linux-stable.git/arch, branch v6.8.2

riscv: Fix compilation error with FAST_GUP and rv32

2024-03-26T22:17:34+00:00

[ Upstream commit 2bb7e0c49302feec1c2f777bbfe8726169986ed8 ]

By surrounding the definition of pte_leaf_size() with a ifdef napot as
it should have been.

Fixes: e0fe5ab4192c ("riscv: Fix pte_leaf_size() for NAPOT")
Signed-off-by: Alexandre Ghiti 
Reviewed-by: Randy Dunlap 
Tested-by: Randy Dunlap  # build-tested
Link: https://lore.kernel.org/r/20240304080247.387710-1-alexghiti@rivosinc.com
Signed-off-by: Palmer Dabbelt 
Signed-off-by: Sasha Levin

riscv: Only check online cpus for emulated accesses

2024-03-26T22:17:32+00:00

[ Upstream commit 313130c62cf1fc410ac8730b291fd4fde582d032 ]

The unaligned access checker only sets valid values for online cpus.
Check for these values on online cpus rather than on present cpus.

Signed-off-by: Charlie Jenkins 
Reviewed-by: Conor Dooley 
Fixes: 71c54b3d169d ("riscv: report misaligned accesses emulation to hwprobe")
Tested-by: Samuel Holland 
Link: https://lore.kernel.org/r/20240308-disable_misaligned_probe_config-v9-2-a388770ba0ce@rivosinc.com
Signed-off-by: Palmer Dabbelt 
Signed-off-by: Sasha Levin

s390/vtime: fix average steal time calculation

2024-03-26T22:17:32+00:00

[ Upstream commit 367c50f78451d3bd7ad70bc5c89f9ba6dec46ca9 ]

Current average steal timer calculation produces volatile and inflated
values. The only user of this value is KVM so far and it uses that to
decide whether or not to yield the vCPU which is seeing steal time.
KVM compares average steal timer to a threshold and if the threshold
is past then it does not allow CPU polling and yields it to host, else
it keeps the CPU by polling.
Since KVM's steal time threshold is very low by default (%10) it most
likely is not effected much by the bloated average steal timer values
because the operating region is pretty small. However there might be
new users in the future who might rely on this number. Fix average
steal timer calculation by changing the formula from:

	avg_steal_timer = avg_steal_timer / 2 + steal_timer;

to the following:

	avg_steal_timer = (avg_steal_timer + steal_timer) / 2;

This ensures that avg_steal_timer is actually a naive average of steal
timer values. It now closely follows steal timer values but of course
in a smoother manner.

Fixes: 152e9b8676c6 ("s390/vtime: steal time exponential moving average")
Signed-off-by: Mete Durlu 
Acked-by: Heiko Carstens 
Acked-by: Christian Borntraeger 
Signed-off-by: Heiko Carstens 
Signed-off-by: Sasha Levin

x86/hyperv: Use per cpu initial stack for vtl context

2024-03-26T22:17:30+00:00

[ Upstream commit 2b4b90e053a29057fb05ba81acce26bddce8d404 ]

Currently, the secondary CPUs in Hyper-V VTL context lack support for
parallel startup. Therefore, relying on the single initial_stack fetched
from the current task structure suffices for all vCPUs.

However, common initial_stack risks stack corruption when parallel startup
is enabled. In order to facilitate parallel startup, use the initial_stack
from the per CPU idle thread instead of the current task.

Fixes: 3be1bc2fe9d2 ("x86/hyperv: VTL support for Hyper-V")
Signed-off-by: Saurabh Sengar 
Reviewed-by: Michael Kelley 
Link: https://lore.kernel.org/r/1709452896-13342-1-git-send-email-ssengar@linux.microsoft.com
Signed-off-by: Wei Liu 
Message-ID: <1709452896-13342-1-git-send-email-ssengar@linux.microsoft.com>
Signed-off-by: Sasha Levin

arm64: dts: broadcom: bcmbca: bcm4908: drop invalid switch cells

2024-03-26T22:17:28+00:00

[ Upstream commit 27058b95fbb784406ea4c40b20caa3f04937140c ]

Ethernet switch does not have addressable subnodes.

This fixes:
arch/arm64/boot/dts/broadcom/bcmbca/bcm4908-asus-gt-ac5300.dtb: ethernet-switch@0: '#address-cells', '#size-cells' do not match any of the regexes: 'pinctrl-[0-9]+'
        from schema $id: http://devicetree.org/schemas/net/dsa/brcm,sf2.yaml#

Fixes: 527a3ac9bdf8 ("arm64: dts: broadcom: bcm4908: describe internal switch")
Signed-off-by: Rafał Miłecki 
Link: https://lore.kernel.org/r/20240111115636.12095-1-zajec5@gmail.com
Signed-off-by: Florian Fainelli 
Signed-off-by: Sasha Levin

perf/x86/amd/core: Avoid register reset when CPU is dead

2024-03-26T22:17:27+00:00

[ Upstream commit ad8c91282c95f801c37812d59d2d9eba6899b384 ]

When bringing a CPU online, some of the PMC and LBR related registers
are reset. The same is done when a CPU is taken offline although that
is unnecessary. This currently happens in the "cpu_dead" callback which
is also incorrect as the callback runs on a control CPU instead of the
one that is being taken offline. This also affects hibernation and
suspend to RAM on some platforms as reported in the link below.

