[Xen-devel] [PATCH v8 04/17] xen/x86: allow __set_phys_to_machine for autotranslate guests

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

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 <stefano.stabellini@xxxxxxxxxxxxx>
---
 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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