From mboxrd@z Thu Jan 1 00:00:00 1970 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 lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id D55E1C433F5 for ; Mon, 17 Jan 2022 17:15:31 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4Jcz7Q2MtCz3fnD for ; Tue, 18 Jan 2022 04:15:30 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=GQGJradU; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=kernel.org (client-ip=2604:1380:4641:c500::1; helo=dfw.source.kernel.org; envelope-from=sashal@kernel.org; receiver=) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=GQGJradU; dkim-atps=neutral Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4JcyrL1Dj5z3dfF for ; Tue, 18 Jan 2022 04:02:26 +1100 (AEDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 81A0B61231; Mon, 17 Jan 2022 17:02:24 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8CAEEC36AE3; Mon, 17 Jan 2022 17:02:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1642438944; bh=/+mI8nrRREij5JDaj6gEO/h76K+KA7kZdaVgSdBD+Fk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GQGJradU2ZhiqDNGrl7G1uuFKHhyzMZr2N4o4H3wMZT/LdIhKNNxtHDjIF3qpnpod Z5t8xW7M2aBrx0i7wOuJmqDHQOXsnIdo+G/KsitgfivNqgiDaCmlY8SsbHKPXjWEAs ms6qA3VBcPsKPrcL5WUKMgP7JJlCtgtWzlkn5KX0eS8EspyN0CaAtZq8gkXYWj7jZs LaTGj32Vvu6QZ0K+7SPn0RqlpZ6/vh52ikZGc9WBiE22x+xDWf2VEAVQnq8BIOJU/e giZFERc3Eo9dwEgE8MU15TqimwWbfnxibVK0EJSc4Mm/LjOSf64UUqKERqEVYBnNjU xNYjHk2GbaV4A== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH AUTOSEL 5.15 25/44] selftests/powerpc/spectre_v2: Return skip code when miss_percent is high Date: Mon, 17 Jan 2022 12:01:08 -0500 Message-Id: <20220117170127.1471115-25-sashal@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220117170127.1471115-1-sashal@kernel.org> References: <20220117170127.1471115-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Sasha Levin , Thadeu Lima de Souza Cascardo , linuxppc-dev@lists.ozlabs.org, linux-kselftest@vger.kernel.org, shuah@kernel.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" From: Thadeu Lima de Souza Cascardo [ Upstream commit 3c42e9542050d49610077e083c7c3f5fd5e26820 ] A mis-match between reported and actual mitigation is not restricted to the Vulnerable case. The guest might also report the mitigation as "Software count cache flush" and the host will still mitigate with branch cache disabled. So, instead of skipping depending on the detected mitigation, simply skip whenever the detected miss_percent is the expected one for a fully mitigated system, that is, above 95%. Signed-off-by: Thadeu Lima de Souza Cascardo Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20211207130557.40566-1-cascardo@canonical.com Signed-off-by: Sasha Levin --- tools/testing/selftests/powerpc/security/spectre_v2.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/powerpc/security/spectre_v2.c b/tools/testing/selftests/powerpc/security/spectre_v2.c index adc2b7294e5fd..83647b8277e7d 100644 --- a/tools/testing/selftests/powerpc/security/spectre_v2.c +++ b/tools/testing/selftests/powerpc/security/spectre_v2.c @@ -193,7 +193,7 @@ int spectre_v2_test(void) * We are not vulnerable and reporting otherwise, so * missing such a mismatch is safe. */ - if (state == VULNERABLE) + if (miss_percent > 95) return 4; return 1; -- 2.34.1