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Message-ID: <20140616011946.GC5104@srcf.ucam.org> 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/
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