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[2620:137:e000::1:20]) by mx.google.com with ESMTP id y18-20020a63b512000000b004e299dbbec9si3353403pge.372.2023.02.09.16.35.53; Thu, 09 Feb 2023 16:36:06 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@google.com header.s=20210112 header.b=Pb9YNrGh; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=google.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230304AbjBJAd6 (ORCPT + 99 others); Thu, 9 Feb 2023 19:33:58 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53086 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230183AbjBJAd0 (ORCPT ); Thu, 9 Feb 2023 19:33:26 -0500 Received: from mail-pj1-x104a.google.com (mail-pj1-x104a.google.com [IPv6:2607:f8b0:4864:20::104a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B9CD46E89B for ; Thu, 9 Feb 2023 16:32:36 -0800 (PST) Received: by mail-pj1-x104a.google.com with SMTP id dt6-20020a17090afa4600b00230183006c3so1590069pjb.7 for ; Thu, 09 Feb 2023 16:32:36 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; 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=4YaSCxh91s2vz1Wx4zQx2zkw5Mb7VIy4t0nr1FfetkY=; b=Pb9YNrGhDlI/KkrCjvmq6aONc/k8rCIIOTcWwh32p6eVOtc2iLVErkwMmRxXmoJGWr 4ovRCN8XSkgykLLXp0Nya9sUKwW/++zRSESKvzOrWF2AlS7ID5ZSoVelbRpB5nSBmrIy p885ziMNyde2KIuY0kcUsh7pg/ceJus5/PhPYdx275DUpIHm2+6ggVaYO3a0L+S43y3S 090t7+Fw5NupHRJCmZXoF+mMaXk58RXbqONmq0KbDeRkBbfL1GgfWt6TDbfvti+uQruM pLCmoWg1VuLuY0SuX81xSlEyDi0RqmPmiq0CgfOHWiDT1U5snzXS/BwiyRg89eZbZwEc hJUw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; 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=4YaSCxh91s2vz1Wx4zQx2zkw5Mb7VIy4t0nr1FfetkY=; b=ucA0eT4BEaQapKFYEwGGfRji7oAuUD/fC47yL8d8Tc1UOKwev9tneDBeZ1BrfcEzhZ o2xK/RFkiFYqmu57QCj17gJj92l9iAttyBJw9blo5WIsm7huio6UrCy/TlA82eofPFyb 6MSkZESBH299UxsvxXbPkxUPv4EbRpF8F8vs2dK455XnbKOvP4hrivzzD79JumA3cBTa b/GDayxGXdqNsoruipy9ocsoKwv8SwGNLbmsBsBb6BZ+1Pv7n1BrERG+tG+p5uWjPunY R+epynaRZyTexXa/FdBeWgGWRRfB+HLb4Wvoc9hLsSfkOZKTT0mQdJDmpCyrOBoNaHZ8 ileQ== X-Gm-Message-State: AO0yUKWkTWgL3tXJde0Ee/oRbRAmwWWnYYrb8AVtawbwCXb9In6v2LT5 heTVu7zM3/2ooVXHv9Vq4jlz3TvpQB8= X-Received: from zagreus.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:5c37]) (user=seanjc job=sendgmr) by 2002:a62:1c08:0:b0:590:762f:58bc with SMTP id c8-20020a621c08000000b00590762f58bcmr2799601pfc.50.1675989139088; Thu, 09 Feb 2023 16:32:19 -0800 (PST) Reply-To: Sean Christopherson Date: Fri, 10 Feb 2023 00:31:44 +0000 In-Reply-To: <20230210003148.2646712-1-seanjc@google.com> Mime-Version: 1.0 References: <20230210003148.2646712-1-seanjc@google.com> X-Mailer: git-send-email 2.39.1.581.gbfd45094c4-goog Message-ID: <20230210003148.2646712-18-seanjc@google.com> Subject: [PATCH v2 17/21] KVM: selftests: Test post-KVM_RUN writes to PERF_CAPABILITIES From: Sean Christopherson To: Sean Christopherson , Paolo Bonzini Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Xiaoyao Li , Like Xu X-Spam-Status: No, score=-9.6 required=5.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS,USER_IN_DEF_DKIM_WL autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1757402226132911089?= X-GMAIL-MSGID: =?utf-8?q?1757402226132911089?= Now that KVM disallows changing PERF_CAPABILITIES after KVM_RUN, expand the host side checks to verify KVM rejects any attempts to change bits from userspace. Signed-off-by: Sean Christopherson --- .../selftests/kvm/x86_64/vmx_pmu_caps_test.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c b/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c index 44fc6101a547..6fc86f5eba0b 100644 --- a/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c +++ b/tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c @@ -85,6 +85,7 @@ static void test_guest_wrmsr_perf_capabilities(union perf_capabilities host_cap) struct kvm_vcpu *vcpu; struct kvm_vm *vm = vm_create_with_one_vcpu(&vcpu, guest_code); struct ucall uc; + int r, i; vm_init_descriptor_tables(vm); vcpu_init_descriptor_tables(vcpu); @@ -106,6 +107,18 @@ static void test_guest_wrmsr_perf_capabilities(union perf_capabilities host_cap) ASSERT_EQ(vcpu_get_msr(vcpu, MSR_IA32_PERF_CAPABILITIES), host_cap.capabilities); + vcpu_set_msr(vcpu, MSR_IA32_PERF_CAPABILITIES, host_cap.capabilities); + + r = _vcpu_set_msr(vcpu, MSR_IA32_PERF_CAPABILITIES, 0); + TEST_ASSERT(!r, "Post-KVM_RUN write '0' didn't fail"); + + for (i = 0; i < 64; i++) { + r = _vcpu_set_msr(vcpu, MSR_IA32_PERF_CAPABILITIES, + host_cap.capabilities ^ BIT_ULL(i)); + TEST_ASSERT(!r, "Post-KVM_RUN write '0x%llx'didn't fail", + host_cap.capabilities ^ BIT_ULL(i)); + } + kvm_vm_free(vm); }