[Xen-devel] [PATCH 5/8] xen/arm: p2m: Add p2m_get_entry

[Julien Grall <julien.grall@xxxxxxxxxx>]

Reuse the code of p2m_lookup and add an argument to retrieve the p2m type.

Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx>
---
 xen/arch/arm/p2m.c        |   11 ++++++++++-
 xen/include/asm-arm/p2m.h |    7 ++++++-
 2 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/xen/arch/arm/p2m.c b/xen/arch/arm/p2m.c
index 5449a35..1ae2521 100644
--- a/xen/arch/arm/p2m.c
+++ b/xen/arch/arm/p2m.c
@@ -71,11 +71,17 @@ static lpae_t *p2m_map_first(struct p2m_domain *p2m, 
paddr_t addr)
  * There are no processor functions to do a stage 2 only lookup therefore we
  * do a a software walk.
  */
-paddr_t p2m_lookup(struct domain *d, paddr_t paddr)
+paddr_t p2m_get_entry(struct domain *d, paddr_t paddr, p2m_type_t *t)
 {
     struct p2m_domain *p2m = &d->arch.p2m;
     lpae_t pte, *first = NULL, *second = NULL, *third = NULL;
     paddr_t maddr = INVALID_PADDR;
+    p2m_type_t _t;
+
+    /* Allow t to be NULL */
+    t = t ?: &_t;
+
+    *t = p2m_invalid;
 
     spin_lock(&p2m->lock);
 
@@ -99,7 +105,10 @@ paddr_t p2m_lookup(struct domain *d, paddr_t paddr)
 
 done:
     if ( pte.p2m.valid )
+    {
         maddr = (pte.bits & PADDR_MASK & PAGE_MASK) | (paddr & ~PAGE_MASK);
+        *t = pte.p2m.avail;
+    }
 
     if (third) unmap_domain_page(third);
     if (second) unmap_domain_page(second);
diff --git a/xen/include/asm-arm/p2m.h b/xen/include/asm-arm/p2m.h
index 1cf7d36..3de69c4 100644
--- a/xen/include/asm-arm/p2m.h
+++ b/xen/include/asm-arm/p2m.h
@@ -49,7 +49,12 @@ int p2m_alloc_table(struct domain *d);
 void p2m_load_VTTBR(struct domain *d);
 
 /* Look up the MFN corresponding to a domain's PFN. */
-paddr_t p2m_lookup(struct domain *d, paddr_t gpfn);
+paddr_t p2m_get_entry(struct domain *d, paddr_t gpfn, p2m_type_t *t);
+
+static inline paddr_t p2m_lookup(struct domain *d, paddr_t gpfn)
+{
+    return p2m_get_entry(d, gpfn, NULL);
+}
 
 /* Setup p2m RAM mapping for domain d from start-end. */
 int p2m_populate_ram(struct domain *d, paddr_t start, paddr_t end);
-- 
1.7.10.4


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