From 9804e572cf1ade7a0aae000740e6159a1e5394fd Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Fri, 1 Sep 2023 12:08:23 -0600 Subject: [PATCH] x86: doc: Document the -cdrom issues I ran into Add a note about using -cdrom with QEMU. Suggested-by: Bin Meng Signed-off-by: Simon Glass Reviewed-by: Bin Meng --- 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 15f56b6bc7..c604e42990 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 -- 2.39.5