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target/s390x: AP-passthrough for PV guests

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Enabling AP-passthrough(AP-pt) for PV-guest by using the new CPU
features for PV-AP-pt of KVM.

As usual QEMU first checks which CPU features are available and then
sets them if available and selected by user. An additional check is done
to verify that PV-AP can only be enabled if "regular" AP-pt is enabled
as well. Note that KVM itself does not enforce this restriction.

Reviewed-by: Michael Mueller <mimu@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Steffen Eiden <seiden@linux.ibm.com>
Message-ID: <20230823142219.1046522-6-seiden@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Steffen Eiden 2023-08-23 16:22:19 +02:00 • committed by Thomas Huth
parent 354383c122
commit 5ac951519c
5 changed files with 79 additions and 0 deletions
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2
target/s390x/gen-features.c
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@ -576,6 +576,8 @@ static uint16_t full_GEN16_GA1[] = {
S390_FEAT_RDP,
S390_FEAT_PAI,
S390_FEAT_PAIE,
S390_FEAT_UV_FEAT_AP,
S390_FEAT_UV_FEAT_AP_INTR,
};