<feed xmlns='http://www.w3.org/2005/Atom'>
<title>linux-stable.git/drivers/perf, branch linux-5.19.y</title>
<subtitle>Linux kernel stable tree</subtitle>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/'/>
<entry>
<title>RISC-V: Re-enable counter access from userspace</title>
<updated>2022-10-24T07:56:45+00:00</updated>
<author>
<name>Palmer Dabbelt</name>
<email>palmer@rivosinc.com</email>
</author>
<published>2022-09-28T13:18:07+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=e08302134d59b4378b7264e195406e05eb147fcb'/>
<id>e08302134d59b4378b7264e195406e05eb147fcb</id>
<content type='text'>
commit 5a5294fbe0200d1327f0e089135dad77b45aa2ee upstream.

These counters were part of the ISA when we froze the uABI, removing
them breaks userspace.

Link: https://lore.kernel.org/all/YxEhC%2FmDW1lFt36J@aurel32.net/
Fixes: e9991434596f ("RISC-V: Add perf platform driver based on SBI PMU extension")
Tested-by: Conor Dooley &lt;conor.dooley@microchip.com&gt;
Reviewed-by: Conor Dooley &lt;conor.dooley@microchip.com&gt;
Link: https://lore.kernel.org/r/20220928131807.30386-1-palmer@rivosinc.com
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt &lt;palmer@rivosinc.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 5a5294fbe0200d1327f0e089135dad77b45aa2ee upstream.

These counters were part of the ISA when we froze the uABI, removing
them breaks userspace.

Link: https://lore.kernel.org/all/YxEhC%2FmDW1lFt36J@aurel32.net/
Fixes: e9991434596f ("RISC-V: Add perf platform driver based on SBI PMU extension")
Tested-by: Conor Dooley &lt;conor.dooley@microchip.com&gt;
Reviewed-by: Conor Dooley &lt;conor.dooley@microchip.com&gt;
Link: https://lore.kernel.org/r/20220928131807.30386-1-palmer@rivosinc.com
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt &lt;palmer@rivosinc.com&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>perf/arm-cmn: Add more bits to child node address offset field</title>
<updated>2022-09-28T09:32:08+00:00</updated>
<author>
<name>Ilkka Koskinen</name>
<email>ilkka@os.amperecomputing.com</email>
</author>
<published>2022-08-08T19:54:55+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=42c7fc41020c4d1d8dc6543ce141d956f1caea87'/>
<id>42c7fc41020c4d1d8dc6543ce141d956f1caea87</id>
<content type='text'>
commit 05d6f6d346fea2fa4580a0c2b6be207456bebb08 upstream.

CMN-600 uses bits [27:0] for child node address offset while bits [30:28]
are required to be zero.

For CMN-650, the child node address offset field has been increased
to include bits [29:0] while leaving only bit 30 set to zero.

Let's include the missing two bits and assume older implementations
comply with the spec and set bits [29:28] to 0.

Signed-off-by: Ilkka Koskinen &lt;ilkka@os.amperecomputing.com&gt;
Fixes: 60d1504070c2 ("perf/arm-cmn: Support new IP features")
Reviewed-by: Robin Murphy &lt;robin.murphy@arm.com&gt;
Link: https://lore.kernel.org/r/20220808195455.79277-1-ilkka@os.amperecomputing.com
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 05d6f6d346fea2fa4580a0c2b6be207456bebb08 upstream.

CMN-600 uses bits [27:0] for child node address offset while bits [30:28]
are required to be zero.

For CMN-650, the child node address offset field has been increased
to include bits [29:0] while leaving only bit 30 set to zero.

Let's include the missing two bits and assume older implementations
comply with the spec and set bits [29:28] to 0.

Signed-off-by: Ilkka Koskinen &lt;ilkka@os.amperecomputing.com&gt;
Fixes: 60d1504070c2 ("perf/arm-cmn: Support new IP features")
Reviewed-by: Robin Murphy &lt;robin.murphy@arm.com&gt;
Link: https://lore.kernel.org/r/20220808195455.79277-1-ilkka@os.amperecomputing.com
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>perf/arm_pmu_platform: fix tests for platform_get_irq() failure</title>
<updated>2022-09-20T10:43:49+00:00</updated>
<author>
<name>Yu Zhe</name>
<email>yuzhe@nfschina.com</email>
</author>
<published>2022-08-25T01:18:44+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=719b2021d77859e7af4b247f2b70b264ae71e2c4'/>
<id>719b2021d77859e7af4b247f2b70b264ae71e2c4</id>
<content type='text'>
[ Upstream commit 6bb0d64c100091e131cd16710b62fda3319cd0af ]

The platform_get_irq() returns negative error codes.  It can't actually
return zero.

