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 X-Spam-Level: X-Spam-Status: No, score=-8.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id CCBCAC56201 for ; Thu, 12 Nov 2020 09:47:02 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 2F336221FE for ; Thu, 12 Nov 2020 09:47:01 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2F336221FE Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 63BD16B005D; Thu, 12 Nov 2020 04:47:01 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 5EC456B0068; Thu, 12 Nov 2020 04:47:01 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 502AC6B006C; Thu, 12 Nov 2020 04:47:01 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0097.hostedemail.com [216.40.44.97]) by kanga.kvack.org (Postfix) with ESMTP id 218BF6B005D for ; Thu, 12 Nov 2020 04:47:01 -0500 (EST) Received: from smtpin22.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id BEBF2F04D for ; Thu, 12 Nov 2020 09:47:00 +0000 (UTC) X-FDA: 77475287400.22.dad55_58166de27305 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin22.hostedemail.com (Postfix) with ESMTP id 9D4AA18038E67 for ; Thu, 12 Nov 2020 09:47:00 +0000 (UTC) X-HE-Tag: dad55_58166de27305 X-Filterd-Recvd-Size: 2411 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf38.hostedemail.com (Postfix) with ESMTP for ; Thu, 12 Nov 2020 09:47:00 +0000 (UTC) Received: from gaia (unknown [2.26.170.190]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 946DE21D40; Thu, 12 Nov 2020 09:46:56 +0000 (UTC) Date: Thu, 12 Nov 2020 09:46:54 +0000 From: Catalin Marinas To: Andrey Konovalov Cc: Will Deacon , Vincenzo Frascino , Dmitry Vyukov , Andrey Ryabinin , Alexander Potapenko , Marco Elver , Evgenii Stepanov , Branislav Rankov , Kevin Brodsky , Andrew Morton , kasan-dev@googlegroups.com, linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v9 44/44] kselftest/arm64: Check GCR_EL1 after context switch Message-ID: <20201112094653.GH29613@gaia> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000002, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Tue, Nov 10, 2020 at 11:10:41PM +0100, Andrey Konovalov wrote: > From: Vincenzo Frascino > > This test is specific to MTE and verifies that the GCR_EL1 register > is context switched correctly. > > It spawn 1024 processes and each process spawns 5 threads. Each thread > writes a random setting of GCR_EL1 through the prctl() system call and > reads it back verifying that it is the same. If the values are not the > same it reports a failure. > > Note: The test has been extended to verify that even SYNC and ASYNC mode > setting is preserved correctly over context switching. > > Signed-off-by: Vincenzo Frascino > Signed-off-by: Andrey Konovalov Acked-by: Catalin Marinas