From: Christoph Egger <Christoph.Egger@amd.com>
Date: Mon, 22 Aug 2011 13:37:29 +0000 (+0100)
Subject: nested-p2m: suppress np2m flushes during p2m setup
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~9948
X-Git-Url: https://dgit.raspbian.org/%22http:/www.example.com/cgi/%22https:/%22bookmarks://%22/%22http:/www.example.com/cgi/%22https:/%22bookmarks:/%22?a=commitdiff_plain;h=e7fc68d87470c10fd27228a68c03418fa75c05f3;p=xen.git

nested-p2m: suppress np2m flushes during p2m setup

There is no need to send IPIs within p2m_alloc_table() via
set_p2m_entry().

Signed-off-by: Christoph Egger <Christoph.Egger@amd.com>
Committed-by: Tim Deegan <tim@xen.org>
---

diff --git a/xen/arch/x86/mm/p2m.c b/xen/arch/x86/mm/p2m.c
index 26e53e74b1..3ae5a49752 100644
--- a/xen/arch/x86/mm/p2m.c
+++ b/xen/arch/x86/mm/p2m.c
@@ -245,6 +245,7 @@ int p2m_alloc_table(struct p2m_domain *p2m)
     P2M_PRINTK("populating p2m table\n");
 
     /* Initialise physmap tables for slot zero. Other code assumes this. */
+    p2m->defer_nested_flush = 1;
     if ( !set_p2m_entry(p2m, 0, _mfn(INVALID_MFN), 0,
                         p2m_invalid, p2m->default_access) )
         goto error;
@@ -272,6 +273,7 @@ int p2m_alloc_table(struct p2m_domain *p2m)
         }
         spin_unlock(&p2m->domain->page_alloc_lock);
     }
+    p2m->defer_nested_flush = 0;
 
     P2M_PRINTK("p2m table initialised (%u pages)\n", page_count);
     p2m_unlock(p2m);