diff options
| author | Daniel P. Berrange <berrange@redhat.com> | 2017-07-25 15:10:41 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2017-08-01 17:27:33 +0200 |
| commit | 8bfce83a3b50d45b7107a50a6cd61d5304a925a2 (patch) | |
| tree | f8d9c26c1e0c7f16cc86369ce906960cb87f38ea | |
| parent | 393c13b940be8f2e5b126cd9f442c12e7ecb4cac (diff) | |
| download | qemu-8bfce83a3b50d45b7107a50a6cd61d5304a925a2.tar.gz | |
qemu-options: document existance of versioned machine types
The -machine docs did not explain what the versioned machine
types are for, nor that they'll be maintained across
releases.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Message-Id: <20170725141041.1195-1-berrange@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| -rw-r--r-- | qemu-options.hx | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/qemu-options.hx b/qemu-options.hx index 746b5fa75d..9f6e2adfff 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -49,7 +49,20 @@ STEXI @item -machine [type=]@var{name}[,prop=@var{value}[,...]] @findex -machine Select the emulated machine by @var{name}. Use @code{-machine help} to list -available machines. Supported machine properties are: +available machines. + +For architectures which aim to support live migration compatibility +across releases, each release will introduce a new versioned machine +type. For example, the 2.8.0 release introduced machine types +``pc-i440fx-2.8'' and ``pc-q35-2.8'' for the x86_64/i686 architectures. + +To allow live migration of guests from QEMU version 2.8.0, to QEMU +version 2.9.0, the 2.9.0 version must support the ``pc-i440fx-2.8'' +and ``pc-q35-2.8'' machines too. To allow users live migrating VMs +to skip multiple intermediate releases when upgrading, new releases +of QEMU will support machine types from many previous versions. + +Supported machine properties are: @table @option @item accel=@var{accels1}[:@var{accels2}[:...]] This is used to enable an accelerator. Depending on the target architecture, |