Introduce and use the "unplug" callback.

This is a preparation for multi-stage hotplug handlers, whereby the bus
hotplug handler is overwritten by the machine hotplug handler. This handler
will then pass control to the bus hotplug handler. So to get this running
cleanly, we also have to make sure to go via the hotplug handler chain when
actually unplugging a device after an unplug request. Lookup the hotplug
handler and call "unplug".
Reviewed-by: NIgor Mammedov <imammedo@redhat.com>
Signed-off-by: NDavid Hildenbrand <david@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

For now, the hotplug handler is not called for devices that are
being cold plugged. The hotplug handler is setup when the machine
initialization is fully done. Only bridges that were cold plugged are
considered.

Set the hotplug handler for the root piix bus directly when realizing.
Overwrite the hotplug handler of bridges when coldplugging them.

This will now make sure that the ACPI PCI hotplug handler is also called
for cold plugged devices (also on bridges) but not for bridges that were
hotplugged (keeping the current behavior).
Reviewed-by: NIgor Mammedov <imammedo@redhat.com>
Signed-off-by: NDavid Hildenbrand <david@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

Perform the check in the pre_plug handler. In addition, we need the
capability only if the device is actually hotplugged (and not created
during machine initialization). This is a preparation for coldplugging
pci devices via that hotplug handler.
Reviewed-by: NIgor Mammedov <imammedo@redhat.com>
Signed-off-by: NDavid Hildenbrand <david@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

The callbacks are also called for cold plugged devices. Drop the "hot"
to better match the actual callback names.
Reviewed-by: NDavid Gibson <david@gibson.dropbear.id.au>
Reviewed-by: NCornelia Huck <cohuck@redhat.com>
Reviewed-by: NIgor Mammedov <imammedo@redhat.com>
Reviewed-by: Pierre Morel<pmorel@linux.ibm.com>
Signed-off-by: NDavid Hildenbrand <david@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

The callbacks are also called for cold plugged devices. Drop the "hot"
to better match the actual callback names.

While at it, also rename shpc_device_hotplug_common() to
shpc_device_plug_common().
Reviewed-by: NDavid Gibson <david@gibson.dropbear.id.au>
Reviewed-by: NIgor Mammedov <imammedo@redhat.com>
Signed-off-by: NDavid Hildenbrand <david@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

The callbacks are also called for cold plugged devices. Drop the "hot"
to better match the actual callback names.

While at it, also rename  pcie_cap_slot_hotplug_common() to
pcie_cap_slot_plug_common().
Reviewed-by: NDavid Gibson <david@gibson.dropbear.id.au>
Reviewed-by: NIgor Mammedov <imammedo@redhat.com>
Signed-off-by: NDavid Hildenbrand <david@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

They've been deprecated for two releases and nobody complained that they
are still required anymore, so it's time to remove these now.
And while we're at it, mark the other remaining old 0.x machine types
as deprecated (since they can not properly be used for live-migration
anyway).
Signed-off-by: NThomas Huth <thuth@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
Reviewed-by: NEduardo Habkost <ehabkost@redhat.com>

The only remaining AcpiRsdpDescriptor users are the ACPI utils for the
BIOS table tests.
We remove that dependency and can thus remove the structure itself.
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>
Reviewed-by: NIgor Mammedov <imammedo@redhat.com>
Reviewed-by: NAndrew Jones <drjones@redhat.com>
Signed-off-by: NIgor Mammedov <imammedo@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

Now that build_rsdp() supports building both legacy and current RSDP
tables, we can move it to a generic folder (hw/acpi) and have the i386
ACPI code reuse it in order to reduce code duplication.
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>
Reviewed-by: NIgor Mammedov <imammedo@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
Reviewed-by: NAndrew Jones <drjones@redhat.com>

We add the ability to build legacy or current RSDP tables, based on the
AcpiRsdpData revision field passed to build_rsdp().
Although arm/virt only uses RSDP v2, adding that capability to
build_rsdp will allow us to share the RSDP build code between ARM and x86.
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>
Reviewed-by: NIgor Mammedov <imammedo@redhat.com>
Reviewed-by: NAndrew Jones <drjones@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

Instead of filling a mapped and packed C structure field in random order
and being careful about endianness and sizes, build_rsdp() now uses
build_append_int_noprefix() to compose RSDP table.

