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This reverts commit 8401a108a63302a5a198c7075d857895ca624851.
I got a report from an (anonymous) Sundance user:
Ethernet controller: Sundance Technology Inc / IC Plus Corp IC Plus IP100A Integrated 10/100 Ethernet MAC + PHY (rev 31)
Revert the driver back in. Make following changes:
- update Denis's email address in MAINTAINERS
- adjust to timer API renames:
- del_timer_sync() -> timer_delete_sync()
- from_timer() -> timer_container_of()
Fixes: 8401a108a633 ("eth: remove the DLink/Sundance (ST201) driver")
Reviewed-by: Simon Horman <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>
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Fix shellcheck warning such as
"Double quote to prevent globbing and word splitting." and
Use $(...) notation instead of legacy backticks `...`.
Tested-by: Venkat Rao Bagalkote <[email protected]>
Signed-off-by: Madhavan Srinivasan <[email protected]>
Link: https://patch.msgid.link/[email protected]
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Fix "Double quote to prevent globbing and word splitting."
warning from shellcheck
Tested-by: Venkat Rao Bagalkote <[email protected]>
Reviewed-by: Stephen Rothwell <[email protected]>
Signed-off-by: Madhavan Srinivasan <[email protected]>
Link: https://patch.msgid.link/[email protected]
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When compiling for pseries or powernv defconfig with "make C=1",
these warning were reported bu sparse tool in powerpc/kernel/kvm.c
arch/powerpc/kernel/kvm.c:635:9: warning: switch with no cases
arch/powerpc/kernel/kvm.c:646:9: warning: switch with no cases
Currently #ifdef were added after the switch case which are specific
for BOOKE and PPC_BOOK3S_32. These are not enabled in pseries/powernv
defconfig. Fix it by moving the #ifdef before switch(){}
Fixes: cbe487fac7fc0 ("KVM: PPC: Add mtsrin PV code")
Tested-by: Venkat Rao Bagalkote <[email protected]>
Signed-off-by: Madhavan Srinivasan <[email protected]>
Link: https://patch.msgid.link/[email protected]
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There are two CONFIG_POWERPC64_CPU entries in the "CPU selection"
choice block.
I guess the intent is to display a different prompt depending on
CPU_LITTLE_ENDIAN: "Generic (POWER5 and PowerPC 970 and above)" for big
endian, and "Generic (POWER8 and above)" for little endian.
I stumbled on this tricky use case, and worked around it on Kconfig with
commit 4d46b5b623e0 ("kconfig: fix infinite loop in sym_calc_choice()").
However, I doubt that supporting multiple entries with the same symbol
in a choice block is worth the complexity - this is the only such case
in the kernel tree.
This commit merges the two entries. Once this cleanup is accepted in
the powerpc subsystem, I will proceed to refactor the Kconfig parser.
Signed-off-by: Masahiro Yamada <[email protected]>
Reviewed-by: Christophe Leroy <[email protected]>
Acked-by: Michael Ellerman <[email protected]>
Signed-off-by: Madhavan Srinivasan <[email protected]>
Link: https://patch.msgid.link/[email protected]
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The extra-y syntax is planned for deprecation because it is similar
to always-y.
When building the boot wrapper, always-y and extra-y are equivalent.
Use always-y instead.
In arch/powerpc/kernel/Makefile, I added ifdef KBUILD_BUILTIN to
keep the current behavior: prom_init_check is skipped when building
only modular objects.
Signed-off-by: Masahiro Yamada <[email protected]>
Acked-by: Michael Ellerman <[email protected]>
Signed-off-by: Madhavan Srinivasan <[email protected]>
Link: https://patch.msgid.link/[email protected]
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Simplify the code to enhance readability and maintain a consistent
coding style.
Signed-off-by: Xichao Zhao <[email protected]>
Acked-by: Gautam Menghani <[email protected]>
Signed-off-by: Madhavan Srinivasan <[email protected]>
Link: https://patch.msgid.link/[email protected]
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irq_domain_create_simple() takes fwnode as the first argument. It can be
extracted from the struct device using dev_fwnode() helper instead of
using of_node with of_fwnode_handle().
So use the dev_fwnode() helper.
Signed-off-by: Jiri Slaby (SUSE) <[email protected]>
Acked-by: Christophe Leroy <[email protected]>
Link: https://lore.kernel.org/all/[email protected]/
Signed-off-by: Madhavan Srinivasan <[email protected]>
Link: https://patch.msgid.link/[email protected]
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Until commit 6c85f52b10fd ("kvm/ppc: IRQ disabling cleanup"),
kvmppc_prepare_to_enter() was called with interrupts already disabled by
the caller, which was documented in the comment above the function.
Post-cleanup, the function is now called with interrupts enabled, and
disables interrupts itself.
Fix the comment to reflect the current behaviour.
Fixes: 6c85f52b10fd ("kvm/ppc: IRQ disabling cleanup")
Signed-off-by: Andrew Donnellan <[email protected]>
Reviewed-by: Amit Machhiwal <[email protected]>
Reviewed-by: Gautam Menghani <[email protected]>
Reviewed-by: Shrikanth Hegde <[email protected]>
[Fixed the double colon in Reviewed-by line]
Signed-off-by: Madhavan Srinivasan <[email protected]>
Link: https://patch.msgid.link/[email protected]
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The conversion of all GPIO drivers to using the .set_rv() and
.set_multiple_rv() callbacks from struct gpio_chip (which - unlike their
predecessors - return an integer and allow the controller drivers to
indicate failures to users) is now complete and the legacy ones have
been removed. Rename the new callbacks back to their original names in
one sweeping change.
Signed-off-by: Bartosz Golaszewski <[email protected]>
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git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Madhavan Srinivasan:
- Fixes for several issues in the powernv PCI hotplug path
- Fix htmldoc generation for htm.rst in toctree
- Add jit support for load_acquire and store_release in ppc64 bpf jit
Thanks to Bjorn Helgaas, Hari Bathini, Puranjay Mohan, Saket Kumar
Bhaskar, Shawn Anastasio, Timothy Pearson, and Vishal Parmar
* tag 'powerpc-6.17-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc64/bpf: Add jit support for load_acquire and store_release
docs: powerpc: add htm.rst to toctree
PCI: pnv_php: Enable third attention indicator state
PCI: pnv_php: Fix surprise plug detection and recovery
powerpc/eeh: Make EEH driver device hotplug safe
powerpc/eeh: Export eeh_unfreeze_pe()
PCI: pnv_php: Work around switches with broken presence detection
PCI: pnv_php: Clean up allocated IRQs on unplug
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Add JIT support for the load_acquire and store_release instructions. The
implementation is similar to the kernel where:
load_acquire => plain load -> lwsync
store_release => lwsync -> plain store
To test the correctness of the implementation, following selftests were
run:
[fedora@linux-kernel bpf]$ sudo ./test_progs -a \
verifier_load_acquire,verifier_store_release,atomics
#11/1 atomics/add:OK
#11/2 atomics/sub:OK
#11/3 atomics/and:OK
#11/4 atomics/or:OK
#11/5 atomics/xor:OK
#11/6 atomics/cmpxchg:OK
#11/7 atomics/xchg:OK
#11 atomics:OK
#519/1 verifier_load_acquire/load-acquire, 8-bit:OK
#519/2 verifier_load_acquire/load-acquire, 8-bit @unpriv:OK
#519/3 verifier_load_acquire/load-acquire, 16-bit:OK
#519/4 verifier_load_acquire/load-acquire, 16-bit @unpriv:OK
#519/5 verifier_load_acquire/load-acquire, 32-bit:OK
#519/6 verifier_load_acquire/load-acquire, 32-bit @unpriv:OK
#519/7 verifier_load_acquire/load-acquire, 64-bit:OK
#519/8 verifier_load_acquire/load-acquire, 64-bit @unpriv:OK
#519/9 verifier_load_acquire/load-acquire with uninitialized
src_reg:OK
#519/10 verifier_load_acquire/load-acquire with uninitialized src_reg
@unpriv:OK
#519/11 verifier_load_acquire/load-acquire with non-pointer src_reg:OK
#519/12 verifier_load_acquire/load-acquire with non-pointer src_reg
@unpriv:OK
#519/13 verifier_load_acquire/misaligned load-acquire:OK
#519/14 verifier_load_acquire/misaligned load-acquire @unpriv:OK
#519/15 verifier_load_acquire/load-acquire from ctx pointer:OK
#519/16 verifier_load_acquire/load-acquire from ctx pointer @unpriv:OK
#519/17 verifier_load_acquire/load-acquire with invalid register R15:OK
#519/18 verifier_load_acquire/load-acquire with invalid register R15
@unpriv:OK
#519/19 verifier_load_acquire/load-acquire from pkt pointer:OK
#519/20 verifier_load_acquire/load-acquire from flow_keys pointer:OK
#519/21 verifier_load_acquire/load-acquire from sock pointer:OK
#519 verifier_load_acquire:OK
#556/1 verifier_store_release/store-release, 8-bit:OK
#556/2 verifier_store_release/store-release, 8-bit @unpriv:OK
#556/3 verifier_store_release/store-release, 16-bit:OK
#556/4 verifier_store_release/store-release, 16-bit @unpriv:OK
#556/5 verifier_store_release/store-release, 32-bit:OK
#556/6 verifier_store_release/store-release, 32-bit @unpriv:OK
#556/7 verifier_store_release/store-release, 64-bit:OK
#556/8 verifier_store_release/store-release, 64-bit @unpriv:OK
#556/9 verifier_store_release/store-release with uninitialized
src_reg:OK
#556/10 verifier_store_release/store-release with uninitialized src_reg
@unpriv:OK
#556/11 verifier_store_release/store-release with uninitialized
dst_reg:OK
#556/12 verifier_store_release/store-release with uninitialized dst_reg
@unpriv:OK
#556/13 verifier_store_release/store-release with non-pointer
dst_reg:OK
#556/14 verifier_store_release/store-release with non-pointer dst_reg
@unpriv:OK
#556/15 verifier_store_release/misaligned store-release:OK
#556/16 verifier_store_release/misaligned store-release @unpriv:OK
#556/17 verifier_store_release/store-release to ctx pointer:OK
#556/18 verifier_store_release/store-release to ctx pointer @unpriv:OK
#556/19 verifier_store_release/store-release, leak pointer to stack:OK
#556/20 verifier_store_release/store-release, leak pointer to stack
@unpriv:OK
#556/21 verifier_store_release/store-release, leak pointer to map:OK
#556/22 verifier_store_release/store-release, leak pointer to map
@unpriv:OK
#556/23 verifier_store_release/store-release with invalid register
R15:OK
#556/24 verifier_store_release/store-release with invalid register R15
@unpriv:OK
#556/25 verifier_store_release/store-release to pkt pointer:OK
#556/26 verifier_store_release/store-release to flow_keys pointer:OK
#556/27 verifier_store_release/store-release to sock pointer:OK
#556 verifier_store_release:OK
Summary: 3/55 PASSED, 0 SKIPPED, 0 FAILED
Signed-off-by: Puranjay Mohan <[email protected]>
Tested-by: Saket Kumar Bhaskar <[email protected]>
Reviewed-by: Hari Bathini <[email protected]>
Signed-off-by: Madhavan Srinivasan <[email protected]>
Link: https://patch.msgid.link/[email protected]
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The existing PowerNV hotplug code did not handle surprise plug events
correctly, leading to a complete failure of the hotplug system after device
removal and a required reboot to detect new devices.
