From: Mark Nelson <markn@au1.ibm.com>
To: linuxppc-dev@ozlabs.org
Cc: cbe-oss-dev@ozlabs.org
Subject: [PATCH 1/2] powerpc: add new CPU feature: CPU_FTR_CP_USE_DCBTZ
Date: Fri, 22 Aug 2008 14:36:19 +1000 [thread overview]
Message-ID: <200808221436.19517.markn@au1.ibm.com> (raw)
In-Reply-To: <200808141617.32033.markn@au1.ibm.com>
Add a new CPU feature bit, CPU_FTR_CP_USE_DCBTZ, to be added to the
64bit powerpc chips that benefit from having dcbt and dcbz
instructions used in their memory copy routines.
This will be used in a subsequent patch that updates copy_4K_page().
The new bit is added to Cell, PPC970 and Power4 because they show
better performance with the new copy_4K_page() when dcbt and dcbz
instructions are used.
Signed-off-by: Mark Nelson <markn@au1.ibm.com>
---
arch/powerpc/include/asm/cputable.h | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
Index: upstream/arch/powerpc/include/asm/cputable.h
===================================================================
--- upstream.orig/arch/powerpc/include/asm/cputable.h
+++ upstream/arch/powerpc/include/asm/cputable.h
@@ -192,6 +192,7 @@ extern const char *powerpc_base_platform
#define CPU_FTR_NO_SLBIE_B LONG_ASM_CONST(0x0008000000000000)
#define CPU_FTR_VSX LONG_ASM_CONST(0x0010000000000000)
#define CPU_FTR_SAO LONG_ASM_CONST(0x0020000000000000)
+#define CPU_FTR_CP_USE_DCBTZ LONG_ASM_CONST(0x0040000000000000)
#ifndef __ASSEMBLY__
@@ -387,10 +388,11 @@ extern const char *powerpc_base_platform
CPU_FTR_MMCRA | CPU_FTR_CTRL)
#define CPU_FTRS_POWER4 (CPU_FTR_USE_TB | CPU_FTR_LWSYNC | \
CPU_FTR_HPTE_TABLE | CPU_FTR_PPCAS_ARCH_V2 | CPU_FTR_CTRL | \
- CPU_FTR_MMCRA)
+ CPU_FTR_MMCRA | CPU_FTR_CP_USE_DCBTZ)
#define CPU_FTRS_PPC970 (CPU_FTR_USE_TB | CPU_FTR_LWSYNC | \
CPU_FTR_HPTE_TABLE | CPU_FTR_PPCAS_ARCH_V2 | CPU_FTR_CTRL | \
- CPU_FTR_ALTIVEC_COMP | CPU_FTR_CAN_NAP | CPU_FTR_MMCRA)
+ CPU_FTR_ALTIVEC_COMP | CPU_FTR_CAN_NAP | CPU_FTR_MMCRA | \
+ CPU_FTR_CP_USE_DCBTZ)
#define CPU_FTRS_POWER5 (CPU_FTR_USE_TB | CPU_FTR_LWSYNC | \
CPU_FTR_HPTE_TABLE | CPU_FTR_PPCAS_ARCH_V2 | CPU_FTR_CTRL | \
CPU_FTR_MMCRA | CPU_FTR_SMT | \
@@ -411,7 +413,8 @@ extern const char *powerpc_base_platform
#define CPU_FTRS_CELL (CPU_FTR_USE_TB | CPU_FTR_LWSYNC | \
CPU_FTR_HPTE_TABLE | CPU_FTR_PPCAS_ARCH_V2 | CPU_FTR_CTRL | \
CPU_FTR_ALTIVEC_COMP | CPU_FTR_MMCRA | CPU_FTR_SMT | \
- CPU_FTR_PAUSE_ZERO | CPU_FTR_CI_LARGE_PAGE | CPU_FTR_CELL_TB_BUG)
+ CPU_FTR_PAUSE_ZERO | CPU_FTR_CI_LARGE_PAGE | \
+ CPU_FTR_CELL_TB_BUG | CPU_FTR_CP_USE_DCBTZ)
#define CPU_FTRS_PA6T (CPU_FTR_USE_TB | CPU_FTR_LWSYNC | \
CPU_FTR_HPTE_TABLE | CPU_FTR_PPCAS_ARCH_V2 | \
CPU_FTR_ALTIVEC_COMP | CPU_FTR_CI_LARGE_PAGE | \
next prev parent reply other threads:[~2008-08-22 4:36 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-14 6:17 [RFC 0/2] powerpc: copy_4K_page tweaked for Cell Mark Nelson
2008-08-22 4:32 ` [PATCH 0/2] powerpc: new copy_4K_page() Mark Nelson
2008-08-22 4:36 ` Mark Nelson [this message]
2008-08-22 4:39 ` [PATCH 2/2] " Mark Nelson
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=200808221436.19517.markn@au1.ibm.com \
--to=markn@au1.ibm.com \
--cc=cbe-oss-dev@ozlabs.org \
--cc=linuxppc-dev@ozlabs.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).