This makes reviewing and maintaining code easier as this is almost
matching 1:1 the ACPI spec itself.
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>
Reviewed-by: NIgor Mammedov <imammedo@redhat.com>
Reviewed-by: NAndrew Jones <drjones@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

That will allow us to generalize the ARM build_rsdp() routine to support
both legacy RSDP (The current i386 implementation) and extended RSDP
(The ARM implementation).
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>
Reviewed-by: NIgor Mammedov <imammedo@redhat.com>
Reviewed-by: NAndrew Jones <drjones@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

AcpiRsdpDescriptor describes revision 2 RSDP table so using sizeof(*rsdp)
for checksum calculation isn't correct since we are adding extra 16 bytes.
But acpi_data_push() zeroes out table, so just by luck we are summing up
exta zeros which still yelds correct checksum.

Fix it up by explicitly stating table size instead of using
pointer arithmetics on stucture.

PS:
Extra 16 bytes are still wasted, but droping them will break migration
for machines older than 2.3 due to size mismatch, for 2.3 and older it's
not an issue since they are using resizable memory regions (a1666142)
for ACPI blobs. So keep wasting memory to avoid breaking old machines.

Fixes: 72c194f7 (i386: ACPI table generation code from seabios)
Signed-off-by: NIgor Mammedov <imammedo@redhat.com>
Reviewed-by: NSamuel Ortiz <sameo@linux.intel.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

When RSDP table was introduced (d4bec5d8), we calculated only legacy
checksum, and that was incorrect as it
 - specified rev=2 and forgot about extended checksum.
 - legacy checksum calculated on full table instead of the 1st 20 bytes

Fix it by adding extended checksum calculation and using correct
size for legacy checksum.

While at it use explicit constants to specify sub/full tables
sizes instead of relying on AcpiRsdpDescriptor size and fields offsets.
The follow up commits will convert this table to build_append_int_noprefix() API,
will use constants anyway and remove unused AcpiRsdpDescriptor structure.

Based on "[PATCH v5 05/24] hw: acpi: Implement XSDT support for  RSDP"
by Samuel Ortiz, who did it right in his impl.

Fixes: d4bec5d8 ("hw/arm/virt-acpi-build: Generate RSDP table")
Signed-off-by: NIgor Mammedov <imammedo@redhat.com>
CC: Ard Biesheuvel <ard.biesheuvel@linaro.org>
CC: Shannon Zhao <shannon.zhaosl@gmail.com>
Reviewed-by: NAndrew Jones <drjones@redhat.com>
Reviewed-by: NSamuel Ortiz <sameo@linux.intel.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

For both x86 and ARM architectures, the internal RSDP build API can
return void as the current return value is unused.
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>
Reviewed-by: NIgor Mammedov <imammedo@redhat.com>
Reviewed-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: NThomas Huth <thuth@redhat.com>
Reviewed-by: NAndrew Jones <drjones@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

We're going to have 57bits aw-bits support sooner.  It's possibly time
to remove the "x-" prefix.
Signed-off-by: NPeter Xu <peterx@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

Support DMA read/write draining should be easy for existing VT-d
emulation since the emulation itself does not have any request queue
there so we don't need to do anything to flush the un-commited queue.
What we need to do is to declare the support.

These capabilities are required to pass Windows SVVP test program.  It
is verified that when with parameters "x-aw-bits=48,caching-mode=off"
we can pass the Windows SVVP test with this patch applied.  Otherwise
we'll fail with:

        IOMMU[0] - DWD (DMA write draining) not supported
        IOMMU[0] - DWD (DMA read draining) not supported
        Segment 0 has no DMA remapping capable IOMMU units

However since these bits are not declared support for QEMU<=3.1, we'll
need a compatibility bit for it and we turn this on by default only
for QEMU>=4.0.

Please refer to VT-d spec 6.5.4 for more information.

CC: Yu Wang <wyu@redhat.com>
Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1654550Signed-off-by: NPeter Xu <peterx@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

Report more *_invalid() tracepoints to error_report_once() so that we
can detect issues even without tracing enabled.  Drop those tracepoints.
Signed-off-by: NPeter Xu <peterx@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

The iotlb.iova can be zero if failure really happened.  Dump the addr
instead.
Signed-off-by: NPeter Xu <peterx@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

Change the default speed and width for new machine types to the
fastest and widest currently supported.  This should be compatible to
the PCIe 4.0 spec.  Pre-QEMU-4.0 machine types remain at 2.5GT/s, x1
width.

