# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1231152108 0
# Node ID 0cd1ba8bd7cd4b91719503f102bc4f076aeb40c4
# Parent de38a475ab9e11185084ef17b180f9da1313bea5
PoD (populate-on-demand) memory 1/9: Add a p2m query type.
Signed-off-by: George Dunlap <george.dunlap@xxxxxxxxxxxxx>
---
xen/arch/x86/mm/hap/p2m-ept.c | 10 ++++---
xen/arch/x86/mm/p2m.c | 6 +++-
xen/include/asm-x86/guest_pt.h | 2 -
xen/include/asm-x86/p2m.h | 54 +++++++++++++++++++++++++++--------------
4 files changed, 47 insertions(+), 25 deletions(-)
diff -r de38a475ab9e -r 0cd1ba8bd7cd xen/arch/x86/mm/hap/p2m-ept.c
--- a/xen/arch/x86/mm/hap/p2m-ept.c Mon Dec 29 14:13:07 2008 +0000
+++ b/xen/arch/x86/mm/hap/p2m-ept.c Mon Jan 05 10:41:48 2009 +0000
@@ -274,7 +274,8 @@ out:
}
/* Read ept p2m entries */
-static mfn_t ept_get_entry(struct domain *d, unsigned long gfn, p2m_type_t *t)
+static mfn_t ept_get_entry(struct domain *d, unsigned long gfn, p2m_type_t *t,
+ p2m_query_t q)
{
ept_entry_t *table =
map_domain_page(mfn_x(pagetable_get_mfn(d->arch.phys_table)));
@@ -359,9 +360,10 @@ static uint64_t ept_get_entry_content(st
return content;
}
-static mfn_t ept_get_entry_current(unsigned long gfn, p2m_type_t *t)
-{
- return ept_get_entry(current->domain, gfn, t);
+static mfn_t ept_get_entry_current(unsigned long gfn, p2m_type_t *t,
+ p2m_query_t q)
+{
+ return ept_get_entry(current->domain, gfn, t, q);
}
void ept_change_entry_emt_with_range(struct domain *d, unsigned long start_gfn,
diff -r de38a475ab9e -r 0cd1ba8bd7cd xen/arch/x86/mm/p2m.c
--- a/xen/arch/x86/mm/p2m.c Mon Dec 29 14:13:07 2008 +0000
+++ b/xen/arch/x86/mm/p2m.c Mon Jan 05 10:41:48 2009 +0000
@@ -345,7 +345,8 @@ p2m_set_entry(struct domain *d, unsigned
}
static mfn_t
-p2m_gfn_to_mfn(struct domain *d, unsigned long gfn, p2m_type_t *t)
+p2m_gfn_to_mfn(struct domain *d, unsigned long gfn, p2m_type_t *t,
+ p2m_query_t q)
{
mfn_t mfn;
paddr_t addr = ((paddr_t)gfn) << PAGE_SHIFT;
@@ -436,7 +437,8 @@ p2m_gfn_to_mfn(struct domain *d, unsigne
}
/* Read the current domain's p2m table (through the linear mapping). */
-static mfn_t p2m_gfn_to_mfn_current(unsigned long gfn, p2m_type_t *t)
+static mfn_t p2m_gfn_to_mfn_current(unsigned long gfn, p2m_type_t *t,
+ p2m_query_t q)
{
mfn_t mfn = _mfn(INVALID_MFN);
p2m_type_t p2mt = p2m_mmio_dm;
diff -r de38a475ab9e -r 0cd1ba8bd7cd xen/include/asm-x86/guest_pt.h
--- a/xen/include/asm-x86/guest_pt.h Mon Dec 29 14:13:07 2008 +0000
+++ b/xen/include/asm-x86/guest_pt.h Mon Jan 05 10:41:48 2009 +0000
@@ -49,7 +49,7 @@ gfn_to_paddr(gfn_t gfn)
/* Override gfn_to_mfn to work with gfn_t */
#undef gfn_to_mfn
-#define gfn_to_mfn(d, g, t) _gfn_to_mfn((d), gfn_x(g), (t))
+#define gfn_to_mfn(d, g, t) _gfn_to_mfn_type((d), gfn_x(g), (t), p2m_alloc)
/* Types of the guest's page tables and access functions for them */
diff -r de38a475ab9e -r 0cd1ba8bd7cd xen/include/asm-x86/p2m.h
--- a/xen/include/asm-x86/p2m.h Mon Dec 29 14:13:07 2008 +0000
+++ b/xen/include/asm-x86/p2m.h Mon Jan 05 10:41:48 2009 +0000