Signed-off-by: Yu Zhe &lt;yuzhe@nfschina.com&gt;
Link: https://lore.kernel.org/r/20220825011844.8536-1-yuzhe@nfschina.com
Signed-off-by: Will Deacon &lt;will@kernel.org&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 6bb0d64c100091e131cd16710b62fda3319cd0af ]

The platform_get_irq() returns negative error codes.  It can't actually
return zero.

Signed-off-by: Yu Zhe &lt;yuzhe@nfschina.com&gt;
Link: https://lore.kernel.org/r/20220825011844.8536-1-yuzhe@nfschina.com
Signed-off-by: Will Deacon &lt;will@kernel.org&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>perf: RISC-V: fix access beyond allocated array</title>
<updated>2022-09-15T08:47:10+00:00</updated>
<author>
<name>Sergey Matyukevich</name>
<email>sergey.matyukevich@syntacore.com</email>
</author>
<published>2022-08-30T15:53:04+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=24988042c561f1b6a387119bcbba42a0286a329e'/>
<id>24988042c561f1b6a387119bcbba42a0286a329e</id>
<content type='text'>
commit 20e0fbab16003ae23a9e86a64bcb93e3121587ca upstream.

SBI firmware should report total number of firmware and hardware counters
including unused ones or special ones. In this case the kernel doesn't need
to make any assumptions about gaps in reported counters, e.g. excluded timer
counter. That was fixed in OpenSBI v1.1 by commit 3f66465fb6bf ("lib: pmu:
allow to use the highest available counter"). This kernel patch has no effect
if SBI firmware behaves correctly. However it eliminates access beyond the
allocated pmu_ctr_list if the kernel is used with OpenSBI older than v1.1.

Fixes: e9991434596f ("RISC-V: Add perf platform driver based on SBI PMU extension")
Signed-off-by: Sergey Matyukevich &lt;sergey.matyukevich@syntacore.com&gt;
Reviewed-by: Atish Patra &lt;atishp@rivosinc.com&gt;
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20220830155306.301714-2-geomatsi@gmail.com
Signed-off-by: Palmer Dabbelt &lt;palmer@rivosinc.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 20e0fbab16003ae23a9e86a64bcb93e3121587ca upstream.

SBI firmware should report total number of firmware and hardware counters
including unused ones or special ones. In this case the kernel doesn't need
to make any assumptions about gaps in reported counters, e.g. excluded timer
counter. That was fixed in OpenSBI v1.1 by commit 3f66465fb6bf ("lib: pmu:
allow to use the highest available counter"). This kernel patch has no effect
if SBI firmware behaves correctly. However it eliminates access beyond the
allocated pmu_ctr_list if the kernel is used with OpenSBI older than v1.1.

Fixes: e9991434596f ("RISC-V: Add perf platform driver based on SBI PMU extension")
Signed-off-by: Sergey Matyukevich &lt;sergey.matyukevich@syntacore.com&gt;
Reviewed-by: Atish Patra &lt;atishp@rivosinc.com&gt;
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20220830155306.301714-2-geomatsi@gmail.com
Signed-off-by: Palmer Dabbelt &lt;palmer@rivosinc.com&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>drivers/perf: arm_spe: Fix consistency of SYS_PMSCR_EL1.CX</title>
<updated>2022-08-17T13:14:19+00:00</updated>
<author>
<name>Anshuman Khandual</name>
<email>anshuman.khandual@arm.com</email>
</author>
<published>2022-07-14T06:13:02+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=dc4e49f068cabdcb43ed1677a24266deecda0dbf'/>
<id>dc4e49f068cabdcb43ed1677a24266deecda0dbf</id>
<content type='text'>
[ Upstream commit 92f2b8bafa3d6e89c750e9d301a8b7ab76aaa8b6 ]

The arm_spe_pmu driver will enable SYS_PMSCR_EL1.CX in order to add CONTEXT
packets into the traces, if the owner of the perf event runs with required
capabilities i.e CAP_PERFMON or CAP_SYS_ADMIN via perfmon_capable() helper.

