From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f200.google.com (mail-pl1-f200.google.com [209.85.214.200]) (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 38B1956C645 for ; Wed, 30 Sep 2026 17:37:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.200 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790789878; cv=none; b=ejARtkjeSXnHHRIu8VqcAjrPVldOAM29x2j9k28+EJFwQQnl2IunI0lrQOH0zgCRS8aMhHKa7NMLpuaCadUG13Bda6UeZ0TdBUsElhjB3/h6j8/evSOLtqiyrv9ot3sluyg+vYN9+c61bI4FykLCsk7JLdYOJIeHG5EKhR286uU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790789878; c=relaxed/simple; bh=UYlYFWKz2yUT5DSS+dWmZ+7t6pORCHntp7z+e+YfLkA=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=hYqqAHkqmB8BDPKar1BHTcOW0HU8Q+CQSj4Z3uj8agV78o3S87+Phx1LLvt7HuWr1/KHQOWRQog8Un4qyvDcN81sSWXFyYCtY+vQxfWPdk7fjW28mUINnt8dewpAldfSyZXeDoDpP79ZbwbHHaNlfxGPIohNxN3V/dr4j0k1LYM= 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=H5ETp6X1; arc=none smtp.client-ip=209.85.214.200 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="H5ETp6X1" Received: by mail-pl1-f200.google.com with SMTP id d9443c01a7336-2cfa4e4684bso94581065ad.2 for ; Wed, 30 Sep 2026 10:37:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1790789876; x=1791394676; darn=vger.kernel.org; h=content-type:cc:to:from:subject:message-id:references:mime-version :in-reply-to:date:reply-to:from:to:cc:subject:date:message-id :reply-to:content-type; bh=4kpxy8IypVw+6oSZYz7BWKaExvROB4Eu+3y+VgEc0X4=; b=H5ETp6X11lQ2/Pi02I0fHa8ErOfJDv2iot2OkLPYJzLROhc0qw2Afmp5C6RBHbfQJE 3Ldj92Qizu/q5Vptx/hoWvoyMK3p3I5f54nn6avz7r9DNFOM5HFsPnTX/CYrs72BAB11 j6trF9Qvd6bXRMqKMIkmqMiwbd9niU0/AIv3ZBvHFDN156/mY1qpXFYZms4tNmy7SNTg DPXECcIzN0lbovrhqqJyyJVzSubjZw3J6WW/8MwqPoZZgw8txeBn2iOljFc220R3Y5Yf /gxEPRXzAV+1h3EgYw5bLxwrXA9YR3cqNpTd8NUgi2sbfRG1uOb4FhxWDhZ/LgscEebR 0QPA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1790789876; x=1791394676; h=content-type: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:content-type; bh=4kpxy8IypVw+6oSZYz7BWKaExvROB4Eu+3y+VgEc0X4=; b=ZtePybFBLQvyBwiL/dtHX4utEGpTAUHwiiOUJ9mw60/gSWXjTGz3AtwbNgeLKfUGoB d0kM+9w694ph22A0hXG8I67+0cs6DpVDDK6HyiEpqU+3BERpJMHtSVUmHPTiwjZJJHv3 rRisjiiZyi4P9gJc82H0v5fMkviXQeh3tAGFNOElBh2CwHrHbw7HTKwBy4iEW79Y+kdd R5wyNdzSHGfuQwc+Ja+70fmGjhJ8q8Wg4wPinOkMzMXslcoyt+Ul578NgQ6eHfcRxmnw xjU5GlYS83WfjPMI7STMxqJGL1HcA0AzeY2OoWW/Vt9ZQSeAVJ7O47B3kQeFRscaA6bJ 8dwg== X-Forwarded-Encrypted: i=1; AKwUvBzVuADraqFhkbTtFCU5J5B9V+dXUNSJjXbWUB9qk/IIOun6ZMM7Mk7sug3udKBa1oVOz7MW91t7GQvKVjA=@vger.kernel.org X-Gm-Message-State: AFq9FYK7Z+S7ZE1Z0dE2g0i9hAay1lHgm93rp7JVRZyYukRylbCWjnlH Q4+9RjloyDx7LumPYCsk729k7JNrlXqopBoRby06gJjfo1TH7p9pdsncPfp6hvYTIw7o41Nj1Fb 3boFMRA== X-Received: from plsm16.prod.google.com ([2002:a17:902:bb90:b0:2df:ab33:9c53]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:903:37c5:b0:2df:b5bb:7d12 with SMTP id d9443c01a7336-2e2e4b7cf7fmr17846995ad.46.1790789875665; Wed, 30 Sep 2026 10:37:55 -0700 (PDT) Reply-To: Sean Christopherson Date: Wed, 30 Sep 2026 10:36:29 -0700 In-Reply-To: <20260930173635.3362655-1-seanjc@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260930173635.3362655-1-seanjc@google.com> X-Mailer: git-send-email 2.56.0.rc1.315.gc6ed9934b7-goog Message-ID: <20260930173635.3362655-16-seanjc@google.com> Subject: [PATCH v3 15/21] KVM: selftests: Sanity check KVM's default TSC freq in nested TSC scaling test From: Sean Christopherson To: Sean Christopherson , Paolo Bonzini Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Amirmohammad Eftekhar , Sashiko Bot Content-Type: text/plain; charset="UTF-8" Explicitly verify that both L1 and L2 can run at KVM's default TSC frequency reported via KVM_GET_TSC_KHZ, e.g. that KVM_SET_TSC_KHZ can take in what KVM_GET_TSC_KHZ spits out. Signed-off-by: Sean Christopherson --- tools/testing/selftests/kvm/x86/nested_tsc_scaling_test.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/tools/testing/selftests/kvm/x86/nested_tsc_scaling_test.c b/tools/testing/selftests/kvm/x86/nested_tsc_scaling_test.c index a8f9307ed2a4..ee8fda310e33 100644 --- a/tools/testing/selftests/kvm/x86/nested_tsc_scaling_test.c +++ b/tools/testing/selftests/kvm/x86/nested_tsc_scaling_test.c @@ -223,6 +223,9 @@ int main(int argc, char *argv[]) tsc_end = rdtsc(); host_check_tsc_freq(0, tsc_end - tsc_start, l0_tsc_freq); + /* Sanity check the frequency reported by KVM_GET_TSC_KHZ. */ + test_tsc_scaling(l0_tsc_freq, l0_tsc_freq, l0_tsc_freq, BIT_ULL(frac_bits)); + /* Scale L1 "down" and L2 "up" at a random factor from 2 to 10. */ l1_scale = (kvm_random_u32(&kvm_rng) % 9) + 2; l2_scale = (kvm_random_u32(&kvm_rng) % 9) + 2; -- 2.56.0.rc1.315.gc6ed9934b7-goog