Re: [Xen-devel] [PATCH 2/6] xen/arm: implement get_maximum_gpfn hypercall

[Wei Huang <w1.huang@xxxxxxxxxxx>]

On 04/10/2014 12:28 PM, Andrew Cooper wrote:
> On 10/04/14 17:48, Wei Huang wrote:
> > From: Jaeyong Yoo <jaeyong.yoo@xxxxxxxxxxx>
> >
> > This patchi implements get_maximum_gpfn by using the memory map
> > info in arch_domain (from set_memory_map hypercall).
> >
> > Signed-off-by: Evgeny Fedotov <e.fedotov@xxxxxxxxxxx>
> Common implementation and a specific arch_get_maximum_gpfn() ?
>
> ~Andrew
Yes, will do.
> > ---
> >   xen/arch/arm/mm.c        | 19 ++++++++++++++++++-
> >   xen/include/asm-arm/mm.h |  2 ++
> >   2 files changed, 20 insertions(+), 1 deletion(-)
> >
> > diff --git a/xen/arch/arm/mm.c b/xen/arch/arm/mm.c
> > index 362bc8d..14b4686 100644
> > --- a/xen/arch/arm/mm.c
> > +++ b/xen/arch/arm/mm.c
> > @@ -947,7 +947,11 @@ int page_is_ram_type(unsigned long mfn, unsigned long 
> > mem_type)
> >
> >   unsigned long domain_get_maximum_gpfn(struct domain *d)
> >   {
> > -    return -ENOSYS;
> > +    paddr_t end;
> > +
> > +    get_gma_start_end(d, NULL, &end);
> > +
> > +    return (unsigned long) (end >> PAGE_SHIFT);
> >   }
> >
> >   void share_xen_page_with_guest(struct page_info *page,
> > @@ -1235,6 +1239,19 @@ int is_iomem_page(unsigned long mfn)
> >           return 1;
> >       return 0;
> >   }
> > +
> > +/*
> > + * Return start and end addresses of guest
> > + */
> > +void get_gma_start_end(struct domain *d, paddr_t *start, paddr_t *end)
> > +{
> > +    if ( start )
> > +        *start = GUEST_RAM_BASE;
> > +
> > +    if ( end )
> > +        *end = GUEST_RAM_BASE + ((paddr_t) d->max_pages << PAGE_SHIFT);
> > +}
> > +
> >   /*
> >    * Local variables:
> >    * mode: C
> > diff --git a/xen/include/asm-arm/mm.h b/xen/include/asm-arm/mm.h
> > index b8d4e7d..341493a 100644
> > --- a/xen/include/asm-arm/mm.h
> > +++ b/xen/include/asm-arm/mm.h
> > @@ -341,6 +341,8 @@ static inline void put_page_and_type(struct page_info *page)
> >       put_page(page);
> >   }
> >
> > +void get_gma_start_end(struct domain *d, paddr_t *start, paddr_t *end);
> > +
> >   #endif /*  __ARCH_ARM_MM__ */
> >   /*
> >    * Local variables:

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel