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-rw-r--r--.mailmap1
-rw-r--r--MAINTAINERS12
-rw-r--r--block/export/vhost-user-blk-server.c24
-rw-r--r--docs/devel/acpi-bits.rst2
-rw-r--r--docs/interop/vhost-user.rst60
-rw-r--r--docs/pcie_sriov.txt5
-rw-r--r--docs/specs/index.rst3
-rw-r--r--docs/specs/pci-ids.rst98
-rw-r--r--docs/specs/pci-ids.txt70
-rw-r--r--docs/specs/pci-serial.rst37
-rw-r--r--docs/specs/pci-serial.txt34
-rw-r--r--docs/specs/pci-testdev.rst39
-rw-r--r--docs/specs/pci-testdev.txt31
-rw-r--r--hw/acpi/cxl.c11
-rw-r--r--hw/acpi/pcihp.c10
-rw-r--r--hw/char/serial-pci-multi.c2
-rw-r--r--hw/char/serial-pci.c2
-rw-r--r--hw/cxl/cxl-host.c4
-rw-r--r--hw/i386/acpi-build.c12
-rw-r--r--hw/i386/amd_iommu.c74
-rw-r--r--hw/i386/amd_iommu.h9
-rw-r--r--hw/i386/intel_iommu.c9
-rw-r--r--hw/i386/intel_iommu_internal.h6
-rw-r--r--hw/i386/pc.c1
-rw-r--r--hw/i386/pc_piix.c1
-rw-r--r--hw/mem/pc-dimm.c7
-rw-r--r--hw/pci-bridge/pci_expander_bridge.c61
-rw-r--r--hw/pci/pci.c15
-rw-r--r--hw/s390x/virtio-ccw.c1
-rw-r--r--hw/sparc64/sun4u.c7
-rw-r--r--hw/virtio/vhost-user-i2c.c16
-rw-r--r--hw/virtio/vhost.c14
-rw-r--r--hw/virtio/virtio-balloon.c33
-rw-r--r--hw/virtio/virtio-mmio.c1
-rw-r--r--hw/virtio/virtio-pci.c1
-rw-r--r--hw/virtio/virtio.c2
-rw-r--r--hw/xen/xen_pt.c7
-rw-r--r--include/hw/boards.h2
-rw-r--r--include/hw/cxl/cxl.h4
-rw-r--r--include/hw/i386/pc.h3
-rw-r--r--include/hw/pci/pci.h3
-rw-r--r--include/hw/pci/pci_bridge.h28
-rw-r--r--include/hw/virtio/virtio.h1
-rw-r--r--meson_options.txt2
-rw-r--r--net/vhost-vdpa.c3
-rw-r--r--scripts/meson-buildoptions.sh2
-rw-r--r--subprojects/libvhost-user/libvhost-user.c10
-rw-r--r--subprojects/libvhost-user/libvhost-user.h2
48 files changed, 457 insertions, 325 deletions
diff --git a/.mailmap b/.mailmap
index 7677047950..bbe6d3fd69 100644
--- a/.mailmap
+++ b/.mailmap
@@ -54,6 +54,7 @@ Aleksandar Markovic <aleksandar.qemu.devel@gmail.com> <amarkovic@wavecomp.com>
Aleksandar Rikalo <aleksandar.rikalo@syrmia.com> <arikalo@wavecomp.com>
Aleksandar Rikalo <aleksandar.rikalo@syrmia.com> <aleksandar.rikalo@rt-rk.com>
Alexander Graf <agraf@csgraf.de> <agraf@suse.de>
+Ani Sinha <anisinha@redhat.com> <ani@anisinha.ca>
Anthony Liguori <anthony@codemonkey.ws> Anthony Liguori <aliguori@us.ibm.com>
Christian Borntraeger <borntraeger@linux.ibm.com> <borntraeger@de.ibm.com>
Damien Hedde <damien.hedde@dahe.fr> <damien.hedde@greensocs.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index 24154f5721..fc225e66df 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1895,7 +1895,7 @@ F: hw/pci/pcie_doe.c
ACPI/SMBIOS
M: Michael S. Tsirkin <mst@redhat.com>
M: Igor Mammedov <imammedo@redhat.com>
-R: Ani Sinha <ani@anisinha.ca>
+R: Ani Sinha <anisinha@redhat.com>
S: Supported
F: include/hw/acpi/*
F: include/hw/firmware/smbios.h
@@ -1932,7 +1932,7 @@ F: hw/acpi/viot.c
F: hw/acpi/viot.h
ACPI/AVOCADO/BIOSBITS
-M: Ani Sinha <ani@anisinha.ca>
+M: Ani Sinha <anisinha@redhat.com>
M: Michael S. Tsirkin <mst@redhat.com>
S: Supported
F: tests/avocado/acpi-bits/*
@@ -2076,6 +2076,10 @@ F: backends/vhost-user.c
F: include/sysemu/vhost-user-backend.h
F: subprojects/libvhost-user/
+vhost-shadow-virtqueue
+R: Eugenio PĂ©rez <eperezma@redhat.com>
+F: hw/virtio/vhost-shadow-virtqueue.*
+
virtio
M: Michael S. Tsirkin <mst@redhat.com>
S: Supported
@@ -3368,6 +3372,10 @@ F: hw/i386/intel_iommu.c
F: hw/i386/intel_iommu_internal.h
F: include/hw/i386/intel_iommu.h
+AMD-Vi Emulation
+S: Orphan
+F: hw/i386/amd_iommu.?
+
OpenSBI Firmware
M: Bin Meng <bmeng.cn@gmail.com>
S: Supported
diff --git a/block/export/vhost-user-blk-server.c b/block/export/vhost-user-blk-server.c
index 3409d9e02e..e56b92f2e2 100644
--- a/block/export/vhost-user-blk-server.c
+++ b/block/export/vhost-user-blk-server.c
@@ -10,6 +10,7 @@
* later. See the COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
+#include "qemu/error-report.h"
#include "block/block.h"
#include "subprojects/libvhost-user/libvhost-user.h" /* only for the type definitions */
#include "standard-headers/linux/virtio_blk.h"
@@ -251,6 +252,27 @@ static void vu_blk_exp_request_shutdown(BlockExport *exp)
vhost_user_server_stop(&vexp->vu_server);
}
+static void vu_blk_exp_resize(void *opaque)
+{
+ VuBlkExport *vexp = opaque;
+ BlockDriverState *bs = blk_bs(vexp->handler.blk);
+ int64_t new_size = bdrv_getlength(bs);
+
+ if (new_size < 0) {
+ error_printf("Failed to get length of block node '%s'",
+ bdrv_get_node_name(bs));
+ return;
+ }
+
+ vexp->blkcfg.capacity = cpu_to_le64(new_size >> VIRTIO_BLK_SECTOR_BITS);
+
+ vu_config_change_msg(&vexp->vu_server.vu_dev);
+}
+
+static const BlockDevOps vu_blk_dev_ops = {
+ .resize_cb = vu_blk_exp_resize,
+};
+
static int vu_blk_exp_create(BlockExport *exp, BlockExportOptions *opts,
Error **errp)
{
@@ -292,6 +314,8 @@ static int vu_blk_exp_create(BlockExport *exp, BlockExportOptions *opts,
blk_add_aio_context_notifier(exp->blk, blk_aio_attached, blk_aio_detach,
vexp);
+ blk_set_dev_ops(exp->blk, &vu_blk_dev_ops, vexp);
+
if (!vhost_user_server_start(&vexp->vu_server, vu_opts->addr, exp->ctx,
num_queues, &vu_blk_iface, errp)) {
blk_remove_aio_context_notifier(exp->blk, blk_aio_attached,
diff --git a/docs/devel/acpi-bits.rst b/docs/devel/acpi-bits.rst
index 9eb4b9e666..22e2580200 100644
--- a/docs/devel/acpi-bits.rst
+++ b/docs/devel/acpi-bits.rst
@@ -135,7 +135,7 @@ Under ``tests/avocado/`` as the root we have:
(c) They need not be loaded by avocado framework when running tests.
-Author: Ani Sinha <ani@anisinha.ca>
+Author: Ani Sinha <anisinha@redhat.com>
References:
-----------
diff --git a/docs/interop/vhost-user.rst b/docs/interop/vhost-user.rst
index 8a5924ea75..5a070adbc1 100644
--- a/docs/interop/vhost-user.rst
+++ b/docs/interop/vhost-user.rst
@@ -130,18 +130,8 @@ A vring address description
Note that a ring address is an IOVA if ``VIRTIO_F_IOMMU_PLATFORM`` has
been negotiated. Otherwise it is a user address.
-Memory regions description
-^^^^^^^^^^^^^^^^^^^^^^^^^^
-
-+-------------+---------+---------+-----+---------+
-| num regions | padding | region0 | ... | region7 |
-+-------------+---------+---------+-----+---------+
-
-:num regions: a 32-bit number of regions
-
-:padding: 32-bit
-
-A region is:
+Memory region description
+^^^^^^^^^^^^^^^^^^^^^^^^^
+---------------+------+--------------+-------------+
| guest address | size | user address | mmap offset |
@@ -155,22 +145,49 @@ A region is:
:mmap offset: 64-bit offset where region starts in the mapped memory
+When the ``VHOST_USER_PROTOCOL_F_XEN_MMAP`` protocol feature has been
+successfully negotiated, the memory region description contains two extra
+fields at the end.
