Since commit aefbab8e77 ("arm64: fpsimd: Preserve/restore kernel mode
NEON at context switch"), kernel-mode NEON sections have been
preemptible on arm64. And since commit 7dadeaa6e8 ("sched: Further
restrict the preemption modes"), voluntary preemption is no longer
supported on arm64 either. Therefore, there's no longer any need to
limit the length of kernel-mode NEON sections on arm64.
Simplify the AES-CBC-MAC code accordingly.
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20260401000548.133151-2-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
Before the introduction of the EHINV feature, which lets software mark
TLB entries invalid, certain older implementations of the MIPS ISA were
equipped with an analogous bit, as a vendor extension, which however is
hidden from software and only ever set at reset, and then any software
write clears it, making the intended TLB entry valid.
This feature makes it unsafe to read a TLB entry with TLBR, modify the
page mask, and write the entry back with TLBWI, because this operation
will implicitly clear the hidden bit and this may create a duplicate
entry, as with the presence of the hidden bit there is no guarantee all
the entries across the TLB are unique each.
Usually the firmware has already uniquified TLB entries before handing
control over, in which case we only need to guarantee at bootstrap no
clash will happen with the VPN2 values chosen in local_flush_tlb_all().
However with systems such as Mikrotik RB532 we get handed the TLB as at
reset, with the hidden bit set across the entries and possibly duplicate
entries present. This then causes a machine check exception when page
sizes are reset in r4k_tlb_uniquify() and prevents the system from
booting.
Rewrite the algorithm used in r4k_tlb_uniquify() then such as to avoid
the reuse of ASID/VPN values across the TLB. Get rid of global entries
first as they may be blocking the entire address space, e.g. 16 256MiB
pages will exhaust the whole address space of a 32-bit CPU and a single
big page can exhaust the 32-bit compatibility space on a 64-bit CPU.
Details of the algorithm chosen are given across the code itself.
Fixes: 9f048fa487 ("MIPS: mm: Prevent a TLB shutdown on initial uniquification")
Signed-off-by: Maciej W. Rozycki <macro@orcam.me.uk>
Cc: stable@vger.kernel.org # v6.18+
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Hardware that supports the EHINV feature, mandatory for R6 ISA and FTLB
implementation, lets software mark TLB entries invalid, which eliminates
the need to ensure no duplicate matching entries are ever created. This
feature is already used by local_flush_tlb_all(), via the UNIQUE_ENTRYHI
macro, making the preceding call to r4k_tlb_uniquify() superfluous.
The next change will also modify uniquification code such that it'll
become incompatible with the FTLB and MMID features, as well as MIPSr6
CPUs that do not implement 4KiB pages.
Therefore prevent r4k_tlb_uniquify() from being used on EHINV hardware,
as denoted by `cpu_has_tlbinv'.
Signed-off-by: Maciej W. Rozycki <macro@orcam.me.uk>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
With a 32-bit kernel running on 64-bit MIPS hardware the hardcoded value
of `cpu_vmbits' only records the size of compatibility useg and does not
reflect the size of native xuseg or the complete range of values allowed
in the VPN2 field of TLB entries.
An upcoming change will need the actual VPN2 value range permitted even
in 32-bit kernel configurations, so always include the `vmbits' member
in `struct cpuinfo_mips' and probe for SEGBITS when running on 64-bit
hardware and resorting to the currently hardcoded value of 31 on 32-bit
processors. No functional change for users of `cpu_vmbits'.
Signed-off-by: Maciej W. Rozycki <macro@orcam.me.uk>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
It was only GCC 10 that fixed a MIPS64r6 code generation issue with a
`__multi3' libcall inefficiently produced to perform 64-bit widening
multiplication while suitable machine instructions exist to do such a
calculation. The fix went in with GCC commit 48b2123f6336 ("re PR
target/82981 (unnecessary __multi3 call for mips64r6 linux kernel)").
Adjust our code accordingly, removing build failures such as:
mips64-linux-ld: lib/math/div64.o: in function `mul_u64_add_u64_div_u64':
div64.c:(.text+0x84): undefined reference to `__multi3'
with the GCC versions affected.
