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Date:      Mon, 22 Oct 2018 10:14:08 -0700 (PDT)
From:      "Rodney W. Grimes" <freebsd-rwg@pdx.rh.CN85.dnsmgr.net>
To:        Victor Sudakov <vas@mpeks.tomsk.su>
Cc:        Jason Barbier <kusuriya@serversave.us>, freebsd-virtualization@freebsd.org
Subject:   Re: bhyve uefi="csm"
Message-ID:  <201810221714.w9MHE83d011516@pdx.rh.CN85.dnsmgr.net>
In-Reply-To: <20181021162742.GA10064@admin.sibptus.ru>

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> Rodney W. Grimes wrote:
> > > Can you tell us a bit about your set up, like are you using helper scripts like libvirt?
> > > To answer the question you asked when I run a vm with the CSM firmware it works for me.
> > 
> > You should always be able to boot a vm that uses
> > and boots with the non CSM uefi firmware with the
> > CSM version of the firmware, failures may start
> > to show up if your booting something that is
> > either purely legacy, or efi aware but falls
> > back to csm because it didnt like something.
> 
> If my goal were to boot FreeDOS in bhyve, would that be ever possible?

Today no, due to the fact we do not have a ATA/legacy
emulation, but rather only ahci disk emultaion, though
I would be wrong on that point if FreeDOS has an ahci
disk driver.

This goal is on my "want" list for bhyve to be able
to do.   THere is a GSOC ata driver emulation that
works some, but I do not think it can accomplish
this task at this time.

I do not know if the CSM code is up to this task
either, but it should be.

> > The older ED2K uefi that we are using and
> > some of the hatchetry that was used to craft
> > its CSM are in a poor state and could use
> > some love. 
> 

-- 
Rod Grimes                                                 rgrimes@freebsd.org



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