diff options
Diffstat (limited to 'docs/specs')
| -rw-r--r-- | docs/specs/index.rst | 3 | ||||
| -rw-r--r-- | docs/specs/pci-ids.rst | 98 | ||||
| -rw-r--r-- | docs/specs/pci-ids.txt | 70 | ||||
| -rw-r--r-- | docs/specs/pci-serial.rst | 37 | ||||
| -rw-r--r-- | docs/specs/pci-serial.txt | 34 | ||||
| -rw-r--r-- | docs/specs/pci-testdev.rst | 39 | ||||
| -rw-r--r-- | docs/specs/pci-testdev.txt | 31 |
7 files changed, 177 insertions, 135 deletions
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. |