+
++---------------+------+--------------+-------------+----------------+-------+
+| guest address | size | user address | mmap offset | xen mmap flags | domid |
++---------------+------+--------------+-------------+----------------+-------+
+
+:xen mmap flags: 32-bit bit field
+
+- Bit 0 is set for Xen foreign memory mapping.
+- Bit 1 is set for Xen grant memory mapping.
+- Bit 8 is set if the memory region can not be mapped in advance, and memory
+ areas within this region must be mapped / unmapped only when required by the
+ back-end. The back-end shouldn't try to map the entire region at once, as the
+ front-end may not allow it. The back-end should rather map only the required
+ amount of memory at once and unmap it after it is used.
+
+:domid: a 32-bit Xen hypervisor specific domain id.
+
Single memory region description
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-+---------+---------------+------+--------------+-------------+
-| padding | guest address | size | user address | mmap offset |
-+---------+---------------+------+--------------+-------------+
++---------+--------+
+| padding | region |
++---------+--------+
:padding: 64-bit
-:guest address: a 64-bit guest address of the region
+A region is represented by Memory region description.
-:size: a 64-bit size
+Multiple Memory regions description
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-:user address: a 64-bit user address
++-------------+---------+---------+-----+---------+
+| num regions | padding | region0 | ... | region7 |
++-------------+---------+---------+-----+---------+
-:mmap offset: 64-bit offset where region starts in the mapped memory
+:num regions: a 32-bit number of regions
+
+:padding: 32-bit
+
+A region is represented by Memory region description.
Log description
^^^^^^^^^^^^^^^
@@ -867,6 +884,7 @@ Protocol features
#define VHOST_USER_PROTOCOL_F_INBAND_NOTIFICATIONS 14
#define VHOST_USER_PROTOCOL_F_CONFIGURE_MEM_SLOTS 15
#define VHOST_USER_PROTOCOL_F_STATUS 16
+ #define VHOST_USER_PROTOCOL_F_XEN_MMAP 17
Front-end message types
-----------------------
@@ -952,8 +970,8 @@ Front-end message types
``VHOST_USER_SET_MEM_TABLE``
:id: 5
:equivalent ioctl: ``VHOST_SET_MEM_TABLE``
- :request payload: memory regions description
- :reply payload: (postcopy only) memory regions description
+ :request payload: multiple memory regions description
+ :reply payload: (postcopy only) multiple memory regions description
Sets the memory map regions on the back-end so it can translate the
vring addresses. In the ancillary data there is an array of file
diff --git a/docs/pcie_sriov.txt b/docs/pcie_sriov.txt
index 11158dbf88..7eff7f2703 100644
--- a/docs/pcie_sriov.txt
+++ b/docs/pcie_sriov.txt
@@ -9,10 +9,7 @@ virtual functions (VFs) for the main purpose of eliminating software
overhead in I/O from virtual machines.
QEMU now implements the basic common functionality to enable an emulated device
-to support SR/IOV. Yet no fully implemented devices exists in QEMU, but a
-proof-of-concept hack of the Intel igb can be found here:
-
-git://github.com/knuto/qemu.git sriov_patches_v5
+to support SR/IOV.
Implementation
==============
diff --git a/docs/specs/index.rst b/docs/specs/index.rst
index a58d9311cb..e58be38c41 100644
--- a/docs/specs/index.rst
+++ b/docs/specs/index.rst
@@ -8,6 +8,9 @@ guest hardware that is specific to QEMU.
.. toctree::
:maxdepth: 2
+ pci-ids
+ pci-serial
+ pci-testdev
ppc-xive
ppc-spapr-xive
ppc-spapr-numa
diff --git a/docs/specs/pci-ids.rst b/docs/specs/pci-ids.rst
new file mode 100644
index 0000000000..e302bea484
--- /dev/null
+++ b/docs/specs/pci-ids.rst
@@ -0,0 +1,98 @@
+================
+PCI IDs for QEMU
+================
+
+Red Hat, Inc. donates a part of its device ID range to QEMU, to be used for
+virtual devices. The vendor IDs are 1af4 (formerly Qumranet ID) and 1b36.
+
+Contact Gerd Hoffmann <kraxel@redhat.com> to get a device ID assigned
+for your devices.
+
+1af4 vendor ID
+--------------
+
+The 1000 -> 10ff device ID range is used as follows for virtio-pci devices.
+Note that this allocation is separate from the virtio device IDs, which are
+maintained as part of the virtio specification.
+
+1af4:1000
+ network device (legacy)
+1af4:1001
+ block device (legacy)
+1af4:1002
+ balloon device (legacy)
+1af4:1003
+ console device (legacy)
+1af4:1004
+ SCSI host bus adapter device (legacy)
+1af4:1005
+ entropy generator device (legacy)
+1af4:1009
+ 9p filesystem device (legacy)
+1af4:1012
+ vsock device (bug compatibility)
+
+1af4:1040 to 1af4:10ef
+ ID range for modern virtio devices. The PCI device
+ ID is calculated from the virtio device ID by adding the
+ 0x1040 offset. The virtio IDs are defined in the virtio
+ specification. The Linux kernel has a header file with
+ defines for all virtio IDs (``linux/virtio_ids.h``); QEMU has a
+ copy in ``include/standard-headers/``.
+
+1af4:10f0 to 1a4f:10ff
+ Available for experimental usage without registration. Must get
+ official ID when the code leaves the test lab (i.e. when seeking
+ upstream merge or shipping a distro/product) to avoid conflicts.
+
+1af4:1100
+ Used as PCI Subsystem ID for existing hardware devices emulated
+ by QEMU.
+
+1af4:1110
+ ivshmem device (shared memory, ``docs/specs/ivshmem-spec.txt``)
+
+All other device IDs are reserved.
+
+1b36 vendor ID
+--------------
+
+The 0000 -> 00ff device ID range is used as follows for QEMU-specific
+PCI devices (other than virtio):
+
+1b36:0001
+ PCI-PCI bridge
+1b36:0002
+ PCI serial port (16550A) adapter (:doc:`pci-serial`)
+1b36:0003
+ PCI Dual-port 16550A adapter (:doc:`pci-serial`)
+1b36:0004
+ PCI Quad-port 16550A adapter (:doc:`pci-serial`)
+1b36:0005
+ PCI test device (:doc:`pci-testdev`)
+1b36:0006
+ PCI Rocker Ethernet switch device
+1b36:0007
+ PCI SD Card Host Controller Interface (SDHCI)
+1b36:0008
+ PCIe host bridge
+1b36:0009
+ PCI Expander Bridge (-device pxb)
+1b36:000a
+ PCI-PCI bridge (multiseat)
+1b36:000b
+ PCIe Expander Bridge (-device pxb-pcie)
+1b36:000d
+ PCI xhci usb host adapter
+1b36:000f
+ mdpy (mdev sample device), ``linux/samples/vfio-mdev/mdpy.c``
+1b36:0010
+ PCIe NVMe device (``-device nvme``)
+1b36:0011
+ PCI PVPanic device (``-device pvpanic-pci``)
+1b36:0012
+ PCI ACPI ERST device (``-device acpi-erst``)
+
+All these devices are documented in :doc:`index`.
+
+The 0100 device ID is used for the QXL video card device.
diff --git a/docs/specs/pci-ids.txt b/docs/specs/pci-ids.txt
deleted file mode 100644
index e463c4cb3a..0000000000
--- a/docs/specs/pci-ids.txt
+++ /dev/null
@@ -1,70 +0,0 @@
-
-PCI IDs for qemu
-================
-
-Red Hat, Inc. donates a part of its device ID range to qemu, to be used for
-virtual devices. The vendor IDs are 1af4 (formerly Qumranet ID) and 1b36.
-
-Contact Gerd Hoffmann <kraxel@redhat.com> to get a device ID assigned
-for your devices.
-
-1af4 vendor ID
---------------
-
-The 1000 -> 10ff device ID range is used as follows for virtio-pci devices.
-Note that this allocation separate from the virtio device IDs, which are
-maintained as part of the virtio specification.
-
-1af4:1000 network device (legacy)
-1af4:1001 block device (legacy)
-1af4:1002 balloon device (legacy)
-1af4:1003 console device (legacy)
-1af4:1004 SCSI host bus adapter device (legacy)
-1af4:1005 entropy generator device (legacy)
-1af4:1009 9p filesystem device (legacy)
-1af4:1012 vsock device (bug compatibility)
-
-1af4:1040 Start of ID range for modern virtio devices. The PCI device
- to ID is calculated from the virtio device ID by adding the
-1af4:10ef 0x1040 offset. The virtio IDs are defined in the virtio
- specification. The Linux kernel has a header file with
- defines for all virtio IDs (linux/virtio_ids.h), qemu has a
- copy in include/standard-headers/.
-
-1af4:10f0 Available for experimental usage without registration. Must get
- to official ID when the code leaves the test lab (i.e. when seeking
-1af4:10ff upstream merge or shipping a distro/product) to avoid conflicts.
-
-1af4:1100 Used as PCI Subsystem ID for existing hardware devices emulated
- by qemu.
-
-1af4:1110 ivshmem device (shared memory, docs/specs/ivshmem-spec.txt)
-
-All other device IDs are reserved.
