From: Andi Kleen <ak@suse.de>
To: Arjan van de Ven <arjan@infradead.org>
Cc: "Huang, Ying" <ying.huang@intel.com>,
Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>,
linux-kernel@vger.kernel.org
Subject: Re: ioremap_xxx() with EXEC enabled
Date: Wed, 30 Jan 2008 19:35:38 +0100 [thread overview]
Message-ID: <200801301935.39069.ak@suse.de> (raw)
In-Reply-To: <20080130094427.720fdae7@laptopd505.fenrus.org>
> 1) 32 bit EFI is totally irrelevant.
Apparently not to the original poster. And some Apple x86 users might
also disagree.
On x86-64 BTW while they could still rely on end_pfn_mapped and
it being direct mapped Venki's PAT patchkit removes that so ioremap
would be needed there too
> 2) set_memory_ and set_pages_ API is not restricted to direct mapping.
> That's why they take a virtual address / struct page
If there is no direct mapping what page tables should they change?
Surely you're not suggesting they should walk all vmalloc areas and switch
them over. I don't think this is correct.
-Andi
prev parent reply other threads:[~2008-01-30 18:35 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-30 9:32 Huang, Ying
2008-01-30 9:59 ` Andi Kleen
2008-01-30 13:00 ` huang ying
2008-01-30 13:22 ` Andi Kleen
2008-01-30 15:45 ` Arjan van de Ven
2008-01-30 17:30 ` Andi Kleen
2008-01-30 17:44 ` Arjan van de Ven
2008-01-30 18:35 ` Andi Kleen [this message]
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