From 9ef2d19e5f5dfdebc9877c77951c28f25c74e000 Mon Sep 17 00:00:00 2001 From: Pierre Morel Date: Fri, 5 Jul 2019 17:32:49 +0200 Subject: [PATCH] s390x/cpumodel: Set up CPU model for AQIC interception Let's add support for the AP-Queue interruption facility to the CPU model. The S390_FEAT_AP_QUEUE_INTERRUPT_CONTROL, CPU facility indicates whether the PQAP instruction with the AQIC command is available to the guest. This feature will be enabled only if the AP instructions are available on the linux host and AQIC facility is installed on the host. This feature must be turned on from userspace to intercept AP instructions on the KVM guest. The QEMU command line to turn this feature on looks something like this: qemu-system-s390x ... -cpu xxx,apqi=on ... or ... -cpu host Right now AP pass-through devices do not support migration, which means that we do not have to take care of migrating the interrupt data: virsh migrate apguest --live qemu+ssh://root@target.lan/system error: Requested operation is not valid: domain has assigned non-USB host devices Signed-off-by: Pierre Morel Reviewed-by: Tony Krowiak Reviewed-by: Christian Borntraeger Reviewed-by: Halil Pasic Signed-off-by: Christian Borntraeger [rebase to newest qemu and fixup description] Message-Id: <20190705153249.12525-1-borntraeger@de.ibm.com> Signed-off-by: Cornelia Huck --- target/s390x/cpu_features_def.inc.h | 1 + target/s390x/cpu_models.c | 1 + target/s390x/gen-features.c | 1 + 3 files changed, 3 insertions(+) diff --git a/target/s390x/cpu_features_def.inc.h b/target/s390x/cpu_features_def.inc.h index c20c780f2e..ef190e2fc7 100644 --- a/target/s390x/cpu_features_def.inc.h +++ b/target/s390x/cpu_features_def.inc.h @@ -77,6 +77,7 @@ DEF_FEAT(SEMAPHORE_ASSIST, "sema", STFL, 59, "Semaphore-assist facility") DEF_FEAT(TIME_SLICE_INSTRUMENTATION, "tsi", STFL, 60, "Time-slice Instrumentation facility") DEF_FEAT(MISC_INSTRUCTION_EXT3, "minste3", STFL, 61, "Miscellaneous-Instruction-Extensions Facility 3") DEF_FEAT(RUNTIME_INSTRUMENTATION, "ri", STFL, 64, "CPU runtime-instrumentation facility") +DEF_FEAT(AP_QUEUE_INTERRUPT_CONTROL, "apqi", STFL, 65, "AP-Queue interruption facility") DEF_FEAT(ZPCI, "zpci", STFL, 69, "z/PCI facility") DEF_FEAT(ADAPTER_EVENT_NOTIFICATION, "aen", STFL, 71, "General-purpose-adapter-event-notification facility") DEF_FEAT(ADAPTER_INT_SUPPRESSION, "ais", STFL, 72, "General-purpose-adapter-interruption-suppression facility") diff --git a/target/s390x/cpu_models.c b/target/s390x/cpu_models.c index 2cb09c0780..1d16d7d5e7 100644 --- a/target/s390x/cpu_models.c +++ b/target/s390x/cpu_models.c @@ -818,6 +818,7 @@ static void check_consistency(const S390CPUModel *model) { S390_FEAT_PTFF_QTOUE, S390_FEAT_MULTIPLE_EPOCH }, { S390_FEAT_PTFF_STOE, S390_FEAT_MULTIPLE_EPOCH }, { S390_FEAT_PTFF_STOUE, S390_FEAT_MULTIPLE_EPOCH }, + { S390_FEAT_AP_QUEUE_INTERRUPT_CONTROL, S390_FEAT_AP }, }; int i; diff --git a/target/s390x/gen-features.c b/target/s390x/gen-features.c index af06be3e3b..9f216219ff 100644 --- a/target/s390x/gen-features.c +++ b/target/s390x/gen-features.c @@ -519,6 +519,7 @@ static uint16_t full_GEN12_GA1[] = { S390_FEAT_EDAT_2, S390_FEAT_SIDE_EFFECT_ACCESS_ESOP2, S390_FEAT_AP_QUERY_CONFIG_INFO, + S390_FEAT_AP_QUEUE_INTERRUPT_CONTROL, S390_FEAT_AP_FACILITIES_TEST, S390_FEAT_AP, };