-
-1b36 vendor ID
---------------
-
-The 0000 -> 00ff device ID range is used as follows for QEMU-specific
-PCI devices (other than virtio):
-
-1b36:0001 PCI-PCI bridge
-1b36:0002 PCI serial port (16550A) adapter (docs/specs/pci-serial.txt)
-1b36:0003 PCI Dual-port 16550A adapter (docs/specs/pci-serial.txt)
-1b36:0004 PCI Quad-port 16550A adapter (docs/specs/pci-serial.txt)
-1b36:0005 PCI test device (docs/specs/pci-testdev.txt)
-1b36:0006 PCI Rocker Ethernet switch device
-1b36:0007 PCI SD Card Host Controller Interface (SDHCI)
-1b36:0008 PCIe host bridge
-1b36:0009 PCI Expander Bridge (-device pxb)
-1b36:000a PCI-PCI bridge (multiseat)
-1b36:000b PCIe Expander Bridge (-device pxb-pcie)
-1b36:000d PCI xhci usb host adapter
-1b36:000f mdpy (mdev sample device), linux/samples/vfio-mdev/mdpy.c
-1b36:0010 PCIe NVMe device (-device nvme)
-1b36:0011 PCI PVPanic device (-device pvpanic-pci)
-1b36:0012 PCI ACPI ERST device (-device acpi-erst)
-
-All these devices are documented in docs/specs.
-
-The 0100 device ID is used for the QXL video card device.
diff --git a/docs/specs/pci-serial.rst b/docs/specs/pci-serial.rst
new file mode 100644
index 0000000000..8d916a3669
--- /dev/null
+++ b/docs/specs/pci-serial.rst
@@ -0,0 +1,37 @@
+=======================
+QEMU PCI serial devices
+=======================
+
+QEMU implements some PCI serial devices which are simple PCI
+wrappers around one or more 16550 UARTs.
+
+There is one single-port variant and two multiport-variants. Linux
+guests work out-of-the box with all cards. There is a Windows inf file
+(``docs/qemupciserial.inf``) to set up the cards in Windows guests.
+
+
+Single-port card
+----------------
+
+Name:
+ ``pci-serial``
+PCI ID:
+ 1b36:0002
+PCI Region 0:
+ IO bar, 8 bytes long, with the 16550 UART mapped to it.
+Interrupt:
+ Wired to pin A.
+
+
+Multiport cards
+---------------
+
+Name:
+ ``pci-serial-2x``, ``pci-serial-4x``
+PCI ID:
+ 1b36:0003 (``-2x``) and 1b36:0004 (``-4x``)
+PCI Region 0:
+ IO bar, with two or four 16550 UARTs mapped after each other.
+ The first is at offset 0, the second at offset 8, and so on.
+Interrupt:
+ Wired to pin A.
diff --git a/docs/specs/pci-serial.txt b/docs/specs/pci-serial.txt
deleted file mode 100644
index 66c761f2b4..0000000000
--- a/docs/specs/pci-serial.txt
+++ /dev/null
@@ -1,34 +0,0 @@
-
-QEMU pci serial devices
-=======================
-
-There is one single-port variant and two muliport-variants. Linux
-guests out-of-the box with all cards. There is a Windows inf file
-(docs/qemupciserial.inf) to setup the single-port card in Windows
-guests.
-
-
-single-port card
-----------------
-
-Name: pci-serial
-PCI ID: 1b36:0002
-
-PCI Region 0:
- IO bar, 8 bytes long, with the 16550 uart mapped to it.
- Interrupt is wired to pin A.
-
-
-multiport cards
----------------
-
-Name: pci-serial-2x
-PCI ID: 1b36:0003
-
-Name: pci-serial-4x
-PCI ID: 1b36:0004
-
-PCI Region 0:
- IO bar, with two/four 16550 uart mapped after each other.
- The first is at offset 0, second at offset 8, ...
- Interrupt is wired to pin A.
diff --git a/docs/specs/pci-testdev.rst b/docs/specs/pci-testdev.rst
new file mode 100644
index 0000000000..4b6d36543b
--- /dev/null
+++ b/docs/specs/pci-testdev.rst
@@ -0,0 +1,39 @@
+====================
+QEMU PCI test device
+====================
+
+``pci-testdev`` is a device used for testing low level IO.
+
+The device implements up to three BARs: BAR0, BAR1 and BAR2.
+Each of BAR 0+1 can be memory or IO. Guests must detect
+BAR types and act accordingly.
+
+BAR 0+1 size is up to 4K bytes each.
+BAR 0+1 starts with the following header:
+
+.. code-block:: c
+
+ typedef struct PCITestDevHdr {
+ uint8_t test; /* write-only, starts a given test number */
+ uint8_t width_type; /*
+ * read-only, type and width of access for a given test.
+ * 1,2,4 for byte,word or long write.
+ * any other value if test not supported on this BAR
+ */
+ uint8_t pad0[2];
+ uint32_t offset; /* read-only, offset in this BAR for a given test */
+ uint32_t data; /* read-only, data to use for a given test */
+ uint32_t count; /* for debugging. number of writes detected. */
+ uint8_t name[]; /* for debugging. 0-terminated ASCII string. */
+ } PCITestDevHdr;
+
+All registers are little endian.
+
+The device is expected to always implement tests 0 to N on each BAR, and to add new
+tests with higher numbers. In this way a guest can scan test numbers until it
+detects an access type that it does not support on this BAR, then stop.
+
+BAR2 is a 64bit memory BAR, without backing storage. It is disabled
+by default and can be enabled using the ``membar=<size>`` property. This
+can be used to test whether guests handle PCI BARs of a specific
+(possibly quite large) size correctly.
diff --git a/docs/specs/pci-testdev.txt b/docs/specs/pci-testdev.txt
deleted file mode 100644
index 4280a1e73c..0000000000
--- a/docs/specs/pci-testdev.txt
+++ /dev/null
@@ -1,31 +0,0 @@
-pci-test is a device used for testing low level IO
-
-device implements up to three BARs: BAR0, BAR1 and BAR2.
-Each of BAR 0+1 can be memory or IO. Guests must detect
-BAR types and act accordingly.
-
-BAR 0+1 size is up to 4K bytes each.
-BAR 0+1 starts with the following header:
-
-typedef struct PCITestDevHdr {
- uint8_t test; <- write-only, starts a given test number
- uint8_t width_type; <- read-only, type and width of access for a given test.
- 1,2,4 for byte,word or long write.
- any other value if test not supported on this BAR
- uint8_t pad0[2];
- uint32_t offset; <- read-only, offset in this BAR for a given test
- uint32_t data; <- read-only, data to use for a given test
- uint32_t count; <- for debugging. number of writes detected.
- uint8_t name[]; <- for debugging. 0-terminated ASCII string.
-} PCITestDevHdr;
-
-All registers are little endian.
-
-device is expected to always implement tests 0 to N on each BAR, and to add new
-tests with higher numbers. In this way a guest can scan test numbers until it
-detects an access type that it does not support on this BAR, then stop.
-
-BAR2 is a 64bit memory bar, without backing storage. It is disabled
-by default and can be enabled using the membar=<size> property. This
-can be used to test whether guests handle pci bars of a specific
-(possibly quite large) size correctly.
diff --git a/hw/acpi/cxl.c b/hw/acpi/cxl.c
index 2bf8c07993..92b46bc932 100644
--- a/hw/acpi/cxl.c
+++ b/hw/acpi/cxl.c
@@ -30,9 +30,10 @@
#include "qapi/error.h"
#include "qemu/uuid.h"
-static void cedt_build_chbs(GArray *table_data, PXBDev *cxl)
+static void cedt_build_chbs(GArray *table_data, PXBCXLDev *cxl)
{
- SysBusDevice *sbd = SYS_BUS_DEVICE(cxl->cxl.cxl_host_bridge);
+ PXBDev *pxb = PXB_DEV(cxl);
+ SysBusDevice *sbd = SYS_BUS_DEVICE(cxl->cxl_host_bridge);
struct MemoryRegion *mr = sbd->mmio[0].memory;
/* Type */
@@ -45,7 +46,7 @@ static void cedt_build_chbs(GArray *table_data, PXBDev *cxl)
build_append_int_noprefix(table_data, 32, 2);
/* UID - currently equal to bus number */
- build_append_int_noprefix(table_data, cxl->bus_nr, 4);
+ build_append_int_noprefix(table_data, pxb->bus_nr, 4);
/* Version */
build_append_int_noprefix(table_data, 1, 4);
@@ -112,7 +113,7 @@ static void cedt_build_cfmws(GArray *table_data, CXLState *cxls)
/* Host Bridge List (list of UIDs - currently bus_nr) */
for (i = 0; i < fw->num_targets; i++) {
g_assert(fw->target_hbs[i]);
- build_append_int_noprefix(table_data, fw->target_hbs[i]->bus_nr, 4);
+ build_append_int_noprefix(table_data, PXB_DEV(fw->target_hbs[i])->bus_nr, 4);
}
}
}
@@ -121,7 +122,7 @@ static int cxl_foreach_pxb_hb(Object *obj, void *opaque)
{
Aml *cedt = opaque;
- if (object_dynamic_cast(obj, TYPE_PXB_CXL_DEVICE)) {
+ if (object_dynamic_cast(obj, TYPE_PXB_CXL_DEV)) {
cedt_build_chbs(cedt->buf, PXB_CXL_DEV(obj));
}
diff --git a/hw/acpi/pcihp.c b/hw/acpi/pcihp.c
index dcfb779a7a..cdd6f775a1 100644
--- a/hw/acpi/pcihp.c
+++ b/hw/acpi/pcihp.c
@@ -357,6 +357,16 @@ void acpi_pcihp_device_unplug_request_cb(HotplugHandler *hotplug_dev,
* acpi_pcihp_eject_slot() when the operation is completed.
