[PATCH 0/6] Document removed features from older QEMU versions

[PATCH 0/6] Document removed features from older QEMU versions

[Thomas Huth]

Before we started to gather the information about removed features
in the git repo, we collected the information in the Wiki here:

 https://wiki.qemu.org/Features/RemovedFeatures

Since it's rather confusing for the users to have two sources where to
look up the related information, let's add the features from the Wiki
into the documentation in our git repo instead (and then remove the
Wiki page once these patches here have been merged).

Thomas Huth (6):
  docs/about/removed-features: Document removed CLI options from QEMU
    v2.12
  docs/about/removed-features: Document removed CLI options from QEMU
    v3.0
  docs/about/removed-features: Document removed CLI options from QEMU
    v3.1
  docs/about/removed-features: Document removed HMP commands from QEMU
    v2.12
  docs/about/removed-features: Document removed devices from older QEMU
    versions
  docs/about/removed-features: Document removed machines from older QEMU
    versions

 docs/about/removed-features.rst | 180 +++++++++++++++++++++++++++++++-
 1 file changed, 176 insertions(+), 4 deletions(-)

-- 
2.27.0

[PATCH 1/6] docs/about/removed-features: Document removed CLI options from QEMU v2.12

[Thomas Huth]

These CLI options had been removed/replaced in QEMU v2.12. Still, some
people might want to update from older versions to the recent QEMU version,
so we should give some recommendations for the replacements in our
documentation.

Signed-off-by: Thomas Huth <thuth@redhat.com>
---
 docs/about/removed-features.rst | 37 +++++++++++++++++++++++++++++++--
 1 file changed, 35 insertions(+), 2 deletions(-)

diff --git a/docs/about/removed-features.rst b/docs/about/removed-features.rst
index 07d597847c..2b5cebfe08 100644
--- a/docs/about/removed-features.rst
+++ b/docs/about/removed-features.rst
@@ -9,8 +9,41 @@ trouble after a recent upgrade.
 System emulator command line arguments
 --------------------------------------
 
-``-net ...,name=``\ *name* (removed in 5.1)
-'''''''''''''''''''''''''''''''''''''''''''
+``-hdachs`` (removed in 2.12)
+'''''''''''''''''''''''''''''
+
+The geometry defined by ``-hdachs c,h,s,t`` should now be specified via
+``-device ide-hd,drive=dr,cyls=c,heads=h,secs=s,bios-chs-trans=t``
+(together with ``-drive if=none,id=dr,...``).
+
+``-net channel`` (removed in 2.12)
+''''''''''''''''''''''''''''''''''
+
+This option has been replaced by ``-net user,guestfwd=...``.
+
+``-net dump`` (removed in 2.12)
+'''''''''''''''''''''''''''''''
+
+``-net dump[,vlan=n][,file=filename][,len=maxlen]`` has been replaced by
+``-object filter-dump,id=id,netdev=dev[,file=filename][,maxlen=maxlen]``.
+Note that the new syntax works with netdev IDs instead of the old "vlan" hubs.
+
+``-no-kvm-pit`` (removed in 2.12)
+'''''''''''''''''''''''''''''''''
+
+There is no replacement, since this was just a dummy option that has been
+ignored.
+
+``-tdf`` (removed in 2.12)
+''''''''''''''''''''''''''
+
+There is no replacement, the ``-tdf`` option has just been ignored since the
+behaviour that could be changed by this option in qemu-kvm is now the default
+when using the KVM PIT. It still can be requested explicitly using
+``-global kvm-pit.lost_tick_policy=discard``.
+
+``-net ...,name=...`` (removed in 5.1)
+''''''''''''''''''''''''''''''''''''''
 
 The ``name`` parameter of the ``-net`` option was a synonym
 for the ``id`` parameter, which should now be used instead.
-- 
2.27.0

Re: [PATCH 1/6] docs/about/removed-features: Document removed CLI options from QEMU v2.12

[Paolo Bonzini]

On 06/08/21 17:10, Thomas Huth wrote:
> +
> +``-no-kvm-pit`` (removed in 2.12)
> +'''''''''''''''''''''''''''''''''
> +
> +There is no replacement, since this was just a dummy option that has been
> +ignored.

