linux-kernel - Re: Use PCI ROMs from EFI boot services

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Message-ID: <87vccgm3kk.fsf@xmission.com>
Date:	Wed, 05 Dec 2012 16:23:07 -0800
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Matthew Garrett <mjg59@...f.ucam.org>
Cc:	Yinghai Lu <yinghai@...nel.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
	linux-efi@...r.kernel.org, mfleming@...el.com, dwmw2@...radead.org,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: Use PCI ROMs from EFI boot services

Matthew Garrett <mjg59@...f.ucam.org> writes:

> On Wed, Dec 05, 2012 at 04:15:56PM -0800, Yinghai Lu wrote:
>
>> at the same time we should export setup_data into /sys, so kexec could
>> append this pointer to command of
>> second kernel, just like kexec append acpi_rsdp.
>> That should address DavidW's concern.
>
> Why should the kernel export data to userspace just so that that data 
> can be passed back into the kernel?

Because it is useful for more than just kexec and because that is the
current architecture.

Eric

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