diff options
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/specs/virt-ctlr.txt | 26 | ||||
| -rw-r--r-- | docs/system/deprecated.rst | 17 | ||||
| -rw-r--r-- | docs/system/removed-features.rst | 8 |
3 files changed, 42 insertions, 9 deletions
diff --git a/docs/specs/virt-ctlr.txt b/docs/specs/virt-ctlr.txt new file mode 100644 index 0000000000..24d38084f7 --- /dev/null +++ b/docs/specs/virt-ctlr.txt @@ -0,0 +1,26 @@ +Virtual System Controller +========================= + +This device is a simple interface defined for the pure virtual machine with no +hardware reference implementation to allow the guest kernel to send command +to the host hypervisor. + +The specification can evolve, the current state is defined as below. + +This is a MMIO mapped device using 256 bytes. + +Two 32bit registers are defined: + +1- the features register (read-only, address 0x00) + + This register allows the device to report features supported by the + controller. + The only feature supported for the moment is power control (0x01). + +2- the command register (write-only, address 0x04) + + This register allows the kernel to send the commands to the hypervisor. + The implemented commands are part of the power control feature and + are reset (1), halt (2) and panic (3). + A basic command, no-op (0), is always present and can be used to test the + register access. This command has no effect. diff --git a/docs/system/deprecated.rst b/docs/system/deprecated.rst index 5e3a31c123..1db30f8f27 100644 --- a/docs/system/deprecated.rst +++ b/docs/system/deprecated.rst @@ -21,15 +21,6 @@ deprecated. System emulator command line arguments -------------------------------------- -``-usbdevice`` (since 2.10.0) -''''''''''''''''''''''''''''' - -The ``-usbdevice DEV`` argument is now a synonym for setting -the ``-device usb-DEV`` argument instead. The deprecated syntax -would automatically enable USB support on the machine type. -If using the new syntax, USB support must be explicitly -enabled via the ``-machine usb=on`` argument. - ``-drive file=json:{...{'driver':'file'}}`` (since 3.0) ''''''''''''''''''''''''''''''''''''''''''''''''''''''' @@ -174,6 +165,14 @@ Input parameters that take a size value should only use a size suffix the value is hexadecimal. That is, '0x20M' is deprecated, and should be written either as '32M' or as '0x2000000'. +``-spice password=string`` (since 6.0) +'''''''''''''''''''''''''''''''''''''' + +This option is insecure because the SPICE password remains visible in +the process listing. This is replaced by the new ``password-secret`` +option which lets the password be securely provided on the command +line using a ``secret`` object instance. + QEMU Machine Protocol (QMP) commands ------------------------------------ diff --git a/docs/system/removed-features.rst b/docs/system/removed-features.rst index 83148dcfda..82e7fcc517 100644 --- a/docs/system/removed-features.rst +++ b/docs/system/removed-features.rst @@ -38,6 +38,14 @@ or ``-display default,show-cursor=on`` instead. QEMU 5.0 introduced an alternative syntax to specify the size of the translation block cache, ``-accel tcg,tb-size=``. +``-usbdevice audio`` (removed in 6.0) +''''''''''''''''''''''''''''''''''''' + +This option lacked the possibility to specify an audio backend device. +Use ``-device usb-audio`` now instead (and specify a corresponding USB +host controller or ``-usb`` if necessary). + + QEMU Machine Protocol (QMP) commands ------------------------------------ |