From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wanpeng Li Subject: [PATCH] target-i386: adds PV_DEDICATED hint CPUID feature bit Date: Thu, 8 Feb 2018 17:44:20 +0800 Message-ID: <1518083060-5881-1-git-send-email-wanpengli@tencent.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Cc: Paolo Bonzini , =?UTF-8?q?Radim=20Kr=C4=8Dm=C3=A1=C5=99?= , Eduardo Habkost To: qemu-devel@nongnu.org, kvm@vger.kernel.org Return-path: Received: from mail-pf0-f193.google.com ([209.85.192.193]:33072 "EHLO mail-pf0-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751055AbeBHJoY (ORCPT ); Thu, 8 Feb 2018 04:44:24 -0500 Received: by mail-pf0-f193.google.com with SMTP id u15so1540178pfa.0 for ; Thu, 08 Feb 2018 01:44:24 -0800 (PST) Sender: kvm-owner@vger.kernel.org List-ID: 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; -- 2.7.4