[Bug 1738334] Re: hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add io_mem_pfn callback")

[Launchpad Bug Tracker]

This bug was fixed in the package linux - 4.15.0-12.13

---
linux (4.15.0-12.13) bionic; urgency=medium

  * linux: 4.15.0-12.13 -proposed tracker (LP: #1754059)

  * CONFIG_EFI=y on armhf (LP: #1726362)
- [Config] CONFIG_EFI=y on armhf, reconcile secureboot EFI settings

  * ppc64el: Support firmware disable of RFI flush (LP: #1751994)
- powerpc/pseries: Support firmware disable of RFI flush
- powerpc/powernv: Support firmware disable of RFI flush

  * [Feature] CFL/CNL (PCH:CNP-H): New GPIO Commit added (GPIO Driver needed)
(LP: #1751714)
- gpio / ACPI: Drop unnecessary ACPI GPIO to Linux GPIO translation
- pinctrl: intel: Allow custom GPIO base for pad groups
- pinctrl: cannonlake: Align GPIO number space with Windows

  * [Feature] Add xHCI debug device support in the driver (LP: #1730832)
- usb: xhci: Make some static functions global
- usb: xhci: Add DbC support in xHCI driver
- [Config] USB_XHCI_DBGCAP=y for commit mainline dfba2174dc42.

  * [SRU] Lenovo E41 Mic mute hotkey is not responding (LP: #1753347)
- platform/x86: ideapad-laptop: Increase timeout to wait for EC answer

  * headset mic can't be detected on two Dell machines (LP: #1748807)
- ALSA: hda - Fix a wrong FIXUP for alc289 on Dell machines

  * hisi_sas: Add disk LED support (LP: #1752695)
- scsi: hisi_sas: directly attached disk LED feature for v2 hw

  * [Feature] [Graphics]Whiskey Lake (Coffelake-U 4+2) new PCI Device ID adds
(LP: #1742561)
- drm/i915/cfl: Adding more Coffee Lake PCI IDs.

  * [Bug] [USB Function][CFL-CNL PCH]Stall Error and USB Transaction Error in
trace, Disable of device-initiated U1/U2 failed and rebind failed: -517
during suspend/resume with usb storage. (LP: #1730599)
- usb: Don't print a warning if interface driver rebind is deferred at 
resume

  * retpoline: ignore %cs:0xNNN constant indirections (LP: #1752655)
- [Packaging] retpoline -- elide %cs:0x constants on i386
- [Config] retpoline -- clean up i386 retpoline files

  * hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add io_mem_pfn
callback") (LP: #1738334)
- drm/ttm: add ttm_bo_io_mem_pfn to check io_mem_pfn

  * [Asus UX360UA] battery status in unity-panel is not changing when battery is
being charged (LP: #1661876) // AC adapter status not detected on Asus
ZenBook UX410UAK (LP: #1745032)
- ACPI / battery: Add quirk for Asus UX360UA and UX410UAK

  * ASUS UX305LA - Battery state not detected correctly (LP: #1482390)
- ACPI / battery: Add quirk for Asus GL502VSK and UX305LA

  * [18.04 FEAT] Automatically detect layer2 setting in the qeth device driver
(LP: #1747639)
- s390/diag: add diag26c support for VNIC info
- s390/qeth: support early setup for z/VM NICs

