Jan Beulich [Fri, 1 Jul 2011 19:41:43 +0000 (20:41 +0100)]
x86/EFI: fix interrupt and fault handling during runtime services calls
The missing piece was the setting up of an accessible GDT prior to
switching page tables (and reverting to the original setting after
having established the normal page tables again afterwards).
George Dunlap [Fri, 1 Jul 2011 19:31:18 +0000 (20:31 +0100)]
xentrace: Allow tracing to be enabled at boot
Add a "tevt_mask" parameter to the xen command-line, allowing
trace records to be gathered early in boot. They will be placed
into the trace buffers, and read when the user runs "xentrace".
Signed-off-by: George Dunlap <george.dunlap@eu.citrix.com>
George Dunlap [Fri, 1 Jul 2011 19:22:38 +0000 (20:22 +0100)]
xentrace: Make a new hardware-related trace class
Power management seems a very narrow focus for its own class, of
which we have a limited number due to the layout of the trace
records. Make a hardware-event trace class, and move power management
events into a subclass of those.
Signed-off-by: George Dunlap <george.dunlap@eu.citrix.com>
Tim Deegan [Thu, 30 Jun 2011 09:26:54 +0000 (10:26 +0100)]
x86/p2m: Add p2m_change_type_range() operation
that defers the nested-p2m flush until the entire batch has been updated.
Use it in the HAP log-dirty operations for tracking VRAM changes.
This should avoid a lot of unpleasant IPI storms as the log-dirty code
on one CPU repeatedly shoots down the nested p2m of another CPU.
Tim Deegan [Thu, 30 Jun 2011 09:26:54 +0000 (10:26 +0100)]
Nested p2m: rework locking around nested-p2m flushes and updates.
The nestedp2m_lock now only covers the mapping from nested-cr3 to
nested-p2m; the tables themselves may be updated or flushed using only
the relevant p2m lock.
This means that the nested-p2m lock is only taken on one path, and
always before any p2m locks.
Signed-off-by: Tim Deegan <Tim.Deegan@citrix.com> Acked-by: Christoph Egger <Christoph.Egger@amd.com>
Tim Deegan [Thu, 30 Jun 2011 09:26:54 +0000 (10:26 +0100)]
Nested p2m: flush only one p2m table when reallocating.
It's unhelpful to flush all of them when we only need one.
Reported-by: Christoph Egger <Christoph.Egger@amd.com> Signed-off-by: Tim Deegan <Tim.Deegan@citrix.com> Acked-by: Christoph Egger <Christoph.Egger@amd.com>
Tim Deegan [Thu, 30 Jun 2011 09:26:54 +0000 (10:26 +0100)]
Nested p2m: remove bogus check of CR3 value.
0 is a valid CR3 value; CR3_EADDR isn't but there's nothing stopping a
guest from putting it in its VMCB. The special case was broken anyway
since AFAICT "p2m->cr3" is a nester-cr3 (i.e. p2m-table) value and
guest_cr[3] is an actual-cr3 (pagetable) value.
Signed-off-by: Tim Deegan <Tim.Deegan@citrix.com> Acked-by: Christoph Egger <Christoph.Egger@amd.com>
Tim Deegan [Thu, 30 Jun 2011 09:26:54 +0000 (10:26 +0100)]
Nested p2m: implement "flush" as a first-class action
rather than using the teardown and init functions.
This makes the locking clearer and avoids an expensive scan of all
pfns that's only needed for non-nested p2ms. It also moves the
tlb flush into the proper place in the flush logic, avoiding a
possible race against other CPUs.
Signed-off-by: Tim Deegan <Tim.Deegan@citrix.com> Acked-by: Christoph Egger <Christoph.Egger@amd.com>
libxc: Squash xc_e820.h (and delete) into xenctrl.h
.. as there is no need to keep that internal header file anymore.
We export two functions xc_domain_[set|get]_memory_map which
depend on the 'struct e820entry' defined in 'xc_e820.h'.
We move the contents of the 'xc_e820.h' to the 'xenctrl.h' fixing
compiler errors when applications outside the Xen tree are trying
to compile against the libraries.
Tested-by: Daniel Castro <evil.dani@gmail.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
Roger Pau Monne [Tue, 28 Jun 2011 12:56:53 +0000 (13:56 +0100)]
xend: NetBSD portability fix for LVM raw volume names
Xen 4.1.1 was incorrectly passing /dev/rmapper/vg-lvname to pygrub
(notice the r in front of mapper), when it should pass
/dev/mapper/rvg-lvname (add the r to the last file) when using NetBSD.
I've patched it to work correctly. I'm attaching a unified diff with
the patch made against Xen 4.1.1 (it's a really simple modification).
