On 19 April 2017 at 14:34, Jiahuan Zhang wrote:
> But from the source code, I found the main characteristic of virtio-serial
> is that,
> virtio-serial can create multiple serial ports and each port has a pair of
> control virt-queues and
> a pair of guest input/output virt-queues.
Its main chara
On 19 April 2017 at 12:09, Peter Maydell wrote:
> On 19 April 2017 at 11:04, Jiahuan Zhang wrote:
> > Okay. Thank you for pointing this out.
> > I would like to make a new serial device based on pl011,
> > but containing a buffer for guest-to-host data transfer.
>
> As I've said, the PL011 is in
On 19 April 2017 at 11:04, Jiahuan Zhang wrote:
> Okay. Thank you for pointing this out.
> I would like to make a new serial device based on pl011,
> but containing a buffer for guest-to-host data transfer.
As I've said, the PL011 is inherently byte at a time.
If you want better than that, I reco
On 19 April 2017 at 11:55, Peter Maydell wrote:
> On 19 April 2017 at 10:25, Jiahuan Zhang wrote:
> > On 19 April 2017 at 11:15, Peter Maydell
> wrote:
> >> What is happening is that the guest kernel's serial driver
> >> has a loop that (simplified) looks like this:
> >>
> >> do {
> >>
On 19 April 2017 at 10:25, Jiahuan Zhang wrote:
> On 19 April 2017 at 11:15, Peter Maydell wrote:
>> What is happening is that the guest kernel's serial driver
>> has a loop that (simplified) looks like this:
>>
>> do {
>> if (pl011_read(REG_FR) & FR_TXFF)
>> break; /* fifo full
On 19 April 2017 at 11:15, Peter Maydell wrote:
> On 19 April 2017 at 09:56, Jiahuan Zhang wrote:
> > Do you mean that it is reasonable for QEMU emulation consumes high CPU
> time
> > when doing host-guest interaction, since the interaction calls many QEMU
> > codes in the background?
>
> > Sinc
On 19 April 2017 at 09:56, Jiahuan Zhang wrote:
> Do you mean that it is reasonable for QEMU emulation consumes high CPU time
> when doing host-guest interaction, since the interaction calls many QEMU
> codes in the background?
> Since my guest app is rather simple and no while() is included, acc
On 18 April 2017 at 18:26, Peter Maydell wrote:
> On 18 April 2017 at 17:19, Jiahuan Zhang wrote:
> > Dear QEMU developers,
> > I am measuring the processor time for guest-host communication via
> socket.
> > The guest app is to write a 5M image to a serial device.
> > The serial deivce is redir
On 18 April 2017 at 17:19, Jiahuan Zhang wrote:
> Dear QEMU developers,
> I am measuring the processor time for guest-host communication via socket.
> The guest app is to write a 5M image to a serial device.
> The serial deivce is redirected to the socket in the command line.
> The host app is to
Dear QEMU developers,
I am measuring the processor time for guest-host communication via socket.
The guest app is to write a 5M image to a serial device.
The serial deivce is redirected to the socket in the command line.
The host app is to receive the data via socket until the peer closes the
conne
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