Cc: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
Reviewed-by: NEric Auger <eric.auger@redhat.com>
Signed-off-by: NAlex Williamson <alex.williamson@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

Now that the downstream port will virtually negotiate itself to the
link status of the downstream device, we can remove this emulation.
It's not clear that it was every terribly useful anyway.
Tested-by: NGeoffrey McRae <geoff@hostfission.com>
Reviewed-by: NEric Auger <eric.auger@redhat.com>
Signed-off-by: NAlex Williamson <alex.williamson@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

Allow users to experimentally specify speed and width values for the
generic PCIe root port.  Defaults remain at 2.5GT/s & x1 for
compatiblity with the intent to only support changing defaults via
machine types for now.

Note for libvirt testing that pcie-root-port controllers are given
default names like "pci.7" which don't play well with using the
"-set device.$name.$prop=$value" options accessible to us via
<qemu:commandline> options.  The solution is to add an <alias> to the
pcie-root-port <controller>, for example:

    <controller type='pci' index='7' model='pcie-root-port'>
      <model name='pcie-root-port'/>
      <target chassis='7' port='0x15'/>
      <alias name='ua-gfx0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x5'/>
    </controller>

The "ua-" here is a mandatory prefix.  We can then use:

  <qemu:commandline>
    <qemu:arg value='-set'/>
    <qemu:arg value='device.ua-gfx0.x-speed=8'/>
    <qemu:arg value='-set'/>
    <qemu:arg value='device.ua-gfx0.x-width=16'/>
  </qemu:commandline>

or, without an alias, set globals such as:

  <qemu:commandline>
    <qemu:arg value='-global'/>
    <qemu:arg value='pcie-root-port.x-speed=8'/>
    <qemu:arg value='-global'/>
    <qemu:arg value='pcie-root-port.x-width=16'/>
  </qemu:commandline>

Cc: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
Tested-by: NGeoffrey McRae <geoff@hostfission.com>
Reviewed-by: NEric Auger <eric.auger@redhat.com>
Signed-off-by: NAlex Williamson <alex.williamson@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

Make use of the PCIESlot speed and width fields to update link
information beyond those configured in pcie_cap_v1_fill().  This is
only called for devices supporting a version 2 capability and
automatically skips any non-PCIESlot devices.  Only devices with
increased link values generate any visible config space differences.

Cc: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
Tested-by: NGeoffrey McRae <geoff@hostfission.com>
Signed-off-by: NAlex Williamson <alex.williamson@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

Add fields allowing the PCIe link speed and width of a PCIESlot to
be configured, with an instance_post_init callback on the root port
parent class to set defaults.  This allows child classes to set these
via properties or via their own instance_init callback, without
requiring all implementions to support arbitrary user selected values.

Cc: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
Tested-by: NGeoffrey McRae <geoff@hostfission.com>
Reviewed-by: NEric Auger <eric.auger@redhat.com>
Signed-off-by: NAlex Williamson <alex.williamson@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

Create properties to be able to define speeds and widths for PCIe
links.  The only tricky bit here is that our get and set callbacks
translate from the fixed QAPI automagic enums to those we define
in PCI code to represent the actual register segment value.

Cc: Eric Blake <eblake@redhat.com>
Tested-by: NGeoffrey McRae <geoff@hostfission.com>
Reviewed-by: NMarkus Armbruster <armbru@redhat.com>
Signed-off-by: NAlex Williamson <alex.williamson@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

The PCIe link speed and width between a downstream device and its
upstream port is negotiated on real hardware and susceptible to
dynamic changes due to signal issues and power management.  In the
emulated device case there is no real hardware link, but we still
might wish to have some consistency between endpoint and downstream
port via a virtual negotiation.  There is of course a real link for
assigned devices and this same virtual negotiation allows the
downstream port to match the endpoint, synchronizing on every read
to support underlying physical hardware dynamically adjusting the
link.

This negotiation is intentionally unidirectional for compatibility.
If the endpoint exceeds the capabilities of the downstream port or
there is no endpoint device, the downstream port reports negotiation
to its maximum speed and width, matching the previous case where
negotiation was absent.  De-tuning the endpoint to match a virtual
link doesn't seem to benefit anyone and is a condition we've thus
far reported without functional issues.

Note that PCI_EXP_LNKSTA is already ignored for migration
compatibility via pcie_cap_v1_fill().

