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| -rw-r--r-- | docs/system/deprecated.rst | 28 |
1 files changed, 13 insertions, 15 deletions
diff --git a/docs/system/deprecated.rst b/docs/system/deprecated.rst index d177609..544ece0 100644 --- a/docs/system/deprecated.rst +++ b/docs/system/deprecated.rst @@ -138,25 +138,23 @@ the backing storage specified with ``-mem-path`` can actually provide the guest RAM configured with ``-m`` and QEMU will fail to start up if RAM allocation is unsuccessful. -RISC-V ``-bios`` (since 4.1) +RISC-V ``-bios`` (since 5.1) '''''''''''''''''''''''''''' QEMU 4.1 introduced support for the -bios option in QEMU for RISC-V for the -RISC-V virt machine and sifive_u machine. - -QEMU 4.1 has no changes to the default behaviour to avoid breakages. This -default will change in a future QEMU release, so please prepare now. All users -of the virt or sifive_u machine must change their command line usage. - -QEMU 4.1 has three options, please migrate to one of these three: - 1. ``-bios none`` - This is the current default behavior if no -bios option - is included. QEMU will not automatically load any firmware. It is up +RISC-V virt machine and sifive_u machine. QEMU 4.1 had no changes to the +default behaviour to avoid breakages. + +QEMU 5.1 changes the default behaviour from ``-bios none`` to ``-bios default``. + +QEMU 5.1 has three options: + 1. ``-bios default`` - This is the current default behavior if no -bios option + is included. This option will load the default OpenSBI firmware automatically. + The firmware is included with the QEMU release and no user interaction is + required. All a user needs to do is specify the kernel they want to boot + with the -kernel option + 2. ``-bios none`` - QEMU will not automatically load any firmware. It is up to the user to load all the images they need. - 2. ``-bios default`` - In a future QEMU release this will become the default - behaviour if no -bios option is specified. This option will load the - default OpenSBI firmware automatically. The firmware is included with - the QEMU release and no user interaction is required. All a user needs - to do is specify the kernel they want to boot with the -kernel option 3. ``-bios <file>`` - Tells QEMU to load the specified file as the firmwrae. ``-tb-size`` option (since 5.0) |