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Violators will be prosecuted for from ; Wed, 24 Aug 2016 19:11:16 +0100 Received: from b06cxnps4075.portsmouth.uk.ibm.com (d06relay12.portsmouth.uk.ibm.com [9.149.109.197]) by d06dlp02.portsmouth.uk.ibm.com (Postfix) with ESMTP id 56328219005E for ; Wed, 24 Aug 2016 19:10:36 +0100 (BST) Received: from d06av11.portsmouth.uk.ibm.com (d06av11.portsmouth.uk.ibm.com [9.149.37.252]) by b06cxnps4075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u7OIBCGm49873066 for ; Wed, 24 Aug 2016 18:11:12 GMT Received: from d06av11.portsmouth.uk.ibm.com (localhost [127.0.0.1]) by d06av11.portsmouth.uk.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id u7OIBCPc006360 for ; Wed, 24 Aug 2016 12:11:12 -0600 From: David Hildenbrand Date: Wed, 24 Aug 2016 20:10:47 +0200 In-Reply-To: <1472062266-53206-1-git-send-email-dahi@linux.vnet.ibm.com> References: <1472062266-53206-1-git-send-email-dahi@linux.vnet.ibm.com> Message-Id: <1472062266-53206-12-git-send-email-dahi@linux.vnet.ibm.com> Subject: [Qemu-devel] [Patch v3 11/30] s390x/cpumodel: let the CPU model handle feature checks List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: ehabkost@redhat.com, jdenemar@redhat.com, imammedo@redhat.com, cornelia.huck@de.ibm.com, borntraeger@de.ibm.com, fiuczy@linux.vnet.ibm.com, mimu@linux.vnet.ibm.com If we have certain features enabled, we have to migrate additional state (e.g. vector registers or runtime-instrumentation registers). Let the CPU model control that unless we have no "host" CPU model in the KVM case. This will later on be the case for compatibility machines, so migration from QEMU versions without the CPU model will still work. Acked-by: Cornelia Huck Signed-off-by: David Hildenbrand --- target-s390x/cpu_models.c | 25 +++++++++++++++++++++++++ target-s390x/cpu_models.h | 2 ++ target-s390x/kvm.c | 4 ++-- target-s390x/machine.c | 14 ++------------ 4 files changed, 31 insertions(+), 14 deletions(-) diff --git a/target-s390x/cpu_models.c b/target-s390x/cpu_models.c index 75c3099..946b565 100644 --- a/target-s390x/cpu_models.c +++ b/target-s390x/cpu_models.c @@ -73,6 +73,31 @@ static const S390CPUDef s390_cpu_defs[] = { CPUDEF_INIT(0x2965, 13, 2, 47, 0x08000000U, "z13s", "IBM z13s GA1"), }; +bool s390_has_feat(S390Feat feat) +{ + static S390CPU *cpu; + + if (!cpu) { + cpu = S390_CPU(qemu_get_cpu(0)); + } + + if (!cpu || !cpu->model) { +#ifdef CONFIG_KVM + if (kvm_enabled()) { + if (feat == S390_FEAT_VECTOR) { + return kvm_check_extension(kvm_state, + KVM_CAP_S390_VECTOR_REGISTERS); + } + if (feat == S390_FEAT_RUNTIME_INSTRUMENTATION) { + return kvm_s390_get_ri(); + } + } +#endif + return 0; + } + return test_bit(feat, cpu->model->features); +} + struct S390PrintCpuListInfo { FILE *f; fprintf_function print; diff --git a/target-s390x/cpu_models.h b/target-s390x/cpu_models.h index 244256b..fe988cc 100644 --- a/target-s390x/cpu_models.h +++ b/target-s390x/cpu_models.h @@ -43,4 +43,6 @@ typedef struct S390CPUModel { uint8_t cpu_ver; /* CPU version, usually "ff" for kvm */ } S390CPUModel; +bool s390_has_feat(S390Feat feat); + #endif /* TARGET_S390X_CPU_MODELS_H */ diff --git a/target-s390x/kvm.c b/target-s390x/kvm.c index 80ac621..55bf6d7 100644 --- a/target-s390x/kvm.c +++ b/target-s390x/kvm.c @@ -1517,7 +1517,7 @@ static void sigp_store_adtl_status(void *arg) { SigpInfo *si = arg; - if (!kvm_check_extension(kvm_state, KVM_CAP_S390_VECTOR_REGISTERS)) { + if (!s390_has_feat(S390_FEAT_VECTOR)) { set_sigp_status(si, SIGP_STAT_INVALID_ORDER); return; } @@ -2089,7 +2089,7 @@ static uint64_t build_channel_report_mcic(void) MCIC_VB_WP | MCIC_VB_MS | MCIC_VB_PM | MCIC_VB_IA | MCIC_VB_FP | MCIC_VB_GR | MCIC_VB_CR | MCIC_VB_ST | MCIC_VB_AR | MCIC_VB_PR | MCIC_VB_FC | MCIC_VB_CT | MCIC_VB_CC; - if (kvm_check_extension(kvm_state, KVM_CAP_S390_VECTOR_REGISTERS)) { + if (s390_has_feat(S390_FEAT_VECTOR)) { mcic |= MCIC_VB_VR; } return mcic; diff --git a/target-s390x/machine.c b/target-s390x/machine.c index aa39e5d..edc3a47 100644 --- a/target-s390x/machine.c +++ b/target-s390x/machine.c @@ -78,12 +78,7 @@ static const VMStateDescription vmstate_fpu = { static bool vregs_needed(void *opaque) { -#ifdef CONFIG_KVM - if (kvm_enabled()) { - return kvm_check_extension(kvm_state, KVM_CAP_S390_VECTOR_REGISTERS); - } -#endif - return 0; + return s390_has_feat(S390_FEAT_VECTOR); } static const VMStateDescription vmstate_vregs = { @@ -147,12 +142,7 @@ static const VMStateDescription vmstate_vregs = { static bool riccb_needed(void *opaque) { -#ifdef CONFIG_KVM - if (kvm_enabled()) { - return kvm_s390_get_ri(); - } -#endif - return 0; + return s390_has_feat(S390_FEAT_RUNTIME_INSTRUMENTATION); } const VMStateDescription vmstate_riccb = { -- 2.6.6