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The write side of these registers is never used and actually can't be
used as defined because any read/modify/write sequence from the guest
potentially races with qemu. Drop the write support and define these
as read-only registers.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Currently the virtio balloon device, when using the virtio-pci interface
advertises itself with PCI class code MEMORY_RAM. This is wrong; the
balloon is vaguely related to memory, but is nothing like a PCI memory
device in the meaning of the class code, and this code is not required
or suggested by the virtio PCI specification.
Worse, this patch causes problems on the pseries machine, because the
firmware, seeing this class code, advertises the device as memory in the
device tree, and then a guest kernel bug causes it to see this "memory"
before the real system memory, leading to a crash in early boot.
This patch fixes the problem by removing the bogus PCI class code on the
balloon device. The backwards compatibility PC machines get new compat
properties so that they don't change.
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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ivshmem used msix but didn't call it on either reset or
config write paths. This used to partically work since
guests don't use all of msi-x configuration fields,
and reset is rarely used, but the patch 'msix: track function masked
in pci device state' broke that. Fix by adding appropriate calls.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reported-by: Cam Macdonell <cam@cs.ualberta.ca>
Tested-by: Cam Macdonell <cam@cs.ualberta.ca>
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It's clear from the surrounding code that
start < end so it's enough to assert end < log_size.
However, it's better to make this explicit in case
we refactor the code again.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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When the vhost log is resized, we want to sync up to
the size of the old log. With that end address in place,
ignore regions that start after then end rather than
hitting assert.
This also addresses the following crash report:
When migrating a vm using vhost-net we hit the following assertion:
qemu-kvm: /usr/src/packages/BUILD/qemu-kvm-0.15.1/hw/vhost.c:30:
vhost_dev_sync_region: Assertion `start / (0x1000 * (8 *
sizeof(vhost_log_chunk_t))) < dev->log_size' failed.
The cases which the end < start check is intended to catch, such as
for vga video memory, will also likely trigger the assertion.
Reorder the code to handle this correctly.
Reported-by: Josh Durgin <josh.durgin@dreamhost.com>
Signed-off-by: Bruce Rogers <brogers@suse.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Make it easier to add compat properties, by
adding macros for properties duplicated across
machine types.
Note: there could be bugs in compat properties,
this patch does not attempt to address them,
the code is bug for bug identical to the original.
Tested by: generated a preprocessed file, sorted and
compared to sorted original.
Lightly tested on x86_64.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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There is a typo in i440FX init code. This is causing problems when
somebody wants to access the 64bit PCI range.
Signed-off-by: Alexey Korolev <alexey.korolev@endace.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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* commit 'ff71f2e8cacefae99179993204172bc65e4303df': (21 commits)
rtl8139: do the network/host communication only in normal operating mode
rtl8139: correctly check the opmode
net: move compute_mcast_idx() to net.h
rtl8139: support byte read to TxStatus registers
rtl8139: remove unused marco
rtl8139: limit transmission buffer size in c+ mode
pci_regs: Add PCI_EXP_TYPE_PCIE_BRIDGE
virtio-net: add DATA_VALID flag
pci_bridge: upper 32 bit are long registers
pci: fix bridge IO/BASE
pcie: drop functionality moved to core
pci: set memory type for memory behind the bridge
pci: add standard bridge device
slotid: add slot id capability
shpc: standard hot plug controller
pci_bridge: user-friendly default bus name
pci: make another unused extern function static
pci: don't export an internal function
pci_regs: Fix value of PCI_EXP_TYPE_RC_EC.
pci: Do not check if a bus exist in pci_parse_devaddr.
...
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According the spec, the card works in network/host communication mode only when
both EEM1 and EEM0 are unset in 93C46 Command Register (normal op
mode). So this patch check these bits before trying to receive packets.
As some guest driver (such as linux, see cp_init_hw() in 8139cp.c)
allocate rx ring after the recevier were enabled, this would cause our
emulation codes tries to dma into guest memory when the rx descriptor
is not properly configured. This patch fixes this.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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According to the spec, only when opmode is "Config. Register Write
Enable" could driver write to CONFIG0,1,3,4 and bits 13,12,8 of BMCR.
Currently, we allow modifying to those registers also when 8139 is in
"Auto-load" mode and "93C46 (93C56) Programming" mode. This patch
fixes this.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Reduce duplicated codes.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Some drivers (such as win7) use byte read for TxStatus registers, so we need to
support this to let guest driver behave correctly.
For writing, only double-word access is allowed by spec.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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The tx buffer would be re-allocated for tx descriptor with big size
and without LS bit set, this would make guest driver could easily let
qemu to allocate unlimited.
In linux host, a glib failure were easy to be triggered:
GLib-ERROR **: gmem.c:176: failed to allocate 18446744071562067968 bytes
This patch fix this by adding a limit. As the spec didn't tell the maximum size
of buffer allowed, stick it to current CP_TX_BUFFER_SIZE (65536).