Fixes: ebabcf17bc ("MIPS: Implement __multi3 for GCC7 MIPS64r6 builds")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202601140146.hMLODc6v-lkp@intel.com/
Signed-off-by: Maciej W. Rozycki <macro@orcam.me.uk>
Cc: stable@vger.kernel.org # v4.15+
Reviewed-by: David Laight <david.laight.linux@gmail.com.
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Bring back cache initialisation for Broadcom SiByte SB1 cores, which has
been removed causing the kernel to hang at bootstrap right after:
Dentry cache hash table entries: 524288 (order: 8, 4194304 bytes, linear)
Inode-cache hash table entries: 262144 (order: 7, 2097152 bytes, linear)
The cause of the problem is R4k cache handlers are also used by Broadcom
SiByte SB1 cores, however with a different cache error exception handler
and therefore not using CPU_R4K_CACHE_TLB:
obj-$(CONFIG_CPU_R4K_CACHE_TLB) += c-r4k.o cex-gen.o tlb-r4k.o
obj-$(CONFIG_CPU_SB1) += c-r4k.o cerr-sb1.o cex-sb1.o tlb-r4k.o
(from arch/mips/mm/Makefile).
Fixes: bbe4f634f4 ("mips: fix r3k_cache_init build regression")
Signed-off-by: Maciej W. Rozycki <macro@orcam.me.uk>
Cc: stable@vger.kernel.org # v6.8+
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Update CPU clock index to match the clock driver changes.
Fixes: d34db686a3 ("clk: ralink: mtmips: fix clocks probe order in oldest ralink SoCs")
Signed-off-by: Mieczyslaw Nalewaj <namiltd@yahoo.com>
Signed-off-by: Shiji Yang <yangshiji66@outlook.com>
Reviewed-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Some firmware does not set nr_uarts properly and passes empty items.
Iterate at most min(system->nr_uarts, MAX_UARTS) items to prevent
out-of-bounds access, and ignore UARTs with addr 0 silently.
Meanwhile, our DT only works with UPIO_MEM but theoretically firmware
may pass other IO types, so explicitly check against that.
Tested on Loongson-LS3A4000-7A1000-NUC-SE.
Fixes: 3989ed4184 ("MIPS: Loongson64: env: Fixup serial clock-frequency when using LEFI")
Cc: stable@vger.kernel.org
Reviewed-by: Yao Zi <me@ziyao.cc>
Signed-off-by: Rong Zhang <rongrong@oss.cipunited.com>
Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Since commit 3a3f61ce5e ("exec: Make sure task->comm is always
NUL-terminated"), __set_task_comm() is unlocked and no longer uses
strscpy_pad() - update the stale comment accordingly.
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Link: https://patch.msgid.link/20260401152039.724811-4-thorsten.blum@linux.dev
Signed-off-by: Kees Cook <kees@kernel.org>
Type 40 entries (Additional Information) are summarized in section 7.41 as
part of the SMBIOS specification. Generally, these entries aren't interesting
to save.
However on some AMD Zen systems, the AGESA version is stored here. This is
useful to save to the kernel message logs for debugging. It can be used to
cross-reference issues.
Implement an iterator for the Additional Information entries. Use this to find
and print the AGESA string. Do so in AMD code, since the use case is
AMD-specific.
[ bp: Match only "AGESA". ]
Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com>
Co-developed-by: "Mario Limonciello (AMD)" <superm1@kernel.org>
Signed-off-by: "Mario Limonciello (AMD)" <superm1@kernel.org>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Link: https://patch.msgid.link/20260307141024.819807-6-superm1@kernel.org
Several prints inconsistently use DMI: or dmi: or nothing. To make it clear
which prints come from dmi_scan.c, add a pr_fmt() macro.
Signed-off-by: Mario Limonciello (AMD) <superm1@kernel.org>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Link: https://patch.msgid.link/20260307141024.819807-5-superm1@kernel.org
dmi_decode() has hardcoded values with comments for each DMI entry type. The
same information is already in dmi.h though, so drop the comments and use the
definitions instead.
Signed-off-by: Mario Limonciello (AMD) <superm1@kernel.org>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Reviewed-by: Yazen Ghannam <yazen.ghannam@amd.com>
Link: https://patch.msgid.link/20260307141024.819807-3-superm1@kernel.org
The entries later in enum dmi_entry_type don't match the SMBIOS
specification¹.