Cc: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
Tested-by: NGeoffrey McRae <geoff@hostfission.com>
Reviewed-by: NEric Auger <eric.auger@redhat.com>
Signed-off-by: NAlex Williamson <alex.williamson@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

In preparation for reporting higher virtual link speeds and widths,
create enums and macros to help us manage them.

Cc: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
Tested-by: NGeoffrey McRae <geoff@hostfission.com>
Reviewed-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: NEric Auger <eric.auger@redhat.com>
Signed-off-by: NAlex Williamson <alex.williamson@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

When loadvm'ing a *running* snapshot qemu crashes due to an invalid
free. It's fortunately caught early by glibc heap memory corruption
protection and qemu gets killed with SIGABRT.

Steps to reproduce:

1) Create VM (e.g w/ virsh define)
2) Start the VM and take a snapshot while it's running and having a
   PCI bridge attached
3) Destroy the VM and revert the running snapshot.

This commit fixes the issue.
Signed-off-by: NMatthias Weckbecker <matthias@weckbecker.name>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

SMBIOS is just another firmware interface used by some QEMU models.
We will later introduce more firmware interfaces in this subdirectory.
Reviewed-by: NLaszlo Ersek <lersek@redhat.com>
Signed-off-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

This header only declare a single function: smbios_build_type_38_table().
We already have a header that declares such functions: "smbios_build.h".
Move the declaration and remove the header.
Reviewed-by: NCorey Minyard <cminyard@mvista.com>
Reviewed-by: NLaszlo Ersek <lersek@redhat.com>
Signed-off-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

All the consumers of "hw/smbios/ipmi.h" are located in hw/smbios/.
There is no need to have this include publicly exposed,
reduce the visibility by moving it in hw/smbios/.
Reviewed-by: NLaszlo Ersek <lersek@redhat.com>
Signed-off-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

The "hw/smbios/smbios.h" include is not used, remove it.
Reviewed-by: NLaszlo Ersek <lersek@redhat.com>
Signed-off-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

Many of the current virtio-*-pci device types actually represent
3 different types of devices:
* virtio 1.0 non-transitional devices
* virtio 1.0 transitional devices
* virtio 0.9 ("legacy device" in virtio 1.0 terminology)

That would be just an annoyance if it didn't break our device/bus
compatibility QMP interfaces.  With these multi-purpose device
types, there's no way to tell management software that
transitional devices and legacy devices require a Conventional
PCI bus.

The multi-purpose device types would also prevent us from telling
management software what's the PCI vendor/device ID for them,
because their PCI IDs change at runtime depending on the bus
where they were plugged.

This patch adds separate device types for each of those virtio
device flavors:

- virtio-*-pci: the existing multi-purpose device types
  - Configurable using `disable-legacy` and `disable-modern`
    properties
  - Legacy driver support is automatically enabled/disabled
    depending on the bus where it is plugged
  - Supports Conventional PCI and PCI Express buses
    (but Conventional PCI is incompatible with
    disable-legacy=off)
  - Changes PCI vendor/device IDs at runtime
- virtio-*-pci-transitional: virtio-1.0 device supporting legacy drivers
  - Supports Conventional PCI buses only, because
    it has a PIO BAR
- virtio-*-pci-non-transitional: modern-only
  - Supports both Conventional PCI and PCI Express buses

The existing TYPE_* macros for these types will point to an
abstract base type, so existing casts in the code will keep
working for all variants.

A simple test script (tests/acceptance/virtio_version.py) is
included, to check if the new device types are equivalent to
using the `disable-legacy` and `disable-modern` options.
Acked-by: NAndrea Bolognani <abologna@redhat.com>
Reviewed-by: NCornelia Huck <cohuck@redhat.com>
Signed-off-by: NEduardo Habkost <ehabkost@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

Introduce a helper for registering different flavours of virtio
devices.  Convert code to use the helper, but keep only the
existing generic types.  Transitional and non-transitional device
types will be added by another patch.
Acked-by: NAndrea Bolognani <abologna@redhat.com>
Reviewed-by: NCornelia Huck <cohuck@redhat.com>
Signed-off-by: NEduardo Habkost <ehabkost@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

Otherwise it won't be set up correctly and won't work after
miigration.
Signed-off-by: NCorey Minyard <cminyard@mvista.com>
Cc: Igor Mammedov <imammedo@redhat.com>
Cc: qemu-stable@nongnu.org
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

