Date: Wed, 17 Jun 2020 14:49:02 -0600 From: Rebecca Cran <rebecca@bsdio.com> To: "Rodney W. Grimes" <freebsd-rwg@gndrsh.dnsmgr.net> Cc: Warner Losh <imp@bsdimp.com>, Miguel C <miguelmclara@gmail.com>, FreeBSD Current <FreeBSD-current@freebsd.org> Subject: Re: CTF: UEFI HTTP boot support Message-ID: <d9cd34a5-f6eb-721a-ca15-a36e50985548@bsdio.com> In-Reply-To: <202006172011.05HKBS4q087132@gndrsh.dnsmgr.net> References: <202006172011.05HKBS4q087132@gndrsh.dnsmgr.net>
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On 6/17/20 2:11 PM, Rodney W. Grimes wrote: > Does freeBSD have any way to access these "Virtual Disk" > or Virtual CD images once we leave the world of the loader? > I believe we do not, as these are BIOS/UEFI devices that > require calls into the UEFI code, which, IIRC is gone > once we exit the loader and start the kernel proper, > or shortly there after. > > As far as I know these devices well not be found by the FreeBSD > cam layer ATA or AHCI drivers as they do not present an actual > PCI device to find. I just tried it on my Supermicro server and you're right, it doesn't show up under FreeBSD. I'm not sure if there's a way to access them via UEFI Runtime Services or if it's designed purely as a boot-time thing. -- Rebecca Cran
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