From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="VboVc8LW" Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DF83E129 for ; Fri, 1 Dec 2023 11:46:44 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1701460003; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=5bAOLpYJ2nJlzCe8j/QXYogtqZvLNOuGnLuLyxl8bsY=; b=VboVc8LW6RhNvjNW6g8RixuD/4KYM1oM3Uo6Mkn106DIJ3R5UUPgOf+EtrjR+5gEEsCFiR JZYHucZ6LhNcHQAGWY+7RNtQ8eckZNQqi8lBYWNWMFpfNOcFc7G9+kQpoIo4z419Mq7xCf Rz8dr30X/JW+da3OtY4fZHyYwh2TDs4= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-586-tsZXnde5O5O6N81ZRvNlUA-1; Fri, 01 Dec 2023 14:46:40 -0500 X-MC-Unique: tsZXnde5O5O6N81ZRvNlUA-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.rdu2.redhat.com [10.11.54.5]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 05E7F918561; Fri, 1 Dec 2023 19:46:40 +0000 (UTC) Received: from telekom.ip.com (unknown [10.45.224.75]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 466F310EA5; Fri, 1 Dec 2023 19:46:38 +0000 (UTC) From: vmolnaro@redhat.com To: linux-perf-users@vger.kernel.org, acme@kernel.org, acme@redhat.com, vmolnaro@redhat.com Cc: mpetlan@redhat.com, leo.yan@linaro.org, james.clark@arm.com Subject: [PATCH] perf test record user-regs: Fix mask for vg register Date: Fri, 1 Dec 2023 20:46:17 +0100 Message-ID: <20231201194617.13012-1-vmolnaro@redhat.com> Precedence: bulk X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.5 From: Veronika Molnarova The 'vg' register for arm64 shows up in --user_regs as available when masking the variable AT_HWCAP with 1 << 22 returns '1' as done in perf_regs.c. However, in subtests for support of SVE, the check for the 'vg' register is done by masking the variable AT_HWCAP with the value 0x200000 which is equals to 1 << 21 instead of 1 << 22. This results in inconsistencies on certain systems where the test expects that the 'vg' register is not operational when it is, and vice-versa. During the testing on a machine that the test expected not to have the 'vg' register available, the perf record with option --user-regs showed records for the 'vg' register together with all of the others, which means that the mask for the subtest of perf_event_attr is off by one. Change the value of the mask from 0x200000 to 0x400000 to correct it. Signed-off-by: Veronika Molnarova --- tools/perf/tests/attr/test-record-user-regs-no-sve-aarch64 | 2 +- tools/perf/tests/attr/test-record-user-regs-sve-aarch64 | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/perf/tests/attr/test-record-user-regs-no-sve-aarch64 b/tools/perf/tests/attr/test-record-user-regs-no-sve-aarch64 index fbb065842880..bed765450ca9 100644 --- a/tools/perf/tests/attr/test-record-user-regs-no-sve-aarch64 +++ b/tools/perf/tests/attr/test-record-user-regs-no-sve-aarch64 @@ -6,4 +6,4 @@ args = --no-bpf-event --user-regs=vg kill >/dev/null 2>&1 ret = 129 test_ret = true arch = aarch64 -auxv = auxv["AT_HWCAP"] & 0x200000 == 0 +auxv = auxv["AT_HWCAP"] & 0x400000 == 0 diff --git a/tools/perf/tests/attr/test-record-user-regs-sve-aarch64 b/tools/perf/tests/attr/test-record-user-regs-sve-aarch64 index c598c803221d..a65113cd7311 100644 --- a/tools/perf/tests/attr/test-record-user-regs-sve-aarch64 +++ b/tools/perf/tests/attr/test-record-user-regs-sve-aarch64 @@ -6,7 +6,7 @@ args = --no-bpf-event --user-regs=vg kill >/dev/null 2>&1 ret = 1 test_ret = true arch = aarch64 -auxv = auxv["AT_HWCAP"] & 0x200000 == 0x200000 +auxv = auxv["AT_HWCAP"] & 0x400000 == 0x400000 kernel_since = 6.1 [event:base-record] -- 2.41.0