From nobody Thu Dec 18 11:49:17 2025 Received: from mail-pj1-f73.google.com (mail-pj1-f73.google.com [209.85.216.73]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4CF5455897 for ; Sat, 18 Jan 2025 00:35:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.73 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1737160504; cv=none; b=Eitqk/sftnNyoctTSfsz+uVVCce9mWJbDFue68XyfgoxXCqS/Lu9Qm7bWfMuqjJK1L9tIykNnQco+Zgld8tGDWSNrvE5zWM8WlxZ4DKBCsfz+9nwF4/QhNyTveiOlAar+m3pg9DBZbMASL2eNknSTj/IIv3EhTkLr0BJDC2+lQo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1737160504; c=relaxed/simple; bh=M+FM8JkgaYrZl57UPJEKqk4HTQ5og7YrE3nrBQALWz8=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=I8IytaQkrVpRtbQF1kCJKq2K9IbbJbKe6sbBftGSs+iBCpBsWCHVi8PlayWi7uN7OBD1/4OaaylMiqa3DU0pqIaP3/JIQZ1UCGv3Sd2ZW5eplsyTbUB1+bgYsHVj6ot6gklmwR1+zPKc2QuStosnS4BdZwK0lX3bKh2vTZn3ZMg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--seanjc.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=I9T1dKEG; arc=none smtp.client-ip=209.85.216.73 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--seanjc.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="I9T1dKEG" Received: by mail-pj1-f73.google.com with SMTP id 98e67ed59e1d1-2ef79d9c692so7717613a91.0 for ; Fri, 17 Jan 2025 16:35:03 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1737160502; x=1737765302; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:from:to:cc:subject:date:message-id:reply-to; bh=cl05ZUliPLXN59ib2RJa1JltTQzfK7DQwuddn7WHN1A=; b=I9T1dKEGMa++wPsxcRnwtvsYyBoG/yXsyeVtwKpDs29aNfFixTKXqZrtfGh3uvDD3q +H2/wgDt0NHizMIfL0QSP/hfd040aRpupB04U8GBUthKOqfe7giPWx5IJRlCUTCp8iXB UEswX6vDmgqFYTUE+uNqF5YqSZq0BI206jIUbLaClSAbXo03Yov7Cw9aeRTGr1SgUhkd Ms4x6Yvwbpd232kKykO15iuggFuXqYPv1DT81W5xiq1mDrHUm9bGI6CtZu2yxdmbhNOR oZhp4YtqPAzmRzW6fsky/G33J1XkN0IGXnLDlKLKlsB/Lz7djSUDiOgsHl+2rp8snzU/ OyCA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1737160502; x=1737765302; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=cl05ZUliPLXN59ib2RJa1JltTQzfK7DQwuddn7WHN1A=; b=waeT4xlyopYvKC75xMRktXy3cIkU1Qkg4DUzZtC+djsYQlujKG8AXM1rxVzC/MdtdC kKrOPdfKJkYziWWFsYiOXycdjUSRrLIZ1owdPSxtyaoyHA3fEWg8q78Dl2X5YX1vluSS PQbXZPLW81kgMBoIZKVM3DKW5leZDbd3luvIq0a+YMiyaO0YbN4Ce8EUuZ6jcCvT7zm+ ifipuOmMGsE5O2brMFvEa3CJTqKb7l5Zo6t5PunpdFL4o6kolvx/Up1sWPEZnZZl9oV7 pJSHOL/6y8Ei5rdmKk0hmIX+v9waufwXsE4o+ifQcNExxnVKllKFvF5s3gqUlcvkHEqG NHVg== X-Forwarded-Encrypted: i=1; AJvYcCVxosFKEzWuitdnF/r5ScYXf/sS2wlVJpkI16JvzVj10ixcbFGID+1xUpqWQZzaNMke/7hG/izwMzOUGqU=@vger.kernel.org X-Gm-Message-State: AOJu0Yyk/eFlwKKnUHNOS31tWx+OdHoQhZGUWsL4DRbkeMFbB3/CSoQg I4DH0UYzROGh7WD51p/149xGEmCb6XPeN4pLqR/cAic3OVApA6hPbZ4jeMscnJJndljoZ2WC6Bn b3g== X-Google-Smtp-Source: AGHT+IHQoMle06kwl/jYSacrkQ0Aw9hacjyWr7GuGkDpttr40/QHVTT717DSO+tCgrdOhmz1HhwpSzAHs+o= X-Received: from pfbkp16.prod.google.com ([2002:a05:6a00:4650:b0:728:ec44:ed90]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a00:b96:b0:72a:bc6a:3a85 with SMTP id d2e1a72fcca58-72dafbb6205mr6756642b3a.22.1737160502655; Fri, 17 Jan 2025 16:35:02 -0800 (PST) Reply-To: Sean Christopherson Date: Fri, 17 Jan 2025 16:34:54 -0800 In-Reply-To: <20250118003454.2619573-1-seanjc@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250118003454.2619573-1-seanjc@google.com> X-Mailer: git-send-email 2.48.0.rc2.279.g1de40edade-goog Message-ID: <20250118003454.2619573-5-seanjc@google.com> Subject: [PATCH v2 4/4] KVM: selftests: Add CPUID tests for Hyper-V features that need in-kernel APIC From: Sean Christopherson To: Vitaly Kuznetsov , Sean Christopherson , Paolo Bonzini Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Dongjie Zou Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add testcases to x86's Hyper-V CPUID test to verify that KVM advertises support for features that require an in-kernel local APIC appropriately, i.e. that KVM hides support from the vCPU-scoped ioctl if the VM doesn't have an in-kernel local APIC. Cc: Vitaly Kuznetsov Signed-off-by: Sean Christopherson Reviewed-by: Vitaly Kuznetsov --- tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c b/tools/test= ing/selftests/kvm/x86_64/hyperv_cpuid.c index 3188749ec6e1..8f26130dc30d 100644 --- a/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c +++ b/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c @@ -43,6 +43,7 @@ static bool smt_possible(void) =20 static void test_hv_cpuid(struct kvm_vcpu *vcpu, bool evmcs_expected) { + const bool has_irqchip =3D !vcpu || vcpu->vm->has_irqchip; const struct kvm_cpuid2 *hv_cpuid_entries; int i; int nent_expected =3D 10; @@ -85,12 +86,19 @@ static void test_hv_cpuid(struct kvm_vcpu *vcpu, bool e= vmcs_expected) entry->eax, evmcs_expected ); break; + case 0x40000003: + TEST_ASSERT(has_irqchip || !(entry->edx & BIT(19)), + "Synthetic Timers should require in-kernel APIC"); + break; case 0x40000004: test_val =3D entry->eax & (1UL << 18); =20 TEST_ASSERT(!!test_val =3D=3D !smt_possible(), "NoNonArchitecturalCoreSharing bit" " doesn't reflect SMT setting"); + + TEST_ASSERT(has_irqchip || !(entry->eax & BIT(10)), + "Cluster IPI (i.e. SEND_IPI) should require in-kernel APIC"); break; case 0x4000000A: TEST_ASSERT(entry->eax & (1UL << 19), @@ -145,9 +153,14 @@ int main(int argc, char *argv[]) =20 TEST_REQUIRE(kvm_has_cap(KVM_CAP_HYPERV_CPUID)); =20 - vm =3D vm_create_with_one_vcpu(&vcpu, guest_code); + /* Test the vCPU ioctl without an in-kernel local APIC. */ + vm =3D vm_create_barebones(); + vcpu =3D __vm_vcpu_add(vm, 0); + test_hv_cpuid(vcpu, false); + kvm_vm_free(vm); =20 /* Test vCPU ioctl version */ + vm =3D vm_create_with_one_vcpu(&vcpu, guest_code); test_hv_cpuid_e2big(vm, vcpu); test_hv_cpuid(vcpu, false); =20 --=20 2.48.0.rc2.279.g1de40edade-goog