Re: [Xen-devel] [PATCH] x86: convert BUG_ON()s to WARN_ON()s in read_descriptor()

[Keir Fraser <keir@xxxxxxx>]

On 15/12/2011 10:25, "Jan Beulich" <JBeulich@xxxxxxxx> wrote:

> In the light of AMD erratum #700, and given that these checks happen
> for debugging purposes only and also only in debug builds of the
> hypervisor, make the failures non-fatal.
> 
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

Is this erratum published?

> --- a/xen/arch/x86/traps.c
> +++ b/xen/arch/x86/traps.c
> @@ -1544,11 +1544,11 @@ static int read_descriptor(unsigned int
>              asm volatile (
>                  "larl %2,%0 ; setz %1"
>                  : "=r" (a), "=qm" (valid) : "rm" (sel));
> -            BUG_ON(valid && ((a & 0x00f0ff00) != *ar));
> +            WARN_ON(valid && ((a & 0x00f0ff00) != *ar));
>              asm volatile (
>                  "lsll %2,%0 ; setz %1"
>                  : "=r" (l), "=qm" (valid) : "rm" (sel));
> -            BUG_ON(valid && (l != *limit));
> +            WARN_ON(valid && (l != *limit));
>          }
>  #endif
>      }
> 
> 
> 
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