This comes down to two issues:
1) When a device is surprise removed, often the bridge upstream
port will cause a PE freeze on the PHB. If this freeze is not
cleared, the MSI interrupts from the bridge hotplug notification
logic will not be received by the kernel, stalling all plug events
on all slots associated with the PE.
2) When a device is removed from a slot, regardless of surprise or
programmatic removal, the associated PHB/PE ls left frozen.
If this freeze is not cleared via a fundamental reset, skiboot
is unable to clear the freeze and cannot retrain / rescan the
slot. This also requires a reboot to clear the freeze and redetect
the device in the slot.
Issue the appropriate unfreeze and rescan commands on hotplug events,
and don't oops on hotplug if pci_bus_to_OF_node() returns NULL.
Signed-off-by: Timothy Pearson <[email protected]>
[bhelgaas: tidy comments]
Signed-off-by: Bjorn Helgaas <[email protected]>
Signed-off-by: Madhavan Srinivasan <[email protected]>
Link: https://patch.msgid.link/171044224.1359864.1752615546988.JavaMail.zimbra@raptorengineeringinc.com
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Multiple race conditions existed between the PCIe hotplug driver and the
EEH driver, leading to a variety of kernel oopses of the same general
nature:
<pcie device unplug>
<eeh driver trigger>
<hotplug removal trigger>
<pcie tree reconfiguration>
<eeh recovery next step>
<oops in EEH driver bus iteration loop>
A second class of oops is also seen when the underlying bus disappears
during device recovery.
Refactor the EEH module to be PCI rescan and remove safe. Also clean
up a few minor formatting / readability issues.
Signed-off-by: Timothy Pearson <[email protected]>
Signed-off-by: Bjorn Helgaas <[email protected]>
Signed-off-by: Madhavan Srinivasan <[email protected]>
Link: https://patch.msgid.link/1334208367.1359861.1752615503144.JavaMail.zimbra@raptorengineeringinc.com
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The PowerNV hotplug driver needs to be able to clear any frozen PE(s)
on the PHB after suprise removal of a downstream device.
Export the eeh_unfreeze_pe() symbol to allow implementation of this
functionality in the php_nv module.
Signed-off-by: Timothy Pearson <[email protected]>
Signed-off-by: Bjorn Helgaas <[email protected]>
Signed-off-by: Madhavan Srinivasan <[email protected]>
Link: https://patch.msgid.link/1778535414.1359858.1752615454618.JavaMail.zimbra@raptorengineeringinc.com
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git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull non-MM updates from Andrew Morton:
"Significant patch series in this pull request:
- "squashfs: Remove page->mapping references" (Matthew Wilcox) gets
us closer to being able to remove page->mapping
- "relayfs: misc changes" (Jason Xing) does some maintenance and
minor feature addition work in relayfs
- "kdump: crashkernel reservation from CMA" (Jiri Bohac) switches
us from static preallocation of the kdump crashkernel's working
memory over to dynamic allocation. So the difficulty of a-priori
estimation of the second kernel's needs is removed and the first
kernel obtains extra memory
- "generalize panic_print's dump function to be used by other
kernel parts" (Feng Tang) implements some consolidation and
rationalization of the various ways in which a failing kernel
splats information at the operator
* tag 'mm-nonmm-stable-2025-08-03-12-47' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (80 commits)
tools/getdelays: add backward compatibility for taskstats version
kho: add test for kexec handover
delaytop: enhance error logging and add PSI feature description
samples: Kconfig: fix spelling mistake "instancess" -> "instances"
fat: fix too many log in fat_chain_add()
scripts/spelling.txt: add notifer||notifier to spelling.txt
xen/xenbus: fix typo "notifer"
net: mvneta: fix typo "notifer"
drm/xe: fix typo "notifer"
cxl: mce: fix typo "notifer"
KVM: x86: fix typo "notifer"
MAINTAINERS: add maintainers for delaytop
ucount: use atomic_long_try_cmpxchg() in atomic_long_inc_below()
ucount: fix atomic_long_inc_below() argument type
kexec: enable CMA based contiguous allocation
stackdepot: make max number of pools boot-time configurable
lib/xxhash: remove unused functions
init/Kconfig: restore CONFIG_BROKEN help text
lib/raid6: update recov_rvv.c zero page usage
docs: update docs after introducing delaytop
...
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Patch series "kdump: crashkernel reservation from CMA", v5.
This series implements a way to reserve additional crash kernel memory
using CMA.
Currently, all the memory for the crash kernel is not usable by the 1st
(production) kernel. It is also unmapped so that it can't be corrupted by
the fault that will eventually trigger the crash. This makes sense for
the memory actually used by the kexec-loaded crash kernel image and initrd
and the data prepared during the load (vmcoreinfo, ...). However, the
reserved space needs to be much larger than that to provide enough
run-time memory for the crash kernel and the kdump userspace. Estimating
the amount of memory to reserve is difficult. Being too careful makes
kdump likely to end in OOM, being too generous takes even more memory from
the production system. Also, the reservation only allows reserving a
single contiguous block (or two with the "low" suffix). I've seen systems
where this fails because the physical memory is fragmented.
By reserving additional crashkernel memory from CMA, the main crashkernel
reservation can be just large enough to fit the kernel and initrd image,
minimizing the memory taken away from the production system. Most of the
run-time memory for the crash kernel will be memory previously available
to userspace in the production system. As this memory is no longer
wasted, the reservation can be done with a generous margin, making kdump
more reliable. Kernel memory that we need to preserve for dumping is
normally not allocated from CMA, unless it is explicitly allocated as
movable. Currently this is only the case for memory ballooning and zswap.
Such movable memory will be missing from the vmcore. User data is
typically not dumped by makedumpfile. When dumping of user data is
intended this new CMA reservation cannot be used.
There are five patches in this series:
The first adds a new ",cma" suffix to the recenly introduced generic
crashkernel parsing code. parse_crashkernel() takes one more argument to
store the cma reservation size.
The second patch implements reserve_crashkernel_cma() which performs the
reservation. If the requested size is not available in a single range,
multiple smaller ranges will be reserved.
The third patch updates Documentation/, explicitly mentioning the
potential DMA corruption of the CMA-reserved memory.
The fourth patch adds a short delay before booting the kdump kernel,
allowing pending DMA transfers to finish.
The fifth patch enables the functionality for x86 as a proof of
concept. There are just three things every arch needs to do:
- call reserve_crashkernel_cma()
- include the CMA-reserved ranges in the physical memory map
- exclude the CMA-reserved ranges from the memory available
through /proc/vmcore by excluding them from the vmcoreinfo
PT_LOAD ranges.
Adding other architectures is easy and I can do that as soon as this
series is merged.
With this series applied, specifying
crashkernel=100M craskhernel=1G,cma
on the command line will make a standard crashkernel reservation
of 100M, where kexec will load the kernel and initrd.
An additional 1G will be reserved from CMA, still usable by the production
system. The crash kernel will have 1.1G memory available. The 100M can
be reliably predicted based on the size of the kernel and initrd.
The new cma suffix is completely optional. When no
crashkernel=size,cma is specified, everything works as before.
This patch (of 5):
Add a new cma_size parameter to parse_crashkernel(). When not NULL, call
__parse_crashkernel to parse the CMA reservation size from
"crashkernel=size,cma" and store it in cma_size.
Set cma_size to NULL in all calls to parse_crashkernel().
