[RFC,v5,kvmtool,0/4] arm64: KVM SPE support

Message

Alexandru Elisei Nov. 17, 2021, 3:43 p.m. UTC

This series adds userspace support for creating a guest which can use SPE.
It requires KVM SPE support which is in the RFC phase, hence why this
series is also RFC. The kvmtool patches can also be found at [1], and the
KVM SPE patches can be found at [2].

To create a guest with SPE support the following steps must be executed:

1. Set the SPE virtual interrupt ID and then initialize the features on
every VCPU.

2. After the guest memory memslots have been created and SPE initialized,
kvmtool will lock the memslot memory using the newly introduced capability.

The first patch is a simple update to the Linux headers; the next two
patches are preparatory patches. SPE support is added in patch number 4.

Changes since v4:

* Removed KVM_ARM_VCPU_SUPPORTED_CPUS ioctl.

[1] https://gitlab.arm.com/linux-arm/kvmtool-ae/-/tree/kvm-spe-v5
[2] https://gitlab.arm.com/linux-arm/linux-ae/-/tree/kvm-spe-v5

Alexandru Elisei (3):
  update_headers: Sync KVM UAPI headers with KVM SPE implementation
  arm/arm64: Make kvm__arch_delete_ram() aarch32/aarch64 specific
  init: Add last_{init, exit} list macros

Sudeep Holla (1):
  arm64: Add SPE support

 Makefile                                  |   2 +
 arm/aarch32/kvm.c                         |   8 +
 arm/aarch64/arm-cpu.c                     |   2 +
 arm/aarch64/include/asm/kvm.h             |  67 +++-
 arm/aarch64/include/kvm/kvm-config-arch.h |   2 +
 arm/aarch64/include/kvm/spe.h             |   7 +
 arm/aarch64/kvm-cpu.c                     |   5 +
 arm/aarch64/kvm.c                         |  19 +
 arm/aarch64/spe.c                         | 129 +++++++
 arm/include/arm-common/kvm-config-arch.h  |   1 +
 arm/kvm-cpu.c                             |   4 +
 arm/kvm.c                                 |   5 -
 include/kvm/util-init.h                   |   6 +-
 include/linux/kvm.h                       | 450 +++++++++++++++++++++-
 powerpc/include/asm/kvm.h                 |  10 +
 x86/include/asm/kvm.h                     |  64 ++-
 16 files changed, 760 insertions(+), 21 deletions(-)
 create mode 100644 arm/aarch32/kvm.c
 create mode 100644 arm/aarch64/include/kvm/spe.h
 create mode 100644 arm/aarch64/spe.c