20250714094554.89151-1-luxu.kernel@bytedance.com
Signed-off-by: Anup Patel <anup@brainfault.org>
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Currently, all kvm_riscv_hfence_xyz() APIs assume VMID to be the
host VMID of the Guest/VM which resticts use of these APIs only
for host TLB maintenance. Let's allow passing VMID as a parameter
to all kvm_riscv_hfence_xyz() APIs so that they can be re-used
for nested virtualization related TLB maintenance.
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Tested-by: Atish Patra <atishp@rivosinc.com>
Reviewed-by: Nutty Liu <liujingqi@lanxincomputing.com>
Link: https://lore.kernel.org/r/20250618113532.471448-13-apatel@ventanamicro.com
Signed-off-by: Anup Patel <anup@brainfault.org>
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The upcoming nested virtualization can share g-stage page table
management with the current host g-stage implementation hence
factor-out g-stage page table management as separate sources
and also use "kvm_riscv_mmu_" prefix for host g-stage functions.
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Tested-by: Atish Patra <atishp@rivosinc.com>
Reviewed-by: Nutty Liu <liujingqi@lanxincomputing.com>
Link: https://lore.kernel.org/r/20250618113532.471448-12-apatel@ventanamicro.com
Signed-off-by: Anup Patel <anup@brainfault.org>
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Currently, the struct kvm_riscv_hfence does not have vmid field
and various hfence processing functions always pick vmid assigned
to the guest/VM. This prevents us from doing hfence operation on
arbitrary vmid hence add vmid field to struct kvm_riscv_hfence
and use it wherever applicable.
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Tested-by: Atish Patra <atishp@rivosinc.com>
Reviewed-by: Nutty Liu <liujingqi@lanxincomputing.com>
Link: https://lore.kernel.org/r/20250618113532.471448-11-apatel@ventanamicro.com
Signed-off-by: Anup Patel <anup@brainfault.org>
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Introduce struct kvm_gstage_mapping which represents a g-stage
mapping at a particular g-stage page table level. Also, update
the kvm_riscv_gstage_map() to return the g-stage mapping upon
success.
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Tested-by: Atish Patra <atishp@rivosinc.com>
Reviewed-by: Nutty Liu <liujingqi@lanxincomputing.com>
Link: https://lore.kernel.org/r/20250618113532.471448-10-apatel@ventanamicro.com
Signed-off-by: Anup Patel <anup@brainfault.org>
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The MMU, TLB, and VMID management for KVM RISC-V already exists as
seprate sources so create separate headers along these lines. This
further simplifies asm/kvm_host.h header.
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Tested-by: Atish Patra <atishp@rivosinc.com>
Reviewed-by: Nutty Liu <liujingqi@lanxincomputing.com>
Link: https://lore.kernel.org/r/20250618113532.471448-9-apatel@ventanamicro.com
Signed-off-by: Anup Patel <anup@brainfault.org>
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The H-extension CSRs accessed by kvm_riscv_vcpu_trap_redirect() will
trap when KVM RISC-V is running as Guest/VM hence remove these traps
by using ncsr_xyz() instead of csr_xyz().
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Tested-by: Atish Patra <atishp@rivosinc.com>
Reviewed-by: Nutty Liu <liujingqi@lanxincomputing.com>
Link: https://lore.kernel.org/r/20250618113532.471448-8-apatel@ventanamicro.com
Signed-off-by: Anup Patel <anup@brainfault.org>
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The kvm_arch_flush_remote_tlbs_range() expected by KVM core can be
easily implemented for RISC-V using kvm_riscv_hfence_gvma_vmid_gpa()
hence provide it.
Also with kvm_arch_flush_remote_tlbs_range() available for RISC-V, the
mmu_wp_memory_region() can happily use kvm_flush_remote_tlbs_memslot()
instead of kvm_flush_remote_tlbs().
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Tested-by: Atish Patra <atishp@rivosinc.com>
Reviewed-by: Nutty Liu <liujingqi@lanxincomputing.com>
Link: https://lore.kernel.org/r/20250618113532.471448-7-apatel@ventanamicro.com
Signed-off-by: Anup Patel <anup@brainfault.org>
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The gstage_set_pte() and gstage_op_pte() should flush TLB only when
a leaf PTE changes so that unnecessary TLB flushes can be avoided.
