x86/p2m.c: fix missed off-by-one in altp2m commit

Signed-off-by: Ravi Sahita <ravi.sahita@intel.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>

diff --git a/xen/arch/x86/mm/p2m.c b/xen/arch/x86/mm/p2m.c
index ff8be31f46b1c24afce51b282ae4ffd81f578671..667b4c2f594cade296030bd2e4bf454af427195f 100644 (file)
--- a/xen/arch/x86/mm/p2m.c
+++ b/xen/arch/x86/mm/p2m.c
@@ -2076,7 +2076,7 @@ bool_t p2m_switch_vcpu_altp2m_by_id(struct vcpu *v, unsigned int idx)
     struct domain *d = v->domain;
     bool_t rc = 0;
 
-    if ( idx > MAX_ALTP2M )
+    if ( idx >= MAX_ALTP2M )
         return rc;
 
     altp2m_list_lock(d);