On 3/6/25 11:00 PM, 'Jarkko Sakkinen' via trenchboot-devel wrote:
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.
Yes it does mean that so I can to just "jump".
Ross
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@xxxxxxxxxx>
Otherwise this is looking somewhat decent!
BR, Jarkko
