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Re: [Xen-devel] [PATCH v6 1/9] efi: Use early_mem*() instead of early_io*()
- To: Daniel Kiper <daniel.kiper@xxxxxxxxxx>, Jan Beulich <JBeulich@xxxxxxxx>
- From: "Luck, Tony" <tony.luck@xxxxxxxxx>
- Date: Tue, 24 Jun 2014 17:56:09 +0000
- Accept-language: en-US
- Cc: "mjg59@xxxxxxxxxxxxx" <mjg59@xxxxxxxxxxxxx>, "jeremy@xxxxxxxx" <jeremy@xxxxxxxx>, "Fleming, Matt" <matt.fleming@xxxxxxxxx>, "linux-ia64@xxxxxxxxxxxxxxx" <linux-ia64@xxxxxxxxxxxxxxx>, "ian.campbell@xxxxxxxxxx" <ian.campbell@xxxxxxxxxx>, "stefano.stabellini@xxxxxxxxxxxxx" <stefano.stabellini@xxxxxxxxxxxxx>, "linux-efi@xxxxxxxxxxxxxxx" <linux-efi@xxxxxxxxxxxxxxx>, "andrew.cooper3@xxxxxxxxxx" <andrew.cooper3@xxxxxxxxxx>, "x86@xxxxxxxxxx" <x86@xxxxxxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>, "Yu, Fenghua" <fenghua.yu@xxxxxxxxx>, "mingo@xxxxxxxxxx" <mingo@xxxxxxxxxx>, "david.vrabel@xxxxxxxxxx" <david.vrabel@xxxxxxxxxx>, "hpa@xxxxxxxxx" <hpa@xxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>, "tglx@xxxxxxxxxxxxx" <tglx@xxxxxxxxxxxxx>, "boris.ostrovsky@xxxxxxxxxx" <boris.ostrovsky@xxxxxxxxxx>, "eshelton@xxxxxxxxx" <eshelton@xxxxxxxxx>
- Delivery-date: Tue, 24 Jun 2014 17:56:38 +0000
- List-id: Xen developer discussion <xen-devel.lists.xen.org>
- Thread-index: AQHPjurJMvi1kjppck6FTiWu5qFFH5uAjAbw
- Thread-topic: [PATCH v6 1/9] efi: Use early_mem*() instead of early_io*()
> I am CC'ing IA-64 guys.
The *_unmap() functions are no-op on ia64 - because we have mappings for
everything all the time
- the *_map() functions just need to compute the proper address to use to get
the right attributes
(so we don't mix and match cacheable and uncachable access to the same
address). But there is
nothing to tear down afterwards.
I do tend to agree with Daniel that is seems odd to setup the mapping with one
class of function
and then tear it down with another.
-Tony
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