lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Mon, 16 Jun 2014 02:19:46 +0100
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	Daniel Kiper <daniel.kiper@...cle.com>
Cc:	linux-efi@...r.kernel.org, linux-kernel@...r.kernel.org,
	x86@...nel.org, xen-devel@...ts.xenproject.org,
	andrew.cooper3@...rix.com, boris.ostrovsky@...cle.com,
	david.vrabel@...rix.com, eshelton@...ox.com, hpa@...or.com,
	ian.campbell@...rix.com, jbeulich@...e.com, jeremy@...p.org,
	konrad.wilk@...cle.com, matt.fleming@...el.com, mingo@...hat.com,
	stefano.stabellini@...citrix.com, tglx@...utronix.de
Subject: Re: [PATCH v5 1/7] efi: Use early_mem*() instead of early_io*()

On Fri, Jun 13, 2014 at 07:00:17PM +0200, Daniel Kiper wrote:
> Use early_mem*() instead of early_io*() because all mapped EFI regions
> are true RAM not I/O regions. Additionally, I/O family calls do not work
> correctly under Xen in our case. AIUI, early_io*() maps/unmaps real machine
> addresses. However, all artificial EFI structures created under Xen live
> in dom0 memory and should be mapped/unmapped using early_mem*() family
> calls which map domain memory.

Mapped EFI regions may include memory mapped flash, not merely true RAM.

-- 
Matthew Garrett | mjg59@...f.ucam.org
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Powered by blists - more mailing lists