[PATCH v3 47/62] arm/p2m: Add helper functions to map memory regions
shannon.zhao at linaro.org
shannon.zhao at linaro.org
Tue Nov 17 01:40:46 PST 2015
From: Parth Dixit <parth.dixit at linaro.org>
Create a helper function for mapping with cached attributes.
Signed-off-by: Parth Dixit <parth.dixit at linaro.org>
Signed-off-by: Shannon Zhao <shannon.zhao at linaro.org>
---
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
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