Every system should have some sort of main system bus,
so sysbus_get_default should always return a valid bus.
Without this patch, at least mipssim and malta no longer
start but raise a null pointer access exception (caused by
commit ec990eb622).
Cc: Anthony Liguori <anthony@codemonkey.ws>
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Using bus numbers in migration is clearly wrong as
they are guest assigned. Not really sure what the
right thing to do is, for now stick 0 in there so things
keep working for non-nested setups, add a TODO.
We also probably have to mark nested bridges as non-migrateable
until this is fixed?
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Alex Williamson <alex.williamson@redhat.com>
Avoid these warnings with GCC 4.6.0:
/src/qemu/hw/ide/ahci.c: In function 'ahci_reset_port':
/src/qemu/hw/ide/ahci.c:810:14: error: variable 'tfd' set but not used [-Werror=unused-but-set-variable]
/src/qemu/hw/ide/ahci.c: In function 'handle_cmd':
/src/qemu/hw/ide/ahci.c:1103:19: error: variable 'pr' set but not used [-Werror=unused-but-set-variable]
In the tfd variable case, fix the logic also.
CC: Alexander Graf <agraf@suse.de>
CC: Kevin Wolf <kwolf@redhat.com>
Acked-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This patch replaces explicit bswaps with endianness hints to the
mmio layer.
CC: Alexander Graf <agraf@suse.de>
Acked-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
ledma has 0x20 bytes of registers according to OBP, and at least Solaris9
reads the 5th register which is beyond what we've mapped. So let's setup
a flag (inspired by a previous patch from Blue Swirl) to identify ledma
from espdma, and map another 16 bytes of registers which return 0.
Signed-off-by: Bob Breuer <breuerr@mc.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Support discards via the WRITE SAME command with the unmap bit set, and
tell the initiator about the support for it via the block limit and the
new thin provisioning EVPD pages. Also fix the comment which incorrectly
describedthe block limits EVPD page.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
We register the vm change state handler in a PCI BAR map() function.
This function can be called multiple times throughout the lifetime of a
PCI IDE device. This results in duplicate vm change state handlers
being register, none of which are ever unregistered.
Instead, register the vm change state handler in the device's init
function once and for all.
piix tested, cmd646 and via not tested.
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
ATAPI also can do ncq, so let's expose the capability.
This patch makes CD-ROM support work on Windows 7 for me.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Set SATA Mode Select to AHCI in the Address Map Register.
Signed-off-by: Sebastian Herbszt <herbszt@gmx.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This patch adds an emulation layer for an ICH-9 AHCI controller. For now
this controller does not do IDE legacy emulation. It is a pure AHCI controller.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
We need a PCI ID for our new AHCI adapter. I just picked an ICH-9
because that's the one in the Q35 chipset.
This patch adds a PCI ID define for an ICH-9 AHCI adapter.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
I modified ide_identify() to include the zero-based queue length
value in word 75, and set bit 8 in word 76 to signal NCQ support
in the identify data for AHCI SATA drives.
Signed-off-by: Roland Elek <elek.roland@gmail.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
We hook into transfer_start and immediately call the end function
for ahci. This means that everything needs to be in place for the
end function when we start the transfer, so let's move the function
down to where all state is in place.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
The ATA core is currently heavily intertwined with BMDMA code. Let's loosen
that a bit, so we can happily replace the DMA backend with different
implementations.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Now that we have the function split out, we have to reindent it.
In order to increase the readability of the actual functional change,
this is split out.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
The ATA command interpretation code can be used for PATA and SATA
interfaces alike. So let's split it out into a separate function.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit causes the watchdog timer to be reset when a guest is
hard-rebooted.
The failure case previously was as follows:
(a) guest boots, watchdog is enabled
(b) guest does a reset eg:
echo 'b' > /proc/sysrq-trigger
(note that an ordinary /sbin/reboot wouldn't hit this case
since as the watchdog daemon is shut down, the daemon would
properly disable the watchdog device)
(c) the reboot takes longer than the remaining time on the
watchdog
(d) the watchdog therefore fires during the reboot
(e) probably the VM would just reboot again at this point which
is pretty benign, but it could depend on the action that the
user had selected for the watchdog
Now we use the qdev reset function to register a reset handler
which disables the timer. Note the handler is called _either_
just after init _or_ when the guest reboots.
In the i6300esb case there is a small refactoring of the code so
that the device's internal state is now fully restored to defaults
on a reboot.