From: Roger Pau Monne <roger.pau@entel.upc.edu> Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com> Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
Ian Jackson [Tue, 28 Jun 2011 11:19:15 +0000 (12:19 +0100)]
xl: new global -N option for dry run
This sets a global dryrun_only variable, which individual commands are
expected to honour. To avoid accidents, we introduce a new can_dryrun
member in the command table, which is initially set to 0 for each
command.
Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com> Committed-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Commit the flex output into revision control, for the benefit of those
without flex or with only very old flex. This change is split into a
separate patch for ease of review. Generated with flex 2.5.35-6 on
Debian lenny i386, by running "make" in the libxl directory. No
manual changes in this commit.
Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com> Committed-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Ian Jackson [Tue, 28 Jun 2011 11:19:11 +0000 (12:19 +0100)]
libxl: disks: new xlu_disk_parse function
Introduce new flex/regexp-based parser for disk configuration strings.
Callers will be updated in following patches.
The existing xm command line syntax for block-attach expects multiple
arguments containing different parameters for different parts of the
disk specification, so we supply a parser function which can take
multiple strings and scan them in sequence.
Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com> Committed-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Ian Jackson [Tue, 28 Jun 2011 11:19:10 +0000 (12:19 +0100)]
libxl: disks: Make LIBXL_DISK_BACKEND_UNKNOWN work
libxl callers should not be required to specify the backend if they
don't want to. So LIBXL_DISK_BACKEND_UNKNOWN should instruct libxl to
choose the backend for itself.
For now, we do this by simply treating it the same as BACKEND_TAP,
which itself falls back to other methods.
More thorough fixes for the disk handling will follow.
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com> Committed-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Jan Beulich [Tue, 28 Jun 2011 08:20:49 +0000 (09:20 +0100)]
x86-64: EFI runtime code
This allows Dom0 access to all suitable EFI runtime services. The
actual calls into EFI are done in "physical" mode, as entering virtual
mode has been determined to be incompatible with kexec (EFI's
SetVirtualAddressMap() can be called only once, and hence the
secondary kernel can't establish its mappings). ("Physical" mode here
being quoted because this is a mode with paging enabled [otherwise
64-bit mode wouldn't work] but all mappings being 1:1.)
Open issue (not preventing this from being committed imo):
Page (and perhaps other) faults occuring while calling runtime
functions in the context of a hypercall don't get handled correctly
(they don't even seem to reach do_page_fault()). I'm intending to
investigate this further.
Jan Beulich [Tue, 28 Jun 2011 08:19:35 +0000 (09:19 +0100)]
x86-64: EFI boot code
Besides introducing the relevant code paralleling parts of what is
under xen/arch/x86/boot/, this adjusts the build logic so that with a
single compilation two images (gzip-compressed ELF and EFI
application)
can get created. The EFI part of this depends on a new enough compiler
(supposedly gcc 4.4.x and above, but so far only tested to work with
4.5.x) and a properly configured linker (must support the i386pep
emulation). If either functionality is found to not be available, the
EFI part of the build will simply be skipped.
The patch adds all code to allow Xen and the (accordingly enabled)
Dom0 kernel to boot, but doesn't allow Dom0 to make use of EFI
runtime calls (this will be the subject of the next patch).
Parts of the code were lifted from an earlier never published OS
project of ours - whether respective license information needs to be
added to the respective source file is unclear to me (I was told
internally that adding a GPLv2 license header can be done if needed by
the community).
Open issues (not preventing this from being committed imo):
The trampoline allocation and initialization isn't really nice. This
is due to the trampoline needing to be placed at a fixed address, and
hence making the trampoline relocatable would seem desirable here (as
well as for BIOS-based booting, where the trampoline location needed
to be adjusted a number of time already in the past, due to it
colliding with firmware data).
By excluding mem.S, edd.S, and video.S from copied trampoline (i.e.
moving up wakeup.S? and making sure none of the symbols are used from
EFI code), the effective trampoline size could at least be reduced.
Should the mappings of [__XEN_VIRT_START, mbi.mem_upper) and
[_end, __XEN_VIRT_START+BOOTSTRAP_MAP_BASE) be destroyed, despite
non-EFI code also keeping them?
Tim Deegan [Tue, 28 Jun 2011 08:16:13 +0000 (09:16 +0100)]
x86: fix boot-time watchdog test.
Since the perf counter that the LAPIC NMI watchdog uses only
runs while the core isn't halted, and all APs are idle at
this point in the boot process, it's possible that remote
CPUs won't see any NMIs during the 10-tick waiting period.
Force all CPUs to busy-wait so we know the timers are running.
