Now that do have a nicer interface to work against we can add Linux native
AIO support. It's an extremly thing layer just setting up an iocb for
the io_submit system call in the submission path, and registering an
eventfd with the qemu poll handler to do complete the iocbs directly
from there.
This started out based on Anthony's earlier AIO patch, but after
estimated 42,000 rewrites and just as many build system changes
there's not much left of it.
To enable native kernel aio use the aio=native sub-command on the
drive command line. I have also added an option to qemu-io to
test the aio support without needing a guest.
Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Currently the raw-posix.c code contains a lot of knowledge about the
asynchronous I/O scheme that is mostly implemented in posix-aio-compat.c.
All this code does not really belong here and is getting a bit in the
way of implementing native AIO on Linux.
So instead move all the guts of the AIO implementation into
posix-aio-compat.c (which might need a better name, btw).
There's now a very small interface between the AIO providers and raw-posix.c:
- an init routine is called from raw_open_common to return an AIO context
for this drive. An AIO implementation may either re-use one context
for all drives, or use a different one for each as the Linux native
AIO support will do.
- an submit routine is called from the aio_reav/writev methods to submit
an AIO request
There are no indirect calls involved in this interface as we need to
decide which one to call manually. We will only call the Linux AIO native
init function if we were requested to by vl.c, and we will only call
the native submit function if we are asked to and the request is properly
aligned. That's also the reason why the alignment check actually does
the inverse move and now goes into raw-posix.c.
The old posix-aio-compat.h headers is removed now that most of it's
content is private to posix-aio-compat.c, and instead we add a new
block/raw-posix-aio.h headers is created containing only the tiny interface
between raw-posix.c and the AIO implementation.
Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Amit Shah [Wed, 12 Aug 2009 19:20:28 +0000 (00:50 +0530)]
pci ids: remove redundant defines
Remove some redundant definitions for PCI classes:
PCI_CLASS_SERIAL_OTHER already exists as PCI_CLASS_COMMUNICATION_OTHER
and PCI_CLASS_PROCESSOR_CO is redefined.
PCI_CLASS_SERIAL_OTHER is not used anywhere.
Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Juan Quintela [Thu, 20 Aug 2009 17:42:25 +0000 (19:42 +0200)]
New VMstate save/load infrastructure
This patch introduces VMState infrastructure, to convert the save/load
functions of devices to a table approach. This new approach has the
following advantages:
- it is type-safe
- you can't have load/save functions out of sync
- will allows us to have new interesting commands, like dump <device>, that
shows all its internal state.
- Just now, the only added type is arrays, but we can add structures.
- Uses old load_state() function for loading old state.
Signed-off-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Juan Quintela [Thu, 20 Aug 2009 17:42:20 +0000 (19:42 +0200)]
split do_loadvm() into do_loadvm() and load_vmstate()
do_loadvm() is now called from the monitor.
load_vmstate() is called by do_loadvm() and when -loadvm command line is used.
Command line don't have to play games with vmstop()/vmstart()
Signed-off-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Kevin Wolf [Mon, 17 Aug 2009 13:50:10 +0000 (15:50 +0200)]
qcow2: Metadata preallocation
This introduces a qemu-img create option for qcow2 which allows the metadata to
be preallocated, i.e. clusters are reserved in the refcount table and L1/L2
tables, but no data is written to them. Metadata is quite small, so this
happens in almost no time.
Especially with qcow2 on virtio this helps to gain a bit of performance during
the initial writes. However, as soon as create a snapshot, we're back to the
normal slow speed, obviously. So this isn't the real fix, but kind of a cheat
while we're still having trouble with qcow2 on virtio.
Note that the option is disabled by default and needs to be specified
explicitly using qemu-img create -f qcow2 -o preallocation=metadata.
Signed-off-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Jes Sorensen [Fri, 14 Aug 2009 09:36:15 +0000 (11:36 +0200)]
Add isa_reserve_irq().
Introduce isa_reserve_irq() which marks an irq reserved and returns
the appropriate qemu_irq entry from the i8259 table.
isa_reserve_irq() is a temporary interface to be used to allocate ISA
IRQs for devices which have not yet been converted to qdev, and for
special cases which are not suited for qdev conversions, such as the
'ferr'.
This patch goes on top of Gerd Hoffmann's which makes isa-bus.c own
the ISA irq table.
[ added isa-bus.o to some targets to fix build failures -- kraxel ]
Gerd Hoffmann [Fri, 14 Aug 2009 09:36:14 +0000 (11:36 +0200)]
isa bus irq changes and fixes.
