Hi Harrison, On Fri, 15 Nov 2024 at 05:49, Harrison Mutai <[email protected]> wrote: > > Hi Simon, > > Thanks for the clarification. > > On 14/11/2024 22:06, Simon Glass wrote: > > Hi Harrison, > > > > On Thu, 14 Nov 2024 at 13:41, Harrison Mutai <[email protected]> wrote: > >> > >> Hi all, > >> I wanted to clarify some details about the settings for initializing a > >> Bloblist (i.e., CONFIG_BLOBLIST_ALLOC, CONFIG_BLOBLIST_FIXED, > >> CONFIG_BLOBLIST_PASSAGE). The documentation states that if > >> CONFIG_BLOBLIST_PASSAGE is selected, it uses the bloblist in the incoming > >> standard passage. > >> Does this mean that the bloblist is used in-place wherever the previous > >> stage places it? For example, if TF-A passes a bloblist at an address > >> specified in the platform's boot parameters, would this mode use the > >> bloblist in that location? > > > > Yes that's right, but if BLOBLIST_SIZE_RELOC is used, U-Boot may relocate > > it. > > > That's what I thought but was slightly tripped-up by the wording in the > documentation. Correct me if I'm mistaken, but it doesn't appear to be a > supported use-case in U-Boot currently? From what I can see, > bloblist_init assumes either BLOBLIST_ALLOC or BLOBLIST_FIXED.
Ah, I see. Yes, you are right. The xferlist_from_boot_arg() side of things looks like it needs a bit of work. We should be simply accepting what is passed in, not relocating it to the fixed address. > >> The reason I ask is that I'm preparing some patches to add bloblist > >> support to vexpress64, and I'm looking to configure this platform without > >> specifying BLOBLIST_ADDR or BLOBLIST_SIZE (i.e., automatically detect > >> these). OK, well see if you can tidy it up a little. > > > > Yes, that is a better way to do it, now that we have the ability to > > pass a bloblist between phases. > > > > > >> Thanks for your help! > >> Best regards, > >> Harrison > >> > >> IMPORTANT NOTICE: The contents of this email and any attachments are > >> confidential and may also be privileged. If you are not the intended > >> recipient, please notify the sender immediately and do not disclose the > >> contents to any other person, use it for any purpose, or store or copy the > >> information in any medium. Thank you. > > > > I hope not! > > > Argh - apologies for this! > > Regards, > > Simon > > All the best, > Harrison Regards, SImon