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Tested-by: Atish Patra <atishp@rivosinc.com>
Reviewed-by: Nutty Liu <liujingqi@lanxincomputing.com>
Link: https://lore.kernel.org/r/20250618113532.471448-6-apatel@ventanamicro.com
Signed-off-by: Anup Patel <anup@brainfault.org>
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The KVM_REQ_HFENCE_GVMA_VMID_ALL is same as KVM_REQ_TLB_FLUSH so
to avoid confusion let's replace KVM_REQ_HFENCE_GVMA_VMID_ALL with
KVM_REQ_TLB_FLUSH. Also, rename kvm_riscv_hfence_gvma_vmid_all_process()
to kvm_riscv_tlb_flush_process().
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Tested-by: Atish Patra <atishp@rivosinc.com>
Reviewed-by: Nutty Liu <liujingqi@lanxincomputing.com>
Link: https://lore.kernel.org/r/20250618113532.471448-5-apatel@ventanamicro.com
Signed-off-by: Anup Patel <anup@brainfault.org>
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The kvm_riscv_local_tlb_sanitize() deals with sanitizing current
VMID related TLB mappings when a VCPU is moved from one host CPU
to another.
Let's move kvm_riscv_local_tlb_sanitize() to VMID management
sources and rename it to kvm_riscv_gstage_vmid_sanitize().
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Tested-by: Atish Patra <atishp@rivosinc.com>
Reviewed-by: Nutty Liu <liujingqi@lanxincomputing.com>
Link: https://lore.kernel.org/r/20250618113532.471448-4-apatel@ventanamicro.com
Signed-off-by: Anup Patel <anup@brainfault.org>
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The kvm_riscv_vcpu_aia_init() does not return any failure so drop
the return value which is always zero.
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Tested-by: Atish Patra <atishp@rivosinc.com>
Reviewed-by: Nutty Liu <liujingqi@lanxincomputing.com>
Link: https://lore.kernel.org/r/20250618113532.471448-3-apatel@ventanamicro.com
Signed-off-by: Anup Patel <anup@brainfault.org>
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The kvm_riscv_vcpu_alloc_vector_context() does return an error code
upon failure so don't ignore this in kvm_arch_vcpu_create().
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Tested-by: Atish Patra <atishp@rivosinc.com>
Reviewed-by: Nutty Liu <liujingqi@lanxincomputing.com>
Link: https://lore.kernel.org/r/20250618113532.471448-2-apatel@ventanamicro.com
Signed-off-by: Anup Patel <anup@brainfault.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer fix from Thomas Gleixner:
"A single fix for the PTP systemcounter mechanism:
The rework of this mechanism added a 'use_nsec' member to struct
system_counterval. get_device_system_crosststamp() instantiates that
struct on the stack and hands a pointer to the driver callback.
Only the drivers which set use_nsec to true, initialize that field,
but all others ignore it. As get_device_system_crosststamp() does not
initialize the struct, the use_nsec field contains random stack
content in those cases. That causes a miscalulation usually resulting
in a failing range check in the best case.
Initialize the structure before handing it to the drivers to cure
that"
* tag 'timers-urgent-2025-07-27' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
timekeeping: Zero initialize system_counterval when querying time from phc drivers
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git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
Pull spi fix from Mark Brown:
"One last fix for v6.16, removing some hard coding to avoid data
corruption on some NAND devices in the QPIC driver"
* tag 'spi-fix-v6.16-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
spi: spi-qpic-snand: don't hardcode ECC steps
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git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
Pull i2c fixes from Wolfram Sang:
- qup: avoid potential hang when waiting for bus idle
- tegra: improve ACPI reset error handling
- virtio: use interruptible wait to prevent hang during transfer
* tag 'i2c-for-6.16-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
i2c: qup: jump out of the loop in case of timeout
i2c: virtio: Avoid hang by using interruptible completion wait
i2c: tegra: Fix reset error handling with ACPI
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git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux
Pull clk fixes from Stephen Boyd:
"A few Allwinner clk driver fixes:
- Mark Allwinner A523 MBUS clock as critical to avoid
system stalls
- Fix names of CSI related clocks on Allwinner V3s. This
includes changes to the driver, DT bindings and DT files.
