[v2,0/2] KVM: x86: guest interface for SEV live migration

Message

Paolo Bonzini April 21, 2021, 5:37 p.m. UTC

This is a reviewed version of the guest interface (hypercall+MSR)
for SEV live migration.  The differences lie mostly in the API
for userspace.  In particular:

- the CPUID feature is not exposed in KVM_GET_SUPPORTED_CPUID

- the hypercall must be enabled manually with KVM_ENABLE_CAP

- the MSR has sensible behavior if not filtered (reads as zero,
  writes must leave undefined bits as zero or they #GP)

v1->v2: reviewed KVM_CAP_EXIT_HYPERCALL semantics,
	split CPUID bits so that the migration control MSR
	can be used for TDX

Ashish Kalra (1):
  KVM: X86: Introduce KVM_HC_PAGE_ENC_STATUS hypercall

Paolo Bonzini (1):
  KVM: x86: add MSR_KVM_MIGRATION_CONTROL

 Documentation/virt/kvm/api.rst        | 19 ++++++++++
 Documentation/virt/kvm/cpuid.rst      |  9 +++++
 Documentation/virt/kvm/hypercalls.rst | 15 ++++++++
 Documentation/virt/kvm/msr.rst        | 10 ++++++
 arch/x86/include/asm/kvm_host.h       |  2 ++
 arch/x86/include/uapi/asm/kvm_para.h  |  5 +++
 arch/x86/kvm/cpuid.c                  |  3 +-
 arch/x86/kvm/x86.c                    | 50 +++++++++++++++++++++++++++
 include/uapi/linux/kvm.h              |  1 +
 include/uapi/linux/kvm_para.h         |  1 +
 10 files changed, 114 insertions(+), 1 deletion(-)