Wei Huang [Tue, 28 Jun 2011 08:13:53 +0000 (09:13 +0100)]
x86: AMD core-pair topology detection code
This patch is to support core-pair topology introduced by AMD CPUs,
which introduces a new concept of [core, compute unit]. There is a new
feature bit for topology extension in CPUID:0x80000001. Also a new
CPUID 0x8000001E is introduced for CPU topology enumeration. This
patch collects the sibling information from the new CPUID and will be
stored in the sibling map in Xen hypervisor.
James Carter [Tue, 28 Jun 2011 08:11:04 +0000 (09:11 +0100)]
xen/xsm/flask: Fix flask_tbufcontrol hook
The flask_tbufcontrol hook currently calls domain_has_xen with the
second argument being a class (SECCLASS_XEN) instead of a permission.
This patch fixes the hook so that it passes the XEN__TBUFCONTROL
permission instead.
Signed-off-by: James Carter <jwcart2@tycho.nsa.gov>
libxl: Do not SEGV when no 'removable' disk parameter in xenstore
Just assume disk as not removable when no 'removable' paremeter
Signed-off-by: Marek Marczykowski <marmarek@mimuw.edu.pl> Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com> Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
Previously PyString_FromString(NULL) was called, which caused assertion
failure.
Signed-off-by: Marek Marczykowski <marmarek@mimuw.edu.pl> Acked-by: Ian Jackson <ian.jackson@eu.citrix.com> Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com> Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
libxl: Remove frontend and backend devices from xenstore after destroy
Cleanup frontend and backend devices from xenstore for all dev types - not only
disks. Because backend cleanup moved to libxl__device_destroy,
libxl__devices_destroy is somehow simpler.
Signed-off-by: Marek Marczykowski <marmarek@mimuw.edu.pl> Acked-by: Ian Campbell <ian.campbell@citrix.com> Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
libxl: Accept disk name in libxl_devid_to_device_disk
Accept disk name in xl block-detach.
Signed-off-by: Marek Marczykowski <marmarek@mimuw.edu.pl> Acked-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com> Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
libxl: Allocate memory for strings in libxl_device_disk
Memory for strings in libxl_device_disk must be allocated from outside of
libxl__gc to not be freed at the end of function (by libxl__free_all).
Fixes xl block-detach
Signed-off-by: Marek Marczykowski <marmarek@mimuw.edu.pl> Acked-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com> Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
xl: Use macros for param parsing in network-attach
'script=' length was wrong... Replaced calls to strncmp("param", *argv,
explicit sizeof("param")) with macro and helper function to extract parameter
value. Also introduce replace_string function to simplify code.
Signed-off-by: Marek Marczykowski <marmarek@mimuw.edu.pl> Acked-by: Ian Jackson <ian.jackson@eu.citrix.com> Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
Anthony PERARD [Mon, 27 Jun 2011 16:07:35 +0000 (17:07 +0100)]
tools: Introduce XEN_RUN_DIR path.
This patch also add libxl_run_dir_path() function in libxl.
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com> Acked-by: Ian Jackson <ian.jackson@eu.citrix.com> Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
remus: handle exceptions while installing/unstalling net buffer
Signed-off-by: Shriram Rajagopalan <rshriram@cs.ubc.ca> Acked-by: Ian Jackson <ian.jackson@eu.citrix.com> Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
Jan Beulich [Thu, 23 Jun 2011 10:33:57 +0000 (11:33 +0100)]
x86: allow Dom0 image to be compressed ELF
Rather than being able to decompress only the payloads of bzImage
containers, extend the logic to also decompress simple compressed ELF
images. At once, allow uncompressed bzImage payloads.
This is a prerequisite for native EFI booting support (where, in the
absence of a capable secondary boot loader, the image will always be
in compressed form).
Jan Beulich [Thu, 23 Jun 2011 10:32:43 +0000 (11:32 +0100)]
replace d->nr_pirqs sized arrays with radix tree
With this it is questionable whether retaining struct domain's
nr_pirqs is actually necessary - the value now only serves for bounds
checking, and this boundary could easily be nr_irqs.
Note that ia64, the build of which is broken currently anyway, is only
being partially fixed up.
v2: adjustments for split setup/teardown of translation data
v3: re-sync with radix tree implementation changes
Ian Jackson [Wed, 22 Jun 2011 13:43:53 +0000 (14:43 +0100)]
libxl: remove and hgignore testenum.c
This is an output file from the test idl generator and should not have
been committed.
Reported-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com> Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
Ian Campbell [Tue, 21 Jun 2011 17:26:39 +0000 (18:26 +0100)]
libxl: autogenerate to_string and from_string functions for Enumerations.
