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about kernel configuration CONFIG_CPU_ARM_CORTEX_A15
- From: yoma sophian <sophian dot yoma at gmail dot com>
- To: gcc-help at gcc dot gnu dot org, linux-arm-kernel at lists dot infradead dot org
- Date: Mon, 5 Sep 2016 14:36:18 +0800
- Subject: about kernel configuration CONFIG_CPU_ARM_CORTEX_A15
- Authentication-results: sourceware.org; auth=none
hi all:
if we run cortex-a53 in aarch32 mode, shall we enable
"CONFIG_CPU_ARM_CORTEX_A15" this compile option when generating kernel
image?
>From below gcc path
https://gcc.gnu.org/git/?p=gcc.git;a=blob;f=gcc/config/arm/cortex-a15.md;h=ccab7cbe90621459ad7356074d1543be59d5d929;hb=gcc-4_7-branch
, the "CONFIG_CPU_ARM_CORTEX_A15" seems used to optimize cotex a15
code flow based on its pipeline architecture.
if pipeline architecture is the only consideration for enable
"CONFIG_CPU_ARM_CORTEX_A15" and if cortex a53 in aarch32 mode has the
same pipeline architecture as cortex a15, does that mean we could
enable "CONFIG_CPU_ARM_CORTEX_A15" ?
Meanwhile, how about other armv8-a processor, such as cortex a57, a72, etc.?
shall we enable "CONFIG_CPU_ARM_CORTEX_A15" for them when running
kernel in aarch32 mode?
appreciate your kind help in advance,