*/
pdev->qdev.pending_deleted_event = true;
+ /* if unplug was requested before OSPM is initialized,
+ * linux kernel will clear GPE0.sts[] bits during boot, which effectively
+ * hides unplug event. And than followup qmp_device_del() calls remain
+ * blocked by above flag permanently.
+ * Unblock qmp_device_del() by setting expire limit, so user can
+ * repeat unplug request later when OSPM has been booted.
+ */
+ pdev->qdev.pending_deleted_expires_ms =
+ qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL); /* 1 msec */
+
s->acpi_pcihp_pci_status[bsel].down |= (1U << slot);
acpi_send_event(DEVICE(hotplug_dev), ACPI_PCI_HOTPLUG_STATUS);
}
diff --git a/hw/char/serial-pci-multi.c b/hw/char/serial-pci-multi.c
index f18b8dcce5..5d65c534cb 100644
--- a/hw/char/serial-pci-multi.c
+++ b/hw/char/serial-pci-multi.c
@@ -25,7 +25,7 @@
* THE SOFTWARE.
*/
-/* see docs/specs/pci-serial.txt */
+/* see docs/specs/pci-serial.rst */
#include "qemu/osdep.h"
#include "qapi/error.h"
diff --git a/hw/char/serial-pci.c b/hw/char/serial-pci.c
index 801b769aba..087da3059a 100644
--- a/hw/char/serial-pci.c
+++ b/hw/char/serial-pci.c
@@ -23,7 +23,7 @@
* THE SOFTWARE.
*/
-/* see docs/specs/pci-serial.txt */
+/* see docs/specs/pci-serial.rst */
#include "qemu/osdep.h"
#include "qapi/error.h"
diff --git a/hw/cxl/cxl-host.c b/hw/cxl/cxl-host.c
index 6e923ceeaf..034c7805b3 100644
--- a/hw/cxl/cxl-host.c
+++ b/hw/cxl/cxl-host.c
@@ -84,7 +84,7 @@ void cxl_fmws_link_targets(CXLState *cxl_state, Error **errp)
bool ambig;
o = object_resolve_path_type(fw->targets[i],
- TYPE_PXB_CXL_DEVICE,
+ TYPE_PXB_CXL_DEV,
&ambig);
if (!o) {
error_setg(errp, "Could not resolve CXLFM target %s",
@@ -141,7 +141,7 @@ static PCIDevice *cxl_cfmws_find_device(CXLFixedWindow *fw, hwaddr addr)
addr += fw->base;
rb_index = (addr / cxl_decode_ig(fw->enc_int_gran)) % fw->num_targets;
- hb = PCI_HOST_BRIDGE(fw->target_hbs[rb_index]->cxl.cxl_host_bridge);
+ hb = PCI_HOST_BRIDGE(fw->target_hbs[rb_index]->cxl_host_bridge);
if (!hb || !hb->bus || !pci_bus_is_cxl(hb->bus)) {
return NULL;
}
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index ec857a117e..512162003b 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -2395,9 +2395,11 @@ build_amd_iommu(GArray *table_data, BIOSLinker *linker, const char *oem_id,
/* IVHD length */
build_append_int_noprefix(table_data, ivhd_table_len, 2);
/* DeviceID */
- build_append_int_noprefix(table_data, s->devid, 2);
+ build_append_int_noprefix(table_data,
+ object_property_get_int(OBJECT(&s->pci), "addr",
+ &error_abort), 2);
/* Capability offset */
- build_append_int_noprefix(table_data, s->capab_offset, 2);
+ build_append_int_noprefix(table_data, s->pci.capab_offset, 2);
/* IOMMU base address */
build_append_int_noprefix(table_data, s->mmio.addr, 8);
/* PCI Segment Group */
@@ -2695,7 +2697,8 @@ void acpi_build(AcpiBuildTables *tables, MachineState *machine)
int legacy_table_size =
ROUND_UP(tables_blob->len - aml_len + legacy_aml_len,
ACPI_BUILD_ALIGN_SIZE);
- if (tables_blob->len > legacy_table_size) {
+ if ((tables_blob->len > legacy_table_size) &&
+ !pcmc->resizable_acpi_blob) {
/* Should happen only with PCI bridges and -M pc-i440fx-2.0. */
warn_report("ACPI table size %u exceeds %d bytes,"
" migration may not work",
@@ -2706,7 +2709,8 @@ void acpi_build(AcpiBuildTables *tables, MachineState *machine)
g_array_set_size(tables_blob, legacy_table_size);
} else {
/* Make sure we have a buffer in case we need to resize the tables. */
- if (tables_blob->len > ACPI_BUILD_TABLE_SIZE / 2) {
+ if ((tables_blob->len > ACPI_BUILD_TABLE_SIZE / 2) &&
+ !pcmc->resizable_acpi_blob) {
/* As of QEMU 2.1, this fires with 160 VCPUs and 255 memory slots. */
warn_report("ACPI table size %u exceeds %d bytes,"
" migration may not work",
diff --git a/hw/i386/amd_iommu.c b/hw/i386/amd_iommu.c
index bcd016f5c5..9c77304438 100644
--- a/hw/i386/amd_iommu.c
+++ b/hw/i386/amd_iommu.c
@@ -1509,23 +1509,48 @@ static void amdvi_init(AMDVIState *s)
amdvi_set_quad(s, AMDVI_MMIO_EXT_FEATURES, AMDVI_EXT_FEATURES,
0xffffffffffffffef, 0);
amdvi_set_quad(s, AMDVI_MMIO_STATUS, 0, 0x98, 0x67);
+}
+
+static void amdvi_pci_realize(PCIDevice *pdev, Error **errp)
+{
+ AMDVIPCIState *s = AMD_IOMMU_PCI(pdev);
+ int ret;
+
+ ret = pci_add_capability(pdev, AMDVI_CAPAB_ID_SEC, 0,
+ AMDVI_CAPAB_SIZE, errp);
+ if (ret < 0) {
+ return;
+ }
+ s->capab_offset = ret;
+
+ ret = pci_add_capability(pdev, PCI_CAP_ID_MSI, 0,
+ AMDVI_CAPAB_REG_SIZE, errp);
+ if (ret < 0) {
+ return;
+ }
+ ret = pci_add_capability(pdev, PCI_CAP_ID_HT, 0,
+ AMDVI_CAPAB_REG_SIZE, errp);
+ if (ret < 0) {
+ return;
+ }
+
+ if (msi_init(pdev, 0, 1, true, false, errp) < 0) {
+ return;
+ }
/* reset device ident */
- pci_config_set_vendor_id(s->pci.dev.config, PCI_VENDOR_ID_AMD);
- pci_config_set_prog_interface(s->pci.dev.config, 00);
- pci_config_set_device_id(s->pci.dev.config, s->devid);
- pci_config_set_class(s->pci.dev.config, 0x0806);
+ pci_config_set_prog_interface(pdev->config, 0);
/* reset AMDVI specific capabilities, all r/o */
- pci_set_long(s->pci.dev.config + s->capab_offset, AMDVI_CAPAB_FEATURES);
- pci_set_long(s->pci.dev.config + s->capab_offset + AMDVI_CAPAB_BAR_LOW,
- s->mmio.addr & ~(0xffff0000));
- pci_set_long(s->pci.dev.config + s->capab_offset + AMDVI_CAPAB_BAR_HIGH,
- (s->mmio.addr & ~(0xffff)) >> 16);
- pci_set_long(s->pci.dev.config + s->capab_offset + AMDVI_CAPAB_RANGE,
+ pci_set_long(pdev->config + s->capab_offset, AMDVI_CAPAB_FEATURES);
+ pci_set_long(pdev->config + s->capab_offset + AMDVI_CAPAB_BAR_LOW,
+ AMDVI_BASE_ADDR & ~(0xffff0000));
+ pci_set_long(pdev->config + s->capab_offset + AMDVI_CAPAB_BAR_HIGH,
+ (AMDVI_BASE_ADDR & ~(0xffff)) >> 16);
+ pci_set_long(pdev->config + s->capab_offset + AMDVI_CAPAB_RANGE,
0xff000000);
- pci_set_long(s->pci.dev.config + s->capab_offset + AMDVI_CAPAB_MISC, 0);
- pci_set_long(s->pci.dev.config + s->capab_offset + AMDVI_CAPAB_MISC,
+ pci_set_long(pdev->config + s->capab_offset + AMDVI_CAPAB_MISC, 0);
+ pci_set_long(pdev->config + s->capab_offset + AMDVI_CAPAB_MISC,
AMDVI_MAX_PH_ADDR | AMDVI_MAX_GVA_ADDR | AMDVI_MAX_VA_ADDR);
}
@@ -1539,7 +1564,6 @@ static void amdvi_sysbus_reset(DeviceState *dev)
static void amdvi_sysbus_realize(DeviceState *dev, Error **errp)
{
- int ret = 0;
AMDVIState *s = AMD_IOMMU_DEVICE(dev);
MachineState *ms = MACHINE(qdev_get_machine());
PCMachineState *pcms = PC_MACHINE(ms);
@@ -1553,23 +1577,6 @@ static void amdvi_sysbus_realize(DeviceState *dev, Error **errp)
if (!qdev_realize(DEVICE(&s->pci), &bus->qbus, errp)) {
return;
}
- ret = pci_add_capability(&s->pci.dev, AMDVI_CAPAB_ID_SEC, 0,
- AMDVI_CAPAB_SIZE, errp);
- if (ret < 0) {
- return;
- }
- s->capab_offset = ret;
-
- ret = pci_add_capability(&s->pci.dev, PCI_CAP_ID_MSI, 0,
- AMDVI_CAPAB_REG_SIZE, errp);
- if (ret < 0) {
- return;
- }
- ret = pci_add_capability(&s->pci.dev, PCI_CAP_ID_HT, 0,
