The "adv,force-bt656-4" property causes several dt-schema warnings
because 'adv' is not a valid vendor prefix defined in
vendor-prefixes.yaml:
'adv,force-bt656-4' does not match any of the regexes: '^#.*'...
The correct vendor prefix for Analog Devices is 'adi', so change
the property name to 'adi,force-bt656-4'.
Keep the old property for old DTB compatibility and mark it as deprecated.
Signed-off-by: Fabio Estevam <festevam@denx.de>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Fixes broken output due to different input/output alignment in loopback
mode when the (last) input device is closed. Instead of on device close,
do the alignment synchronisation when starting the stream (and clear
it when streaming is stopped).
Signed-off-by: Martin Tůma <martin.tuma@digiteqautomotive.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
The old hans.verkuil@cisco.com email address was discontinued years ago.
Replace it with the correct hansverk@cisco.com email.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Clearly state that the V4L2_CID_MIN_BUFFERS_FOR_OUTPUT and
V4L2_CID_MIN_BUFFERS_FOR_CAPTURE controls are required for
stateful codecs.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Stateful codecs must support the V4L2_CID_MIN_BUFFERS_FOR_OUTPUT
and V4L2_CID_MIN_BUFFERS_FOR_CAPTURE controls. The vicodec driver
was missing support for these controls. Add them.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com>
GCC and Clang both implement stack protector support based on Thread Local
Storage (TLS) variables, and this is used in the kernel to implement per-task
stack cookies, by copying a task's stack cookie into a per-CPU variable every
time it is scheduled in.
Both now also implement -mstack-protector-guard-symbol=, which permits the TLS
variable to be specified directly. This is useful because it will allow to
move away from using a fixed offset of 40 bytes into the per-CPU area on
x86_64, which requires a lot of special handling in the per-CPU code and the
runtime relocation code.
However, while GCC is rather lax in its implementation of this command line
option, Clang actually requires that the provided symbol name refers to a TLS
variable (i.e., one declared with __thread), although it also permits the
variable to be undeclared entirely, in which case it will use an implicit
declaration of the right type.
The upshot of this is that Clang will emit the correct references to the stack
cookie variable in most cases, e.g.,
10d: 64 a1 00 00 00 00 mov %fs:0x0,%eax
10f: R_386_32 __stack_chk_guard
However, if a non-TLS definition of the symbol in question is visible in the
same compilation unit (which amounts to the whole of vmlinux if LTO is
enabled), it will drop the per-CPU prefix and emit a load from a bogus
address.
Work around this by using a symbol name that never occurs in C code, and emit
it as an alias in the linker script.
Fixes: 3fb0fdb3bb ("x86/stackprotector/32: Make the canary into a regular percpu variable")
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Brian Gerst <brgerst@gmail.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Tested-by: Nathan Chancellor <nathan@kernel.org>
Cc: stable@vger.kernel.org
Link: https://github.com/ClangBuiltLinux/linux/issues/1854
Link: https://lore.kernel.org/r/20241105155801.1779119-2-brgerst@gmail.com
Use of both pcim_iomap_regions() and pcim_iomap_table() APIs are
deprecated. Hence, switch to pcim_iomap_region() API which handles both the
request and map of the MHI BAR region.
Cc: Loic Poulain <loic.poulain@linaro.org>
Reviewed-by: Mayank Rana <quic_mrana@quicinc.com>
Link: https://lore.kernel.org/r/20241004023351.6946-1-manivannan.sadhasivam@linaro.org
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Each of the __field() macros were triggering sparse warnings similar to:
trace.h:87:1: sparse: sparse: cast to restricted __le64
trace.h:87:1: sparse: sparse: restricted __le64 degrades to integer
trace.h:87:1: sparse: sparse: restricted __le64 degrades to integer
Change each little endian type to its similarly sized native integer.
Convert inputs into native endian.
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202402071859.8qMhgJEQ-lkp@intel.com/
Fixes: ceeb64f41f ("bus: mhi: host: Add tracing support")
Signed-off-by: Carl Vanderlip <quic_carlv@quicinc.com>
Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Reviewed-by: Mayank Rana <quic_mrana@quicinc.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20241004170321.4047492-1-quic_carlv@quicinc.com
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reorganize the text to mention file descriptors as early as possible.
