[Kernel-packages] [Bug 1730832] Re: [Feature] Add xHCI debug device support in the driver
** Tags added: cscc -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1730832 Title: [Feature] Add xHCI debug device support in the driver Status in intel: Fix Released Status in linux package in Ubuntu: Fix Released Status in linux source package in Bionic: Fix Released Bug description: Description xHCI compatible USB host controllers(i.e. super-speed USB3 controllers) can be implemented with the Debug Capability(DbC). It presents a debug device which is fully compliant with the USB framework and provides the equivalent of a very high performance full-duplex serial link. The debug capability operation model and registers interface are defined in 7.6.8 of the xHCI specification, revision 1.1. The DbC debug device shares a root port with the xHCI host. By default, the debug capability is disabled and the root port is assigned to xHCI. When the DbC is enabled, the root port will be assigned to the DbC debug device, and the xHCI sees nothing on this port. This implementation uses a sysfs node named under the xHCI device to manage the enabling and disabling of the debug capability. When the debug capability is enabled, it will present a debug device through the debug port. This debug device is fully compliant with the USB3 framework, and it can be enumerated by a debug host on the other end of the USB link. As soon as the debug device is configured, a TTY serial device named /dev/ttyDBC0 will be created. One use of this link is running a login service on the debug target. Hence it can be remote accessed by a debug host. Another use case can probably be found in servers. It provides a peer-to-peer USB link between two host-only machines. This provides a reasonable out-of-band communication method between two servers. Target Kernel: 4.16 Target Release: 18.04 To manage notifications about this bug go to: https://bugs.launchpad.net/intel/+bug/1730832/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1730832] Re: [Feature] Add xHCI debug device support in the driver
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- bionic' to 'verification-done-bionic'. If the problem still exists, change the tag 'verification-needed-bionic' to 'verification-failed- bionic'. 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-bionic -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1730832 Title: [Feature] Add xHCI debug device support in the driver Status in intel: Fix Released Status in linux package in Ubuntu: Fix Released Status in linux source package in Bionic: Fix Released Bug description: Description xHCI compatible USB host controllers(i.e. super-speed USB3 controllers) can be implemented with the Debug Capability(DbC). It presents a debug device which is fully compliant with the USB framework and provides the equivalent of a very high performance full-duplex serial link. The debug capability operation model and registers interface are defined in 7.6.8 of the xHCI specification, revision 1.1. The DbC debug device shares a root port with the xHCI host. By default, the debug capability is disabled and the root port is assigned to xHCI. When the DbC is enabled, the root port will be assigned to the DbC debug device, and the xHCI sees nothing on this port. This implementation uses a sysfs node named under the xHCI device to manage the enabling and disabling of the debug capability. When the debug capability is enabled, it will present a debug device through the debug port. This debug device is fully compliant with the USB3 framework, and it can be enumerated by a debug host on the other end of the USB link. As soon as the debug device is configured, a TTY serial device named /dev/ttyDBC0 will be created. One use of this link is running a login service on the debug target. Hence it can be remote accessed by a debug host. Another use case can probably be found in servers. It provides a peer-to-peer USB link between two host-only machines. This provides a reasonable out-of-band communication method between two servers. Target Kernel: 4.16 Target Release: 18.04 To manage notifications about this bug go to: https://bugs.launchpad.net/intel/+bug/1730832/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1730832] Re: [Feature] Add xHCI debug device support in the driver
This bug was erroneously marked for verification in bionic; verification is not required and verification-needed-bionic is being removed. ** Tags removed: verification-needed-bionic ** Tags added: verification-done-bionic -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1730832 Title: [Feature] Add xHCI debug device support in the driver Status in intel: Fix Released Status in linux package in Ubuntu: Fix Released Status in linux source package in Bionic: Fix Released Bug description: Description xHCI compatible USB host controllers(i.e. super-speed USB3 controllers) can be implemented with the Debug Capability(DbC). It presents a debug device which is fully compliant with the USB framework and provides the equivalent of a very high performance full-duplex serial link. The debug capability operation model and registers interface are defined in 7.6.8 of the xHCI specification, revision 1.1. The DbC debug device shares a root port with the xHCI host. By default, the debug capability is disabled and the root port is assigned to xHCI. When the DbC is enabled, the root port will be