[PATCH v2 00/20] KVM: arm64: vgic-v3 userspace access consolidation (and other goodies)

[Marc Zyngier]

This is a follow-up to [1], which aims a performing a bunch of
cleanups in the way we expose sysregs to userspace, with a particular
focus on the GICv3 part of that code.

* From v1:
  - A couple of extra cleanups thanks to Reiji's comments
  - A fix for the breakage of the legacy GICv2 address setup
  - Collected RBs from Reiji and Oliver, with thanks.

[1] https://lore.kernel.org/r/20220706164304.1582687-1-maz@kernel.org

Marc Zyngier (20):
  KVM: arm64: Add get_reg_by_id() as a sys_reg_desc retrieving helper
  KVM: arm64: Reorder handling of invariant sysregs from userspace
  KVM: arm64: Introduce generic get_user/set_user helpers for system
    registers
  KVM: arm64: Rely on index_to_param() for size checks on userspace
    access
  KVM: arm64: Consolidate sysreg userspace accesses
  KVM: arm64: Get rid of reg_from/to_user()
  KVM: arm64: vgic-v3: Simplify vgic_v3_has_cpu_sysregs_attr()
  KVM: arm64: vgic-v3: Push user access into
    vgic_v3_cpu_sysregs_uaccess()
  KVM: arm64: vgic-v3: Make the userspace accessors use sysreg API
  KVM: arm64: vgic-v3: Convert userspace accessors over to
    FIELD_GET/FIELD_PREP
  KVM: arm64: vgic-v3: Use u32 to manage the line level from userspace
  KVM: arm64: vgic-v3: Consolidate userspace access for MMIO registers
  KVM: arm64: vgic-v2: Consolidate userspace access for MMIO registers
  KVM: arm64: vgic: Use {get,put}_user() instead of copy_{from.to}_user
  KVM: arm64: vgic-v2: Add helper for legacy dist/cpuif base address
    setting
  KVM: arm64: vgic: Consolidate userspace access for base address
    setting
  KVM: arm64: vgic: Tidy-up calls to vgic_{get,set}_common_attr()
  KVM: arm64: Get rid of find_reg_by_id()
  KVM: arm64: Descope kvm_arm_sys_reg_{get,set}_reg()
  KVM: arm64: Get rid or outdated comments

 arch/arm64/include/asm/kvm_host.h     |   2 -
 arch/arm64/kvm/arm.c                  |  11 +-
 arch/arm64/kvm/sys_regs.c             | 282 +++++++---------
 arch/arm64/kvm/sys_regs.h             |  18 +-
 arch/arm64/kvm/vgic-sys-reg-v3.c      | 462 +++++++++++++++-----------
 arch/arm64/kvm/vgic/vgic-kvm-device.c | 342 ++++++++-----------
 arch/arm64/kvm/vgic/vgic-mmio-v3.c    |  10 +-
 arch/arm64/kvm/vgic/vgic-mmio.c       |   6 +-
 arch/arm64/kvm/vgic/vgic-mmio.h       |   4 +-
 arch/arm64/kvm/vgic/vgic.h            |   9 +-
 include/kvm/arm_vgic.h                |   2 +-
 11 files changed, 547 insertions(+), 601 deletions(-)

-- 
2.34.1