  * Bionic update to v4.15.7 stable release (LP: #1752317)
- netfilter: drop outermost socket lock in getsockopt()
- arm64: mm: don't write garbage into TTBR1_EL1 register
- kconfig.h: Include compiler types to avoid missed struct attributes
- MIPS: boot: Define __ASSEMBLY__ for its.S build
- xtensa: fix high memory/reserved memory collision
- scsi: ibmvfc: fix misdefined reserved field in ibmvfc_fcp_rsp_info
- MIPS: Drop spurious __unused in struct compat_flock
- cfg80211: fix cfg80211_beacon_dup
- i2c: designware: must wait for enable
- i2c: bcm2835: Set up the rising/falling edge delays
- X.509: fix BUG_ON() when hash algorithm is unsupported
- X.509: fix NULL dereference when restricting key with unsupported_sig
- PKCS#7: fix certificate chain verification
- PKCS#7: fix certificate blacklisting
- extcon: int3496: process id-pin first so that we start with the right 
status
- genirq/matrix: Handle CPU offlining proper
- RDMA/uverbs: Protect from races between lookup and destroy of uobjects
- RDMA/uverbs: Protect from command mask overflow
- RDMA/uverbs: Fix bad unlock balance in ib_uverbs_close_xrcd
- RDMA/uverbs: Fix circular locking dependency
- RDMA/uverbs: Sanitize user entered port numbers prior to access it
- iio: adc: stm32: fix stm32h7_adc_enable error handling
- iio: srf08: fix link error "devm_iio_triggered_buffer_setup" undefined
- iio: buffer: check if a buffer has been set up when poll is called
- iio: adis_lib: Initialize trigger before requesting interrupt
- Kbuild: always define endianess in kconfig.h
- x86/apic/vector: Handle vector release on CPU unplug correctly
- x86/oprofile: Fix bogus GCC-8 warning in nmi_setup()
- mm, swap, frontswap: fix THP swap if frontswap enabled
- mm: don't defer struct page initialization for Xen pv guests
- uapi/if_ether.h: move __UAPI_DEF_ETHHDR libc define
- irqchip/gic-v3: Use wmb() instead of smb_wmb() in gic_raise_softirq()
- irqchip/mips-gic: Avoid spuriously handling masked interrupts
- PCI/cxgb4: Extend T3 PCI quirk to T4+ devices
- net: thunderbolt: Tear 

[Bug 1738334] Re: hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add io_mem_pfn callback")

[Seth Forshee]

** Also affects: linux (Ubuntu Bionic)
   Importance: Undecided
 Assignee: Daniel Axtens (daxtens)
   Status: Confirmed

** Changed in: linux (Ubuntu Bionic)
   Status: Confirmed => Fix Committed

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1738334

Title:
  hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add
  io_mem_pfn callback")

To manage notifications about this bug go to:
https://bugs.launchpad.net/linux/+bug/1738334/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1738334] Re: hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add io_mem_pfn callback")

[Zhanglei Mao]

Hawei team just tested and verified this bug on 4.15.0-10-generic kernel
on D05 server.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1738334

Title:
  hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add
  io_mem_pfn callback")

To manage notifications about this bug go to:
https://bugs.launchpad.net/linux/+bug/1738334/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1738334] Re: hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add io_mem_pfn callback")

[Zhanglei Mao]

Call traces for this bug on D05 for kernel 4.15.0-10-generic which
tested on 1 March 2018 on 18.04 daily build

** Attachment added: "Call traces for this bug on D05 for kernel 
4.15.0-10-generic which tested on 1 March 2018 on 18.04 daily build"
   
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1738334/+attachment/5065851/+files/bionic_kernel_oops_on_D05.png

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1738334

Title:
  hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add
  io_mem_pfn callback")

To manage notifications about this bug go to:
https://bugs.launchpad.net/linux/+bug/1738334/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1738334] Re: hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add io_mem_pfn callback")

[Daniel Axtens]

** Description changed:

  [SRU Justification]
  
  [Impact]
- On Artful kernels, X fails to start and a kernel splat is printed.
+ On Artful and Bionic kernels, X fails to start and a kernel splat is printed.
  
  This is cbecause ea642c3216cb ("drm/ttm: add io_mem_pfn callback") is
  incomplete: the hisilicon hibmc driver does not contain the callback and
  so the kernel tries to execute code at NULL.
  
  [Fix]
- There is a discussion and potential fix at 
https://lists.freedesktop.org/archives/dri-devel/2017-November/159002.html The 
fix hasn't landed yet and it looks like they're going to re-engineer the entire 
section instead.
  
