<feed xmlns='http://www.w3.org/2005/Atom'>
<title>linux-stable.git/arch/arm64, branch linux-4.9.y</title>
<subtitle>Linux kernel stable tree</subtitle>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/'/>
<entry>
<title>arm64: errata: Fix KVM Spectre-v2 mitigation selection for Cortex-A57/A72</title>
<updated>2022-12-08T10:15:41+00:00</updated>
<author>
<name>James Morse</name>
<email>james.morse@arm.com</email>
</author>
<published>2022-11-30T18:29:56+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=844512da025d639cbdf4800d5ed9a7d0da5af494'/>
<id>844512da025d639cbdf4800d5ed9a7d0da5af494</id>
<content type='text'>
Both the Spectre-v2 and Spectre-BHB mitigations involve running a sequence
immediately after exiting a guest, before any branches. In the stable
kernels these sequences are built by copying templates into an empty vector
slot.

For Spectre-BHB, Cortex-A57 and A72 require the branchy loop with k=8.
If Spectre-v2 needs mitigating at the same time, a firmware call to EL3 is
needed. The work EL3 does at this point is also enough to mitigate
Spectre-BHB.

When enabling the Spectre-BHB mitigation, spectre_bhb_enable_mitigation()
should check if a slot has already been allocated for Spectre-v2, meaning
no work is needed for Spectre-BHB.

This check was missed in the earlier backport, add it.

Fixes: 4dd8aae585a5 ("arm64: Mitigate spectre style branch history side channels")
Signed-off-by: James Morse &lt;james.morse@arm.com&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Both the Spectre-v2 and Spectre-BHB mitigations involve running a sequence
immediately after exiting a guest, before any branches. In the stable
kernels these sequences are built by copying templates into an empty vector
slot.

For Spectre-BHB, Cortex-A57 and A72 require the branchy loop with k=8.
If Spectre-v2 needs mitigating at the same time, a firmware call to EL3 is
needed. The work EL3 does at this point is also enough to mitigate
Spectre-BHB.

When enabling the Spectre-BHB mitigation, spectre_bhb_enable_mitigation()
should check if a slot has already been allocated for Spectre-v2, meaning
no work is needed for Spectre-BHB.

This check was missed in the earlier backport, add it.

Fixes: 4dd8aae585a5 ("arm64: Mitigate spectre style branch history side channels")
Signed-off-by: James Morse &lt;james.morse@arm.com&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>arm64: Fix panic() when Spectre-v2 causes Spectre-BHB to re-allocate KVM vectors</title>
<updated>2022-12-08T10:15:41+00:00</updated>
<author>
<name>James Morse</name>
<email>james.morse@arm.com</email>
</author>
<published>2022-11-30T18:29:55+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=bd8b9fb0d3aad2e07d6adf66b13916803ed0d03c'/>
<id>bd8b9fb0d3aad2e07d6adf66b13916803ed0d03c</id>
<content type='text'>
Sami reports that linux panic()s when resuming from suspend to RAM. This
is because when CPUs are brought back online, they re-enable any
necessary mitigations.

The Spectre-v2 and Spectre-BHB mitigations interact as both need to
done by KVM when exiting a guest. Slots KVM can use as vectors are
allocated, and templates for the mitigation are patched into the vector.

This fails if a new slot needs to be allocated once the kernel has finished
booting as it is no-longer possible to modify KVM's vectors:
| root@adam:/sys/devices/system/cpu/cpu1# echo 1 &gt; online
| Unable to handle kernel write to read-only memory at virtual add&gt;
| Mem abort info:
|   ESR = 0x9600004e
|   Exception class = DABT (current EL), IL = 32 bits
|   SET = 0, FnV = 0
|   EA = 0, S1PTW = 0
| Data abort info:
|   ISV = 0, ISS = 0x0000004e
|   CM = 0, WnR = 1
| swapper pgtable: 4k pages, 48-bit VAs, pgdp = 000000000f07a71c
| [ffff800000b4b800] pgd=00000009ffff8803, pud=00000009ffff7803, p&gt;
| Internal error: Oops: 9600004e [#1] PREEMPT SMP
| Modules linked in:
| Process swapper/1 (pid: 0, stack limit = 0x0000000063153c53)
| CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.19.252-dirty #14
| Hardware name: ARM LTD ARM Juno Development Platform/ARM Juno De&gt;
| pstate: 000001c5 (nzcv dAIF -PAN -UAO)
| pc : __memcpy+0x48/0x180
| lr : __copy_hyp_vect_bpi+0x64/0x90