Also mention capabilities early as they are a central part of KVM's
API.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-ID: <20241023124507.280382-5-pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Hide KVM's pt_mode module param behind CONFIG_BROKEN, i.e. disable support
for virtualizing Intel PT via guest/host mode unless BROKEN=y. There are
myriad bugs in the implementation, some of which are fatal to the guest,
and others which put the stability and health of the host at risk.
For guest fatalities, the most glaring issue is that KVM fails to ensure
tracing is disabled, and *stays* disabled prior to VM-Enter, which is
necessary as hardware disallows loading (the guest's) RTIT_CTL if tracing
is enabled (enforced via a VMX consistency check). Per the SDM:
If the logical processor is operating with Intel PT enabled (if
IA32_RTIT_CTL.TraceEn = 1) at the time of VM entry, the "load
IA32_RTIT_CTL" VM-entry control must be 0.
On the host side, KVM doesn't validate the guest CPUID configuration
provided by userspace, and even worse, uses the guest configuration to
decide what MSRs to save/load at VM-Enter and VM-Exit. E.g. configuring
guest CPUID to enumerate more address ranges than are supported in hardware
will result in KVM trying to passthrough, save, and load non-existent MSRs,
which generates a variety of WARNs, ToPA ERRORs in the host, a potential
deadlock, etc.
Fixes: f99e3daf94 ("KVM: x86: Add Intel PT virtualization work mode")
Cc: stable@vger.kernel.org
Cc: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Xiaoyao Li <xiaoyao.li@intel.com>
Tested-by: Adrian Hunter <adrian.hunter@intel.com>
Message-ID: <20241101185031.1799556-2-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
In order to simplify further introduction of hyperlinks, replace explicit
section numbers with rST hyperlinks. The section numbers could actually
be removed now, but I'm not going to do a huge change throughout the file
for an RFC...
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-ID: <20241023124507.280382-4-pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Always set irr_pending (to true) when updating APICv status to fix a bug
where KVM fails to set irr_pending when userspace sets APIC state and
APICv is disabled, which ultimate results in KVM failing to inject the
pending interrupt(s) that userspace stuffed into the vIRR, until another
interrupt happens to be emulated by KVM.
Only the APICv-disabled case is flawed, as KVM forces apic->irr_pending to
be true if APICv is enabled, because not all vIRR updates will be visible
to KVM.
Hit the bug with a big hammer, even though strictly speaking KVM can scan
the vIRR and set/clear irr_pending as appropriate for this specific case.
The bug was introduced by commit 755c2bf878 ("KVM: x86: lapic: don't
touch irr_pending in kvm_apic_update_apicv when inhibiting it"), which as
the shortlog suggests, deleted code that updated irr_pending.
Before that commit, kvm_apic_update_apicv() did indeed scan the vIRR, with
with the crucial difference that kvm_apic_update_apicv() did the scan even
when APICv was being *disabled*, e.g. due to an AVIC inhibition.
struct kvm_lapic *apic = vcpu->arch.apic;
if (vcpu->arch.apicv_active) {
/* irr_pending is always true when apicv is activated. */
apic->irr_pending = true;
apic->isr_count = 1;
} else {
apic->irr_pending = (apic_search_irr(apic) != -1);
apic->isr_count = count_vectors(apic->regs + APIC_ISR);
}
And _that_ bug (clearing irr_pending) was introduced by commit b26a695a1d
("kvm: lapic: Introduce APICv update helper function"), prior to which KVM
unconditionally set irr_pending to true in kvm_apic_set_state(), i.e.
assumed that the new virtual APIC state could have a pending IRQ.
Furthermore, in addition to introducing this issue, commit 755c2bf878
also papered over the underlying bug: KVM doesn't ensure CPUs and devices
see APICv as disabled prior to searching the IRR. Waiting until KVM
emulates an EOI to update irr_pending "works", but only because KVM won't
emulate EOI until after refresh_apicv_exec_ctrl(), and there are plenty of
memory barriers in between. I.e. leaving irr_pending set is basically
hacking around bad ordering.
