| Age | Commit message (Collapse) | Author |
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_exception can be called by machine check handlers when the MCE hits
user code (e.g., pseries and powernv). This will enable local irqs
because, which is a dicey thing to do in NMI or hard irq context.
This seemed to worked out okay because a userspace MCE can basically be
treated like a synchronous interrupt (after async / imprecise MCEs are
filtered out). Since NMI and hard irq handlers have started growing
nmi_enter / irq_enter, and more irq state sanity checks, this has
started to cause problems (or at least trigger warnings).
The Fixes tag to the commit which introduced this rather than try to
work out exactly which commit was the first that could possibly cause a
problem because that may be difficult to prove.
Fixes: 9f2f79e3a3c1 ("powerpc: Disable interrupts in 64-bit kernel FP and vector faults")
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211004145642.1331214-3-npiggin@gmail.com
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Emergency stack path was jumping into a 3: label inside the
__GEN_COMMON_BODY macro for the normal path after it had finished,
rather than jumping over it. By a small miracle this is the correct
place to build up a new interrupt frame with the existing stack
pointer, so things basically worked okay with an added weird looking
700 trap frame on top (which had the wrong ->nip so it didn't decode
bug messages either).
Fix this by avoiding using numeric labels when jumping over non-trivial
macros.
Before:
LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=2048 NUMA PowerNV
Modules linked in:
CPU: 0 PID: 88 Comm: sh Not tainted 5.15.0-rc2-00034-ge057cdade6e5 #2637
NIP: 7265677368657265 LR: c00000000006c0c8 CTR: c0000000000097f0
REGS: c0000000fffb3a50 TRAP: 0700 Not tainted
MSR: 9000000000021031 <SF,HV,ME,IR,DR,LE> CR: 00000700 XER: 20040000
CFAR: c0000000000098b0 IRQMASK: 0
GPR00: c00000000006c964 c0000000fffb3cf0 c000000001513800 0000000000000000
GPR04: 0000000048ab0778 0000000042000000 0000000000000000 0000000000001299
GPR08: 000001e447c718ec 0000000022424282 0000000000002710 c00000000006bee8
GPR12: 9000000000009033 c0000000016b0000 00000000000000b0 0000000000000001
GPR16: 0000000000000000 0000000000000002 0000000000000000 0000000000000ff8
GPR20: 0000000000001fff 0000000000000007 0000000000000080 00007fff89d90158
GPR24: 0000000002000000 0000000002000000 0000000000000255 0000000000000300
GPR28: c000000001270000 0000000042000000 0000000048ab0778 c000000080647e80
NIP [7265677368657265] 0x7265677368657265
LR [c00000000006c0c8] ___do_page_fault+0x3f8/0xb10
Call Trace:
[c0000000fffb3cf0] [c00000000000bdac] soft_nmi_common+0x13c/0x1d0 (unreliable)
--- interrupt: 700 at decrementer_common_virt+0xb8/0x230
NIP: c0000000000098b8 LR: c00000000006c0c8 CTR: c0000000000097f0
REGS: c0000000fffb3d60 TRAP: 0700 Not tainted
MSR: 9000000000021031 <SF,HV,ME,IR,DR,LE> CR: 22424282 XER: 20040000
CFAR: c0000000000098b0 IRQMASK: 0
GPR00: c00000000006c964 0000000000002400 c000000001513800 0000000000000000
GPR04: 0000000048ab0778 0000000042000000 0000000000000000 0000000000001299
GPR08: 000001e447c718ec 0000000022424282 0000000000002710 c00000000006bee8
GPR12: 9000000000009033 c0000000016b0000 00000000000000b0 0000000000000001
GPR16: 0000000000000000 0000000000000002 0000000000000000 0000000000000ff8
GPR20: 0000000000001fff 0000000000000007 0000000000000080 00007fff89d90158
GPR24: 0000000002000000 0000000002000000 0000000000000255 0000000000000300
GPR28: c000000001270000 0000000042000000 0000000048ab0778 c000000080647e80
NIP [c0000000000098b8] decrementer_common_virt+0xb8/0x230
LR [c00000000006c0c8] ___do_page_fault+0x3f8/0xb10
--- interrupt: 700
Instruction dump:
XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
---[ end trace 6d28218e0cc3c949 ]---
After:
------------[ cut here ]------------
kernel BUG at arch/powerpc/kernel/exceptions-64s.S:491!
Oops: Exception in kernel mode, sig: 5 [#1]
LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=2048 NUMA PowerNV
Modules linked in:
CPU: 0 PID: 88 Comm: login Not tainted 5.15.0-rc2-00034-ge057cdade6e5-dirty #2638
NIP: c0000000000098b8 LR: c00000000006bf04 CTR: c0000000000097f0
REGS: c0000000fffb3d60 TRAP: 0700 Not tainted
MSR: 9000000000021031 <SF,HV,ME,IR,DR,LE> CR: 24482227 XER: 00040000
CFAR: c0000000000098b0 IRQMASK: 0
GPR00: c00000000006bf04 0000000000002400 c000000001513800 c000000001271868
GPR04: 00000000100f0d29 0000000042000000 0000000000000007 0000000000000009
GPR08: 00000000100f0d29 0000000024482227 0000000000002710 c000000000181b3c
GPR12: 9000000000009033 c0000000016b0000 00000000100f0d29 c000000005b22f00
GPR16: 00000000ffff0000 0000000000000001 0000000000000009 00000000100eed90
GPR20: 00000000100eed90 0000000010000000 000000001000a49c 00000000100f1430
GPR24: c000000001271868 0000000002000000 0000000000000215 0000000000000300
GPR28: c000000001271800 0000000042000000 00000000100f0d29 c000000080647860
NIP [c0000000000098b8] decrementer_common_virt+0xb8/0x230
LR [c00000000006bf04] ___do_page_fault+0x234/0xb10
Call Trace:
Instruction dump:
4182000c 39400001 48000008 894d0932 714a0001 39400008 408225fc 718a4000
7c2a0b78 3821fcf0 41c20008 e82d0910 <0981fcf0> f92101a0 f9610170 f9810178
---[ end trace a5dbd1f5ea4ccc51 ]---
Fixes: 0a882e28468f4 ("powerpc/64s/exception: remove bad stack branch")
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211004145642.1331214-2-npiggin@gmail.com
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Special case handling of the smallest 32-bit negative number for BPF_SUB.