Changes:
(1) make isa-bus maintain isa irqs, complain when allocating
already taken irqs.
(2) note that (1) works only for isa devices converted to qdev
already (floppy and ps2/kbd/mouse right now), so more work
is needed to make this really useful.
(3) split floppy init into isa and sysbus versions.
(4) add sysbus->isa bridge & fix -M isapc breakage.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Naphtali Sprei [Thu, 13 Aug 2009 12:01:20 +0000 (15:01 +0300)]
hw/eepro100.c: Use extended TBD only where applicable
Bug fix for segfault when run as i82551 HW:
Use Extended TBD only when HW supports it (i82558 and up).
Added assertions to guard from such buffer overflow
Introduce the MAX_TCB_BYTE_COUNT macro
Allocate buf big enough as HW needs (MAX_ETH_FRAME_SIZE -> MAX_TCB_BYTE_COUNT)
I don't feel 100% OK with the "s->device >= i82558B" condition
since it relies on the numeric (hex) value of those defines, which currently
is correct, but changes (which I don't forsee now) might break it.
Signed-off-by: Naphtali Sprei <nsprei@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
pci-hotplug: initialize dinfo to NULL in pci_device_hot_add
Suppress the following compiler warning emitted by at least gcc version 4.2.1 (SUSE Linux)
and gcc version 3.4.5 (mingw32 special):
hw/pci-hotplug.c: In function 'pci_device_hot_add':
hw/pci-hotplug.c:102: warning: 'dinfo' may be used uninitialized in this function
hw/pci-hotplug.c:102: note: 'dinfo' was declared here
Signed-off-by: Sebastian Herbszt <herbszt@gmx.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Stefan Weil [Fri, 14 Aug 2009 19:50:02 +0000 (21:50 +0200)]
block/vdi.c: Fix several bugs
* The code for option '-static' was wrong, so image creation
always created static images.
* Static images created with qemu-img did not set header entry
blocks_allocated.
* The size of the block map must be rounded to the next multiple
of SECTOR_SIZE, otherwise the block map is only read partially
for block map sizes which are not a multiple of SECTOR_SIZE.
Signed-off-by: Stefan Weil <weil@mail.berlios.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Andre Przywara [Thu, 20 Aug 2009 21:34:17 +0000 (23:34 +0200)]
introduce kvm64 CPU
In addition to the TCG based qemu64 type let's introduce a kvm64 CPU type,
which is the least common denominator of all KVM-capable x86-CPUs
(based on Intel Pentium 4 Prescott). It can be used as a base type
for migration.
Signed-off-by: Andre Przywara <andre.przywara@amd.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Andre Przywara [Thu, 20 Aug 2009 19:03:48 +0000 (21:03 +0200)]
allow overriding of CPUID level on command line
The CPUID level determines how many CPUID leafs are exposed to the guest.
Some features (like multi-core) cannot be propagated without the proper
level, but guests maybe confused by bogus entries in some leafs.
So add level= and xlevel= to the list of -cpu options to allow the user to
override the default settings. While at it, merge unnecessary local
variables into one and allow hexadecimal arguments.
Signed-off-by: Andre Przywara <andre.przywara@amd.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Andre Przywara [Wed, 19 Aug 2009 13:42:42 +0000 (15:42 +0200)]
set CPUID bits to present cores and threads topology
Controlled by the enhanced -smp option set the CPUID bits to present the
guest the desired topology. This is vendor specific, but (with the exception
of the CMP_LEGACY bit) not conflicting, so we set all bits everytime.
There is no real multithreading support for AMD CPUs, so report cores
instead.
Signed-off-by: Andre Przywara <andre.przywara@amd.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Andre Przywara [Wed, 19 Aug 2009 13:42:40 +0000 (15:42 +0200)]
extend -smp parsing to include cores= and threads= options
For injecting multi-core and multi-threading CPU topology into guests
extend the -smp syntax to accommodate cores and threads specification.
Syntax: -smp smp_value[,cores=nr_cores][,threads=nr_threads]\
[,socket=nr_sockets][,maxcpus=max_cpus]
smp_value is the legacy value specifying the total number of vCPUs for
the guest. If you specify one of cores, threads or sockets this value
can be omitted. Missing values will be computed to fulfill:
smp_value = nr_cores * nr_threads * nr_sockets
where it will favour sockets over cores over threads (to mimic the
current behavior, which will only inject multiple sockets.)
So -smp 4,threads=2 will inject two sockets with 2 threads each,
-smp cores=4 is an abbreviation for -smp 4,cores=4,threads=1,sockets=1.
If max_cpus (the number of hotpluggable CPUs) is omitted, it will
be set to smp_value.