So, effectively revert to the pre-b26a695a1d78 behavior for state restore,
even though it's sub-optimal if no IRQs are pending, in order to provide a
minimal fix, but leave behind a FIXME to document the ugliness. With luck,
the ordering issue will be fixed and the mess will be cleaned up in the
not-too-distant future.
Fixes: 755c2bf878 ("KVM: x86: lapic: don't touch irr_pending in kvm_apic_update_apicv when inhibiting it")
Cc: stable@vger.kernel.org
Cc: Maxim Levitsky <mlevitsk@redhat.com>
Reported-by: Yong He <zhuangel570@gmail.com>
Closes: https://lkml.kernel.org/r/20241023124527.1092810-1-alexyonghe%40tencent.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-ID: <20241106015135.2462147-1-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The only occurrence "Capability: none" actually meant the same as "basic".
Fix that and a few more aesthetic or content issues in the document.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-ID: <20241023124507.280382-3-pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This was only needed for PPC970 support, which is long gone: the
implementation was removed in 2014.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-ID: <20241023124507.280382-2-pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
In 08a7d25255 ("tools arch x86: Sync the msr-index.h copy with the
kernel sources"), VMX_BASIC_MEM_TYPE_WB was removed. Use X86_MEMTYPE_WB
instead.
Fixes: 08a7d25255 ("tools arch x86: Sync the msr-index.h copy with the
kernel sources")
Signed-off-by: John Sperbeck <jsperbeck@google.com>
Message-ID: <20241106034031.503291-1-jsperbeck@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
KVM x86 and selftests fixes for 6.12:
- Increase the timeout for the memslot performance selftest to avoid false
failures on arm64 and nested x86 platforms.
- Fix a goof in the guest_memfd selftest where a for-loop initialized a
bit mask to zero instead of BIT(0).
- Disable strict aliasing when building KVM selftests to prevent the
compiler from treating things like "u64 *" to "uint64_t *" cases as
undefined behavior, which can lead to nasty, hard to debug failures.
- Force -march=x86-64-v2 for KVM x86 selftests if and only if the uarch
is supported by the compiler.
- When emulating a guest TLB flush for a nested guest, flush vpid01, not
vpid02, if L2 is active but VPID is disabled in vmcs12, i.e. if L2 and
L1 are sharing VPID '0' (from L1's perspective).
- Fix a bug in the SNP initialization flow where KVM would return '0' to
userspace instead of -errno on failure.
Adding gpio-line-names property works fine for this
device node, but dtb check drops warning:
'gpio-line-names' does not match any of the regexes: '-cfg$', 'pinctrl-[0-9]+'
from schema $id: http://devicetree.org/schemas/pinctrl/semtech,sx1501q.yaml#
Allow to add property gpio-line-names for this devices.
Signed-off-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/20241105064206.43626-3-hs@denx.de
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Add the "marvell,pxa1908-padconf" compatible to allow migrating to a
separate pinctrl driver later.
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Duje Mihanović <duje.mihanovic@skole.hr>
Link: https://lore.kernel.org/20241104-pxa1908-lkml-v13-3-e050609b8d6c@skole.hr
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Add the "marvell,pxa1908-padconf" compatible to allow migrating to a
separate pinctrl driver later.
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Duje Mihanović <duje.mihanovic@skole.hr>
Link: https://lore.kernel.org/20241104-pxa1908-lkml-v13-2-e050609b8d6c@skole.hr
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
A moderately large pile of small changes here, split fairly evenly
between fixes and ID additions/quirks and all of it driver specific.
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Merge tag 'asoc-fix-v6.12-rc6' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus
ASoC: Fixes for v6.12
A moderately large pile of small changes here, split fairly evenly
between fixes and ID additions/quirks and all of it driver specific.
It should be PINMUX/PINMUX2, not GPIOMUX/GPIOMUX2, see
<dt-bindings/pinctrl/pinctrl-cv1800b.h>.
