xc_domain_save/restore currently pay no attention to
HVM_PARAM_VIRIDIAN which results in an HVM domain running a recent
version on Windows (post-Vista) locking up on a domain restore due to
EOIs (done via a viridian MSR write) being silently dropped. This
patch adds an extra save entry for the viridian parameter and also
adds code in the viridian kernel module to catch attempted use of
viridian functionality when the HVM parameter has not been set.
Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Committed-by: Keir Fraser <keir@xen.org>
Without this change it is not possible to page-out all guest pages, then
trigger a page-in for all pages, and then page-out everything once
again. All pages in the mru list can not be paged out because they
remain active in the internal bitmap of paged pages.
Use the mru list only if the number of paged-out pages is larger than
the mru list. If the number is smaller, start to clear the mru list. In
case the number of paged-out pages drops to zero the mru list and the
internal bitmap will be empty as well.
Also add a new interface for dropped pages. If a gfn was dropped there
is no need to adjust the mru list because dropping a page is not usage
of a page.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
Introduce a cmdline handling for the pager. This simplifies libxl support,
debug and mru_size are not passed via the environment anymore.
The new interface looks like this:
xenpaging [options] -f <pagefile> -d <domain_id>
options:
-d <domid> --domain=<domid> numerical domain_id of guest. This option is required.
-f <file> --pagefile=<file> pagefile to use. This option is required.
-m <max_memkb> --max_memkb=<max_memkb> maximum amount of memory to handle.
-r <num> --mru_size=<num> number of paged-in pages to keep in memory.
-d --debug enable debug output.
-h --help this output.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
Subsequent patches will use xenstored to store the numbers of pages
xenpaging is suppose to page-out.
Remove num_pages and use target_pages instead.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
This change reverses the task of xenpaging. Before this change a fixed number
of pages was paged out. With this change the guest will not have access to
more than the given number of pages at the same time.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
In preparation of upcoming libxl integration,
move xenpaging binary from /usr/sbin/ to /usr/lib/xen/bin/
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
Nomination of gfns can fail, but may succeed later.
Thats the case for a guest that starts ballooned.
v2:
- print debug when clearing uncosumed happens
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
Remove the if/else logic to exit from the in case a signal arrives.
Update comments.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
Move page resume loop into its own function.
Move page eviction loop into its own function.
Allocate all possible slots in a paging file to allow growing and
shrinking of the number of paged-out pages. Adjust other places to
iterate over all slots.
This change is required by subsequent patches.
v2:
- check if victims allocation succeeded
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
Remove xc_dominfo_t from paging_t, record only max_pages.
This value is used to setup internal data structures.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
Move comment about xc_handle to the right place.
Allocate paging early and use calloc.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
Catch lseek() errors.
Use -1 as return value and let caller read errno.
Remove const casts from buffer pointers, the page is writeable.
Use wrapper for write() which matches the read() prototype.
Remove unused stdarg.h inclusion.
Remove unused macro.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
v3:
- adjust arguments for xc_mem_paging_enable() failures
v2:
- move changes to file_op() to different patch
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
Remove stale comment.
If a page was populated several times the vcpu is paused and
xenpaging has to unpause it again.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
In libvchan_client_init, go to the error path if the gntdev device is
not available. Otherwise, a segfault happens later as the vchan
context is invalid.
Signed-off-by: Anil Madhavapeddy <anil@recoil.org>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
The Intel GPU uses a two pages NVS region called OpRegion.
In order to get full support for the driver in the guest
we need to map this region.
This patch reserves 2 pages on the top of the memory in the
reserved area and mark this region as NVS in the e820. Then
we write the address to the config space (offset 0xfc) so the
device model can map the OpRegion at this address in the guest.
Signed-off-by: Jean Guyader <jean.guyader@eu.citrix.com>
Committed-by: Keir Fraser <keir@xen.org>
To acknowledge the tools' setting of control/shutdown it is normal for
PV drivers to rm the key. This leads to libxl__xs_read() returning
NULL and thus a subsequent strcmp on the return value will cause a
segfault.
Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
24184:4ecd3615e726 missed this because I was accidentally testing with a
.config containing CONFIG_SYSTEM_LIBAIO=n. Tools tree now fully rebuilt
without this. There were no other issues.
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
I could have sworn I did this years ago.
IIRC the need for our own copy was due to the use of io_set_eventfd which is
not present in version 0.3.106. However it is in 0.3.107 the first version of
which was uploaded to Debian in June 2008 (I can't find a better reference for
the release date).
