[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH v3 47/62] arm/p2m: Add helper functions to map memory regions
On Tue, 17 Nov 2015, shannon.zhao@xxxxxxxxxx wrote: > From: Parth Dixit <parth.dixit@xxxxxxxxxx> > > Create a helper function for mapping with cached attributes. > > Signed-off-by: Parth Dixit <parth.dixit@xxxxxxxxxx> > Signed-off-by: Shannon Zhao <shannon.zhao@xxxxxxxxxx> You might be able to use the existing guest_physmap_add_entry and guest_physmap_remove_page for your purposes. > xen/arch/arm/p2m.c | 26 ++++++++++++++++++++++++++ > xen/include/asm-arm/p2m.h | 10 ++++++++++ > 2 files changed, 36 insertions(+) > > diff --git a/xen/arch/arm/p2m.c b/xen/arch/arm/p2m.c > index e396c40..7a108d8 100644 > --- a/xen/arch/arm/p2m.c > +++ b/xen/arch/arm/p2m.c > @@ -1140,6 +1140,32 @@ int p2m_populate_ram(struct domain *d, > d->arch.p2m.default_access); > } > > +int map_regions(struct domain *d, > + unsigned long start_gfn, > + unsigned long nr, > + unsigned long mfn) > +{ > + return apply_p2m_changes(d, INSERT, > + pfn_to_paddr(start_gfn), > + pfn_to_paddr(start_gfn + nr), > + pfn_to_paddr(mfn), > + MATTR_MEM, 0, p2m_mmio_direct, > + d->arch.p2m.default_access); > +} > + > +int unmap_regions(struct domain *d, > + unsigned long start_gfn, > + unsigned long nr, > + unsigned long mfn) > +{ > + return apply_p2m_changes(d, REMOVE, > + pfn_to_paddr(start_gfn), > + pfn_to_paddr(start_gfn + nr), > + pfn_to_paddr(mfn), > + MATTR_MEM, 0, p2m_invalid, > + d->arch.p2m.default_access); > +} > + > int map_mmio_regions(struct domain *d, > unsigned long start_gfn, > unsigned long nr, > diff --git a/xen/include/asm-arm/p2m.h b/xen/include/asm-arm/p2m.h > index 08bdce3..b6215f9 100644 > --- a/xen/include/asm-arm/p2m.h > +++ b/xen/include/asm-arm/p2m.h > @@ -158,6 +158,16 @@ int p2m_cache_flush(struct domain *d, xen_pfn_t > start_mfn, xen_pfn_t end_mfn); > /* Setup p2m RAM mapping for domain d from start-end. */ > int p2m_populate_ram(struct domain *d, paddr_t start, paddr_t end); > > +int map_regions(struct domain *d, > + unsigned long start_gfn, > + unsigned long nr_mfns, > + unsigned long mfn); > + > +int unmap_regions(struct domain *d, > + unsigned long start_gfn, > + unsigned long nr_mfns, > + unsigned long mfn); > + > int guest_physmap_add_entry(struct domain *d, > unsigned long gfn, > unsigned long mfn, > -- > 2.1.0 > _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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