From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by sourceware.org (Postfix) with ESMTPS id ADCD63858D20 for ; Mon, 8 Apr 2024 08:38:18 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org ADCD63858D20 Authentication-Results: sourceware.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=redhat.com ARC-Filter: OpenARC Filter v1.0.0 sourceware.org ADCD63858D20 Authentication-Results: server2.sourceware.org; arc=none smtp.remote-ip=170.10.133.124 ARC-Seal: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1712565503; cv=none; b=GzvaAPL6HAWUOegWaXgNdGa23BQQ+SvF5OzP0PF0TeOTiQDk9e1526ugFpEEjjVPauW0xfL1qsyKVxIZawbLdSJdVGrE9pEtMv33c04fcuSLiz3O1DD0UZq/LbWKnYafQrF9dsMn2hsaf09QIdQduBqDo0wU1fqN6KRBSz2WmxA= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1712565503; c=relaxed/simple; bh=idaCioXhgJ9MdV+D8ZVM9C9sQehTfqPScocuTrnZN0U=; h=DKIM-Signature:From:To:Subject:Date:Message-ID:MIME-Version; b=kjzjQzhu/fria4RztF2dEhokhrY5lvSbCuBxlBG3RHvdSAD+FddlunJqagRV9UIuGsOQOTzG1Ksn6ZVltHU1cOdAURXfVw2Tj2xPtelWcpVB2LlOPutGD1mgRdVpQkW5Q3UUhp40tCZfZDkddscISnT7r8EXx4cnG4ufF/GsAEU= ARC-Authentication-Results: i=1; server2.sourceware.org DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1712565498; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=DRr5o7UWgmBDmz7WqlGA+Xk5ooeZrt5jLGWwQnh9guk=; b=H9TnCa/JrYzG5A9NJojafnLqzM5plAhMzhBRQJIYHgPuINIB/pMRtODEtrXsN6ijVOq5/V WEosFc15D7PAeIex9FNsJayxl9XB5jkN4ghO61HaisCOulvYriXbszwlbwSadntZs5hbw4 H+IRaJTpAWMSrFhlE7OSPetLYmW9G0A= 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-30-R1PhCPaANdmQaZw3f4fTLA-1; Mon, 08 Apr 2024 04:38:16 -0400 X-MC-Unique: R1PhCPaANdmQaZw3f4fTLA-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.rdu2.redhat.com [10.11.54.8]) (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 A5E3D1809EC6; Mon, 8 Apr 2024 08:38:16 +0000 (UTC) Received: from oldenburg.str.redhat.com (unknown [10.39.192.59]) by smtp.corp.redhat.com (Postfix) with ESMTPS id E9BADC09A05; Mon, 8 Apr 2024 08:38:15 +0000 (UTC) From: Florian Weimer To: Adhemerval Zanella Netto Cc: libc-alpha@sourceware.org Subject: Re: [PATCH v3 3/3] aarch64: Enhanced CPU diagnostics for ld.so In-Reply-To: <946cbc29-07ea-4c2f-a65e-c67d4a0448c2@linaro.org> (Adhemerval Zanella Netto's message of "Fri, 5 Apr 2024 10:42:26 -0300") References: <946cbc29-07ea-4c2f-a65e-c67d4a0448c2@linaro.org> Date: Mon, 08 Apr 2024 10:38:10 +0200 Message-ID: <877ch81c7h.fsf@oldenburg.str.redhat.com> User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.8 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain X-Spam-Status: No, score=-11.3 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,GIT_PATCH_0,RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H4,RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,SPF_NONE,TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: * Adhemerval Zanella Netto: > On 05/04/24 07:16, Florian Weimer wrote: >> This prints some information from struct cpu_features, and the midr_el1 >> and dczid_el0 system register contents on every CPU. >> --- >> manual/dynlink.texi | 34 +++++++++++ >> sysdeps/aarch64/dl-diagnostics-cpu.c | 84 ++++++++++++++++++++++++++++ >> 2 files changed, 118 insertions(+) >> create mode 100644 sysdeps/aarch64/dl-diagnostics-cpu.c >> >> diff --git a/manual/dynlink.texi b/manual/dynlink.texi >> index f2f2341818..6f4acf321d 100644 >> --- a/manual/dynlink.texi >> +++ b/manual/dynlink.texi >> @@ -224,6 +224,40 @@ reflect adjustment by @theglibc{}. >> These Linux-specific items show the values of @code{struct utsname}, as >> reported by the @code{uname} function. @xref{Platform Type}. >> >> +@item aarch64.cpu_features.@dots{} >> +These items are specific to the AArch64 architectures. They report data >> +that is used by @theglibc{} to select alternative function >> +implementations. > > Maybe also add some options are security related and not really tied > to ifunc support (mte, bti). I think MTE is also about selecting an implementation variant. I will add something regarding BTI. >> diff --git a/sysdeps/aarch64/dl-diagnostics-cpu.c b/sysdeps/aarch64/dl-diagnostics-cpu.c >> new file mode 100644 >> index 0000000000..e037e6ea8c >> --- /dev/null >> +++ b/sysdeps/aarch64/dl-diagnostics-cpu.c >> @@ -0,0 +1,84 @@ >> +/* Print CPU diagnostics data in ld.so. AArch64 version. >> + Copyright (C) 2021-2024 Free Software Foundation, Inc. > > Maybe just 2024 here. I started with a copy of the x86 file. Thanks, Florian