Link: https://lkml.kernel.org/r/[email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Jiri Bohac <[email protected]>
Cc: Baoquan He <[email protected]>
Cc: Dave Young <[email protected]>
Cc: Donald Dutile <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Philipp Rudo <[email protected]>
Cc: Pingfan Liu <[email protected]>
Cc: Tao Liu <[email protected]>
Cc: Vivek Goyal <[email protected]>
Cc: David Hildenbrand <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
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git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull MM updates from Andrew Morton:
"As usual, many cleanups. The below blurbiage describes 42 patchsets.
21 of those are partially or fully cleanup work. "cleans up",
"cleanup", "maintainability", "rationalizes", etc.
I never knew the MM code was so dirty.
"mm: ksm: prevent KSM from breaking merging of new VMAs" (Lorenzo Stoakes)
addresses an issue with KSM's PR_SET_MEMORY_MERGE mode: newly
mapped VMAs were not eligible for merging with existing adjacent
VMAs.
"mm/damon: introduce DAMON_STAT for simple and practical access monitoring" (SeongJae Park)
adds a new kernel module which simplifies the setup and usage of
DAMON in production environments.
"stop passing a writeback_control to swap/shmem writeout" (Christoph Hellwig)
is a cleanup to the writeback code which removes a couple of
pointers from struct writeback_control.
"drivers/base/node.c: optimization and cleanups" (Donet Tom)
contains largely uncorrelated cleanups to the NUMA node setup and
management code.
"mm: userfaultfd: assorted fixes and cleanups" (Tal Zussman)
does some maintenance work on the userfaultfd code.
"Readahead tweaks for larger folios" (Ryan Roberts)
implements some tuneups for pagecache readahead when it is reading
into order>0 folios.
"selftests/mm: Tweaks to the cow test" (Mark Brown)
provides some cleanups and consistency improvements to the
selftests code.
"Optimize mremap() for large folios" (Dev Jain)
does that. A 37% reduction in execution time was measured in a
memset+mremap+munmap microbenchmark.
"Remove zero_user()" (Matthew Wilcox)
expunges zero_user() in favor of the more modern memzero_page().
"mm/huge_memory: vmf_insert_folio_*() and vmf_insert_pfn_pud() fixes" (David Hildenbrand)
addresses some warts which David noticed in the huge page code.
These were not known to be causing any issues at this time.
"mm/damon: use alloc_migrate_target() for DAMOS_MIGRATE_{HOT,COLD" (SeongJae Park)
provides some cleanup and consolidation work in DAMON.
"use vm_flags_t consistently" (Lorenzo Stoakes)
uses vm_flags_t in places where we were inappropriately using other
types.
"mm/memfd: Reserve hugetlb folios before allocation" (Vivek Kasireddy)
increases the reliability of large page allocation in the memfd
code.
"mm: Remove pXX_devmap page table bit and pfn_t type" (Alistair Popple)
removes several now-unneeded PFN_* flags.
"mm/damon: decouple sysfs from core" (SeongJae Park)
implememnts some cleanup and maintainability work in the DAMON
sysfs layer.
"madvise cleanup" (Lorenzo Stoakes)
does quite a lot of cleanup/maintenance work in the madvise() code.
"madvise anon_name cleanups" (Vlastimil Babka)
provides additional cleanups on top or Lorenzo's effort.
"Implement numa node notifier" (Oscar Salvador)
creates a standalone notifier for NUMA node memory state changes.
Previously these were lumped under the more general memory
on/offline notifier.
"Make MIGRATE_ISOLATE a standalone bit" (Zi Yan)
cleans up the pageblock isolation code and fixes a potential issue
which doesn't seem to cause any problems in practice.
"selftests/damon: add python and drgn based DAMON sysfs functionality tests" (SeongJae Park)
adds additional drgn- and python-based DAMON selftests which are
more comprehensive than the existing selftest suite.
"Misc rework on hugetlb faulting path" (Oscar Salvador)
fixes a rather obscure deadlock in the hugetlb fault code and
follows that fix with a series of cleanups.
"cma: factor out allocation logic from __cma_declare_contiguous_nid" (Mike Rapoport)
rationalizes and cleans up the highmem-specific code in the CMA
allocator.
"mm/migration: rework movable_ops page migration (part 1)" (David Hildenbrand)
provides cleanups and future-preparedness to the migration code.
"mm/damon: add trace events for auto-tuned monitoring intervals and DAMOS quota" (SeongJae Park)
adds some tracepoints to some DAMON auto-tuning code.
"mm/damon: fix misc bugs in DAMON modules" (SeongJae Park)
does that.
"mm/damon: misc cleanups" (SeongJae Park)
also does what it claims.
"mm: folio_pte_batch() improvements" (David Hildenbrand)
cleans up the large folio PTE batching code.
"mm/damon/vaddr: Allow interleaving in migrate_{hot,cold} actions" (SeongJae Park)
facilitates dynamic alteration of DAMON's inter-node allocation
policy.
"Remove unmap_and_put_page()" (Vishal Moola)
provides a couple of page->folio conversions.
"mm: per-node proactive reclaim" (Davidlohr Bueso)
implements a per-node control of proactive reclaim - beyond the
current memcg-based implementation.
"mm/damon: remove damon_callback" (SeongJae Park)
replaces the damon_callback interface with a more general and
powerful damon_call()+damos_walk() interface.
"mm/mremap: permit mremap() move of multiple VMAs" (Lorenzo Stoakes)
implements a number of mremap cleanups (of course) in preparation
for adding new mremap() functionality: newly permit the remapping
of multiple VMAs when the user is specifying MREMAP_FIXED. It still
excludes some specialized situations where this cannot be performed
reliably.
"drop hugetlb_free_pgd_range()" (Anthony Yznaga)
switches some sparc hugetlb code over to the generic version and
removes the thus-unneeded hugetlb_free_pgd_range().
"mm/damon/sysfs: support periodic and automated stats update" (SeongJae Park)
augments the present userspace-requested update of DAMON sysfs
monitoring files. Automatic update is now provided, along with a
tunable to control the update interval.
"Some randome fixes and cleanups to swapfile" (Kemeng Shi)
does what is claims.
"mm: introduce snapshot_page" (Luiz Capitulino and David Hildenbrand)
provides (and uses) a means by which debug-style functions can grab
a copy of a pageframe and inspect it locklessly without tripping
over the races inherent in operating on the live pageframe
directly.
"use per-vma locks for /proc/pid/maps reads" (Suren Baghdasaryan)
addresses the large contention issues which can be triggered by
reads from that procfs file. Latencies are reduced by more than
half in some situations. The series also introduces several new
selftests for the /proc/pid/maps interface.
"__folio_split() clean up" (Zi Yan)
cleans up __folio_split()!
"Optimize mprotect() for large folios" (Dev Jain)
provides some quite large (>3x) speedups to mprotect() when dealing
with large folios.
"selftests/mm: reuse FORCE_READ to replace "asm volatile("" : "+r" (XXX));" and some cleanup" (wang lian)
does some cleanup work in the selftests code.
"tools/testing: expand mremap testing" (Lorenzo Stoakes)
extends the mremap() selftest in several ways, including adding
more checking of Lorenzo's recently added "permit mremap() move of
multiple VMAs" feature.
"selftests/damon/sysfs.py: test all parameters" (SeongJae Park)
extends the DAMON sysfs interface selftest so that it tests all
possible user-requested parameters. Rather than the present minimal
subset"
* tag 'mm-stable-2025-07-30-15-25' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (370 commits)
MAINTAINERS: add missing headers to mempory policy & migration section
MAINTAINERS: add missing file to cgroup section
MAINTAINERS: add MM MISC section, add missing files to MISC and CORE
MAINTAINERS: add missing zsmalloc file
MAINTAINERS: add missing files to page alloc section
MAINTAINERS: add missing shrinker files
MAINTAINERS: move memremap.[ch] to hotplug section
MAINTAINERS: add missing mm_slot.h file THP section
MAINTAINERS: add missing interval_tree.c to memory mapping section
MAINTAINERS: add missing percpu-internal.h file to per-cpu section
mm/page_alloc: remove trace_mm_alloc_contig_migrate_range_info()
selftests/damon: introduce _common.sh to host shared function
selftests/damon/sysfs.py: test runtime reduction of DAMON parameters
selftests/damon/sysfs.py: test non-default parameters runtime commit
selftests/damon/sysfs.py: generalize DAMON context commit assertion
selftests/damon/sysfs.py: generalize monitoring attributes commit assertion
selftests/damon/sysfs.py: generalize DAMOS schemes commit assertion
selftests/damon/sysfs.py: test DAMOS filters commitment
selftests/damon/sysfs.py: generalize DAMOS scheme commit assertion
selftests/damon/sysfs.py: test DAMOS destinations commitment
...
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Let's move the removal of the page from the balloon list into the single
caller, to remove the dependency on the PG_isolated flag and clarify
locking requirements.
Note that for now, balloon_page_delete() was used on two paths:
(1) Removing a page from the balloon for deflation through
balloon_page_list_dequeue()
(2) Removing an isolated page from the balloon for migration in the
per-driver migration handlers. Isolated pages were already removed from
the balloon list during isolation.
So instead of relying on the flag, we can just distinguish both cases
directly and handle it accordingly in the caller.
We'll shuffle the operations a bit such that they logically make more
sense (e.g., remove from the list before clearing flags).
In balloon migration functions we can now move the balloon_page_finalize()
out of the balloon lock and perform the finalization just before dropping
the balloon reference.
Document that the page lock is currently required when modifying the
movability aspects of a page; hopefully we can soon decouple this from the
page lock.