assigned to the DbC debug device, and the xHCI sees nothing on this port. This implementation uses a sysfs node named under the xHCI device to manage the enabling and disabling of the debug capability. When the debug capability is enabled, it will present a debug device through the debug port. This debug device is fully compliant with the USB3 framework, and it can be enumerated by a debug host on the other end of the USB link. As soon as the debug device is configured, a TTY serial device named /dev/ttyDBC0 will be created. One use of this link is running a login service on the debug target. Hence it can be remote accessed by a debug host. Another use case can probably be found in servers. It provides a peer-to-peer USB link between two host-only machines. This provides a reasonable out-of-band communication method between two servers. Target Kernel: 4.16 Target Release: 18.04 To manage notifications about this bug go to: https://bugs.launchpad.net/intel/+bug/1730832/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1730832] Re: [Feature] Add xHCI debug device support in the driver
** Tags removed: verification-needed-bionic ** Tags added: kernel-fixup-verification-needed-bionic -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1730832 Title: [Feature] Add xHCI debug device support in the driver Status in intel: Fix Released Status in linux package in Ubuntu: Fix Released Status in linux source package in Bionic: Fix Released Bug description: Description xHCI compatible USB host controllers(i.e. super-speed USB3 controllers) can be implemented with the Debug Capability(DbC). It presents a debug device which is fully compliant with the USB framework and provides the equivalent of a very high performance full-duplex serial link. The debug capability operation model and registers interface are defined in 7.6.8 of the xHCI specification, revision 1.1. The DbC debug device shares a root port with the xHCI host. By default, the debug capability is disabled and the root port is assigned to xHCI. When the DbC is enabled, the root port will be assigned to the DbC debug device, and the xHCI sees nothing on this port. This implementation uses a sysfs node named under the xHCI device to manage the enabling and disabling of the debug capability. When the debug capability is enabled, it will present a debug device through the debug port. This debug device is fully compliant with the USB3 framework, and it can be enumerated by a debug host on the other end of the USB link. As soon as the debug device is configured, a TTY serial device named /dev/ttyDBC0 will be created. One use of this link is running a login service on the debug target. Hence it can be remote accessed by a debug host. Another use case can probably be found in servers. It provides a peer-to-peer USB link between two host-only machines. This provides a reasonable out-of-band communication method between two servers. Target Kernel: 4.16 Target Release: 18.04 To manage notifications about this bug go to: https://bugs.launchpad.net/intel/+bug/1730832/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1730832] Re: [Feature] Add xHCI debug device support in the driver
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- bionic' to 'verification-done-bionic'. If the problem still exists, change the tag 'verification-needed-bionic' to 'verification-failed- bionic'. 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-bionic -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1730832 Title: [Feature] Add xHCI debug device support in the driver Status in intel: Fix Released Status in linux package in Ubuntu: Fix Released Status in linux source package in Bionic: Fix Released Bug description: Description xHCI compatible USB host controllers(i.e. super-speed USB3 controllers) can be implemented with the Debug Capability(DbC). It presents a debug device which is fully compliant with the USB framework and provides the equivalent of a very high performance full-duplex serial link. The debug capability operation model and registers interface are defined in 7.6.8 of the xHCI specification, revision 1.1. The DbC debug device shares a root port with the xHCI host. By default, the debug capability is disabled and the root port is assigned to xHCI. When the DbC is enabled, the root port will be assigned to the DbC debug device, and the xHCI sees nothing on this port. This implementation uses a sysfs node named under the xHCI device to manage the enabling and disabling of the debug capability. When the debug capability is enabled, it will present a debug device through the debug port. This debug device is fully compliant with the USB3 framework, and it can be enumerated by a debug host on the other end of the USB link. As soon as the debug device is configured, a TTY serial device named /dev/ttyDBC0 will be created. One use of this link is running a login service on the debug target. Hence it can be remote accessed by a debug host. Another use case can probably be found in servers. It provides a peer-to-peer USB link between two host-only machines. This provides a reasonable out-of-band communication method between two servers. Target Kernel: 4.16 Target Release: 18.04 To manage notifications about this bug go to: https://bugs.launchpad.net/intel/+bug/1730832/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1730832] Re: [Feature] Add xHCI debug device support in the driver
