Ifcpu.c32
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[edit] About
ifcpu.c32 is a comboot module for Syslinux that checks some CPU flags and loads the appropriate label in a pxelinux.cfg file.
This is only available in Syslinux 3.84 or later.
[edit] Requirements
- working Syslinux environment
- two booting entry
[edit] Syntax
ifcpu.c32 <options> <cpu_features> -- first_label -- second_label
if the <cpu_features> match the current host, first_label is loaded, else let's boot second_label.
The use of -- is required!
[edit] Options
- debug : display some debugging messages
- dry-run : just do the detection, don't boot
[edit] CPU Features
- 64 : CPU have to be x86_64 compatible
- hvm : Processor must have hardware virtualization (hvm or svm)
- multicore : Processor must be multi-core
- smp : System have to be SMP
if you want to match many cpu features, just separate them with a single space
[edit] Example
Here is an example pxelinux.cfg file for booting
label test
com32 ifcpu.c32
append 64 hvm multicore -- boot_entry_1 -- boot_entry_2
label boot_entry_1
kernel vmlinuz
append ...
label boot_entry_2
kernel vmlinuz_64
append ...
[edit] Further Reading
None
[edit] See Also
- Ifcpu64.c32 - Detection of 64bits capable CPUs