Fixes: 51c66ad849a703 ("powerpc/bpf: Implement extended BPF on PPC32")
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/7135360a0cdf70adedbccf9863128b8daef18764.1633464148.git.naveen.n.rao@linux.vnet.ibm.com
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Suppress emitting zero extend instruction for 64-bit BPF_END_FROM_[L|B]E
operation.
Fixes: 51c66ad849a703 ("powerpc/bpf: Implement extended BPF on PPC32")
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/b4e3c3546121315a8e2059b19a1bda84971816e4.1633464148.git.naveen.n.rao@linux.vnet.ibm.com
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'andi' only takes an unsigned 16-bit value. Correct the imm range used
when emitting andi.
Fixes: 51c66ad849a703 ("powerpc/bpf: Implement extended BPF on PPC32")
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/b94489f52831305ec15aca4dd04a3527236be7e8.1633464148.git.naveen.n.rao@linux.vnet.ibm.com
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Correct the destination register used for ALU32 BPF_ARSH operation.
Fixes: 51c66ad849a703 ("powerpc/bpf: Implement extended BPF on PPC32")
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/6d24c1f9e79b6f61f5135eaf2ea1e8bcd4dac87b.1633464148.git.naveen.n.rao@linux.vnet.ibm.com
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Emit similar instruction sequences to commit a048a07d7f4535
("powerpc/64s: Add support for a store forwarding barrier at kernel
entry/exit") when encountering BPF_NOSPEC.
Mitigations are enabled depending on what the firmware advertises. In
particular, we do not gate these mitigations based on current settings,
just like in x86. Due to this, we don't need to take any action if
mitigations are enabled or disabled at runtime.
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/956570cbc191cd41f8274bed48ee757a86dac62a.1633464148.git.naveen.n.rao@linux.vnet.ibm.com
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Add a helper to return the stf_barrier type for the current processor.
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/3bd5d7f96ea1547991ac2ce3137dc2b220bae285.1633464148.git.naveen.n.rao@linux.vnet.ibm.com
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We aren't handling subtraction involving an immediate value of
0x80000000 properly. Fix the same.
Fixes: 156d0e290e969c ("powerpc/ebpf/jit: Implement JIT compiler for extended BPF")
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
[mpe: Fold in fix from Naveen to use imm <= 32768]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/fc4b1276eb10761fd7ce0814c8dd089da2815251.1633464148.git.naveen.n.rao@linux.vnet.ibm.com
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Add usb product id of the Quectel EC200S-CN module.
usb-devices output for 0x6002:
T: Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 3 Spd=480 MxCh= 0
D: Ver= 2.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs= 1
P: Vendor=2c7c ProdID=6002 Rev=03.18
S: Manufacturer=Android
S: Product=Android
S: SerialNumber=0000
C: #Ifs= 5 Cfg#= 1 Atr=e0 MxPwr=500mA
I: If#=0x0 Alt= 0 #EPs= 1 Cls=02(commc) Sub=06 Prot=00 Driver=cdc_ether
I: If#=0x1 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=cdc_ether
I: If#=0x2 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=(none)
I: If#=0x3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=(none)
I: If#=0x4 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=(none)
Signed-off-by: Yu-Tung Chang <mtwget@gmail.com>
Link: https://lore.kernel.org/r/20210930021112.330396-1-mtwget@gmail.com
Cc: stable@vger.kernel.org
Signed-off-by: Johan Hovold <johan@kernel.org>
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Adding support for Quectel EG91 LTE module.
The interface layout is same as for EG95.
usb-devices output:
T: Bus=01 Lev=02 Prnt=02 Port=00 Cnt=01 Dev#= 3 Spd=480 MxCh= 0
D: Ver= 2.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs= 1
P: Vendor=2c7c ProdID=0191 Rev=03.18
S: Manufacturer=Android
S: Product=Android
C: #Ifs= 5 Cfg#= 1 Atr=a0 MxPwr=500mA
I: If#=0x0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
I: If#=0x1 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=(none)
I: If#=0x2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=(none)
I: If#=0x3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=(none)
I: If#=0x4 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=qmi_wwan
Interfaces:
0: Diag
1: GNSS
2: AT-command interface/modem
3: Modem
4: QMI
Signed-off-by: Tomaz Solc <tomaz.solc@tablix.org>
Cc: stable@vger.kernel.org
Signed-off-by: Johan Hovold <johan@kernel.org>
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Only ignore the operation if dividing by 1.
Fixes: 156d0e290e969c ("powerpc/ebpf/jit: Implement JIT compiler for extended BPF")
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Tested-by: Johan Almbladh <johan.almbladh@anyfinetworks.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Acked-by: Song Liu <songliubraving@fb.com>
Acked-by: Johan Almbladh <johan.almbladh@anyfinetworks.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/c674ca18c3046885602caebb326213731c675d06.1633464148.git.naveen.n.rao@linux.vnet.ibm.com
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Add checks to ensure that we never emit branch instructions with
truncated branch offsets.
