diff options
| author | Alistair Francis <alistair.francis@wdc.com> | 2019-07-16 11:47:25 -0700 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@sifive.com> | 2019-07-18 14:18:45 -0700 |
| commit | fdd1bda4b47cfbec61d0e63a516c614feea0b00b (patch) | |
| tree | 267680833fb22c20a1fe9fe02a3a62c9c613ed3a /qemu-deprecated.texi | |
| parent | 91f3a2f0ce59cb621630bd224f634955222fc3e0 (diff) | |
hw/riscv: Load OpenSBI as the default firmware
If the user hasn't specified a firmware to load (with -bios) or
specified no bios (with -bios none) then load OpenSBI by default. This
allows users to boot a RISC-V kernel with just -kernel.
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
Diffstat (limited to 'qemu-deprecated.texi')
| -rw-r--r-- | qemu-deprecated.texi | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/qemu-deprecated.texi b/qemu-deprecated.texi index c90b08d553..fff07bb2a3 100644 --- a/qemu-deprecated.texi +++ b/qemu-deprecated.texi @@ -121,6 +121,26 @@ the backing storage specified with @option{-mem-path} can actually provide the guest RAM configured with @option{-m} and QEMU will fail to start up if RAM allocation is unsuccessful. +@subsection RISC-V -bios (since 4.1) + +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 + 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. + @section QEMU Machine Protocol (QMP) commands @subsection block-dirty-bitmap-add "autoload" parameter (since 2.12.0) |