A xs_handle is currently used in the xc_mem_paging_flush_ioemu_cache()
function and will be used by a subsequent patch.
Add it to struct xenpaging.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Bitmaps are used in save/restore, xenpaging and blktap2. Merge the code into a
private xc_bitops.h file. All users are single threaded, so locking is not an
issue. The array of bits is handled as volatile because the x86 save/restore
code passes the bitmap to the hypervisor which in turn modifies the bitmap.
blktap2 uses a private bitmap. There was a possible overflow in the
bitmap_size() function, the remainder was not considered.
ia64 save/restore uses a bitmap to send the number of vcpus to the host.
x86 save/restore uses a bitmap to track dirty pages. This bitmap is shared with
the hypervisor. An unused function count_bits() was removed and a new
bitmap_size() function is now used.
xenpaging uses 3 private bitmaps to track the gfns which are in paged-out
state. It had a copy of some Linux bitops.h, which is now obsolete. Also the
BITS_PER_LONG macro was hardcoded to 64 which made it impossible to run 32bit
tools on a 64bit host. Wether this works at all has to be tested, yet.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
The generated strings are the lower case enum value names, with underscores.
Accepted string for parsing are the same but are case insensitive.
We provide a table of strings->value for each Enumeration as well as a
convenience function to perform a lookup.
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
/etc/init.d/xendomains relies on simple pattern matching from sructures
being printed by "xl list -l" command. so update xl implementation to
match.
Signed-off-by: Carsten Schiers <carsten@schiers.de>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
OCaml libraries will live in /usr/local/ if the user compiles OCaml
from source. This patch asks the OCaml compiler where we should look
for libraries.
NB: it may be that we should do the same thing for the NetBSD case,
but I don't have a BSD box to test this out.
Signed-off-by: Mike McClurg <mike.mcclurg@citrix.com>
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
When adding pci devices one by one, pciback notice only the first one. For
every next, "state" is left as is (usualy "4" in that time), so backend will
not rescan xenstore. So when VM is starting all devices should be added at once
and then backend can initialize it.
This applies only to pci, because only pci backend have one xenstore dir for
multiple devices.
Signed-off-by: Marek Marczykowski <marmarek@mimuw.edu.pl>
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
Currently, xendomains service will save or migrate all the running domains in
the host on stop.
Change XENDOMAINS_AUTO_ONLY=true. Then on service stop, it will only
save or migrate all VMs under XENDOMAINS_AUTO (/etc/xen/auto), but always
shutdown all the running VMs.
It's a way to cleanly shutdown all the running VMs on system reboot. If you
want to save/migrate a VM, create a link to /etc/xen/auto.
Signed-off-by: Zhigang Wang <zhigang.x.wang@oracle.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
The spinlock code in the pager is a no-op because xenpaging is a single
threaded application. There is no locking when put_response() places a
response into the ringbuffer.
The only locking is inside the hypervisor, where mem_event_put_request() and
mem_event_get_response() lock the ringbuffer to protect multiple vcpus from
each other.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
move xc_* access out of dump_ctx.
Update code paths to return an error instead of calling exit().
On error unpause the guest if it was paused by xenctx.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
Move all globals used for options and libxc data into a new struct xenctx.
This is used in subsequent changes.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
Adds tool support to debug backends which expose I/O ring state in
sysfs. Currently supports /sys/devices/xen-backend/vbd-*-*/io_ring
nodes for block I/O, where implemented.
Primary function is to observe ring state make progress over a period
of time, then report stuck message queue halves where pending
consumer/event are not moving.
Adding --kick will re-issue event notifications to frontends, and/or
kick backends out of wait state.
Signed-off-by: Daniel Stodden <daniel.stodden@citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
Some old linux kernels such as 2.6.18 don't define O_CLOEXEC, so
remove O_CLOEXEC in xl_cmdimpl.c and replace with fcntl.
Signed-off-by: Yongjie Ren <yongjie.ren@intel.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
PAE guests have 8-byte PTEs but tend to clear memory with 4-byte writes.
This means that when zeroing a former pagetable every second 4-byte
write is unaligned and so the consecutive-zeroes --> unshadow
heuristic never kicks in. Adjust the heuristic not to reset when
a write is >= 4 bytes and writing zero but not PTE-aligned.
