Re: [Xen-devel] [RFC PATCH v2 17/22] xen/arm: its: Map ITS translation space

2015-03-27 Thread Julien Grall
Hello Vijay, On 19/03/15 14:38, vijay.kil...@gmail.com wrote: > +/* > + * Map the 64K ITS translation space in guest. > + * This is required purely for device smmu writes. > +*/ Could this be avoid if the SMMU is not present? > + > +static int vgic_map_translation_space(uint32_t nr_its, struct d

[Xen-devel] [RFC PATCH v2 17/22] xen/arm: its: Map ITS translation space

2015-03-19 Thread vijay . kilari
From: Vijaya Kumar K ITS translation space contains GITS_TRANSLATOR register which is written by device to raise LPI. This space needs to mapped to every domain address space for all physical ITS available, so that device can access GITS_TRANSLATOR register using SMMU. Signed-off-by: Vijaya Kuma