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[Xen-devel] [PATCH] x86emulate - fix unintended writeback on cmp/test in
| To: | xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, "Keir Fraser" <keir.fraser@xxxxxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] [PATCH] x86emulate - fix unintended writeback on cmp/test instructions |
| From: | "Trolle Selander" <trolle.selander@xxxxxxxxx> |
| Date: | Fri, 25 Jul 2008 12:00:45 +0100 |
| Cc: | |
| Delivery-date: | Fri, 25 Jul 2008 04:01:07 -0700 |
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This patch fixes an issue when x86_emulate is called with force_writeback=1 set. It resulted in cmp and test instructions with memory operands to have the mem value written back after instruction emulation finished. This caused false alarms on writes to RO mem, and might have caused other issues if unintended writes occured to device registers in mmio space.
Signed-off-by: Trolle Selander <trolle.selander@xxxxxxxxxxxxx <mailto:trolle.selander@xxxxxxxxxxxxx>
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