Signed-off-by: Tim Deegan <Tim.Deegan@citrix.com>
Where this is safe, it can reduce latency and cpu overhead compared
with scheduling the idle vcpu to perform the same tasklet work.
Signed-off-by: Keir Fraser <keir@xen.org>
This patch fixes PV on HVM interrupt remapping with recent Linux
kernels and upstream qemu. hvm_domain_use_pirq should return positive
even if the evtchn is not currently bound. If it doesn't assert_irq
ends up injecting legacy interrupts even after the guest disabled the
irq.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
The AMD and INTEL specific parts of cpufreq handling used different
per-cpu data structures with nearly identical semantics. Fold the two
structures into one by adding a generic architecture data item.
Signed-off-by: Juergen Gross <juergen.gross@ts.fujitsu.com>
As of 2.6.33, Linux checks that the thermal monitor LVT isn't set to
SMI delivery mode on just the value read on the boot CPU. As of 2.6.39
it additionally avoids writing back the saved value when its delivery
mode is FIXED (as this can cause APIC errors).
Changes done here that aren't in Linux are
- write back the boot CPU value also if delivery mode is FIXED, but
there is also a valid vector
- print the messages when bailing out only once (on the boot CPU)
- when doing the final (enabling) write to the LVT, don't re-read the
old value from the APIC, as we have it in a local variable already
Signed-off-by: Jan Beulich <jbeulich@novell.com>
When memory map sparseness reduction is in use, machine address ranges
can't validly be compared directly against the total size of the
direct mapping range.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Introduce the boolean variable 'kexecing' which indicates to functions
whether we are on the kexec path or not. This is used by
disable_local_APIC() to try and revert the APIC mode back to how it
was found on boot.
We also need some fudging of the x2apic_enabled variable. It is used
in multiple places over the codebase to mean multiple things,
including:
What did the user specifify on the command line?
Did the BIOS boot me in x2apic mode?
Is the BSP Local APIC in x2apic mode?
What mode is my Local APIC in?
Therefore, set it up to prevent a protection fault when disabling the
IOAPICs. (In this case, it is used in the "What mode is my Local APIC
in?" case, so the processor doesnt suffer a protection fault because
of trying to use x2apic MSRs when it should be using xapic MMIO)
Finally, make sure that interrupts are disabled when jumping into the
purgatory code. It would be bad to service interrupts in the Xen
context when the next kernel is booting.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
The kdump kernel has problems booting with interrupt/dma
remapping enabled, so we need a new iommu_ops called
crash_shutdown which is basically suspend but doesn't
need to bother saving state.
Make sure that crash_shutdown is called on the kexec
path.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Remapping
Experimental evidence shows that Extended Interrupt Mode remains in
effect even after Interrupt Remapping is disabled in each DMAR Global
Command Register. A consiquence of this is that when we switch from
x2apic mode back to xapic mode, and disable interrupt remapping for
the kdump kernel, interrupts passing through the IO APICs are in
x2apic format as opposed xapic. This causes a triple fault in the
kexec kernel.
As EIM is explicitly set up each time Interrup Remapping is enabled,
it is safe for us to clobber this when taring down.
Also, change the header definition of IRTA_REG_EIME_SHIFT. It caused
verbose and error-prone code, and was only used in 1 place before. We
now have IRTA_EIME which is the specific bit in the register.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Write/read FS/GS base instructions enable user level code to
read/write FS & GS segment base registers for thread local storage.
Signed-off-by: Yang, Wei <wei.y.yang@intel.com>
Under certain conditions, if an IO gets into an unexpected state,
hvmemul_do_io can return X86EMUL_UNHANDLEABLE. Unfortunately,
handle_pio() does not expect this state, and calls BUG() if it sees
it, crashing the host.
Other HVM io-related code crashes the guest in this case. This patch
makes handle_pio() do the same.
The crash was seen when executing crash_guest in dom0 to forcibly
crash the guest.
Signed-off-by: George Dunlap <george.dunlap@eu.citrix.com>
Olaf Hering
Ian Jackson
Ian Campbell
Carsten Schiers
Mike McClurg
Marek Marczykowski
Zhigang Wang
Stefano Stabellini
Philipp Hahn
Daniel Stodden
Yongjie Ren
Tim Deegan
Keir Fraser
Juergen Gross
Andrew Cooper
Jan Beulich
Yang, Wei
George Dunlap
Eddie Dong