Suggested-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Tested-by: Johan Almbladh <johan.almbladh@anyfinetworks.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Acked-by: Song Liu <songliubraving@fb.com>
Acked-by: Johan Almbladh <johan.almbladh@anyfinetworks.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/71d33a6b7603ec1013c9734dd8bdd4ff5e929142.1633464148.git.naveen.n.rao@linux.vnet.ibm.com
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Add a helper to check if a given offset is within the branch range for a
powerpc conditional branch instruction, and update some sites to use the
new helper.
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Acked-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/442b69a34ced32ca346a0d9a855f3f6cfdbbbd41.1633464148.git.naveen.n.rao@linux.vnet.ibm.com
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Add the following Telit LE910Cx composition:
0x1204: tty, adb, mbim, tty, tty, tty, tty
Signed-off-by: Daniele Palmas <dnlplm@gmail.com>
Link: https://lore.kernel.org/r/20211004105655.8515-1-dnlplm@gmail.com
Cc: stable@vger.kernel.org
Signed-off-by: Johan Hovold <johan@kernel.org>
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It seems that a few recent AMD systems show the codec configuration
errors at the early boot, while loading the driver at a later stage
works magically. Although the root cause of the error isn't clear,
it's certainly not bad to allow retrying the codec probe in such a
case if that helps.
This patch adds the capability for retrying the probe upon codec probe
errors on the certain AMD platforms. The probe_work is changed to a
delayed work, and at the secondary call, it'll jump to the codec
probing.
Note that, not only adding the re-probing, this includes the behavior
changes in the codec configuration function. Namely,
snd_hda_codec_configure() won't unregister the codec at errors any
longer. Instead, its caller, azx_codec_configure() unregisters the
codecs with the probe failures *if* any codec has been successfully
configured. If all codec probe failed, it doesn't unregister but let
it re-probed -- which is the most case we're seeing and this patch
tries to improve.
Even if the driver doesn't re-probe or give up, it will go to the
"free-all" error path, hence the leftover codecs shall be disabled /
deleted in anyway.
BugLink: https://bugzilla.suse.com/show_bug.cgi?id=1190801
Link: https://lore.kernel.org/r/20211006141940.2897-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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The libelf implementation from elftoolchain has a safety check in
gelf_update_rel[a] to check that the data corresponds to a section
that has type SHT_REL[A] [0]. If the relocation is updated before
the section header is updated with the proper type, this check
fails.
To fix this, update the section header first, before the relocations.
Previously, the section size was calculated in elf_rebuild_reloc_section
by counting the number of entries in the reloc_list. However, we
now need the size during elf_write so instead keep a running total
and add to it for every new relocation.
[0] https://sourceforge.net/p/elftoolchain/mailman/elftoolchain-developers/thread/CAGw6cBtkZro-8wZMD2ULkwJ39J+tHtTtAWXufMjnd3cQ7XG54g@mail.gmail.com/
Signed-off-by: Michael Forney <mforney@mforney.org>
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Link: https://lore.kernel.org/r/20210509000103.11008-2-mforney@mforney.org
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Otherwise, if these fail we end up with garbage data in the
.rela.orc_unwind_ip section, leading to errors like
ld: fs/squashfs/namei.o: bad reloc symbol index (0x7f16 >= 0x12) for offset 0x7f16d5c82cc8 in section `.orc_unwind_ip'
Signed-off-by: Michael Forney <mforney@mforney.org>
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Link: https://lore.kernel.org/r/20210509000103.11008-1-mforney@mforney.org
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git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux
Pull devicetree fixes from Rob Herring:
- Add another allowed address for TI sn65dsi86
- Drop more redundant minItems/maxItems
- Fix more graph 'unevaluatedProperties' warnings in media bindings
* tag 'devicetree-fixes-for-5.15-3' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
dt-bindings: drm/bridge: ti-sn65dsi86: Fix reg value
dt-bindings: Drop more redundant 'maxItems/minItems'
dt-bindings: media: Fix more graph 'unevaluatedProperties' related warnings
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Russell King says:
====================
Add mdiobus_modify_changed() helper
Sean Anderson's recent patch series is introducing more read-write
operations on the MDIO bus that only need to happen if a change is
being made.
We have similar logic in __mdiobus_modify_changed(), but we didn't
add its correponding locked variant mdiobus_modify_changed() as we
had very few users. Now that we are getting more, let's add the
helper.
====================
Link: https://lore.kernel.org/r/YV2UIa2eU+UjmWaE@shell.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Use the mdiobus_modify_changed() helper in the C22 PCS advertisement
helper.
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Add mdiobus_modify_changed() helper to reflect the phylib and similar
equivalents. This will avoid this functionality being open-coded, as
has already happened in phylink, and it looks like other users will be
appearing soon.
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Ido Schimmel says:
====================
ethtool: Add ability to control transceiver modules' power mode
This patchset extends the ethtool netlink API to allow user space to
control transceiver modules. Two specific APIs are added, but the plan
is to extend the interface with more APIs in the future (see "Future
plans").
This submission is a complete rework of a previous submission [1] that
tried to achieve the same goal by allowing user space to write to the
EEPROMs of these modules. It was rejected as it could have enabled user
space binary blob drivers.
However, the main issue is that by directly writing to some pages of
these EEPROMs, we are interfering with the entity that is controlling
the modules (kernel / device firmware). In addition, some functionality
cannot be implemented solely by writing to the EEPROM, as it requires
the assertion / de-assertion of hardware signals (e.g., "ResetL" pin in
SFF-8636).
