Re: [PATCH v8 00/15] KVM/ARM Implementation

[Marcelo Tosatti <mtosatti@redhat.com>]

On Fri, Jun 15, 2012 at 03:06:39PM -0400, Christoffer Dall wrote:
> The following series implements KVM support for ARM processors,
> specifically on the Cortex A-15 platform.  Work is done in
> collaboration between Columbia University, Virtual Open Systems and
> ARM/Linaro.
> 
> The patch series applies to kvm/next, specifically commit:
> 25e531a988ea5a64bd97a72dc9d3c65ad5850120
> 
> This is Version 8 of the patch series, but the first two versions
> were reviewed outside of the KVM mailing list. Changes can also be
> pulled from:
>  git://github.com/virtualopensystems/linux-kvm-arm.git kvm-a15-v8
> 
> A non-flattened edition of the patch series can be found at:
>  git://github.com/virtualopensystems/linux-kvm-arm.git kvm-a15-v8-stage
> 
> The implementation is broken up into a logical set of patches, the first
> four are preparatory patches:
>  1. Add mem_type prot_pte accessor (ARM community)
>  2. Use KVM_CAP_IRQ_ROUTING to protect routing code  (KVM community)
>  3. Introduce __KVM_HAVE_IRQ_LINE (KVM community)
>  4. Guard code with CONFIG_MMU_NOTIFIER (KVM community)
> 
> KVM guys, please consider pulling the KVM generic patches as early as
> possible. Thanks.
> 
> The main implementation is broken up into separate patches, the first
> containing a skeleton of files, makefile changes, the basic user space
> interface and KVM architecture specific stubs.  Subsequent patches
> implement parts of the system as listed:
>  1.  Preparatory patch introducing __KVM_HAVE_IRQ_LINE
>  2.  Preparatory patch guarding mmu_notifier code with CONFIG_MMU_NOTIFIER
>  3.  Skeleton
>  4.  Identity Mapping for Hyp mode
>  5.  Hypervisor initialization
>  6.  Hypervisor module unloading
>  7.  Memory virtualization setup (hyp mode mappings and 2nd stage)
>  8.  Inject IRQs and FIQs from userspace
>  9.  World-switch implementation and Hyp exception vectors
>  10. Emulation framework and CP15 emulation
>  11. Handle guest user memory aborts
>  12. Handle guest MMIO aborts
>  13. Support guest wait-for-interrupt instructions
> 
> Testing:
> Limited testing, but have run GCC inside guest, which compiled a small
> hello-world program, which was successfully run. For v8 both ARM/Thumb-2
> kernels were tested as both host/guest and both a compiled-in version
> and a kernel module version of KVM was tested. Hardware still
> unavailable to me, so all testing has been done on ARM Fast Models.
> 
> For a guide on how to set up a testing environment and try out these
> patches, see:
>  http://www.virtualopensystems.com/media/pdf/kvm-arm-guide.pdf
> 
> There is an issue list available using the issue tracker on:
> https://github.com/virtualopensystems/linux-kvm-arm

Is there public documentation for "hyp-mode" available?