On Fri, Feb 21, 2025, Sean Christopherson wrote: > @@ -15,7 +17,7 @@ sipi_entry: > or $1, %eax > mov %eax, %cr0 > lgdtl ap_rm_gdt_descr - sipi_entry > - ljmpl $8, $ap_start32 > + ljmpl $KERNEL_CS32, $ap_start32 Gah, this is wrong, it should be KERNEL_CS, not KERNEL_CS32. It was wrong in the original posting as well. Not sure how I missed it the first time around. I'll fixup when applying.