- Rather than wait for that and deal with the massive regression
- potential, the fix I have picked to submit is very very minimal and
- touches only hibmc.
+ Bionic: There is a generic fix in 4.16 at
+ c67fa6edc8b11afe22c88a23963170bf5f151acf. It is part of a series that
+ applies this generic fix and does a bunch of cleanups; we can safely
+ just pick up the generic fix.
+ 
+ Artful: Rather than a generic fix, I have submitted a very very minimal
+ fix that only touches hibmc.
  
  [Regression Potential]
- Minimal - fix only touches hibmc driver. Tested on D05 board.
+ Artful: Minimal - fix only touches hibmc driver. Tested on D05 board.
+ Bionic: fix is to generic drm code, but is small and easily reviewable.
  
  [Testcase]
  Install patched kernel, try to start X. If it succeeds, the fix works. If 
there's a kernel splat, the fix does not work.
  
  [Notes]
- HiSilicon would really like this fix in Artful in such time so that when the 
next 16.04 point release ships in February, the HWE kernel will work with Xorg.
+ Artful: HiSilicon would really like this fix in Artful in such time so that 
when the next 16.04 point release ships, the HWE kernel will work with Xorg.
+ 
+ Bionic: no extra notes.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1738334

Title:
  hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add
  io_mem_pfn callback")

To manage notifications about this bug go to:
https://bugs.launchpad.net/linux/+bug/1738334/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1738334] Re: hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add io_mem_pfn callback")

[Daniel Axtens]

Hi Fred,

Thanks for the update. I have tried to nominate the bug for Bionic; I
think the kernel team normally does this so we will see if that has
worked.

More importantly, I will test and send a patch for Bionic shortly.

Regards,
Daniel

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1738334

Title:
  hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add
  io_mem_pfn callback")

To manage notifications about this bug go to:
https://bugs.launchpad.net/linux/+bug/1738334/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1738334] Re: hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add io_mem_pfn callback")

[Fred Kimmy]

hi daniel

this bug also affect this ubuntu 18.04.0 version which using bionic
kernel branch(kernel 4.15), because this patchset have merged into
mainline linus kernel 4.16rc1 (after kernel 4.15).

I want to add this bionic tag, but i fail it.  Can you add this bionic
tag to merge this patchset into bionic branch.

thank you

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1738334

Title:
  hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add
  io_mem_pfn callback")

To manage notifications about this bug go to:
https://bugs.launchpad.net/linux/+bug/1738334/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1738334] Re: hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add io_mem_pfn callback")

[Fred Kimmy]

** Also affects: linux
   Importance: Undecided
   Status: New

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1738334

Title:
  hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add
  io_mem_pfn callback")

To manage notifications about this bug go to:
https://bugs.launchpad.net/linux/+bug/1738334/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1738334] Re: hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add io_mem_pfn callback")

[Launchpad Bug Tracker]

This bug was fixed in the package linux - 4.13.0-36.40

---
linux (4.13.0-36.40) artful; urgency=medium

  * linux: 4.13.0-36.40 -proposed tracker (LP: #1750010)

  * Rebuild without "CVE-2017-5754 ARM64 KPTI fixes" patch set

linux (4.13.0-35.39) artful; urgency=medium

  * linux: 4.13.0-35.39 -proposed tracker (LP: #1748743)

  * CVE-2017-5715 (Spectre v2 Intel)
- Revert "UBUNTU: SAUCE: turn off IBPB when full retpoline is present"
- SAUCE: turn off IBRS when full retpoline is present
- [Packaging] retpoline files must be sorted
- [Packaging] pull in retpoline files

linux (4.13.0-34.37) artful; urgency=medium

  * linux: 4.13.0-34.37 -proposed tracker (LP: #1748475)

  * libata: apply MAX_SEC_1024 to all LITEON EP1 series devices (LP: #1743053)
- libata: apply MAX_SEC_1024 to all LITEON EP1 series devices

  * KVM patches for s390x to provide facility bits 81 (ppa15) and 82 (bpb)
(LP: #1747090)
- KVM: s390: wire up bpb feature