When VM boots from the latest version of linux kernel, after
hot-unpluging virtio-blk disks which are hotplugged into
pcie-root-port, the VM's dmesg log shows:

[  151.046242] pciehp 0000:00:05.0:pcie004: pending interrupts 0x0001 from Slot Status
[  151.046365] pciehp 0000:00:05.0:pcie004: Slot(0-3): Attention button pressed
[  151.046369] pciehp 0000:00:05.0:pcie004: Slot(0-3): Powering off due to button press
[  151.046420] pciehp 0000:00:05.0:pcie004: pending interrupts 0x0010 from Slot Status
[  151.046425] pciehp 0000:00:05.0:pcie004: pciehp_green_led_blink: SLOTCTRL a8 write cmd 200
[  151.046464] pciehp 0000:00:05.0:pcie004: pending interrupts 0x0010 from Slot Status
[  151.046468] pciehp 0000:00:05.0:pcie004: pciehp_set_attention_status: SLOTCTRL a8 write cmd c0
[  156.163421] pciehp 0000:00:05.0:pcie004: pciehp_get_power_status: SLOTCTRL a8 value read 2f1
[  156.163427] pciehp 0000:00:05.0:pcie004: pciehp_unconfigure_device: domain:bus:dev = 0000:06:00
[  156.198736] pciehp 0000:00:05.0:pcie004: pending interrupts 0x0010 from Slot Status
[  156.198772] pciehp 0000:00:05.0:pcie004: pciehp_power_off_slot: SLOTCTRL a8 write cmd 400
[  157.224124] pciehp 0000:00:05.0:pcie004: pending interrupts 0x0018 from Slot Status
[  157.224194] pciehp 0000:00:05.0:pcie004: pciehp_green_led_off: SLOTCTRL a8 write cmd 300
[  157.224220] pciehp 0000:00:05.0:pcie004: pciehp_check_link_active: lnk_status = 2011
[  157.224223] pciehp 0000:00:05.0:pcie004: Slot(0-3): Link Up
[  157.224233] pciehp 0000:00:05.0:pcie004: pciehp_get_power_status: SLOTCTRL a8 value read 7f1
[  157.224281] pciehp 0000:00:05.0:pcie004: pending interrupts 0x0010 from Slot Status
[  157.224285] pciehp 0000:00:05.0:pcie004: pciehp_power_on_slot: SLOTCTRL a8 write cmd 0
[  157.224300] pciehp 0000:00:05.0:pcie004: __pciehp_link_set: lnk_ctrl = 0
[  157.224336] pciehp 0000:00:05.0:pcie004: pending interrupts 0x0010 from Slot Status
[  157.224339] pciehp 0000:00:05.0:pcie004: pciehp_green_led_blink: SLOTCTRL a8 write cmd 200
[  159.739294] pci 0000:06:00.0 id reading try 50 times with interval 20 ms to get ffffffff
[  159.739315] pciehp 0000:00:05.0:pcie004: pciehp_check_link_status: lnk_status = 2011
[  159.739318] pciehp 0000:00:05.0:pcie004: Failed to check link status
[  159.739371] pciehp 0000:00:05.0:pcie004: pending interrupts 0x0010 from Slot Status
[  159.739394] pciehp 0000:00:05.0:pcie004: pciehp_power_off_slot: SLOTCTRL a8 write cmd 400
[  160.771426] pciehp 0000:00:05.0:pcie004: pending interrupts 0x0010 from Slot Status
[  160.771452] pciehp 0000:00:05.0:pcie004: pciehp_green_led_off: SLOTCTRL a8 write cmd 300
[  160.771495] pciehp 0000:00:05.0:pcie004: pending interrupts 0x0010 from Slot Status
[  160.771499] pciehp 0000:00:05.0:pcie004: pciehp_set_attention_status: SLOTCTRL a8 write cmd 40
[  160.771535] pciehp 0000:00:05.0:pcie004: pending interrupts 0x0010 from Slot Status
[  160.771539] pciehp 0000:00:05.0:pcie004: pciehp_green_led_off: SLOTCTRL a8 write cmd 300

After analyzing the log information, it seems that qemu doesn't
change the Link Status from active to inactive after hot-unplug.
This results in the abnormal log after the linux kernel commit
d331710ea78fea merged.

Furthermore, If I hotplug the same virtio-blk disk after hot-unplug,
the virtio-blk would turn on and then back off.