** Changed in: intel Status: Triaged => Fix Released -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1730832 Title: [Feature] Add xHCI debug device support in the driver Status in intel: Fix Released Status in linux package in Ubuntu: Fix Released Status in linux source package in Bionic: Fix Released Bug description: Description xHCI compatible USB host controllers(i.e. super-speed USB3 controllers) can be implemented with the Debug Capability(DbC). It presents a debug device which is fully compliant with the USB framework and provides the equivalent of a very high performance full-duplex serial link. The debug capability operation model and registers interface are defined in 7.6.8 of the xHCI specification, revision 1.1. The DbC debug device shares a root port with the xHCI host. By default, the debug capability is disabled and the root port is assigned to xHCI. When the DbC is enabled, the root port will be assigned to the DbC debug device, and the xHCI sees nothing on this port. This implementation uses a sysfs node named under the xHCI device to manage the enabling and disabling of the debug capability. When the debug capability is enabled, it will present a debug device through the debug port. This debug device is fully compliant with the USB3 framework, and it can be enumerated by a debug host on the other end of the USB link. As soon as the debug device is configured, a TTY serial device named /dev/ttyDBC0 will be created. One use of this link is running a login service on the debug target. Hence it can be remote accessed by a debug host. Another use case can probably be found in servers. It provides a peer-to-peer USB link between two host-only machines. This provides a reasonable out-of-band communication method between two servers. Target Kernel: 4.16 Target Release: 18.04 To manage notifications about this bug go to: https://bugs.launchpad.net/intel/+bug/1730832/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1730832] Re: [Feature] Add xHCI debug device support in the driver
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
[Kernel-packages] [Bug 1730832] Re: [Feature] Add xHCI debug device support in the driver
** Changed in: linux (Ubuntu Bionic) Status: In Progress => Fix Committed -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1730832 Title: [Feature] Add xHCI debug device support in the driver Status in intel: Triaged Status in linux package in Ubuntu: Fix Committed Status in linux source package in Bionic: Fix Committed Bug description: Description xHCI compatible USB host controllers(i.e. super-speed USB3 controllers) can be implemented with the Debug Capability(DbC). It presents a debug device which is fully compliant with the USB framework and provides the equivalent of a very high performance full-duplex serial link. The debug capability operation model and registers interface are defined in 7.6.8 of the xHCI specification, revision 1.1. The DbC debug device shares a root port with the xHCI host. By default, the debug capability is disabled and the root port is assigned to xHCI. When the DbC is enabled, the root port will be assigned to the DbC debug device, and the xHCI sees nothing on this port. This implementation uses a sysfs node named under the xHCI device to manage the enabling and disabling of the debug capability. When the debug capability is enabled, it will present a debug device through the debug port. This debug device is fully compliant with the USB3 framework, and it can be enumerated by a debug host on the other end of the USB link. As soon as the debug device is configured, a TTY serial device named /dev/ttyDBC0 will be created. One use of this link is running a login service on the debug target. Hence it can be remote accessed by a debug host. Another use case can probably be found in servers. It provides a peer-to-peer USB link between two host-only machines. This provides a reasonable out-of-band communication method between two servers. Target Kernel: 4.16 Target Release: 18.04 To manage notifications about this bug go to: https://bugs.launchpad.net/intel/+bug/1730832/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1730832] Re: [Feature] Add xHCI debug device support in the driver
https://lists.ubuntu.com/archives/kernel-team/2018-March/090558.html -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1730832 Title: [Feature] Add xHCI debug device support in the driver Status in intel: Triaged Status in linux package in Ubuntu: In Progress Status in linux source package in Bionic: In Progress Bug description: Description xHCI compatible USB host controllers(i.e. super-speed USB3 controllers) can be implemented with the Debug Capability(DbC). It presents a debug device which is fully compliant with the USB framework and provides the equivalent of a very high performance full-duplex serial link. The debug capability operation model and registers interface are defined in 7.6.8 of the xHCI specification, revision 1.1. The DbC debug device shares a root port with the xHCI host. By default, the debug capability is disabled and the root port is assigned to xHCI. When the DbC is enabled, the root port will be assigned to the DbC debug device, and the xHCI sees nothing on this port. This implementation uses a sysfs node named under the xHCI device to manage the enabling and disabling of the debug capability. When the debug capability is enabled, it will present a debug device