Fixes: 64aa494de6 ("dt-bindings: pinctrl: Add pinctrl for Sophgo CV1800 series SoC.")
Signed-off-by: Chen Wang <unicorn_wang@outlook.com>
Reviewed-by: Inochi Amaoto <inochiama@gmail.com>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/20241029012312.3448287-1-unicornxw@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Document the 8 GPIOs found on PM8937. It has holes on
3,4 and 6 pins.
Signed-off-by: Barnabás Czémán <barnabas.czeman@mainlining.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/20241031-msm8917-v2-1-8a075faa89b1@mainlining.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The use of of_property_read_bool() for non-boolean properties is
deprecated in favor of of_property_present() when testing for property
presence.
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/20241104194437.327430-1-robh@kernel.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Here's a fix for a long-standing use-after-free in an io_edgeport debug
printk and some new modem device ids.
All have been in linux-next with no reported issues.
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Merge tag 'usb-serial-6.12-rc7' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/johan/usb-serial into usb-linus
Johan writes:
USB-serial fixes for 6.12-rc7
Here's a fix for a long-standing use-after-free in an io_edgeport debug
printk and some new modem device ids.
All have been in linux-next with no reported issues.
* tag 'usb-serial-6.12-rc7' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/johan/usb-serial:
USB: serial: qcserial: add support for Sierra Wireless EM86xx
USB: serial: io_edgeport: fix use after free in debug printk
USB: serial: option: add Quectel RG650V
USB: serial: option: add Fibocom FG132 0x0112 composition
On STM32MP135F with XPT2046 touch controller attached to SPI bus, it has
been observed that the touch controller locks up after Linux kernel has
finished booting. Adding a dummy cycle on the SPI bus seems to mitigate
the lock up.
The XPTEK XPT2046 controller seems to be an identical clone of TI TSC2046,
the datasheet seems to be a clone of the TI part as well, text seem to be
word to word identical, except all the pictures have been drawn again.
This touch controller is present e.g. on WaveShare 3.2inch RPi LCD (B)
panel, the DTO provided by WaveShare uses 50 kHz SPI clock for this
touch controller, which is unusually low and possibly might have been
used as some sort of workaround for an issue. The SPI LCD on the same
bus uses 16 MHz clock.
SPI bus DT properties spi-cs-setup-delay-ns, spi-cs-hold-delay-ns,
spi-cs-inactive-delay-ns, spi-rx-delay-us, spi-tx-delay-us set to
range of 500ns..5us seem to have no impact on the behavior of the
touch controller, the lock up always occurs. The STM32MP13xx SPI
controller users GPIO control for the nCS pins.
Since the dummy cycle happens after the controller has been put into
power down mode and both ADC and REF regulators have been disabled,
the cycle should have no impact on the configuration of the controller,
i.e. it should be a NOP.
It is unclear whether this problem is specific to this cloned XPT2046
controller, or whether this is also present on TSC2046. A test on
either TSC2046 or ADS7846 would be very welcome.
Signed-off-by: Marek Vasut <marex@denx.de>
Link: https://lore.kernel.org/r/20240320072533.170029-1-marex@denx.de
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
In cs40l50_add(), the work_data is a local variable and the work_data.work
should initialize with INIT_WORK_ONSTACK() instead of INIT_WORK().
Small error in cs40l50_erase() also fixed in this commit.
Fixes: c38fe1bb5d ("Input: cs40l50 - Add support for the CS40L50 haptic driver")
Signed-off-by: Yuan Can <yuancan@huawei.com>
Reviewed-by: James Ogletree <jogletre@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20241106013549.78142-1-yuancan@huawei.com
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This fixes an assertion pop where we try to navigate to the target of
the backpointer, and the path level isn't what we expect.
Reported-by: syzbot+b17df21b4d370f2dc330@syzkaller.appspotmail.com
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Add NETIF_F_GSO_ESP bit to bond's gso_partial_features if all slaves
support it, such that ESP segmentation is handled by hardware if possible.
