Re: [PATCH stable 4.9] arm64: Save and restore OSDLR_EL1 across suspend/resume

On Thu, May 23, 2019 at 04:27:33PM +0100, Jean-Philippe Brucker wrote:

commit 827a108e354db633698f0b4a10c1ffd2b1f8d1d0 upstream

When the CPU comes out of suspend, the firmware may have modified the OS Double Lock Register. Save it in an unused slot of cpu_suspend_ctx, and restore it on resume.

Signed-off-by: Jean-Philippe Brucker jean-philippe.brucker@arm.com Signed-off-by: Will Deacon will.deacon@arm.com

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Modified for v4.9 backport: 623b476fc815 and 6d99b68933fb are missing in v4.9, but the conflict is easily resolved.

Tested on Juno with cpuidle.

Now queued up, thanks.

greg k-h