  * artful 4.13 i386 kernels crash after memory hotplug remove (LP: #1747069)
- Revert "mm, memory_hotplug: do not associate hotadded memory to zones 
until
  online"

  * CVE-2017-5715 (Spectre v2 Intel)
- x86/feature: Enable the x86 feature to control Speculation
- x86/feature: Report presence of IBPB and IBRS control
- x86/enter: MACROS to set/clear IBRS and set IBPB
- x86/enter: Use IBRS on syscall and interrupts
- x86/idle: Disable IBRS entering idle and enable it on wakeup
- x86/idle: Disable IBRS when offlining cpu and re-enable on wakeup
- x86/mm: Set IBPB upon context switch
- x86/mm: Only set IBPB when the new thread cannot ptrace current thread
- x86/entry: Stuff RSB for entry to kernel for non-SMEP platform
- x86/kvm: add MSR_IA32_SPEC_CTRL and MSR_IA32_PRED_CMD to kvm
- x86/kvm: Set IBPB when switching VM
- x86/kvm: Toggle IBRS on VM entry and exit
- x86/spec_ctrl: Add sysctl knobs to enable/disable SPEC_CTRL feature
- x86/spec_ctrl: Add lock to serialize changes to ibrs and ibpb control
- x86/cpu/AMD: Add speculative control support for AMD
- x86/microcode: Extend post microcode reload to support IBPB feature
- KVM: SVM: Do not intercept new speculative control MSRs
- x86/svm: Set IBRS value on VM entry and exit
- x86/svm: Set IBPB when running a different VCPU
- KVM: x86: Add speculative control CPUID support for guests
- SAUCE: turn off IBPB when full retpoline is present

  * Artful 4.13 fixes for tun (LP: #1748846)
- tun: call dev_get_valid_name() before register_netdevice()
- tun: allow positive return values on dev_get_valid_name() call
- tun/tap: sanitize TUNSETSNDBUF input

  * boot failure on AMD Raven + WestonXT (LP: #1742759)
- SAUCE: drm/amdgpu: add atpx quirk handling (v2)

linux (4.13.0-33.36) artful; urgency=low

  * linux: 4.13.0-33.36 -proposed tracker (LP: #1746903)

  [ Stefan Bader ]
  * starting VMs causing retpoline4 to reboot (LP: #1747507) // CVE-2017-5715
(Spectre v2 retpoline)
- x86/retpoline: Fill RSB on context switch for affected CPUs
- x86/retpoline: Add LFENCE to the retpoline/RSB filling RSB macros
- x86/retpoline: Optimize inline assembler for vmexit_fill_RSB
- x86/retpoline: Remove the esp/rsp thunk
- x86/retpoline: Simplify vmexit_fill_RSB()

  * Missing install-time driver for QLogic QED 25/40/100Gb Ethernet NIC
(LP: #1743638)
- [d-i] Add qede to nic-modules udeb

  * hisi_sas: driver robustness fixes (LP: #1739807)
- scsi: hisi_sas: fix reset and port ID refresh issues
- scsi: hisi_sas: avoid potential v2 hw interrupt issue
- scsi: hisi_sas: fix v2 hw underflow residual value
- scsi: hisi_sas: add v2 hw DFX feature
- scsi: hisi_sas: add irq and tasklet cleanup in v2 hw
- scsi: hisi_sas: service interrupt ITCT_CLR interrupt in v2 hw
- scsi: hisi_sas: fix internal abort slot timeout bug
- scsi: hisi_sas: us start_phy in PHY_FUNC_LINK_RESET
- scsi: hisi_sas: fix NULL check in SMP abort task path
- scsi: hisi_sas: fix the risk of freeing slot twice
- scsi: hisi_sas: kill tasklet when destroying irq in v3 hw
- scsi: hisi_sas: complete all tasklets prior to host reset

  * [Artful/Zesty] ACPI APEI error handling bug fixes (LP: #1732990)
- ACPI: APEI: fix the wrong iteration of generic error status block
- ACPI / APEI: clear error status before acknowledging the error