The value of this bit is computed in the arm_spe_event_to_pmscr() function
but the check for capabilities happens in the pmu event init callback i.e
arm_spe_pmu_event_init(). This suggests that the value of the CX bit should
remain consistent for the duration of the perf session.

However, the function arm_spe_event_to_pmscr() may be called later during
the event start callback i.e arm_spe_pmu_start() when the "current" process
is not the owner of the perf session, hence the CX bit setting is currently
not consistent.

One way to fix this, is by caching the required value of the CX bit during
the initialization of the PMU event, so that it remains consistent for the
duration of the session. It uses currently unused 'event-&gt;hw.flags' element
to cache perfmon_capable() value, which can be referred during event start
callback to compute SYS_PMSCR_EL1.CX. This ensures consistent availability
of context packets in the trace as per event owner capabilities.

Drop BIT(SYS_PMSCR_EL1_CX_SHIFT) check in arm_spe_pmu_event_init(), because
now CX bit cannot be set in arm_spe_event_to_pmscr() with perfmon_capable()
disabled.

Cc: Will Deacon &lt;will@kernel.org&gt;
Cc: Mark Rutland &lt;mark.rutland@arm.com&gt;
Cc: Alexey Budankov &lt;alexey.budankov@linux.intel.com&gt;
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Fixes: d5d9696b0380 ("drivers/perf: Add support for ARMv8.2 Statistical Profiling Extension")
Reported-by: German Gomez &lt;german.gomez@arm.com&gt;
Signed-off-by: Anshuman Khandual &lt;anshuman.khandual@arm.com&gt;
Reviewed-by: Suzuki K Poulose &lt;suzuki.poulose@arm.com&gt;
Link: https://lore.kernel.org/r/20220714061302.2715102-1-anshuman.khandual@arm.com
Signed-off-by: Will Deacon &lt;will@kernel.org&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 92f2b8bafa3d6e89c750e9d301a8b7ab76aaa8b6 ]

The arm_spe_pmu driver will enable SYS_PMSCR_EL1.CX in order to add CONTEXT
packets into the traces, if the owner of the perf event runs with required
capabilities i.e CAP_PERFMON or CAP_SYS_ADMIN via perfmon_capable() helper.

The value of this bit is computed in the arm_spe_event_to_pmscr() function
but the check for capabilities happens in the pmu event init callback i.e
arm_spe_pmu_event_init(). This suggests that the value of the CX bit should
remain consistent for the duration of the perf session.

However, the function arm_spe_event_to_pmscr() may be called later during
the event start callback i.e arm_spe_pmu_start() when the "current" process
is not the owner of the perf session, hence the CX bit setting is currently
not consistent.

One way to fix this, is by caching the required value of the CX bit during
the initialization of the PMU event, so that it remains consistent for the
duration of the session. It uses currently unused 'event-&gt;hw.flags' element
to cache perfmon_capable() value, which can be referred during event start
callback to compute SYS_PMSCR_EL1.CX. This ensures consistent availability
of context packets in the trace as per event owner capabilities.

Drop BIT(SYS_PMSCR_EL1_CX_SHIFT) check in arm_spe_pmu_event_init(), because
now CX bit cannot be set in arm_spe_event_to_pmscr() with perfmon_capable()
disabled.

Cc: Will Deacon &lt;will@kernel.org&gt;
Cc: Mark Rutland &lt;mark.rutland@arm.com&gt;
Cc: Alexey Budankov &lt;alexey.budankov@linux.intel.com&gt;
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Fixes: d5d9696b0380 ("drivers/perf: Add support for ARMv8.2 Statistical Profiling Extension")
Reported-by: German Gomez &lt;german.gomez@arm.com&gt;
Signed-off-by: Anshuman Khandual &lt;anshuman.khandual@arm.com&gt;
Reviewed-by: Suzuki K Poulose &lt;suzuki.poulose@arm.com&gt;
Link: https://lore.kernel.org/r/20220714061302.2715102-1-anshuman.khandual@arm.com
Signed-off-by: Will Deacon &lt;will@kernel.org&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>perf: RISC-V: Add of_node_put() when breaking out of for_each_of_cpu_node()</title>
<updated>2022-08-17T13:14:19+00:00</updated>
<author>
<name>Liang He</name>
<email>windhl@126.com</email>
</author>
<published>2022-07-15T13:03:30+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=ddb603a99fa0b615982baec43b5caa59c8e5eb57'/>
<id>ddb603a99fa0b615982baec43b5caa59c8e5eb57</id>
<content type='text'>
[ Upstream commit 491f10d08fdae10a177edf6af4f43b83b293114b ]

In pmu_sbi_setup_irqs(), we should call of_node_put() for the 'cpu'
when breaking out of for_each_of_cput_node() as its refcount will
be automatically increased and decreased during the iteration.

