Displaying 20 results from an estimated 1100 matches similar to: "Setting up serial ports on kvm guests"
2012 Feb 03
3
Setting up a pci passthrough device
I have been investigating pci pass-through for virtualized
guests and the documentation I have found seems to me to
lack a certain consistency in its example. This may be
due to my not understanding what it is trying to inform
me.
What I wish to do is to configure a pci multi-port serial
i/o card for use by a single virtual host.
I start by running lspci -v on the host to identify the
serial
2015 Mar 17
1
KVM guest not running but cannot stop either
These are the messages that I get when trying to attach a virtio disk
to or perform a shutdown of the problem vm guest.
Add hardware
This device could not be attached to the running machine. Would you
like to make the device available after the next guest shutdown?
Requested operation is not valid: cannot do live update a device on
inactive domain
Traceback (most recent call last):
File
2020 Jan 18
3
USB-hotplugging fails with "failed to load cgroup BPF prog: Operation not permitted" on cgroups v2
Hi all,
I've disabled cgroups v1 on my system with the kernel boot option
"systemd.unified_cgroup_hierarchy=1". Since doing so, USB hotplugging
fails to work, seemingly due to a permissions problem with BPF. Please
note that the technique I'm going to describe worked just fine for
hotplugging USB devices to running domains until this change.
Attaching / detaching USB devices
2020 Jan 21
0
Re: USB-hotplugging fails with "failed to load cgroup BPF prog: Operation not permitted" on cgroups v2
On Mon, Jan 20, 2020 at 09:00:15PM +0100, Pol Van Aubel wrote:
> Hi,
>
> Quoting Pavel Hrdina (2020-01-20 14:29:36)
> > On Sat, Jan 18, 2020 at 11:17:11PM +0100, Pol Van Aubel wrote:
> > > Hi all,
> > >
> > > I've disabled cgroups v1 on my system with the kernel boot option
> > > "systemd.unified_cgroup_hierarchy=1". Since doing
2007 Mar 09
2
How do I configure additional serial ports?
I have installed two 4-port serial cards (http://www.startech.com/
Product/ItemDetail.aspx?productid=PCI4S550&c=US) on a CentOS 4.4
system. The hardware appears to be recognized correctly, as kudzu
added 2 entries to /etc/sysconfig/hwconf and lscpi shows both cards
(output of lspci -vv for both cards included at the end of this email):
# lspci
00:00.0 Host bridge: Intel Corporation
2020 Jan 21
2
Re: USB-hotplugging fails with "failed to load cgroup BPF prog: Operation not permitted" on cgroups v2
Hi,
Quoting Pavel Hrdina (2020-01-21 12:53:49)
> On Mon, Jan 20, 2020 at 09:00:15PM +0100, Pol Van Aubel wrote:
> > Hi,
> >
> > Quoting Pavel Hrdina (2020-01-20 14:29:36)
> > > On Sat, Jan 18, 2020 at 11:17:11PM +0100, Pol Van Aubel wrote:
> > > > Hi all,
> > > >
> > > > I've disabled cgroups v1 on my system with the kernel
2008 Nov 25
1
sio vs uart vs ucomm problems / differences
We are in the process of migrating one of our embedded apps to use
uart by default instead of sio in RELENG_7 in prep for the day when
sio eventually disappears. Unfortunately, the application doesnt
want to work with uart with puc backed devices, but still works with
sio. Stranger still, the app works with the uart driver when uart
attaches to the built in com port on the isa bus. However,
2011 Dec 01
0
How to add additional Serial Ports to a KVM guest?
The vm host shows this:
# setserial -g /dev/ttyS*
/dev/ttyS0, UART: 16550A, Port: 0x03f8, IRQ: 4
/dev/ttyS1, UART: 16950/954, Port: 0xd040, IRQ: 17
/dev/ttyS2, UART: 16950/954, Port: 0xd048, IRQ: 17
/dev/ttyS3, UART: 16950/954, Port: 0xd050, IRQ: 17
#
# ll /dev/ttyS*
crw-rw----. 1 root dialout 4, 64 Nov 10 12:18 /dev/ttyS0
crw-rw----. 1 root dialout 4, 65 Nov 10 12:18 /dev/ttyS1
crw-rw----. 1
2008 Sep 15
1
sio => uart: one port is gone
This is a fairly standard and old machine with 2 COM ports.
Recently (last Friday) I decided to update my RELENG_7 system and also
to transition from sio to uart.
This what I had before the upgrade:
kernel: sio0: <16550A-compatible COM port> port 0x3f8-0x3ff irq 4 flags
0x10 on acpi0
kernel: sio0: type 16550A
kernel: sio0: [FILTER]
kernel: sio1: <16550A-compatible COM port> port
2013 Aug 13
13
[PATCH v8 8/5] Add UART support and arch timer initialization for OMAP5
Since OMAP UART has a few distinct features than common 8250 UART, I
re-implemented its driver rather than porting it based on ns16550.c.