The same effect (plus also disabling the KVM IOAPIC) can be obtained 
with "-M kernel_irqchip=split".

> It still can be requested explicitly using
> +``-global kvm-pit.lost_tick_policy=discard``.

The right one is "delay" (it's wrong in the wiki), while discard 
corresponded to -no-kvm-pitreinjection

Paolo

Re: [PATCH 1/6] docs/about/removed-features: Document removed CLI options from QEMU v2.12

[Paolo Bonzini]

On 06/08/21 17:10, Thomas Huth wrote:
> +
> +``-no-kvm-pit`` (removed in 2.12)
> +'''''''''''''''''''''''''''''''''
> +
> +There is no replacement, since this was just a dummy option that has been
> +ignored.

The same effect (plus also disabling the KVM IOAPIC) can be obtained 
with "-machine kernel_irqchip=split".

> It still can be requested explicitly using
> +``-global kvm-pit.lost_tick_policy=discard``.

The right one is "delay" (it's wrong in the wiki), while discard 
corresponded to -no-kvm-pit-reinjection

Paolo

[PATCH 2/6] docs/about/removed-features: Document removed CLI options from QEMU v3.0

[Thomas Huth]

These CLI options had been removed/replaced in QEMU v3.0. Still, some
people might want to update from older versions to the recent QEMU version,
so we should give some recommendations for the replacements in our
documentation.

Signed-off-by: Thomas Huth <thuth@redhat.com>
---
 docs/about/removed-features.rst | 35 +++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/docs/about/removed-features.rst b/docs/about/removed-features.rst
index 2b5cebfe08..c8fa0faadd 100644
--- a/docs/about/removed-features.rst
+++ b/docs/about/removed-features.rst
@@ -42,6 +42,41 @@ behaviour that could be changed by this option in qemu-kvm is now the default
 when using the KVM PIT. It still can be requested explicitly using
 ``-global kvm-pit.lost_tick_policy=discard``.
 
+``-drive secs=s``, ``-drive heads=h`` & ``-drive cyls=c`` (removed in 3.0)
+''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
+
+The drive geometry should now be specified via
+``-device ...,drive=dr,cyls=c,heads=h,secs=s`` (together with
+``-drive if=none,id=dr,...``).
+
+``-drive serial=``, ``-drive trans=`` & ``-drive addr=`` (removed in 3.0)
+'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
+
+Use ``-device ...,drive=dr,serial=r,bios-chs-trans=t,addr=a`` instead
+(together with ``-drive if=none,id=dr,...``).
+
+``-net ...,vlan=x`` (removed in 3.0)
+''''''''''''''''''''''''''''''''''''
+
+The term "vlan" was very confusing for most users in this context (it's about
+specifying a hub ID, not about IEEE 802.1Q or something similar), so this
+has been removed. To connect one NIC frontend with a network backend, either
+use ``-nic ...`` (e.g. for on-board NICs) or use ``-netdev ...,id=n`` together
+with ``-device ...,netdev=n`` (for full control over pluggable NICs). To
+connect multiple NICs or network backends via a hub device (which is what
+vlan did), use ``-nic hubport,hubid=x,...`` or
+``-netdev hubport,id=n,hubid=x,...`` (with ``-device ...,netdev=n``) instead.
+
+``-no-kvm-irqchip`` (removed in 3.0)
+''''''''''''''''''''''''''''''''''''
+
+Use ``-machine kernel_irqchip=off`` instead.
+
+``-no-kvm-pit-reinjection`` (removed in 3.0)
+''''''''''''''''''''''''''''''''''''''''''''
+
+Use ``-global kvm-pit.lost_tick_policy=discard`` instead.
+
 ``-net ...,name=...`` (removed in 5.1)
 ''''''''''''''''''''''''''''''''''''''
 
-- 
2.27.0

[PATCH 3/6] docs/about/removed-features: Document removed CLI options from QEMU v3.1

[Thomas Huth]

These CLI options had been removed/replaced in QEMU v3.1. Still, some
people might want to update from older versions to the recent QEMU version,
so we should give some recommendations for the replacements in our
documentation.