| Call trace:
|  __memcpy+0x48/0x180
|  kvm_setup_bhb_slot+0x204/0x2a8
|  spectre_bhb_enable_mitigation+0x1b8/0x1d0
|  __verify_local_cpu_caps+0x54/0xf0
|  check_local_cpu_capabilities+0xc4/0x184
|  secondary_start_kernel+0xb0/0x170
| Code: b8404423 b80044c3 36180064 f8408423 (f80084c3)
| ---[ end trace 859bcacb09555348 ]---
| Kernel panic - not syncing: Attempted to kill the idle task!
| SMP: stopping secondary CPUs
| Kernel Offset: disabled
| CPU features: 0x10,25806086
| Memory Limit: none
| ---[ end Kernel panic - not syncing: Attempted to kill the idle ]

This is only a problem on platforms where there is only one CPU that is
vulnerable to both Spectre-v2 and Spectre-BHB.

The Spectre-v2 mitigation identifies the slot it can re-use by the CPU's
'fn'. It unconditionally writes the slot number and 'template_start'
pointer. The Spectre-BHB mitigation identifies slots it can re-use by
the CPU's template_start pointer, which was previously clobbered by the
Spectre-v2 mitigation.

When there is only one CPU that is vulnerable to both issues, this causes
Spectre-v2 to try to allocate a new slot, which fails.

Change both mitigations to check whether they are changing the slot this
CPU uses before writing the percpu variables again.

This issue only exists in the stable backports for Spectre-BHB which have
to use totally different infrastructure to mainline.

Reported-by: Sami Lee &lt;sami.lee@mediatek.com&gt;
Fixes: 4dd8aae585a5 ("arm64: Mitigate spectre style branch history side channels")
Signed-off-by: James Morse &lt;james.morse@arm.com&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Sami reports that linux panic()s when resuming from suspend to RAM. This
is because when CPUs are brought back online, they re-enable any
necessary mitigations.

The Spectre-v2 and Spectre-BHB mitigations interact as both need to
done by KVM when exiting a guest. Slots KVM can use as vectors are
allocated, and templates for the mitigation are patched into the vector.

This fails if a new slot needs to be allocated once the kernel has finished
booting as it is no-longer possible to modify KVM's vectors:
| root@adam:/sys/devices/system/cpu/cpu1# echo 1 &gt; online
| Unable to handle kernel write to read-only memory at virtual add&gt;
| Mem abort info:
|   ESR = 0x9600004e
|   Exception class = DABT (current EL), IL = 32 bits
|   SET = 0, FnV = 0
|   EA = 0, S1PTW = 0
| Data abort info:
|   ISV = 0, ISS = 0x0000004e
|   CM = 0, WnR = 1
| swapper pgtable: 4k pages, 48-bit VAs, pgdp = 000000000f07a71c
| [ffff800000b4b800] pgd=00000009ffff8803, pud=00000009ffff7803, p&gt;
| Internal error: Oops: 9600004e [#1] PREEMPT SMP
| Modules linked in:
| Process swapper/1 (pid: 0, stack limit = 0x0000000063153c53)
| CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.19.252-dirty #14
| Hardware name: ARM LTD ARM Juno Development Platform/ARM Juno De&gt;
| pstate: 000001c5 (nzcv dAIF -PAN -UAO)
| pc : __memcpy+0x48/0x180
| lr : __copy_hyp_vect_bpi+0x64/0x90