The entry for type 33: `64-Bit Memory Error Information` is not present and
thus the index for all later entries is incorrect.
Add it.
Also, add missing entry types 43-46, while at it.
¹ Search for "System Management BIOS (SMBIOS) Reference Specification"
[ bp: Drop the flaky SMBIOS spec URL. ]
Fixes: 93c890dbe5 ("firmware: Add DMI entry types to the headers")
Signed-off-by: Mario Limonciello (AMD) <superm1@kernel.org>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Reviewed-by: Yazen Ghannam <yazen.ghannam@amd.com>
Link: https://patch.msgid.link/20260307141024.819807-2-superm1@kernel.org
Use the common USB helpers for looking up bulk and interrupt endpoints
(and determining endpoint numbers) instead of open coding.
Note that the NEXIO data interface has two bulk endpoints (see commit
5197424cdc ("Input: usbtouchscreen - add NEXIO (or iNexio) support")
for the descriptors).
The lookup in probe handles both bulk-in and interrupt-in endpoints and
was added to handle NEXIO devices. Replace the open coded lookup with a
lookup for the common interrupt endpoint and an explicit fallback
accepting a bulk endpoint.
This iterates over the (two) endpoints twice for NEXIO devices but makes
it more clear what is going on.
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://patch.msgid.link/20260401082212.2180434-1-johan@kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Use the type SNDRV_CTL_ELEM_TYPE_IEC958 for iec958 channel status
controls, the original type will cause mixer-test to iterate all 32bit
values, which costs a lot of time. And using IEC958 type can reduce the
control numbers.
Also enable pm runtime before updating registers to make the regmap cache
data align with the value in hardware.
Fixes: 955ac62405 ("ASoC: fsl_easrc: Add EASRC ASoC CPU DAI drivers")
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Link: https://patch.msgid.link/20260401094226.2900532-12-shengjiu.wang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
The value type of controls "Context 0 IEC958 Bits Per Sample" should be
integer, not enumerated, the issue is found by the mixer-test.
Fixes: 955ac62405 ("ASoC: fsl_easrc: Add EASRC ASoC CPU DAI drivers")
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Link: https://patch.msgid.link/20260401094226.2900532-11-shengjiu.wang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Add check of input value's range in fsl_easrc_iec958_put_bits(),
otherwise the wrong value may be written from user space.
Fixes: 955ac62405 ("ASoC: fsl_easrc: Add EASRC ASoC CPU DAI drivers")
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Link: https://patch.msgid.link/20260401094226.2900532-10-shengjiu.wang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
ALSA controls should return 1 if the value in the control changed but the
control put operation fsl_xcvr_mode_put() only returns 0 or a negative
error code, causing ALSA to not generate any change events.
Add a suitable check in the function before updating the mode variable.
Fixes: 2856448686 ("ASoC: fsl_xcvr: Add XCVR ASoC CPU DAI driver")
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Link: https://patch.msgid.link/20260401094226.2900532-9-shengjiu.wang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
ALSA controls should return 1 if the value in the control changed but the
control put operation fsl_xcvr_arc_mode_put() only returns 0 or a negative
error code, causing ALSA to not generate any change events.
Add a suitable check in the function before updating the arc_mode
variable.
Fixes: 2856448686 ("ASoC: fsl_xcvr: Add XCVR ASoC CPU DAI driver")
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Link: https://patch.msgid.link/20260401094226.2900532-8-shengjiu.wang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
ALSA controls should return 1 if the value in the control changed but the
control put operation micfil_quality_set() only returns 0 or a negative
error code, causing ALSA to not generate any change events.
Add a suitable check in the function before updating the quality variable.
Also enable pm runtime before calling the function micfil_set_quality()
to make the regmap cache data align with the value in hardware.
Fixes: bea1d61d58 ("ASoC: fsl_micfil: rework quality setting")
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Link: https://patch.msgid.link/20260401094226.2900532-7-shengjiu.wang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
ALSA controls should return 1 if the value in the control changed but the
control put operation micfil_put_dc_remover_state() only returns 0 or a
negative error code, causing ALSA to not generate any change events.
return the value of snd_soc_component_update_bits() directly, as it has
the capability of return check status of changed or not.
