On Tue, Oct 9, 2018 at 9:08 AM, Paolo Bonzini <pbonzini@xxxxxxxxxx> wrote:
> On 08/10/2018 20:29, Jim Mattson wrote:
>> diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt
>> index 647f94128a85..2df2cca81cf5 100644
>> --- a/Documentation/virtual/kvm/api.txt
>> +++ b/Documentation/virtual/kvm/api.txt
>> @@ -850,7 +850,7 @@ struct kvm_vcpu_events {
>> __u8 injected;
>> __u8 nr;
>> __u8 has_error_code;
>> - __u8 pad;
>> + __u8 has_payload;
>> __u32 error_code;
>> } exception;
>> struct {
>> @@ -873,9 +873,11 @@ struct kvm_vcpu_events {
>> __u8 smm_inside_nmi;
>> __u8 latched_init;
>> } smi;
>> + __u32 reserved[7];
>> + __u64 exception_payload;
>> };
>
> This changes the size of the struct, and thus the ioctl number. The
> good part is that you don't need the capability, the bad part is that
> you need a struct kvm_vcpu_events2 and ioctl KVM_GET/SET_VCPU_EVENTS2.
It's not in the api.txt file, but there's an existing __u32
reserved[9] in arch/x86/include/uapi/asm/kvm.h.
