Hi, I am currently doing some study about hvm IO behavior.
I encounter a strange thing that hvm tries to access a page owned to dom0
when it executes disk io instructions like "rep ins/outs".
Here is my console output message:
(XEN) [M]emulate.c:384 ===Warning!! dst_ma=0x1ed0fa400,
domain_id=0 rip=0xffffffff812a38fb size=0x200.
(XEN) insns: f3 66 6d 5b. pite=0x80000000
domain id = 0 means it''s a page of dom0 but rip is in the address space
of
domU, its instructions are f3 66 6d 5b.
I am confusing why hvm need to put its disk data into dom0 memory space, is
it a shared page? what do they share with this page?
Thanks for any reply.
--
陈进
电话：+86-21-51355360
复旦大学并行处理研究所
上海浦东新区张衡路825号，软件楼320
Jin Chen
Phone: +86-21-51355360
Room 320, Software Building
No. 825, Zhangheng Road
Pudong District, Shanghai
--
陈进
电话：+86-21-51355360
复旦大学并行处理研究所
上海浦东新区张衡路825号，软件楼320
Jin Chen
Phone: +86-21-51355360
Room 320, Software Building
No. 825, Zhangheng Road
Pudong District, Shanghai
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xensource.com
http://lists.xensource.com/xen-devel