Add a note about using -cdrom with QEMU.

Suggested-by: Bin Meng bmeng@tinylab.org Signed-off-by: Simon Glass sjg@chromium.org ---

doc/board/emulation/qemu-x86.rst | 3 +++ 1 file changed, 3 insertions(+)

diff --git a/doc/board/emulation/qemu-x86.rst b/doc/board/emulation/qemu-x86.rst index 15f56b6bc70..c604e42990e 100644 --- a/doc/board/emulation/qemu-x86.rst +++ b/doc/board/emulation/qemu-x86.rst @@ -193,6 +193,9 @@ Linux is selected from grub, e.g. with `debian-12.1.0-i386-netinst.iso`:: The bochs video driver also seems to cause problems before the OS is able to show a display.

+The QEMU `-cdrom` option is intended to work with the original ISO-format +images, not the recently invented ISOHybrid image. + Finally, the use of `-M accel=kvm` is intended to use the native CPU's virtual-machine features to accelerate operation, but this causes U-Boot to hang when jumping 64-bit mode, at least on AMD machines. This may be a bug in U-Boot