Messages in this thread Patch in this message | | | From | David Edmondson <> | Subject | [PATCH v6 1/4] KVM: x86: Clarify the kvm_run.emulation_failure structure layout | Date | Mon, 20 Sep 2021 11:37:34 +0100 |
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Until more flags for kvm_run.emulation_failure flags are defined, it is undetermined whether new payload elements corresponding to those flags will be additive or alternative. As a hint to userspace that an alternative is possible, wrap the current payload elements in a union.
Suggested-by: Sean Christopherson <seanjc@google.com> Signed-off-by: David Edmondson <david.edmondson@oracle.com> --- include/uapi/linux/kvm.h | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index a067410ebea5..8618fe973215 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -402,8 +402,12 @@ struct kvm_run { __u32 suberror; __u32 ndata; __u64 flags; - __u8 insn_size; - __u8 insn_bytes[15]; + union { + struct { + __u8 insn_size; + __u8 insn_bytes[15]; + }; + }; } emulation_failure; /* KVM_EXIT_OSI */ struct { -- 2.33.0
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