| Call trace:
|  __memcpy+0x48/0x180
|  kvm_setup_bhb_slot+0x204/0x2a8
|  spectre_bhb_enable_mitigation+0x1b8/0x1d0
|  __verify_local_cpu_caps+0x54/0xf0
|  check_local_cpu_capabilities+0xc4/0x184
|  secondary_start_kernel+0xb0/0x170
| Code: b8404423 b80044c3 36180064 f8408423 (f80084c3)
| ---[ end trace 859bcacb09555348 ]---
| Kernel panic - not syncing: Attempted to kill the idle task!
| SMP: stopping secondary CPUs
| Kernel Offset: disabled
| CPU features: 0x10,25806086
| Memory Limit: none
| ---[ end Kernel panic - not syncing: Attempted to kill the idle ]

This is only a problem on platforms where there is only one CPU that is
vulnerable to both Spectre-v2 and Spectre-BHB.

The Spectre-v2 mitigation identifies the slot it can re-use by the CPU's
'fn'. It unconditionally writes the slot number and 'template_start'
pointer. The Spectre-BHB mitigation identifies slots it can re-use by
the CPU's template_start pointer, which was previously clobbered by the
Spectre-v2 mitigation.

When there is only one CPU that is vulnerable to both issues, this causes
Spectre-v2 to try to allocate a new slot, which fails.

Change both mitigations to check whether they are changing the slot this
CPU uses before writing the percpu variables again.

This issue only exists in the stable backports for Spectre-BHB which have
to use totally different infrastructure to mainline.

Reported-by: Sami Lee &lt;sami.lee@mediatek.com&gt;
Fixes: 4dd8aae585a5 ("arm64: Mitigate spectre style branch history side channels")
Signed-off-by: James Morse &lt;james.morse@arm.com&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>arm64: errata: Remove AES hwcap for COMPAT tasks</title>
<updated>2022-11-03T14:49:15+00:00</updated>
<author>
<name>James Morse</name>
<email>james.morse@arm.com</email>
</author>
<published>2022-07-14T16:15:23+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=cada070e9d2f119a984ec085290104f41d6beabf'/>
<id>cada070e9d2f119a984ec085290104f41d6beabf</id>
<content type='text'>
commit 44b3834b2eed595af07021b1c64e6f9bc396398b upstream.

Cortex-A57 and Cortex-A72 have an erratum where an interrupt that
occurs between a pair of AES instructions in aarch32 mode may corrupt
the ELR. The task will subsequently produce the wrong AES result.

The AES instructions are part of the cryptographic extensions, which are
optional. User-space software will detect the support for these
instructions from the hwcaps. If the platform doesn't support these
instructions a software implementation should be used.

Remove the hwcap bits on affected parts to indicate user-space should
not use the AES instructions.

Acked-by: Ard Biesheuvel &lt;ardb@kernel.org&gt;
Signed-off-by: James Morse &lt;james.morse@arm.com&gt;
Link: https://lore.kernel.org/r/20220714161523.279570-3-james.morse@arm.com
Signed-off-by: Will Deacon &lt;will@kernel.org&gt;
[florian: resolved conflicts in arch/arm64/tools/cpucaps and cpu_errata.c]
Signed-off-by: Florian Fainelli &lt;f.fainelli@gmail.com&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
commit 44b3834b2eed595af07021b1c64e6f9bc396398b upstream.

Cortex-A57 and Cortex-A72 have an erratum where an interrupt that
occurs between a pair of AES instructions in aarch32 mode may corrupt
the ELR. The task will subsequently produce the wrong AES result.

The AES instructions are part of the cryptographic extensions, which are
optional. User-space software will detect the support for these
instructions from the hwcaps. If the platform doesn't support these
instructions a software implementation should be used.

Remove the hwcap bits on affected parts to indicate user-space should
not use the AES instructions.

