From nobody Thu Jan 1 11:02:35 2026 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B85E5C00A8F for ; Tue, 24 Oct 2023 00:27:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231922AbjJXA1t (ORCPT ); Mon, 23 Oct 2023 20:27:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48610 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231817AbjJXA1c (ORCPT ); Mon, 23 Oct 2023 20:27:32 -0400 Received: from mail-yw1-x114a.google.com (mail-yw1-x114a.google.com [IPv6:2607:f8b0:4864:20::114a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DE2D210DB for ; Mon, 23 Oct 2023 17:27:01 -0700 (PDT) Received: by mail-yw1-x114a.google.com with SMTP id 00721157ae682-5a81cd8d267so75335057b3.1 for ; Mon, 23 Oct 2023 17:27:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1698107219; x=1698712019; 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=14wArEVnBNhNrbZ4s3cIhEfuNUwYxvC64ZUFQ1mIX8Y=; b=nTIWCNrVOi4oWDJcxrd7dX3VpfEMFgMw8vyCBc5tB6ggMhlwXYvOVBzyw+AvzF5wob gIDwhJIR7mXT/3UhsK4+N4PepcSIAcF6ceRhc7vg27nO09eSrVvpNF2Yr7fiAwSpMUBs fNuITbfgNemreJ7n4sHVWJHGr9uuhAOZLOrPjG9yQoR5MX6kqxBAGHRErUjdg7N+Btpw 7VBnYJ2jAVz2PKA9Ul013LZogOOTXE+Lpd6t3n5/KSGcNXWh3ig4b24fcdTWd8rwa5+0 nCtvEEqRCFPKJazlIL7DcnQbqA/N0saxzc71dxG7pCZhJCcME+RrsL//Xc3aB1BEbXpR f2Jg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1698107219; x=1698712019; 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=14wArEVnBNhNrbZ4s3cIhEfuNUwYxvC64ZUFQ1mIX8Y=; b=RBx80dlB7ea3NJj27dzbMImaJcbMrO8bM/01JRFq5uucQ5y67loEkIbmmRF1sP1Bcq ylL26q5bvtzFo+AN5xHfETNYLsUognKq1eWa1Ry/w9FWOYPVfRUPCkZdn/1riy5p/XJn s1nBApTIIr6lv+rgZLnMgPeq/fdVDLifvEEcNUW4QkyMZeOfsXlIgObVIZ3jmUNQZCTI otB/5nG1cOF+f2n6bNhUn0qV6OeA1QzxQg86pRMkSq6EfLsXlUlrqZ85uPN8eJ8s4lDT 29M+wPTX6iQidjpQ4z3YTha6IrSgSMSNE2XyTineE6bnLG+EpkuQuP6jRZhomDSAYVvS 6JAQ== X-Gm-Message-State: AOJu0YzQrel3JlLiqF2oVY4XzoGGJPIFrCaGRH1s3E75mmho/BgO7X66 uDH21B5CA5rjapD4dFZAhW7G3RT/mgE= X-Google-Smtp-Source: AGHT+IG2LW9PGB9cXobco7ikpUCA0s3PI34T5IQvsTCHhMRo8sFby8GDriPs96/3MflKnfZN+sOTJMSSRpM= X-Received: from zagreus.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:5c37]) (user=seanjc job=sendgmr) by 2002:a0d:ccd4:0:b0:58c:b45f:3e94 with SMTP id o203-20020a0dccd4000000b0058cb45f3e94mr209290ywd.8.1698107218929; Mon, 23 Oct 2023 17:26:58 -0700 (PDT) Reply-To: Sean Christopherson Date: Mon, 23 Oct 2023 17:26:32 -0700 In-Reply-To: <20231024002633.2540714-1-seanjc@google.com> Mime-Version: 1.0 References: <20231024002633.2540714-1-seanjc@google.com> X-Mailer: git-send-email 2.42.0.758.gaed0368e0e-goog Message-ID: <20231024002633.2540714-13-seanjc@google.com> Subject: [PATCH v5 12/13] KVM: selftests: Add functional test for Intel's fixed PMU counters From: Sean Christopherson To: Sean Christopherson , Paolo