@@ -66,6 +66,12 @@ typedef enum {
p2m_mmio_direct = 5, /* Read/write mapping of genuine MMIO area */
} p2m_type_t;
+typedef enum {
+ p2m_query = 0, /* Do not populate a PoD entries */
+ p2m_alloc = 1, /* Automatically populate PoD entries */
+ p2m_guest = 2, /* Guest demand-fault; implies alloc */
+} p2m_query_t;
+
/* We use bitmaps and maks to handle groups of types */
#define p2m_to_mask(_t) (1UL << (_t))
@@ -105,9 +111,11 @@ struct p2m_domain {
mfn_t mfn, unsigned int page_order,
p2m_type_t p2mt);
mfn_t (*get_entry )(struct domain *d, unsigned long gfn,
- p2m_type_t *p2mt);
+ p2m_type_t *p2mt,
+ p2m_query_t q);
mfn_t (*get_entry_current)(unsigned long gfn,
- p2m_type_t *p2mt);
+ p2m_type_t *p2mt,
+ p2m_query_t q);
void (*change_entry_type_global)(struct domain *d,
p2m_type_t ot,
p2m_type_t nt);
@@ -123,23 +131,26 @@ static inline p2m_type_t p2m_flags_to_ty
return (flags >> 9) & 0x7;
}
-/* Read the current domain's p2m table. */
-static inline mfn_t gfn_to_mfn_current(unsigned long gfn, p2m_type_t *t)
-{
- return current->domain->arch.p2m->get_entry_current(gfn, t);
-}
-
-/* Read another domain's P2M table, mapping pages as we go */
+/* Read the current domain's p2m table. Do not populate PoD pages. */
+static inline mfn_t gfn_to_mfn_type_current(unsigned long gfn, p2m_type_t *t,
+ p2m_query_t q)
+{
+ return current->domain->arch.p2m->get_entry_current(gfn, t, q);
+}
+
+/* Read another domain's P2M table, mapping pages as we go.
+ * Do not populate PoD pages. */
static inline
-mfn_t gfn_to_mfn_foreign(struct domain *d, unsigned long gfn, p2m_type_t *t)
-{
- return d->arch.p2m->get_entry(d, gfn, t);
+mfn_t gfn_to_mfn_type_foreign(struct domain *d, unsigned long gfn, p2m_type_t
*t,
+ p2m_query_t q)
+{
+ return d->arch.p2m->get_entry(d, gfn, t, q);
}
/* General conversion function from gfn to mfn */
-#define gfn_to_mfn(d, g, t) _gfn_to_mfn((d), (g), (t))
-static inline mfn_t _gfn_to_mfn(struct domain *d,
- unsigned long gfn, p2m_type_t *t)
+static inline mfn_t _gfn_to_mfn_type(struct domain *d,
+ unsigned long gfn, p2m_type_t *t,
+ p2m_query_t q)
{
if ( !paging_mode_translate(d) )
{
@@ -149,10 +160,17 @@ static inline mfn_t _gfn_to_mfn(struct d
return _mfn(gfn);
}
if ( likely(current->domain == d) )
- return gfn_to_mfn_current(gfn, t);
+ return gfn_to_mfn_type_current(gfn, t, q);
else
- return gfn_to_mfn_foreign(d, gfn, t);
-}
+ return gfn_to_mfn_type_foreign(d, gfn, t, q);
+}
+
+#define gfn_to_mfn(d, g, t) _gfn_to_mfn_type((d), (g), (t), p2m_alloc)
+#define gfn_to_mfn_query(d, g, t) _gfn_to_mfn_type((d), (g), (t), p2m_query)
+#define gfn_to_mfn_guest(d, g, t) _gfn_to_mfn_type((d), (g), (t), p2m_guest)
+
+#define gfn_to_mfn_current(g, t) gfn_to_mfn_type_current((g), (t), p2m_alloc)
+#define gfn_to_mfn_foreign(d, g, t) gfn_to_mfn_type_foreign((d), (g), (t),
p2m_alloc)
/* Compatibility function exporting the old untyped interface */
static inline unsigned long gmfn_to_mfn(struct domain *d, unsigned long gpfn)
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