state of the real TS bit. This fixes a number of subtle FP
corruption issues within PV domains when running alongside VMX ones.
Signed-off-by: Steven Hand <steven@xensource.com>
instead of cloning it. This enables developers to keep a linux tree
separate to their xen repository and to make changes there which are
picked up by the Xen build.
Signed-off-by: Ian Campbell <ian.campbell@xensource.com>
Syslinux can load 32-bit UI code for menu handling. But the core of
syslinux is still 16-bit. When it jumps to this 32-bit code, it
installs a set of 32-bit interrupt trap handlers which just bounce the
interrupts back to 16-bit mode.
But this plays badly with vmxassist. When running 16-bit boot loader
code, vmxassist installs its own trap handlers which bounce vPIC
interrupts back down to 16-bit mode. The trap handlers live at
int 0x20 to 0x2f, so when the 16-bit code tries to reprogram the vPIC,
vm86 rewrites the outb()s on the fly to set the irq_base vectors
accordingly.
So when syslinux enters 32-bit mode, the vPIC has still been
programmed to point to vmxassist's bounce traps, even though vmxassist
is no longer active once the guest is running 32-bit code. So the
wrong interrupts get delivered to the guest.
Fix this by restoring the rombios vPIC irq_base vectors when we leave
vmxassist mode, and returning the vmxassist traps when we reenter it.
These irq base values are hard-coded in this patch, but they are
already hard-coded in vmxassist so any boot code that relies on
changing them will already fail.
Signed-off-by: Stephen Tweedie <sct@redhat.com>
Change the logfile name generated by qemu-dm to use the pattern
qemu-dm-[NAME].log instead of qemu-dm-[PID].log. This makes it
easier for the adminsitrator to figure out which log corresponds to
which guest (particularly after a crash where you no long know what
PID the qemu-dm process for your guest had). It also prevents the
number of log files from growing unbounded.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
* The --log command line argument takes one of 4 values
- none - no logging (the default)
- hv - log all hypervisor messages
- guest - log all guest messages
- both - log all guest & hypervisor messages
* The --log-dir command line argument takes a path to specify where
to store logfiles. If omitted it defaults to /var/log/xen/console
* The hypervisor logfile is $LOGDIR/hypervisor.log
* The guest logfile is $LOGDIR/guest-[NAME].log
* If receiving a SIGHUP it will close & re-open all log files to
enable logrotate to do its magic
* Fixes the permissions of /var/run/xenconsoled.pid
* Adds a --pid-file command line argument to override the default
location of pid file (this is not really related to logging, but
since I was in that code...)
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The only non-obvious change here is in tools/xenfb/Makefile. This now picks up
the headers it requires via the copy in tools/libxc.
Signed-off-by: Ian Campbell <ian.campbell@xensource.com>
The sparse tree is now deprecated and will deleted in due course. The
xen-unstable build system will automatically clone the correct Linux
tree for you and all the old makefile targets
(dist/linux-2.6-xen{,0,U}/etc) should continue to work.
Signed-off-by: Ian Campbell <ian.campbell@xensource.com>
By default search for mercurial repositories in $(LINUX_SRC_PATH)
followed by a location derived from the current Xen repository's
default parent. e.g. A clone of
http://xenbits.xensource.com/xen-unstable.hg will derive
http://xenbits.xensource.com/linux-2.6.18-xen.hg. A specific
repository can be specified by giving XEN_LINUX_HGREPO=<URL or path>
on the make command line.
Add capability to put XEN_LINUX_UPDATE=y on the make command line to
update the Linux repository. Disabled by default since we don't want
to touch a developers repository without permission.
Dropped XEN_LINUX_HGUPDATES since it was unecessary and confusing.
Signed-off-by: Ian Campbell <ian.campbell@xensource.com>
Our @us.ibm.com emails cannot forward to us; we do not have access to
them when not interning at IBM. People have attempted to reach us via
those addresses and failed; occasionally they've Googled for a current
address, which made us realize the problem. Change each email to a
more permanent address, so people can reach us in the future. Change
bug reporting addresses to a xen mailing list rather than an
individual.
Signed-off-by: Josh Triplett <josh@kernel.org>
c/s 15021 updated Qemu to 0.90. In the new Qemu's ide.c, asynchronous
IO (AIO) is used to replace the previous DMA thread; here when an AIO
request is completed, dom0 sends a signal SIGUSR2 to Qemu (see
block-raw.c: qemu_aio_init(),raw_aio_setup()), then the signal
interrupts the select() in main_loop_wait() at once, next,
qemu_aio_poll() is called to reap a completed AIO request.
However, in certain Linux distributions (i.e., x86_64 RHEL 4u4), if
Qemu is spawned by the python script image.py of Control Panel, the
SIGUSR2 of Qemu is blocked by default due to some reasons (i.e. it
seems Python 2.3.4 has this issue; 2.4.2 is ok); so in most cases the
select() in main_loop_wait() can only time out in 10ms, then the
qemu_aio_poll() is called - this results in a very slow disk IO
speed...