Also enable pm runtime before calling the function
snd_soc_component_update_bits() to make the regmap cache data align with
the value in hardware.
Fixes: 29dbfeecab ("ASoC: fsl_micfil: Add Hardware Voice Activity Detector support")
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Link: https://patch.msgid.link/20260401094226.2900532-6-shengjiu.wang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
ALSA controls should return 1 if the value in the control changed but the
control put operation micfil_range_set() only returns 0 or a negative
error code, causing ALSA to not generate any change events.
Use snd_soc_component_update_bits() function to replace the
regmap_update_bits(), for snd_soc_component_update_bits() has the
capability of return check status.
Also enable pm runtime before calling the function
snd_soc_component_update_bits() to make the regmap cache data align with
the value in hardware.
Fixes: ef1a7e02fd ("ASoC: fsl_micfil: Set channel range control")
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Link: https://patch.msgid.link/20260401094226.2900532-5-shengjiu.wang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
ALSA controls should return 1 if the value in the control changed but the
control put operation hwvad_put_init_mode() only returns 0 or a negative
error code, causing ALSA to not generate any change events.
Add a suitable check in the function before updating the vad_init_mode
variable.
Fixes: 29dbfeecab ("ASoC: fsl_micfil: Add Hardware Voice Activity Detector support")
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Link: https://patch.msgid.link/20260401094226.2900532-4-shengjiu.wang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
ALSA controls should return 1 if the value in the control changed but the
control put operation hwvad_put_enable() only returns 0 or a negative
error code, causing ALSA to not generate any change events.
Add a suitable check in the function before updating the vad_enabled
variable.
Fixes: 29dbfeecab ("ASoC: fsl_micfil: Add Hardware Voice Activity Detector support")
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Link: https://patch.msgid.link/20260401094226.2900532-3-shengjiu.wang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Add access property SNDRV_CTL_ELEM_ACCESS_READ for control "VAD
Detected", which doesn't support put operation, otherwise there will be
issue with mixer-test.
Fixes: 29dbfeecab ("ASoC: fsl_micfil: Add Hardware Voice Activity Detector support")
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Link: https://patch.msgid.link/20260401094226.2900532-2-shengjiu.wang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
USB drivers bind to USB interfaces and any device managed resources
should have their lifetime tied to the interface rather than parent USB
device. This avoids issues like memory leaks when drivers are unbound
without their devices being physically disconnected (e.g. on probe
deferral or configuration changes).
Fix the controller and driver data lifetime so that they are released
on driver unbind.
Note that this also makes sure that the SPI controller is placed
correctly under the USB interface in the device tree.
Fixes: 8846739f52 ("spi: add ch341a usb2spi driver")
Cc: stable@vger.kernel.org # 6.11
Cc: Johannes Thumshirn <jth@kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://patch.msgid.link/20260327104305.1309915-3-johan@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Make sure to deregister the controller, disable pins, and kill and free
the RX URB on probe failures to mirror disconnect and avoid memory
leaks and use-after-free.
Also add an explicit URB kill on disconnect for symmetry (even if that
is not strictly required as USB core would have stopped it in the
current setup).
Fixes: 8846739f52 ("spi: add ch341a usb2spi driver")
Cc: stable@vger.kernel.org # 6.11
Cc: Johannes Thumshirn <jth@kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://patch.msgid.link/20260327104305.1309915-2-johan@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
- Add DT overlay support for the MayQueen PixPaper display on the
Yuridenki-Shokai Kakip board,
- Add Ethernet PHY interrupt support for the RZ/T2H and RZ/N2H EVK
boards,
- Add SPI and PCIe support for the RZ/G3E SoC and the RZ/G3E SMARC EVK
board,
- Add DT overlay support for the WaveShare 13.3" 1920x1080 DSI
Capacitive Touch Display and the Olimex MIPI-HDMI adapter on the
Retronix Sparrow Hawk board,
- Drop several superfluous C22 Ethernet PHY compatible strings,
- Remove WDT nodes meant for other CPU cores on the RZ/V2N SoC,
- Remove unavailable LVDS panel support for the Beacon ReneSoM base
board,
- Add initial support for the RZ/G3L (R9A08G046) SoC, and the RZ/G3L
SMARC SoM and EVK boards,
- Add Versa3 clock generator support for the RZ/V2H EVK development
board,
- Miscellaneous fixes and improvements.