Fixes: 4905ec2fb7e6 ("RISC-V: Add sscofpmf extension support")
Signed-off-by: Liang He &lt;windhl@126.com&gt;
Reviewed-by: Atish Patra &lt;atishp@rivosinc.com&gt;
Reviewed-by: Andrew Jones &lt;ajones@ventanamicro.com&gt;
Link: https://lore.kernel.org/r/20220715130330.443363-1-windhl@126.com
Signed-off-by: Will Deacon &lt;will@kernel.org&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 491f10d08fdae10a177edf6af4f43b83b293114b ]

In pmu_sbi_setup_irqs(), we should call of_node_put() for the 'cpu'
when breaking out of for_each_of_cput_node() as its refcount will
be automatically increased and decreased during the iteration.

Fixes: 4905ec2fb7e6 ("RISC-V: Add sscofpmf extension support")
Signed-off-by: Liang He &lt;windhl@126.com&gt;
Reviewed-by: Atish Patra &lt;atishp@rivosinc.com&gt;
Reviewed-by: Andrew Jones &lt;ajones@ventanamicro.com&gt;
Link: https://lore.kernel.org/r/20220715130330.443363-1-windhl@126.com
Signed-off-by: Will Deacon &lt;will@kernel.org&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>RISC-V: Update user page mapping only once during start</title>
<updated>2022-08-17T13:13:50+00:00</updated>
<author>
<name>Atish Patra</name>
<email>atishp@rivosinc.com</email>
</author>
<published>2022-07-11T17:46:29+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=099e15195daeafb0bd4912ff77844a9b21f0a1eb'/>
<id>099e15195daeafb0bd4912ff77844a9b21f0a1eb</id>
<content type='text'>
commit 133a6d1fe7d7ad8393af025c4dde379c0616661f upstream.

Currently, riscv_pmu_event_set_period updates the userpage mapping.
However, the caller of riscv_pmu_event_set_period should update
the userpage mapping because the counter can not be updated/started
from set_period function in counter overflow path.

Invoke the perf_event_update_userpage at the caller so that it
doesn't get invoked twice during counter start path.

Fixes: f5bfa23f576f ("RISC-V: Add a perf core library for pmu drivers")
Reviewed-by: Anup Patel &lt;anup@brainfault.org&gt;
Signed-off-by: Atish Patra &lt;atishp@rivosinc.com&gt;
Reviewed-by: Guo Ren &lt;guoren@kernel.org&gt;
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20220711174632.4186047-3-atishp@rivosinc.com
Signed-off-by: Palmer Dabbelt &lt;palmer@rivosinc.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 133a6d1fe7d7ad8393af025c4dde379c0616661f upstream.

Currently, riscv_pmu_event_set_period updates the userpage mapping.
However, the caller of riscv_pmu_event_set_period should update
the userpage mapping because the counter can not be updated/started
from set_period function in counter overflow path.

Invoke the perf_event_update_userpage at the caller so that it
doesn't get invoked twice during counter start path.

Fixes: f5bfa23f576f ("RISC-V: Add a perf core library for pmu drivers")
Reviewed-by: Anup Patel &lt;anup@brainfault.org&gt;
Signed-off-by: Atish Patra &lt;atishp@rivosinc.com&gt;
Reviewed-by: Guo Ren &lt;guoren@kernel.org&gt;
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20220711174632.4186047-3-atishp@rivosinc.com
Signed-off-by: Palmer Dabbelt &lt;palmer@rivosinc.com&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>RISC-V: Fix SBI PMU calls for RV32</title>
<updated>2022-08-17T13:13:50+00:00</updated>
<author>
<name>Atish Patra</name>
<email>atishp@rivosinc.com</email>
</author>
<published>2022-07-11T17:46:30+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=fcc37c9de0ed6d078d94df4a7acde1075bcc5a1f'/>
<id>fcc37c9de0ed6d078d94df4a7acde1075bcc5a1f</id>
<content type='text'>
commit 0209b5830bea42dd3ce33ab0397231e67ec3b751 upstream.