The necessary version is available in Debian Lenny onwards and is in at least
RHEL 6, Fedora 13 and OpenSuSE 11.3. The necessary version appears to not be
available in RHEL 5 or SLES 11 which is why I haven't simply nuked the in tree
version.
This is based on tools-system-libaio.diff from the Debian packaging although I
have made it optional (but default on).
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
In order to read keys from xenstore, the xenstore libraries need to
write the request to the xenbus socket. This means that the socket
cannot be opened read-only.
Signed-off-by: Daniel De Graaf <dgdegra@tycho.nsa.gov>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
Linux PV on HVM guests can use vkbd, so add a vkbd frontend/backend
pair for HVM guests by default. It is useful because it doesn't
require frequent qemu wakeups as the usb keyboard/mouse does.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
Change the way we relocate the memory page if they overlap with pci
hole. Use new map space (XENMAPSPACE_gmfn_range) to move the loop
into xen.
This code usually get triggered when a device is pass through to a
guest and the PCI hole has to be extended to have enough room to map
the device BARs. The PCI hole will starts lower and it might overlap
with some RAM that has been alocated for the guest. That usually
happen if the guest has more than 4G of RAM. We have to relocate
those pages in high mem otherwise they won't be accessible.
Signed-off-by: Jean Guyader <jean.guyader@eu.citrix.com>
Committed-by: Keir Fraser <keir@xen.org>
Introduce acpi_s3 and acpi_s4 configuration options (default=1). The
S3 and S4 packages are moved into separate SSDTs and their inclusion
is controlled by the new configuration options.
Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Committed-by: Keir Fraser <keir@xen.org>
Since hvmloader has a xentore client, use a platform key in xenstore
to indicate whether ACPI is enabled or not rather than the shared
hvm_info_table structure.
Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Committed-by: Keir Fraser <keir@xen.org>
The layouts were actually correct, but the type names were a bit
messed up.
Original patch by Volker Eckert <volker.eckert@citrix.com>
Signed-off-by: Keir Fraser <keir@xen.org>
Incorrect register usage in the _start() wrapper caused the 64-bit
execution emulation to fail.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Committed-by: Keir Fraser <keir@xen.org>
This avoids a conflict with SeaBIOS's memory management. Moreover
there is no reason that acp_info must live below 1MB, and moving it
out actually simplifies our code.
Signed-off-by: Keir Fraser <keir@xen.org>
Parse EXTRA_INCLUDES, EXTRA_LIB, PREPEND_INCLUDES, PREPEND_LIB,
APPEND_INCLUDES, APPEND_LIB during checks, to search for required
files.
Signed-off-by: Roger Pau Monne <roger.pau@entel.upc.edu>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
Create two new variables called APPEND_ and PREPEND_ to add compile
flags at the beginning or at the end of the search path.
Added a new semantic for user defined compile flags, here is the list
of possible options:
PREPEND_LIB: add libraries to the search path before xen
(before xen installation folders).
PREPEND_INCLUDES: add headers to the search path before xen
(before xen installation folders).
APPEND_LIB: add libraries to the search path at the end
(after all xen installation folders have been added).
APPEND_INCLUDES: add libraries to the search path at the end
(after all xen installation folders have been added).
EXTRA_INCLUDES and EXTRA_LIB can still be used, and they will have the
same effect as PREPEND_INCLUDES and PREPEND_LIB.
Signed-off-by: Roger Pau Monne <roger.pau@entel.upc.edu>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
Bugzilla 1680: Xend fails to start if /var/lib/xend/state/*.xml are empty
which I get often when replacing the Xen hypervisor with a newer version.
This can be easily be reproduced under Fedora Core 16 by installing
xen RPMs and then replacing the xen.gz with a newer version.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Anthony Low <shinji@pikopiko.org>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
Do munmap() on all mapped pages, not just the first one. Without this
change the gfns backing the remaining pages can not be paged out again
because the page count does not go down to 1. This change was missing
from changeset 23827:d1d6abc1db20.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
Xen try to inforce the xsm policy when a HVMOP_track_dirty_vram
is received (xen/arch/x86/hvm/hvm.c:3637). It was failing because
in flask_hvmcontext, xsm didn't have any case for this operation.
Signed-off-by: Jean Guyader <jean.guyader@eu.citrix.com>
Committed-by: Keir Fraser <keir@xen.org>
Also move the xenstore specific code to a new function and add a
message if sscanf fails.
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
Ian Jackson
Paul Durrant
Olaf Hering
Anil Madhavapeddy
Ian Campbell
Jean Guyader
Daniel De Graaf
Stefano Stabellini
Keir Fraser
Jan Beulich
Roger Pau Monne
Konrad Rzeszutek Wilk
Anthony PERARD