workaround cavium thunderx silicon erratum 23144

[dann frazier]

[Impact]
This impacts 2 socket Cavium ThunderX systems using pass-1.1 silicon, and can result in IO hangs.

[Test Case]
$ dmesg | grep "ITS command queue timeout"

[Regression Risk]
The workaround is in gicv3 specific code, and only activated when the hw revision in the IIDR matches ThunderX pass 1.x silicon, so risk to other platforms is minimal.

[Robert Richter (rric.cavium)]

Upstream commit (in v4.7-rc2):

 fbf8f40e1658 irqchip/gicv3-its: numa: Enable workaround for Cavium thunderx erratum 23144

[Kamal Mostafa (kamalmostafa)]

This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-xenial' to 'verification-done-xenial'.

If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you!

[dann frazier (dannf)]

I rebuilt d-i against the kernel in proposed and booted it a couple of times. I have not reproduced this issue, so marking it verified.

~ # uname -a
Linux cvm3 4.4.0-25-generic #44-Ubuntu SMP Fri Jun 10 18:15:04 UTC 2016 aarch64 GNU/Linux
~ # dmesg | grep -i soft
[ 0.000000] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-di root=UUID=bc611283-1f38-4993-a2b9-883922c7ed1f ro earlycon=pl011,0x87e024000000 hardlockup_all_cpu_backtrace=1 softlockup_all_cpu_backtrace=1 earlycon=pl011,0x87e024000000 apt-setup/proposed=true
[ 0.000000] software IO TLB [mem 0xfbfed000-0xfffed000] (64MB) mapped at [ffff8000fb1ed000-ffff8000ff1ecfff]
[ 0.229859] CPU features: detected feature: Software prefetching using PRFM
[ 174.913338] xor: measuring software checksum speed

[dann frazier (dannf)]

Oops, comment #3 was posted against the wrong bug. This one still requires verification.

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux - 4.4.0-25.44

---------------
linux (4.4.0-25.44) xenial; urgency=low

  [ Kamal Mostafa ]

  * Release Tracking Bug
    - LP: #1591289

  * Xenial update to v4.4.13 stable release (LP: #1590455)
    - MIPS64: R6: R2 emulation bugfix
    - MIPS: math-emu: Fix jalr emulation when rd == $0
    - MIPS: MSA: Fix a link error on `_init_msa_upper' with older GCC
    - MIPS: Don't unwind to user mode with EVA
    - MIPS: Avoid using unwind_stack() with usermode
    - MIPS: Fix siginfo.h to use strict posix types
    - MIPS: Fix uapi include in exported asm/siginfo.h
    - MIPS: Fix watchpoint restoration
    - MIPS: Flush highmem pages in __flush_dcache_page
    - MIPS: Handle highmem pages in __update_cache
    - MIPS: Sync icache & dcache in set_pte_at
    - MIPS: ath79: make bootconsole wait for both THRE and TEMT
    - MIPS: Reserve nosave data for hibernation
    - MIPS: Loongson-3: Reserve 32MB for RS780E integrated GPU
    - MIPS: Use copy_s.fmt rather than copy_u.fmt
    - MIPS: Fix MSA ld_*/st_* asm macros to use PTR_ADDU
    - MIPS: Prevent "restoration" of MSA context in non-MSA kernels
    - MIPS: Disable preemption during prctl(PR_SET_FP_MODE, ...)
    - MIPS: ptrace: Fix FP context restoration FCSR regression
    - MIPS: ptrace: Prevent writes to read-only FCSR bits
    - MIPS: Fix sigreturn via VDSO on microMIPS kernel
    - MIPS: Build microMIPS VDSO for microMIPS kernels
    - MIPS: lib: Mark intrinsics notrace
    - MIPS: VDSO: Build with `-fno-strict-aliasing'
    - affs: fix remount failure when there are no options changed
    - ASoC: ak4642: Enable cache usage to fix crashes on resume
    - Input: uinput - handle compat ioctl for UI_SET_PHYS
    - ARM: mvebu: fix GPIO config on the Linksys boards
    - ARM: dts: at91: fix typo in sama5d2 PIN_PD24 description
    - ARM: dts: exynos: Add interrupt line to MAX8997 PMIC on exynos4210-trats
    - ARM: dts: imx35: restore existing used clock enumeration
    - ath9k: Add a module parameter to invert LED polarity.
    - ath9k: Fix LED polarity for some Mini PCI AR9220 MB92 cards.
    - ath10k: fix debugfs pktlog_filter write
    - ath10k: fix firmware assert in monitor mode
    - ath10k: fix rx_channel during hw reconfigure
    - ath10k: fix kernel panic, move arvifs list head init before htt init
    - ath5k: Change led pin configuration for compaq c700 laptop
    - hwrng: exynos - Fix unbalanced PM runtime put on timeout error path
    - rtlwifi: rtl8723be: Add antenna select module parameter
    - rtlwifi: btcoexist: Implement antenna selection
    - rtlwifi: Fix logic error in enter/exit power-save mode
    - rtlwifi: pci: use dev_kfree_skb_irq instead of kfree_skb in
      rtl_pci_reset_trx_ring
    - aacraid: Relinquish CPU during timeout wait
    - aacraid: Fix for aac_command_thread hang
    - aacraid: Fix for KDUMP driver hang
    - hwmon: (ads7828) Enable internal reference
    - mfd: intel-lpss: Save register context on suspend
    - mfd: intel_soc_pmic_core: Terminate panel control GPIO lookup table
      correctly
    - PM / Runtime: Fix error path in pm_runtime_force_resume()
    - cpuidle: Indicate when a device has been unregiste...