Signed-off-by: Andre Przywara <andre.przywara@amd.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Blue Swirl [Tue, 25 Aug 2009 18:29:36 +0000 (18:29 +0000)]
Sparc32: improve interrupt handling
Level 15 interrupts are broadcast to all CPUs, each CPU can clear the
interrupt using the local Clear Pending register.
Update intbit_to_level table.
Don't try to raise level 0 interrupts.
Calculate pending interrupts based on the separate inputs from master
register. Setting or resetting the pending level isn't correct because of
overlap of levels.
Level 14 is always used for CPU timer interrupts, remove the property.
Nathan Froyd [Tue, 25 Aug 2009 15:20:00 +0000 (08:20 -0700)]
target-mips: fix conditional moves off fp condition codes
Conditional moves off fp condition codes were using the result of
get_fp_bit to isolate and test the relevant condition code. However,
get_fp_bit returns the bit number of the condition code, not a
bitmask. (Compare the use of get_fp_bit in gen_compute_branch1, for
instance.)
Fixed by shifting a bitmask into place using the result of get_fp_bit in
the relevant functions (gen_mov{ci,cf_s,cf_d,cf_ps}).
Anthony Liguori [Fri, 14 Aug 2009 16:20:47 +0000 (11:20 -0500)]
Make the e1000 the default network adapter for the pc target.
The ne2k is an ancient card that performs pretty terribly under QEMU. In many
modern OSes, there is no longer drivers available for the ne2k.
Switch the default network adapter to e1000. This card is more widely
suppported and performs rather well under QEMU. There may be very old OSes
that had a ne2k driver but not an e1000 driver but I think this is likely the
exception.
I think the average user is better served with an e1000 vs ne2k.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Nathan Froyd [Tue, 11 Aug 2009 19:47:59 +0000 (12:47 -0700)]
eliminate errors about unused results in block/vpc.c
These errors come up when compiling with gcc-4.3.3 and some older headers:
/scratch/froydnj/qemu.git/block/vpc.c: In function 'vpc_create':
/scratch/froydnj/qemu.git/block/vpc.c:514: error: value computed is not used
/scratch/froydnj/qemu.git/block/vpc.c:516: error: value computed is not used
/scratch/froydnj/qemu.git/block/vpc.c:517: error: value computed is not used
/scratch/froydnj/qemu.git/block/vpc.c:566: error: value computed is not used
Use memcpy to copy the strings instead of strncpy.
Signed-off-by: Nathan Froyd <froydnj@codesourcery.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
As requested by Anthony make pthreads mandatory. This means we will always
have AIO available on posix hosts, and it will also allow enabling the I/O
thread unconditionally once it's ready.
Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
virtio-pci depends, and will always depend, on pci.c
so it makes sense to keep it in the same makefile,
(unlike the rest of virtio files which should eventually
be moved out to Makefile.hw).
Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Nathan Froyd [Mon, 10 Aug 2009 20:37:36 +0000 (13:37 -0700)]
cleanup cpu-exec.c, part 0/N: consolidate handle_cpu_signal
handle_cpu_signal is very nearly copy-paste code for each target, with a
few minor variations. This patch sets up appropriate defaults for a
generic handle_cpu_signal and provides overrides for particular targets
that did things differently. Fixing things like the persistent (XXX:
use sigsetjmp) should now become somewhat easier.
Previous comments on this patch suggest that the "activate soft MMU for
this block" comments refer to defunct functionality. I have removed
such blocks for the appropriate targets in this patch.
Signed-off-by: Nathan Froyd <froydnj@codesourcery.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Paolo Bonzini [Wed, 12 Aug 2009 12:17:35 +0000 (14:17 +0200)]
unify popen/fopen qemu wrappers
While reading Chris's code for fd migration I noticed the duplication
between QEMUFilePopen and QEMUFileStdio. This fixes it, and makes
qemu_fopen more similar qemu_popen.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Anthony Liguori [Mon, 10 Aug 2009 22:07:24 +0000 (17:07 -0500)]
Unbreak large mem support by removing kqemu
kqemu introduces a number of restrictions on the i386 target. The worst is that
it prevents large memory from working in the default build.
Furthermore, kqemu is fundamentally flawed in a number of ways. It relies on
the TSC as a time source which will not be reliable on a multiple processor
system in userspace. Since most modern processors are multicore, this severely
limits the utility of kqemu.
kvm is a viable alternative for people looking to accelerate qemu and has the
benefit of being supported by the upstream Linux kernel. If someone can
implement work arounds to remove the restrictions introduced by kqemu, I'm
happy to avoid and/or revert this patch.
