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([103.230.148.187]) by smtp.gmail.com with ESMTPSA id d5-20020a170902cec500b00178a8f4d4f2sm6886480plg.74.2022.10.17.10.58.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 17 Oct 2022 10:58:29 -0700 (PDT) From: Gautam Menghani To: pbonzini@redhat.com, shuah@kernel.org, seanjc@google.com, gautammenghani201@gmail.com, guang.zeng@intel.com Cc: kvm@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2] selftests/kvm: Avoid for loop initialization using vcpu->id in xapic_state_test Date: Mon, 17 Oct 2022 23:28:19 +0530 Message-Id: <20221017175819.12672-1-gautammenghani201@gmail.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_ENVFROM_END_DIGIT, FREEMAIL_FROM,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS 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?1746958823231150418?= X-GMAIL-MSGID: =?utf-8?q?1746958823231150418?= In the test_icr() function in xapic_state_test, one of the for loops is initialized with vcpu->id. Fix this assumption that vcpu->id is 0 so that IPIs are correctly sent to non-existent vCPUs [1]. [1] https://lore.kernel.org/kvm/YyoZr9rXSSMEtdh5@google.com/ Suggested-by: Sean Christopherson Signed-off-by: Gautam Menghani --- changes in v2: 1. move the lore link above signed off tag tools/testing/selftests/kvm/x86_64/xapic_state_test.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/kvm/x86_64/xapic_state_test.c b/tools/testing/selftests/kvm/x86_64/xapic_state_test.c index 6f7a5ef66718..d7d37dae3eeb 100644 --- a/tools/testing/selftests/kvm/x86_64/xapic_state_test.c +++ b/tools/testing/selftests/kvm/x86_64/xapic_state_test.c @@ -114,7 +114,9 @@ static void test_icr(struct xapic_vcpu *x) * vCPUs, not vcpu.id + 1. Arbitrarily use vector 0xff. */ icr = APIC_INT_ASSERT | 0xff; - for (i = vcpu->id + 1; i < 0xff; i++) { + for (i = 0; i < 0xff; i++) { + if (i == vcpu->id) + continue; for (j = 0; j < 8; j++) __test_icr(x, i << (32 + 24) | icr | (j << 8)); }