Acked-by: Ard Biesheuvel &lt;ardb@kernel.org&gt;
Signed-off-by: James Morse &lt;james.morse@arm.com&gt;
Link: https://lore.kernel.org/r/20220714161523.279570-3-james.morse@arm.com
Signed-off-by: Will Deacon &lt;will@kernel.org&gt;
[florian: resolved conflicts in arch/arm64/tools/cpucaps and cpu_errata.c]
Signed-off-by: Florian Fainelli &lt;f.fainelli@gmail.com&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>arm64: map FDT as RW for early_init_dt_scan()</title>
<updated>2022-09-05T08:23:57+00:00</updated>
<author>
<name>Hsin-Yi Wang</name>
<email>hsinyi@chromium.org</email>
</author>
<published>2019-08-23T06:24:50+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=3e930a2deac2ea232965fd6650ebc7d0cbc782dd'/>
<id>3e930a2deac2ea232965fd6650ebc7d0cbc782dd</id>
<content type='text'>
commit e112b032a72c78f15d0c803c5dc6be444c2e6c66 upstream.

Currently in arm64, FDT is mapped to RO before it's passed to
early_init_dt_scan(). However, there might be some codes
(eg. commit "fdt: add support for rng-seed") that need to modify FDT
during init. Map FDT to RO after early fixups are done.

Signed-off-by: Hsin-Yi Wang &lt;hsinyi@chromium.org&gt;
Reviewed-by: Stephen Boyd &lt;swboyd@chromium.org&gt;
Reviewed-by: Mike Rapoport &lt;rppt@linux.ibm.com&gt;
Signed-off-by: Will Deacon &lt;will@kernel.org&gt;
[mkbestas: fixed trivial conflicts for 4.9 backport]
Signed-off-by: Michael Bestas &lt;mkbestas@gmail.com&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
commit e112b032a72c78f15d0c803c5dc6be444c2e6c66 upstream.

Currently in arm64, FDT is mapped to RO before it's passed to
early_init_dt_scan(). However, there might be some codes
(eg. commit "fdt: add support for rng-seed") that need to modify FDT
during init. Map FDT to RO after early fixups are done.

Signed-off-by: Hsin-Yi Wang &lt;hsinyi@chromium.org&gt;
Reviewed-by: Stephen Boyd &lt;swboyd@chromium.org&gt;
Reviewed-by: Mike Rapoport &lt;rppt@linux.ibm.com&gt;
Signed-off-by: Will Deacon &lt;will@kernel.org&gt;
[mkbestas: fixed trivial conflicts for 4.9 backport]
Signed-off-by: Michael Bestas &lt;mkbestas@gmail.com&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>arm64: entry: Restore tramp_map_kernel ISB</title>
<updated>2022-07-21T18:40:30+00:00</updated>
<author>
<name>James Morse</name>
<email>james.morse@arm.com</email>
</author>
<published>2022-07-14T16:22:25+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=7b2290c612c479608858ef3923b38265c4503cd6'/>
<id>7b2290c612c479608858ef3923b38265c4503cd6</id>
<content type='text'>
Summit reports that the BHB backports for v4.9 prevent vulnerable
platforms from booting when CONFIG_RANDOMIZE_BASE is enabled.

This is because the trampoline code takes a translation fault when
accessing the data page, because the TTBR write hasn't been completed
by an ISB before the access is made.

Upstream has a complex erratum workaround for QCOM_FALKOR_E1003 in
this area, which removes the ISB when the workaround has been applied.
v4.9 lacks this workaround, but should still have the ISB.

Restore the barrier.

Fixes: aee10c2dd013 ("arm64: entry: Add macro for reading symbol addresses from the trampoline")
Reported-by: Sumit Gupta &lt;sumitg@nvidia.com&gt;
Tested-by: Sumit Gupta &lt;sumitg@nvidia.com&gt;
Cc: &lt;stable@vger.kernel.org&gt;
Signed-off-by: James Morse &lt;james.morse@arm.com&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Summit reports that the BHB backports for v4.9 prevent vulnerable
platforms from booting when CONFIG_RANDOMIZE_BASE is enabled.

This is because the trampoline code takes a translation fault when
accessing the data page, because the TTBR write hasn't been completed
by an ISB before the access is made.

Upstream has a complex erratum workaround for QCOM_FALKOR_E1003 in
this area, which removes the ISB when the workaround has been applied.
v4.9 lacks this workaround, but should still have the ISB.