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Merge tag 'renesas-dts-for-v7.1-tag2' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-devel into soc/dt
Renesas DTS updates for v7.1 (take two)
- Add DT overlay support for the MayQueen PixPaper display on the
Yuridenki-Shokai Kakip board,
- Add Ethernet PHY interrupt support for the RZ/T2H and RZ/N2H EVK
boards,
- Add SPI and PCIe support for the RZ/G3E SoC and the RZ/G3E SMARC EVK
board,
- Add DT overlay support for the WaveShare 13.3" 1920x1080 DSI
Capacitive Touch Display and the Olimex MIPI-HDMI adapter on the
Retronix Sparrow Hawk board,
- Drop several superfluous C22 Ethernet PHY compatible strings,
- Remove WDT nodes meant for other CPU cores on the RZ/V2N SoC,
- Remove unavailable LVDS panel support for the Beacon ReneSoM base
board,
- Add initial support for the RZ/G3L (R9A08G046) SoC, and the RZ/G3L
SMARC SoM and EVK boards,
- Add Versa3 clock generator support for the RZ/V2H EVK development
board,
- Miscellaneous fixes and improvements.
* tag 'renesas-dts-for-v7.1-tag2' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-devel: (29 commits)
ARM: dts: renesas: Drop KSZ8041 PHY C22 compatible strings
ARM: dts: renesas: rza2mevb: Drop RTL8201F PHY C22 compatible string
ARM: dts: renesas: r8a7742-iwg21d-q7-dbcm-ca: Drop KSZ8081 PHY C22 compatible string
arm64: dts: renesas: Add initial device tree for RZ/G3L SMARC EVK board
arm64: dts: renesas: renesas-smarc2: Move usb3 nodes to board DTS
arm64: dts: renesas: Add initial support for RZ/G3L SMARC SoM
arm64: dts: renesas: Add initial DTSI for RZ/G3L SoC
arm64: dts: renesas: r9a09g057h44-rzv2h-evk: Add versa3 clock generator node
dt-bindings: clock: renesas,rzg2l-cpg: Document RZ/G3L SoC
arm64: dts: renesas: beacon-renesom: Remove LVDS Panel
ARM: dts: r9a06g032: Add #address-cells to the GIC node
arm64: dts: renesas: r9a09g056: Remove wdt{0,2,3} nodes
arm64: dts: renesas: sparrow-hawk: Add overlay for Olimex MIPI-HDMI adapter
arm64: dts: renesas: r9a09g047e57-smarc: Enable PCIe
arm64: dts: renesas: r9a09g047e57-smarc-som: Add PCIe reference clock
arm64: dts: renesas: r9a09g047: Add PCIe node
arm64: dts: renesas: Fix KSZ9131 PHY bogus txdv-skew-psec properties
arm64: dts: renesas: Drop KSZ9131 PHY C22 compatible strings
arm64: dts: renesas: Drop RTL8211F PHY C22 compatible strings
arm64: dts: renesas: Drop RTL8211E PHY C22 compatible strings
...
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
enum pgtable_type was introduced for arm64 by commit c64f46ee13
("arm64: mm: use enum to identify pgtable level instead of
*_SHIFT"). In the meantime, the generic enum pgtable_level got
introduced by commit b22cc9a9c7 ("mm/rmap: convert "enum
rmap_level" to "enum pgtable_level"").
Let's switch to the generic enum pgtable_level. The only difference
is that it also includes PGD level; __pgd_pgtable_alloc() isn't
expected to create PGD tables so we add a VM_WARN_ON() for that
case.
Suggested-by: David Hildenbrand (Arm) <david@kernel.org>
Reviewed-by: David Hildenbrand (Arm) <david@kernel.org>
Reviewed-by: Ryan Roberts <ryan.roberts@arm.com>
Signed-off-by: Kevin Brodsky <kevin.brodsky@arm.com>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Linear and vmemmap mappings that get torn down during a memory hot remove
operation might contain leaf level entries on any page table level. If the
requested memory range's linear or vmemmap mappings falls within such leaf
entries, new mappings need to be created for the remaining memory mapped on
the leaf entry earlier, following standard break before make aka BBM rules.