  * [Zesty/Artful] On ARM64 PCIE physical function passthrough guest fails to
boot (LP: #1732804)
- vfio/pci: Virtualize Maximum Payload Size
- vfio/pci: Virtualize Maximum Read Request Size

  * hisi_sas: Add ATA command support for SMR disks (LP: #1739891)
- scsi: hisi_sas: support zone management commands

  * thunderx2: i2c driver PEC and ACPI clock fixes (LP: #1738073)
- ACPI / APD: Add clock frequency for ThunderX2 I2C controller
- i2c: xlp9xx: Get clock frequency with clk API
- i2c: xlp9xx: Handle 

[Bug 1738334] Re: hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add io_mem_pfn callback")

[Daniel Axtens]

Hi,

I installed 4.13.0-35-generic from artful-proposed. The kernel boots and
X starts fine, so this has passed verification.

Regards,
Daniel

** Tags removed: verification-needed-artful
** Tags added: verification-done-artful

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1738334

Title:
  hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add
  io_mem_pfn callback")

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1738334/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1738334] Re: hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add io_mem_pfn callback")

[Kleber Sacilotto de Souza]

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-
artful' to 'verification-done-artful'. If the problem still exists,
change the tag 'verification-needed-artful' to 'verification-failed-
artful'.

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!


** Tags added: verification-needed-artful

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1738334

Title:
  hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add
  io_mem_pfn callback")

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1738334/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1738334] Re: hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add io_mem_pfn callback")

[Kleber Sacilotto de Souza]

** Changed in: linux (Ubuntu Artful)
   Status: New => Fix Committed

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1738334

Title:
  hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add
  io_mem_pfn callback")

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1738334/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1738334] Re: hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add io_mem_pfn callback")

[Stefan Bader]

** Also affects: linux (Ubuntu Artful)
   Importance: Undecided
   Status: New

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1738334

Title:
  hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add
  io_mem_pfn callback")

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1738334/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

Re: [Bug 1738334] Re: hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add io_mem_pfn callback")

[Zhanglei Mao]

It is good to update to "Fred" (Xin Wei) off-line and thank you very much
for it.

On Tue, Jan 23, 2018 at 8:46 AM, Daniel Axtens 
wrote:

> I have talked to the kernel team about this and updated Fred off-line.
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1738334
>
> Title:
>   hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add
>   io_mem_pfn callback")
>
> Status in linux package in Ubuntu:
>   Confirmed
>
> Bug description:
>   [SRU Justification]
>
>   [Impact]
>   On Artful kernels, X fails to start and a kernel splat is printed.
>
>   This is cbecause ea642c3216cb ("drm/ttm: add io_mem_pfn callback") is
>   incomplete: the hisilicon hibmc driver does not contain the callback
>   and so the kernel tries to execute code at NULL.
>
>   [Fix]
>   There is a discussion and potential fix at
> https://lists.freedesktop.org/archives/dri-devel/2017-November/159002.html
> The fix hasn't landed yet and it looks like they're going to re-engineer
> the entire section instead.
>
>   Rather than wait for that and deal with the massive regression
>   potential, the fix I have picked to submit is very very minimal and
>   touches only hibmc.
>
>   [Regression Potential]
>   Minimal - fix only touches hibmc driver. Tested on D05 board.
>
>   [Testcase]
>   Install patched kernel, try to start X. If it succeeds, the fix works.
> If there's a kernel splat, the fix does not work.
>
>   [Notes]
>   HiSilicon would really like this fix in Artful in such time so that when
> the next 16.04 point release ships in February, the HWE kernel will work
> with Xorg.
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/
> 1738334/+subscriptions
>


-- 
Zhanglei Mao
Solutions Architect, Sales and Business Development
Canonical Group Ltd.
zhanglei@canonical.com
+86-13625010929 (m)
+852-6700 6026 (m)
www.ubuntu.com
www.canonical.com

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1738334

Title:
  hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add
  io_mem_pfn callback")

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1738334/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1738334] Re: hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add io_mem_pfn callback")