There are mainly two big differences between the implementations. First,
OMAP UART introduces the concept of register access mode, which divides
the register map into seperated space. Switching the access mode is then
necessary when configuring it. Second, THRE
2013 Aug 29
2
Re: [PATCH V1 17/29] xen/arm: Mark each device used by Xen as disabled in DOM0 FDT
Hi Julien
> On some board, there is no alias to the UART. To avoid modification in
> the device tree, dt-uart should also search device by path.
>
> To distinguish an alias from a path, dt-uart will check the first character.
> If it''s a / then it''s path, otherwise it''s an alias.
>
> Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx>
>
2012 Sep 11
2
[PATCH 6/8] ns16550: PCI initialization adjustments
Besides single-port serial cards, also accept multi-port ones and such
providing mixed functionality (e.g. also having a parallel port).
Reading PCI_INTERRUPT_PIN before ACPI gets enabled generally produces
an incorrect IRQ (below 16, whereas after enabling ACPI it frequently
would end up at a higher one), so this is useful (almost) only when a
system already boots in ACPI mode.
Signed-off-by:
2008 May 05
2
PCI serial card works on 6.2 but not on 6.3
We have upgraded a box from 6.2 to 6.3-RELEASE. Afterwards the box does not
recognize its ST Lab I-160 serial card with Netmos 9845 Chipset. It worked
flawlessly on 6.2 with puc(4) driver.
>From dmesg:
pci1: <simple comms, UART> at device 8.0 (no driver attached)
~# pciconf -l -v | grep -B 4 UART
none2@pci1:8:0: class=0x070002 card=0x00041000 chip=0x98459710 rev=0x01
hdr=0x00
2011 Oct 12
1
[PATCH] ns16550: fix poll handling regression
Prior to c/s 23811:f1349a968a5a LSR_THRE was checked only once, while
there it got promoted into the surrounding loop''s condition. Since that
bit may not clear for an extended period of time (i.e. when no new
output is generated), it must not be used in this way indefinitely.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
--- a/xen/drivers/char/ns16550.c
+++
2015 Aug 01
3
interacting with UART
On Sat, Aug 01, 2015 at 12:58:40PM +0000, Tal Lubko via Syslinux wrote:
> Hi
>
> I would like SYSLINUX to get input from UART and act accordingly.
> For example, I want to choose what rootfs to load according to the sequence received from UART.
> So I'd like to know if SYSLINUX a the infrastructure for doing this
Yes, Syslinux supports serial ports a.k.a. UARTS. Since the very
2013 Feb 12
1
Out of Memory Error
Hi,
I am trying to attach a usb device to my virtualbox node using libvirt. My
node is already running, I stop my node and then I am trying to add this
usb device.
I have a separate xml file defined for usb. It looks like this:
*<device>
<hostdev mode='subsystem' type='usb'>
<source>
<vendor id='0x4321'/>
<product
2013 May 24
10
[PATCH 0/4] ARM/early-printk: Improve reusability and add Calxeda support
The current early-printk support for ARM is rather hard-coded, making
it hard to add machines or tweak settings.
This series slightly moves some code to gather UART settings in
xen/arch/arm/Rules.mk instead of the actual .c files. Also it allows
two different machines with different settings to share the same
driver, which the last patch exploits to add support the Calxeda
Midway hardware.
This
2011 Feb 14
1
Use libvirt-python to attach cdrom
Hi all,
I want to attach cdrom by libvirt.py .But can't find a func in
libvirt.py can finish this work.
Who can help me ?
Regard
--
Seven Ling
E-mail: jiejie.ling at qq.com
2018 Jan 29
2
Centos 7 add-on serial cards
On 01/28/18 20:15, Fred Smith wrote:
> On Sun, Jan 28, 2018 at 12:10:29PM -0500, Pete Geenhuizen wrote:
>> I'm upgrading from CentOS6 to CentOS 7.
>>
>> I run 2 weather stations on C6 and have one of them attached to
>> ttyS0 which is on the motherboard, and the other to ttyS2 which in
>> on an add-on PCI serial card.
>>
>> I'm migrating the
2015 Aug 02
1
interacting with UART
Tal Lubko via Syslinux <syslinux at zytor.com> writes:
> What I'm planning to do is to write COM32 image that will open UART
> channel and wait for input (until timeout arrives). In case input
> arrives, it will parse and validate it and act accordingly.
> My solution doesn't involve user interaction.
This is exactly what the Syslinux command interpreter does, if