Re: [Xen-devel] [PATCH 10/16] xen: arm: enable synchronous console while starting secondary CPUs

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

On Wed, 20 Nov 2013, Ian Campbell wrote:
> If CONFIG_EARLY_PRINTK is in use then this gets all interleaved with the
> standard logging otherwise.
> 
> Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>

I am concerned because in this case console_start_sync and
console_end_sync would be called before console_endboot and I can't tell
whether it is a supported.


>  xen/arch/arm/smpboot.c |    5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/xen/arch/arm/smpboot.c b/xen/arch/arm/smpboot.c
> index ce832ae..9b58345 100644
> --- a/xen/arch/arm/smpboot.c
> +++ b/xen/arch/arm/smpboot.c
> @@ -28,6 +28,7 @@
>  #include <xen/softirq.h>
>  #include <xen/timer.h>
>  #include <xen/irq.h>
> +#include <xen/console.h>
>  #include <asm/gic.h>
>  
>  cpumask_t cpu_online_map;
> @@ -349,6 +350,8 @@ int __cpu_up(unsigned int cpu)
>      if ( rc < 0 )
>          return rc;
>  
> +    console_start_sync(); /* Secondary may use early_printk */
> +
>      /* Tell the remote CPU which stack to boot on. */
>      init_data.stack = idle_vcpu[cpu]->arch.stack;
>  
> @@ -361,6 +364,8 @@ int __cpu_up(unsigned int cpu)
>  
>      rc = arch_cpu_up(cpu);
>  
> +    console_end_sync();
> +
>      if ( rc < 0 )
>      {
>          printk("Failed to bring up CPU%d\n", cpu);
> -- 
> 1.7.10.4
> 

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel