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From ad53e96559cfe9d5f1b5518c3c925618e7e1bcc7 Mon Sep 17 00:00:00 2001
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From: Thomas Huth <thuth@redhat.com>
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Date: Wed, 18 Sep 2019 14:35:49 +0100
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Subject: [PATCH 10/22] s390x/cpumodel: Set up CPU model for AQIC interception
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RH-Author: Thomas Huth <thuth@redhat.com>
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Message-id: <20190918143549.16340-3-thuth@redhat.com>
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Patchwork-id: 90760
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O-Subject: [RHEL-8.2.0 qemu-kvm PATCH 2/2] s390x/cpumodel: Set up CPU model for AQIC interception
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Bugzilla: 1660909
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RH-Acked-by: David Hildenbrand <david@redhat.com>
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RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
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RH-Acked-by: Jens Freimann <jfreimann@redhat.com>
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From: Pierre Morel <pmorel@linux.ibm.com>
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Let's add support for the AP-Queue interruption facility to the CPU
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model.
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The S390_FEAT_AP_QUEUE_INTERRUPT_CONTROL, CPU facility indicates
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whether the PQAP instruction with the AQIC command is available
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to the guest.
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This feature will be enabled only if the AP instructions are
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available on the linux host and AQIC facility is installed on
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the host.
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This feature must be turned on from userspace to intercept AP
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instructions on the KVM guest. The QEMU command line to turn
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this feature on looks something like this:
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qemu-system-s390x ... -cpu xxx,apqi=on ...
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or
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... -cpu host
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Right now AP pass-through devices do not support migration,
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which means that we do not have to take care of migrating
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the interrupt data:
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virsh migrate apguest --live qemu+ssh://root@target.lan/system
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error: Requested operation is not valid: domain has assigned non-USB host devices
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Signed-off-by: Pierre Morel <pmorel@linux.ibm.com>
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Reviewed-by: Tony Krowiak <akrowiak@linux.ibm.com>
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Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
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Reviewed-by: Halil Pasic <pasic@linux.ibm.com>
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Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
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[rebase to newest qemu and fixup description]
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Message-Id: <20190705153249.12525-1-borntraeger@de.ibm.com>
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Signed-off-by: Cornelia Huck <cohuck@redhat.com>
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(cherry picked from commit 9ef2d19e5f5dfdebc9877c77951c28f25c74e000)
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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---
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target/s390x/cpu_features_def.inc.h | 1 +
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target/s390x/cpu_models.c | 1 +
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target/s390x/gen-features.c | 1 +
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3 files changed, 3 insertions(+)
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diff --git a/target/s390x/cpu_features_def.inc.h b/target/s390x/cpu_features_def.inc.h
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index 011ce4d..dead061 100644
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--- a/target/s390x/cpu_features_def.inc.h
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+++ b/target/s390x/cpu_features_def.inc.h
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@@ -77,6 +77,7 @@ DEF_FEAT(SEMAPHORE_ASSIST, "sema", STFL, 59, "Semaphore-assist facility")
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DEF_FEAT(TIME_SLICE_INSTRUMENTATION, "tsi", STFL, 60, "Time-slice Instrumentation facility")
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DEF_FEAT(MISC_INSTRUCTION_EXT3, "minste3", STFL, 61, "Miscellaneous-Instruction-Extensions Facility 3")
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DEF_FEAT(RUNTIME_INSTRUMENTATION, "ri", STFL, 64, "CPU runtime-instrumentation facility")
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+DEF_FEAT(AP_QUEUE_INTERRUPT_CONTROL, "apqi", STFL, 65, "AP-Queue interruption facility")
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DEF_FEAT(ZPCI, "zpci", STFL, 69, "z/PCI facility")
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DEF_FEAT(ADAPTER_EVENT_NOTIFICATION, "aen", STFL, 71, "General-purpose-adapter-event-notification facility")
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DEF_FEAT(ADAPTER_INT_SUPPRESSION, "ais", STFL, 72, "General-purpose-adapter-interruption-suppression facility")
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diff --git a/target/s390x/cpu_models.c b/target/s390x/cpu_models.c
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index 91afc6b..f16ef64 100644
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--- a/target/s390x/cpu_models.c
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+++ b/target/s390x/cpu_models.c
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@@ -792,6 +792,7 @@ static void check_consistency(const S390CPUModel *model)
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{ S390_FEAT_PTFF_QTOUE, S390_FEAT_MULTIPLE_EPOCH },
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{ S390_FEAT_PTFF_STOE, S390_FEAT_MULTIPLE_EPOCH },
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{ S390_FEAT_PTFF_STOUE, S390_FEAT_MULTIPLE_EPOCH },
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+ { S390_FEAT_AP_QUEUE_INTERRUPT_CONTROL, S390_FEAT_AP },
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};
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int i;
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diff --git a/target/s390x/gen-features.c b/target/s390x/gen-features.c
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index 24d78e9..17bb04e 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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@@ -519,6 +519,7 @@ static uint16_t full_GEN12_GA1[] = {
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S390_FEAT_EDAT_2,
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S390_FEAT_SIDE_EFFECT_ACCESS_ESOP2,
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S390_FEAT_AP_QUERY_CONFIG_INFO,
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+ S390_FEAT_AP_QUEUE_INTERRUPT_CONTROL,
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S390_FEAT_AP_FACILITIES_TEST,
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S390_FEAT_AP,
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};
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--
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1.8.3.1
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