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: David Hildenbrand <[email protected]>
Reviewed-by: Lorenzo Stoakes <[email protected]>
Cc: Alistair Popple <[email protected]>
Cc: Al Viro <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: Brendan Jackman <[email protected]>
Cc: Byungchul Park <[email protected]>
Cc: Chengming Zhou <[email protected]>
Cc: Christian Brauner <[email protected]>
Cc: Christophe Leroy <[email protected]>
Cc: Eugenio Pé rez <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Gregory Price <[email protected]>
Cc: Harry Yoo <[email protected]>
Cc: "Huang, Ying" <[email protected]>
Cc: Jan Kara <[email protected]>
Cc: Jason Gunthorpe <[email protected]>
Cc: Jason Wang <[email protected]>
Cc: Jerrin Shaji George <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: John Hubbard <[email protected]>
Cc: Jonathan Corbet <[email protected]>
Cc: Joshua Hahn <[email protected]>
Cc: Liam Howlett <[email protected]>
Cc: Madhavan Srinivasan <[email protected]>
Cc: Mathew Brost <[email protected]>
Cc: Matthew Wilcox (Oracle) <[email protected]>
Cc: Miaohe Lin <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: "Michael S. Tsirkin" <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Mike Rapoport <[email protected]>
Cc: Minchan Kim <[email protected]>
Cc: Naoya Horiguchi <[email protected]>
Cc: Nicholas Piggin <[email protected]>
Cc: Oscar Salvador <[email protected]>
Cc: Peter Xu <[email protected]>
Cc: Qi Zheng <[email protected]>
Cc: Rakie Kim <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Sergey Senozhatsky <[email protected]>
Cc: Shakeel Butt <[email protected]>
Cc: Suren Baghdasaryan <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Cc: Xuan Zhuo <[email protected]>
Cc: xu xin <[email protected]>
Cc: Zi Yan <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
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Now that DAX and all other reference counts to ZONE_DEVICE pages are
managed normally there is no need for the special devmap PTE/PMD/PUD page
table bits. So drop all references to these, freeing up a software
defined page table bit on architectures supporting it.
Link: https://lkml.kernel.org/r/6389398c32cc9daa3dfcaa9f79c7972525d310ce.1750323463.git-series.apopple@nvidia.com
Signed-off-by: Alistair Popple <[email protected]>
Acked-by: Will Deacon <[email protected]> # arm64
Acked-by: David Hildenbrand <[email protected]>
Suggested-by: Chunyan Zhang <[email protected]>
Reviewed-by: Björn Töpel <[email protected]>
Reviewed-by: Jason Gunthorpe <[email protected]>
Cc: Balbir Singh <[email protected]>
Cc: Björn Töpel <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Dan Williams <[email protected]>
Cc: Deepak Gupta <[email protected]>
Cc: Gerald Schaefer <[email protected]>
Cc: Inki Dae <[email protected]>
Cc: John Groves <[email protected]>
Cc: John Hubbard <[email protected]>
Cc: Lorenzo Stoakes <[email protected]>
Cc: Matthew Wilcox (Oracle) <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
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PFN_DEV no longer exists. This means no devmap PMDs or PUDs will be
created, so checking for them is redundant. Instead mappings of pages
that would have previously returned true for pXd_devmap() will return true
for pXd_trans_huge()
Link: https://lkml.kernel.org/r/31f63cc8dd518f9e2ec300681fe302eb4adf49b4.1750323463.git-series.apopple@nvidia.com
Signed-off-by: Alistair Popple <[email protected]>
Reviewed-by: Jason Gunthorpe <[email protected]>
Acked-by: David Hildenbrand <[email protected]>
Cc: Balbir Singh <[email protected]>
Cc: Björn Töpel <[email protected]>
Cc: Björn Töpel <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Chunyan Zhang <[email protected]>
Cc: Dan Williams <[email protected]>
Cc: Deepak Gupta <[email protected]>
Cc: Gerald Schaefer <[email protected]>
Cc: Inki Dae <[email protected]>
Cc: John Groves <[email protected]>
Cc: John Hubbard <[email protected]>
Cc: Lorenzo Stoakes <[email protected]>
Cc: Matthew Wilcox (Oracle) <[email protected]>
Cc: Will Deacon <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
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In future we intend to change the vm_flags_t type, so it isn't correct for
architecture and driver code to assume it is unsigned long. Correct this
assumption across the board.
Overall, this patch does not introduce any functional change.
Link: https://lkml.kernel.org/r/b6eb1894abc5555ece80bb08af5c022ef780c8bc.1750274467.git.lorenzo.stoakes@oracle.com
Signed-off-by: Lorenzo Stoakes <[email protected]>
Acked-by: Mike Rapoport (Microsoft) <[email protected]>
Acked-by: Christian Brauner <[email protected]>
Reviewed-by: Vlastimil Babka <[email protected]>
Reviewed-by: Oscar Salvador <[email protected]>
Reviewed-by: Pedro Falcato <[email protected]>
Acked-by: Catalin Marinas <[email protected]> [arm64]
Acked-by: Zi Yan <[email protected]>
Acked-by: David Hildenbrand <[email protected]>
Reviewed-by: Jarkko Sakkinen <[email protected]>
Reviewed-by: Anshuman Khandual <[email protected]>
Cc: Jann Horn <[email protected]>
Cc: Kees Cook <[email protected]>
Cc: Liam R. Howlett <[email protected]>
Cc: Jan Kara <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
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Patch series "use vm_flags_t consistently".
The VMA flags field vma->vm_flags is of type vm_flags_t. Right now this
is exactly equivalent to unsigned long, but it should not be assumed to
be.
Much code that references vma->vm_flags already correctly uses vm_flags_t,
but a fairly large chunk of code simply uses unsigned long and assumes
that the two are equivalent.
This series corrects that and has us use vm_flags_t consistently.
This series is motivated by the desire to, in a future series, adjust
vm_flags_t to be a u64 regardless of whether the kernel is 32-bit or
64-bit in order to deal with the VMA flag exhaustion issue and avoid all
the various problems that arise from it (being unable to use certain
features in 32-bit, being unable to add new flags except for 64-bit, etc.)
This is therefore a critical first step towards that goal. At any rate,
using the correct type is of value regardless.
We additionally take the opportunity to refer to VMA flags as vm_flags
where possible to make clear what we're referring to.
Overall, this series does not introduce any functional change.
This patch (of 3):
We abstract the type of the VMA flags to vm_flags_t, however in may places
it is simply assumed this is unsigned long, which is simply incorrect.
At the moment this is simply an incongruity, however in future we plan to
change this type and therefore this change is a critical requirement for
doing so.
Overall, this patch does not introduce any functional change.
[[email protected]: add missing vm_get_page_prot() instance, remove include]
Link: https://lkml.kernel.org/r/[email protected]
Link: https://lkml.kernel.org/r/[email protected]
Link: https://lkml.kernel.org/r/a12769720a2743f235643b158c4f4f0a9911daf0.1750274467.git.lorenzo.stoakes@oracle.com
Signed-off-by: Lorenzo Stoakes <[email protected]>
Acked-by: Mike Rapoport (Microsoft) <[email protected]>
Acked-by: Christian Brauner <[email protected]>
Reviewed-by: Vlastimil Babka <[email protected]>
Reviewed-by: Oscar Salvador <[email protected]>
Reviewed-by: Pedro Falcato <[email protected]>
Acked-by: Catalin Marinas <[email protected]> [arm64]
Acked-by: Zi Yan <[email protected]>
Acked-by: David Hildenbrand <[email protected]>
Reviewed-by: Anshuman Khandual <[email protected]>
Cc: Liam R. Howlett <[email protected]>
Cc: Lorenzo Stoakes <[email protected]>
Cc: Jann Horn <[email protected]>
Cc: Kees Cook <[email protected]>
Cc: Jan Kara <[email protected]>
Cc: Jarkko Sakkinen <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
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The register_one_node() function was a simple wrapper around
__register_one_node(). To simplify the code, register_one_node() has been
removed, and __register_one_node() has been renamed to
register_one_node().
Link: https://lkml.kernel.org/r/8262cd0f44eeb048a1fcd3ac8382760d7f7dea60.1748452242.git.donettom@linux.ibm.com
Signed-off-by: Donet Tom <[email protected]>
Acked-by: David Hildenbrand <[email protected]>
Cc: Mike Rapoport (Microsoft) <[email protected]>
Cc: Oscar Salvador <[email protected]>
Cc: Zi Yan <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
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git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
Pull ftrace updates from Steven Rostedt:
- Keep track of when fgraph_ops are registered or not
Keep accounting of when fgraph_ops are registered as if a fgraph_ops
is registered twice it can mess up the accounting and it will not
work as expected later. Trigger a warning if something registers it
twice as to catch bugs before they are found by things just not
working as expected.
- Make DYNAMIC_FTRACE always enabled for architectures that support it
As static ftrace (where all functions are always traced) is very
expensive and only exists to help architectures support ftrace, do
not make it an option. As soon as an architecture supports
DYNAMIC_FTRACE make it use it. This simplifies the code.
- Remove redundant config HAVE_FTRACE_MCOUNT_RECORD
The CONFIG_HAVE_FTRACE_MCOUNT was added to help simplify the
DYNAMIC_FTRACE work, but now every architecture that implements
DYNAMIC_FTRACE also has HAVE_FTRACE_MCOUNT set too, making it
redundant with the HAVE_DYNAMIC_FTRACE.
- Make pid_ptr string size match the comment
In print_graph_proc() the pid_ptr string is of size 11, but the
comment says /* sign + log10(MAX_INT) + '\0' */ which is actually 12.