Some of the SBI PMU calls does not pass 64bit arguments
correctly and not under RV32 compile time flags. Currently,
this doesn't create any incorrect results as RV64 ignores
any value in the additional register and qemu doesn't support
raw events.

Fix those SBI calls in order to set correct values for RV32.

Fixes: e9991434596f ("RISC-V: Add perf platform driver based on SBI PMU extension")
Signed-off-by: Atish Patra &lt;atishp@rivosinc.com&gt;
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20220711174632.4186047-4-atishp@rivosinc.com
Signed-off-by: Palmer Dabbelt &lt;palmer@rivosinc.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 0209b5830bea42dd3ce33ab0397231e67ec3b751 upstream.

Some of the SBI PMU calls does not pass 64bit arguments
correctly and not under RV32 compile time flags. Currently,
this doesn't create any incorrect results as RV64 ignores
any value in the additional register and qemu doesn't support
raw events.

Fix those SBI calls in order to set correct values for RV32.

Fixes: e9991434596f ("RISC-V: Add perf platform driver based on SBI PMU extension")
Signed-off-by: Atish Patra &lt;atishp@rivosinc.com&gt;
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20220711174632.4186047-4-atishp@rivosinc.com
Signed-off-by: Palmer Dabbelt &lt;palmer@rivosinc.com&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>RISC-V: Fix counter restart during overflow for RV32</title>
<updated>2022-08-17T13:13:50+00:00</updated>
<author>
<name>Atish Patra</name>
<email>atishp@rivosinc.com</email>
</author>
<published>2022-07-11T17:46:28+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=a775c75190ffedc6f69c144b737cc860a8588e83'/>
<id>a775c75190ffedc6f69c144b737cc860a8588e83</id>
<content type='text'>
commit acc1b919f47926b089be21b8aaa29ec91fef0aa2 upstream.

Pass the upper half of the initial value of the counter correctly
for RV32.

Fixes: 4905ec2fb7e6 ("RISC-V: Add sscofpmf extension support")
Signed-off-by: Atish Patra &lt;atishp@rivosinc.com&gt;
Reviewed-by: Guo Ren &lt;guoren@kernel.org&gt;
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20220711174632.4186047-2-atishp@rivosinc.com
Signed-off-by: Palmer Dabbelt &lt;palmer@rivosinc.com&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
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commit acc1b919f47926b089be21b8aaa29ec91fef0aa2 upstream.

Pass the upper half of the initial value of the counter correctly
for RV32.

Fixes: 4905ec2fb7e6 ("RISC-V: Add sscofpmf extension support")
Signed-off-by: Atish Patra &lt;atishp@rivosinc.com&gt;
Reviewed-by: Guo Ren &lt;guoren@kernel.org&gt;
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20220711174632.4186047-2-atishp@rivosinc.com
Signed-off-by: Palmer Dabbelt &lt;palmer@rivosinc.com&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
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<entry>
<title>Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux</title>
<updated>2022-05-24T04:06:11+00:00</updated>
<author>
<name>Linus Torvalds</name>
<email>torvalds@linux-foundation.org</email>
</author>
<published>2022-05-24T04:06:11+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=143a6252e1b8ab424b4b293512a97cca7295c182'/>
<id>143a6252e1b8ab424b4b293512a97cca7295c182</id>
<content type='text'>
Pull arm64 updates from Catalin Marinas:

 - Initial support for the ARMv9 Scalable Matrix Extension (SME).

   SME takes the approach used for vectors in SVE and extends this to
   provide architectural support for matrix operations. No KVM support
   yet, SME is disabled in guests.

 - Support for crashkernel reservations above ZONE_DMA via the
   'crashkernel=X,high' command line option.

 - btrfs search_ioctl() fix for live-lock with sub-page faults.

 - arm64 perf updates: support for the Hisilicon "CPA" PMU for
   monitoring coherent I/O traffic, support for Arm's CMN-650 and
   CMN-700 interconnect PMUs, minor driver fixes, kerneldoc cleanup.

 - Kselftest updates for SME, BTI, MTE.

 - Automatic generation of the system register macros from a 'sysreg'
   file describing the register bitfields.

 - Update the type of the function argument holding the ESR_ELx register
   value to unsigned long to match the architecture register size
   (originally 32-bit but extended since ARMv8.0).

