From patchwork Wed Sep 18 20:53:17 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Colton Lewis X-Patchwork-Id: 829739 Received: from mail-yw1-f201.google.com (mail-yw1-f201.google.com [209.85.128.201]) (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 4C87E1CB535 for ; Wed, 18 Sep 2024 20:54:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726692845; cv=none; b=H0qYhf79g9HzQGQA6xJVKdq6PxV2IM3VbuVo7avYMi3mWGiSvuTPF/unEllpYQuhJvQC3CRYTKihWYwHTVwr6oTP8pFGT22yoldhTzLYKA6tioBIoU+/Qp5YIQoV61z/h094PJUFAlc+JlZaBvAT89/L5cNufxG+YYrlxqgg66s= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726692845; c=relaxed/simple; bh=aSdFYlUtz6P5Eo1j6ju7Ac/ao+lpyvnXe6lnLzmL3WA=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=fpOkxRynpzdOgRSN1+etiinMuZ7klrC59ICLFhQH0ZzYsXzyy0hsS5uXAVE6YGVwCpGLqlU9GFgBq9TSpJu4sgK61zKmiwdROWsPAfq8z4cdNPCtCzF1wZFcUBSevVvojhwfnyGoyQivubmCtg96lJCH90iKQoYCFmJ9oUzMN4k= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--coltonlewis.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=cfbogPtS; arc=none smtp.client-ip=209.85.128.201 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--coltonlewis.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="cfbogPtS" Received: by mail-yw1-f201.google.com with SMTP id 00721157ae682-6d5235d1bcaso2313327b3.2 for ; Wed, 18 Sep 2024 13:54:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1726692842; x=1727297642; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=OkrE8WmvzpBAiiKTV2LkBvEEkr6B/d2pJWlGO3Ml/wo=; b=cfbogPtSj8ie6NDwzOBjkw9KUvVueBVQFtgEXEPTJ+ZK3iic5Mlg8KrD8udtheKggD OOpHHBYUPzlUD3pyA68SwubY74nrvzHj4eWW4ywCKRHNax4ACrRs4GTtlVenEgx3pbVP 1D9YLCV1w6wk7FpnI+5G9++9cXC4wPp06Ih880t2hPJiuG8dOmErdchgWtsQ5z7jGaGs fYXPhcoV8UxMeYORpNdcxMrcGXd+3olnZWNMJ5HQa1e6ArbT1Rs1rOGy5vWcaHWc8n4C Yf+Tgon+Qbncf/MpxDUQrnx0eekfRSZ0YDf05kaLWhcTb8EZPpejr0RyjW6g9YhuSyyv 72Tg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1726692842; x=1727297642; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=OkrE8WmvzpBAiiKTV2LkBvEEkr6B/d2pJWlGO3Ml/wo=; b=LjH+Hsnbz9PLtb22Ysk/YYfjyAWftd7+TpdLLZY3oEkXQ9v72scDF8Sndl8+eKYIFL W2aNGixAtV9vg6Hpr6emthoFHEn/zPFDKutN9LVTUjjuL3mvsOdPY25JW+nW/c9j2AT5 I55Df7Q0gwb5pwchdeWjD5Nsert3CKk2fL1/sm3n846zOBI/k2gOlr79A3+2BEnOaGZv XccH8xds1hSH26PV5yJUooXTgY8d4iCOuPNXWBoYaRRbYTcf2gSXQSMhEjX7RlgLbmBw ceHjA5+MhKyNTnPEi3DiUhdXFEUpsbH3/I0qXry8A/50FyCjF4lSJPjYfLuIPkrjOZNS GjOQ== X-Forwarded-Encrypted: i=1; AJvYcCV/dPy1YL5rPNTERHN0BHMWHWpt+YIbHJTjHPop3eeUlB+UkhorD6i9OCU2VJ0YsNwmbySlXK3rC6DpNGn1XjQ=@vger.kernel.org X-Gm-Message-State: AOJu0YznQ7ZQSH0eoVpNuXTFiTC+8p16y7c4NthTLe6CEoDJ5D8NXth8 TlTjscrQ8keTLZFSJn3r0ZPujXByta8KW8OCOqamFm+KLjOz5lzx2M/F3oQT+MfvM5Sc6HFbu4b FsVcXghN+8Mk0P5riv4ZPHA== X-Google-Smtp-Source: AGHT+IGglH1MwiuQb6nf3SblZvhLMFNMZKCm/U6KRL3GGVpCYBWH8kXimB5ATPz5Ij0DZlhI64+AMN+To08XeyX1Gw== X-Received: from coltonlewis-kvm.c.googlers.com ([fda3:e722:ac3:cc00:11b:3898:ac11:fa18]) (user=coltonlewis job=sendgmr) by 2002:a25:a1a3:0:b0:e1a:6bf9:aa83 with SMTP id 3f1490d57ef6-e1d9db9e12fmr70673276.3.1726692842109; Wed, 18 Sep 2024 13:54:02 -0700 (PDT) Date: Wed, 18 Sep 2024 20:53:17 +0000 In-Reply-To: <20240918205319.3517569-1-coltonlewis@google.