But kernel cannot tolerate BBM and hence remapping to fine grained leaves
would not be possible on systems without BBML2_NOABORT.
Currently memory hot remove operation does not perform such restructuring,
and so removing memory ranges that could split a kernel leaf level mapping
need to be rejected.
While memory_hotplug.c does appear to permit hot removing arbitrary ranges
of memory, the higher layers that drive memory_hotplug (e.g. ACPI, virtio,
...) all appear to treat memory as fixed size devices. So it is impossible
to hot unplug a different amount than was previously hot plugged, and hence
we should never see a rejection in practice, but adding the check makes us
robust against a future change.
Cc: Will Deacon <will@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Link: https://lore.kernel.org/all/aWZYXhrT6D2M-7-N@willie-the-truck/
Reviewed-by: David Hildenbrand (Arm) <david@kernel.org>
Reviewed-by: Ryan Roberts <ryan.roberts@arm.com>
Suggested-by: Ryan Roberts <ryan.roberts@arm.com>
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
During a memory hot remove operation, both linear and vmemmap mappings for
the memory range being removed, get unmapped via unmap_hotplug_range() but
mapped pages get freed only for vmemmap mapping. This is just a sequential
operation where each table entry gets cleared, followed by a leaf specific
TLB flush, and then followed by memory free operation when applicable.
This approach was simple and uniform both for vmemmap and linear mappings.
But linear mapping might contain CONT marked block memory where it becomes
necessary to first clear out all entire in the range before a TLB flush.
This is as per the architecture requirement. Hence batch all TLB flushes
during the table tear down walk and finally do it in unmap_hotplug_range().
Prior to this fix, it was hypothetically possible for a speculative access
to a higher address in the contiguous block to fill the TLB with shattered
entries for the entire contiguous range after a lower address had already
been cleared and invalidated. Due to the table entries being shattered, the
subsequent TLB invalidation for the higher address would not then clear the
TLB entries for the lower address, meaning stale TLB entries could persist.
Besides it also helps in improving the performance via TLBI range operation
along with reduced synchronization instructions. The time spent executing
unmap_hotplug_range() improved 97% measured over a 2GB memory hot removal
in KVM guest.
This scheme is not applicable during vmemmap mapping tear down where memory
needs to be freed and hence a TLB flush is required after clearing out page
table entry.
Cc: Will Deacon <will@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Closes: https://lore.kernel.org/all/aWZYXhrT6D2M-7-N@willie-the-truck/
Fixes: bbd6ec605c ("arm64/mm: Enable memory hot remove")
Cc: stable@vger.kernel.org
Reviewed-by: David Hildenbrand (Arm) <david@kernel.org>
Reviewed-by: Ryan Roberts <ryan.roberts@arm.com>
Signed-off-by: Ryan Roberts <ryan.roberts@arm.com>
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
There are 3 scenarios that leads to a locked region:
1. A region is created on a root decoder with Fixed Device Confiuration
attribute.
2. CXL_HDM_DECODER0_CTRL_LOCK.
Both 1 & 1 are well described in:
commit 2230c4bdc4 ("cxl: Add handling of locked CXL decoder")
3) Platform that has region creation with PRMT address translation always
locks the region, regardless of the FIXED attribute or decoder ctrl bit.
Region locked means region destroy operations are not permitted. CXL
region driver returns -EPERM for region destroy operations.
Although the locked status of the corresponding root decoder implies the
region is also locked, exposing the region lock status directly to
userspace improves usability for users who may not be aware of this
relationship.
[ dj: Amended commit log with additional locking scenarios. ]
Signed-off-by: Li Ming <ming.li@zohomail.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Alejandro Lucero <alucerop@amd.com>
Reviewed-by: Alison Schofield <alison.schofield@intel.com>
Link: https://patch.msgid.link/20260401124951.1290041-1-ming.li@zohomail.com
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
GICv5 supports up to 128 PPIs, which would introduce a large amount of
overhead if all of them were actively tracked. Rather than keeping
track of all 128 potential PPIs, we instead only consider the set of
architected PPIs (the first 64). Moreover, we further reduce that set
by only exposing a subset of the PPIs to a guest. In practice, this
means that only 4 PPIs are typically exposed to a guest - the SW_PPI,
PMUIRQ, and the timers.