Motivation
==========
The kernel can currently dump the contents of module EEPROMs to user
space via the ethtool legacy ioctl API or the new netlink API. These
dumps can then be parsed by ethtool(8) according to the specification
that defines the memory map of the EEPROM. For example, SFF-8636 [2] for
QSFP and CMIS [3] for QSFP-DD.
In addition to read-only elements, these specifications also define
writeable elements that can be used to control the behavior of the
module. For example, controlling whether the module is put in low or
high power mode to limit its power consumption.
The CMIS specification even defines a message exchange mechanism (CDB,
Command Data Block) on top of the module's memory map. This allows the
host to send various commands to the module. For example, to update its
firmware.
Implementation
==============
The ethtool netlink API is extended with two new messages,
'ETHTOOL_MSG_MODULE_SET' and 'ETHTOOL_MSG_MODULE_GET', that allow user
space to set and get transceiver module parameters. Specifically, the
'ETHTOOL_A_MODULE_POWER_MODE_POLICY' attribute allows user space to
control the power mode policy of the module in order to limit its power
consumption. See detailed description in patch #1.
The user API is designed to be generic enough so that it could be used
for modules with different memory maps (e.g., SFF-8636, CMIS).
The only implementation of the device driver API in this series is for a
MAC driver (mlxsw) where the module is controlled by the device's
firmware, but it is designed to be generic enough so that it could also
be used by implementations where the module is controlled by the kernel.
Testing and introspection
=========================
See detailed description in patches #1 and #5.
Patchset overview
=================
Patch #1 adds the initial infrastructure in ethtool along with the
ability to control transceiver modules' power mode.
Patches #2-#3 add required device registers in mlxsw.
Patch #4 implements in mlxsw the ethtool operations added in patch #1.
Patch #5 adds extended link states in order to allow user space to
troubleshoot link down issues related to transceiver modules.
Patch #6 adds support for these extended states in mlxsw.
Future plans
============
* Extend 'ETHTOOL_MSG_MODULE_SET' to control Tx output among other
attributes.
* Add new ethtool message(s) to update firmware on transceiver modules.
* Extend ethtool(8) to parse more diagnostic information from CMIS
modules. No kernel changes required.
[1] https://lore.kernel.org/netdev/20210623075925.2610908-1-idosch@idosch.org/
[2] https://members.snia.org/document/dl/26418
[3] http://www.qsfp-dd.com/wp-content/uploads/2021/05/CMIS5p0.pdf
Previous versions:
[4] https://lore.kernel.org/netdev/20211003073219.1631064-1-idosch@idosch.org/
[5] https://lore.kernel.org/netdev/20210824130344.1828076-1-idosch@idosch.org/
[6] https://lore.kernel.org/netdev/20210818155202.1278177-1-idosch@idosch.org/
[7] https://lore.kernel.org/netdev/20210809102152.719961-1-idosch@idosch.org/
====================
Link: https://lore.kernel.org/r/20211006104647.2357115-1-idosch@idosch.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Add support for the transceiver module extended state and sub-state
added in previous patch. The extended state is meant to describe link
issues related to transceiver modules.
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Add an extended state and sub-state to describe link issues related to
transceiver modules.
The 'ETHTOOL_LINK_EXT_SUBSTATE_MODULE_CMIS_NOT_READY' extended sub-state
tells user space that port is unable to gain a carrier because the CMIS
Module State Machine did not reach the ModuleReady (Fully Operational)
state. For example, if the module is stuck at ModuleLowPwr or
ModuleFault state. In case of the latter, user space can read the fault
reason from the module's EEPROM and potentially reset it.
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
|
Implement support for ethtool_ops::.get_module_power_mode and
ethtool_ops::set_module_power_mode.
The get operation is implemented using the Management Cable IO and
Notifications (MCION) register that reports the operational power mode
of the module and its presence. In case a module is not present, its
operational power mode is not reported to ethtool and user space. If not
set before, the power mode policy is reported as "high", which is the
default on Mellanox systems.
The set operation is implemented using the Port Module Memory Map
Properties (PMMP) register. The register instructs the device's firmware
to transition a plugged-in module to / out of low power mode by writing
to its memory map.
When the power mode policy is set to 'auto', a module will not
transition to low power mode as long as any ports using it are
administratively up. Example:
# devlink port split swp11 count 4
# ethtool --set-module swp11s0 power-mode-policy auto
$ ethtool --show-module swp11s0
Module parameters for swp11s0:
power-mode-policy auto
power-mode low
# ip link set dev swp11s0 up
# ip link set dev swp11s1 up
$ ethtool --show-module swp11s0
Module parameters for swp11s0:
power-mode-policy auto
power-mode high
# ip link set dev swp11s1 down
$ ethtool --show-module swp11s0
Module parameters for swp11s0:
power-mode-policy auto
power-mode high
# ip link set dev swp11s0 down
$ ethtool --show-module swp11s0
Module parameters for swp11s0:
power-mode-policy auto
power-mode low
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
|
Add the Management Cable IO and Notifications register. It will be used
to retrieve the power mode status of a module in subsequent patches and
whether a module is present in a cage or not.
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
|
Add the Port Module Memory Map Properties register. It will be used to
set the power mode of a module in subsequent patches.
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
|
Add a pair of new ethtool messages, 'ETHTOOL_MSG_MODULE_SET' and
'ETHTOOL_MSG_MODULE_GET', that can be used to control transceiver
modules parameters and retrieve their status.
The first parameter to control is the power mode of the module. It is
only relevant for paged memory modules, as flat memory modules always
operate in low power mode.
When a paged memory module is in low power mode, its power consumption
is reduced to the minimum, the management interface towards the host is
available and the data path is deactivated.