This patch ensures aio_sig_num is unblocked when the AIO is used in
Qemu 0.90.
Signed-off-by: Dexuan Cui <dexuan.cui@intel.com>
xen/include/public/foreign.
Unfortunately diff's -x and -X options do not support excluding paths just
individual files so we have to list unqualified filenames. This is ok for now
since there are no filename clashes.
Signed-off-by: Ian Campbell <ian.campbell@xensource.com>
Some operating systems access the local APIC TPR very frequently, and
we handle that using software-based local APIC virtualization in Xen
today. Such virtualization incurs a number of VM exits from the
memory-access instructions against the APIC page in the guest.
The attached patch enables the TPR shadow feature that provides APIC
TPR virtualization in hardware. Our tests indicate it can
significantly boost the performance of such guests including 32-bit
Windows XP/2003.
Moreover, with the patch, local APIC accesses other than TPR in guests
are intercepted directly as APIC_ACCESS VM exits rather than
PAGE_FAULT VM exits; this can lower the emulation cost of such
accesses.
Signed-off-by: Dexuan Cui <dexuan.cui@intel.com>
This is only enabled for the linux-2.6-xen tree and is intended to
ensure that the separate Linux tree stays up to date once we
switch away from the sparse tree.
Signed-off-by: Ian Campbell <ian.campbell@xensource.com>
mcs->call (struct multicall_entry) always needs to be translated into
mcs->compat_call (struct compat_multicall_entry) when a multicall is
preempted in compat mode. Previously this translation only occured for
those hypercalls which explicitly called hypercall_xlat_continuation()
which doesn't cover all hypercalls which could potentially be
preempted.
Change hypercall_xlat_continuation() to only translate only the
hypercall arguments themselves and not the multicall_entry
layout. Translate the layout for all hypercalls in in
compat_multicall() instead.
Signed-off-by: Ian Campbell <ian.campbell@xensource.com>
This patch adds lazy copying using the new unmap_and_replace grant
table operation.
We keep a list of pending entries sorted by arrival order. We'll
process this list every time net_tx_action is invoked. We ensure
that net_tx_action is invoked within one second of the arrival of
the first packet in the list.
When we process the list any entry that has been around for more
than half a second is copied. This allows up to free the grant
table entry and return it to domU.
If the new grant table operation is not available (e.g., old HV
or architectures that don't support it yet) we simply copy each
packet as we receive them using skb_linearize. We also disable
SG/TSO if this is the case.
By default the new code is disabled. In order to enable it,
the module needs to be loaded with the argument copy_skb=1.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This patch adds basic tracking of outstanding DMA requests on
grant table entries marked as PageForeign.
When a PageForeign struct page is about to be mapped for DMA,
we set its map count to 1 (or zero in actual value). This is
then checked for when we need to free a grant table entry early
to ensure that we don't free an entry that's currently used for
DMA.
So any entry that has been marked for DMA will not be freed early.
If the unmapping API had a struct page (which exists for the sg
case) then we could do this properly.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The operation unmap_and_replace is an extension of unmap_grant_ref.
A new argument in the form of a virtual address (for PV) is given.
Instead of modifying the PTE for the mapped grant table entry to
null, we change it to the PTE for the new address. In turn we
point the new address to null.
As it stands grant table entries once mapped cannot be
remapped by the guest OS (it can however perform a new
mapping on the same entry but that is within our control).
Therefore it's safe to manipulate the mapped PTE entry to
redirect it to a normal page where we've copied the contents.
It's intended to be used as follows:
1) map_grant_ref to v1
2) ...
3) alloc page at v2
4) copy the page at v1 to v2
5) unmap_and_replace v1 with v2
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Added compat integration (PAE-on-64).
Signed-off-by: Keir Fraser <keir@xensource.com>
Do not destroy domains on shutdown timeout: the administrator needs to
be able to decide what to do if a domain does not shut down.
Signed-off-by: John Levon <john.levon@sun.com>
xenstored is incorrectly accounting domain nodes when transactions
fail. Store pending count changes in the transaction structure, and
apply at transaction completion, instead of directly applying the
changes.
Signed-off-by: Max Zhen <max.zhen@sun.com>
were copying too many bytes from the guest so the test for
area.addr.h.c != area.addr.p was failing.
Added a WARN_ON to the kernel to catch this case. It would be a BUG_ON
but this would break the new kernel on older hypervisors and the only
real problem is that stolen time is not updated, which we can live
with.
Signed-off-by: Ian Campbell <ian.campbell@xensource.com>
abusing mk_kernel_pgd.
Also set the user bit on the vsyscall entry in the user pgd.
Both changes suggested by Jan Beulich.
Signed-off-by: Ian Campbell <ian.campbell@xensource.com>
tarball methods in preparation for migrating away from the sparse tree
layout.
This re-introduces 14883:6568c1882af5 and 14862:98efd2e410ae plus
further fixes.
Also add makefile fragments to support building the paravirt ops tree
(make linux-2.6-paravirt-build).
Signed-off-by: Ian Campbell <ian.campbell@xensource.com>