* tag 'ftrace-v6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
tracing: Remove redundant config HAVE_FTRACE_MCOUNT_RECORD
ftrace: Make DYNAMIC_FTRACE always enabled for architectures that support it
fgraph: Keep track of when fgraph_ops are registered or not
fgraph: Make pid_str size match the comment
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Ftrace is tightly coupled with architecture specific code because it
requires the use of trampolines written in assembly. This means that when
a new feature or optimization is made, it must be done for all
architectures. To simplify the approach, CONFIG_HAVE_FTRACE_* configs are
added to denote which architecture has the new enhancement so that other
architectures can still function until they too have been updated.
The CONFIG_HAVE_FTRACE_MCOUNT was added to help simplify the
DYNAMIC_FTRACE work, but now every architecture that implements
DYNAMIC_FTRACE also has HAVE_FTRACE_MCOUNT set too, making it redundant
with the HAVE_DYNAMIC_FTRACE.
Remove the HAVE_FTRACE_MCOUNT config and use DYNAMIC_FTRACE directly where
applicable.
Link: https://lore.kernel.org/all/[email protected]/
Cc: Masami Hiramatsu <[email protected]>
Cc: Mathieu Desnoyers <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Linus Torvalds <[email protected]>
Link: https://lore.kernel.org/[email protected]
Signed-off-by: Steven Rostedt (Google) <[email protected]>
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git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
Pull bpf updates from Alexei Starovoitov:
- Remove usermode driver (UMD) framework (Thomas Weißschuh)
- Introduce Strongly Connected Component (SCC) in the verifier to
detect loops and refine register liveness (Eduard Zingerman)
- Allow 'void *' cast using bpf_rdonly_cast() and corresponding
'__arg_untrusted' for global function parameters (Eduard Zingerman)
- Improve precision for BPF_ADD and BPF_SUB operations in the verifier
(Harishankar Vishwanathan)
- Teach the verifier that constant pointer to a map cannot be NULL
(Ihor Solodrai)
- Introduce BPF streams for error reporting of various conditions
detected by BPF runtime (Kumar Kartikeya Dwivedi)
- Teach the verifier to insert runtime speculation barrier (lfence on
x86) to mitigate speculative execution instead of rejecting the
programs (Luis Gerhorst)
- Various improvements for 'veristat' (Mykyta Yatsenko)
- For CONFIG_DEBUG_KERNEL config warn on internal verifier errors to
improve bug detection by syzbot (Paul Chaignon)
- Support BPF private stack on arm64 (Puranjay Mohan)
- Introduce bpf_cgroup_read_xattr() kfunc to read xattr of cgroup's
node (Song Liu)
- Introduce kfuncs for read-only string opreations (Viktor Malik)
- Implement show_fdinfo() for bpf_links (Tao Chen)
- Reduce verifier's stack consumption (Yonghong Song)
- Implement mprog API for cgroup-bpf programs (Yonghong Song)
* tag 'bpf-next-6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (192 commits)
selftests/bpf: Migrate fexit_noreturns case into tracing_failure test suite
selftests/bpf: Add selftest for attaching tracing programs to functions in deny list
bpf: Add log for attaching tracing programs to functions in deny list
bpf: Show precise rejected function when attaching fexit/fmod_ret to __noreturn functions
bpf: Fix various typos in verifier.c comments
bpf: Add third round of bounds deduction
selftests/bpf: Test invariants on JSLT crossing sign
selftests/bpf: Test cross-sign 64bits range refinement
selftests/bpf: Update reg_bound range refinement logic
bpf: Improve bounds when s64 crosses sign boundary
bpf: Simplify bounds refinement from s32
selftests/bpf: Enable private stack tests for arm64
bpf, arm64: JIT support for private stack
bpf: Move bpf_jit_get_prog_name() to core.c
bpf, arm64: Fix fp initialization for exception boundary
umd: Remove usermode driver framework
bpf/preload: Don't select USERMODE_DRIVER
selftests/bpf: Fix test dynptr/test_dynptr_memset_xdp_chunks failure
selftests/bpf: Fix test dynptr/test_dynptr_copy_xdp failure
selftests/bpf: Increase xdp data size for arm64 64K page size
...
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Cross-merge BPF, perf and other fixes after downstream PRs.
It restores BPF CI to green after critical fix
commit bc4394e5e79c ("perf: Fix the throttle error of some clock events")
No conflicts.
Signed-off-by: Alexei Starovoitov <[email protected]>
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Without this, the compiler (clang21) might emit a warning under W=1
because the variable ori31_emitted is set but never used if
CONFIG_PPC_BOOK3S_64=n.
Without this patch:
$ make -j $(nproc) W=1 ARCH=powerpc SHELL=/bin/bash arch/powerpc/net
[...]
CC arch/powerpc/net/bpf_jit_comp.o
CC arch/powerpc/net/bpf_jit_comp64.o
../arch/powerpc/net/bpf_jit_comp64.c: In function 'bpf_jit_build_body':
../arch/powerpc/net/bpf_jit_comp64.c:417:28: warning: variable 'ori31_emitted' set but not used [-Wunused-but-set-variable]
417 | bool sync_emitted, ori31_emitted;
| ^~~~~~~~~~~~~
AR arch/powerpc/net/built-in.a
With this patch:
[...]
CC arch/powerpc/net/bpf_jit_comp.o
CC arch/powerpc/net/bpf_jit_comp64.o
AR arch/powerpc/net/built-in.a
Fixes: dff883d9e93a ("bpf, arm64, powerpc: Change nospec to include v1 barrier")
Reported-by: kernel test robot <[email protected]>
Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/
Signed-off-by: Luis Gerhorst <[email protected]>
Reviewed-by: Christophe Leroy <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Alexei Starovoitov <[email protected]>
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This changes the semantics of BPF_NOSPEC (previously a v4-only barrier)
to always emit a speculation barrier that works against both Spectre v1
AND v4. If mitigation is not needed on an architecture, the backend
should set bpf_jit_bypass_spec_v4/v1().
As of now, this commit only has the user-visible implication that unpriv
BPF's performance on PowerPC is reduced. This is the case because we
have to emit additional v1 barrier instructions for BPF_NOSPEC now.
This commit is required for a future commit to allow us to rely on
BPF_NOSPEC for Spectre v1 mitigation. As of this commit, the feature
that nospec acts as a v1 barrier is unused.
Commit f5e81d111750 ("bpf: Introduce BPF nospec instruction for
mitigating Spectre v4") noted that mitigation instructions for v1 and v4
might be different on some archs. While this would potentially offer
improved performance on PowerPC, it was dismissed after the following
considerations:
* Only having one barrier simplifies the verifier and allows us to
easily rely on v4-induced barriers for reducing the complexity of
v1-induced speculative path verification.
* For the architectures that implemented BPF_NOSPEC, only PowerPC has
distinct instructions for v1 and v4. Even there, some insns may be
shared between the barriers for v1 and v4 (e.g., 'ori 31,31,0' and
'sync'). If this is still found to impact performance in an
unacceptable way, BPF_NOSPEC can be split into BPF_NOSPEC_V1 and
BPF_NOSPEC_V4 later. As an optimization, we can already skip v1/v4
insns from being emitted for PowerPC with this setup if
bypass_spec_v1/v4 is set.
Vulnerability-status for BPF_NOSPEC-based Spectre mitigations (v4 as of
this commit, v1 in the future) is therefore:
* x86 (32-bit and 64-bit), ARM64, and PowerPC (64-bit): Mitigated - This
patch implements BPF_NOSPEC for these architectures. The previous
v4-only version was supported since commit f5e81d111750 ("bpf:
Introduce BPF nospec instruction for mitigating Spectre v4") and
commit b7540d625094 ("powerpc/bpf: Emit stf barrier instruction
sequences for BPF_NOSPEC").
* LoongArch: Not Vulnerable - Commit a6f6a95f2580 ("LoongArch, bpf: Fix
jit to skip speculation barrier opcode") is the only other past commit
related to BPF_NOSPEC and indicates that the insn is not required
there.
* MIPS: Vulnerable (if unprivileged BPF is enabled) -
Commit a6f6a95f2580 ("LoongArch, bpf: Fix jit to skip speculation
barrier opcode") indicates that it is not vulnerable, but this
contradicts the kernel and Debian documentation. Therefore, I assume
that there exist vulnerable MIPS CPUs (but maybe not from Loongson?).
In the future, BPF_NOSPEC could be implemented for MIPS based on the
GCC speculation_barrier [1]. For now, we rely on unprivileged BPF
being disabled by default.
* Other: Unknown - To the best of my knowledge there is no definitive
information available that indicates that any other arch is
vulnerable. They are therefore left untouched (BPF_NOSPEC is not
implemented, but bypass_spec_v1/v4 is also not set).
I did the following testing to ensure the insn encoding is correct:
* ARM64:
* 'dsb nsh; isb' was successfully tested with the BPF CI in [2]
* 'sb' locally using QEMU v7.2.15 -cpu max (emitted sb insn is
executed for example with './test_progs -t verifier_array_access')
* PowerPC: The following configs were tested locally with ppc64le QEMU
v8.2 '-machine pseries -cpu POWER9':
* STF_BARRIER_EIEIO + CONFIG_PPC_BOOK32_64
* STF_BARRIER_SYNC_ORI (forced on) + CONFIG_PPC_BOOK32_64
* STF_BARRIER_FALLBACK (forced on) + CONFIG_PPC_BOOK32_64
* CONFIG_PPC_E500 (forced on) + STF_BARRIER_EIEIO
* CONFIG_PPC_E500 (forced on) + STF_BARRIER_SYNC_ORI (forced on)
* CONFIG_PPC_E500 (forced on) + STF_BARRIER_FALLBACK (forced on)
* CONFIG_PPC_E500 (forced on) + STF_BARRIER_NONE (forced on)
Most of those cobinations should not occur in practice, but I was not
able to get an PPC e6500 rootfs (for testing PPC_E500 without forcing
it on). In any case, this should ensure that there are no unexpected
conflicts between the insns when combined like this. Individual v1/v4
barriers were already emitted elsewhere.
