Chuck Ebbert wrote:
In-Reply-To: <[email protected]>
On Tue, 12 Dec 2006 14:54:30 -0800, Chros Wright wrote:
--- a/arch/i386/kernel/process.c Tue Dec 12 13:50:50 2006 -0800
+++ b/arch/i386/kernel/process.c Tue Dec 12 13:50:53 2006 -0800
@@ -665,6 +665,37 @@ struct task_struct fastcall * __switch_t
load_TLS(next, cpu);
/*
+ * Restore IOPL if needed.
+ */
+ if (unlikely(prev->iopl != next->iopl))
+ set_iopl_mask(next->iopl);
Small sidenote that this bit undoes a recent change from Chuck Ebbert, which
killed iopl_mask update via hypervisor.
This whole thing needs a proper fix IMO. I posted something a while back
but Andi didn't like it, I guess.
We can handle this one with an #ifdef CONFIG_PARAVIRT, though.
Zach
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