Signed-off-by: Richard W.M. Jones <rjones@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Change fw_cfg_add_file() to get full file path as a parameter instead
of building one internally. Two reasons for that. First caller may need
to know how file is named. Second this moves policy of file naming out
from fw_cfg. Platform may want to use more then two levels of
directories for instance.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
If bootindex is specified on command line a string that describes device
in firmware readable way is added into sorted list. Later this list will
be passed into firmware to control boot order.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Ports on root hub will have NULL here. This is needed to reconstruct
path from device to its root hub to build device path.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Store all io ports used by device in ISADevice structure.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
New get_fw_dev_path callback will be used for build device path usable
by firmware in contrast to qdev qemu internal device path.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Add "fw_name" to DeviceInfo to use in device path building. In
contrast to "name" "fw_name" should refer to functionality device
provides instead of particular device model like "name" does.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
The device shall set its default hardware state after each reset.
This includes that the timer is stopped which is especially important
if the guest does a reboot independantly of a watchdog bite. I moved
the initialization of the state variables completely from the init
to the reset function which is called right after init during the
first boot and afterwards during each reboot.
Signed-off-by: Bernhard Kohl <bernhard.kohl@nsn.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Minor clean-up in isa-bus.c. Using hw_error is more consistent.
There is a difference however: hw_error dumps the cpu state.
Signed-off-by: Tristan Gingold <gingold@adacore.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This patch replaces explicit bswaps with endianness hints to the
mmio layer.
Because we don't depend on the target endianness anymore, we can also
move the driver over to Makefile.objs.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This patch converts the ISA MMIO bridge code to always use little endian mmio.
All bswap code that existed was only there to convert from native cpu
endianness to little endian ISA devices.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This patch replaces explicit bswaps with endianness hints to the
mmio layer.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This patch replaces explicit bswaps with endianness hints to the
mmio layer.
Because we don't depend on the target endianness anymore, we can also
move the driver over to Makefile.objs.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This patch replaces explicit bswaps with endianness hints to the
mmio layer.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This patch replaces explicit bswaps with endianness hints to the
mmio layer.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This patch replaces explicit bswaps with endianness hints to the
mmio layer.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This patch replaces explicit bswaps with endianness hints to the
mmio layer.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
The e1000 has compatibility code to handle big endianness which makes it
mandatory to be recompiled on different targets.
With the generic mmio endianness solution, there's no need for that anymore.
We just declare all mmio to be little endian and call it a day.
Because we don't depend on the target endianness anymore, we can also
move the driver over to Makefile.objs.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
There's no need to bswap once we correctly set the mmio to be little endian.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
The only reason we have bswap versions of the pci host code is that
most pci host devices are little endian. The ppc e500 is the only
odd one here, being big endian.
So let's directly pass the endianness down to the mmio layer and not
worry about it on the pci host layer.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
The device is only used on big endian systems, but always byte swaps. That's
a very good indicator that it's actually a little endian device ;-).
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
As an alternative to the 3 individual handlers, there is also a simplified
io mem hook function. To be consistent, let's add an endianness parameter
there too.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
As stated before, devices can be little, big or native endian. The
target endianness is not of their concern, so we need to push things
down a level.
This patch adds a parameter to cpu_register_io_memory that allows a
device to choose its endianness. For now, all devices simply choose
native endian, because that's the same behavior as before.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
qxl is a paravirtual graphics card. The qxl device is the bridge
between the guest and the spice server (aka libspice-server). The
spice server will send the rendering commands to the spice client, which
will actually render them.
The spice server is also able to render locally, which is done in case
the guest wants read something from video memory. Local rendering is
also used to support display over vnc and sdl.
qxl is activated using "-vga qxl". qxl supports multihead, additional
cards can be added via '-device qxl".
[ v2: add copyright to files ]
[ v2: use qemu-common.h for standard includes ]
[ v2: create separate qxl-vga device for primary ]
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Remove some unused variables and return values.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
config write handling for aer seems broken:
For example, it won't clear a level interrupt
when command register is set to 0.
Make it match the spec: level should equal
the logical or of enabled bits, msi only
be sent when the logical or changes.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Fix the injection logic upon aer message to follow 6.2.4.1.2 more
closely: specifically only send an msi interrupt when the logical or of
the enabled bits changed, not when a bit which was previously clear
becomes set.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
msi depends on pci but pci should not depend on msi.
The only dependency we have is a recent addition
of pci_msi_ functions, IMO they add little enough to
open-code in the small number of users.