Changes from V1:
Drop the while statement and s->cplus_txbuffer check.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Add DATA_VALID flag from the Linux header, to
keep us in sync with that.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Use pci_set_long for accesses.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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commit 5caef97a16010f818ea8b950e2ee24ba876643ad introduced
a regression: we do not make IO base/limit upper 16
bit registers writeable, so we should report a 16 bit
IO range type, not a 32 bit one.
Note that PCI_PREF_RANGE_TYPE_32 is 0x0, but PCI_IO_RANGE_TYPE_32 is 0x1.
In particular, this broke sparc64.
Note: this just reverts to behaviour prior to the commit above.
Making PCI_IO_BASE_UPPER16 and PCI_IO_LIMIT_UPPER16
registers writeable should, and seems to, work just as well, but
as no system seems to actually be interested in 32 bit IO,
let's not make unnecessary changes.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Now that core sets memory type correctly,
remove this code from pcie port implementation.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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As we make upper bits in IO and prefetcheable memory
registers writeable, we should declare support
for 64 bit prefetcheable memory and 32 bit io
in the bridge.
This changes the default for apb, dec, but I'm guessing
they got the defaults wrong by accident.
Alternatively, we could let bridges declare lack of
64 bit support and make the upper bits read-only zero.
Reported-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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This adds support for a standard pci to pci bridge,
enabling support for more than 32 PCI devices in the system.
Device hotplug is supported by means of SHPC controller.
For guests with an SHPC driver, this allows robust hotplug
and even hotplug of nested bridges, up to 31 devices
per bridge.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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This capability makes it possible for the guest to
report a unique chassis identifier to the user.
The spec also recommends making chassis indentifier
persist in eeprom.
This isn't implemented.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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This adds support for SHPC interface, as defined by PCI Standard
Hot-Plug Controller and Subsystem Specification, Rev 1.0
http://www.pcisig.com/specifications/conventional/pci_hot_plug/SHPC_10
Only SHPC intergrated with a PCI-to-PCI bridge is supported,
SHPC integrated with a host bridge would need more work.
All main SHPC features are supported:
- MRL sensor
- Attention button
- Attention indicator
- Power indicator
Wake on hotplug and serr generation are stubbed out but unused
as we don't have interfaces to generate these events ATM.
One issue that isn't completely resolved is that qemu currently
expects an "eject" interface, which SHPC does not provide: it merely
removes the power to device and it's up to the user to remove the device
from slot. This patch works around that by ejecting the device
when power is removed and power LED goes off.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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For a pci bridge device, if we don't override
the name with custom code, the bus will be addressed as
<id>.0, where id is the id specified by the user.
Since PCI Bridge devices have a single bus each, we don't need
the index: address the bus using the parent device name.
This is better since this way users don't care about
our internal bus/device distinctions.
As far as I could see, we only have built-in
bridges at this point which always override the
name. So this change will only affect ioh3420.c.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Make pci_find_bus static and rename to pci_find_bus_nr to match
functionality.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Make an internal function, pci_parse_devaddr,
static.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Value check in PCI Express Base Specification rev 1.1
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Actually, pci_parse_devaddr checks if the dom/bus of the PCI address exist. But
this should be the jobs of a caller. In fact, the two callers of this function
will try to retrieve the PCIBus related to the devaddr and return an error if
they cannot.
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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* qmp/queue/qmp:
qapi: convert device_del
qdev: qdev_unplug(): use error_set()
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Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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It currently uses qerror_report(), but next commit will convert
the drive_del command to the QAPI and this requires using
error_set().
One particularity of qerror_report() is that it knows when it's
running on monitor context or command-line context and prints the
error message accordingly. error_set() doesn't do this, so we
have to be careful not to drop error messages.
qdev_unplug() has three kinds of usages:
1. It's called when hot adding a device fails, to undo anything
that has been done before hitting the error
2. It's called by function monitor functions like device_del(),
to unplug a device
3. It's used by xen_platform.c in a way that doesn't _seem_ to
be in monitor context
Only item 2 can print an error message to the user, this commit
maintains that.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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* kwolf/for-anthony: (46 commits)
qed: remove incoming live migration blocker
qed: honor BDRV_O_INCOMING for incoming live migration
migration: clear BDRV_O_INCOMING flags on end of incoming live migration
qed: add bdrv_invalidate_cache to be called after incoming live migration
blockdev: open images with BDRV_O_INCOMING on incoming live migration
block: add a function to clear incoming live migration flags
block: Add new BDRV_O_INCOMING flag to notice incoming live migration
block stream: close unused files and update ->backing_hd
qemu-iotests: Fix call syntax for qemu-io
qemu-iotests: Fix call syntax for qemu-img
qemu-iotests: Test unknown qcow2 header extensions
qemu-iotests: qcow2.py
sheepdog: fix send req helpers
sheepdog: implement SD_OP_FLUSH_VDI operation
block: bdrv_append() fixes
qed: track dirty flag status
qemu-img: add dirty flag status
qed: image fragmentation statistics
qemu-img: add image fragmentation statistics
block: document job API
...
