linux-kernel - Re: [PATCH] flush icache before set

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Message-Id: <20070727010825.a5934cb0.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Fri, 27 Jul 2007 01:08:25 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Zoltan Menyhart <Zoltan.Menyhart@...l.net>
Cc:	tony.luck@...el.com, linux-ia64@...r.kernel.org,
	linux-kernel@...r.kernel.org, nickpiggin@...oo.com.au
Subject: Re: [PATCH] flush icache before set_pte on ia64 take3

On Thu, 26 Jul 2007 17:13:52 +0200
Zoltan Menyhart <Zoltan.Menyhart@...l.net> wrote:

> I can agree:
> - lazy_mmu_prot_update() is not the right place for a flush
> - to flush I-cache before inserting PTE (at least for the
>   machines with physical address tagged caches)
> 
> Can we have a separate, specific exec_flush_phtag_icache_page()
> that is to be called before inserting a PTE with the exec bit on
> for physical address tagged I-caches) ?
> It is defined in asm-generic/cacheflush.h as NO-OP.
> 
> Or exec_flush_icache_page_before_set_pte() ?
> 
Thank you for advise. Hmm..how about this ?
==
 /*
  * synchronize icache and dcache if the hardware doesn't do it automatically
  * and the page is executable.
  */
static inline arch_sync_icache_dcache(pte_t pte, page) {

}
==

Anyway, I understand your point. Thanks!

Regards,
- Kame
-
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