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[Xen-devel] Sharing a page between Dom0 and DomU

from [anurag tripathi] [Permanent Link][Original]

To:	xen-devel@xxxxxxxxxxxxxxxxxxx
Subject:	[Xen-devel] Sharing a page between Dom0 and DomU
From:	"anurag tripathi" <anurag.iitg@xxxxxxxxx>
Date:	2008年10月22日 13:04:15 +0530
Delivery-date:	2008年10月22日 00:35:30 -0700
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I want to share a page between Dom0 and DomU, As per my understanding steps
should be as follows:-\
1)DomU get a page
2)DomU created a grant access reference and transmit the reference id to
Dom0
3)Dom0 maps the page and do the memory acces
4)Dom0 unmap the page
In Dom0 we can map the page through following:-
uint32_t domid = ...;
uint32_t ref = ...;
int xcg = xc_gnttab_open();
void *my_addr = xc_gnttab_map_grant_ref(xcg, dom_id, ref, PROT_READ |
PROT_WRITE);
How to grant the access to Dom0 from user space.
Regards,
Anurag Tripathi

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[Xen-devel] Sharing a page between Dom0 and DomU