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Signed-off-by: Benoit Canet <benoit.canet@gmail.com>
Reviewed-by: Stefan Hajnoczi <stefanha@gmail.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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From original commit with Patchwork-id: 31108 by
Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
"The QED image format includes a file header bit to mark images dirty.
QED normally checks dirty images on open and fixes inconsistent
metadata. This is undesirable during live migration since the dirty bit
may be set if the source host is modifying the image file. The check
should be postponed until migration completes.
Skip operations that modify the image file if the BDRV_O_INCOMING flag
is set."
Signed-off-by: Benoit Canet <benoit.canet@gmail.com>
Reviewed-by: Stefan Hajnoczi <stefanha@gmail.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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Signed-off-by: Benoît Canet <benoit.canet@gmail.com>
Reviewed-by: Stefan Hajnoczi <stefanha@gmail.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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The QED image is reopened to flush metadata and check consistency.
Signed-off-by: Benoit Canet <benoit.canet@gmail.com>
Reviewed-by: Stefan Hajnoczi <stefanha@gmail.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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Open images with BDRV_O_INCOMING in order to inform block drivers
that an incoming live migration is coming.
Signed-off-by: Benoit Canet <benoit.canet@gmail.com>
Reviewed-by: Stefan Hajnoczi <stefanha@gmail.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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This function will clear all BDRV_O_INCOMING flags.
Signed-off-by: Benoit Canet <benoit.canet@gmail.com>
Reviewed-by: Stefan Hajnoczi <stefanha@gmail.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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From original patch with Patchwork-id: 31110 by
Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
"Add a flag to indicate that incoming migration is pending and care needs
to be taken for data consistency. Block drivers should not modify the
image file before incoming migration is complete since the migration
source host is still using the image file."
The rationale for not using bdrv->read_only is the following.
"Unfortunately this is not possible because too many other places in QEMU
test bdrv_is_read_only() and use it for their own evil purposes. For
example, ide_init_drive() will error out because read-only harddisks are
not supported. We're mixing guest and host side read-only concepts so
this simpler alternative does not work."
Signed-off-by: Benoit Canet <benoit.canet@gmail.com>
Reviewed-by: Stefan Hajnoczi <stefanha@gmail.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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Close the now unused images that were part of the previous backing file
chain and adjust ->backing_hd, backing_filename and backing_format
properly.
Fixes https://bugzilla.redhat.com/show_bug.cgi?id=801449
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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qemu-io requires options first, then fixed parameters.
GNU getopt also allows options at the end, but POSIX getopt
doesn't. Try "export POSIXLY_CORRECT=y" to get the POSIX
behaviour with GNU getopt, too.
Cc: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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qemu-img requires first options, then file name, then size.
GNU getopt also allows options at the end, but POSIX getopt
doesn't. Try "export POSIXLY_CORRECT=y" to get the POSIX
behaviour with GNU getopt, too.
Cc: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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The immportant thing here is that header extensions don't get silently
dropped when the header is rewritten, e.g. during a rebase.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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This adds a tool that is meant to inspect and edit qcow2 files in a
low-level way, that wouldn't be possible with qemu-img/io, for example
by adding yet unknown extensions or flags. This way we can test whether
qemu deals properly with future backwards compatible extensions.
For now, let's start with the image header and header extensions.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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We should return if reading of the header fails.
Cc: Kevin Wolf <kwolf@redhat.com>
Cc: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp>
Signed-off-by: Liu Yuan <tailai.ly@taobao.com>
Acked-by: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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Flush operation is supposed to flush the write-back cache of
sheepdog cluster.
By issuing flush operation, we can assure the Guest of data
reaching the sheepdog cluster storage.
Cc: Kevin Wolf <kwolf@redhat.com>
Cc: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp>
Signed-off-by: Liu Yuan <tailai.ly@taobao.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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A few fixups for bdrv_append():
The new bs (bs_new) passed into bdrv_append() should be anonymous. Rather
than call bdrv_make_anon() to enforce this, use an assert to catch when a caller
is passing in a bs_new that is not anonymous.
Also, the new top layer should have its backing_format reflect the original
top's format.
And last, after the swap of bs contents, the device_name will have been copied
down. This needs to be cleared to reflect the anonymity of the bs that was
pushed down.
Signed-off-by: Jeff Cody <jcody@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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Signed-off-by: Dong Xu Wang <wdongxu@linux.vnet.ibm.com>
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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Some block drivers can verify their image files are clean or not. So we can show
it while using "qemu-img info".
Signed-off-by: Dong Xu Wang <wdongxu@linux.vnet.ibm.com>
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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