Fixes: 21d59e3e2c40 ("perf/x86/amd/core: Detect PerfMonV2 support")
Reported-by: Mario Limonciello 
Signed-off-by: Sandipan Das 
Signed-off-by: Ingo Molnar 
Cc: Peter Zijlstra 
Link: https://lore.kernel.org/r/550a026764342cf7e5812680e3e2b91fe662b5ac.1706526029.git.sandipan.das@amd.com
Signed-off-by: Sasha Levin

mips: cm: Convert __mips_cm_l2sync_phys_base() to weak function

2024-03-26T22:17:21+00:00

[ Upstream commit 8bc8db2ab2832daabdd06feeabdd511dc9575bb6 ]

The __mips_cm_l2sync_phys_base() and mips_cm_l2sync_phys_base() couple was
introduced in commit 9f98f3dd0c51 ("MIPS: Add generic CM probe & access
code") where the former method was a weak implementation of the later
function. Such design pattern permitted to re-define the original method
and to use the weak implementation in the new function. A similar approach
was introduced in the framework of another arch-specific programmable
interface: mips_cm_phys_base() and __mips_cm_phys_base(). The only
difference is that the underscored method of the later couple was declared
in the "asm/mips-cm.h" header file, but it wasn't done for the CM L2-sync
methods in the subject. Due to the missing global function declaration
the "missing prototype" warning was spotted in the framework of the commit
9a2036724cd6 ("mips: mark local function static if possible") and fixed
just be re-qualifying the weak method as static. Doing that broke what was
originally implied by having the weak implementation globally defined.

Let's fix the broken CM2 L2-sync arch-interface by dropping the static
qualifier and, seeing the implemented pattern hasn't been used for over 10
years but will be required soon (see the link for the discussion around
it), converting it to a single weakly defined method:
mips_cm_l2sync_phys_base().

Fixes: 9a2036724cd6 ("mips: mark local function static if possible")
Link: https://lore.kernel.org/linux-mips/20240215171740.14550-3-fancer.lancer@gmail.com
Signed-off-by: Serge Semin 
Signed-off-by: Thomas Bogendoerfer 
Signed-off-by: Sasha Levin

sparc32: Fix section mismatch in leon_pci_grpci

2024-03-26T22:17:19+00:00

[ Upstream commit 24338a6ae13cb743ced77da1b3a12c83f08a0c96 ]

Passing a datastructre marked _initconst to platform_driver_register()
is wrong. Drop the __initconst notation.

This fixes the following warnings:

WARNING: modpost: vmlinux: section mismatch in reference: grpci1_of_driver+0x30 (section: .data) -> grpci1_of_match (section: .init.rodata)
WARNING: modpost: vmlinux: section mismatch in reference: grpci2_of_driver+0x30 (section: .data) -> grpci2_of_match (section: .init.rodata)

Signed-off-by: Sam Ravnborg 
Cc: "David S. Miller" 
Cc: Andreas Larsson 
Fixes: 4154bb821f0b ("sparc: leon: grpci1: constify of_device_id")
Fixes: 03949b1cb9f1 ("sparc: leon: grpci2: constify of_device_id")
Tested-by: Randy Dunlap  # build-tested
Reviewed-by: Andreas Larsson 
Tested-by: Andreas Larsson 
Signed-off-by: Andreas Larsson 
Link: https://lore.kernel.org/r/20240224-sam-fix-sparc32-all-builds-v2-7-1f186603c5c4@ravnborg.org
Signed-off-by: Sasha Levin

sparc32: Do not select GENERIC_ISA_DMA

2024-03-26T22:17:19+00:00

[ Upstream commit 99bd9a4f87926e12ce60796d7db1d6b226aca5e3 ]

sparc32 do not support generic isa dma, so do not select the symbol.

This fixes the following warnings:
dma.c:70:5: error: no previous prototype for 'request_dma' [-Werror=missing-prototypes]
dma.c:88:6: error: no previous prototype for 'free_dma' [-Werror=missing-prototypes]

Signed-off-by: Sam Ravnborg 
Fixes: 0fcb70851fbf ("Makefile.extrawarn: turn on missing-prototypes globally")
Acked-by: Randy Dunlap 
Tested-by: Randy Dunlap  # build-tested
Cc: Andreas Larsson 
Cc: "David S. Miller" 
Cc: Randy Dunlap 
Cc: Maciej W. Rozycki 
Reviewed-by: Andreas Larsson 
Signed-off-by: Andreas Larsson 
Link: https://lore.kernel.org/r/20240224-sam-fix-sparc32-all-builds-v2-5-1f186603c5c4@ravnborg.org
Signed-off-by: Sasha Levin

sparc32: Use generic cmpdi2/ucmpdi2 variants

2024-03-26T22:17:19+00:00

[ Upstream commit 802a8874a3889a4a0d218d4f73e5855c96d5b8a8 ]

Use the generic variants - the implementation is the same.
As a nice side-effect fix the following warnings:

cmpdi2.c: warning: no previous prototype for '__cmpdi2' [-Wmissing-prototypes]
ucmpdi2.c: warning: no previous prototype for '__ucmpdi2' [-Wmissing-prototypes]

Signed-off-by: Sam Ravnborg 
Fixes: 0fcb70851fbf ("Makefile.extrawarn: turn on missing-prototypes globally")
Reviewed-by: Randy Dunlap 
Tested-by: Randy Dunlap  # build-tested
Reviewed-by: Maciej W. Rozycki 
Tested-by: Maciej W. Rozycki  # build-tested
Cc: "David S. Miller" 
Cc: Andreas Larsson 
Reviewed-by: Andreas Larsson 
Tested-by: Andreas Larsson 
Signed-off-by: Andreas Larsson 
Link: https://lore.kernel.org/r/20240224-sam-fix-sparc32-all-builds-v2-1-1f186603c5c4@ravnborg.org
Signed-off-by: Sasha Levin