Signed-off-by: Jianbo Liu <jianbol@nvidia.com>
Reviewed-by: Boris Pismenny <borisp@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/20241105192721.584822-1-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Convert the "tos" parameter of ip_route_output() to dscp_t. This way
we'll have a dscp_t value directly available when .flowi4_tos will
eventually be converted to dscp_t.
All ip_route_output() callers but one set this "tos" parameter to 0 and
therefore don't need to be adapted to the new prototype.
Only br_nf_pre_routing_finish() needs conversion. It can just use
ip4h_dscp() to get the DSCP field from the IPv4 header.
Signed-off-by: Guillaume Nault <gnault@redhat.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Link: https://patch.msgid.link/0f10d031dd44c70aae9bc6e19391cb30d5c2fe71.1730928699.git.gnault@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
The write buffer needs to be specifically flushed when going RO: keys in
the journal that haven't yet been moved to the write buffer don't have a
journal pin yet.
This fixes numerous syzbot bugs, all with symptoms of still doing writes
after we've got RO.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Heiner Kallweit says:
====================
net: phy: remove genphy_config_eee_advert
This series removes genphy_config_eee_advert().
Note: The change to bcm_config_lre_aneg() is compile-tested only
as I don't have supported hardware.
====================
Link: https://patch.msgid.link/69d22b31-57d1-4b01-bfde-0c6a1df1e310@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
bcm_config_lre_aneg() doesn't use genphy_config_eee_advert() any longer.
As this was the only user, we can remove genphy_config_eee_advert() now.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Link: https://patch.msgid.link/37da7f3e-b883-4c07-9881-b8c0516822b7@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
bcm_config_lre_aneg() is the only user of genphy_config_eee_advert(),
therefore use genphy_c45_an_config_eee_aneg() instead. The resulting
functionality is equivalent, and bcm_config_lre_aneg() follows the
structure of __genphy_config_aneg().
In a follow-up step genphy_config_eee_advert() can be removed.
Note: We preserve the current behavior to ignore errors.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Link: https://patch.msgid.link/6e5cd4ab-28bb-4d82-b449-fec85f3d1e8a@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
We'll use this function in bcm_config_lre_aneg(), therefore export it.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Link: https://patch.msgid.link/02bd7c39-7413-4433-bafc-a276089bd292@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
genphy_c45_write_eee_adv() isn't used outside phy-c45.c,
so make it static.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Link: https://patch.msgid.link/d23bd784-44e6-4a15-af3a-b37379156521@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
- improve GPU hangcheck
- fix address space collision on >= 4K CPU pages
- flush all known writeback caches before memory release
- various code cleanups
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Merge tag 'drm-etnaviv-next-2024-11-07' of https://git.pengutronix.de/git/lst/linux into drm-next
- improve handling of DMA address limited systems
- improve GPU hangcheck
- fix address space collision on >= 4K CPU pages
- flush all known writeback caches before memory release
- various code cleanups
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Lucas Stach <l.stach@pengutronix.de>
Link: https://patchwork.freedesktop.org/patch/msgid/c84075a0257e7bee222d008fa3118117422d664e.camel@pengutronix.de
In the past couple years, Yu Kuai has been making solid contributions
to md/raid subsystem. Make Yu Kuai a co-maintainer.
Reviewed-by: Yu Kuai <yukuai3@huawei.com>
Link: https://lore.kernel.org/r/20241108014112.2098079-1-song@kernel.org
Signed-off-by: Song Liu <song@kernel.org>
When the LLC and NUMA domains fully overlap, enabling both optimizations
in the built-in idle CPU selection policy is redundant, as it leads to
searching for an idle CPU within the same domain twice.
Likewise, if all online CPUs are within a single LLC domain, LLC
optimization is unnecessary.
Therefore, detect overlapping domains and enable topology optimizations
only when necessary.
Moreover, rely on the online CPUs for this detection logic, instead of
using the possible CPUs.
Fixes: 860a45219b ("sched_ext: Introduce NUMA awareness to the default idle selection policy")
Signed-off-by: Andrea Righi <arighi@nvidia.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
