* Peter Zijlstra <pet...@infradead.org> wrote:
> The boot trampolines from trampoline_64.S have code flow like:
>
> 16bit BIOS SEV-ES 64bit EFI
>
> trampoline_start() sev_es_trampoline_start()
> trampoline_start_64()
> verify_cpu() | |
> switch_to_protected: <---------------' v
> |
> pa_trampoline_compat()
> v |
> startup_32()
> <-----------------------------------------------'
> |
> v
> startup_64()
> |
> v
> tr_start() := head_64.S:secondary_startup_64()
oh ... this nice flow chart should move into a prominent C comment I think,
it's far too good to be forgotten in an Git commit changelog.
> Since AP bringup always goes through the 16bit BIOS path (EFI doesn't
> touch the APs), there is already a verify_cpu() invocation.
>
> Removing the verify_cpu() invocation from secondary_startup_64()
> renders the whole secondary_startup_64_no_verify() thing moot, so
> remove that too.
>
> Cc: jroe...@suse.de
> Cc: h...@zytor.com
> Fixes: e81dc127ef69 ("x86/callthunks: Add call patching for call depth
> tracking")
> Reported-by: Joan Bruguera <joanbrugue...@gmail.com>
> Signed-off-by: Peter Zijlstra (Intel) <pet...@infradead.org>
Reviewed-by: Ingo Molnar <mi...@kernel.org>
Thanks,
Ingo
