From patchwork Mon Jan 29 08:58:46 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vitaly Kuznetsov X-Patchwork-Id: 13535252 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 75A4955779 for ; Mon, 29 Jan 2024 08:58:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706518736; cv=none; b=JR0Fs0fZQOkNcVoslVWSwg1iIjxmcU4K9a3DU0oPI4UPiDhrhbXxlpR/SbSBNcsyZDgCBQN3hs5dLq407imNgmMZyUTDJCpp/V3gU7crw5ZjL8rPj00dcN7h1rA61m9uAt525dNii56TkOzpgRNdp5XXMJJPdQy5Evb8Tsn9TFQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706518736; c=relaxed/simple; bh=CqtkdCNxl9n+RA9D/beypA4ENvb3fZHppFOaSs6zSAY=; h=From:To:Subject:Date:Message-ID:MIME-Version:Content-Type; b=YP2X/KhwY94Y4TDiYA9uqabCl0A2hKZ0rMi2sUddmXUgA4nFV5n8OdxU3BFpz4P44Ha1Yo9WvLB214d/NIhpXI76VWq696gzdKMa+uXaYbzUkScBTvBzMDbdVgOdfJrHPCox3hGMu4Xuob51pIBToYInF8W4CaP2vFO3FE6YgDA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=fqewF380; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="fqewF380" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1706518733; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=5XzGyD91tSFtwbaP/RZX9vrPIPZ99bsOrgK+5Q9UbRw=; b=fqewF380ObVUeZrtHa0ZYRpP83f3SZAj0SPFHic6D0YsUkup5m6pOegVAte1Ru36MP2I2Q nhI0J/w9iYQH4xyIpnROfV5Lvr5rjA+MrmkLWLZ9cFkIpeCGrcSwkOyrBVHhsYxfmQm1Tq HDj63AIDgj5QNP78D5fz0UXDLZvnmcE= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-655-O3wt7qbhOH660AYE7c-3vg-1; Mon, 29 Jan 2024 03:58:49 -0500 X-MC-Unique: O3wt7qbhOH660AYE7c-3vg-1 Received: from smtp.corp.redhat.com (int-mx10.intmail.prod.int.rdu2.redhat.com [10.11.54.10]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 3B53A868900; Mon, 29 Jan 2024 08:58:49 +0000 (UTC) Received: from fedora.redhat.com (unknown [10.45.225.235]) by smtp.corp.redhat.com (Postfix) with ESMTP id 82AA2492BE2; Mon, 29 Jan 2024 08:58:48 +0000 (UTC) From: Vitaly Kuznetsov To: kvm@vger.kernel.org, Paolo Bonzini , Sean Christopherson Subject: [PATCH v2 1/2] KVM: selftests: Avoid infinite loop in hyperv_features when invtsc is missing Date: Mon, 29 Jan 2024 09:58:46 +0100 Message-ID: <20240129085847.2674082-1-vkuznets@redhat.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.10 When X86_FEATURE_INVTSC is missing, guest_test_msrs_access() was supposed to skip testing dependent Hyper-V invariant TSC feature. Unfortunately, 'continue' does not lead to that as stage is not incremented. Moreover, 'vm' allocated with vm_create_with_one_vcpu() is not freed and the test runs out of available file descriptors very quickly. Fixes: bd827bd77537 ("KVM: selftests: Test Hyper-V invariant TSC control") Signed-off-by: Vitaly Kuznetsov --- tools/testing/selftests/kvm/x86_64/hyperv_features.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_features.c b/tools/testing/selftests/kvm/x86_64/hyperv_features.c index 4f4193fc74ff..b923a285e96f 100644 --- a/tools/testing/selftests/kvm/x86_64/hyperv_features.c +++ b/tools/testing/selftests/kvm/x86_64/hyperv_features.c @@ -454,7 +454,7 @@ static void guest_test_msrs_access(void) case 44: /* MSR is not available when CPUID feature bit is unset */ if (!has_invtsc) - continue; + goto next_stage; msr->idx = HV_X64_MSR_TSC_INVARIANT_CONTROL; msr->write = false; msr->fault_expected = true; @@ -462,7 +462,7 @@ static void guest_test_msrs_access(void) case 45: /* MSR is vailable when CPUID feature bit is set */ if (!has_invtsc) - continue; + goto next_stage; vcpu_set_cpuid_feature(vcpu, HV_ACCESS_TSC_INVARIANT); msr->idx = HV_X64_MSR_TSC_INVARIANT_CONTROL; msr->write = false; @@ -471,7 +471,7 @@ static void guest_test_msrs_access(void) case 46: /* Writing bits other than 0 is forbidden */ if (!has_invtsc) - continue; + goto next_stage; msr->idx = HV_X64_MSR_TSC_INVARIANT_CONTROL; msr->write = true; msr->write_val = 0xdeadbeef; @@ -480,7 +480,7 @@ static void guest_test_msrs_access(void) case 47: /* Setting bit 0 enables the feature */ if (!has_invtsc) - continue; + goto next_stage; msr->idx = HV_X64_MSR_TSC_INVARIANT_CONTROL; msr->write = true; msr->write_val = 1; @@ -513,6 +513,7 @@ static void guest_test_msrs_access(void) return; } +next_stage: stage++; kvm_vm_free(vm); }