through the debug port. This debug device is fully compliant with the USB3 framework, and it can be enumerated by a debug host on the other end of the USB link. As soon as the debug device is configured, a TTY serial device named /dev/ttyDBC0 will be created. One use of this link is running a login service on the debug target. Hence it can be remote accessed by a debug host. Another use case can probably be found in servers. It provides a peer-to-peer USB link between two host-only machines. This provides a reasonable out-of-band communication method between two servers. Target Kernel: 4.16 Target Release: 18.04 To manage notifications about this bug go to: https://bugs.launchpad.net/intel/+bug/1730832/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1730832] Re: [Feature] Add xHCI debug device support in the driver
** Changed in: linux (Ubuntu Bionic) Status: Triaged => In Progress ** Changed in: linux (Ubuntu Bionic) Assignee: Canonical Kernel Team (canonical-kernel-team) => Joseph Salisbury (jsalisbury) -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1730832 Title: [Feature] Add xHCI debug device support in the driver Status in intel: Triaged Status in linux package in Ubuntu: In Progress Status in linux source package in Bionic: In Progress Bug description: Description xHCI compatible USB host controllers(i.e. super-speed USB3 controllers) can be implemented with the Debug Capability(DbC). It presents a debug device which is fully compliant with the USB framework and provides the equivalent of a very high performance full-duplex serial link. The debug capability operation model and registers interface are defined in 7.6.8 of the xHCI specification, revision 1.1. The DbC debug device shares a root port with the xHCI host. By default, the debug capability is disabled and the root port is assigned to xHCI. When the DbC is enabled, the root port will be assigned to the DbC debug device, and the xHCI sees nothing on this port. This implementation uses a sysfs node named under the xHCI device to manage the enabling and disabling of the debug capability. When the debug capability is enabled, it will present a debug device through the debug port. This debug device is fully compliant with the USB3 framework, and it can be enumerated by a debug host on the other end of the USB link. As soon as the debug device is configured, a TTY serial device named /dev/ttyDBC0 will be created. One use of this link is running a login service on the debug target. Hence it can be remote accessed by a debug host. Another use case can probably be found in servers. It provides a peer-to-peer USB link between two host-only machines. This provides a reasonable out-of-band communication method between two servers. Target Kernel: 4.16 Target Release: 18.04 To manage notifications about this bug go to: https://bugs.launchpad.net/intel/+bug/1730832/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1730832] Re: [Feature] Add xHCI debug device support in the driver
** Information type changed from Private to Public ** Also affects: linux (Ubuntu) Importance: Undecided Status: New ** Also affects: linux (Ubuntu Bionic) Importance: Undecided Status: New ** Changed in: linux (Ubuntu Bionic) Status: New => Triaged ** Changed in: intel Status: Incomplete => Triaged ** Changed in: linux (Ubuntu Bionic) Importance: Undecided => Medium ** Changed in: intel Importance: Undecided => Medium ** Changed in: linux (Ubuntu Bionic) Assignee: (unassigned) => Canonical Kernel Team (canonical-kernel-team) -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1730832 Title: [Feature] Add xHCI debug device support in the driver Status in intel: Triaged Status in linux package in Ubuntu: Triaged Status in linux source package in Bionic: Triaged Bug description: Description xHCI compatible USB host controllers(i.e. super-speed USB3 controllers) can be implemented with the Debug Capability(DbC). It presents a debug device which is fully compliant with the USB framework and provides the equivalent of a very high performance full-duplex serial link. The debug capability operation model and registers interface are defined in 7.6.8 of the xHCI specification, revision 1.1. The DbC debug device shares a root port with the xHCI host. By default, the debug capability is disabled and the root port is assigned to xHCI. When the DbC is enabled, the root port will be assigned to the DbC debug device, and the xHCI sees nothing on this port. This implementation uses a sysfs node named under the xHCI device to manage the enabling and disabling of the debug capability. When the debug capability is enabled, it will present a debug device through the debug port. This debug device is fully compliant with the USB3 framework, and it can be enumerated by a debug host on the other end of the USB link. As soon as the debug device is configured, a TTY serial device named /dev/ttyDBC0 will be created. One use of this link is running a login service on the debug target. Hence it can be remote accessed by a debug host. Another use case can probably be found in servers. It provides a peer-to-peer USB link between two host-only machines. This provides a reasonable out-of-band communication method between two servers. Target Kernel: 4.16 Target Release: 18.04 To manage notifications about this bug go to: https://bugs.launchpad.net/intel/+bug/1730832/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