Hari's ack is for the PowerPC changes only.
[1] https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=29b74545531f6afbee9fc38c267524326dbfbedf
("MIPS: Add speculation_barrier support")
[2] https://github.com/kernel-patches/bpf/pull/8576
Signed-off-by: Luis Gerhorst <[email protected]>
Acked-by: Hari Bathini <[email protected]>
Cc: Henriette Herzog <[email protected]>
Cc: Maximilian Ott <[email protected]>
Cc: Milan Stephan <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Alexei Starovoitov <[email protected]>
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JITs can set bpf_jit_bypass_spec_v1/v4() if they want the verifier to
skip analysis/patching for the respective vulnerability. For v4, this
will reduce the number of barriers the verifier inserts. For v1, it
allows more programs to be accepted.
The primary motivation for this is to not regress unpriv BPF's
performance on ARM64 in a future commit where BPF_NOSPEC is also used
against Spectre v1.
This has the user-visible change that v1-induced rejections on
non-vulnerable PowerPC CPUs are avoided.
For now, this does not change the semantics of BPF_NOSPEC. It is still a
v4-only barrier and must not be implemented if bypass_spec_v4 is always
true for the arch. Changing it to a v1 AND v4-barrier is done in a
future commit.
As an alternative to bypass_spec_v1/v4, one could introduce NOSPEC_V1
AND NOSPEC_V4 instructions and allow backends to skip their lowering as
suggested by commit f5e81d111750 ("bpf: Introduce BPF nospec instruction
for mitigating Spectre v4"). Adding bpf_jit_bypass_spec_v1/v4() was
found to be preferable for the following reason:
* bypass_spec_v1/v4 benefits non-vulnerable CPUs: Always performing the
same analysis (not taking into account whether the current CPU is
vulnerable), needlessly restricts users of CPUs that are not
vulnerable. The only use case for this would be portability-testing,
but this can later be added easily when needed by allowing users to
force bypass_spec_v1/v4 to false.
* Portability is still acceptable: Directly disabling the analysis
instead of skipping the lowering of BPF_NOSPEC(_V1/V4) might allow
programs on non-vulnerable CPUs to be accepted while the program will
be rejected on vulnerable CPUs. With the fallback to speculation
barriers for Spectre v1 implemented in a future commit, this will only
affect programs that do variable stack-accesses or are very complex.
For PowerPC, the SEC_FTR checking in bpf_jit_bypass_spec_v4() is based
on the check that was previously located in the BPF_NOSPEC case.
For LoongArch, it would likely be safe to set both
bpf_jit_bypass_spec_v1() and _v4() according to
commit a6f6a95f2580 ("LoongArch, bpf: Fix jit to skip speculation
barrier opcode"). This is omitted here as I am unable to do any testing
for LoongArch.
Hari's ack concerns the PowerPC part only.
Signed-off-by: Luis Gerhorst <[email protected]>
Acked-by: Hari Bathini <[email protected]>
Cc: Henriette Herzog <[email protected]>
Cc: Maximilian Ott <[email protected]>
Cc: Milan Stephan <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Alexei Starovoitov <[email protected]>
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git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
Pull networking updates from Jakub Kicinski:
"Core & protocols:
- Wrap datapath globals into net_aligned_data, to avoid false sharing
- Preserve MSG_ZEROCOPY in forwarding (e.g. out of a container)
- Add SO_INQ and SCM_INQ support to AF_UNIX
- Add SIOCINQ support to AF_VSOCK
- Add TCP_MAXSEG sockopt to MPTCP
- Add IPv6 force_forwarding sysctl to enable forwarding per interface
- Make TCP validation of whether packet fully fits in the receive
window and the rcv_buf more strict. With increased use of HW
aggregation a single "packet" can be multiple 100s of kB
- Add MSG_MORE flag to optimize large TCP transmissions via sockmap,
improves latency up to 33% for sockmap users
- Convert TCP send queue handling from tasklet to BH workque
- Improve BPF iteration over TCP sockets to see each socket exactly
once
- Remove obsolete and unused TCP RFC3517/RFC6675 loss recovery code
- Support enabling kernel threads for NAPI processing on per-NAPI
instance basis rather than a whole device. Fully stop the kernel
NAPI thread when threaded NAPI gets disabled. Previously thread
would stick around until ifdown due to tricky synchronization
- Allow multicast routing to take effect on locally-generated packets
- Add output interface argument for End.X in segment routing
- MCTP: add support for gateway routing, improve bind() handling
- Don't require rtnl_lock when fetching an IPv6 neighbor over Netlink
- Add a new neighbor flag ("extern_valid"), which cedes refresh
responsibilities to userspace. This is needed for EVPN multi-homing
where a neighbor entry for a multi-homed host needs to be synced
across all the VTEPs among which the host is multi-homed
- Support NUD_PERMANENT for proxy neighbor entries
- Add a new queuing discipline for IETF RFC9332 DualQ Coupled AQM
- Add sequence numbers to netconsole messages. Unregister
netconsole's console when all net targets are removed. Code
refactoring. Add a number of selftests
- Align IPSec inbound SA lookup to RFC 4301. Only SPI and protocol
should be used for an inbound SA lookup
- Support inspecting ref_tracker state via DebugFS
- Don't force bonding advertisement frames tx to ~333 ms boundaries.
Add broadcast_neighbor option to send ARP/ND on all bonded links
- Allow providing upcall pid for the 'execute' command in openvswitch
- Remove DCCP support from Netfilter's conntrack
- Disallow multiple packet duplications in the queuing layer
- Prevent use of deprecated iptables code on PREEMPT_RT
Driver API:
- Support RSS and hashing configuration over ethtool Netlink
- Add dedicated ethtool callbacks for getting and setting hashing
fields
- Add support for power budget evaluation strategy in PSE /
Power-over-Ethernet. Generate Netlink events for overcurrent etc
- Support DPLL phase offset monitoring across all device inputs.
Support providing clock reference and SYNC over separate DPLL
inputs
- Support traffic classes in devlink rate API for bandwidth
management
- Remove rtnl_lock dependency from UDP tunnel port configuration
Device drivers:
- Add a new Broadcom driver for 800G Ethernet (bnge)
- Add a standalone driver for Microchip ZL3073x DPLL
- Remove IBM's NETIUCV device driver
- Ethernet high-speed NICs:
- Broadcom (bnxt):
- support zero-copy Tx of DMABUF memory
- take page size into account for page pool recycling rings
- Intel (100G, ice, idpf):
- idpf: XDP and AF_XDP support preparations
- idpf: add flow steering
- add link_down_events statistic
- clean up the TSPLL code
- preparations for live VM migration
- nVidia/Mellanox:
- support zero-copy Rx/Tx interfaces (DMABUF and io_uring)
- optimize context memory usage for matchers
- expose serial numbers in devlink info
- support PCIe congestion metrics
- Meta (fbnic):
- add 25G, 50G, and 100G link modes to phylink
- support dumping FW logs
- Marvell/Cavium:
- support for CN20K generation of the Octeon chips
- Amazon:
- add HW clock (without timestamping, just hypervisor time access)
- Ethernet virtual:
- VirtIO net:
- support segmentation of UDP-tunnel-encapsulated packets
- Google (gve):
- support packet timestamping and clock synchronization
- Microsoft vNIC:
- add handler for device-originated servicing events
- allow dynamic MSI-X vector allocation
- support Tx bandwidth clamping
- Ethernet NICs consumer, and embedded:
- AMD:
- amd-xgbe: hardware timestamping and PTP clock support
- Broadcom integrated MACs (bcmgenet, bcmasp):
- use napi_complete_done() return value to support NAPI polling
- add support for re-starting auto-negotiation
- Broadcom switches (b53):
- support BCM5325 switches
- add bcm63xx EPHY power control
- Synopsys (stmmac):
- lots of code refactoring and cleanups
- TI:
- icssg-prueth: read firmware-names from device tree
- icssg: PRP offload support
- Microchip:
- lan78xx: convert to PHYLINK for improved PHY and MAC management
- ksz: add KSZ8463 switch support
- Intel:
- support similar queue priority scheme in multi-queue and
time-sensitive networking (taprio)
- support packet pre-emption in both
- RealTek (r8169):
- enable EEE at 5Gbps on RTL8126
- Airoha:
- add PPPoE offload support
- MDIO bus controller for Airoha AN7583
- Ethernet PHYs:
- support for the IPQ5018 internal GE PHY
- micrel KSZ9477 switch-integrated PHYs:
- add MDI/MDI-X control support
- add RX error counters
- add cable test support
- add Signal Quality Indicator (SQI) reporting
- dp83tg720: improve reset handling and reduce link recovery time
- support bcm54811 (and its MII-Lite interface type)
- air_en8811h: support resume/suspend
- support PHY counters for QCA807x and QCA808x
- support WoL for QCA807x
- CAN drivers:
- rcar_canfd: support for Transceiver Delay Compensation
- kvaser: report FW versions via devlink dev info
- WiFi:
- extended regulatory info support (6 GHz)
- add statistics and beacon monitor for Multi-Link Operation (MLO)
- support S1G aggregation, improve S1G support
- add Radio Measurement action fields
- support per-radio RTS threshold
- some work around how FIPS affects wifi, which was wrong (RC4 is
used by TKIP, not only WEP)
- improvements for unsolicited probe response handling
- WiFi drivers:
- RealTek (rtw88):
- IBSS mode for SDIO devices
- RealTek (rtw89):
- BT coexistence for MLO/WiFi7
- concurrent station + P2P support
- support for USB devices RTL8851BU/RTL8852BU
- Intel (iwlwifi):
- use embedded PNVM in (to be released) FW images to fix
compatibility issues
- many cleanups (unused FW APIs, PCIe code, WoWLAN)
- some FIPS interoperability
- MediaTek (mt76):
- firmware recovery improvements
- more MLO work
- Qualcomm/Atheros (ath12k):
- fix scan on multi-radio devices
- more EHT/Wi-Fi 7 features
- encapsulation/decapsulation offload
- Broadcom (brcm80211):
- support SDIO 43751 device
- Bluetooth:
- hci_event: add support for handling LE BIG Sync Lost event
- ISO: add socket option to report packet seqnum via CMSG
- ISO: support SCM_TIMESTAMPING for ISO TS
- Bluetooth drivers:
- intel_pcie: support Function Level Reset
- nxpuart: add support for 4M baudrate
- nxpuart: implement powerup sequence, reset, FW dump, and FW loading"
* tag 'net-next-6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1742 commits)
dpll: zl3073x: Fix build failure
selftests: bpf: fix legacy netfilter options
ipv6: annotate data-races around rt->fib6_nsiblings
ipv6: fix possible infinite loop in fib6_info_uses_dev()
ipv6: prevent infinite loop in rt6_nlmsg_size()
ipv6: add a retry logic in net6_rt_notify()
vrf: Drop existing dst reference in vrf_ip6_input_dst
net/sched: taprio: align entry index attr validation with mqprio
net: fsl_pq_mdio: use dev_err_probe
selftests: rtnetlink.sh: remove esp4_offload after test
vsock: remove unnecessary null check in vsock_getname()
igb: xsk: solve negative overflow of nb_pkts in zerocopy mode
stmmac: xsk: fix negative overflow of budget in zerocopy mode
dt-bindings: ieee802154: Convert at86rf230.txt yaml format
net: dsa: microchip: Disable PTP function of KSZ8463
net: dsa: microchip: Setup fiber ports for KSZ8463
net: dsa: microchip: Write switch MAC address differently for KSZ8463
net: dsa: microchip: Use different registers for KSZ8463
net: dsa: microchip: Add KSZ8463 switch support to KSZ DSA driver
dt-bindings: net: dsa: microchip: Add KSZ8463 switch support
...
