[PATCH v12 09/19] x86: Secure Launch kernel early boot stub

[Jarkko Sakkinen]

On Thu, Dec 19, 2024 at 11:42:06AM -0800, Ross Philipson wrote:
> The Secure Launch (SL) stub provides the entry point for Intel TXT (and
> later AMD SKINIT) to vector to during the late launch. The symbol

Does "to vector to" translate into to jump into during late launch? :-)

Given the complicated topic in the first place I'd use as down to
earth language as I possibly could where it can be used.



> sl_stub_entry is that entry point and its offset into the kernel is
> conveyed to the launching code using the MLE (Measured Launch
> Environment) header in the structure named mle_header. The offset of the
> MLE header is set in the kernel_info. The routine sl_stub contains the
> very early late launch setup code responsible for setting up the basic
> environment to allow the normal kernel startup_32 code to proceed. It is
> also responsible for properly waking and handling the APs on Intel
> platforms. The routine sl_main which runs after entering 64b mode is
> responsible for measuring configuration and module information before
> it is used like the boot params, the kernel command line, the TXT heap,
> an external initramfs, etc.
> 
> Signed-off-by: Ross Philipson <ross.philipson at oracle.com>

Otherwise this is looking somewhat decent!

BR, Jarkko