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linux/arch/powerpc/platforms
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Christophe Leroy cd99ddbea2 powerpc/8xx: Only perform perf counting when perf is in use. 
In TLB miss handlers, updating the perf counter is only useful
when performing a perf analysis. As it has a noticeable overhead,
let's only do it when needed.

In order to do so, the exit of the miss handlers will be patched
when starting/stopping 'perf': the first register restore
instruction of each exit point will be replaced by a jump to
the counting code.

Once this is done, CONFIG_PPC_8xx_PERF_EVENT becomes useless as
this feature doesn't add any overhead.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-01-16 23:47:12 +11:00
..
4xx powerpc/4xx: Constify cpm_suspend_ops 2017-08-31 19:56:33 +10:00
8xx powerpc/8xx: Remove CPU6 ERRATA Workaround 2018-01-16 23:47:12 +11:00
40x License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
44x powerpc/44x/fsp2: Add irq error handlers 2017-12-11 13:03:34 +11:00
52xx License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
82xx License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
83xx powerpc: Use of for_each_node_by_name() instead of open-coding it 2017-12-04 13:10:59 +11:00
85xx powerpc: Use pr_warn instead of pr_warning 2017-12-04 11:54:34 +11:00
86xx powerpc: Use pr_warn instead of pr_warning 2017-12-04 11:54:34 +11:00
512x powerpc: Use pr_warn instead of pr_warning 2017-12-04 11:54:34 +11:00
amigaone License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
cell powerpc: make use of for_each_node_by_type() instead of open-coding it 2018-01-16 23:47:10 +11:00
chrp License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
embedded6xx License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
maple License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pasemi powerpc: Use pr_warn instead of pr_warning 2017-12-04 11:54:34 +11:00
powermac powerpc: make use of for_each_node_by_type() instead of open-coding it 2018-01-16 23:47:10 +11:00
powernv powernv/kdump: Fix cases where the kdump kernel can get HMI's 2018-01-16 23:47:11 +11:00
ps3 powerpc: Use pr_warn instead of pr_warning 2017-12-04 11:54:34 +11:00
pseries powerpc: make use of for_each_node_by_type() instead of open-coding it 2018-01-16 23:47:10 +11:00
fsl_uli1575.c of/irq: Refactor interrupt-map parsing 2013-10-24 11:43:04 +01:00
Kconfig Merge branch 'for-linus' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2017-11-15 10:14:11 -08:00
Kconfig.cputype powerpc/8xx: Only perform perf counting when perf is in use. 2018-01-16 23:47:12 +11:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00