Re: [PATCH 14/62] x86/boot/compressed/64: Add stage1 #VC handler

From: Joerg Roedel
Date: Wed Feb 12 2020 - 06:38:58 EST


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