* How to ioremap a range of reserved memory uncache, and can be accessed both in xen and domain 0 kernel space
@ 2012-03-03 12:41 bryantclc
0 siblings, 0 replies; only message in thread
From: bryantclc @ 2012-03-03 12:41 UTC (permalink / raw)
To: xen-devel
Hi,
I want implement a driver in domain 0, it needs to ioremap a range of
reserved memory, and set it uncachable. Further more, the remaped memory
needs to be accessed by xen, since I want xen to put some data in it, then
the driver in domain 0 could get these data. I want to set it uncachable,
make it not pollute the cache.
Our system is x86_64 platform, xen-3.4.3, and the domain 0 kernel is
linux-2.6.18.8. I have tried to use ioremap the reserved machine memory into
domain 0 directly, and it seems to ok, but how could I make it accessable by
xen?
Then I try to call ioremap in xen, the xen would crash and reboot.
Could someone give some suggestions to solve this problem?
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2012-03-03 12:41 How to ioremap a range of reserved memory uncache, and can be accessed both in xen and domain 0 kernel space bryantclc
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