Subject: [PATCH v4 00/20] arm64: GICv3 support

From: [email-masked] (Abel)
Date: Wed, 11 Jun 2014 09:49:40 +0800

Hi Marc,

Add:
Reviewed-by: Yun Wu <[email-masked]>
Acked-by: Zhen Lei <[email-masked]>

for the first 4 patches, that is:
>   ARM: GIC: move some bits of GICv2 to a library-type file
>   arm64: initial support for GICv3
>   arm64: GICv3 device tree binding documentation
>   arm64: boot protocol documentation update for GICv3

Cheers,
Abel.

On 2014/5/16 1:58, Marc Zyngier wrote:

> GICv3 is the base for a new generation of interrupt controllers
> designed to overcome some of the most glaring limitations of GICv2.
> 
> Some of the features are:
> - Support for more than 8 CPUs (a lot more...)
> - System registers for CPU interface access (instead of the memory
>   mapped GICC, GICV, GICH)
> - Message based interrupts
> 
> This patch series currently support:
> - Affinity Routing
> - System Registers
> - Non-Secure Group-1 interrupts only
> - KVM support (GICv3 host, GICv2 guest)
> 
> What is *not yet* supported in this series (WIP):
> - LPI/ITS/MSI
> - KVM GICv3 guest support
> - Any form of power management
> - 32bit systems
> 
> To be built, this code requires a fairly recent compiler/binutils
> combo. Linaro 13.06 seems to do the trick. This has been tested on the
> ARM FVP and Foundation models, with non-regressions run on a VExpress
> TC-2 and another Cortex-A57 based platform.
> 
> So far, the level of reviewing has been embarassingly low (my sincere
> thanks to Christoffer and Will for being the only ones to review
> it). While the documentation is unfortunately not public yet, it is
> available to those actively implementing GICv3 in their hardware, and
> I'm really eager to see reviews and test reports.
> 
> Without that kind of engagement, it is unlikely that this code will
> get merged any time soon.
> 
> Individuals without access to documentation and/or hardware can still
> review the code (it shares a lot of concepts with GICv2) and test in
> on the freely available Foundation model (see
> http://releases.linaro.org/latest/openembedded/aarch64/ for details on
> how to use the Foundation model).
> 
> The code is also available at the following location (warning,
> unstable branch!):
> git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git kvm-arm64/gicv3
> 
> * From v3 [3]
>   - Fixed a lot of issues found by Christoffer (too many to report
>     here, see the email thread)
>   - New .sync_lr_elrsr backend
>   - New probing method
>   - New irqchip_in_kernel implementation
>   - Checked full bisectability of the series (hopefully got it right
>     this time...)
>   - rebased on top of 3.15-rc5
> 
> * From v2 [2]
>   - removed sharing of the xlate method with GICv2 (TI crossbar is now
>     getting in the way...)
>   - Switched to a tree domain to accomodate for the LPI space
>   - Fixed more bisectability
> 
> * From the initial revision [1]
>   - Some code sharing with GICv2
>   - Barrier cleanup/clarification
>   - Revised boot protocol update
>   - Consistent use of the MPIDR access macros
>   - Fixed a number of embarassing bugs
>   - Fixed DT examples
>   - Fixed bisectability of the series
> 
> [1]: http://lists.infradead.org/pipermail/linux-arm-kernel/2014-February/229959.html
> [2]: http://lists.infradead.org/pipermail/linux-arm-kernel/2014-March/241972.html
> [3]: http://lists.infradead.org/pipermail/linux-arm-kernel/2014-April/248008.html
> 
> Marc Zyngier (20):
>   ARM: GIC: move some bits of GICv2 to a library-type file
>   arm64: initial support for GICv3
>   arm64: GICv3 device tree binding documentation
>   arm64: boot protocol documentation update for GICv3
>   KVM: arm/arm64: vgic: move GICv2 registers to their own structure
>   KVM: ARM: vgic: introduce vgic_ops and LR manipulation primitives
>   KVM: ARM: vgic: abstract access to the ELRSR bitmap
>   KVM: ARM: vgic: abstract EISR bitmap access
>   KVM: ARM: vgic: abstract MISR decoding
>   KVM: ARM: vgic: move underflow handling to vgic_ops
>   KVM: ARM: vgic: abstract VMCR access
>   KVM: ARM: vgic: introduce vgic_enable
>   KVM: ARM: introduce vgic_params structure
>   KVM: ARM: vgic: split GICv2 backend from the main vgic code
>   KVM: ARM: vgic: revisit implementation of irqchip_in_kernel
>   arm64: KVM: remove __kvm_hyp_code_{start,end} from hyp.S
>   arm64: KVM: split GICv2 world switch from hyp code
>   arm64: KVM: move HCR_EL2.{IMO,FMO} manipulation into the vgic switch
>     code
>   KVM: ARM: vgic: add the GICv3 backend
>   arm64: KVM: vgic: add GICv3 world switch
> 
>  Documentation/arm64/booting.txt                  |   6 +
>  Documentation/devicetree/bindings/arm/gic-v3.txt |  79 +++
>  arch/arm/include/asm/kvm_host.h                  |   5 +
>  arch/arm/kernel/asm-offsets.c                    |  14 +-
>  arch/arm/kvm/Makefile                            |   1 +
>  arch/arm/kvm/interrupts_head.S                   |  26 +-
>  arch/arm64/Kconfig                               |   1 +
>  arch/arm64/include/asm/kvm_arm.h                 |   5 +-
>  arch/arm64/include/asm/kvm_asm.h                 |  14 +-
>  arch/arm64/include/asm/kvm_host.h                |  28 +
>  arch/arm64/include/asm/virt.h                    |   4 +
>  arch/arm64/kernel/asm-offsets.c                  |  25 +-
>  arch/arm64/kernel/head.S                         |  18 +
>  arch/arm64/kernel/hyp-stub.S                     |   1 +
>  arch/arm64/kvm/Makefile                          |   4 +
>  arch/arm64/kvm/hyp.S                             | 127 +----
>  arch/arm64/kvm/vgic-v2-switch.S                  | 133 +++++
>  arch/arm64/kvm/vgic-v3-switch.S                  | 271 +++++++++
>  drivers/irqchip/Kconfig                          |   5 +
>  drivers/irqchip/Makefile                         |   3 +-
>  drivers/irqchip/irq-gic-common.c                 | 115 ++++
>  drivers/irqchip/irq-gic-common.h                 |  29 +
>  drivers/irqchip/irq-gic-v3.c                     | 684 +++++++++++++++++++++++
>  drivers/irqchip/irq-gic.c                        |  59 +-
>  include/kvm/arm_vgic.h                           | 115 +++-
>  include/linux/irqchip/arm-gic-v3.h               | 190 +++++++
>  virt/kvm/arm/vgic-v2.c                           | 236 ++++++++
>  virt/kvm/arm/vgic-v3.c                           | 225 ++++++++
>  virt/kvm/arm/vgic.c                              | 345 ++++++------
>  29 files changed, 2415 insertions(+), 353 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/arm/gic-v3.txt
>  create mode 100644 arch/arm64/kvm/vgic-v2-switch.S
>  create mode 100644 arch/arm64/kvm/vgic-v3-switch.S
>  create mode 100644 drivers/irqchip/irq-gic-common.c
>  create mode 100644 drivers/irqchip/irq-gic-common.h
>  create mode 100644 drivers/irqchip/irq-gic-v3.c
>  create mode 100644 include/linux/irqchip/arm-gic-v3.h
>  create mode 100644 virt/kvm/arm/vgic-v2.c
>  create mode 100644 virt/kvm/arm/vgic-v3.c
>