Displaying 20 results from an estimated 248 matches for "deegan".
2011 Jun 27
20
[PATCH 0 of 5] v2: Nested-p2m cleanups and locking changes
This patch series tidies up a few bits ofthe nested p2m code.
The main thing it does is reorganize the locking so that most of the
changes to nested p2m tables happen only under the p2m lock, and the
nestedp2m lock is only needed to reassign p2m tables to new cr3 values.
Changes since v1:
- a few minor fixes
- more sensible flushing policy in p2m_get_nestedp2m()
- smoke-tested this time!
2013 Sep 12
23
More Coverity-reported issues.
Another bundle of issues from Coverity triage.
The first one is in x86/mm, and looks scarier than it is. The others
are all in xen/drivers and AFAICT are pretty minor.
Cheers,
Tim.
2006 May 24
3
[PATCH 1/1] mboot.c32: fix register constraints bug
From: Tim Deegan <Tim.Deegan at cl.cam.ac.uk>
Fix register constraints of final jump to kernel entry.
When compiled with some GCC versions, mboot.c32 would clobber the kernel
load address and try to jump to 0x2badb002.
Signed-off-by: Tim Deegan <Tim.Deegan at cl.cam.ac.uk>
---
--- syslinux-3.20-pre...
2012 Apr 05
3
[PATCH] tools/blktap2: fix 'make clean'
# HG changeset patch
# User Tim Deegan <tim@xen.org>
# Date 1333621466 -3600
# Node ID 4b6bf18b6790e3713ddc4fdc1d63e54b4635c57b
# Parent d690c7e896a26c54a5ab85458824059de72d5cba
tools/blktap2: fix ''make clean''
Signed-off-by: Tim Deegan <tim@xen.org>
diff -r d690c7e896a2 -r 4b6bf18b6790 tools/blktap2/lvm/...
2008 Sep 03
1
[PATCH] Fix guest_handle_okay/guest_handle_subrange_okay
The guest handle checks should use paging_* predicates, not shadow_*.
Also tidy up a few places where p2m definitions were being imported
via asm/guest_access.h -> asm/shadow.h -> asm/p2m.h
Signed-off-by: Tim Deegan <Tim.Deegan@citrix.com>
--
Tim Deegan <Tim.Deegan@citrix.com>
Principal Software Engineer, Citrix Systems (R&D) Ltd.
[Company #02300071, SL9 0DZ, UK.]
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2009 Aug 26
6
can dom0 modify Shadow PT of HVM domU?
Hi all,
Can Xen hypervisor modify HVM domU's Shadow page table, under the dom0's context, like trapped from dom0's hypercall?
I think it have to call 2 functions at least: guest_walk_tables() and flush_tlb_all(). Can these 2 functions called in dom0's context?
In my test, if hypervisor tries to modify HVM's shadow page table, it will bring down the whole system. I am not
2011 Jul 30
22
[bug] ''VT-d 1G super page'' feature is blocked
Hi Tim,
Could you please have a look at this bug? Thanks a lot.
http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1774
Best Regards,
Yongjie Ren (Jay)
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2011 Feb 18
2
Re: Xen-devel Digest, Vol 71, Issue 85
Hi all!
Did the nested xen stuff make it into the xen-unstable (4.1-rc1?) tree as
suggested back in January by Tim Deegan?
TIA
________________________________
Date: Fri, 7 Jan 2011 16:01:12 +0000
From: Tim Deegan <Tim.Deegan@citrix.com>
Subject: Re: [Xen-devel] [PATCH 00/12] Nested Virtualization: Overview
To: Christoph Egger <Christoph.Egger@amd.com>
Cc: Keir Fraser <keir@xen.org>, "xe...
2009 Oct 23
11
soft lockups during live migrate..
Trying to migrate a 64bit PV guest with 64GB running medium to heavy load
on xen 3.4.0, it is showing lot of soft lockups. The softlockups are
causing dom0 reboot by the cluster FS. The hardware has 256GB and 32
CPUs.
Looking into the hypervisor thru kdb, I see one cpu in sh_resync_all()
while all other 31 appear spinning on the shadow_lock. I vaguely remember
seeing some thread on this while
2013 Oct 21
5
I/O port access handling for PVH
George,
since you asked on Friday, I though about the situation some more
over the weekend.