- Fix parents of TCON clock on Allwinner V3s"
* tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
clk: sunxi-ng: v3s: Fix TCON clock parents
clk: sunxi-ng: v3s: Fix CSI1 MCLK clock name
clk: sunxi-ng: v3s: Fix CSI SCLK clock name
clk: sunxi-ng: a523: Mark MBUS clock as critical
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Pull ARM fixes from Russell King:
- use an absolute path for asm/unified.h in KBUILD_AFLAGS to solve a
regression caused by commit d5c8d6e0fa61 ("kbuild: Update assembler
calls to use proper flags and language target")
- fix dead code elimination binutils version check again
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rmk/linux:
ARM: 9450/1: Fix allowing linker DCE with binutils < 2.36
ARM: 9448/1: Use an absolute path to unified.h in KBUILD_AFLAGS
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git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull SoC fixes from Arnd Bergmann:
"These are two fixes that came in late, one addresses a regression on a
rockchips based board, the other is for ensuring a consistent dt
binding for a device added in 6.16 before the incorrect one makes it
into a release"
* tag 'soc-fixes-6.16-3' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc:
arm64: dts: rockchip: Drop netdev led-triggers on NanoPi R5S
arm64: dts: allwinner: a523: Rename emac0 to gmac0
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git://git.kernel.org/pub/scm/linux/kernel/git/andi.shyti/linux into i2c/for-current
i2c-host-fixes for v6.16-rc8
qup: avoid potential hang when waiting for bus idle
tegra: improve ACPI reset error handling
virtio: use interruptible wait to prevent hang during transfer
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Pull drm fixes (part 2) from Dave Airlie:
"Just the follow up fixes for i915 and xe, all pretty minor.
i915:
- Fix DP 2.7 Gbps DP_LINK_BW value on g4x
- Fix return value on intel_atomic_commit_fence_wait
xe:
- Fix build without debugfs"
* tag 'drm-fixes-2025-07-26' of https://gitlab.freedesktop.org/drm/kernel:
drm/xe: Fix build without debugfs
drm/i915/display: Fix dma_fence_wait_timeout() return value handling
drm/i915/dp: Fix 2.7 Gbps DP_LINK_BW value on g4x
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Pull block fix from Jens Axboe:
"Just a single fix for regression in this release, where a module
reference could be leaked"
* tag 'block-6.16-20250725' of git://git.kernel.dk/linux:
block: fix module reference leak in mq-deadline I/O scheduler
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git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull vfs fixes from Christian Brauner:
"Two last-minute fixes for this cycle:
- Set afs vllist to NULL if addr parsing fails
- Add a missing check for reaching the end of the string in afs"
* tag 'vfs-6.16-rc8.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
afs: Set vllist to NULL if addr parsing fails
afs: Fix check for NULL terminator
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Pull bcachefs fixes from Kent Overstreet:
"User reported fixes:
- Fix btree node scan on encrypted filesystems by not using btree
node header fields encrypted
- Fix a race in btree write buffer flush; this caused EROs primarily
during fsck for some people"
* tag 'bcachefs-2025-07-24' of git://evilpiepirate.org/bcachefs:
bcachefs: Add missing snapshots_seen_add_inorder()
bcachefs: Fix write buffer flushing from open journal entry
bcachefs: btree_node_scan: don't re-read before initializing found_btree_node
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Commit e7607f7d6d81 ("ARM: 9443/1: Require linker to support KEEP within
OVERLAY for DCE") accidentally broke the binutils version restriction
that was added in commit 0d437918fb64 ("ARM: 9414/1: Fix build issue
with LD_DEAD_CODE_DATA_ELIMINATION"), reintroducing the segmentation
fault addressed by that workaround.
Restore the binutils version dependency by using
CONFIG_LD_CAN_USE_KEEP_IN_OVERLAY as an additional condition to ensure
that CONFIG_HAVE_LD_DEAD_CODE_DATA_ELIMINATION is only enabled with
binutils >= 2.36 and ld.lld >= 21.0.0.
Closes: https://lore.kernel.org/6739da7d-e555-407a-b5cb-e5681da71056@landley.net/
Closes: https://lore.kernel.org/CAFERDQ0zPoya5ZQfpbeuKVZEo_fKsonLf6tJbp32QnSGAtbi+Q@mail.gmail.com/
Cc: stable@vger.kernel.org
Fixes: e7607f7d6d81 ("ARM: 9443/1: Require linker to support KEEP within OVERLAY for DCE")
Reported-by: Rob Landley <rob@landley.net>
Tested-by: Rob Landley <rob@landley.net>
Reported-by: Martin Wetterwald <martin@wetterwald.eu>
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
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After commit d5c8d6e0fa61 ("kbuild: Update assembler calls to use proper
flags and language target"), which updated as-instr to use the
'assembler-with-cpp' language option, the Kbuild version of as-instr
always fails internally for arch/arm with
<command-line>: fatal error: asm/unified.h: No such file or directory
compilation terminated.
because '-include' flags are now taken into account by the compiler
driver and as-instr does not have '$(LINUXINCLUDE)', so unified.h is not
found.
This went unnoticed at the time of the Kbuild change because the last
use of as-instr in Kbuild that arch/arm could reach was removed in 5.7
by commit 541ad0150ca4 ("arm: Remove 32bit KVM host support") but a
stable backport of the Kbuild change to before that point exposed this
potential issue if one were to be reintroduced.