Follow-up patches add more cleanups.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
pcie aer needs SERR bit to be writable, and the PCI spec requires
this as well. For compatibility, introduce compat global property
command_serr_enable and make this bit readonly for a pre 0.14 pc
machine.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Avoid sending out packets, and modifying
memory, when VM is stopped.
Add assert statements to verify this does not happen.
Avoid scheduling bh when vhost-net is started.
Stop bh when driver disabled bus mastering
(we must not access memory after this).
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Jason Wang <jasowang@redhat.com>
DMA into memory while VM is stopped makes it
hard to debug migration (consequitive saves
result in different files).
Fixing this completely is a large effort,
this patch does this for virtio-net.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Jason Wang <jasowang@redhat.com>
ffsl() is not universally available, so there are these warnings
on both mingw32 and OpenBSD:
/src/qemu/hw/pcie_aer.c: In function 'pcie_aer_update_log':
/src/qemu/hw/pcie_aer.c:399: warning: implicit declaration of function 'ffsl'
Since status field in PCIEAERErr is uint32_t, we can just use ffs() instead.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This patch introduce a fallback mechanism for old systems that do not
support utimensat(). This fix build failure with following warnings:
hw/virtio-9p-local.c: In function 'local_utimensat':
hw/virtio-9p-local.c:479: warning: implicit declaration of function 'utimensat'
hw/virtio-9p-local.c:479: warning: nested extern declaration of 'utimensat'
and:
hw/virtio-9p.c: In function 'v9fs_setattr_post_chmod':
hw/virtio-9p.c:1410: error: 'UTIME_NOW' undeclared (first use in this function)
hw/virtio-9p.c:1410: error: (Each undeclared identifier is reported only once
hw/virtio-9p.c:1410: error: for each function it appears in.)
hw/virtio-9p.c:1413: error: 'UTIME_OMIT' undeclared (first use in this function)
hw/virtio-9p.c: In function 'v9fs_wstat_post_chmod':
hw/virtio-9p.c:2905: error: 'UTIME_OMIT' undeclared (first use in this function)
[NOTE: At this time virtio-9p is only user of utimensat(), and is available
only when host is linux and CONFIG_VIRTFS is defined. So there are
no similar warning for win32. Please provide a wrapper for win32 in
oslib-win32.c if new user really requires it.]
v5:
- Allow fallback on runtime
- Move qemu_utimensat() to oslib-posix.c
- Rebased on latest qemu.git
v4:
- Use tv_now.tv_usec
v3:
- Use better alternative handling for UTIME_NOW/OMIT
- Move qemu_utimensat() to cutils.c
V2:
- Introduce qemu_utimensat()
Acked-by: Chris Wright <chrisw@sous-sol.org>
Acked-by: M. Mohan Kumar <mohan@in.ibm.com>
Acked-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Running fsstress with debug enabled causes assertion failure
because of inappropriate usage of debug print functions.
With this patch, fsstress passes without assertion failure.
Signed-off-by: Harsh Prateek Bora <harsh@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
SYNOPSIS
size[4] Tfsync tag[2] fid[4] datasync[4]
size[4] Rfsync tag[2]
DESCRIPTION
The Tfsync transaction transfers ("flushes") all modified in-core data of
file identified by fid to the disk device (or other permanent storage
device) where that file resides.
If datasync flag is specified data will be fleshed but does not flush
modified metadata unless that metadata is needed in order to allow a
subsequent data retrieval to be correctly handled.
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
We still need advance address even we find there's no dirty pages in
current chunk.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
I'd like to disable bandwidth limit or make it very high,
Use int64_t all over to make values >= 4g work.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Jason Wang <jasowang@redhat.com>
Whenever SSBM is reset in the command register all state information is lost.
Restarting DMA means that current_addr must be reset to the base address of the
PRD table. The OS is not required to change the base address register before
starting a DMA operation, it can reuse the value it wrote for an earlier
request.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
You can only start a DMA transfer if it's not running yet, and you can only
cancel it if it's running.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
BMIDEA in the status register must be cleared on error. This makes FreeBSD
respond (more) correctly to I/O errors.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Several places that stop a DMA transfer duplicate this code. Factor it out into
a common function.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
The core pcnet emulation code is used by both the PCI "pcnet" device
and the SPARC "lance" device. Split the common code frm the PCI code so
that that can be configures independantly.
Signed-off-by: Paul Brook <paul@codesourcery.com>
We parse the CDB twice, which is completely unnecessary.