- AMDVI_CAPAB_REG_SIZE, errp);
- if (ret < 0) {
- return;
- }
/* Pseudo address space under root PCI bus. */
x86ms->ioapic_as = amdvi_host_dma_iommu(bus, s, AMDVI_IOAPIC_SB_DEVID);
@@ -1581,8 +1588,6 @@ static void amdvi_sysbus_realize(DeviceState *dev, Error **errp)
sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->mmio);
sysbus_mmio_map(SYS_BUS_DEVICE(s), 0, AMDVI_BASE_ADDR);
pci_setup_iommu(bus, amdvi_host_dma_iommu, s);
- s->devid = object_property_get_int(OBJECT(&s->pci), "addr", &error_abort);
- msi_init(&s->pci.dev, 0, 1, true, false, errp);
amdvi_init(s);
}
@@ -1625,6 +1630,11 @@ static const TypeInfo amdvi_sysbus = {
static void amdvi_pci_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
+ PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
+
+ k->vendor_id = PCI_VENDOR_ID_AMD;
+ k->class_id = 0x0806;
+ k->realize = amdvi_pci_realize;
set_bit(DEVICE_CATEGORY_MISC, dc->categories);
dc->desc = "AMD IOMMU (AMD-Vi) DMA Remapping device";
diff --git a/hw/i386/amd_iommu.h b/hw/i386/amd_iommu.h
index 79d38a3e41..6da893ee57 100644
--- a/hw/i386/amd_iommu.h
+++ b/hw/i386/amd_iommu.h
@@ -300,27 +300,26 @@ struct irte_ga {
OBJECT_DECLARE_SIMPLE_TYPE(AMDVIState, AMD_IOMMU_DEVICE)
#define TYPE_AMD_IOMMU_PCI "AMDVI-PCI"
+OBJECT_DECLARE_SIMPLE_TYPE(AMDVIPCIState, AMD_IOMMU_PCI)
#define TYPE_AMD_IOMMU_MEMORY_REGION "amd-iommu-iommu-memory-region"
typedef struct AMDVIAddressSpace AMDVIAddressSpace;
/* functions to steal PCI config space */
-typedef struct AMDVIPCIState {
+struct AMDVIPCIState {
PCIDevice dev; /* The PCI device itself */
-} AMDVIPCIState;
+ uint32_t capab_offset; /* capability offset pointer */
+};
struct AMDVIState {
X86IOMMUState iommu; /* IOMMU bus device */
AMDVIPCIState pci; /* IOMMU PCI device */
uint32_t version;
- uint32_t capab_offset; /* capability offset pointer */
uint64_t mmio_addr;
- uint32_t devid; /* auto-assigned devid */
-
bool enabled; /* IOMMU enabled */
bool ats_enabled; /* address translation enabled */
bool cmdbuf_enabled; /* command buffer enabled */
diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index a62896759c..94d52f4205 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -64,8 +64,8 @@ struct vtd_as_key {
struct vtd_iotlb_key {
uint64_t gfn;
uint32_t pasid;
- uint32_t level;
uint16_t sid;
+ uint8_t level;
};
static void vtd_address_space_refresh_all(IntelIOMMUState *s);
@@ -221,10 +221,11 @@ static gboolean vtd_iotlb_equal(gconstpointer v1, gconstpointer v2)
static guint vtd_iotlb_hash(gconstpointer v)
{
const struct vtd_iotlb_key *key = v;
+ uint64_t hash64 = key->gfn | ((uint64_t)(key->sid) << VTD_IOTLB_SID_SHIFT) |
+ (uint64_t)(key->level - 1) << VTD_IOTLB_LVL_SHIFT |
+ (uint64_t)(key->pasid) << VTD_IOTLB_PASID_SHIFT;
- return key->gfn | ((key->sid) << VTD_IOTLB_SID_SHIFT) |
- (key->level) << VTD_IOTLB_LVL_SHIFT |
- (key->pasid) << VTD_IOTLB_PASID_SHIFT;
+ return (guint)((hash64 >> 32) ^ (hash64 & 0xffffffffU));
}
static gboolean vtd_as_equal(gconstpointer v1, gconstpointer v2)
diff --git a/hw/i386/intel_iommu_internal.h b/hw/i386/intel_iommu_internal.h
index f090e61e11..2e61eec2f5 100644
--- a/hw/i386/intel_iommu_internal.h
+++ b/hw/i386/intel_iommu_internal.h
@@ -114,9 +114,9 @@
VTD_INTERRUPT_ADDR_FIRST + 1)
/* The shift of source_id in the key of IOTLB hash table */
-#define VTD_IOTLB_SID_SHIFT 20
-#define VTD_IOTLB_LVL_SHIFT 28
-#define VTD_IOTLB_PASID_SHIFT 30
+#define VTD_IOTLB_SID_SHIFT 26
+#define VTD_IOTLB_LVL_SHIFT 42
+#define VTD_IOTLB_PASID_SHIFT 44
#define VTD_IOTLB_MAX_SIZE 1024 /* Max size of the hash table */
/* IOTLB_REG */
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 615e1d3d06..d761c8c775 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -1946,6 +1946,7 @@ static void pc_machine_class_init(ObjectClass *oc, void *data)
pcmc->acpi_data_size = 0x20000 + 0x8000;
pcmc->pvh_enabled = true;
pcmc->kvmclock_create_always = true;
+ pcmc->resizable_acpi_blob = true;
assert(!mc->get_hotplug_handler);
mc->get_hotplug_handler = pc_get_hotplug_handler;
mc->hotplug_allowed = pc_hotplug_allowed;
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index 21591dad8d..66a849d279 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -756,6 +756,7 @@ static void pc_i440fx_2_2_machine_options(MachineClass *m)
compat_props_add(m->compat_props, hw_compat_2_2, hw_compat_2_2_len);
compat_props_add(m->compat_props, pc_compat_2_2, pc_compat_2_2_len);
pcmc->rsdp_in_ram = false;
+ pcmc->resizable_acpi_blob = false;
}
DEFINE_I440FX_MACHINE(v2_2, "pc-i440fx-2.2", pc_compat_2_2_fn,
diff --git a/hw/mem/pc-dimm.c b/hw/mem/pc-dimm.c
index 50ef83215c..37f1f4ccfd 100644
--- a/hw/mem/pc-dimm.c
+++ b/hw/mem/pc-dimm.c
@@ -81,6 +81,10 @@ void pc_dimm_plug(PCDIMMDevice *dimm, MachineState *machine)
memory_device_plug(MEMORY_DEVICE(dimm), machine);
vmstate_register_ram(vmstate_mr, DEVICE(dimm));
+ /* count only "real" DIMMs, not NVDIMMs */
+ if (!object_dynamic_cast(OBJECT(dimm), TYPE_NVDIMM)) {
+ machine->device_memory->dimm_size += memory_region_size(vmstate_mr);
+ }
}
void pc_dimm_unplug(PCDIMMDevice *dimm, MachineState *machine)
@@ -90,6 +94,9 @@ void pc_dimm_unplug(PCDIMMDevice *dimm, MachineState *machine)
memory_device_unplug(MEMORY_DEVICE(dimm), machine);
vmstate_unregister_ram(vmstate_mr, DEVICE(dimm));
+ if (!object_dynamic_cast(OBJECT(dimm), TYPE_NVDIMM)) {
+ machine->device_memory->dimm_size -= memory_region_size(vmstate_mr);
+ }
}
static int pc_dimm_slot2bitmap(Object *obj, void *opaque)
diff --git a/hw/pci-bridge/pci_expander_bridge.c b/hw/pci-bridge/pci_expander_bridge.c
index ead33f0c05..613857b601 100644
--- a/hw/pci-bridge/pci_expander_bridge.c
+++ b/hw/pci-bridge/pci_expander_bridge.c
@@ -50,24 +50,8 @@ struct PXBBus {
char bus_path[8];
};
-#define TYPE_PXB_DEVICE "pxb"
-DECLARE_INSTANCE_CHECKER(PXBDev, PXB_DEV,
- TYPE_PXB_DEVICE)
-
-#define TYPE_PXB_PCIE_DEVICE "pxb-pcie"
-DECLARE_INSTANCE_CHECKER(PXBDev, PXB_PCIE_DEV,
- TYPE_PXB_PCIE_DEVICE)
-
-static PXBDev *convert_to_pxb(PCIDevice *dev)
-{
- /* A CXL PXB's parent bus is PCIe, so the normal check won't work */
- if (object_dynamic_cast(OBJECT(dev), TYPE_PXB_CXL_DEVICE)) {
- return PXB_CXL_DEV(dev);
- }
-
- return pci_bus_is_express(pci_get_bus(dev))
- ? PXB_PCIE_DEV(dev) : PXB_DEV(dev);
-}
+#define TYPE_PXB_PCIE_DEV "pxb-pcie"
+OBJECT_DECLARE_SIMPLE_TYPE(PXBPCIEDev, PXB_PCIE_DEV)
static GList *pxb_dev_list;
@@ -89,14 +73,14 @@ bool cxl_get_hb_passthrough(PCIHostState *hb)
static int pxb_bus_num(PCIBus *bus)
{
- PXBDev *pxb = convert_to_pxb(bus->parent_dev);
+ PXBDev *pxb = PXB_DEV(bus->parent_dev);
return pxb->bus_nr;
}
static uint16_t pxb_bus_numa_node(PCIBus *bus)
{
- PXBDev *pxb = convert_to_pxb(bus->parent_dev);
+ PXBDev *pxb = PXB_DEV(bus->parent_dev);
return pxb->numa_node;
}
@@ -154,7 +138,7 @@ static char *pxb_host_ofw_unit_address(const SysBusDevice *dev)
pxb_host = PCI_HOST_BRIDGE(dev);
pxb_bus = pxb_host->bus;