N.B. kqemu will still function in the 0.11 series but this patch removes it from
the 0.12 series.
Paul, please Ack or Nack this patch.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Add a configure switch to enable / disable all user targets. I felt compelled to do it for symmetry, mostly it is useful to disable user targets when you don't want to build them.
Signed-off-by: Zachary Amsden <zamsden@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Implement migration via unix sockets. While you can fake this using
exec and netcat, this involves forking another process and is
generally not very nice. By doing this directly in qemu, we can avoid
the copy through the external nc command. This is useful for
implementations (such as libvirt) that want to do "secure" migration;
we pipe the data on the sending side into the unix socket, libvirt
picks it up, encrypts it, and transports it, and then on the remote
side libvirt decrypts it, dumps it to another unix socket, and
feeds it into qemu.
The implementation is straightforward and looks very similar to
migration-exec.c and migration-tcp.c
Signed-off-by: Chris Lalancette <clalance@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Avi Kivity [Sun, 9 Aug 2009 16:44:55 +0000 (19:44 +0300)]
Route PC irqs to ISA bus instead of i8259 directly
A PC has its motherboard IRQ lines connected to both the PIC and IOAPIC.
Currently, qemu routes IRQs to the PIC which then calls the IOAPIC, an
incestuous arrangement. In order to clean this up, create a new ISA IRQ
abstraction, and have devices raise ISA IRQs (which in turn raise the i8259
IRQs as usual).
Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Jes Sorensen [Thu, 6 Aug 2009 14:25:50 +0000 (16:25 +0200)]
QEMU set irq0override in fw_cfg
Hi,
After discussing the issue with Avi, Gleb and a couple others on irq,
we came to the conclusion that it is preferred to have QEMU request
features from the BIOS, rather than notifying the BIOS that it is
running on QEMU or KVM. This way memory ranges can change etc. and
an older BIOS will continue to work on newer QEMU if it receives the
info as a fw_cfg value.
This one also matches what qemu-kvm does for irq0override, except I
haven't made it configurable. I leave that as an exercise for whoever
would be interested in switching off irq0override.
Thanks,
Jes
Set irq0 override in fw_cfg, informing the BIOS that QEMU expects
override on irq0. This matches qemu-kvm, and will help sharing a
single BIOS binary.
Signed-off-by: Jes Sorensen <jes@sgi.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Brian Wheeler [Fri, 7 Aug 2009 19:33:04 +0000 (15:33 -0400)]
SMART ATA Functionality
For the lulz I implemented basic SMART functionality in ide.c. smartctl
on linux recognizes it just fine and starting self tests with it
complete successfully.
Signed-off-by: Brian Wheeler <bdwheele@indiana.edu> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
When trying to do detached migration with exec, I found that
the monitor wouldn't always return in a timely manner. I
tracked this down to exec_start_outgoing_migration. It
appeared we were setting the fd to NONBLOCK'ing, but in
point of fact we weren't.
This bugfix should also go onto the stable 0.10 branch
Signed-off-by: Chris Lalancette <clalance@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Hi all,
currently the vga screen_dump code doesn't use the DisplayState
interface properly and tries to replace it temporarily while taking the
screenshot.
A better approach is to register a DisplayChangeListener, call
vga_hw_update, and finally write the ppm in the next call from dpy_update.
Testing is appreciated.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Reimar Döffinger [Sun, 23 Aug 2009 16:03:34 +0000 (18:03 +0200)]
sdl.c: support 32 bpp cursors
Hello,
currently when a 32 bpp cursor gets defined the result is all-black in
the areas that are not transparent (you'll get a 32 bpp cursor if you
use my previous patch to allow vmware_vga to use a 32 bpp framebuffer).
This is because the switch in sdl.c lacks a 32 bpp case.
The thing I am unsure about though is which byte is the unused one and
should be skipped, the first or the last - for the black-and-white
cursors I tested it doesn't make a difference...
Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de> Signed-off-by: Andrzej Zaborowski <balrogg@gmail.com>
Reimar Döffinger [Sun, 23 Aug 2009 16:00:33 +0000 (18:00 +0200)]
Use corect depth from DisplaySurface in vmware_vga.c
Hello,
for what I can tell, there is no way for vmware_vga to work correctly
right now. It assumes that the framebuffer bits-per-pixel and the one
from the DisplaySurface are identical (it uses directly the VRAM from
vga.c), but it always assumes 3 bytes per pixel, which is never possible
with the current version of DisplaySurface.
Attached patch fixes that by using ds_get_bits_per_pixel.
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