When folding the PPI state, changed bits in the active or pending were
used to choose which state to sync back. However, this breaks badly
for Edge interrupts when exiting the guest before it has consumed the
edge. There is no change in pending state detected, and the edge is
lost forever.
Given the reduced set of PPIs exposed to the guest, and the issues
around tracking the edges, drop the tracking of changed state, and
instead iterate over the limited subset of PPIs exposed to the guest
directly.
This change drops the second copy of the PPI pending state used for
detecting edges in the pending state, and reworks
vgic_v5_fold_ppi_state() to iterate over the VM's PPI mask instead.
Signed-off-by: Sascha Bischoff <sascha.bischoff@arm.com>
Link: https://patch.msgid.link/20260401162152.932243-1-sascha.bischoff@arm.com
Signed-off-by: Marc Zyngier <maz@kernel.org>
The #endif comment says "BITS_PER_LONG >= 64", but the corresponding #if
guard is "BITS_PER_LONG < 64".
The comment was originally correct when the block had a three-way
#if/#else/#endif structure, where the #else branch provided a 64-bit inline
version. Commit 79bf2bb335 ("[PATCH] tick-management: dyntick / highres
functionality") removed the #else branch but did not update the #endif
comment, leaving it inconsistent with the remaining #if condition.
Fix the comment to match the preprocessor guard.
Signed-off-by: Zhan Xusheng <zhanxusheng@xiaomi.com>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/20260331074811.26147-1-zhanxusheng@xiaomi.com
1. Add initial support for Axis ARTPEC-9 SoC and Alfred board using it.
Just like ARTPEC-8, this is a derivative of Samsung Exynos SoC made
for Axis, sharing most or all of core SoC blocks with Samsung
designs.
2. New boards: Exynos7870 based Samsung Galaxy J7 (2016) and Samsung
Galaxy J5 (2017).
3. Google GS101 Pixel phone: describe all PMIC regulators and Maxim
fuel-gauge.
4. ExynosAutov920: add G3D (GPU) clock controller (CMU).
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Merge tag 'samsung-dt64-7.1' of https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux into soc/dt
Samsung DTS ARM64 changes for v7.1
1. Add initial support for Axis ARTPEC-9 SoC and Alfred board using it.
Just like ARTPEC-8, this is a derivative of Samsung Exynos SoC made
for Axis, sharing most or all of core SoC blocks with Samsung
designs.
2. New boards: Exynos7870 based Samsung Galaxy J7 (2016) and Samsung
Galaxy J5 (2017).
3. Google GS101 Pixel phone: describe all PMIC regulators and Maxim
fuel-gauge.