- pxb_dev = convert_to_pxb(pxb_bus->parent_dev);
+ pxb_dev = PXB_DEV(pxb_bus->parent_dev);
position = g_list_index(pxb_dev_list, pxb_dev);
assert(position >= 0);
@@ -212,8 +196,8 @@ static void pxb_cxl_realize(DeviceState *dev, Error **errp)
*/
void pxb_cxl_hook_up_registers(CXLState *cxl_state, PCIBus *bus, Error **errp)
{
- PXBDev *pxb = PXB_CXL_DEV(pci_bridge_get_device(bus));
- CXLHost *cxl = pxb->cxl.cxl_host_bridge;
+ PXBCXLDev *pxb = PXB_CXL_DEV(pci_bridge_get_device(bus));
+ CXLHost *cxl = pxb->cxl_host_bridge;
CXLComponentState *cxl_cstate = &cxl->cxl_cstate;
struct MemoryRegion *mr = &cxl_cstate->crb.component_registers;
hwaddr offset;
@@ -299,7 +283,7 @@ static int pxb_map_irq_fn(PCIDevice *pci_dev, int pin)
static void pxb_cxl_dev_reset(DeviceState *dev)
{
- CXLHost *cxl = PXB_CXL_DEV(dev)->cxl.cxl_host_bridge;
+ CXLHost *cxl = PXB_CXL_DEV(dev)->cxl_host_bridge;
CXLComponentState *cxl_cstate = &cxl->cxl_cstate;
PCIHostState *hb = PCI_HOST_BRIDGE(cxl);
uint32_t *reg_state = cxl_cstate->crb.cache_mem_registers;
@@ -311,7 +295,7 @@ static void pxb_cxl_dev_reset(DeviceState *dev)
* The CXL specification allows for host bridges with no HDM decoders
* if they only have a single root port.
*/
- if (!PXB_DEV(dev)->hdm_for_passthrough) {
+ if (!PXB_CXL_DEV(dev)->hdm_for_passthrough) {
dsp_count = pcie_count_ds_ports(hb->bus);
}
/* Initial reset will have 0 dsp so wait until > 0 */
@@ -337,7 +321,7 @@ static gint pxb_compare(gconstpointer a, gconstpointer b)
static void pxb_dev_realize_common(PCIDevice *dev, enum BusType type,
Error **errp)
{
- PXBDev *pxb = convert_to_pxb(dev);
+ PXBDev *pxb = PXB_DEV(dev);
DeviceState *ds, *bds = NULL;
PCIBus *bus;
const char *dev_name = NULL;
@@ -365,7 +349,7 @@ static void pxb_dev_realize_common(PCIDevice *dev, enum BusType type,
} else if (type == CXL) {
bus = pci_root_bus_new(ds, dev_name, NULL, NULL, 0, TYPE_PXB_CXL_BUS);
bus->flags |= PCI_BUS_CXL;
- PXB_CXL_DEV(dev)->cxl.cxl_host_bridge = PXB_CXL_HOST(ds);
+ PXB_CXL_DEV(dev)->cxl_host_bridge = PXB_CXL_HOST(ds);
} else {
bus = pci_root_bus_new(ds, "pxb-internal", NULL, NULL, 0, TYPE_PXB_BUS);
bds = qdev_new("pci-bridge");
@@ -418,7 +402,7 @@ static void pxb_dev_realize(PCIDevice *dev, Error **errp)
static void pxb_dev_exitfn(PCIDevice *pci_dev)
{
- PXBDev *pxb = convert_to_pxb(pci_dev);
+ PXBDev *pxb = PXB_DEV(pci_dev);
pxb_dev_list = g_list_remove(pxb_dev_list, pxb);
}
@@ -449,7 +433,7 @@ static void pxb_dev_class_init(ObjectClass *klass, void *data)
}
static const TypeInfo pxb_dev_info = {
- .name = TYPE_PXB_DEVICE,
+ .name = TYPE_PXB_DEV,
.parent = TYPE_PCI_DEVICE,
.instance_size = sizeof(PXBDev),
.class_init = pxb_dev_class_init,
@@ -481,15 +465,14 @@ static void pxb_pcie_dev_class_init(ObjectClass *klass, void *data)
k->class_id = PCI_CLASS_BRIDGE_HOST;
dc->desc = "PCI Express Expander Bridge";
- device_class_set_props(dc, pxb_dev_properties);
dc->hotpluggable = false;
set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
}
static const TypeInfo pxb_pcie_dev_info = {
- .name = TYPE_PXB_PCIE_DEVICE,
- .parent = TYPE_PCI_DEVICE,
- .instance_size = sizeof(PXBDev),
+ .name = TYPE_PXB_PCIE_DEV,
+ .parent = TYPE_PXB_DEV,
+ .instance_size = sizeof(PXBPCIEDev),
.class_init = pxb_pcie_dev_class_init,
.interfaces = (InterfaceInfo[]) {
{ INTERFACE_CONVENTIONAL_PCI_DEVICE },
@@ -510,11 +493,7 @@ static void pxb_cxl_dev_realize(PCIDevice *dev, Error **errp)
}
static Property pxb_cxl_dev_properties[] = {
- /* Note: 0 is not a legal PXB bus number. */
- DEFINE_PROP_UINT8("bus_nr", PXBDev, bus_nr, 0),
- DEFINE_PROP_UINT16("numa_node", PXBDev, numa_node, NUMA_NODE_UNASSIGNED),
- DEFINE_PROP_BOOL("bypass_iommu", PXBDev, bypass_iommu, false),
- DEFINE_PROP_BOOL("hdm_for_passthrough", PXBDev, hdm_for_passthrough, false),
+ DEFINE_PROP_BOOL("hdm_for_passthrough", PXBCXLDev, hdm_for_passthrough, false),
DEFINE_PROP_END_OF_LIST(),
};
@@ -540,9 +519,9 @@ static void pxb_cxl_dev_class_init(ObjectClass *klass, void *data)
}
static const TypeInfo pxb_cxl_dev_info = {
- .name = TYPE_PXB_CXL_DEVICE,
- .parent = TYPE_PCI_DEVICE,
- .instance_size = sizeof(PXBDev),
+ .name = TYPE_PXB_CXL_DEV,
+ .parent = TYPE_PXB_PCIE_DEV,
+ .instance_size = sizeof(PXBCXLDev),
.class_init = pxb_cxl_dev_class_init,
.interfaces =
(InterfaceInfo[]){
diff --git a/hw/pci/pci.c b/hw/pci/pci.c
index def5000e7b..8a87ccc8b0 100644
--- a/hw/pci/pci.c
+++ b/hw/pci/pci.c
@@ -1116,6 +1116,21 @@ static bool pci_bus_devfn_reserved(PCIBus *bus, int devfn)
return bus->slot_reserved_mask & (1UL << PCI_SLOT(devfn));
}
+uint32_t pci_bus_get_slot_reserved_mask(PCIBus *bus)
+{
+ return bus->slot_reserved_mask;
+}
+
+void pci_bus_set_slot_reserved_mask(PCIBus *bus, uint32_t mask)
+{
+ bus->slot_reserved_mask |= mask;
+}
+
+void pci_bus_clear_slot_reserved_mask(PCIBus *bus, uint32_t mask)
+{
+ bus->slot_reserved_mask &= ~mask;
+}
+
/* -1 for devfn means auto assign */
static PCIDevice *do_pci_register_device(PCIDevice *pci_dev,
const char *name, int devfn,
diff --git a/hw/s390x/virtio-ccw.c b/hw/s390x/virtio-ccw.c
index e33e5207ab..f44de1a8c1 100644
--- a/hw/s390x/virtio-ccw.c
+++ b/hw/s390x/virtio-ccw.c
@@ -237,6 +237,7 @@ static int virtio_ccw_set_vqs(SubchDev *sch, VqInfoBlock *info,
return -EINVAL;
}
virtio_queue_set_num(vdev, index, num);
+ virtio_init_region_cache(vdev, index);
} else if (virtio_queue_get_num(vdev, index) > num) {
/* Fail if we don't have a big enough queue. */
return -EINVAL;
diff --git a/hw/sparc64/sun4u.c b/hw/sparc64/sun4u.c
index a25e951f9d..eae7589462 100644
--- a/hw/sparc64/sun4u.c
+++ b/hw/sparc64/sun4u.c
@@ -31,7 +31,6 @@
#include "hw/irq.h"
#include "hw/pci/pci.h"
#include "hw/pci/pci_bridge.h"
-#include "hw/pci/pci_bus.h"
#include "hw/pci/pci_host.h"
#include "hw/qdev-properties.h"
#include "hw/pci-host/sabre.h"
@@ -608,9 +607,9 @@ static void sun4uv_init(MemoryRegion *address_space_mem,
/* Only in-built Simba APBs can exist on the root bus, slot 0 on busA is
reserved (leaving no slots free after on-board devices) however slots
0-3 are free on busB */
- pci_bus->slot_reserved_mask = 0xfffffffc;
- pci_busA->slot_reserved_mask = 0xfffffff1;
- pci_busB->slot_reserved_mask = 0xfffffff0;
+ pci_bus_set_slot_reserved_mask(pci_bus, 0xfffffffc);
+ pci_bus_set_slot_reserved_mask(pci_busA, 0xfffffff1);
+ pci_bus_set_slot_reserved_mask(pci_busB, 0xfffffff0);
ebus = pci_new_multifunction(PCI_DEVFN(1, 0), true, TYPE_EBUS);
qdev_prop_set_uint64(DEVICE(ebus), "console-serial-base",
diff --git a/hw/virtio/vhost-user-i2c.c b/hw/virtio/vhost-user-i2c.c
index 60eaf0d95b..4eef3f0633 100644
--- a/hw/virtio/vhost-user-i2c.c
+++ b/hw/virtio/vhost-user-i2c.c
@@ -128,6 +128,14 @@ static void vu_i2c_guest_notifier_mask(VirtIODevice *vdev, int idx, bool mask)
{
VHostUserI2C *i2c = VHOST_USER_I2C(vdev);
+ /*
+ * We don't support interrupts, return early if index is set to
+ * VIRTIO_CONFIG_IRQ_IDX.