User space can choose to put modules that are not currently in use in
low power mode and transition them to high power mode before putting the
associated ports administratively up. This is useful for user space that
favors reduced power consumption and lower temperatures over reduced
link up times. In QSFP-DD modules the transition from low power mode to
high power mode can take a few seconds and this transition is only
expected to get longer with future / more complex modules.
User space can control the power mode of the module via the power mode
policy attribute ('ETHTOOL_A_MODULE_POWER_MODE_POLICY'). Possible
values:
* high: Module is always in high power mode.
* auto: Module is transitioned by the host to high power mode when the
first port using it is put administratively up and to low power mode
when the last port using it is put administratively down.
The operational power mode of the module is available to user space via
the 'ETHTOOL_A_MODULE_POWER_MODE' attribute. The attribute is not
reported to user space when a module is not plugged-in.
The user API is designed to be generic enough so that it could be used
for modules with different memory maps (e.g., SFF-8636, CMIS).
The only implementation of the device driver API in this series is for a
MAC driver (mlxsw) where the module is controlled by the device's
firmware, but it is designed to be generic enough so that it could also
be used by implementations where the module is controlled by the CPU.
CMIS testing
============
# ethtool -m swp11
Identifier : 0x18 (QSFP-DD Double Density 8X Pluggable Transceiver (INF-8628))
...
Module State : 0x03 (ModuleReady)
LowPwrAllowRequestHW : Off
LowPwrRequestSW : Off
The module is not in low power mode, as it is not forced by hardware
(LowPwrAllowRequestHW is off) or by software (LowPwrRequestSW is off).
The power mode can be queried from the kernel. In case
LowPwrAllowRequestHW was on, the kernel would need to take into account
the state of the LowPwrRequestHW signal, which is not visible to user
space.
$ ethtool --show-module swp11
Module parameters for swp11:
power-mode-policy high
power-mode high
Change the power mode policy to 'auto':
# ethtool --set-module swp11 power-mode-policy auto
Query the power mode again:
$ ethtool --show-module swp11
Module parameters for swp11:
power-mode-policy auto
power-mode low
Verify with the data read from the EEPROM:
# ethtool -m swp11
Identifier : 0x18 (QSFP-DD Double Density 8X Pluggable Transceiver (INF-8628))
...
Module State : 0x01 (ModuleLowPwr)
LowPwrAllowRequestHW : Off
LowPwrRequestSW : On
Put the associated port administratively up which will instruct the host
to transition the module to high power mode:
# ip link set dev swp11 up
Query the power mode again:
$ ethtool --show-module swp11
Module parameters for swp11:
power-mode-policy auto
power-mode high
Verify with the data read from the EEPROM:
# ethtool -m swp11
Identifier : 0x18 (QSFP-DD Double Density 8X Pluggable Transceiver (INF-8628))
...
Module State : 0x03 (ModuleReady)
LowPwrAllowRequestHW : Off
LowPwrRequestSW : Off
Put the associated port administratively down which will instruct the
host to transition the module to low power mode:
# ip link set dev swp11 down
Query the power mode again:
$ ethtool --show-module swp11
Module parameters for swp11:
power-mode-policy auto
power-mode low
Verify with the data read from the EEPROM:
# ethtool -m swp11
Identifier : 0x18 (QSFP-DD Double Density 8X Pluggable Transceiver (INF-8628))
...
Module State : 0x01 (ModuleLowPwr)
LowPwrAllowRequestHW : Off
LowPwrRequestSW : On
SFF-8636 testing
================
# ethtool -m swp13
Identifier : 0x11 (QSFP28)
...
Extended identifier description : 5.0W max. Power consumption, High Power Class (> 3.5 W) enabled
Power set : Off
Power override : On
...
Transmit avg optical power (Channel 1) : 0.7733 mW / -1.12 dBm
Transmit avg optical power (Channel 2) : 0.7649 mW / -1.16 dBm
Transmit avg optical power (Channel 3) : 0.7790 mW / -1.08 dBm
Transmit avg optical power (Channel 4) : 0.7837 mW / -1.06 dBm
Rcvr signal avg optical power(Channel 1) : 0.9302 mW / -0.31 dBm
Rcvr signal avg optical power(Channel 2) : 0.9079 mW / -0.42 dBm
Rcvr signal avg optical power(Channel 3) : 0.8993 mW / -0.46 dBm
Rcvr signal avg optical power(Channel 4) : 0.8778 mW / -0.57 dBm
The module is not in low power mode, as it is not forced by hardware
(Power override is on) or by software (Power set is off).
The power mode can be queried from the kernel. In case Power override
was off, the kernel would need to take into account the state of the
LPMode signal, which is not visible to user space.
$ ethtool --show-module swp13
Module parameters for swp13:
power-mode-policy high
power-mode high
Change the power mode policy to 'auto':
# ethtool --set-module swp13 power-mode-policy auto
Query the power mode again:
$ ethtool --show-module swp13
Module parameters for swp13:
power-mode-policy auto
power-mode low
Verify with the data read from the EEPROM:
# ethtool -m swp13
Identifier : 0x11 (QSFP28)
Extended identifier description : 5.0W max. Power consumption, High Power Class (> 3.5 W) not enabled
Power set : On
Power override : On
...
