Currently creating a memory region automatically registers it for
live migration. This differs from other state (which is enumerated
in a VMStateDescription structure) and ties the live migration code
into the memory core.
Decouple the two by introducing a separate API, vmstate_register_ram(),
for registering a RAM block for migration. Currently the same
implementation is reused, but later it can be moved into a separate list,
and registrations can be moved to VMStateDescription blocks.
Signed-off-by: Avi Kivity <avi@redhat.com>
This also fixes a bug with the old version: QMP would invert device id
and vendor id. This would look ok on HMP because it was printing
"device:vendor" instead of "vendor:device".
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Returns the I/O address space. Useful for implementing
PCI-ISA bridge devices.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Avi Kivity <avi@redhat.com>
Support bridge filtering on top of the memory
API as suggested by Avi Kivity:
Create a memory region for the bridge's address space. This region is
not directly added to system_memory or its descendants. Devices under
the bridge see this region as its pci_address_space(). The region is
as large as the entire address space - it does not take into account
any windows.
For each of the three windows (pref, non-pref, vga), create an alias
with the appropriate start and size. Map the alias into the bridge's
parent's pci_address_space(), as subregions.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
eepro100 was the last user. Now pci_add_capability is powerful enough.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Nothing good can happen when we overlap capabilities. This may happen
when plugging in assigned devices or when devices models contain bugs.
Detect the overlap and report it.
Based on qemu-kvm commit by Alex Williamson.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Acked-by: Don Dutile <ddutile@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Returns the PCI address space. Useful for bridges that can obscure
part of the PCI address space.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Not used anymore.
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
There is only one function, so no need for a function pointer.
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Superceded by pci_register_bar_region(). The implementations
are folded together.
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Superceded by pci_register_bar_region().
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This lets us register BARs in the I/O address space.
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Some (hacky) devices that have a back-channel to read this
address back outside the normal configuration mechanisms, such
as VMware svga.
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Allow registering a BAR using a MemoryRegion. Once all users are converted,
pci_register_bar() and pci_register_bar_simple() will be removed.
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This is now done sloppily, via get_system_memory(). Eventually callers
will be converted to stop using that.
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Introduce pci_config_read/write_common helpers to prevent passing
accesses down the callback chain that go beyond the config space limits.
Adjust length assertions as they are no longer correct (cutting may
generate valid 3 byte accesses).
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
As pci id initialization is moved to common layer,
some initialization function can be empty.
So don't call init method if NULL.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
vender id/device id... in configuration space are read-only registers
which are commonly defined for all pci devices.
So move those initialization into common place.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Prevent a deadlock caused by leaving a map cache bucket locked by the
preceding qemu_get_ram_ptr() call.
Signed-off-By: John Baboval <john.baboval@virtualcomputer.com>
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This is similar to pci_register_bar(), but automatically registers a single
memory region spanning the entire BAR.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Introduce accessor function to know INTx levels.
It will be used later by q35.
Although piix_pci tracks the intx line levels, it can be eliminated
by this helper function.
Cc: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(slot, fn) pair is somewhat confusing because of ARI.
So use devfn for pci_find_device() instead of (slot, fn).
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This patch fixes typo in pcibus_get_dev_path().
Without this patch, the result of pcibus_get_dev_path() isn't unique.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
PCI_BRIDGE_CTL_DISCARD_STATUS (bit 10 in bridge control register)
is W1C so we should not make it writeable, otherwise the assert(!(wmask
& w1cmask)) in pci_default_write_config() is hit
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reported-by: Isaku Yamahata <yamahata@valinux.co.jp>
Tested-by: Isaku Yamahata <yamahata@valinux.co.jp>
PCIDevice::rom_file is leaked.
PCIDevice::rom_file is allocated in pci_qdev_init(), but not freed anywhere.
free it in qemu_unregister_device().
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
use qemu_malloc() instead of direct use of malloc().
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
deassert intx on device reset.
So far pci_device_reset() is used for system reset.
In that case, interrupt controller is reset at the same time so that
all irq is are deasserted.
But now pci bus reset/flr is supported, and in that case irq needs to be
disabled explicitly.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Patch a6a7005d14 generated
broken device paths. We snprintf with a length shorter
than the output, so the last character is discarded and replaced
by the null byte. Fix it up by snprintf to a buffer
which is larger by 1 byte and then memcpy the data (without
the null byte) to where we need it.
Reported-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This patch adds a field to PCIDeviceInfo to tag devices as being
not hotpluggable. Any attempt to plug-in or -out such a device
will throw an error.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
The device path used for migration is currently broken for
for all devices behind a nested bridge.
Replace this by a hierarchical list of slot/function numbers, walking
the path from root down to device. Add :00 after the domain number
so that if there are no nested bridges, this is compatible
with what we have now.
Note: as pointed out by Gleb, using openfirmware paths
might be cleaner, doing this would break compatibility though,
and the IDs used are not guest or user visible at all,
so breaking the compatibility is probably not worth it.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This patch introduce a helper function to get PCIDevice from qdev id.
This function will be used later.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Support flr: trigger device reset on flr config write.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
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>
