[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