Transmit avg optical power (Channel 1) : 0.0000 mW / -inf dBm
Transmit avg optical power (Channel 2) : 0.0000 mW / -inf dBm
Transmit avg optical power (Channel 3) : 0.0000 mW / -inf dBm
Transmit avg optical power (Channel 4) : 0.0000 mW / -inf dBm
Rcvr signal avg optical power(Channel 1) : 0.0000 mW / -inf dBm
Rcvr signal avg optical power(Channel 2) : 0.0000 mW / -inf dBm
Rcvr signal avg optical power(Channel 3) : 0.0000 mW / -inf dBm
Rcvr signal avg optical power(Channel 4) : 0.0000 mW / -inf dBm
Put the associated port administratively up which will instruct the host
to transition the module to high power mode:
# ip link set dev swp13 up
Query the power mode again:
$ ethtool --show-module swp13
Module parameters for swp13:
power-mode-policy auto
power-mode high
Verify with the data read from the EEPROM:
# ethtool -m swp13
Identifier : 0x11 (QSFP28)
...
Extended identifier description : 5.0W max. Power consumption, High Power Class (> 3.5 W) enabled
Power set : Off
Power override : On
...
Transmit avg optical power (Channel 1) : 0.7934 mW / -1.01 dBm
Transmit avg optical power (Channel 2) : 0.7859 mW / -1.05 dBm
Transmit avg optical power (Channel 3) : 0.7885 mW / -1.03 dBm
Transmit avg optical power (Channel 4) : 0.7985 mW / -0.98 dBm
Rcvr signal avg optical power(Channel 1) : 0.9325 mW / -0.30 dBm
Rcvr signal avg optical power(Channel 2) : 0.9034 mW / -0.44 dBm
Rcvr signal avg optical power(Channel 3) : 0.9086 mW / -0.42 dBm
Rcvr signal avg optical power(Channel 4) : 0.8885 mW / -0.51 dBm
Put the associated port administratively down which will instruct the
host to transition the module to low power mode:
# ip link set dev swp13 down
Query the power mode again:
$ ethtool --show-module swp13
Module parameters for swp13:
power-mode-policy auto
power-mode low
Verify with the data read from the EEPROM:
# ethtool -m swp13
Identifier : 0x11 (QSFP28)
...
Extended identifier description : 5.0W max. Power consumption, High Power Class (> 3.5 W) not enabled
Power set : On
Power override : On
...
Transmit avg optical power (Channel 1) : 0.0000 mW / -inf dBm
Transmit avg optical power (Channel 2) : 0.0000 mW / -inf dBm
Transmit avg optical power (Channel 3) : 0.0000 mW / -inf dBm
Transmit avg optical power (Channel 4) : 0.0000 mW / -inf dBm
Rcvr signal avg optical power(Channel 1) : 0.0000 mW / -inf dBm
Rcvr signal avg optical power(Channel 2) : 0.0000 mW / -inf dBm
Rcvr signal avg optical power(Channel 3) : 0.0000 mW / -inf dBm
Rcvr signal avg optical power(Channel 4) : 0.0000 mW / -inf dBm
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
|
Commit 7122debb4367 ("kunit: introduce
kunit_kmalloc_array/kunit_kcalloc() helpers") added new functions but
called last arg `flags`, unlike the existing code that used `gfp`.
This only is an issue in test.h, test.c still used `gfp`.
But the documentation was copy-pasted with the old names, leading to
kernel-doc warnings.
Do s/flags/gfp to make the names consistent and fix the warnings.
Fixes: 7122debb4367 ("kunit: introduce kunit_kmalloc_array/kunit_kcalloc() helpers")
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Daniel Latypov <dlatypov@google.com>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Brendan Higgins <brendanhiggins@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
|
|
The structleak plugin causes the stack frame size to grow immensely:
lib/bitfield_kunit.c: In function 'test_bitfields_constants':
lib/bitfield_kunit.c:93:1: error: the frame size of 7440 bytes is larger than 2048 bytes [-Werror=frame-larger-than=]
Turn it off in this file.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Brendan Higgins <brendanhiggins@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
|
|
The structleak plugin causes the stack frame size to grow immensely when
used with KUnit:
drivers/thunderbolt/test.c:1529:1: error: the frame size of 1176 bytes is larger than 1024 bytes [-Werror=frame-larger-than=]
Turn it off in this file.
Linus already split up tests in this file, so this change *should* be
redundant now.
Signed-off-by: Brendan Higgins <brendanhiggins@google.com>
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
|
|
The structleak plugin causes the stack frame size to grow immensely when
used with KUnit:
../drivers/base/test/property-entry-test.c:492:1: warning: the frame size of 2832 bytes is larger than 2048 bytes [-Wframe-larger-than=]
../drivers/base/test/property-entry-test.c:322:1: warning: the frame size of 2080 bytes is larger than 2048 bytes [-Wframe-larger-than=]
../drivers/base/test/property-entry-test.c:250:1: warning: the frame size of 4976 bytes is larger than 2048 bytes [-Wframe-larger-than=]
../drivers/base/test/property-entry-test.c:115:1: warning: the frame size of 3280 bytes is larger than 2048 bytes [-Wframe-larger-than=]
Turn it off in this file.
Signed-off-by: Brendan Higgins <brendanhiggins@google.com>
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
|
|
The structleak plugin causes the stack frame size to grow immensely when
used with KUnit:
../drivers/iio/test/iio-test-format.c: In function ‘iio_test_iio_format_value_fixedpoint’:
../drivers/iio/test/iio-test-format.c:98:1: warning: the frame size of 2336 bytes is larger than 2048 bytes [-Wframe-larger-than=]
Turn it off in this file.
Signed-off-by: Brendan Higgins <brendanhiggins@google.com>
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Kees Cook <keescook@chromium.org>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
|
|
KUnit and structleak don't play nice, so add a makefile variable for
enabling structleak when it complains.
