Re: [PATCH v1 07/16] arm/vuart: rename 'virtual UART' Kconfig option

[dmkhn@proton.me]

On Tue, Jun 24, 2025 at 08:37:22AM +0200, Orzel, Michal wrote:
> 
> 
> On 24/06/2025 05:55, dmkhn@proton.me wrote:
> > From: Denis Mukhin <dmukhin@ford.com>
> >
> > Rename HWDOM_VUART to HAS_VUART_MMIO.
> >
> > This emulator emulates only one register and the use of the emulator is
> > limited to early boot console in the guest OS.
> >
> > No functional change.
> >
> > Signed-off-by: Denis Mukhin <dmukhin@ford.com>
> > ---
> >  xen/arch/arm/Kconfig              | 2 +-
> >  xen/arch/arm/Makefile             | 2 +-
> >  xen/arch/arm/include/asm/domain.h | 2 +-
> >  xen/arch/arm/vuart.h              | 4 ++--
> >  4 files changed, 5 insertions(+), 5 deletions(-)
> >
> > diff --git a/xen/arch/arm/Kconfig b/xen/arch/arm/Kconfig
> > index 03888569f38c..b11cb583a763 100644
> > --- a/xen/arch/arm/Kconfig
> > +++ b/xen/arch/arm/Kconfig
> > @@ -177,7 +177,7 @@ config HAS_VUART_PL011
> >  	  Allows a guest to use SBSA Generic UART as a console. The
> >  	  SBSA Generic UART implements a subset of ARM PL011 UART.
> >
> > -config HWDOM_VUART
> > +config HAS_VUART_MMIO
> I personally don't like this change. The current config option name reads much
> better and clearly denotes the purpose.

In my opinion, the MMIO-based UART is a useful debugging tool for early guest
boot, even when the guest doesn't run in hwdom or on Arm system.

> 
> ~Michal
>