From: Matthew Garrett <mjg59@srcf.ucam.org>
To: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>, Ingo Molnar <mingo@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Linus Torvalds <torvalds@linux-foundation.org>,
"linux-efi@vger.kernel.org" <linux-efi@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Matt Fleming <matt.fleming@intel.com>
Subject: Re: RFC: default CONFIG_EFI_STUB=y
Date: Thu, 15 Aug 2013 06:15:09 +0100 [thread overview]
Message-ID: <20130815051509.GB1933@srcf.ucam.org> (raw)
In-Reply-To: <1376419410.3467.67.camel@dabdike.int.hansenpartnership.com>
On Tue, Aug 13, 2013 at 11:43:30AM -0700, James Bottomley wrote:
> Can we actually boot a 32 bit kernel on an EFI64 system? The last time
> I tried on my Secure Boot SDV it wouldn't work; the problem is getting
> someting in the transfer of control path to boot the processor back to
> 32 bit mode.
In theory, as long as you jump to the 32-bit entry point having already
set the cpu to that mode. The linux command in grub2 ought to do that.
--
Matthew Garrett | mjg59@srcf.ucam.org
prev parent reply other threads:[~2013-08-15 5:15 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-09 15:23 H. Peter Anvin
2013-08-09 15:32 ` James Bottomley
2013-08-09 15:38 ` H. Peter Anvin
2013-08-13 18:30 ` H. Peter Anvin
2013-08-13 18:43 ` James Bottomley
2013-08-13 18:52 ` H. Peter Anvin
2013-08-13 19:02 ` James Bottomley
2013-08-13 19:06 ` H. Peter Anvin
2013-08-15 5:15 ` Matthew Garrett [this message]
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