Thread (22 messages) 22 messages, 2 authors, 2013-10-15
STALE4621d
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[PATCH v8 04/17] xen/x86: allow __set_phys_to_machine for autotranslate guests

From: Stefano Stabellini <hidden>
Date: 2013-10-09 20:51:46
Also in: lkml, xen-devel
Subsystem: the rest, x86 architecture (32-bit and 64-bit), xen hypervisor x86 · Maintainers: Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen, Juergen Gross

Allow __set_phys_to_machine to be called for autotranslate guests.
It can be used to keep track of phys_to_machine changes, however we
don't do anything with the information at the moment.

Signed-off-by: Stefano Stabellini <redacted>
---
 arch/x86/xen/p2m.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/x86/xen/p2m.c b/arch/x86/xen/p2m.c
index 95fb2aa..59d9e70 100644
--- a/arch/x86/xen/p2m.c
+++ b/arch/x86/xen/p2m.c
@@ -798,10 +798,10 @@ bool __set_phys_to_machine(unsigned long pfn, unsigned long mfn)
 {
 	unsigned topidx, mididx, idx;
 
-	if (unlikely(xen_feature(XENFEAT_auto_translated_physmap))) {
-		BUG_ON(pfn != mfn && mfn != INVALID_P2M_ENTRY);
+	/* don't track P2M changes in autotranslate guests */
+	if (unlikely(xen_feature(XENFEAT_auto_translated_physmap)))
 		return true;
-	}
+
 	if (unlikely(pfn >= MAX_P2M_PFN)) {
 		BUG_ON(mfn != INVALID_P2M_ENTRY);
 		return true;
-- 
1.7.2.5
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