 - stacktrace cleanups.

 - ftrace cleanups.

 - Miscellaneous updates, most notably: arm64-specific huge_ptep_get(),
   avoid executable mappings in kexec/hibernate code, drop TLB flushing
   from get_clear_flush() (and rename it to get_clear_contig()),
   ARCH_NR_GPIO bumped to 2048 for ARCH_APPLE.

* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (145 commits)
  arm64/sysreg: Generate definitions for FAR_ELx
  arm64/sysreg: Generate definitions for DACR32_EL2
  arm64/sysreg: Generate definitions for CSSELR_EL1
  arm64/sysreg: Generate definitions for CPACR_ELx
  arm64/sysreg: Generate definitions for CONTEXTIDR_ELx
  arm64/sysreg: Generate definitions for CLIDR_EL1
  arm64/sve: Move sve_free() into SVE code section
  arm64: Kconfig.platforms: Add comments
  arm64: Kconfig: Fix indentation and add comments
  arm64: mm: avoid writable executable mappings in kexec/hibernate code
  arm64: lds: move special code sections out of kernel exec segment
  arm64/hugetlb: Implement arm64 specific huge_ptep_get()
  arm64/hugetlb: Use ptep_get() to get the pte value of a huge page
  arm64: kdump: Do not allocate crash low memory if not needed
  arm64/sve: Generate ZCR definitions
  arm64/sme: Generate defintions for SVCR
  arm64/sme: Generate SMPRI_EL1 definitions
  arm64/sme: Automatically generate SMPRIMAP_EL2 definitions
  arm64/sme: Automatically generate SMIDR_EL1 defines
  arm64/sme: Automatically generate defines for SMCR
  ...
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<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Pull arm64 updates from Catalin Marinas:

 - Initial support for the ARMv9 Scalable Matrix Extension (SME).

   SME takes the approach used for vectors in SVE and extends this to
   provide architectural support for matrix operations. No KVM support
   yet, SME is disabled in guests.

 - Support for crashkernel reservations above ZONE_DMA via the
   'crashkernel=X,high' command line option.

 - btrfs search_ioctl() fix for live-lock with sub-page faults.

 - arm64 perf updates: support for the Hisilicon "CPA" PMU for
   monitoring coherent I/O traffic, support for Arm's CMN-650 and
   CMN-700 interconnect PMUs, minor driver fixes, kerneldoc cleanup.

 - Kselftest updates for SME, BTI, MTE.

 - Automatic generation of the system register macros from a 'sysreg'
   file describing the register bitfields.

 - Update the type of the function argument holding the ESR_ELx register
   value to unsigned long to match the architecture register size
   (originally 32-bit but extended since ARMv8.0).

 - stacktrace cleanups.

 - ftrace cleanups.

 - Miscellaneous updates, most notably: arm64-specific huge_ptep_get(),
   avoid executable mappings in kexec/hibernate code, drop TLB flushing
   from get_clear_flush() (and rename it to get_clear_contig()),
   ARCH_NR_GPIO bumped to 2048 for ARCH_APPLE.

* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (145 commits)
  arm64/sysreg: Generate definitions for FAR_ELx
  arm64/sysreg: Generate definitions for DACR32_EL2
  arm64/sysreg: Generate definitions for CSSELR_EL1
  arm64/sysreg: Generate definitions for CPACR_ELx
  arm64/sysreg: Generate definitions for CONTEXTIDR_ELx
  arm64/sysreg: Generate definitions for CLIDR_EL1
  arm64/sve: Move sve_free() into SVE code section
  arm64: Kconfig.platforms: Add comments
  arm64: Kconfig: Fix indentation and add comments
  arm64: mm: avoid writable executable mappings in kexec/hibernate code
  arm64: lds: move special code sections out of kernel exec segment
  arm64/hugetlb: Implement arm64 specific huge_ptep_get()
  arm64/hugetlb: Use ptep_get() to get the pte value of a huge page
  arm64: kdump: Do not allocate crash low memory if not needed
  arm64/sve: Generate ZCR definitions
  arm64/sme: Generate defintions for SVCR
  arm64/sme: Generate SMPRI_EL1 definitions
  arm64/sme: Automatically generate SMPRIMAP_EL2 definitions
  arm64/sme: Automatically generate SMIDR_EL1 defines
  arm64/sme: Automatically generate defines for SMCR
  ...
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