4. ExynosAutov920: add G3D (GPU) clock controller (CMU).
* tag 'samsung-dt64-7.1' of https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux:
arm64: dts: exynos8895: Move I2C address/size-cells to DTSI
arm64: dts: exynos7870: Move I2C address/size-cells to DTSI
arm64: dts: exynos: gs101-pixel-common: add Maxim MAX77759 fuel gauge
arm64: dts: exynos: add initial support for Samsung Galaxy J5
dt-bindings: arm: samsung: add compatible for samsung-j5y17lte
arm64: dts: exynosautov920: add CMU_G3D clock DT nodes
arm64: dts: exynos: gs101-pixel: add all S2MPG1x regulators
arm64: dts: exynos: add initial support for Samsung Galaxy J7 (2016)
dt-bindings: arm: samsung: add compatible for samsung-j7xelte
arm64: dts: axis: artpec9: Fix missing soc unit address
arm64: dts: axis: Add ARTPEC-9 Alfred board support
arm64: dts: exynos: axis: Add initial ARTPEC-9 SoC support
dt-bindings: arm: axis: Add ARTPEC-9 alfred board
dt-bindings: clock: Add ARTPEC-9 clock controller
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
for 7.1, please pull the following:
- Maira adds the V3D DT node to the 2712 (Raspberry Pi 5) SoC
- Gergor adds the I2C controller, CSI (camera), ISP (image signal
processor), fixes the pinctrl node and updates the UART10 interrupt
for the RP1 sister chip to the 2712 (Raspberry Pi 5)
- Rob moves the firmware and GPU to the root level to fix DTC warnings
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Merge tag 'arm-soc/for-7.1/devicetree-arm64' of https://github.com/Broadcom/stblinux into soc/dt
This pull request contains Broadcom ARM64-based SoCs Device Tree updates
for 7.1, please pull the following:
- Maira adds the V3D DT node to the 2712 (Raspberry Pi 5) SoC
- Gergor adds the I2C controller, CSI (camera), ISP (image signal
processor), fixes the pinctrl node and updates the UART10 interrupt
for the RP1 sister chip to the 2712 (Raspberry Pi 5)
- Rob moves the firmware and GPU to the root level to fix DTC warnings
* tag 'arm-soc/for-7.1/devicetree-arm64' of https://github.com/Broadcom/stblinux:
arm64: dts: broadcom: bcm2712: Move non simple-bus nodes to root level
arm64: dts: broadcom: bcm2712-d-rpi-5-b: update uart10 interrupt
arm64: dts: broadcom: bcm2712-d-rpi-5-b: add fixes for pinctrl/pinctrl_aon
arm64: dts: broadcom: bcm2712-rpi-5-b: add pinctrl properties for csi i2cs
arm64: dts: broadcom: bcm2712: add camera backend node pispbe
arm64: dts: broadcom: rp1: add csi nodes
arm64: dts: broadcom: rp1: add i2c controller
arm64: dts: broadcom: bcm2712: Add V3D device node
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Smatch warns:
io_uring/zcrx.c:393 io_allocate_rbuf_ring() warn: should 'id << 16' be a 64 bit type?
The expression 'id << IORING_OFF_PBUF_SHIFT' is evaluated using 32-bit
arithmetic because id is a u32. This may overflow before being promoted
to the 64-bit mmap_offset.
Cast id to u64 before shifting to ensure the shift is performed in
64-bit arithmetic.
Signed-off-by: Anas Iqbal <mohd.abd.6602@gmail.com>
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://patch.msgid.link/52400e1b343691416bef3ed3ae287fb1a88d407f.1774780198.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
The copy fallback path doesn't care about the actual niov size and only
uses first PAGE_SIZE bytes, and any additional space will be wasted.
Since ZCRX_REG_NODEV solely relies on the copy path, it doesn't make
sense to support non-standard rx_buf_len. Reject it for now, and
re-enable once improved.
Fixes: c11728021d5cd ("io_uring/zcrx: implement device-less mode for zcrx")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://patch.msgid.link/3e7652d9c27f8ac5d2b141e3af47971f2771fb05.1774780198.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
io_async_cancel_prep() reads the opcode selector from sqe->len and
stores it in cancel->opcode, which is an 8-bit field. Since sqe->len
is a 32-bit value, values larger than U8_MAX are implicitly truncated.
This can cause unintended opcode matches when the truncated value
corresponds to a valid io_uring opcode. For example, submitting a value
such as 0x10b will be truncated to 0x0b (IORING_OP_TIMEOUT), allowing a
cancel request to match operations it did not intend to target.
Validate the opcode value before assigning it to the 8-bit field and
reject values outside the valid io_uring opcode range.
Signed-off-by: Amir Mohammad Jahangirzad <a.jahangirzad@gmail.com>
Link: https://patch.msgid.link/20260331232113.615972-1-a.jahangirzad@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Replace kfree(node) with io_cache_free() in io_buffer_register_bvec()
to match all other error paths that free nodes allocated via
io_rsrc_node_alloc(). The node is allocated through io_cache_alloc()
internally, so it should be returned to the cache via io_cache_free()
for proper object reuse.
Signed-off-by: Jackie Liu <liuyun01@kylinos.cn>
Link: https://patch.msgid.link/20260331104509.7055-1-liu.yun@linux.dev
[axboe: remove fixes tag, it's not a fix, it's a cleanup]
Signed-off-by: Jens Axboe <axboe@kernel.dk>
