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bh=EuDOUK3ZK+bXVyO3r9unm7HC+7f6UPPKS0/3jh68/tM=; b=FTjHGMBAAnSZCIwtNXDm+xSu0G2yIxFrlWbaZCt4MkIljBPfjN2U57Jh6fZpX5o7tUoCVx VwBTzp0BjCo7jaRfZ2SR9/SwZfpWdONA1hjB08FbMjQFYbrh0KmegT19oTJOyZPq1+9Jtg QVlKnb/3MGCcK/wfYwnax9O+v5nA8HE= X-MC-Unique: 8_dBPyTfNn2LVwpKgHBZdQ-1 From: Vitaly Kuznetsov To: qemu-devel@nongnu.org Subject: [PATCH v5 09/17] i386: split hyperv_handle_properties() into hyperv_expand_features()/hyperv_fill_cpuids() Date: Mon, 1 Mar 2021 14:50:55 +0100 Message-Id: <20210301135103.306003-10-vkuznets@redhat.com> In-Reply-To: <20210301135103.306003-1-vkuznets@redhat.com> References: <20210301135103.306003-1-vkuznets@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 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=63.128.21.124; envelope-from=vkuznets@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, 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_H4=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" The intention is to call hyperv_expand_features() early, before vCPUs are created and use the acquired data later when we set guest visible CPUID data. Signed-off-by: Vitaly Kuznetsov --- target/i386/kvm/kvm.c | 34 ++++++++++++++++++++++++---------- 1 file changed, 24 insertions(+), 10 deletions(-) diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c index 043d4c84d2d2..ab828df397e8 100644 --- a/target/i386/kvm/kvm.c +++ b/target/i386/kvm/kvm.c @@ -1186,16 +1186,15 @@ static uint32_t hv_build_cpuid_leaf(CPUState *cs, u= int32_t func, int reg) } =20 /* - * 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 - * extentions are enabled. + * Expand Hyper-V CPU features. In partucular, check that all the requested + * features are supported by the host and the sanity of the configuration + * (that all the required dependencies are included). Also, this takes care + * of 'hv_passthrough' mode and fills the environment with all supported + * Hyper-V features. */ -static int hyperv_handle_properties(CPUState *cs, - struct kvm_cpuid_entry2 *cpuid_ent) +static int hyperv_expand_features(CPUState *cs) { X86CPU *cpu =3D X86_CPU(cs); - struct kvm_cpuid_entry2 *c; - uint32_t cpuid_i =3D 0; int r; =20 if (!hyperv_enabled(cpu)) @@ -1294,6 +1293,19 @@ static int hyperv_handle_properties(CPUState *cs, return -ENOSYS; } =20 + return 0; +} + +/* + * Fill in Hyper-V CPUIDs. Returns the number of entries filled in cpuid_e= nt. + */ +static int hyperv_fill_cpuids(CPUState *cs, + struct kvm_cpuid_entry2 *cpuid_ent) +{ + X86CPU *cpu =3D X86_CPU(cs); + struct kvm_cpuid_entry2 *c; + uint32_t cpuid_i =3D 0; + c =3D &cpuid_ent[cpuid_i++]; c->function =3D HV_CPUID_VENDOR_AND_MAX_FUNCTIONS; c->eax =3D hyperv_feat_enabled(cpu, HYPERV_FEAT_EVMCS) ? @@ -1501,11 +1513,13 @@ int kvm_arch_init_vcpu(CPUState *cs) env->apic_bus_freq =3D KVM_APIC_BUS_FREQUENCY; =20 /* Paravirtualization CPUIDs */ - r =3D hyperv_handle_properties(cs, cpuid_data.entries); + r =3D hyperv_expand_features(cs); if (r < 0) { return r; - } else if (r > 0) { - cpuid_i =3D r; + } + + if (hyperv_enabled(cpu)) { + cpuid_i =3D hyperv_fill_cpuids(cs, cpuid_data.entries); kvm_base =3D KVM_CPUID_SIGNATURE_NEXT; has_msr_hv_hypercall =3D true; } --=20 2.29.2