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[for-8.0,0/9] arm: Convert Arm GIC, ITS, SMMU devices to 3-phase reset

Message ID 20221109161444.3397405-1-peter.maydell@linaro.org
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Series arm: Convert Arm GIC, ITS, SMMU devices to 3-phase reset | expand

Message

Peter Maydell Nov. 9, 2022, 4:14 p.m. UTC 
This patchset converts some Arm devices to 3-phase reset.  The
rationale here is that it would be nice to get rid of the
device_class_set_parent_reset() function, which is used by
legacy-reset subclasses which want to chain to their parent's reset
function. There aren't very many of these devices in total, and
if we convert them and their parent classes to 3-phase reset they
can use the 3-phase-reset equivalent function
resettable_class_set_parent_phases().

Eventually this will then let us simplify the transitional
code for handling old-style device reset.

Note that it's necessary to convert the parent class before
the subclass -- the resettable transitional logic will
handle the situation where the subclass is still using
legacy reset and chaining to what it thinks is the parent's
legacy reset function (by doing a 3-phase reset on the parent),
but if the subclass is 3-phase then the parent must be too.

I plan to do the other uses of device_class_set_parent_reset()
too, but since the conversion patchsets don't depend on each
other I'm going to send them out piecemeal so they can be
cc'd to the relevant maintainers, rather than having a
single massive patchset with a billion people on cc.

thanks
-- PMM

Peter Maydell (9):
  hw/arm: Convert TYPE_ARM_SMMU to 3-phase reset
  hw/arm: Convert TYPE_ARM_SMMUV3 to 3-phase reset
  hw/intc: Convert TYPE_ARM_GIC_COMMON to 3-phase reset
  hw/intc: Convert TYPE_ARM_GIC_KVM to 3-phase reset
  hw/intc: Convert TYPE_ARM_GICV3_COMMON to 3-phase reset
  hw/intc: Convert TYPE_KVM_ARM_GICV3 to 3-phase reset
  hw/intc: Convert TYPE_ARM_GICV3_ITS_COMMON to 3-phase reset
  hw/intc: Convert TYPE_ARM_GICV3_ITS to 3-phase reset
  hw/intc: Convert TYPE_KVM_ARM_ITS to 3-phase reset

 include/hw/arm/smmuv3.h        |  2 +-
 hw/arm/smmu-common.c           |  7 ++++---
 hw/arm/smmuv3.c                | 12 ++++++++----
 hw/intc/arm_gic_common.c       |  7 ++++---
 hw/intc/arm_gic_kvm.c          | 14 +++++++++-----
 hw/intc/arm_gicv3_common.c     |  7 ++++---
 hw/intc/arm_gicv3_its.c        | 14 +++++++++-----
 hw/intc/arm_gicv3_its_common.c |  7 ++++---
 hw/intc/arm_gicv3_its_kvm.c    | 14 +++++++++-----
 hw/intc/arm_gicv3_kvm.c        | 14 +++++++++-----
 10 files changed, 61 insertions(+), 37 deletions(-)