Restore the barrier.

Fixes: aee10c2dd013 ("arm64: entry: Add macro for reading symbol addresses from the trampoline")
Reported-by: Sumit Gupta &lt;sumitg@nvidia.com&gt;
Tested-by: Sumit Gupta &lt;sumitg@nvidia.com&gt;
Cc: &lt;stable@vger.kernel.org&gt;
Signed-off-by: James Morse &lt;james.morse@arm.com&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>arm64: module: remove (NOLOAD) from linker script</title>
<updated>2022-04-20T07:06:44+00:00</updated>
<author>
<name>Fangrui Song</name>
<email>maskray@google.com</email>
</author>
<published>2022-02-18T08:12:09+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=51ea21bbb41fffdeaa2c70679461a3bb256109e3'/>
<id>51ea21bbb41fffdeaa2c70679461a3bb256109e3</id>
<content type='text'>
commit 4013e26670c590944abdab56c4fa797527b74325 upstream.

On ELF, (NOLOAD) sets the section type to SHT_NOBITS[1]. It is conceptually
inappropriate for .plt and .text.* sections which are always
SHT_PROGBITS.

In GNU ld, if PLT entries are needed, .plt will be SHT_PROGBITS anyway
and (NOLOAD) will be essentially ignored. In ld.lld, since
https://reviews.llvm.org/D118840 ("[ELF] Support (TYPE=&lt;value&gt;) to
customize the output section type"), ld.lld will report a `section type
mismatch` error. Just remove (NOLOAD) to fix the error.

[1] https://lld.llvm.org/ELF/linker_script.html As of today, "The
section should be marked as not loadable" on
https://sourceware.org/binutils/docs/ld/Output-Section-Type.html is
outdated for ELF.

Tested-by: Nathan Chancellor &lt;nathan@kernel.org&gt;
Reported-by: Nathan Chancellor &lt;nathan@kernel.org&gt;
Signed-off-by: Fangrui Song &lt;maskray@google.com&gt;
Acked-by: Ard Biesheuvel &lt;ardb@kernel.org&gt;
Link: https://lore.kernel.org/r/20220218081209.354383-1-maskray@google.com
Signed-off-by: Will Deacon &lt;will@kernel.org&gt;
[nathan: Fix conflicts due to lack of 596b0474d3d9, be0f272bfc83, and 24af6c4e4e0f]
Signed-off-by: Nathan Chancellor &lt;nathan@kernel.org&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
commit 4013e26670c590944abdab56c4fa797527b74325 upstream.

On ELF, (NOLOAD) sets the section type to SHT_NOBITS[1]. It is conceptually
inappropriate for .plt and .text.* sections which are always
SHT_PROGBITS.

In GNU ld, if PLT entries are needed, .plt will be SHT_PROGBITS anyway
and (NOLOAD) will be essentially ignored. In ld.lld, since
https://reviews.llvm.org/D118840 ("[ELF] Support (TYPE=&lt;value&gt;) to
customize the output section type"), ld.lld will report a `section type
mismatch` error. Just remove (NOLOAD) to fix the error.

[1] https://lld.llvm.org/ELF/linker_script.html As of today, "The
section should be marked as not loadable" on
https://sourceware.org/binutils/docs/ld/Output-Section-Type.html is
outdated for ELF.

Tested-by: Nathan Chancellor &lt;nathan@kernel.org&gt;
Reported-by: Nathan Chancellor &lt;nathan@kernel.org&gt;
Signed-off-by: Fangrui Song &lt;maskray@google.com&gt;
Acked-by: Ard Biesheuvel &lt;ardb@kernel.org&gt;
Link: https://lore.kernel.org/r/20220218081209.354383-1-maskray@google.com
Signed-off-by: Will Deacon &lt;will@kernel.org&gt;
[nathan: Fix conflicts due to lack of 596b0474d3d9, be0f272bfc83, and 24af6c4e4e0f]
Signed-off-by: Nathan Chancellor &lt;nathan@kernel.org&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>arm64: patch_text: Fixup last cpu should be master</title>
<updated>2022-04-20T07:06:44+00:00</updated>
<author>
<name>Guo Ren</name>
<email>guoren@linux.alibaba.com</email>
</author>
<published>2022-04-07T07:33:20+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=cbd827cae3fdf8c7d2fe2a9ebe34ca4548b0028b'/>
<id>cbd827cae3fdf8c7d2fe2a9ebe34ca4548b0028b</id>
<content type='text'>
commit 31a099dbd91e69fcab55eef4be15ed7a8c984918 upstream.

