[v8,09/21] arm/p2m: Add helper functions to map memory regions

Commit Message

Shannon Zhao March 30, 2016, 10:08 a.m. UTC

From: Parth Dixit <[e-mail]>

Create a helper function for mapping with cached attributes and
read-write range.

Signed-off-by: Parth Dixit <[e-mail]>
Signed-off-by: Shannon Zhao <[e-mail]>
Reviewed-by: Stefano Stabellini <[e-mail]>
Acked-by: Julien Grall <[e-mail]>
---
 xen/arch/arm/p2m.c        | 26 ++++++++++++++++++++++++++
 xen/include/asm-arm/p2m.h | 10 ++++++++++
 2 files changed, 36 insertions(+)

Patch

diff --git a/xen/arch/arm/p2m.c b/xen/arch/arm/p2m.c
index a2a9c4b..7e5f5d1 100644
--- a/xen/arch/arm/p2m.c
+++ b/xen/arch/arm/p2m.c
@@ -1218,6 +1218,32 @@  int p2m_populate_ram(struct domain *d,
                              d->arch.p2m.default_access);
 }
 
+int map_regions_rw_cache(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,
+                             p2m_access_rw);
+}
+
+int unmap_regions_rw_cache(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,
+                             p2m_access_rw);
+}
+
 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 433952a..55626b4 100644
--- a/xen/include/asm-arm/p2m.h
+++ b/xen/include/asm-arm/p2m.h
@@ -144,6 +144,16 @@  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_rw_cache(struct domain *d,
+                         unsigned long start_gfn,
+                         unsigned long nr_mfns,
+                         unsigned long mfn);
+
+int unmap_regions_rw_cache(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,