On 3/4/20 12:42 PM, Janosch Frank wrote: > From: Christian Borntraeger <borntrae...@de.ibm.com> > > The unpack facility is an indication that diagnose 308 subcodes 8-10 > are available to the guest. That means, that the guest can put itself > into protected mode. > > Once it is in protected mode, the hardware stops any attempt of VM > introspection by the hypervisor. > > Some features are currently not supported in protected mode: > * Passthrough devices > * Migration > * Huge page backings > > Signed-off-by: Christian Borntraeger <borntrae...@de.ibm.com>
This one will be the first patch (after sync) and will also get the
DEF_FEAT definition, so I can use it in the diag 308 8-10 patch
> ---
> target/s390x/gen-features.c | 1 +
> target/s390x/kvm.c | 5 +++++
> 2 files changed, 6 insertions(+)
>
> diff --git a/target/s390x/gen-features.c b/target/s390x/gen-features.c
> index 6278845b12..8ddeebc544 100644
> --- a/target/s390x/gen-features.c
> +++ b/target/s390x/gen-features.c
> @@ -562,6 +562,7 @@ static uint16_t full_GEN15_GA1[] = {
> S390_FEAT_GROUP_MSA_EXT_9,
> S390_FEAT_GROUP_MSA_EXT_9_PCKMO,
> S390_FEAT_ETOKEN,
> + S390_FEAT_UNPACK,
> };
>
> /* Default features (in order of release)
> diff --git a/target/s390x/kvm.c b/target/s390x/kvm.c
> index a4cbdc5fc6..bf807793bc 100644
> --- a/target/s390x/kvm.c
> +++ b/target/s390x/kvm.c
> @@ -2396,6 +2396,11 @@ void kvm_s390_get_host_cpu_model(S390CPUModel *model,
> Error **errp)
> clear_bit(S390_FEAT_BPB, model->features);
> }
>
> + /* we do have the IPL enhancements */
> + if (cap_protected) {
> + set_bit(S390_FEAT_UNPACK, model->features);
> + }
> +
> /* We emulate a zPCI bus and AEN, therefore we don't need HW support */
> set_bit(S390_FEAT_ZPCI, model->features);
> set_bit(S390_FEAT_ADAPTER_EVENT_NOTIFICATION, model->features);
>
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