Signed-off-by: Thomas Huth <thuth@redhat.com>
---
 docs/about/removed-features.rst | 66 +++++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)

diff --git a/docs/about/removed-features.rst b/docs/about/removed-features.rst
index c8fa0faadd..af4f286f73 100644
--- a/docs/about/removed-features.rst
+++ b/docs/about/removed-features.rst
@@ -77,6 +77,72 @@ Use ``-machine kernel_irqchip=off`` instead.
 
 Use ``-global kvm-pit.lost_tick_policy=discard`` instead.
 
+``-balloon`` (removed in 3.1)
+'''''''''''''''''''''''''''''
+
+The ``-balloon option`` has been replaced by ``-device virtio-balloon``.
+
+``-bootp`` (removed in 3.1)
+'''''''''''''''''''''''''''
+
+The ``-bootp /some/file`` argument is replaced by either
+``-netdev user,id=x,bootp=/some/file`` (for pluggable NICs, accompanied with
+``-device ...,netdev=x``), or ``-nic user,bootp=/some/file`` (for on-board NICs).
+The new syntax allows different settings to be provided per NIC.
+
+``-redir`` (removed in 3.1)
+'''''''''''''''''''''''''''
+
+The ``-redir [tcp|udp]:hostport:[guestaddr]:guestport`` option is replaced
+by either ``-netdev
+user,id=x,hostfwd=[tcp|udp]:[hostaddr]:hostport-[guestaddr]:guestport``
+(for pluggable NICs, accompanied with ``-device ...,netdev=x``) or by the option
+``-nic user,hostfwd=[tcp|udp]:[hostaddr]:hostport-[guestaddr]:guestport``
+(for on-board NICs). The new syntax allows different settings to be provided
+per NIC.
+
+``-smb`` (removed in 3.1)
+'''''''''''''''''''''''''
+
+The ``-smb /some/dir`` argument is replaced by either
+``-netdev user,id=x,smb=/some/dir`` (for pluggable NICs, accompanied with
+``-device ...,netdev=x``), or ``-nic user,smb=/some/dir`` (for on-board NICs).
+The new syntax allows different settings to be provided per NIC.
+
+``-tftp`` (removed in 3.1)
+''''''''''''''''''''''''''
+
+The ``-tftp /some/dir`` argument is replaced by either
+``-netdev user,id=x,tftp=/some/dir`` (for pluggable NICs, accompanied with
+``-device ...,netdev=x``), or ``-nic user,tftp=/some/dir`` (for embedded NICs).
+The new syntax allows different settings to be provided per NIC.
+
+``-localtime`` (removed in 3.1)
+'''''''''''''''''''''''''''''''
+
+Replaced by ``-rtc base=localtime``.
+
+``-nodefconfig`` (removed in 3.1)
+'''''''''''''''''''''''''''''''''
+
+Use ``-no-user-config`` instead.
+
+``-rtc-td-hack`` (removed in 3.1)
+'''''''''''''''''''''''''''''''''
+
+Use ``-rtc driftfix=slew`` instead.
+
+``-startdate`` (removed in 3.1)
+'''''''''''''''''''''''''''''''
+
+Replaced by ``-rtc base=date``.
+
+``-vnc ...,tls=...``, ``-vnc ...,x509=...`` & ``-vnc ...,x509verify=...``
+'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
+
+The "tls-creds" option should be used instead to point to a "tls-creds-x509"
+object created using "-object".
+
 ``-net ...,name=...`` (removed in 5.1)
 ''''''''''''''''''''''''''''''''''''''
 
-- 
2.27.0

Re: [PATCH 3/6] docs/about/removed-features: Document removed CLI options from QEMU v3.1

[Paolo Bonzini]

On 06/08/21 17:10, Thomas Huth wrote:
> +``-balloon`` (removed in 3.1)
> +'''''''''''''''''''''''''''''
> +
> +The ``-balloon option`` has been replaced by ``-device virtio-balloon``.

Maybe the ``-balloon virtio`` option?  While ``-balloon none`` was a 
no-op and had no replacement.

Paolo

[PATCH 4/6] docs/about/removed-features: Document removed HMP commands from QEMU v2.12

[Thomas Huth]

These HMP commands had been removed/replaced in QEMU v2.12. Still, some
people might want to update from older versions to the recent QEMU version,
so we should give some recommendations for the replacements in our
documentation.