[dann frazier (dannf)]

Verification results from partner:

I was able to successfully test your kernel on a crb2s pass1.1 system.

This was tested:

 * started correct kernel,

 * executed on crb2s pass1.1,

 * 96 cpus detected,

 * node info in sysfs (indicating that numa was detected),

 * all pci bridges found (node 0 and node 1),

 * correct devicetree model provided by fw,

 * dtb containing node info,

 * booting to the prompt,

 * network detected on 10GB port on node 1 pci bridge (ssh working).

See below for some logs.

File: ./linux-common-uname.sh
------------------------------------------------------------
Linux arm64 4.4.0-25-generic #44~14.04.1-Ubuntu SMP Mon Jun 13 15:14:31 UTC 2016 aarch64 aarch64 aarch64 GNU/Linux
------------------------------------------------------------
PASSED: ./linux-common-uname.sh
============================================================
File: ./linux-common-cpurev-dmesg.sh
------------------------------------------------------------
[ 0.000000] Boot CPU: AArch64 Processor [430f0a11]
------------------------------------------------------------
PASSED: ./linux-common-cpurev-dmesg.sh
============================================================
File: ./linux-common-cpurev-cpuinfo.sh
------------------------------------------------------------
CPU architecture: 8
CPU implementer : 0x43
CPU part : 0x0a1
CPU revision : 1
CPU variant : 0x0
------------------------------------------------------------
PASSED: ./linux-common-cpurev-cpuinfo.sh
============================================================
File: ./linux-numa-cpuinfo.sh
------------------------------------------------------------
96
processor : 95
------------------------------------------------------------
PASSED: ./linux-numa-cpuinfo.sh
============================================================
File: ./linux-numa-sysfs-nodes.sh
------------------------------------------------------------
/sys/devices/system/node/node0
/sys/devices/system/node/node1
------------------------------------------------------------
PASSED: ./linux-numa-sysfs-nodes.sh
============================================================
File: ./linux-numa-pci-bridges-ecam-dmesg.sh
------------------------------------------------------------
pci 0000:00:01.0: PCI bridge to [bus 01]
pci 0000:00:14.0: PCI bridge to [bus 02]
pci 0000:00:15.0: PCI bridge to [bus 03]
pci 0000:00:16.0: PCI bridge to [bus 04]
pci 0002:00:02.0: PCI bridge to [bus 01]
pci 0004:00:01.0: PCI bridge to [bus 01]
pci 0004:00:14.0: PCI bridge to [bus 02]
pci 0004:00:15.0: PCI bridge to [bus 03]
pci 0004:00:16.0: PCI bridge to [bus 04]
pci 0006:00:02.0: PCI bridge to [bus 01]
------------------------------------------------------------
PASSED: ./linux-numa-pci-bridges-ecam-dmesg.sh
============================================================
File: ./linux-numa-pci-bridges-ecam-lspci.sh
------------------------------------------------------------
0000:00:01.0 PCI bridge: Cavium Networks Device a002 (rev 01)
0000:00:14.0 PCI bridge: Cavium Networks Device a002 (rev 01)
0000:00:15.0 PCI bridge: Cavium Networks Device a002 (rev 01)
0000:00:16.0 PCI bridge: Cavium Networks Device a002 (rev 01)
0002:00:02.0 PCI br...