+ */
+ if (idx == VIRTIO_CONFIG_IRQ_IDX) {
+ return;
+ }
+
vhost_virtqueue_mask(&i2c->vhost_dev, vdev, idx, mask);
}
@@ -135,6 +143,14 @@ static bool vu_i2c_guest_notifier_pending(VirtIODevice *vdev, int idx)
{
VHostUserI2C *i2c = VHOST_USER_I2C(vdev);
+ /*
+ * We don't support interrupts, return early if index is set to
+ * VIRTIO_CONFIG_IRQ_IDX.
+ */
+ if (idx == VIRTIO_CONFIG_IRQ_IDX) {
+ return false;
+ }
+
return vhost_virtqueue_pending(&i2c->vhost_dev, idx);
}
diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c
index a266396576..746d130c74 100644
--- a/hw/virtio/vhost.c
+++ b/hw/virtio/vhost.c
@@ -1291,18 +1291,6 @@ void vhost_virtqueue_stop(struct vhost_dev *dev,
0, virtio_queue_get_desc_size(vdev, idx));
}
-static void vhost_eventfd_add(MemoryListener *listener,
- MemoryRegionSection *section,
- bool match_data, uint64_t data, EventNotifier *e)
-{
-}
-
-static void vhost_eventfd_del(MemoryListener *listener,
- MemoryRegionSection *section,
- bool match_data, uint64_t data, EventNotifier *e)
-{
-}
-
static int vhost_virtqueue_set_busyloop_timeout(struct vhost_dev *dev,
int n, uint32_t timeout)
{
@@ -1457,8 +1445,6 @@ int vhost_dev_init(struct vhost_dev *hdev, void *opaque,
.log_sync = vhost_log_sync,
.log_global_start = vhost_log_global_start,
.log_global_stop = vhost_log_global_stop,
- .eventfd_add = vhost_eventfd_add,
- .eventfd_del = vhost_eventfd_del,
.priority = 10
};
diff --git a/hw/virtio/virtio-balloon.c b/hw/virtio/virtio-balloon.c
index 43092aa634..fd06fcfb3f 100644
--- a/hw/virtio/virtio-balloon.c
+++ b/hw/virtio/virtio-balloon.c
@@ -730,37 +730,14 @@ static void virtio_balloon_get_config(VirtIODevice *vdev, uint8_t *config_data)
memcpy(config_data, &config, virtio_balloon_config_size(dev));
}
-static int build_dimm_list(Object *obj, void *opaque)
-{
- GSList **list = opaque;
-
- if (object_dynamic_cast(obj, TYPE_PC_DIMM)) {
- DeviceState *dev = DEVICE(obj);
- if (dev->realized) { /* only realized DIMMs matter */
- *list = g_slist_prepend(*list, dev);
- }
- }
-
- object_child_foreach(obj, build_dimm_list, opaque);
- return 0;
-}
-
static ram_addr_t get_current_ram_size(void)
{
- GSList *list = NULL, *item;
- ram_addr_t size = current_machine->ram_size;
-
- build_dimm_list(qdev_get_machine(), &list);
- for (item = list; item; item = g_slist_next(item)) {
- Object *obj = OBJECT(item->data);
- if (!strcmp(object_get_typename(obj), TYPE_PC_DIMM)) {
- size += object_property_get_int(obj, PC_DIMM_SIZE_PROP,
- &error_abort);
- }
+ MachineState *machine = MACHINE(qdev_get_machine());
+ if (machine->device_memory) {
+ return machine->ram_size + machine->device_memory->dimm_size;
+ } else {
+ return machine->ram_size;
}
- g_slist_free(list);
-
- return size;
}
static bool virtio_balloon_page_poison_support(void *opaque)
diff --git a/hw/virtio/virtio-mmio.c b/hw/virtio/virtio-mmio.c
index 23ba625eb6..c2c6d85475 100644
--- a/hw/virtio/virtio-mmio.c
+++ b/hw/virtio/virtio-mmio.c
@@ -354,6 +354,7 @@ static void virtio_mmio_write(void *opaque, hwaddr offset, uint64_t value,
if (proxy->legacy) {
virtio_queue_update_rings(vdev, vdev->queue_sel);
} else {
+ virtio_init_region_cache(vdev, vdev->queue_sel);
proxy->vqs[vdev->queue_sel].num = value;
}
break;
diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
index 247325c193..02fb84a8fa 100644
--- a/hw/virtio/virtio-pci.c
+++ b/hw/virtio/virtio-pci.c
@@ -1554,6 +1554,7 @@ static void virtio_pci_common_write(void *opaque, hwaddr addr,
proxy->vqs[vdev->queue_sel].num = val;
virtio_queue_set_num(vdev, vdev->queue_sel,
proxy->vqs[vdev->queue_sel].num);
+ virtio_init_region_cache(vdev, vdev->queue_sel);
break;
case VIRTIO_PCI_COMMON_Q_MSIX:
vector = virtio_queue_vector(vdev, vdev->queue_sel);
diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index 98c4819fcc..272d930721 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -226,7 +226,7 @@ static void virtio_virtqueue_reset_region_cache(struct VirtQueue *vq)
}
}
-static void virtio_init_region_cache(VirtIODevice *vdev, int n)
+void virtio_init_region_cache(VirtIODevice *vdev, int n)
{
VirtQueue *vq = &vdev->vq[n];
VRingMemoryRegionCaches *old = vq->vring.caches;
diff --git a/hw/xen/xen_pt.c b/hw/xen/xen_pt.c
index 2d33d178ad..a540149639 100644
--- a/hw/xen/xen_pt.c
+++ b/hw/xen/xen_pt.c
@@ -57,7 +57,6 @@
#include <sys/ioctl.h>
#include "hw/pci/pci.h"
-#include "hw/pci/pci_bus.h"
#include "hw/qdev-properties.h"
#include "hw/qdev-properties-system.h"
#include "xen_pt.h"
@@ -951,7 +950,7 @@ void xen_igd_reserve_slot(PCIBus *pci_bus)
}
XEN_PT_LOG(0, "Reserving PCI slot 2 for IGD\n");
- pci_bus->slot_reserved_mask |= XEN_PCI_IGD_SLOT_MASK;
+ pci_bus_set_slot_reserved_mask(pci_bus, XEN_PCI_IGD_SLOT_MASK);
}
static void xen_igd_clear_slot(DeviceState *qdev, Error **errp)
@@ -971,7 +970,7 @@ static void xen_igd_clear_slot(DeviceState *qdev, Error **errp)
return;
}
- if (!(pci_bus->slot_reserved_mask & XEN_PCI_IGD_SLOT_MASK)) {
+ if (!(pci_bus_get_slot_reserved_mask(pci_bus) & XEN_PCI_IGD_SLOT_MASK)) {
xpdc->pci_qdev_realize(qdev, errp);
return;
}
@@ -982,7 +981,7 @@ static void xen_igd_clear_slot(DeviceState *qdev, Error **errp)
s->real_device.dev == XEN_PCI_IGD_DEV &&
s->real_device.func == XEN_PCI_IGD_FN &&
s->real_device.vendor_id == PCI_VENDOR_ID_INTEL) {
- pci_bus->slot_reserved_mask &= ~XEN_PCI_IGD_SLOT_MASK;
+ pci_bus_clear_slot_reserved_mask(pci_bus, XEN_PCI_IGD_SLOT_MASK);
XEN_PT_LOG(pci_dev, "Intel IGD found, using slot 2\n");
}
xpdc->pci_qdev_realize(qdev, errp);
diff --git a/include/hw/boards.h b/include/hw/boards.h
index bf5fc9e3e7..f4117fdb9a 100644
--- a/include/hw/boards.h
+++ b/include/hw/boards.h
@@ -292,10 +292,12 @@ struct MachineClass {
* @base: address in guest physical address space where the memory
* address space for memory devices starts
* @mr: address space container for memory devices
+ * @dimm_size: the sum of plugged DIMMs' sizes
*/
typedef struct DeviceMemoryState {
hwaddr base;
MemoryRegion mr;
+ uint64_t dimm_size;
} DeviceMemoryState;
/**
diff --git a/include/hw/cxl/cxl.h b/include/hw/cxl/cxl.h
index b2cffbb364..c453983e83 100644
--- a/include/hw/cxl/cxl.h
+++ b/include/hw/cxl/cxl.h
@@ -23,12 +23,12 @@
#define CXL_WINDOW_MAX 10
-typedef struct PXBDev PXBDev;
+typedef struct PXBCXLDev PXBCXLDev;
