[PATCH v7 01/16] arm64: KVM: Register CPU notifiers when the kernel runs at HYP

Marc Zyngier marc.zyngier at arm.com
Tue Apr 19 07:39:44 PDT 2016

On 19/04/16 09:58, James Morse wrote:
> Hi Catalin,
> On 18/04/16 17:10, Catalin Marinas wrote:
>> On Fri, Apr 01, 2016 at 05:53:25PM +0100, James Morse wrote:
>>> When the kernel is running at EL2, it doesn't need init_hyp_mode() to
>>> configure page tables for HYP. This function also registers the CPU
>>> hotplug and lower power notifiers that cause HYP to be re-initialised
>>> after the CPU has been reset.
>>> To avoid losing the register state that controls stage2 translation, move
>>> the registering of these notifiers into init_subsystems(), and add a
>>> is_kernel_in_hyp_mode() path to each callback.
>>> Fixes: 1e947bad0b6 ("arm64: KVM: Skip HYP setup when already running in HYP")
>>> Signed-off-by: James Morse <james.morse at arm.com>
>> To the best of my knowledge of the hyp code:
>> Acked-by: Catalin Marinas <catalin.marinas at arm.com>
> Thanks,
>> Since it has a Fixes tag, does this need to be picked for 4.6 or a Cc:
>> stable if it goes in later?
> This patch was sent as a separate fix for rc1, its here too so that this series
> can be applied directly from the list without conflicts after rc2.

For the record, this has been merged in 4.6-rc3.


Jazz is not dead. It just smells funny...

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