Re: [Xen-devel] [PATCH v3 0/7] Emulate virtual UART for DOM0 and some UART clean up

[Julien Grall <julien.grall@xxxxxxxxxx>]

On 08/01/2013 05:09 PM, Julien Grall wrote:
> Hi,
> 
> This third version of this patch series. It follows the thread
> http://patches.linaro.org/18358/ on Linux mailing list.
> 
> In some configuration, the kernel can use hardcoded code to access to the
> UART (for instance early printk). If Xen has stolen the UART for its own use,
> DOM0 will abort because Xen has not mapped to DOM0 the UART memory.
> 
> With this patch series, Xen will "replace" the real UART by a basic virtual
> UART for DOM0.
> 
> For the moment, this patch series is not able to cooperate with early printk
> in guest kernel.
> 
> This patch series also contains clean up for the pl011 and exynos4210 drivers.
> 
> For all the changes see the different patches.
> 
> Julien Grall (7):
>   pl011: Move registers' definition in a separate file
>   xen/arm: Use define instead of hardcoded value in debug-pl011
>   xen/arm: New callback in uart_driver to retrieve serial information
>   xen/arm: Implement a virtual UART
>   exynos4210: rename UTRSTAT_TX_EMPTY in UTRSTAT_TXFE
>   exynos4210: Implement vuart_info callback
>   pl011: Implement vuart_info callback
> 
>  xen/arch/arm/Makefile                   |    2 +-
>  xen/arch/arm/arm32/debug-exynos4210.inc |    2 +-
>  xen/arch/arm/arm32/debug-pl011.inc      |   18 ++--
>  xen/arch/arm/domain.c                   |   12 ++-
>  xen/arch/arm/io.c                       |    2 +-
>  xen/arch/arm/io.h                       |    2 +-
>  xen/arch/arm/vpl011.c                   |  152 
> -------------------------------
>  xen/arch/arm/vpl011.h                   |   35 -------
>  xen/arch/arm/vuart.c                    |  150 ++++++++++++++++++++++++++++++
>  xen/arch/arm/vuart.h                    |   35 +++++++
>  xen/drivers/char/exynos4210-uart.c      |   15 +++
>  xen/drivers/char/pl011.c                |   63 ++++---------
>  xen/drivers/char/serial.c               |    8 ++
>  xen/include/asm-arm/domain.h            |   14 +--
>  xen/include/asm-arm/exynos4210-uart.h   |    3 +-
>  xen/include/asm-arm/pl011-uart.h        |   81 ++++++++++++++++
>  xen/include/xen/serial.h                |   13 +++
>  17 files changed, 350 insertions(+), 257 deletions(-)
>  delete mode 100644 xen/arch/arm/vpl011.c
>  delete mode 100644 xen/arch/arm/vpl011.h
>  create mode 100644 xen/arch/arm/vuart.c
>  create mode 100644 xen/arch/arm/vuart.h
>  create mode 100644 xen/include/asm-arm/pl011-uart.h
> 

I forgot to add this patch in the series:
http://patches.linaro.org/18710/. It didn't change since the previous
version.

-- 
Julien


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