On PV, the requirement to trap all INs and OUTs is a result from us
needing the enforce two levels of restrictions - Xen''s and the guest
kernel''s. I.e. we can''t make use of the hardware''s access control
mechanisms, as we can''t put two I/O bit maps in place, and
2007 Jun 28
5
One question on MMIO
In sh_page_fault(), there are some code like following, why we think it
is mmio only when paging_vcpu_mode_translate(v)?
Thanks
Yunhong Jiang
/* What mfn is the guest trying to access? */
gfn = guest_l1e_get_gfn(gw.eff_l1e);
gmfn = vcpu_gfn_to_mfn(v, gfn);
mmio = (is_hvm_domain(d)
&& paging_vcpu_mode_translate(v)
&&
2011 Mar 15
6
[PATCH] ept: Fix bug in changeset 22526:7a5ee3800417
This fixes a bug in changeset 22526:7a5ee3800417, where the wrong
value is read when deciding whether to flush the VTd tables. The
effect is minor: in situations where the p2m entry is changed but the
mfn is the same, the VTd tables will be unnecessarily flushed.
old_entry is left untouched in the second case, since having a present
old_entry will cause the an unnecessary check to be taken at
2008 Dec 02
8
[Question] How to support page offline in Xen environment
Hi, all
Page offline can be used by many purpose, like memory offline, memory power management, proactive action when multiple CE error happen to one page etc. In virtualization environment without guest offline support, we think offline a page usually means replace the old page with a new one transparently to guest.
Currently we are trying to add page offline support in Xen environment .
2010 Oct 15
6
[PATCH 01/13] Nested Virtualization: tools
--
---to satisfy European Law for business letters:
Advanced Micro Devices GmbH
Einsteinring 24, 85609 Dornach b. Muenchen
Geschaeftsfuehrer: Alberto Bozzo, Andrew Bowd
Sitz: Dornach, Gemeinde Aschheim, Landkreis Muenchen
Registergericht Muenchen, HRB Nr. 43632
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2005 Apr 28
3
PXE-booting Xen using PXELINUX
...'re using and symptoms if it fails would be even
better.
At some point in the next while I''ll be submitting this code to the main
SYSLINUX tree, with proper documentation and such-like bells and
whistles. In the meantime, feedback would be much appreciated.
Cheers,
Tim.
--
Tim Deegan (My opinions, not the University''s)
Systems Research Group
University of Cambridge Computer Laboratory
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2007 Dec 05
13
[PATCH] unshadow the page table page which are used as data page
The patch deals with the situation which guest OS uses unused page table
pages as data pages and write data to them. The pages will still be
grabbed by Xen as page table pages, and lots of unnecessary page faults
occur.
The patch will check if the data guest writes to the page table contains
valid mfn or not, if not, we believe it is a data page now and then
unshadow the page.
The patch
2011 Feb 21
5
How to create shadow page table of my own?
Hi, guys
Recently I have been doing some research & I''ve got in trouble.
I have altered the kernel of domU and put the code section and data section of selinux security server which locate ~/security/selinux/ss into two seperate sections in the final vmlinux image(see below)
objdump -h vmlinux
vmlinux: file format elf32-i386
Sections:
Idx Name Size VMA
2012 Aug 03
0
[xen-unstable test] 13540: regressions - FAIL
...983ea7521bad
baseline version:
xen 3d17148e465c
------------------------------------------------------------
People who touched revisions under test:
Christoph Egger <Christoph.Egger@amd.com>
Jan Beulich <jbeulich@suse.com>
Keir Fraser <keir@xen.org>
Tim Deegan <tim@xen.org>
------------------------------------------------------------
jobs:
build-amd64 pass
build-i386 fail
build-amd64-oldkern pass...
2008 Dec 11
4
paging and shadow paging in xen: trying to implement split memory
Hi all,
I''ve been reading through the code regarding paging --> spending a lot of
time in mm/*.*, as well as some of the other parts up a level or two, but
I''m still unclear as to some key things.
Here''s what I think I know:
I think I know how a domain''s shadow page table is first allocated E.G. the
hash_table is xmalloc''ed and when it is
2007 Aug 07
3
Why p2m allocation is from hap or shadow preallocated memory?
And can we make p2m memory allocation from domain heap directly?
-Xin
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