[PATCH v3 59/62] xen/arm: Add a hypercall for device mmio mapping

[Jan Beulich]

>>> On 07.01.16 at 07:58, <zhaoshenglong at huawei.com> wrote:
> On 2015/11/17 19:04, Jan Beulich wrote:
>>>>> On 17.11.15 at 10:40, <shannon.zhao at linaro.org> wrote:
>>> > --- a/xen/arch/arm/mm.c
>>> > +++ b/xen/arch/arm/mm.c
>>> > @@ -1138,6 +1138,10 @@ int xenmem_add_to_physmap_one(
>>> >          rcu_unlock_domain(od);
>>> >          break;
>>> >      }
>>> > +    case XENMAPSPACE_dev_mmio:
>>> > +        rc = map_dev_mmio_region(d, gpfn, 1, idx);
>>> > +        return rc;
>>> > +        break;
>> Blindly for any kind of domain? The XSM check in the
>> XENMEM_add_to_physmap_batch handler (in common code) doesn't
>> even know which map space is to be used...
> 
> Sorry, I know little about XSM. Could you suggest me how to add the
> check for this new type here?

I'm sorry to push back here, but did you at least try to derive
what is wanted from the multitude of other XSM checks present
throughout the tree?

Jan