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Re: [Qemu-arm] [PATCH] hw/arm/virt: support 4 serial ports
From: |
Peter Maydell |
Subject: |
Re: [Qemu-arm] [PATCH] hw/arm/virt: support 4 serial ports |
Date: |
Mon, 23 Oct 2017 14:11:09 +0100 |
On 23 October 2017 at 13:27, Jason A. Donenfeld <address@hidden> wrote:
> The QEMU man page says:
>
> -serial dev
> This option can be used several times to
> simulate up to 4 serial ports.
>
> However, the ARM virt machine erroneously only provides 1 serial port.
> This patch fixes it by populating 4 of them.
>
> But, unfortunately, this patch doesn't actually work. Sending it to the
> list as inspiration for somebody on the ARM team who might be able to do
> this more properly.
This is really the documentation being wrong -- that is actually
a PC specific thing. In QEMU generally, -serial can be used
for as many serial ports as the machine model provides, up
to a maximum of four.
Why do you want more than one serial port in the virt board?
If there's a good reason we can add more, but mostly I only
expected that one would be needed, for the console.
(If you're using the TrustZone/EL3 support then there's
a second UART for the Secure world.)
thanks
-- PMM
- [Qemu-arm] [PATCH] hw/arm/virt: support 4 serial ports, Jason A. Donenfeld, 2017/10/23
- Re: [Qemu-arm] [PATCH] hw/arm/virt: support 4 serial ports,
Peter Maydell <=
- Re: [Qemu-arm] [PATCH] hw/arm/virt: support 4 serial ports, Philippe Mathieu-Daudé, 2017/10/23
- Re: [Qemu-arm] [PATCH] hw/arm/virt: support 4 serial ports, Jason A. Donenfeld, 2017/10/24
- Re: [Qemu-arm] [Qemu-devel] [PATCH] hw/arm/virt: support 4 serial ports, Andrew Jones, 2017/10/26
- Re: [Qemu-arm] [Qemu-devel] [PATCH] hw/arm/virt: support 4 serial ports, Jason A. Donenfeld, 2017/10/26
- Re: [Qemu-arm] [Qemu-devel] [PATCH] hw/arm/virt: support 4 serial ports, Peter Maydell, 2017/10/26
- Re: [Qemu-arm] [Qemu-devel] [PATCH] hw/arm/virt: support 4 serial ports, Jason A. Donenfeld, 2017/10/26
- Re: [Qemu-arm] [Qemu-devel] [PATCH] hw/arm/virt: support 4 serial ports, Peter Maydell, 2017/10/26
- Re: [Qemu-arm] [Qemu-devel] [PATCH] hw/arm/virt: support 4 serial ports, Jason A. Donenfeld, 2017/10/26
- Re: [Qemu-arm] [Qemu-devel] [PATCH] hw/arm/virt: support 4 serial ports, Peter Maydell, 2017/10/26
- Re: [Qemu-arm] [Qemu-devel] [PATCH] hw/arm/virt: support 4 serial ports, Jason A. Donenfeld, 2017/10/26