Co-developed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Brendan Higgins <brendanhiggins@google.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
|
|
[Why]
DPALT detection for B0 PHY has its own set of RDPCSPIPE registers
[How]
Use RDPCSPIPE registers to detect if DPALT lane is 4 lane
Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Acked-by: Solomon Chiu <solomon.chiu@amd.com>
Signed-off-by: Hansen <Hansen.Dsouza@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
|
|
[why]
The existing limit was mistakenly bigger than 4k for DCN 3.1
Reviewed-by: Zhan Liu <Zhan.Liu@amd.com>
Acked-by: Solomon Chiu <solomon.chiu@amd.com>
Signed-off-by: Nikola Cornij <nikola.cornij@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
|
|
[Why]
Overriding link setting inside override_training_settings
result in fallback link settings being ignored. This can
potentially cause link training to always fail and consequently
result in an infinite loop of link training to occur in
dp_verify_link_cap during detection.
[How]
Since preferred link settings are already considered inside
decide_link_settings, skip the check in override_training_settings
to avoid infinite link training loops.
Reviewed-by: Wenjing Liu <wenjing.liu@amd.com>
Acked-by: Solomon Chiu <solomon.chiu@amd.com>
Signed-off-by: George Shen <george.shen@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
|
|
Currently, the driver doesn't set the PCP-based priority for DCT, hence
DCT response packets are transmitted without user priority.
Fix it by setting user provided priority in the eth_prio field in the DCT
context, which in turn sets the value in the transmitted packet.
Fixes: 776a3906b692 ("IB/mlx5: Add support for DC target QP")
Link: https://lore.kernel.org/r/5fd2d94a13f5742d8803c218927322257d53205c.1633512672.git.leonro@nvidia.com
Signed-off-by: Patrisious Haddad <phaddad@nvidia.com>
Reviewed-by: Maor Gottlieb <maorg@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
|
|
The valid bit for extended CQE's written by HW is retrieved from the
incorrect quad-word. This leads to missed completions for any UD traffic
particularly after a wrap-around.
Get the valid bit for extended CQE's from the correct quad-word in the
descriptor.
Fixes: 551c46edc769 ("RDMA/irdma: Add user/kernel shared libraries")
Link: https://lore.kernel.org/r/20211005182302.374-1-shiraz.saleem@intel.com
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
|
|
If nfsd has existing listening sockets without any processes, then an error
returned from svc_create_xprt() for an additional transport will remove
those existing listeners. We're seeing this in practice when userspace
attempts to create rpcrdma transports without having the rpcrdma modules
present before creating nfsd kernel processes. Fix this by checking for
existing sockets before calling nfsd_destroy().
Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
|
|
The crit_lock mutex could be unlocked twice as reported here
https://lists.osuosl.org/pipermail/intel-wired-lan/Week-of-Mon-20210823/025525.html
Remove the superfluous unlock. Technically the problem was already
present before 5ac49f3c2702 as that commit only replaced the locking
primitive, but no functional change.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Fixes: 5ac49f3c2702 ("iavf: use mutexes for locking of critical sections")
Fixes: bac8486116b0 ("iavf: Refactor the watchdog state machine")
Signed-off-by: Stefan Assmann <sassmann@kpanic.de>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
|
|
When VSI set up failed in i40e_probe() as part of PF switch set up
driver was trying to free misc IRQ vectors in
i40e_clear_interrupt_scheme and produced a kernel Oops:
Trying to free already-free IRQ 266
WARNING: CPU: 0 PID: 5 at kernel/irq/manage.c:1731 __free_irq+0x9a/0x300
Workqueue: events work_for_cpu_fn
RIP: 0010:__free_irq+0x9a/0x300
Call Trace:
? synchronize_irq+0x3a/0xa0
free_irq+0x2e/0x60
i40e_clear_interrupt_scheme+0x53/0x190 [i40e]
i40e_probe.part.108+0x134b/0x1a40 [i40e]
? kmem_cache_alloc+0x158/0x1c0
? acpi_ut_update_ref_count.part.1+0x8e/0x345
? acpi_ut_update_object_reference+0x15e/0x1e2
? strstr+0x21/0x70
? irq_get_irq_data+0xa/0x20
? mp_check_pin_attr+0x13/0xc0
? irq_get_irq_data+0xa/0x20
? mp_map_pin_to_irq+0xd3/0x2f0
? acpi_register_gsi_ioapic+0x93/0x170
? pci_conf1_read+0xa4/0x100
? pci_bus_read_config_word+0x49/0x70
? do_pci_enable_device+0xcc/0x100
local_pci_probe+0x41/0x90
work_for_cpu_fn+0x16/0x20
process_one_work+0x1a7/0x360
worker_thread+0x1cf/0x390
? create_worker+0x1a0/0x1a0
kthread+0x112/0x130
? kthread_flush_work_fn+0x10/0x10
ret_from_fork+0x1f/0x40
The problem is that at that point misc IRQ vectors
were not allocated yet and we get a call trace
that driver is trying to free already free IRQ vectors.
Add a check in i40e_clear_interrupt_scheme for __I40E_MISC_IRQ_REQUESTED
PF state before calling i40e_free_misc_vector. This state is set only if
misc IRQ vectors were properly initialized.
Fixes: c17401a1dd21 ("i40e: use separate state bit for miscellaneous IRQ setup")
Reported-by: PJ Waskiewicz <pwaskiewicz@jumptrading.com>
Signed-off-by: Sylwester Dziedziuch <sylwesterx.dziedziuch@intel.com>
Signed-off-by: Mateusz Palczewski <mateusz.palczewski@intel.com>
Tested-by: Dave Switzer <david.switzer@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
|
|
The loop in i40e_get_capabilities can never end. The problem is that
although i40e_aq_discover_capabilities returns with an error if there's
a firmware problem, the returned error is not checked. There is a check for
pf->hw.aq.asq_last_status but that value is set to I40E_AQ_RC_OK on most
firmware problems.
