Re: [Qemu-devel] [PULL 22/42] configure: factor out list of supported Xen/KVM/HAX targets

[Paolo Bonzini]

On 10/07/2017 17:49, Peter Maydell wrote:
> On 5 July 2017 at 08:14, Paolo Bonzini <address@hidden> wrote:
>> This will be useful when the functions are called, early in the configure
>> process, to filter out targets that do not support hardware acceleration.
>>
>> Signed-off-by: Paolo Bonzini <address@hidden>
> 
>> +supported_xen_target() {
>> +    test "$xen" = "yes" || return 1
>> +    glob "$1" "*-softmmu" || return 1
>> +    case "${1%-softmmu}:$cpu" in
>> +        arm:arm | aarch64:aarch64 | \
>> +        i386:i386 | i386:x86_64 | x86_64:i386 | x86_64:x86_64)
>> +            return 0
>> +        ;;
> 
> This says that arm-on-arm and aarch64-on-aarch64 are supported
> Xen targets...

Hmm, this comes from my old patches.  IIRC the reason for the change,
when it wasn't a change (many conflicts ago) was that Xen folks were
using --disable-tcg because their device model for Xen PV on ARM was
actually an x86_64 QEMU.

Stefano and Anthony, is this still true?  If so, would it make sense to
add the Xen PV machine type to qemu-system-arm---that is, is it
something you can whip up easily, or should I just remove that line?

Paolo

> Alex points out that the shippable builds now fail for aarch64
> and arm. (I think that my test machines for aarch64 and arm
> don't fail like this because they happen not to have the Xen
> headers installed, so the overall "does Xen work on this host"
> check fails; the shippable configs do pass that test so they
> try to build the Xen code.)