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This patch enables batched RX buffer replenishment in ibmveth by
using the new firmware-supported h_add_logical_lan_buffers() hcall
to submit up to 8 RX buffers in a single call, instead of repeatedly
calling the single-buffer h_add_logical_lan_buffer() hcall.
During the probe, with the patch, the driver queries ILLAN attributes
to detect IBMVETH_ILLAN_RX_MULTI_BUFF_SUPPORT bit. If the attribute is
present, rx_buffers_per_hcall is set to 8, enabling batched replenishment.
Otherwise, it defaults to 1, preserving the original upstream behavior
with no change in code flow for unsupported systems.
The core rx replenish logic remains the same. But when batching
is enabled, the driver aggregates up to 8 fully prepared descriptors
into a single h_add_logical_lan_buffers() hypercall. If any allocation
or DMA mapping fails while preparing a batch, only the successfully
prepared buffers are submitted, and the remaining are deferred for
the next replenish cycle.
If at runtime the firmware stops accepting the batched hcall—e,g,
after a Live Partition Migration (LPM) to a host that does not
support h_add_logical_lan_buffers(), the hypercall returns H_FUNCTION.
In that case, the driver transparently disables batching, resets
rx_buffers_per_hcall to 1, and falls back to the single-buffer hcall
in next future replenishments to take care of these and future buffers.
Test were done on systems with firmware that both supports and
does not support the new h_add_logical_lan_buffers hcall.
On supported firmware, this reduces hypercall overhead significantly
over multiple buffers. SAR measurements showed about a 15% improvement
in packet processing rate under moderate RX load, with heavier traffic
seeing gains more than 30%
Signed-off-by: Mingming Cao <[email protected]>
Reviewed-by: Brian King <[email protected]>
Reviewed-by: Haren Myneni <[email protected]>
Reviewed-by: Dave Marquardt <[email protected]>
Reviewed-by: Simon Horman <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Paolo Abeni <[email protected]>
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The DCCP socket family has now been removed from this tree, see:
8bb3212be4b4 ("Merge branch 'net-retire-dccp-socket'")
Remove connection tracking and NAT support for this protocol, this
should not pose a problem because no DCCP traffic is expected to be seen
on the wire.
As for the code for matching on dccp header for iptables and nftables,
mark it as deprecated and keep it in place. Ruleset restoration is an
atomic operation. Without dccp matching support, an astray match on dccp
could break this operation leaving your computer with no policy in
place, so let's follow a more conservative approach for matches.
Add CONFIG_NFT_EXTHDR_DCCP which is set to 'n' by default to deprecate
dccp extension support. Similarly, label CONFIG_NETFILTER_XT_MATCH_DCCP
as deprecated too and also set it to 'n' by default.
Code to match on DCCP protocol from ebtables also remains in place, this
is just a few checks on IPPROTO_DCCP from _check() path which is
exercised when ruleset is loaded. There is another use of IPPROTO_DCCP
from the _check() path in the iptables multiport match. Another check
for IPPROTO_DCCP from the packet in the reject target is also removed.
So let's schedule removal of the dccp matching for a second stage, this
should not interfer with the dccp retirement since this is only matching
on the dccp header.
Cc: "David S. Miller" <[email protected]>
Cc: Eric Dumazet <[email protected]>
Cc: Jakub Kicinski <[email protected]>
Cc: Paolo Abeni <[email protected]>
Cc: Kuniyuki Iwashima <[email protected]>
Reviewed-by: Simon Horman <[email protected]>
Signed-off-by: Pablo Neira Ayuso <[email protected]>
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git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc updates from Madhavan Srinivasan:
- CONFIG_HZ changes to move the base_slice from 10ms to 1ms
- Patchset to move some of the mutex handling to lock guard
- Expose secvars relevant to the key management mode
- Misc cleanups and fixes
Thanks to Ankit Chauhan, Christophe Leroy, Donet Tom, Gautam Menghani,
Haren Myneni, Johan Korsnes, Madadi Vineeth Reddy, Paul Mackerras,
Shrikanth Hegde, Srish Srinivasan, Thomas Fourier, Thomas Huth, Thomas
Weißschuh, Souradeep, Amit Machhiwal, R Nageswara Sastry, Venkat Rao
Bagalkote, Andrew Donnellan, Greg Kroah-Hartman, Mimi Zohar, Mukesh
Kumar Chaurasiya, Nayna Jain, Ritesh Harjani (IBM), Sourabh Jain, Srikar
Dronamraju, Stefan Berger, Tyrel Datwyler, and Kowshik Jois.
* tag 'powerpc-6.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (23 commits)
arch/powerpc: Remove .interp section in vmlinux
powerpc: Drop GPL boilerplate text with obsolete FSF address
powerpc: Don't use %pK through printk
arch: powerpc: defconfig: Drop obsolete CONFIG_NET_CLS_TCINDEX
misc: ocxl: Replace scnprintf() with sysfs_emit() in sysfs show functions
integrity/platform_certs: Allow loading of keys in the static key management mode
powerpc/secvar: Expose secvars relevant to the key management mode
powerpc/pseries: Correct secvar format representation for static key management
(powerpc/512) Fix possible `dma_unmap_single()` on uninitialized pointer
powerpc: floppy: Add missing checks after DMA map
book3s64/radix : Optimize vmemmap start alignment
book3s64/radix : Handle error conditions properly in radix_vmemmap_populate
powerpc/pseries/dlpar: Search DRC index from ibm,drc-indexes for IO add
KVM: PPC: Book3S HV: Add H_VIRT mapping for tracing exits
powerpc: sysdev: use lock guard for mutex
powerpc: powernv: ocxl: use lock guard for mutex
powerpc: book3s: vas: use lock guard for mutex
powerpc: fadump: use lock guard for mutex
powerpc: rtas: use lock guard for mutex
powerpc: eeh: use lock guard for mutex
...
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When building with CONFIG_RELOCATABLE, there is a .interp section
which contains the name of the expected ELF interpreter:
Contents of section .interp:
c0000000021c1bac 2f757372 2f6c6962 2f6c642e 736f2e31 /usr/lib/ld.so.1
c0000000021c1bbc 00 .
That information is useless and even likely wrong. Remove it.
Link: https://github.com/linuxppc/issues/issues/434
Signed-off-by: Christophe Leroy <[email protected]>
Acked-by: Segher Boessenkool <[email protected]>
Signed-off-by: Madhavan Srinivasan <[email protected]>
Link: https://patch.msgid.link/eeaf8fd6628a75d19872ab31cf7e7179e2baef5e.1751366959.git.christophe.leroy@csgroup.eu
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The FSF does not reside in the Franklin street anymore, so we should not
request the people to write to this address. Fortunately, these header
files already contain a proper SPDX license identifier, so it should be
fine to simply drop all of this license boilerplate code here.
