This allocation function is used by the deprivileged mode initialisation code
to allocate pages for the new page table mappings and page frames on the HAP
page heap.
Signed-off-by: Ben Catterall <ben.catter...@citrix.com>
---
xen/arch/x86/mm/hap/hap.c | 23 +++++++++++++++++++++++
xen/include/asm-x86/domain.h | 1 +
xen/include/asm-x86/hap.h | 5 +++++
3 files changed, 29 insertions(+)
diff --git a/xen/arch/x86/mm/hap/hap.c b/xen/arch/x86/mm/hap/hap.c
index d375c4d..593cba7 100644
--- a/xen/arch/x86/mm/hap/hap.c
+++ b/xen/arch/x86/mm/hap/hap.c
@@ -844,6 +844,29 @@ static const struct paging_mode hap_paging_long_mode = {
.guest_levels = 4
};
+/************************************************/
+/* HAP HVM functions */
+/************************************************/
+struct page_info *hvm_alloc_page(struct domain *d)
+{
+ struct page_info *pg;
+
+ if( (pg = hap_alloc(d)) == NULL )
+ {
+ HAP_ERROR("HVM: Out of memory allocating HVM page\n");
+ domain_crash(d);
+ return NULL;
+ }
+
+ ASSERT(paging_locked_by_me(d));
+
+ /* Track our used pages */
+ page_list_add(pg, &d->arch.paging.hap.hvmlist);
+
+ return pg;
+}
+
+
/*
* Local variables:
* mode: C
diff --git a/xen/include/asm-x86/domain.h b/xen/include/asm-x86/domain.h
index 0fce09e..c46a31a 100644
--- a/xen/include/asm-x86/domain.h
+++ b/xen/include/asm-x86/domain.h
@@ -154,6 +154,7 @@ struct shadow_vcpu {
/************************************************/
struct hap_domain {
struct page_list_head freelist;
+ struct page_list_head hvmlist; /* HVM usermode page allocation */
unsigned int total_pages; /* number of pages allocated */
unsigned int free_pages; /* number of pages on freelists */
unsigned int p2m_pages; /* number of pages allocates to p2m */
diff --git a/xen/include/asm-x86/hap.h b/xen/include/asm-x86/hap.h
index bd87481..0432eb5 100644
--- a/xen/include/asm-x86/hap.h
+++ b/xen/include/asm-x86/hap.h
@@ -48,6 +48,11 @@ int hap_track_dirty_vram(struct domain *d,
extern const struct paging_mode *hap_paging_get_mode(struct vcpu *);
void hap_set_alloc_for_pvh_dom0(struct domain *d, unsigned long num_pages);
+/************************************************/
+/* hap HVM functions */
+/************************************************/
+
+struct page_info *hvm_alloc_page(struct domain *d);
#endif /* XEN_HAP_H */
/*
--
2.1.4
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