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X-Received-From: 2607:f8b0:400e:c00::241 Subject: [Qemu-devel] [PATCH] target-i386: adds PV_DEDICATED hint CPUID feature bit X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Paolo Bonzini , Eduardo Habkost , =?UTF-8?q?Radim=20Kr=C4=8Dm=C3=A1=C5=99?= Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Wanpeng Li Add PV_DEDICATED hint cpuid feature bit. Cc: Paolo Bonzini Cc: Radim Krčmář Cc: Eduardo Habkost Signed-off-by: Wanpeng Li --- target/i386/cpu.c | 4 ++++ target/i386/cpu.h | 3 +++ 2 files changed, 7 insertions(+) diff --git a/target/i386/cpu.c b/target/i386/cpu.c index d70954b..cf48931 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -4076,6 +4076,9 @@ static int x86_cpu_filter_features(X86CPU *cpu) x86_cpu_get_supported_feature_word(w, false); uint32_t requested_features = env->features[w]; env->features[w] &= host_feat; + if (cpu->pv_dedicated && (w == FEAT_KVM)) { + env->features[w] |= CPUID_PV_DEDICATED; + } cpu->filtered_features[w] = requested_features & ~env->features[w]; if (cpu->filtered_features[w]) { rv = 1; @@ -4682,6 +4685,7 @@ static Property x86_cpu_properties[] = { false), DEFINE_PROP_BOOL("vmware-cpuid-freq", X86CPU, vmware_cpuid_freq, true), DEFINE_PROP_BOOL("tcg-cpuid", X86CPU, expose_tcg, true), + DEFINE_PROP_BOOL("pv-dedicated", X86CPU, pv_dedicated, false), /* * From "Requirements for Implementing the Microsoft diff --git a/target/i386/cpu.h b/target/i386/cpu.h index f91e37d..8000da5 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -672,6 +672,8 @@ typedef uint32_t FeatureWordArray[FEATURE_WORDS]; #define CPUID_8000_0008_EBX_IBPB (1U << 12) /* Indirect Branch Prediction Barrier */ +#define CPUID_PV_DEDICATED (1U << 8) + #define CPUID_XSAVE_XSAVEOPT (1U << 0) #define CPUID_XSAVE_XSAVEC (1U << 1) #define CPUID_XSAVE_XGETBV1 (1U << 2) @@ -1276,6 +1278,7 @@ struct X86CPU { bool expose_kvm; bool expose_tcg; bool migratable; + bool pv_dedicated; bool max_features; /* Enable all supported features automatically */ uint32_t apic_id;