These patch_text implementations are using stop_machine_cpuslocked
infrastructure with atomic cpu_count. The original idea: When the
master CPU patch_text, the others should wait for it. But current
implementation is using the first CPU as master, which couldn't
guarantee the remaining CPUs are waiting. This patch changes the
last CPU as the master to solve the potential risk.

Fixes: ae16480785de ("arm64: introduce interfaces to hotpatch kernel and module code")
Signed-off-by: Guo Ren &lt;guoren@linux.alibaba.com&gt;
Signed-off-by: Guo Ren &lt;guoren@kernel.org&gt;
Reviewed-by: Catalin Marinas &lt;catalin.marinas@arm.com&gt;
Reviewed-by: Masami Hiramatsu &lt;mhiramat@kernel.org&gt;
Cc: &lt;stable@vger.kernel.org&gt;
Link: https://lore.kernel.org/r/20220407073323.743224-2-guoren@kernel.org
Signed-off-by: Will Deacon &lt;will@kernel.org&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
commit 31a099dbd91e69fcab55eef4be15ed7a8c984918 upstream.

These patch_text implementations are using stop_machine_cpuslocked
infrastructure with atomic cpu_count. The original idea: When the
master CPU patch_text, the others should wait for it. But current
implementation is using the first CPU as master, which couldn't
guarantee the remaining CPUs are waiting. This patch changes the
last CPU as the master to solve the potential risk.

Fixes: ae16480785de ("arm64: introduce interfaces to hotpatch kernel and module code")
Signed-off-by: Guo Ren &lt;guoren@linux.alibaba.com&gt;
Signed-off-by: Guo Ren &lt;guoren@kernel.org&gt;
Reviewed-by: Catalin Marinas &lt;catalin.marinas@arm.com&gt;
Reviewed-by: Masami Hiramatsu &lt;mhiramat@kernel.org&gt;
Cc: &lt;stable@vger.kernel.org&gt;
Link: https://lore.kernel.org/r/20220407073323.743224-2-guoren@kernel.org
Signed-off-by: Will Deacon &lt;will@kernel.org&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>ARM: dts: bcm2837: Add the missing L1/L2 cache information</title>
<updated>2022-04-20T07:06:39+00:00</updated>
<author>
<name>Richard Schleich</name>
<email>rs@noreya.tech</email>
</author>
<published>2021-12-18T20:00:09+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=fff4496e67a44967fbb2f90651e9d8a30be4d480'/>
<id>fff4496e67a44967fbb2f90651e9d8a30be4d480</id>
<content type='text'>
[ Upstream commit bdf8762da268d2a34abf517c36528413906e9cd5 ]

This patch fixes the kernel warning
"cacheinfo: Unable to detect cache hierarchy for CPU 0"
for the bcm2837 on newer kernel versions.

Signed-off-by: Richard Schleich &lt;rs@noreya.tech&gt;
Tested-by: Stefan Wahren &lt;stefan.wahren@i2se.com&gt;
[florian: Align and remove comments matching property values]
Signed-off-by: Florian Fainelli &lt;f.fainelli@gmail.com&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
[ Upstream commit bdf8762da268d2a34abf517c36528413906e9cd5 ]

This patch fixes the kernel warning
"cacheinfo: Unable to detect cache hierarchy for CPU 0"
for the bcm2837 on newer kernel versions.

