[RFC,for-next,02/18] xen/x86: Make hap_get_allocation accessible

Commit Message

Tamas K Lengyel Sept. 25, 2019, 3:48 p.m. UTC

During VM forking we'll copy the parent domain's parameters to the client,
including the HAP shadow memory setting that is used for storing the domain's
EPT. We'll copy this in the hypervisor instead doing it during toolstack launch
to allow the domain to start executing and unsharing memory before (or
even completely without) the toolstack.

Signed-off-by: Tamas K Lengyel <[e-mail]>
---
 xen/arch/x86/mm/hap/hap.c | 3 +--
 xen/include/asm-x86/hap.h | 1 +
 2 files changed, 2 insertions(+), 2 deletions(-)

Patch

diff --git a/xen/arch/x86/mm/hap/hap.c b/xen/arch/x86/mm/hap/hap.c
index 412a442b6a..83a67470cf 100644
--- a/xen/arch/x86/mm/hap/hap.c
+++ b/xen/arch/x86/mm/hap/hap.c
@@ -321,8 +321,7 @@  static void hap_free_p2m_page(struct domain *d, struct page_info *pg)
 }
 
 /* Return the size of the pool, rounded up to the nearest MB */
-static unsigned int
-hap_get_allocation(struct domain *d)
+unsigned int hap_get_allocation(struct domain *d)
 {
     unsigned int pg = d->arch.paging.hap.total_pages
         + d->arch.paging.hap.p2m_pages;
diff --git a/xen/include/asm-x86/hap.h b/xen/include/asm-x86/hap.h
index b94bfb4ed0..1bf07e49fe 100644
--- a/xen/include/asm-x86/hap.h
+++ b/xen/include/asm-x86/hap.h
@@ -45,6 +45,7 @@  int   hap_track_dirty_vram(struct domain *d,
 
 extern const struct paging_mode *hap_paging_get_mode(struct vcpu *);
 int hap_set_allocation(struct domain *d, unsigned int pages, bool *preempted);
+unsigned int hap_get_allocation(struct domain *d);
 
 #endif /* XEN_HAP_H */