From: Kevin Hao <haokexin@gmail.com>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: linuxppc <linuxppc-dev@lists.ozlabs.org>
Subject: [PATCH v2 3/3] powerpc: check CPU_FTR_COHERENT_ICACHE in __flush_dcache_icache for 64bit kernel
Date: Thu, 15 Aug 2013 19:45:18 +0800 [thread overview]
Message-ID: <1376567118-16946-1-git-send-email-haokexin@gmail.com> (raw)
In-Reply-To: <20130807060950.GC26904@pek-khao-d1.corp.ad.wrs.com>
We don't need to flush the dcache and invalidate the icache on the
CPU which has CPU_FTR_COHERENT_ICACHE set. Also add the missing
required isync in this case.
Signed-off-by: Kevin Hao <haokexin@gmail.com>
---
v2: Add the isync.
arch/powerpc/kernel/misc_64.S | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/powerpc/kernel/misc_64.S b/arch/powerpc/kernel/misc_64.S
index 971d7e7..992a78e 100644
--- a/arch/powerpc/kernel/misc_64.S
+++ b/arch/powerpc/kernel/misc_64.S
@@ -207,6 +207,10 @@ _GLOBAL(flush_inval_dcache_range)
* void __flush_dcache_icache(void *page)
*/
_GLOBAL(__flush_dcache_icache)
+BEGIN_FTR_SECTION
+ isync
+ blr
+END_FTR_SECTION_IFSET(CPU_FTR_COHERENT_ICACHE)
/*
* Flush the data cache to memory
*
--
1.8.3.1
prev parent reply other threads:[~2013-08-15 11:50 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-06 10:23 [PATCH 0/3] powerpc: several patches for icache flush Kevin Hao
2013-08-06 10:23 ` [PATCH 1/3] powerpc: move the testing of CPU_FTR_COHERENT_ICACHE into __flush_icache_range Kevin Hao
2013-08-06 10:35 ` Benjamin Herrenschmidt
2013-08-07 6:09 ` Kevin Hao
2013-08-06 10:23 ` [PATCH 2/3] powerpc: remove the symbol __flush_icache_range Kevin Hao
2013-08-06 10:23 ` [PATCH 3/3] powerpc: check CPU_FTR_COHERENT_ICACHE in __flush_dcache_icache for 64bit kernel Kevin Hao
2013-08-06 10:36 ` Benjamin Herrenschmidt
2013-08-07 6:09 ` Kevin Hao
2013-08-15 11:45 ` Kevin Hao [this message]
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