Signed-off-by: Richard Schleich &lt;rs@noreya.tech&gt;
Tested-by: Stefan Wahren &lt;stefan.wahren@i2se.com&gt;
[florian: Align and remove comments matching property values]
Signed-off-by: Florian Fainelli &lt;f.fainelli@gmail.com&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>arm64: dts: broadcom: Fix sata nodename</title>
<updated>2022-04-20T07:06:32+00:00</updated>
<author>
<name>Frank Wunderlich</name>
<email>frank-w@public-files.de</email>
</author>
<published>2022-03-01T15:24:18+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=ed73769ab8490ec993a9d3a7417620531281ea5e'/>
<id>ed73769ab8490ec993a9d3a7417620531281ea5e</id>
<content type='text'>
[ Upstream commit 55927cb44db43a57699fa652e2437a91620385dc ]

After converting ahci-platform txt binding to yaml nodename is reported
as not matching the standard:

arch/arm64/boot/dts/broadcom/northstar2/ns2-svk.dt.yaml:
ahci@663f2000: $nodename:0: 'ahci@663f2000' does not match '^sata(@.*)?$'

Fix it to match binding.

Fixes: ac9aae00f0fc ("arm64: dts: Add SATA3 AHCI and SATA3 PHY DT nodes for NS2")
Signed-off-by: Frank Wunderlich &lt;frank-w@public-files.de&gt;
Signed-off-by: Florian Fainelli &lt;f.fainelli@gmail.com&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
[ Upstream commit 55927cb44db43a57699fa652e2437a91620385dc ]

After converting ahci-platform txt binding to yaml nodename is reported
as not matching the standard:

arch/arm64/boot/dts/broadcom/northstar2/ns2-svk.dt.yaml:
ahci@663f2000: $nodename:0: 'ahci@663f2000' does not match '^sata(@.*)?$'

Fix it to match binding.

Fixes: ac9aae00f0fc ("arm64: dts: Add SATA3 AHCI and SATA3 PHY DT nodes for NS2")
Signed-off-by: Frank Wunderlich &lt;frank-w@public-files.de&gt;
Signed-off-by: Florian Fainelli &lt;f.fainelli@gmail.com&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>arm64: dts: ns2: Fix spi-cpol and spi-cpha property</title>
<updated>2022-04-20T07:06:32+00:00</updated>
<author>
<name>Kuldeep Singh</name>
<email>singh.kuldeep87k@gmail.com</email>
</author>
<published>2022-02-28T11:09:03+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=ce6872b4fc1e6ea35b78592ad8456ca21503341c'/>
<id>ce6872b4fc1e6ea35b78592ad8456ca21503341c</id>
<content type='text'>
[ Upstream commit c953c764e505428f59ffe6afb1c73b89b5b1ac35 ]

Broadcom ns2 platform has spi-cpol and spi-cpho properties set
incorrectly. As per spi-slave-peripheral-prop.yaml, these properties are
of flag or boolean type and not integer type. Fix the values.

Fixes: d69dbd9f41a7c (arm64: dts: Add ARM PL022 SPI DT nodes for NS2)
Signed-off-by: Kuldeep Singh &lt;singh.kuldeep87k@gmail.com&gt;
CC: Ray Jui &lt;rjui@broadcom.com&gt;
CC: Scott Branden &lt;sbranden@broadcom.com&gt;
CC: Florian Fainelli &lt;f.fainelli@gmail.com&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
[ Upstream commit c953c764e505428f59ffe6afb1c73b89b5b1ac35 ]

Broadcom ns2 platform has spi-cpol and spi-cpho properties set
incorrectly. As per spi-slave-peripheral-prop.yaml, these properties are
of flag or boolean type and not integer type. Fix the values.

Fixes: d69dbd9f41a7c (arm64: dts: Add ARM PL022 SPI DT nodes for NS2)
Signed-off-by: Kuldeep Singh &lt;singh.kuldeep87k@gmail.com&gt;
CC: Ray Jui &lt;rjui@broadcom.com&gt;
CC: Scott Branden &lt;sbranden@broadcom.com&gt;
CC: Florian Fainelli &lt;f.fainelli@gmail.com&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</pre>
</div>
</content>
</entry>
</feed>
