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bh=K9MalvRvjNl7tyx7hR6kLTF/OXiMsZXKGHI5UOIPEs8=; b=a4/75NC+4JEf4V/wIHfBgTWHF4QP/fy8e4G7X96l9EzSh8eToqJc6fmyPJoeC0mlKwCGlS BvMgBEbbYdGP1VHpPtggVR0Y2WIwp/FblBdANdW1Mrg4Z5vKUtoJvyeAVs7+IzckoUV24D 16c3aqcfWazsfUL0OQx2oI4Awq7ryJE= X-MC-Unique: f04Emq1lPFKu3z8_6OAsBg-1 From: Vitaly Kuznetsov To: qemu-devel@nongnu.org Subject: [PATCH v3 06/19] i386: stop using env->features[] for filling Hyper-V CPUIDs Date: Thu, 7 Jan 2021 16:06:27 +0100 Message-Id: <20210107150640.539239-7-vkuznets@redhat.com> In-Reply-To: <20210107150640.539239-1-vkuznets@redhat.com> References: <20210107150640.539239-1-vkuznets@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=vkuznets@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=216.205.24.124; envelope-from=vkuznets@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -29 X-Spam_score: -3.0 X-Spam_bar: --- X-Spam_report: (-3.0 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.246, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Paolo Bonzini , Marcelo Tosatti , Eduardo Habkost , Igor Mammedov Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" As a preparatory patch to dropping Hyper-V CPUID leaves from feature_word_info[] stop using env->features[] as a temporary storage of Hyper-V CPUIDs, just build Hyper-V CPUID leaves directly from kvm_hyperv_properties[] data. Signed-off-by: Vitaly Kuznetsov --- target/i386/cpu.h | 1 + target/i386/kvm/kvm.c | 80 +++++++++++++++++++++++-------------------- 2 files changed, 43 insertions(+), 38 deletions(-) diff --git a/target/i386/cpu.h b/target/i386/cpu.h index af130512e220..a9fab5adbdfb 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -1667,6 +1667,7 @@ struct X86CPU { uint32_t hyperv_interface_id[4]; uint32_t hyperv_version_id[4]; uint32_t hyperv_limits[3]; + uint32_t hyperv_nested[4]; =20 bool check_cpuid; bool enforce_cpuid; diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c index 4a85d62bdaad..768e08fa5e8f 100644 --- a/target/i386/kvm/kvm.c +++ b/target/i386/kvm/kvm.c @@ -1114,7 +1114,6 @@ static int hv_cpuid_check_and_set(CPUState *cs, struc= t kvm_cpuid2 *cpuid, int feature) { X86CPU *cpu =3D X86_CPU(cs); - CPUX86State *env =3D &cpu->env; uint32_t r, fw, bits; uint64_t deps; int i, dep_feat; @@ -1154,8 +1153,6 @@ static int hv_cpuid_check_and_set(CPUState *cs, struc= t kvm_cpuid2 *cpuid, return 0; } } - - env->features[fw] |=3D bits; } =20 if (cpu->hyperv_passthrough) { @@ -1165,6 +1162,29 @@ static int hv_cpuid_check_and_set(CPUState *cs, stru= ct kvm_cpuid2 *cpuid, return 0; } =20 +static uint32_t hv_build_cpuid_leaf(CPUState *cs, uint32_t fw) +{ + X86CPU *cpu =3D X86_CPU(cs); + uint32_t r =3D 0; + int i, j; + + for (i =3D 0; i < ARRAY_SIZE(kvm_hyperv_properties); i++) { + if (!hyperv_feat_enabled(cpu, i)) { + continue; + } + + for (j =3D 0; j < ARRAY_SIZE(kvm_hyperv_properties[i].flags); j++)= { + if (kvm_hyperv_properties[i].flags[j].fw !