[PATCH 3/6] IOPL handling for paravirt guests

2006-12-14 Thread Zachary Amsden
I found a clever way to make the extra IOPL switching invisible to non-paravirt compiles - since kernel_rpl is statically defined to be zero there, and only non-zero rpl kernel have a problem restoring IOPL, as popf does not restore IOPL flags unless run at CPL-0. Subject: IOPL handling for

[PATCH 3/6] IOPL handling for paravirt guests

2006-12-14 Thread Zachary Amsden
I found a clever way to make the extra IOPL switching invisible to non-paravirt compiles - since kernel_rpl is statically defined to be zero there, and only non-zero rpl kernel have a problem restoring IOPL, as popf does not restore IOPL flags unless run at CPL-0. Subject: IOPL handling for