arm64: kernel: implement HW breakpoints CPU PM notifier

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When a CPU is shutdown either through CPU idle or suspend to RAM, the
content of HW breakpoint registers must be reset or restored to proper
values when CPU resume from low power states. This patch adds debug register
restore operations to the HW breakpoint control function and implements a
CPU PM notifier that allows to restore the content of HW breakpoint registers
to allow proper suspend/resume operations.

Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>

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Lorenzo Pieralisi 2013-08-05 15:20:35 +01:00

parent 2f04304587

commit 60fc6942f6

1 changed files with 66 additions and 13 deletions

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arch/arm64/kernel/hw_breakpoint.c

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