So this patch set the Link Status inactive after hot-unplug and
active after hot-plug.
Signed-off-by: NZheng Xiang <zhengxiang9@huawei.com>
Signed-off-by: NZheng Xiang <xiang.zheng@linaro.org>
Cc: Wang Haibin <wanghaibin.wang@huawei.com>
Cc: qemu-stable@nongnu.org
Reviewed-by: NMarcel Apfelbaum <marcel.apfelbaum@gmail.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

Trivial patches (2018-12-18)

# gpg: Signature made Tue 18 Dec 2018 14:28:41 GMT
# gpg:                using RSA key F30C38BD3F2FBE3C
# gpg: Good signature from "Laurent Vivier <lvivier@redhat.com>"
# gpg:                 aka "Laurent Vivier <laurent@vivier.eu>"
# gpg:                 aka "Laurent Vivier (Red Hat) <lvivier@redhat.com>"
# Primary key fingerprint: CD2F 75DD C8E3 A4DC 2E4F  5173 F30C 38BD 3F2F BE3C

* remotes/vivier2/tags/trivial-patches-pull-request:
  error: Remove NULL checks on error_propagate() calls
  vl: Use error_fatal to simplify obvious fatal errors (again)
  i386: hvf: drop debug printf in decode_sldtgroup
  docs/devel/build-system: fix 'softmu' typo
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

QAPI patches for 2018-12-18

# gpg: Signature made Tue 18 Dec 2018 07:20:11 GMT
# gpg:                using RSA key 3870B400EB918653
# gpg: Good signature from "Markus Armbruster <armbru@redhat.com>"
# gpg:                 aka "Markus Armbruster <armbru@pond.sub.org>"
# Primary key fingerprint: 354B C8B3 D7EB 2A6B 6867  4E5F 3870 B400 EB91 8653

* remotes/armbru/tags/pull-qapi-2018-12-18:
  qapi: fix flat union on uncovered branches conditionals
  qmp hmp: Make system_wakeup check wake-up support and run state
  qga: update guest-suspend-ram and guest-suspend-hybrid descriptions
  qmp: query-current-machine with wakeup-suspend-support
  qmp: Split ShutdownCause host-qmp into quit and system-reset
  qmp: Add reason to SHUTDOWN and RESET events
  qapi: Turn ShutdownCause into QAPI enum
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

- Replace global_qtest in some tests
- Exit boot-serial-test loop if child dies
- Sanitize verbose output in biot-tables-test

# gpg: Signature made Mon 17 Dec 2018 16:08:07 GMT
# gpg:                using RSA key 2ED9D774FE702DB5
# gpg: Good signature from "Thomas Huth <th.huth@gmx.de>"
# gpg:                 aka "Thomas Huth <thuth@redhat.com>"
# gpg:                 aka "Thomas Huth <huth@tuxfamily.org>"
# gpg:                 aka "Thomas Huth <th.huth@posteo.de>"
# Primary key fingerprint: 27B8 8847 EEE0 2501 18F3  EAB9 2ED9 D774 FE70 2DB5

* remotes/huth-gitlab/tags/pull-request-2018-12-17:
  tests/bios-tables-test: Sanitize test verbose output
  tests: acpi: remove not used ACPI_READ_GENERIC_ADDRESS macro
  tests: Exit boot-serial-test loop if child dies
  tests/pxe: Make test independent of global_qtest
  tests/prom-env: Make test independent of global_qtest
  tests/machine-none: Make test independent of global_qtest
  tests/test-filter: Make tests independent of global_qtest
  tests/boot-serial: Get rid of global_qtest variable
  tests/pvpanic: Make the pvpanic test independent of global_qtest
  tests/vmgenid: Make test independent of global_qtest
  tests/acpi-utils: Drop dependence on global_qtest
  ivshmem-test: Drop dependence on global_qtest
  tests/libqos/pci: Make PCI access functions independent of global_qtest
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

Patch created mechanically by rerunning:

  $  spatch --sp-file scripts/coccinelle/error_propagate_null.cocci \
            --macro-file scripts/cocci-macro-file.h \
            --dir . --in-place

Whitespace tidied up manually.
Signed-off-by: NMarkus Armbruster <armbru@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
Reviewed-by: NLaurent Vivier <laurent@vivier.eu>
Reviewed-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20181213173113.11211-1-armbru@redhat.com>
Signed-off-by: NLaurent Vivier <laurent@vivier.eu>