From patchwork Thu Feb 17 14:29:47 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vitaly Kuznetsov X-Patchwork-Id: 12750352 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 6F7B8C433F5 for ; Thu, 17 Feb 2022 15:23:26 +0000 (UTC) Received: from localhost ([::1]:49888 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nKicv-00012H-FR for qemu-devel@archiver.kernel.org; Thu, 17 Feb 2022 10:23:25 -0500 Received: from eggs.gnu.org ([209.51.188.92]:44790) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nKhnC-0001PP-Tv for qemu-devel@nongnu.org; Thu, 17 Feb 2022 09:29:58 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:39622) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nKhnB-0000gE-6R for qemu-devel@nongnu.org; Thu, 17 Feb 2022 09:29:58 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1645108196; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=zZCOV+fx06YOgONFCCQ/kgxJUjZPsMQZ+eVQZJE9mKI=; b=E4QWwsj4FNiUEI3du4wu8i2h+LWIa6NuyaxPKzT9OvK8gDXp+NiO9Xlu+DvMfwW+xaaOiv E3te1okvsuaCJCKoAIFAIDqNfAD0bU5ko8bdd22qRALA04vV1nsNcoYhX/lrEW44uUGz2r dcUr7rWQafrjbWbPfHmPJAx1MlFGOWw= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-670-BRa6miO4MRuGUoeQ_Xv07A-1; Thu, 17 Feb 2022 09:29:55 -0500 X-MC-Unique: BRa6miO4MRuGUoeQ_Xv07A-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 6F96D2F45 for ; Thu, 17 Feb 2022 14:29:54 +0000 (UTC) Received: from fedora.redhat.com (unknown [10.40.193.230]) by smtp.corp.redhat.com (Postfix) with ESMTP id 328257D706; Thu, 17 Feb 2022 14:29:53 +0000 (UTC) From: Vitaly Kuznetsov To: qemu-devel@nongnu.org Subject: [PATCH v2 1/3] i386: Use hv_build_cpuid_leaf() for HV_CPUID_NESTED_FEATURES Date: Thu, 17 Feb 2022 15:29:47 +0100 Message-Id: <20220217142949.297454-2-vkuznets@redhat.com> In-Reply-To: <20220217142949.297454-1-vkuznets@redhat.com> References: <20220217142949.297454-1-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 Received-SPF: pass client-ip=170.10.133.124; envelope-from=vkuznets@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -28 X-Spam_score: -2.9 X-Spam_bar: -- X-Spam_report: (-2.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Paolo Bonzini , Marcelo Tosatti Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Previously, HV_CPUID_NESTED_FEATURES.EAX CPUID leaf was handled differently as it was only used to encode the supported eVMCS version range. In fact, there are also feature (e.g. Enlightened MSR-Bitmap) bits there. In preparation to adding these features, move HV_CPUID_NESTED_FEATURES leaf handling to hv_build_cpuid_leaf() and drop now-unneeded 'hyperv_nested'. No functional change intended. Signed-off-by: Vitaly Kuznetsov --- target/i386/cpu.h | 1 - target/i386/kvm/kvm.c | 23 +++++++++++++++-------- 2 files changed, 15 insertions(+), 9 deletions(-) diff --git a/target/i386/cpu.h b/target/i386/cpu.h index 9911d7c8711b..537479d24928 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -1725,7 +1725,6 @@ struct X86CPU { uint32_t hyperv_vendor_id[3]; uint32_t hyperv_interface_id[4]; uint32_t hyperv_limits[3]; - uint32_t hyperv_nested[4]; bool hyperv_enforce_cpuid; uint32_t hyperv_ver_id_build; uint16_t hyperv_ver_id_major; diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c index 2c8feb4a6f7b..ceb331db8963 100644 --- a/target/i386/kvm/kvm.c +++ b/target/i386/kvm/kvm.c @@ -802,6 +802,8 @@ static bool tsc_is_stable_and_known(CPUX86State *env) || env->user_tsc_khz; } +#define DEFAULT_EVMCS_VERSION ((1 << 8) | 1) + static struct { const char *desc; struct { @@ -1209,6 +1211,13 @@ static uint32_t hv_build_cpuid_leaf(CPUState *cs, uint32_t func, int reg) } } + /* HV_CPUID_NESTED_FEATURES.EAX also encodes the supported eVMCS range */ + if (func == HV_CPUID_NESTED_FEATURES && reg == R_EAX) { + if (hyperv_feat_enabled(cpu, HYPERV_FEAT_EVMCS)) { + r |= DEFAULT_EVMCS_VERSION; + } + } + return r; } @@ -1338,11 +1347,13 @@ static int hyperv_fill_cpuids(CPUState *cs, X86CPU *cpu = X86_CPU(cs); struct kvm_cpuid_entry2 *c; uint32_t cpuid_i = 0; + uint32_t nested_eax = + hv_build_cpuid_leaf(cs, HV_CPUID_NESTED_FEATURES, R_EAX); c = &cpuid_ent[cpuid_i++]; c->function = HV_CPUID_VENDOR_AND_MAX_FUNCTIONS; - c->eax = hyperv_feat_enabled(cpu, HYPERV_FEAT_EVMCS) ? - HV_CPUID_NESTED_FEATURES : HV_CPUID_IMPLEMENT_LIMITS; + c->eax = nested_eax ? HV_CPUID_NESTED_FEATURES : + HV_CPUID_IMPLEMENT_LIMITS; c->ebx = cpu->hyperv_vendor_id[0]; c->ecx = cpu->hyperv_vendor_id[1]; c->edx = cpu->hyperv_vendor_id[2]; @@ -1406,7 +1417,7 @@ static int hyperv_fill_cpuids(CPUState *cs, c->ecx = cpu->hyperv_limits[1]; c->edx = cpu->hyperv_limits[2]; - if (hyperv_feat_enabled(cpu, HYPERV_FEAT_EVMCS)) { + if (nested_eax) { uint32_t function; /* Create zeroed 0x40000006..0x40000009 leaves */ @@ -1418,7 +1429,7 @@ static int hyperv_fill_cpuids(CPUState *cs, c = &cpuid_ent[cpuid_i++]; c->function = HV_CPUID_NESTED_FEATURES; - c->eax = cpu->hyperv_nested[0]; + c->eax = nested_eax; } return cpuid_i; @@ -1440,8 +1451,6 @@ static bool evmcs_version_supported(uint16_t evmcs_version, (max_version <= max_supported_version); } -#define DEFAULT_EVMCS_VERSION ((1 << 8) | 1) - static int hyperv_init_vcpu(X86CPU *cpu) { CPUState *cs = CPU(cpu); @@ -1545,8 +1554,6 @@ static int hyperv_init_vcpu(X86CPU *cpu) supported_evmcs_version >> 8); return -ENOTSUP; } - - cpu->hyperv_nested[0] = evmcs_version; } if (cpu->hyperv_enforce_cpuid) {