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>
Carsten Schiers [Tue, 21 Jun 2011 17:24:34 +0000 (18:24 +0100)]
xl: improve compatibility with xm
/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>
Mike McClurg [Tue, 21 Jun 2011 17:01:51 +0000 (18:01 +0100)]
tools/ocaml: ask compiler for correct library
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>
libxl: add all pci devices to xenstore at once (during VM create)
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>
Zhigang Wang [Tue, 21 Jun 2011 16:48:00 +0000 (17:48 +0100)]
make xendomains service save/migrate vms under /etc/xen/auto only
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>
Olaf Hering [Fri, 10 Jun 2011 08:47:27 +0000 (10:47 +0200)]
xenpaging: add watch thread to catch guest shutdown
If xenpaging is started manually then no event is sent to xenpaging when
the guest is shutdown or rebooted. Add a watch on the @releaseDomain
node to leave the loop and gracefully shutdown the pager.
Signed-off-by: Olaf Hering <olaf@aepfle.de> Committed-by: Ian Jackson <ian.jackson.citrix.com>
Olaf Hering [Fri, 10 Jun 2011 08:47:24 +0000 (10:47 +0200)]
xenpaging: pass integer to xenpaging_populate_page
Pass gfn as integer to xenpaging_populate_page(). xc_map_foreign_pages()
takes a pointer to a list of gfns, but its a const pointer. So writing
the value back to the caller is not needed.
Signed-off-by: Olaf Hering <olaf@aepfle.de> Committed-by: Ian Jackson <ian.jackson.citrix.com>
Olaf Hering [Fri, 10 Jun 2011 08:47:20 +0000 (10:47 +0200)]
xenpaging: remove local domain_id variable
Remove the local domain_id variable, it is already fetched from
paging->mem_event in other places.
Update the sprintf format string to use unsigned argument.
Signed-off-by: Olaf Hering <olaf@aepfle.de> Committed-by: Ian Jackson <ian.jackson.citrix.com>
Olaf Hering [Fri, 10 Jun 2011 08:47:14 +0000 (10:47 +0200)]
xenpaging: correct dropping of pages to avoid full ring buffer
Doing a one-way channel from Xen to xenpaging is not possible with the
current ring buffer implementation. xenpaging uses the mem_event ring
buffer, which expects request/response pairs to make progress. The
previous patch, which tried to establish a one-way communication from
Xen to xenpaging, stalled the guest once the buffer was filled up with
requests. Correct page-dropping by taking the slow path and let
p2m_mem_paging_resume() consume the response from xenpaging. This makes
room for yet another request/response pair and avoids hanging guests.
Signed-off-by: Olaf Hering <olaf@aepfle.de> Committed-by: Ian Jackson <ian.jackson.citrix.com>
Olaf Hering [Fri, 10 Jun 2011 08:47:11 +0000 (10:47 +0200)]
xenpaging: drop xc.c, move xc_wait_for_event_or_timeout
Move xc_wait_for_event_or_timeout() into xenpaging and massage it a bit for
further changes in subsequent patches.
Include poll.h instead of sys/poll.h.
Signed-off-by: Olaf Hering <olaf@aepfle.de> Committed-by: Ian Jackson <ian.jackson.citrix.com>
Olaf Hering [Fri, 10 Jun 2011 08:47:10 +0000 (10:47 +0200)]
xenpaging: drop xc.c, move xc_mem_paging_flush_ioemu_cache
Move xc_mem_paging_flush_ioemu_cache() into xenpaging and massage it a bit to
use the required members from xenpaging_t.
Also update type of rc to match xs_write() return value.
Signed-off-by: Olaf Hering <olaf@aepfle.de> Committed-by: Ian Jackson <ian.jackson.citrix.com>
Olaf Hering [Fri, 10 Jun 2011 08:47:03 +0000 (10:47 +0200)]
tools: merge several bitop functions into xc_bitops.h
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>
Olaf Hering [Fri, 10 Jun 2011 08:47:02 +0000 (10:47 +0200)]
xenpaging: remove unused spinlock in pager
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>
Olaf Hering [Fri, 17 Jun 2011 12:11:52 +0000 (14:11 +0200)]
xenctx: move xc_* access out of dump_ctx
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>
Daniel Stodden [Tue, 21 Jun 2011 14:38:52 +0000 (15:38 +0100)]
tools: xen-ringwatch: spot, and work around, broken frontend/backend ring I/O
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>
Tim Deegan [Mon, 20 Jun 2011 12:16:14 +0000 (13:16 +0100)]
x86/mm/shadow: adjust early-unshadow heuristic for PAE guests.
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.
pv-on-hvm: hvm_domain_use_pirq return positive no matter if the evtchn is bound
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.
Juergen Gross [Thu, 16 Jun 2011 15:12:20 +0000 (16:12 +0100)]
Use same data array for INTEL and AMD cpufreq handling
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.