When i40e_aq_discover_capabilities encounters a firmware problem, it will
encounter the same problem on its next invocation. As the result, the loop
becomes endless. We hit this with I40E_ERR_ADMIN_QUEUE_TIMEOUT but looking
at the code, it can happen with a range of other firmware errors.
I don't know what the correct behavior should be: whether the firmware
should be retried a few times, or whether pf->hw.aq.asq_last_status should
be always set to the encountered firmware error (but then it would be
pointless and can be just replaced by the i40e_aq_discover_capabilities
return value). However, the current behavior with an endless loop under the
rtnl mutex(!) is unacceptable and Intel has not submitted a fix, although we
explained the bug to them 7 months ago.
This may not be the best possible fix but it's better than hanging the whole
system on a firmware bug.
Fixes: 56a62fc86895 ("i40e: init code and hardware support")
Tested-by: Stefan Assmann <sassmann@redhat.com>
Signed-off-by: Jiri Benc <jbenc@redhat.com>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Dave Switzer <david.switzer@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
|
|
Commit in Fixes intended to exclude the Winchip series and referred to
CONFIG_WINCHIP3D, but the config symbol is called CONFIG_MWINCHIP3D.
Hence, scripts/checkkconfigsymbols.py warns:
WINCHIP3D
Referencing files: arch/x86/Kconfig
Correct the reference to the intended config symbol.
Fixes: 69b8d3fcabdc ("x86/Kconfig: Exclude i586-class CPUs lacking PAE support from the HIGHMEM64G Kconfig group")
Suggested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: <stable@vger.kernel.org>
Link: https://lkml.kernel.org/r/20210803113531.30720-4-lukas.bulwahn@gmail.com
|
|
The refactoring in the commit in Fixes introduced an ifdef
CONFIG_OLPC_XO1_5_SCI, however the config symbol is actually called
"CONFIG_OLPC_XO15_SCI".
Fortunately, ./scripts/checkkconfigsymbols.py warns:
OLPC_XO1_5_SCI
Referencing files: arch/x86/platform/olpc/olpc.c
Correct this ifdef condition to the intended config symbol.
Fixes: ec9964b48033 ("Platform: OLPC: Move EC-specific functionality out from x86")
Suggested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: <stable@vger.kernel.org>
Link: https://lkml.kernel.org/r/20210803113531.30720-3-lukas.bulwahn@gmail.com
|
|
Commit
3c73b81a9164 ("x86/entry, selftests: Further improve user entry sanity checks")
added a warning if AC is set when in the kernel.
Commit
662a0221893a3d ("x86/entry: Fix AC assertion")
changed the warning to only fire if the CPU supports SMAP.
However, the warning can still trigger on a machine that supports SMAP
but where it's disabled in the kernel config and when running the
syscall_nt selftest, for example:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 49 at irqentry_enter_from_user_mode
CPU: 0 PID: 49 Comm: init Tainted: G T 5.15.0-rc4+ #98 e6202628ee053b4f310759978284bd8bb0ce6905
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1ubuntu1 04/01/2014
RIP: 0010:irqentry_enter_from_user_mode
...
Call Trace:
? irqentry_enter
? exc_general_protection
? asm_exc_general_protection
? asm_exc_general_protectio
IS_ENABLED(CONFIG_X86_SMAP) could be added to the warning condition, but
even this would not be enough in case SMAP is disabled at boot time with
the "nosmap" parameter.
To be consistent with "nosmap" behaviour, clear X86_FEATURE_SMAP when
!CONFIG_X86_SMAP.
Found using entry-fuzz + satrandconfig.
[ bp: Massage commit message. ]
Fixes: 3c73b81a9164 ("x86/entry, selftests: Further improve user entry sanity checks")
Fixes: 662a0221893a ("x86/entry: Fix AC assertion")
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20211003223423.8666-1-vegard.nossum@oracle.com
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Commit in Fixes adds a condition with IS_ENABLED(CONFIG_64_BIT),
but the intended config item is called CONFIG_64BIT, as defined in
arch/x86/Kconfig.
Fortunately, scripts/checkkconfigsymbols.py warns:
64_BIT
Referencing files: arch/x86/include/asm/entry-common.h
Correct the reference to the intended config symbol.
Fixes: 662a0221893a ("x86/entry: Fix AC assertion")
Suggested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: <stable@vger.kernel.org>
Link: https://lkml.kernel.org/r/20210803113531.30720-2-lukas.bulwahn@gmail.com
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Commit in Fixes separated the architecture specific and filesystem parts
of the resctrl domain structures.
This left the error paths in domain_add_cpu() kfree()ing the memory with
the wrong type.
This will cause a problem if someone adds a new member to struct
rdt_hw_domain meaning d_resctrl is no longer the first member.
Fixes: 792e0f6f789b ("x86/resctrl: Split struct rdt_domain")
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Reinette Chatre <reinette.chatre@intel.com>
Link: https://lkml.kernel.org/r/20210917165924.28254-1-james.morse@arm.com
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domain_add_cpu() is called whenever a CPU is brought online. The
earlier call to domain_setup_ctrlval() allocates the control value
arrays.
If domain_setup_mon_state() fails, the control value arrays are not
freed.
Add the missing kfree() calls.
Fixes: 1bd2a63b4f0de ("x86/intel_rdt/mba_sc: Add initialization support")
Fixes: edf6fa1c4a951 ("x86/intel_rdt/cqm: Add RMID (Resource monitoring ID) management")
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Reinette Chatre <reinette.chatre@intel.com>
Cc: <stable@vger.kernel.org>
Link: https://lkml.kernel.org/r/20210917165958.28313-1-james.morse@arm.com
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