typedef struct CXLFixedWindow {
uint64_t size;
char **targets;
- PXBDev *target_hbs[8];
+ PXBCXLDev *target_hbs[8];
uint8_t num_targets;
uint8_t enc_int_ways;
uint8_t enc_int_gran;
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index eb668e9034..84935fc958 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -127,6 +127,9 @@ struct PCMachineClass {
/* create kvmclock device even when KVM PV features are not exposed */
bool kvmclock_create_always;
+
+ /* resizable acpi blob compat */
+ bool resizable_acpi_blob;
};
#define TYPE_PC_MACHINE "generic-pc-machine"
diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h
index d5a40cd058..935b4b91b4 100644
--- a/include/hw/pci/pci.h
+++ b/include/hw/pci/pci.h
@@ -287,6 +287,9 @@ void pci_bus_irqs(PCIBus *bus, pci_set_irq_fn set_irq,
void pci_bus_map_irqs(PCIBus *bus, pci_map_irq_fn map_irq);
void pci_bus_irqs_cleanup(PCIBus *bus);
int pci_bus_get_irq_level(PCIBus *bus, int irq_num);
+uint32_t pci_bus_get_slot_reserved_mask(PCIBus *bus);
+void pci_bus_set_slot_reserved_mask(PCIBus *bus, uint32_t mask);
+void pci_bus_clear_slot_reserved_mask(PCIBus *bus, uint32_t mask);
/* 0 <= pin <= 3 0 = INTA, 1 = INTB, 2 = INTC, 3 = INTD */
static inline int pci_swizzle(int slot, int pin)
{
diff --git a/include/hw/pci/pci_bridge.h b/include/hw/pci/pci_bridge.h
index 1677176b2a..01670e9e65 100644
--- a/include/hw/pci/pci_bridge.h
+++ b/include/hw/pci/pci_bridge.h
@@ -84,7 +84,7 @@ struct PCIBridge {
#define PCI_BRIDGE_DEV_PROP_SHPC "shpc"
typedef struct CXLHost CXLHost;
-struct PXBDev {
+typedef struct PXBDev {
/*< private >*/
PCIDevice parent_obj;
/*< public >*/
@@ -92,15 +92,27 @@ struct PXBDev {
uint8_t bus_nr;
uint16_t numa_node;
bool bypass_iommu;
+} PXBDev;
+
+typedef struct PXBPCIEDev {
+ /*< private >*/
+ PXBDev parent_obj;
+} PXBPCIEDev;
+
+#define TYPE_PXB_DEV "pxb"
+OBJECT_DECLARE_SIMPLE_TYPE(PXBDev, PXB_DEV)
+
+typedef struct PXBCXLDev {
+ /*< private >*/
+ PXBPCIEDev parent_obj;
+ /*< public >*/
+
bool hdm_for_passthrough;
- struct cxl_dev {
- CXLHost *cxl_host_bridge; /* Pointer to a CXLHost */
- } cxl;
-};
+ CXLHost *cxl_host_bridge; /* Pointer to a CXLHost */
+} PXBCXLDev;
-#define TYPE_PXB_CXL_DEVICE "pxb-cxl"
-DECLARE_INSTANCE_CHECKER(PXBDev, PXB_CXL_DEV,
- TYPE_PXB_CXL_DEVICE)
+#define TYPE_PXB_CXL_DEV "pxb-cxl"
+OBJECT_DECLARE_SIMPLE_TYPE(PXBCXLDev, PXB_CXL_DEV)
int pci_bridge_ssvid_init(PCIDevice *dev, uint8_t offset,
uint16_t svid, uint16_t ssid,
diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h
index f236e94ca6..f6b38f7e9c 100644
--- a/include/hw/virtio/virtio.h
+++ b/include/hw/virtio/virtio.h
@@ -309,6 +309,7 @@ int virtio_get_num_queues(VirtIODevice *vdev);
void virtio_queue_set_rings(VirtIODevice *vdev, int n, hwaddr desc,
hwaddr avail, hwaddr used);
void virtio_queue_update_rings(VirtIODevice *vdev, int n);
+void virtio_init_region_cache(VirtIODevice *vdev, int n);
void virtio_queue_set_align(VirtIODevice *vdev, int n, int align);
void virtio_queue_notify(VirtIODevice *vdev, int n);
uint16_t virtio_queue_vector(VirtIODevice *vdev, int n);
diff --git a/meson_options.txt b/meson_options.txt
index fc9447d267..2471dd02da 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -315,7 +315,7 @@ option('debug_mutex', type: 'boolean', value: false,
description: 'mutex debugging support')
option('debug_stack_usage', type: 'boolean', value: false,
description: 'measure coroutine stack usage')
-option('qom_cast_debug', type: 'boolean', value: false,
+option('qom_cast_debug', type: 'boolean', value: true,
description: 'cast debugging support')
option('gprof', type: 'boolean', value: false,
description: 'QEMU profiling with gprof',
diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c
index 99904a0da7..37cdc84562 100644
--- a/net/vhost-vdpa.c
+++ b/net/vhost-vdpa.c
@@ -104,7 +104,8 @@ static const uint64_t vdpa_svq_device_features =
/* VHOST_F_LOG_ALL is exposed by SVQ */
BIT_ULL(VHOST_F_LOG_ALL) |
BIT_ULL(VIRTIO_NET_F_RSC_EXT) |
- BIT_ULL(VIRTIO_NET_F_STANDBY);
+ BIT_ULL(VIRTIO_NET_F_STANDBY) |
+ BIT_ULL(VIRTIO_NET_F_SPEED_DUPLEX);
#define VHOST_VDPA_NET_CVQ_ASID 1
diff --git a/scripts/meson-buildoptions.sh b/scripts/meson-buildoptions.sh
index 009fab1515..d4369a3ad8 100644
--- a/scripts/meson-buildoptions.sh
+++ b/scripts/meson-buildoptions.sh
@@ -14,6 +14,7 @@ meson_options_help() {
printf "%s\n" ' use idef-parser to automatically generate TCG'
printf "%s\n" ' code for the Hexagon frontend'
printf "%s\n" ' --disable-install-blobs install provided firmware blobs'
+ printf "%s\n" ' --disable-qom-cast-debug cast debugging support'
printf "%s\n" ' --docdir=VALUE Base directory for documentation installation'
printf "%s\n" ' (can be empty) [share/doc]'
printf "%s\n" ' --enable-block-drv-whitelist-in-tools'
@@ -35,7 +36,6 @@ meson_options_help() {
printf "%s\n" ' --enable-module-upgrades try to load modules from alternate paths for'
printf "%s\n" ' upgrades'
printf "%s\n" ' --enable-profiler profiler support'
- printf "%s\n" ' --enable-qom-cast-debug cast debugging support'
printf "%s\n" ' --enable-rng-none dummy RNG, avoid using /dev/(u)random and'
printf "%s\n" ' getrandom()'
printf "%s\n" ' --enable-strip Strip targets on install'
diff --git a/subprojects/libvhost-user/libvhost-user.c b/subprojects/libvhost-user/libvhost-user.c
index 0200b78e8e..0abd898a52 100644
--- a/subprojects/libvhost-user/libvhost-user.c
+++ b/subprojects/libvhost-user/libvhost-user.c
@@ -2455,6 +2455,16 @@ void vu_queue_notify_sync(VuDev *dev, VuVirtq *vq)
_vu_queue_notify(dev, vq, true);
}
+void vu_config_change_msg(VuDev *dev)
+{
+ VhostUserMsg vmsg = {
+ .request = VHOST_USER_BACKEND_CONFIG_CHANGE_MSG,
+ .flags = VHOST_USER_VERSION,
+ };
+
+ vu_message_write(dev, dev->slave_fd, &vmsg);
+}
+
static inline void
vring_used_flags_set_bit(VuVirtq *vq, int mask)
{
diff --git a/subprojects/libvhost-user/libvhost-user.h b/subprojects/libvhost-user/libvhost-user.h
index 8c5a2719e3..49208cceaa 100644
--- a/subprojects/libvhost-user/libvhost-user.h
+++ b/subprojects/libvhost-user/libvhost-user.h
@@ -585,6 +585,8 @@ bool vu_queue_empty(VuDev *dev, VuVirtq *vq);
*/
void vu_queue_notify(VuDev *dev, VuVirtq *vq);
+void vu_config_change_msg(VuDev *dev);
+
/**
* vu_queue_notify_sync:
* @dev: a VuDev context