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bh=T8extoD+E5w+3LujEzEz7dnEvzka12n48Txjn2DwjzY=; b=aayPlU2UBt8XVchrA4G6/ET4Uxe3AXlOIhR5yQCvLAu2TPKQRM0/dfXk15spJn8RRL7ojJ uRinmuPb4Ks7yEIv82QFk+w6nsfzo2jV9/Zgrq9dVqOjmfFjRHXEPefq20oCdKXUdldkiB x8igW+yHv4oaFcVnuwTxFxqOGsApAWI= X-MC-Unique: JxjnaZpeNFu4QSJSFsCfcg-1 From: Vitaly Kuznetsov To: qemu-devel@nongnu.org Subject: [PATCH v3 07/19] i386: introduce hyperv_feature_supported() Date: Thu, 7 Jan 2021 16:06:28 +0100 Message-Id: <20210107150640.539239-8-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=63.128.21.124; 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_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" Clean up hv_cpuid_check_and_set() by separating hyperv_feature_supported() off it. No functional change intended. Signed-off-by: Vitaly Kuznetsov --- target/i386/kvm/kvm.c | 49 ++++++++++++++++++++++++++----------------- 1 file changed, 30 insertions(+), 19 deletions(-) diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c index 768e08fa5e8f..5472d78f5d73 100644 --- a/target/i386/kvm/kvm.c +++ b/target/i386/kvm/kvm.c @@ -1110,13 +1110,33 @@ static int hv_cpuid_get_fw(struct kvm_cpuid2 *cpuid= , int fw, uint32_t *r) return 0; } =20 +static bool hyperv_feature_supported(struct kvm_cpuid2 *cpuid, int feature) +{ + uint32_t r, fw, bits; + int i; + + for (i =3D 0; i < ARRAY_SIZE(kvm_hyperv_properties[feature].flags); i+= +) { + fw =3D kvm_hyperv_properties[feature].flags[i].fw; + bits =3D kvm_hyperv_properties[feature].flags[i].bits; + + if (!fw) { + continue; + } + + if (hv_cpuid_get_fw(cpuid, fw, &r) || (r & bits) !=3D bits) { + return false; + } + } + + return true; +} + static int hv_cpuid_check_and_set(CPUState *cs, struct kvm_cpuid2 *cpuid, int feature) { X86CPU *cpu =3D X86_CPU(cs); - uint32_t r, fw, bits; uint64_t deps; - int i, dep_feat; + int dep_feat; =20 if (!hyperv_feat_enabled(cpu, feature) && !cpu->hyperv_passthrough) { return 0; @@ -1135,23 +1155,14 @@ static int hv_cpuid_check_and_set(CPUState *cs, str= uct kvm_cpuid2 *cpuid, deps &=3D ~(1ull << dep_feat); } =20 - for (i =3D 0; i < ARRAY_SIZE(kvm_hyperv_properties[feature].flags); i+= +) { - fw =3D kvm_hyperv_properties[feature].flags[i].fw; - bits =3D kvm_hyperv_properties[feature].flags[i].bits; - - if (!fw) { - continue; - } - - if (hv_cpuid_get_fw(cpuid, fw, &r) || (r & bits) !=3D bits) { - if (hyperv_feat_enabled(cpu, feature)) { - fprintf(stderr, - "Hyper-V %s is not supported by kernel\n", - kvm_hyperv_properties[feature].desc); - return 1; - } else { - return 0; - } + if (!hyperv_feature_supported(cpuid, feature)) { + if (hyperv_feat_enabled(cpu, feature)) { + fprintf(stderr, + "Hyper-V %s is not supported by kernel\n", + kvm_hyperv_properties[feature].desc); + return 1; + } else { + return 0; } } =20 --=20 2.29.2