[Xen-changelog] [xen master] xen/arm: p2m: Introduce a helper to check if an entry is a superpage

[patchbot@xxxxxxx]

commit a48a40e92f470cb8e41dd89b3a2b61e8d7c178e4
Author:     Julien Grall <julien.grall@xxxxxxx>
AuthorDate: Thu Sep 15 12:28:32 2016 +0100
Commit:     Stefano Stabellini <sstabellini@xxxxxxxxxx>
CommitDate: Tue Sep 27 18:14:08 2016 -0700

    xen/arm: p2m: Introduce a helper to check if an entry is a superpage
    
    Use the level and the entry to know whether an entry is a superpage.
    A superpage can only happen below level 3.
    
    Signed-off-by: Julien Grall <julien.grall@xxxxxxx>
    Reviewed-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
    Tested-by: Tamas K Lengyel <tamas@xxxxxxxxxxxxx>
---
 xen/arch/arm/p2m.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/xen/arch/arm/p2m.c b/xen/arch/arm/p2m.c
index c5695ef..02ee9c1 100644
--- a/xen/arch/arm/p2m.c
+++ b/xen/arch/arm/p2m.c
@@ -57,6 +57,11 @@ static inline bool_t p2m_mapping(lpae_t pte)
     return p2m_valid(pte) && !pte.p2m.table;
 }
 
+static inline bool p2m_is_superpage(lpae_t pte, unsigned int level)
+{
+    return (level < 3) && p2m_mapping(pte);
+}
+
 static inline void p2m_write_lock(struct p2m_domain *p2m)
 {
     write_lock(&p2m->lock);
--
generated by git-patchbot for /home/xen/git/xen.git#master

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