[PATCH v4 11/40] KVM: arm64: Improve debug register save/restore flow

[Andrew Jones]

On Thu, Feb 15, 2018 at 10:03:03PM +0100, Christoffer Dall wrote:
> Instead of having multiple calls from the world switch path to the debug
> logic, each figuring out if the dirty bit is set and if we should
> save/restore the debug registers, let's just provide two hooks to the
> debug save/restore functionality, one for switching to the guest
> context, and one for switching to the host context, and we get the
> benefit of only having to evaluate the dirty flag once on each path,
> plus we give the compiler some more room to inline some of this
> functionality.
> 
> Reviewed-by: Marc Zyngier <marc.zyngier at arm.com>
> Signed-off-by: Christoffer Dall <christoffer.dall at linaro.org>
> ---
> 
> Notes:
>     Changes since v1:
>      - Remove leading underscores from local variables
> 
>  arch/arm64/include/asm/kvm_hyp.h | 10 ++-----
>  arch/arm64/kvm/hyp/debug-sr.c    | 56 +++++++++++++++++++++++++++-------------
>  arch/arm64/kvm/hyp/switch.c      |  6 ++---
>  3 files changed, 42 insertions(+), 30 deletions(-)
>

Reviewed-by: Andrew Jones <drjones at redhat.com>