Follow the general pattern of '-include' paths throughout the tree and
make unified.h absolute using '$(srctree)' to ensure KBUILD_AFLAGS can
be used independently.
Closes: https://lore.kernel.org/CACo-S-1qbCX4WAVFA63dWfHtrRHZBTyyr2js8Lx=Az03XHTTHg@mail.gmail.com/
Cc: stable@vger.kernel.org
Fixes: d5c8d6e0fa61 ("kbuild: Update assembler calls to use proper flags and language target")
Reported-by: KernelCI bot <bot@kernelci.org>
Reviewed-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
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This fixes an infinite loop when repairing "extent past end of inode",
when the extent is an older snapshot than the inode that needs repair.
Without the snaphsots_seen_add_inorder() we keep trying to delete the
same extent, even though it's no longer visible in the inode's snapshot.
Fixes: 63d6e9311999 ("bcachefs: bch2_fpunch_snapshot()")
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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When flushing the btree write buffer, we pull write buffer keys directly
from the journal instead of letting the journal write path copy them to
the write buffer.
When flushing from the currently open journal buffer, we have to block
new reservations and wait for outstanding reservations to complete.
Recheck the reservation state after blocking new reservations:
previously, we were checking the reservation count from before calling
__journal_block().
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull misc fixes from Andrew Morton:
"11 hotfixes. 9 are cc:stable and the remainder address post-6.15
issues or aren't considered necessary for -stable kernels.
7 are for MM"
* tag 'mm-hotfixes-stable-2025-07-24-18-03' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
sprintf.h requires stdarg.h
resource: fix false warning in __request_region()
mm/damon/core: commit damos_quota_goal->nid
kasan: use vmalloc_dump_obj() for vmalloc error reports
mm/ksm: fix -Wsometimes-uninitialized from clang-21 in advisor_mode_show()
mm: update MAINTAINERS entry for HMM
nilfs2: reject invalid file types when reading inodes
selftests/mm: fix split_huge_page_test for folio_split() tests
mailmap: add entry for Senozhatsky
mm/zsmalloc: do not pass __GFP_MOVABLE if CONFIG_COMPACTION=n
mm/vmscan: fix hwpoisoned large folio handling in shrink_folio_list
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https://gitlab.freedesktop.org/drm/xe/kernel into drm-fixes
Driver Changes:
- Fix build without debugfs (Lucas)
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Thomas Hellstrom <thomas.hellstrom@linux.intel.com>
Link: https://lore.kernel.org/r/aIKWC2RPlbRxZc5o@fedora
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In file included from drivers/crypto/intel/qat/qat_common/adf_pm_dbgfs_utils.c:4:
include/linux/sprintf.h:11:54: error: unknown type name 'va_list'
11 | __printf(2, 0) int vsprintf(char *buf, const char *, va_list);
| ^~~~~~~
include/linux/sprintf.h:1:1: note: 'va_list' is defined in header '<stdarg.h>'; this is probably fixable by adding '#include <stdarg.h>'
Link: https://lkml.kernel.org/r/20250721173754.42865913@canb.auug.org.au
Fixes: 39ced19b9e60 ("lib/vsprintf: split out sprintf() and friends")
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Andriy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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A warning is raised when __request_region() detects a conflict with a
resource whose resource.desc is IORES_DESC_DEVICE_PRIVATE_MEMORY.
But this warning is only valid for iomem_resources.
The hmem device resource uses resource.desc as the numa node id, which can
cause spurious warnings.
This warning appeared on a machine with multiple cxl memory expanders.
One of the NUMA node id is 6, which is the same as the value of
IORES_DESC_DEVICE_PRIVATE_MEMORY.
In this environment it was just a spurious warning, but when I saw the
warning I suspected a real problem so it's better to fix it.
This change fixes this by restricting the warning to only iomem_resource.
This also adds a missing new line to the warning message.
Link: https://lkml.kernel.org/r/20250719112604.25500-1-akinobu.mita@gmail.com
Fixes: 7dab174e2e27 ("dax/hmem: Move hmem device registration to dax_hmem.ko")
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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DAMOS quota goal uses 'nid' field when the metric is
DAMOS_QUOTA_NODE_MEM_{USED,FREE}_BP. But the goal commit function is not
updating the goal's nid field. Fix it.
Link: https://lkml.kernel.org/r/20250719181932.72944-1-sj@kernel.org
Fixes: 0e1c773b501f ("mm/damon/core: introduce damos quota goal metrics for memory node utilization") [6.16.x]
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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