linux-kernel - [PATCH 09/10] xen/mmu: Be aware of p2m_[mid

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Date:	Tue, 21 Dec 2010 16:37:39 -0500
From:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:	linux-kernel@...r.kernel.org, jeremy@...p.org, hpa@...or.com
Cc:	Jan Beulich <JBeulich@...ell.com>, xen-devel@...ts.xensource.com,
	Konrad Rzeszutek Wilk <konrad@...nel.org>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Subject: [PATCH 09/10] xen/mmu: Be aware of p2m_[mid_|]missing when saving/restore.

We did not consider the 1-1 mapping and during restore would
not properly deal with them.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
---
 arch/x86/xen/mmu.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)

diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index a917439..b2b8733 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -329,14 +329,13 @@ void xen_build_mfn_list_list(void)
 		 * they're just missing, just update the stored mfn,
 		 * since all could have changed over a migrate.
 		 */
-		if (mid == p2m_mid_identity) {
+		if (mid == p2m_mid_identity || mid == p2m_mid_missing) {
 			BUG_ON(mididx);
 			BUG_ON(mid_mfn_p != p2m_mid_identity_mfn);
 			p2m_top_mfn[topidx] = virt_to_mfn(p2m_mid_identity_mfn);
 			pfn += (P2M_MID_PER_PAGE - 1) * P2M_PER_PAGE;
 			continue;
 		}
-
 		if (mid_mfn_p == p2m_mid_identity_mfn) {
 			/*
 			 * XXX boot-time only!  We should never find
-- 
1.7.1

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