[Daniel Axtens]

I have talked to the kernel team about this and updated Fred off-line.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1738334

Title:
  hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add
  io_mem_pfn callback")

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1738334/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1738334] Re: hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add io_mem_pfn callback")

[Fred Kimmy]

whether this patchset will merge into ubuntu 16.04.4 version or not? this 
patchset will important for our DO5 board, Can you check it please? 

thank you

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1738334

Title:
  hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add
  io_mem_pfn callback")

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1738334/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1738334] Re: hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add io_mem_pfn callback")

[Zhanglei Mao]

This patch have been accepted to be merged in in kernel V4.16. Please
refer to:  https://lkml.org/lkml/2017/12/25/24

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1738334

Title:
  hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add
  io_mem_pfn callback")

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1738334/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1738334] Re: hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add io_mem_pfn callback")

[Daniel Axtens]

** Description changed:

- ea642c3216cb ("drm/ttm: add io_mem_pfn callback") is incomplete: the
- hisilicon hibmc driver does not contain the callback and so X does not
- start.
+ [SRU Justification]
  
- Discussion and potential fix at https://lists.freedesktop.org/archives
- /dri-devel/2017-November/159002.html
+ [Impact]
+ On Artful kernels, X fails to start and a kernel splat is printed.
  
- This affects Artful, upstream has not landed on a solution yet as far as
- I can tell, so lets backport the first proposed small fix.
+ This is cbecause ea642c3216cb ("drm/ttm: add io_mem_pfn callback") is
+ incomplete: the hisilicon hibmc driver does not contain the callback and
+ so the kernel tries to execute code at NULL.
+ 
+ [Fix]
+ There is a discussion and potential fix at 
https://lists.freedesktop.org/archives/dri-devel/2017-November/159002.html The 
fix hasn't landed yet and it looks like they're going to re-engineer the entire 
section instead.
+ 
+ Rather than wait for that and deal with the massive regression
+ potential, the fix I have picked to submit is very very minimal and
+ touches only hibmc.
+ 
+ [Regression Potential]
+ Minimal - fix only touches hibmc driver. Tested on D05 board.
+ 
+ [Testcase]
+ Install patched kernel, try to start X. If it succeeds, the fix works. If 
there's a kernel splat, the fix does not work.
+ 
+ [Notes]
+ HiSilicon would really like this fix in Artful in such time so that when the 
next 16.04 point release ships in February, the HWE kernel will work with Xorg.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1738334

Title:
  hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add
  io_mem_pfn callback")

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1738334/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1738334] Re: hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add io_mem_pfn callback")

[Zhanglei Mao]

Notes and some more detail for this bug/patch:

The bug is from/caused by 4.12 DRM architecture,  the main line  commit
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h=v4.15-rc3=ea642c3216cb2a60d1c0e760ae47ee85c9c16447

It will cause x-window start hanged, the detail bug are
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1698700

The fix path link are here: https://lists.freedesktop.org/archives/dri-
devel/2017-November/159002.html

This patch only change Huawei driver, it will not affect any other
vendors.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1738334

Title:
  hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add
  io_mem_pfn callback")

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1738334/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1738334] Re: hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add io_mem_pfn callback")

[Zhanglei Mao]

This patch need to merged and fixed for the release 16.04.04. The final
SRU4 windows is 8 Dec. to 6 Jan 2018.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1738334

Title:
  hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add
  io_mem_pfn callback")

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1738334/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1738334] Re: hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add io_mem_pfn callback")

[Daniel Axtens]

Confirmed - the symptom is a kernel splat about "Attempting to execute
userspace memory" triggered by Xorg with LR in ttm_bo_vm_fault - see
attached screenshot (sorry!)


** Changed in: linux (Ubuntu)
   Status: Incomplete => Confirmed

** Attachment added: "splat.png"
   
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1738334/+attachment/5022893/+files/splat.png

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1738334

Title:
  hisilicon hibmc regression due to ea642c3216cb ("drm/ttm: add
  io_mem_pfn callback")

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1738334/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs