62 lines
2.2 KiB
Diff
62 lines
2.2 KiB
Diff
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From: Christian Borntraeger <borntraeger@de.ibm.com>
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Date: Tue, 25 Feb 2020 06:28:51 -0500
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Subject: s390x: Add unpack facility feature to GA1
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References: bsc#1167075
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The unpack facility is an indication that diagnose 308 subcodes 8-10
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are available to the guest. That means, that the guest can put itself
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into protected mode.
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Once it is in protected mode, the hardware stops any attempt of VM
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introspection by the hypervisor.
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Some features are currently not supported in protected mode:
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* vfio devices
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* Migration
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* Huge page backings
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Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
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Reviewed-by: David Hildenbrand <david@redhat.com>
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Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
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Reviewed-by: Cornelia Huck <cohuck@redhat.com>
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Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
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(cherry picked from commit 3034eaac3b2970ba85a1d77814ceef1352d05357)
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Signed-off-by: Bruce Rogers <brogers@suse.com>
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---
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target/s390x/gen-features.c | 1 +
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target/s390x/kvm.c | 8 ++++++++
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2 files changed, 9 insertions(+)
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diff --git a/target/s390x/gen-features.c b/target/s390x/gen-features.c
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index 6278845b12b8dee84c086413c60a..8ddeebc54419a3e2481e21916389 100644
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--- a/target/s390x/gen-features.c
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+++ b/target/s390x/gen-features.c
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@@ -562,6 +562,7 @@ static uint16_t full_GEN15_GA1[] = {
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S390_FEAT_GROUP_MSA_EXT_9,
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S390_FEAT_GROUP_MSA_EXT_9_PCKMO,
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S390_FEAT_ETOKEN,
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+ S390_FEAT_UNPACK,
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};
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/* Default features (in order of release)
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diff --git a/target/s390x/kvm.c b/target/s390x/kvm.c
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index d94b915da419c3ad0a1f9622ca13..8b82e4c93dfa7e89127bce74cde7 100644
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--- a/target/s390x/kvm.c
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+++ b/target/s390x/kvm.c
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@@ -2407,6 +2407,14 @@ void kvm_s390_get_host_cpu_model(S390CPUModel *model, Error **errp)
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clear_bit(S390_FEAT_BPB, model->features);
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}
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+ /*
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+ * If we have support for protected virtualization, indicate
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+ * the protected virtualization IPL unpack facility.
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+ */
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+ if (cap_protected) {
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+ set_bit(S390_FEAT_UNPACK, model->features);
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+ }
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+
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/* We emulate a zPCI bus and AEN, therefore we don't need HW support */
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set_bit(S390_FEAT_ZPCI, model->features);
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set_bit(S390_FEAT_ADAPTER_EVENT_NOTIFICATION, model->features);
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