* [Qemu-devel] [PATCH] SVM: Fix segment attribute clobbering
@ 2008-06-09 12:42 Alexander Graf
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From: Alexander Graf @ 2008-06-09 12:42 UTC (permalink / raw)
To: qemu-devel
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When SVM segment flags get stored in the VMCB, there is a certain chance
that they get clobbered by garbage bits. This patch ANDs the wanted bits
correctly and thus makes SVM work again.
Alex
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Index: target-i386/op_helper.c
===================================================================
--- target-i386/op_helper.c (revision 4707)
+++ target-i386/op_helper.c (working copy)
@@ -4767,7 +4767,7 @@
stl_phys(addr + offsetof(struct vmcb_seg, limit),
sc->limit);
stw_phys(addr + offsetof(struct vmcb_seg, attrib),
- (sc->flags >> 8) | ((sc->flags >> 12) & 0x0f00));
+ ((sc->flags >> 8) & 0xff) | ((sc->flags >> 12) & 0x0f00));
}
static inline void svm_load_seg(target_phys_addr_t addr, SegmentCache *sc)
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2008-06-09 12:42 [Qemu-devel] [PATCH] SVM: Fix segment attribute clobbering Alexander Graf
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