ARM

• ARM firmware pseudo-registers interface
  • Bitmap Feature Firmware Registers
• Internal ABI between the kernel and HYP
• KVM/arm64-specific hypercalls exposed to guests
  • ARM_SMCCC_VENDOR_HYP_KVM_FEATURES_FUNC_ID
  • ARM_SMCCC_VENDOR_HYP_KVM_PTP_FUNC_ID
  • ARM_SMCCC_KVM_FUNC_HYP_MEMINFO
  • ARM_SMCCC_KVM_FUNC_MEM_SHARE
  • ARM_SMCCC_KVM_FUNC_MEM_UNSHARE
  • ARM_SMCCC_KVM_FUNC_MMIO_GUARD
  • ARM_SMCCC_VENDOR_HYP_KVM_DISCOVER_IMPL_VER_FUNC_ID
  • ARM_SMCCC_VENDOR_HYP_KVM_DISCOVER_IMPL_CPUS_FUNC_ID
• Paravirtualized time support for arm64
  • Stolen Time
• PTP_KVM support for arm/arm64
  • ARM_SMCCC_VENDOR_HYP_KVM_PTP_FUNC_ID
• vCPU feature selection on arm64
  • KVM_ARM_VCPU_INIT
  • The ID Registers