Signed-off-by: Thomas Huth <thuth@redhat.com>
---
 docs/about/removed-features.rst | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/docs/about/removed-features.rst b/docs/about/removed-features.rst
index af4f286f73..568a2c725b 100644
--- a/docs/about/removed-features.rst
+++ b/docs/about/removed-features.rst
@@ -353,6 +353,17 @@ Specify the properties for the object as top-level arguments instead.
 Human Monitor Protocol (HMP) commands
 -------------------------------------
 
+``usb_add`` and ``usb_remove`` (removed in 2.12)
+''''''''''''''''''''''''''''''''''''''''''''''''
+
+Replaced by ``device_add`` and ``device_del`` (use ``device_add help`` for a
+list of available devices).
+
+``host_net_add`` and ``host_net_remove`` (removed in 2.12)
+''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
+
+Replaced by ``netdev_add`` and ``netdev_del``.
+
 The ``hub_id`` parameter of ``hostfwd_add`` / ``hostfwd_remove`` (removed in 5.0)
 '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
 
-- 
2.27.0

[PATCH 5/6] docs/about/removed-features: Document removed devices from older QEMU versions

[Thomas Huth]

These devices had been removed/replaced in QEMU v2.12 and v4.0.

Signed-off-by: Thomas Huth <thuth@redhat.com>
---
 docs/about/removed-features.rst | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/docs/about/removed-features.rst b/docs/about/removed-features.rst
index 568a2c725b..ffb82c4a99 100644
--- a/docs/about/removed-features.rst
+++ b/docs/about/removed-features.rst
@@ -510,6 +510,17 @@ running the old binaries, you can use older versions of QEMU.
 System emulator devices
 -----------------------
 
+``spapr-pci-vfio-host-bridge`` (removed in 2.12)
+'''''''''''''''''''''''''''''''''''''''''''''''''
+
+The ``spapr-pci-vfio-host-bridge`` device type has been replaced by the
+``spapr-pci-host-bridge`` device type.
+
+``ivshmem`` (removed in 4.0)
+''''''''''''''''''''''''''''
+
+Replaced by either the ``ivshmem-plain`` or ``ivshmem-doorbell``.
+
 ``ide-drive`` (removed in 6.0)
 ''''''''''''''''''''''''''''''
 
-- 
2.27.0

[PATCH 6/6] docs/about/removed-features: Document removed machines from older QEMU versions

[Thomas Huth]

These machines had been removed in the QEMU v2.6 up to 4.0 time frame.

Signed-off-by: Thomas Huth <thuth@redhat.com>
---
 docs/about/removed-features.rst | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/docs/about/removed-features.rst b/docs/about/removed-features.rst
index ffb82c4a99..b1d394d207 100644
--- a/docs/about/removed-features.rst
+++ b/docs/about/removed-features.rst
@@ -470,6 +470,22 @@ Removed without replacement.
 System emulator machines
 ------------------------
 
+``s390-virtio`` (removed in 2.6)
+''''''''''''''''''''''''''''''''
+
+Use the ``s390-ccw-virtio`` machine instead.
+
+The m68k ``dummy`` machine (removed in 2.9)
+'''''''''''''''''''''''''''''''''''''''''''
+
+Use the ``none`` machine with the ``loader`` device instead.
+
+``xlnx-ep108`` (removed in 3.0)
+'''''''''''''''''''''''''''''''
+
+The EP108 was an early access development board that is no longer used.
+Use the ``xlnx-zcu102`` machine instead.
+
 ``spike_v1.9.1`` and ``spike_v1.10`` (removed in 5.1)
 '''''''''''''''''''''''''''''''''''''''''''''''''''''
 
@@ -488,8 +504,8 @@ mips ``fulong2e`` machine alias (removed in 6.0)
 
 This machine has been renamed ``fuloong2e``.
 
-``pc-1.0``, ``pc-1.1``, ``pc-1.2`` and ``pc-1.3`` (removed in 6.0)
-''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
+``pc-0.10`` up to ``pc-1.3`` (removed in 4.0 up to 6.0)
+'''''''''''''''''''''''''''''''''''''''''''''''''''''''
 
 These machine types were very old and likely could not be used for live
 migration from old QEMU versions anymore. Use a newer machine type instead.
-- 
2.27.0