Re: [Qemu-devel] [RFC for 2.8 1/3] configure: check CPU width and disable larger guests

[Richard Henderson]

On 08/09/2016 09:25 PM, Alex Bennée wrote:
> -  ia64|ppc|ppc64|s390|s390x|sparc64|x32)
> +  ppc|s390|x32)
>      cpu="$cpu"
> +    cpu_width=32
> +  ;;
> +  ia64|ppc64|s390x|sparc64)
> +    cpu="$cpu"
> +    cpu_width=64
>    ;;
>    i386|i486|i586|i686|i86pc|BePC)
>      cpu="i386"
> +    cpu_width=32
>    ;;
>    x86_64|amd64)
>      cpu="x86_64"
> +    cpu_width=64
>    ;;
>    armv*b|armv*l|arm)
>      cpu="arm"
> +    cpu_width=32
>    ;;
>    aarch64)
>      cpu="aarch64"
> +    cpu_width=32
>    ;;
>    mips*)
>      cpu="mips"
>    ;;
>    sparc|sun4[cdmuv])
>      cpu="sparc"
> +    cpu_width=32

Note that x32 and sparc are both 64-bit hosts with 32-bit pointers (we don't 
support sparcv8 as a host anymore, just sparcv8+, aka sparcv9 in a 32-bit context).

Not that I believe these to be interesting hosts, since VMA space is half the 
battle when it comes to emulation.


r~