On Tue, Feb 11, 2020 at 02:23:22PM -0800, Andy Lutomirski wrote: > On Tue, Feb 11, 2020 at 5:53 AM Joerg Roedel <joro@xxxxxxxxxx> wrote: > > +void __init no_ghcb_vc_handler(struct pt_regs *regs) > > Isn't there a second parameter: unsigned long error_code? No, the function gets the error-code from regs->orig_ax. This particular function only needs to check for error_code == SVM_EXIT_CPUID, as that is the only one supported when there is no GHCB. Regards, Joerg