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20240918205319.3517569-1-coltonlewis@google.com> X-Mailer: git-send-email 2.46.0.662.g92d0881bb0-goog Message-ID: <20240918205319.3517569-5-coltonlewis@google.com> Subject: [PATCH v2 4/6] KVM: x86: selftests: Test read/write core counters From: Colton Lewis To: kvm@vger.kernel.org Cc: Mingwei Zhang , Jinrong Liang , Jim Mattson , Aaron Lewis , Sean Christopherson , Paolo Bonzini , Shuah Khan , linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, Colton Lewis Run a basic test to ensure we can write an arbitrary value to the core counters and read it back. Signed-off-by: Colton Lewis --- .../selftests/kvm/x86_64/pmu_counters_test.c | 54 +++++++++++++++++++ 1 file changed, 54 insertions(+) diff --git a/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c b/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c index 5b240585edc5..79ca7d608e00 100644 --- a/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c +++ b/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c @@ -641,11 +641,65 @@ static uint8_t nr_core_counters(void) return AMD_NR_CORE_EXT_COUNTERS; return AMD_NR_CORE_COUNTERS; +} + +static uint8_t guest_nr_core_counters(void) +{ + uint8_t nr_counters = this_cpu_property(X86_PROPERTY_NUM_PERF_CTR_CORE); + bool core_ext = this_cpu_has(X86_FEATURE_PERF_CTR_EXT_CORE); + + if (nr_counters != 0) + return nr_counters; + + if (core_ext) + return AMD_NR_CORE_EXT_COUNTERS; + + return AMD_NR_CORE_COUNTERS; + +} +static void guest_test_rdwr_core_counters(void) +{ + bool core_ext = this_cpu_has(X86_FEATURE_PERF_CTR_EXT_CORE); + uint8_t nr_counters = guest_nr_core_counters(); + uint8_t i; + uint32_t esel_msr_base = core_ext ? MSR_F15H_PERF_CTL : MSR_K7_EVNTSEL0; + uint32_t cnt_msr_base = core_ext ? MSR_F15H_PERF_CTR : MSR_K7_PERFCTR0; + uint32_t msr_step = core_ext ? 2 : 1; + + for (i = 0; i < AMD_NR_CORE_EXT_COUNTERS; i++) { + uint64_t test_val = 0xffff; + uint32_t esel_msr = esel_msr_base + msr_step * i; + uint32_t cnt_msr = cnt_msr_base + msr_step * i; + bool expect_gp = !(i < nr_counters); + uint8_t vector; + uint64_t val; + + /* Test event selection register. */ + vector = wrmsr_safe(esel_msr, test_val); + GUEST_ASSERT_PMC_MSR_ACCESS(WRMSR, esel_msr, expect_gp, vector); + + vector = rdmsr_safe(esel_msr, &val); + GUEST_ASSERT_PMC_MSR_ACCESS(RDMSR, esel_msr, expect_gp, vector); + + if (!expect_gp) + GUEST_ASSERT_PMC_VALUE(RDMSR, esel_msr, val, test_val); + + /* Test counter register. */ + vector = wrmsr_safe(cnt_msr, test_val); + GUEST_ASSERT_PMC_MSR_ACCESS(WRMSR, cnt_msr, expect_gp, vector); + + vector = rdmsr_safe(cnt_msr, &val); + GUEST_ASSERT_PMC_MSR_ACCESS(RDMSR, cnt_msr, expect_gp, vector); + + if (!expect_gp) + GUEST_ASSERT_PMC_VALUE(RDMSR, cnt_msr, val, test_val); + } } static void guest_test_core_counters(void) { + guest_test_rdwr_core_counters(); GUEST_DONE(); }