| Message ID | 1470418562-11234-14-git-send-email-jgross@suse.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Juergen Gross, on Fri 05 Aug 2016 19:35:57 +0200, wrote: > Add a function to map one physical frame to a specified virtual > address as read/write. This will be used later multiple times. > > Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Samuel Thibault <samuel.thibault@ens-lyon.org> > --- > include/arm/arch_mm.h | 2 ++ > include/mm.h | 1 + > mm.c | 5 +++++ > 3 files changed, 8 insertions(+) > > diff --git a/include/arm/arch_mm.h b/include/arm/arch_mm.h > index 085d4e5..f4685d8 100644 > --- a/include/arm/arch_mm.h > +++ b/include/arm/arch_mm.h > @@ -14,6 +14,8 @@ extern uint32_t physical_address_offset; /* Add this to a virtual address to get > > #define L1_PAGETABLE_SHIFT 12 > > +#define L1_PROT 0 > + > #define to_phys(x) (((paddr_t)(x)+physical_address_offset) & 0xffffffff) > #define to_virt(x) ((void *)(((x)-physical_address_offset) & 0xffffffff)) > > diff --git a/include/mm.h b/include/mm.h > index 9244e26..6add683 100644 > --- a/include/mm.h > +++ b/include/mm.h > @@ -72,6 +72,7 @@ int do_map_frames(unsigned long addr, > const unsigned long *f, unsigned long n, unsigned long stride, > unsigned long increment, domid_t id, int *err, unsigned long prot); > int unmap_frames(unsigned long va, unsigned long num_frames); > +int map_frame_rw(unsigned long addr, unsigned long mfn); > #ifdef HAVE_LIBC > extern unsigned long heap, brk, heap_mapped, heap_end; > #endif > diff --git a/mm.c b/mm.c > index ff071ca..fd66115 100644 > --- a/mm.c > +++ b/mm.c > @@ -319,6 +319,11 @@ int free_physical_pages(xen_pfn_t *mfns, int n) > return HYPERVISOR_memory_op(XENMEM_decrease_reservation, &reservation); > } > > +int map_frame_rw(unsigned long addr, unsigned long mfn) > +{ > + return do_map_frames(addr, &mfn, 1, 1, 1, DOMID_SELF, NULL, L1_PROT); > +} > + > #ifdef HAVE_LIBC > void *sbrk(ptrdiff_t increment) > { > -- > 2.6.6 >
diff --git a/include/arm/arch_mm.h b/include/arm/arch_mm.h index 085d4e5..f4685d8 100644 --- a/include/arm/arch_mm.h +++ b/include/arm/arch_mm.h @@ -14,6 +14,8 @@ extern uint32_t physical_address_offset; /* Add this to a virtual address to get #define L1_PAGETABLE_SHIFT 12 +#define L1_PROT 0 + #define to_phys(x) (((paddr_t)(x)+physical_address_offset) & 0xffffffff) #define to_virt(x) ((void *)(((x)-physical_address_offset) & 0xffffffff)) diff --git a/include/mm.h b/include/mm.h index 9244e26..6add683 100644 --- a/include/mm.h +++ b/include/mm.h @@ -72,6 +72,7 @@ int do_map_frames(unsigned long addr, const unsigned long *f, unsigned long n, unsigned long stride, unsigned long increment, domid_t id, int *err, unsigned long prot); int unmap_frames(unsigned long va, unsigned long num_frames); +int map_frame_rw(unsigned long addr, unsigned long mfn); #ifdef HAVE_LIBC extern unsigned long heap, brk, heap_mapped, heap_end; #endif diff --git a/mm.c b/mm.c index ff071ca..fd66115 100644 --- a/mm.c +++ b/mm.c @@ -319,6 +319,11 @@ int free_physical_pages(xen_pfn_t *mfns, int n) return HYPERVISOR_memory_op(XENMEM_decrease_reservation, &reservation); } +int map_frame_rw(unsigned long addr, unsigned long mfn) +{ + return do_map_frames(addr, &mfn, 1, 1, 1, DOMID_SELF, NULL, L1_PROT); +} + #ifdef HAVE_LIBC void *sbrk(ptrdiff_t increment) {
Add a function to map one physical frame to a specified virtual address as read/write. This will be used later multiple times. Signed-off-by: Juergen Gross <jgross@suse.com> --- include/arm/arch_mm.h | 2 ++ include/mm.h | 1 + mm.c | 5 +++++ 3 files changed, 8 insertions(+)