Bonzini Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Jinrong Liang , Like Xu Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Jinrong Liang Extend the fixed counters test to verify that supported counters can actually be enabled in the control MSRs, that unsupported counters cannot, and that enabled counters actually count. Co-developed-by: Like Xu Signed-off-by: Like Xu Signed-off-by: Jinrong Liang [sean: fold into the rd/wr access test, massage changelog] Signed-off-by: Sean Christopherson --- .../selftests/kvm/x86_64/pmu_counters_test.c | 29 ++++++++++++++++++- 1 file changed, 28 insertions(+), 1 deletion(-) 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 f1d9cdd69a17..1c392ad156f4 100644 --- a/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c +++ b/tools/testing/selftests/kvm/x86_64/pmu_counters_test.c @@ -266,7 +266,6 @@ static void guest_rd_wr_counters(uint32_t base_msr, uin= t8_t nr_possible_counters vector =3D wrmsr_safe(msr, 0); GUEST_ASSERT_PMC_MSR_ACCESS(WRMSR, msr, expect_gp, vector); } - GUEST_DONE(); } =20 static void guest_test_gp_counters(void) @@ -280,6 +279,7 @@ static void guest_test_gp_counters(void) base_msr =3D MSR_IA32_PERFCTR0; =20 guest_rd_wr_counters(base_msr, MAX_NR_GP_COUNTERS, nr_gp_counters, 0); + GUEST_DONE(); } =20 static void test_gp_counters(uint8_t nr_gp_counters, uint64_t perf_cap) @@ -302,6 +302,7 @@ static void guest_test_fixed_counters(void) { uint64_t supported_bitmask =3D 0; uint8_t nr_fixed_counters =3D 0; + uint8_t i; =20 /* KVM provides fixed counters iff the vPMU version is 2+. */ if (this_cpu_property(X86_PROPERTY_PMU_VERSION) >=3D 2) @@ -316,6 +317,32 @@ static void guest_test_fixed_counters(void) =20 guest_rd_wr_counters(MSR_CORE_PERF_FIXED_CTR0, MAX_NR_FIXED_COUNTERS, nr_fixed_counters, supported_bitmask); + + for (i =3D 0; i < MAX_NR_FIXED_COUNTERS; i++) { + uint8_t vector; + uint64_t val; + + if (i >=3D nr_fixed_counters && !(supported_bitmask & BIT_ULL(i))) { + vector =3D wrmsr_safe(MSR_CORE_PERF_FIXED_CTR_CTRL, BIT_ULL(4 * i)); + __GUEST_ASSERT(vector =3D=3D GP_VECTOR, + "Expected #GP for counter %u in FIXED_CTRL_CTRL", i); + + vector =3D wrmsr_safe(MSR_CORE_PERF_GLOBAL_CTRL, BIT_ULL(PMC_IDX_FIXED = + i)); + __GUEST_ASSERT(vector =3D=3D GP_VECTOR, + "Expected #GP for counter %u in PERF_GLOBAL_CTRL", i); + continue; + } + + wrmsr(MSR_CORE_PERF_FIXED_CTR0 + i, 0); + wrmsr(MSR_CORE_PERF_FIXED_CTR_CTRL, BIT_ULL(4 * i)); + wrmsr(MSR_CORE_PERF_GLOBAL_CTRL, BIT_ULL(PMC_IDX_FIXED + i)); + __asm__ __volatile__("loop ." : "+c"((int){NUM_BRANCHES})); + wrmsr(MSR_CORE_PERF_GLOBAL_CTRL, 0); + val =3D rdmsr(MSR_CORE_PERF_FIXED_CTR0 + i); + + GUEST_ASSERT_NE(val, 0); + } + GUEST_DONE(); } =20 static void test_fixed_counters(uint8_t nr_fixed_counters, --=20 2.42.0.758.gaed0368e0e-goog