kvm: x86: Add exception payload fields to kvm_vcpu_events
authorJim Mattson <jmattson@google.com>
Tue, 16 Oct 2018 21:29:20 +0000 (14:29 -0700)
committerPaolo Bonzini <pbonzini@redhat.com>
Wed, 17 Oct 2018 17:07:38 +0000 (19:07 +0200)
commit59073aaf6de0d2dacc2603cee6d1d6cd5592ac08
tree2e8d024ce9d6c72019b4ea73d01a811bf039e5b8
parentc851436a34cad09388f1303e11ccb6b9420e5692
kvm: x86: Add exception payload fields to kvm_vcpu_events

The per-VM capability KVM_CAP_EXCEPTION_PAYLOAD (to be introduced in a
later commit) adds the following fields to struct kvm_vcpu_events:
exception_has_payload, exception_payload, and exception.pending.

With this capability set, all of the details of vcpu->arch.exception,
including the payload for a pending exception, are reported to
userspace in response to KVM_GET_VCPU_EVENTS.

With this capability clear, the original ABI is preserved, and the
exception.injected field is set for either pending or injected
exceptions.

When userspace calls KVM_SET_VCPU_EVENTS with
KVM_CAP_EXCEPTION_PAYLOAD clear, exception.injected is no longer
translated to exception.pending. KVM_SET_VCPU_EVENTS can now only
establish a pending exception when KVM_CAP_EXCEPTION_PAYLOAD is set.

Reported-by: Jim Mattson <jmattson@google.com>
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Documentation/virtual/kvm/api.txt
arch/x86/include/asm/kvm_host.h
arch/x86/include/uapi/asm/kvm.h
arch/x86/kvm/x86.c
tools/arch/x86/include/uapi/asm/kvm.h