Suggested-by: Greg Kroah-Hartman <[email protected]>
Signed-off-by: Thomas Huth <[email protected]>
Reviewed-by: Greg Kroah-Hartman <[email protected]>
Signed-off-by: Madhavan Srinivasan <[email protected]>
Link: https://patch.msgid.link/[email protected]
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In the past %pK was preferable to %p as it would not leak raw pointer
values into the kernel log.
Since commit ad67b74d2469 ("printk: hash addresses printed with %p")
the regular %p has been improved to avoid this issue.
Furthermore, restricted pointers ("%pK") were never meant to be used
through printk(). They can still unintentionally leak raw pointers or
acquire sleeping locks in atomic contexts.
Switch to the regular pointer formatting which is safer and
easier to reason about.
Link: https://lore.kernel.org/lkml/20250113171731-dc10e3c1-da64-4af0-b767-7c7070468023@linutronix.de/
Signed-off-by: Thomas Weißschuh <[email protected]>
Reviewed-by: Christophe Leroy <[email protected]>
Signed-off-by: Madhavan Srinivasan <[email protected]>
Link: https://patch.msgid.link/20250718-restricted-pointers-powerpc-v2-1-fd7bddd809f3@linutronix.de
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This option was removed from the Kconfig in commit
8c710f75256b ("net/sched: Retire tcindex classifier") but it was not
removed from the defconfigs.
Fixes: 8c710f75256b ("net/sched: Retire tcindex classifier")
Signed-off-by: Johan Korsnes <[email protected]>
Reviewed-by: Christophe Leroy <[email protected]>
Signed-off-by: Madhavan Srinivasan <[email protected]>
Link: https://patch.msgid.link/[email protected]
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The PLPKS enabled PowerVM LPAR sysfs exposes all of the secure boot
secvars irrespective of the key management mode.
The PowerVM LPAR supports static and dynamic key management for secure
boot. The key management option can be updated in the management
console. The secvars PK, trustedcadb, and moduledb can be consumed both
in the static and dynamic key management modes for the loading of signed
third-party kernel modules. However, other secvars i.e. KEK, grubdb,
grubdbx, sbat, db and dbx, which are used to verify the grub and kernel
images, are consumed only in the dynamic key management mode.
Expose only PK, trustedcadb, and moduledb in the static key management
mode.
Co-developed-by: Souradeep <[email protected]>
Signed-off-by: Souradeep <[email protected]>
Signed-off-by: Srish Srinivasan <[email protected]>
Tested-by: R Nageswara Sastry <[email protected]>
Reviewed-by: Mimi Zohar <[email protected]>
Reviewed-by: Stefan Berger <[email protected]>
Reviewed-by: Nayna Jain <[email protected]>
Reviewed-by: Andrew Donnellan <[email protected]>
Signed-off-by: Madhavan Srinivasan <[email protected]>
Link: https://patch.msgid.link/[email protected]
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On a PLPKS enabled PowerVM LPAR, the secvar format property for static
key management is misrepresented as "ibm,plpks-sb-unknown", creating
reason for confusion.
Static key management mode uses fixed, built-in keys. Dynamic key
management mode allows keys to be updated in production to handle
security updates without firmware rebuilds.
Define a function named plpks_get_sb_keymgmt_mode() to retrieve the
key management mode based on the existence of the SB_VERSION property
in the firmware.
Set the secvar format property to either "ibm,plpks-sb-v<version>" or
"ibm,plpks-sb-v0" based on the key management mode, and return the
length of the secvar format property.
Co-developed-by: Souradeep <[email protected]>
Signed-off-by: Souradeep <[email protected]>
Signed-off-by: Srish Srinivasan <[email protected]>
Tested-by: R Nageswara Sastry <[email protected]>
Reviewed-by: Mimi Zohar <[email protected]>
Reviewed-by: Stefan Berger <[email protected]>
Reviewed-by: Nayna Jain <[email protected]>
Reviewed-by: Andrew Donnellan <[email protected]>
Signed-off-by: Madhavan Srinivasan <[email protected]>
Link: https://patch.msgid.link/[email protected]
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If the device configuration fails (if `dma_dev->device_config()`),
`sg_dma_address(&sg)` is not initialized and the jump to `err_dma_prep`
leads to calling `dma_unmap_single()` on `sg_dma_address(&sg)`.
Signed-off-by: Thomas Fourier <[email protected]>
Reviewed-by: Christophe Leroy <[email protected]>
Signed-off-by: Madhavan Srinivasan <[email protected]>
Link: https://patch.msgid.link/[email protected]
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The DMA map functions can fail and should be tested for errors.
Signed-off-by: Thomas Fourier <[email protected]>
Reviewed-by: Christophe Leroy <[email protected]>
Signed-off-by: Madhavan Srinivasan <[email protected]>
Link: https://patch.msgid.link/[email protected]
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If we always align the vmemmap start to PAGE_SIZE, there is a
chance that we may end up allocating page-sized vmemmap backing
pages in RAM in the altmap not present case, because a PAGE_SIZE
aligned address is not PMD_SIZE-aligned.
In this patch, we are aligning the vmemmap start address to
PMD_SIZE if altmap is not present. This ensures that a PMD_SIZE
page is always allocated for the vmemmap mapping if altmap is
not present.
If altmap is present, Make sure we align the start vmemmap addr to
PAGE_SIZE so that we calculate the correct start_pfn in altmap
boundary check to decide whether we should use altmap or RAM based
backing memory allocation. Also the address need to be aligned for
set_pte operation. If the start addr is already PMD_SIZE aligned
and with in the altmap boundary then we will try to use a pmd size
altmap mapping else we go for page size mapping.
So if altmap is present, we try to use the maximum number of
altmap pages; otherwise, we allocate a PMD_SIZE RAM page.
Signed-off-by: Donet Tom <[email protected]>
Signed-off-by: Madhavan Srinivasan <[email protected]>
Link: https://patch.msgid.link/895c4afd912c85d344a2065e348fac90529ed48f.1750593372.git.donettom@linux.ibm.com
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Error conditions are not handled properly if altmap is not present
and PMD_SIZE vmemmap_alloc_block_buf fails.
In this patch, if vmemmap_alloc_block_buf fails in the non-altmap
case, we will fall back to the base mapping.
Reviewed-by: Ritesh Harjani (IBM) <[email protected]>
Signed-off-by: Donet Tom <[email protected]>
Signed-off-by: Madhavan Srinivasan <[email protected]>
Link: https://patch.msgid.link/7f95fe91c827a2fb76367a58dbea724e811fb152.1750593372.git.donettom@linux.ibm.com
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IO hotplug add event is handled in the user space with drmgr tool.
After the device is enabled, the user space uses /sys/kernel/dlpar
interface with “dt add index <drc_index>” to update the device tree.
The kernel interface (dlpar_hp_dt_add()) finds the parent node for
the specified ‘drc_index’ from ibm,drc-info property. The recent FW
provides this property from 2017 onwards. But KVM guest code in
some releases is still using the older SLOF firmware which has
ibm,drc-indexes property instead of ibm,drc-info.
If the ibm,drc-info is not available, this patch adds changes to
search ‘drc_index’ from the indexes array in ibm,drc-indexes
property to support old FW.
Fixes: 02b98ff44a57 ("powerpc/pseries/dlpar: Add device tree nodes for DLPAR IO add")
Reported-by: Kowshik Jois <[email protected]>
Signed-off-by: Haren Myneni <[email protected]>
Tested-by: Amit Machhiwal <[email protected]>
Reviewed-by: Tyrel Datwyler <[email protected]>
Signed-off-by: Madhavan Srinivasan <[email protected]>
Link: https://patch.msgid.link/[email protected]
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The macro kvm_trace_symbol_exit is used for providing the mappings
for the trap vectors and their names. Add mapping for H_VIRT so that
trap reason is displayed as string instead of a vector number when using
the kvm_guest_exit tracepoint.
Signed-off-by: Gautam Menghani <[email protected]>
Reviewed-by: Ritesh Harjani (IBM) <[email protected]>
Signed-off-by: Madhavan Srinivasan <[email protected]>
Link: https://patch.msgid.link/[email protected]
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use guard(mutex) for scope based resource management of mutex
This would make the code simpler and easier to maintain.
More details on lock guards can be found at
https://lore.kernel.org/all/[email protected]/T/#u
Reviewed-by: Srikar Dronamraju <[email protected]>
Signed-off-by: Shrikanth Hegde <[email protected]>
Tested-by: Venkat Rao Bagalkote <[email protected]>
Signed-off-by: Madhavan Srinivasan <[email protected]>
Link: https://patch.msgid.link/[email protected]
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use guard(mutex) for scope based resource management of mutex.
This would make the code simpler and easier to maintain.
More details on lock guards can be found at
https://lore.kernel.org/all/[email protected]/T/#u
Reviewed-by: Srikar Dronamraju <[email protected]>
Acked-by: Andrew Donnellan <[email protected]>
Signed-off-by: Shrikanth Hegde <[email protected]>
Tested-by: Venkat Rao Bagalkote <[email protected]>
Signed-off-by: Madhavan Srinivasan <[email protected]>
Link: https://patch.msgid.link/[email protected]
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use lock guards for scope based resource management of mutex.
This would make the code simpler and easier to maintain.
More details on lock guards can be found at
https://lore.kernel.org/all/[email protected]/T/#u
This shows the use of both guard and scoped_guard
Reviewed-by: Srikar Dronamraju <[email protected]>
Signed-off-by: Shrikanth Hegde <[email protected]>
Tested-by: Venkat Rao Bagalkote <[email protected]>
Signed-off-by: Madhavan Srinivasan <[email protected]>
Link: https://patch.msgid.link/[email protected]
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