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux - 4.4.0-28.47

---------------
linux (4.4.0-28.47) xenial; urgency=low

  [ Luis Henriques ]

  * Release Tracking Bug
    - LP: #1595874

  * Linux netfilter local privilege escalation issues (LP: #1595350)
    - netfilter: x_tables: don't move to non-existent next rule
    - netfilter: x_tables: validate targets of jumps
    - netfilter: x_tables: add and use xt_check_entry_offsets
    - netfilter: x_tables: kill check_entry helper
    - netfilter: x_tables: assert minimum target size
    - netfilter: x_tables: add compat version of xt_check_entry_offsets
    - netfilter: x_tables: check standard target size too
    - netfilter: x_tables: check for bogus target offset
    - netfilter: x_tables: validate all offsets and sizes in a rule
    - netfilter: x_tables: don't reject valid target size on some architectures
    - netfilter: arp_tables: simplify translate_compat_table args
    - netfilter: ip_tables: simplify translate_compat_table args
    - netfilter: ip6_tables: simplify translate_compat_table args
    - netfilter: x_tables: xt_compat_match_from_user doesn't need a retval
    - netfilter: x_tables: do compat validation via translate_table
    - netfilter: x_tables: introduce and use xt_copy_counters_from_user

  * Linux netfilter IPT_SO_SET_REPLACE memory corruption (LP: #1555338)
    - netfilter: x_tables: validate e->target_offset early
    - netfilter: x_tables: make sure e->next_offset covers remaining blob size
    - netfilter: x_tables: fix unconditional helper

linux (4.4.0-27.46) xenial; urgency=low

  [ Kamal Mostafa ]

  * Release Tracking Bug
    - LP: #1594906

  * Support Edge Gateway's Bluetooth LED (LP: #1512999)
    - Revert "UBUNTU: SAUCE: Bluetooth: Support for LED on Marvell modules"

linux (4.4.0-26.45) xenial; urgency=low

  [ Kamal Mostafa ]

  * Release Tracking Bug
    - LP: #1594442

  * linux: Implement secure boot state variables (LP: #1593075)
    - SAUCE: UEFI: Add secure boot and MOK SB State disabled sysctl

  * failures building userspace packages that include ethtool.h (LP: #1592930)
    - ethtool.h: define INT_MAX for userland

linux (4.4.0-25.44) xenial; urgency=low

  [ Kamal Mostafa ]

  * Release Tracking Bug
    - LP: #1591289

  * Xenial update to v4.4.13 stable release (LP: #1590455)
    - MIPS64: R6: R2 emulation bugfix
    - MIPS: math-emu: Fix jalr emulation when rd == $0
    - MIPS: MSA: Fix a link error on `_init_msa_upper' with older GCC
    - MIPS: Don't unwind to user mode with EVA
    - MIPS: Avoid using unwind_stack() with usermode
    - MIPS: Fix siginfo.h to use strict posix types
    - MIPS: Fix uapi include in exported asm/siginfo.h
    - MIPS: Fix watchpoint restoration
    - MIPS: Flush highmem pages in __flush_dcache_page
    - MIPS: Handle highmem pages in __update_cache
    - MIPS: Sync icache & dcache in set_pte_at
    - MIPS: ath79: make bootconsole wait for both THRE and TEMT
    - MIPS: Reserve nosave data for hibernation
    - MIPS: Loongson-3: Reserve 32MB for RS780E integrated GPU
    - MIPS: Use copy_s.fmt rather than copy_u.fmt
    - MIPS: Fix MSA ld_*/st_* asm macros to use PTR_ADDU
    - MIPS: Prevent "restoration" of MSA c...