=3D fw) { + continue; + } + + r |=3D kvm_hyperv_properties[i].flags[j].bits; + } + } + + return r; +} + /* * Fill in Hyper-V CPUIDs. Returns the number of entries filled in cpuid_e= nt in * case of success, errno < 0 in case of failure and 0 when no Hyper-V @@ -1174,9 +1194,8 @@ static int hyperv_handle_properties(CPUState *cs, struct kvm_cpuid_entry2 *cpuid_ent) { X86CPU *cpu =3D X86_CPU(cs); - CPUX86State *env =3D &cpu->env; struct kvm_cpuid2 *cpuid; - struct kvm_cpuid_entry2 *c; + struct kvm_cpuid_entry2 *c, *c2; uint32_t cpuid_i =3D 0; int r; =20 @@ -1197,9 +1216,7 @@ static int hyperv_handle_properties(CPUState *cs, } =20 if (!r) { - env->features[FEAT_HV_RECOMM_EAX] |=3D - HV_ENLIGHTENED_VMCS_RECOMMENDED; - env->features[FEAT_HV_NESTED_EAX] =3D evmcs_version; + cpu->hyperv_nested[0] =3D evmcs_version; } } =20 @@ -1237,13 +1254,6 @@ static int hyperv_handle_properties(CPUState *cs, cpu->hyperv_version_id[3] =3D c->edx; } =20 - c =3D cpuid_find_entry(cpuid, HV_CPUID_FEATURES, 0); - if (c) { - env->features[FEAT_HYPERV_EAX] =3D c->eax; - env->features[FEAT_HYPERV_EBX] =3D c->ebx; - env->features[FEAT_HYPERV_EDX] =3D c->edx; - } - c =3D cpuid_find_entry(cpuid, HV_CPUID_IMPLEMENT_LIMITS, 0); if (c) { cpu->hv_max_vps =3D c->eax; @@ -1254,23 +1264,8 @@ static int hyperv_handle_properties(CPUState *cs, =20 c =3D cpuid_find_entry(cpuid, HV_CPUID_ENLIGHTMENT_INFO, 0); if (c) { - env->features[FEAT_HV_RECOMM_EAX] =3D c->eax; cpu->hyperv_spinlock_attempts =3D c->ebx; } - c =3D cpuid_find_entry(cpuid, HV_CPUID_NESTED_FEATURES, 0); - if (c) { - env->features[FEAT_HV_NESTED_EAX] =3D c->eax; - } - } - - if (cpu->hyperv_no_nonarch_cs =3D=3D ON_OFF_AUTO_ON) { - env->features[FEAT_HV_RECOMM_EAX] |=3D HV_NO_NONARCH_CORESHARING; - } else if (cpu->hyperv_no_nonarch_cs =3D=3D ON_OFF_AUTO_AUTO) { - c =3D cpuid_find_entry(cpuid, HV_CPUID_ENLIGHTMENT_INFO, 0); - if (c) { - env->features[FEAT_HV_RECOMM_EAX] |=3D - c->eax & HV_NO_NONARCH_CORESHARING; - } } =20 /* Features */ @@ -1300,9 +1295,6 @@ static int hyperv_handle_properties(CPUState *cs, r |=3D 1; } =20 - /* Not exposed by KVM but needed to make CPU hotplug in Windows work */ - env->features[FEAT_HYPERV_EDX] |=3D HV_CPU_DYNAMIC_PARTITIONING_AVAILA= BLE; - if (r) { r =3D -ENOSYS; goto free; @@ -1332,15 +1324,27 @@ static int hyperv_handle_properties(CPUState *cs, =20 c =3D &cpuid_ent[cpuid_i++]; c->function =3D HV_CPUID_FEATURES; - c->eax =3D env->features[FEAT_HYPERV_EAX]; - c->ebx =3D env->features[FEAT_HYPERV_EBX]; - c->edx =3D env->features[FEAT_HYPERV_EDX]; + c->eax =3D hv_build_cpuid_leaf(cs, FEAT_HYPERV_EAX); + c->ebx =3D hv_build_cpuid_leaf(cs, FEAT_HYPERV_EBX); + c->edx =3D hv_build_cpuid_leaf(cs, FEAT_HYPERV_EDX); + + /* Not exposed by KVM but needed to make CPU hotplug in Windows work */ + c->edx |=3D HV_CPU_DYNAMIC_PARTITIONING_AVAILABLE; =20 c =3D &cpuid_ent[cpuid_i++]; c->function =3D HV_CPUID_ENLIGHTMENT_INFO; - c->eax =3D env->features[FEAT_HV_RECOMM_EAX]; + c->eax =3D hv_build_cpuid_leaf(cs, FEAT_HV_RECOMM_EAX); c->ebx =3D cpu->hyperv_spinlock_attempts; =20 + if (cpu->hyperv_no_nonarch_cs =3D=3D ON_OFF_AUTO_ON) { + c->eax |=3D HV_NO_NONARCH_CORESHARING; + } else if (cpu->hyperv_no_nonarch_cs =3D=3D ON_OFF_AUTO_AUTO) { + c2 =3D cpuid_find_entry(cpuid, HV_CPUID_ENLIGHTMENT_INFO, 0); + if (c2) { + c->eax |=3D c2->eax & HV_NO_NONARCH_CORESHARING; + } + } + c =3D &cpuid_ent[cpuid_i++]; c->function =3D HV_CPUID_IMPLEMENT_LIMITS; c->eax =3D cpu->hv_max_vps; @@ -1360,7 +1364,7 @@ static int hyperv_handle_properties(CPUState *cs, =20 c =3D &cpuid_ent[cpuid_i++]; c->function =3D HV_CPUID_NESTED_FEATURES; - c->eax =3D env->features[FEAT_HV_NESTED_EAX]; + c->eax =3D cpu->hyperv_nested[0]; } r =3D cpuid_i; =20 --=20 2.29.2