All of lore.kernel.org
 help / color / mirror / Atom feed
From: Kaustubh Kabra <kaustubhwise@gmail.com>
To: xen-devel@lists.xensource.com
Cc: vasani.ashwin@gmail.com,
	Dan Magenheimer <dan.magenheimer@oracle.com>,
	keir@xen.org, Tim.Deegan@citrix.com
Subject: Doubt regarding virtual memory mapping from hypervisor to a domain
Date: Sat, 29 Jan 2011 00:53:29 +0530	[thread overview]
Message-ID: <AANLkTim1TzbX7mEXGYr3kBdY+E-4Y-8eNAYjnT3dWeYe@mail.gmail.com> (raw)

Hi,
I have allocated few order=9 pages in Xen memory space using
alloc_domheap_pages(NULL,9,0) during boot time just before domain is
created (dom0 = domain_create(0, DOMCRF_s3_integrity, DOM0_SSIDREF) in
xen/arch/x86/setup.c).

I got the following virtual addresses in xen log message-
(XEN) a2k2: Virt_addr:ffff83011cc00000   MFN:11cc00
(XEN) a2k2: Virt_addr:ffff83011ca00000   MFN:11ca00
(XEN) a2k2: Virt_addr:ffff83011c800000   MFN:11c800
(XEN) a2k2: Virt_addr:ffff83011c600000   MFN:11c600
(XEN) a2k2: Virt_addr:ffff83011c400000   MFN:11c400
(XEN) a2k2: Virt_addr:ffff83011c200000   MFN:11c200
(XEN) a2k2: Virt_addr:ffff83011c000000   MFN:11c000
(XEN) a2k2: Virt_addr:ffff83011be00000   MFN:11be00

As per config.h file Xen memory map,the virtual mapping shows that the
memory is  allocated in
1:1 direct mapping of all physical memory .Can anyone elaborate
regarding this mapping ?

Now can I allocate this mapped memory reserved by Xen hypervisor to
any domain through any existing or my new hypercall?

--
Regards,
Kaustubh Kabra
Pune Institute Of Computer  Technology,
University of Pune,
India.

             reply	other threads:[~2011-01-28 19:23 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-01-28 19:23 Kaustubh Kabra [this message]
2011-01-31 15:36 ` Doubt regarding virtual memory mapping from hypervisor to a domain Dan Magenheimer
2011-02-10 13:26   ` Kaustubh Kabra
2011-02-10 15:13     ` Konrad Rzeszutek Wilk

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=AANLkTim1TzbX7mEXGYr3kBdY+E-4Y-8eNAYjnT3dWeYe@mail.gmail.com \
    --to=kaustubhwise@gmail.com \
    --cc=Tim.Deegan@citrix.com \
    --cc=dan.magenheimer@oracle.com \
    --cc=keir@xen.org \
    --cc=vasani.ashwin@gmail.com \
    --cc=xen-devel@lists.xensource.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.