Signed-off-by: Hannes Reinecke <hare@suse.de>
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
The current sense handling in scsi-bus is only used by the
scsi-disk driver; the scsi-generic driver is using its own.
So we should move the current sense handling into the
scsi-disk driver.
Signed-off-by: Hannes Reinecke <hare@suse.de>
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
We should announce and support the block device characterics page
only on block devices, not on CDROMs. And the VPD page 0x83 has
an off-by-one error.
Signed-off-by: Hannes Reinecke <hare@suse.de>
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Traditionally, the linux stack is using SCSI status codes
which are shifted by one as compared to those defined in SAM.
A SCSI emulation should naturally return the SAM defined codes,
not the linux ones.
So to avoid any confusion this patch modifies the existing
definitions to match those found in SAM and removes any
(now obsolete) byte-shift from the returned status codes.
Signed-off-by: Hannes Reinecke <hare@suse.de>
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
The SCSI parallel interface has a limit of 8 devices, but
not the SCSI stack in general. So we should be removing the
hard-coded limit and use MAX_SCSI_DEVS instead.
And we only need to scan those devices which are allocated
by the bus.
Signed-off-by: Hannes Reinecke <hare@suse.de>
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This patch can be applied to both qemu-xen and qemu and adds support
for empty write barriers to xen_disk.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
SCSI read/write requests should not be re-issued before the current
fragment of I/O completes. There are asserts in scsi-disk.c that guard
this constraint but they trigger on SPARC Linux 2.4. It turns out that
the asserts are too early in the code path and don't allow for read
requests to terminate.
Only the read assert needs to be moved but move the write assert too for
consistency.
Reported-by: Nigel Horne <njh@bandsman.co.uk>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
When migration triggers before a VQ is initialized,
base pa is 0 and last_used_index must be 0 too:
we don't have a ring to compare to.
Reported-by: Juan Quintela <quintela@redhat.com>
Tested-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
(cherry picked from commit cd92f4cc22)
Take into account secondary bus reset bit for
bus walk: devices behind a reset bus should not
respond to configuration cycles.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Trigger secondary bus reset when secondary bus reset bit
value changes from 0 to 1.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Introduce a helper function which triggers reset from a given device.
Will be used by pci bus emulation.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
and make it called via qbus_reset_all().
The qbus reset callback will be used by pci bus reset.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This patch changes the reset handling so that qdev has no knowledge of the
global system reset. Instead, a new bus/device level function is introduced
that allows all devices/buses on the bus/device to be reset using a depth
first transversal.
N.B. we have to expose the implicit system bus because we have various hacks
that result in an implicit system bus existing. Instead, we ought to have an
explicitly created system bus that we can trigger reset from. That's a topic
for a future patch though.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
There are some cases where you want to walk the busses, in particular, when
searching for a bus either by name or DeviceInfo.
Paolo suggested that we model the return values on how GCC's walkers work which
allows an actor to skip child transversal, or terminate walking with a positive
value that's returned as the qbus_walk_children's result.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Patching the rom data during load (in qemu) now
also supports i82801 (which had no rom file).
We only need a single rom file for the whole device family,
so remove the second one which is no longer needed.
Cc: Markus Armbruster <armbru@redhat.com>
Cc: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
PCI devices with different vendor or device ids sometimes share
the same rom code. Only the ids and the checksum
differs in a boot rom for such devices.
The i825xx ethernet controller family is a typical example
which is implemented in hw/eepro100.c. It uses at least
3 different device ids, so normally 3 boot roms would be needed.
By automatically patching vendor id and device id (and the checksum)
in qemu, all emulated family members can share the same boot rom.
VGA bios roms are another example with different vendor and device ids.
Only qemu's built-in default rom files will be patched.
v2:
* Patch also the vendor id (and remove the sanity check for vendor id).
v3:
* Don't patch a rom file when its name was set by the user.
Thus we avoid modifications of unknown rom data.
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Markus Armbruster <armbru@redhat.com>
Cc: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
There is no need for these type casts (as other existing
code shows). So re-write the first argument without
type cast (and remove a related TODO comment).
Cc: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
pci generic layer initialized wmask for bridge control register
according to pci spec. pcie deviates slightly from it,
so initialize it properly.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Bits 12 to 15 in bridge control register are reserver and must be
read-only zero, curent mask is 0xffff which makes them writeable. Fix
this up by using symbolic bit names for writeable bits instead of a
hardcoded constant.
Fix a comment w1mask -> w1cmask as well.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
