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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 2DB12C433F5 for ; Tue, 8 Feb 2022 01:22:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Content-Type: Content-Transfer-Encoding:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date:Message-ID:From: References:Cc:To:Subject:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=VRm94vsEOpXzi2DZdXbXBIyxizddhDgGriR1ZsgPS/I=; b=023GmCv3fZ2onnIXslgX4jUy5T 5lViJ1YMl4XGKK81WG9adi5t5fB9VoOb+iZNOGEdd0rztIi63RHAbxVHGvBNxOoFIGC1a8uDr9p6D vpZlEjKcpbCHEoTFbBDFHXbvZ+ir9SFpCW6TIuRJLYyn6149Ja1ECyWr3KCvQRkh2fp7iX1J9Pw92 p5+Mq2MxM0mRdzwPFa3q71tCxC4Sh4dX8+ve7jmegAAedXLUce+Pv5vxSqldcOdpYZG3aJ7yxwct9 SDqu02/eGlYkZdLEkqa/1hXDzu62RPevN4ze9pdO4aru0N0QO/zuufzNqTDVqAi5eglP0YjPFveLp aOUpzZgg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nHFBq-00C9HN-0g; Tue, 08 Feb 2022 01:21:06 +0000 Received: from mail-il1-x135.google.com ([2607:f8b0:4864:20::135]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nHFBl-00C9Ft-NH for linux-arm-kernel@lists.infradead.org; Tue, 08 Feb 2022 01:21:03 +0000 Received: by mail-il1-x135.google.com with SMTP id 15so12664914ilg.8 for ; Mon, 07 Feb 2022 17:21:01 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=google; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=kd+mZQkgkkn/Tv4WdZGQ/KIEa73QgXSSGBk+g1lPWwo=; b=b9miSaaDoTlRUq8wj+4UCzLsMLwnPXsplBZ6NE5K9/Hc6gBtKhUMOt3MBvFmNAMZ7y ULdbDGWpSVcy1ko5YFo2gssYl7D+zxHrydftYeaQ7JORCTgL9Xur8UIXe6quCn7JyTsJ BrmqbVfKUPWFei9HKvTUl2RlFpuZ2SQpA2LME= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=kd+mZQkgkkn/Tv4WdZGQ/KIEa73QgXSSGBk+g1lPWwo=; b=pBvWh+htYbJPtRad37tBKire0YdA9sjHnVdyGg0bNEavZdFAuEmWVfJYwmYBYFWdD8 fA8itFP60E45F104TAZpO1p0ZFghZjg379B52Ba8yrXXwkjWebn6yDystqcdrFHeajE9 YiYQh7F94HQJKCCDL7ZY+Tjof/VjZ3K9YS/MS94BZob9UNkm1H5Ddzm9NmaMzf89vTzJ LnEeX72L5neG9uRI3pgGPjlpNeZSRiiXL53boPfOinG+5xtVACefeIFBNeSlwWoOkDoz MNCLIGsjnBAfCuFZw05fdSqMBFP31VQA3d1WqZGZeZ3MBxRORXn5lG09qwEXIcAn1jaG sf8Q== X-Gm-Message-State: AOAM533Kn3KzjWfCvfPuxo3YAjEbhhNa0BsAmYsW5e4Oc7t8bpRUXAwX sTKc6E1NId8wiZobYtXOVquPeA== X-Google-Smtp-Source: ABdhPJyz17vnt9tqNnyska0hhxzUg+/rdXl9E+g69qWV8V7guYXGGiiEDOMTrslokSSK0CGBvNq98g== X-Received: by 2002:a92:c8c4:: with SMTP id c4mr1020408ilq.222.1644283260513; Mon, 07 Feb 2022 17:21:00 -0800 (PST) Received: from [192.168.1.128] ([71.205.29.0]) by smtp.gmail.com with ESMTPSA id k1sm6984769iov.6.2022.02.07.17.20.58 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 07 Feb 2022 17:21:00 -0800 (PST) Subject: Re: [PATCH v11 39/40] kselftest/arm64: Add coverage for the ZA ptrace interface To: Mark Brown , Catalin Marinas , Will Deacon , Marc Zyngier , Shuah Khan Cc: Alan Hayward , Luis Machado , Salil Akerkar , Basant Kumar Dwivedi , Szabolcs Nagy , James Morse , Alexandru Elisei , Suzuki K Poulose , linux-arm-kernel@lists.infradead.org, linux-kselftest@vger.kernel.org, kvmarm@lists.cs.columbia.edu, Shuah Khan References: <20220207152109.197566-1-broonie@kernel.org> <20220207152109.197566-40-broonie@kernel.org> From: Shuah Khan Message-ID: <8d1e2d2c-106c-10e6-cdaf-9bdd0d882263@linuxfoundation.org> Date: Mon, 7 Feb 2022 18:20:56 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 MIME-Version: 1.0 In-Reply-To: <20220207152109.197566-40-broonie@kernel.org> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220207_172101_806359_3E9FFD50 X-CRM114-Status: GOOD ( 27.95 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 2/7/22 8:21 AM, Mark Brown wrote: > Add some basic coverage for the ZA ptrace interface, including walking > through all the vector lengths supported in the system. Unlike SVE > doing syscalls does not discard the ZA state so when we set data in ZA > we run the child process briefly, having it add one to each byte in ZA > in order to validate that both the vector size and data are being read > and written as expected when the process runs. > > Signed-off-by: Mark Brown > --- > tools/testing/selftests/arm64/fp/.gitignore | 1 + > tools/testing/selftests/arm64/fp/Makefile | 3 +- > tools/testing/selftests/arm64/fp/za-ptrace.c | 354 +++++++++++++++++++ > 3 files changed, 357 insertions(+), 1 deletion(-) > create mode 100644 tools/testing/selftests/arm64/fp/za-ptrace.c > > diff --git a/tools/testing/selftests/arm64/fp/.gitignore b/tools/testing/selftests/arm64/fp/.gitignore > index ead3197e720b..d98d3d48b504 100644 > --- a/tools/testing/selftests/arm64/fp/.gitignore > +++ b/tools/testing/selftests/arm64/fp/.gitignore > @@ -8,4 +8,5 @@ sve-test > ssve-test > vec-syscfg > vlset > +za-ptrace > za-test > diff --git a/tools/testing/selftests/arm64/fp/Makefile b/tools/testing/selftests/arm64/fp/Makefile > index 38d2d0d5a0eb..807a8faf8d57 100644 > --- a/tools/testing/selftests/arm64/fp/Makefile > +++ b/tools/testing/selftests/arm64/fp/Makefile > @@ -1,7 +1,7 @@ > # SPDX-License-Identifier: GPL-2.0 > > CFLAGS += -I../../../../../usr/include/ > -TEST_GEN_PROGS := sve-ptrace sve-probe-vls vec-syscfg > +TEST_GEN_PROGS := sve-ptrace sve-probe-vls vec-syscfg za-ptrace > TEST_PROGS_EXTENDED := fp-pidbench fpsimd-test fpsimd-stress \ > rdvl-sme rdvl-sve \ > sve-test sve-stress \ > @@ -27,5 +27,6 @@ vec-syscfg: vec-syscfg.o rdvl.o > vlset: vlset.o > za-test: za-test.o asm-utils.o > $(CC) -nostdlib $^ -o $@ > +za-ptrace: za-ptrace.o > > include ../../lib.mk > diff --git a/tools/testing/selftests/arm64/fp/za-ptrace.c b/tools/testing/selftests/arm64/fp/za-ptrace.c > new file mode 100644 > index 000000000000..692c82624855 > --- /dev/null > +++ b/tools/testing/selftests/arm64/fp/za-ptrace.c > @@ -0,0 +1,354 @@ > +// SPDX-License-Identifier: GPL-2.0-only > +/* > + * Copyright (C) 2021 ARM Limited. > + */ > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > + > +#include "../../kselftest.h" > + > +/* and don't like each other, so: */ > +#ifndef NT_ARM_ZA > +#define NT_ARM_ZA 0x40c > +#endif > + > +#define EXPECTED_TESTS (((SVE_VQ_MAX - SVE_VQ_MIN) + 1) * 3) > + > +static void fill_buf(char *buf, size_t size) > +{ > + int i; > + > + for (i = 0; i < size; i++) > + buf[i] = random(); > +} > + > +static int do_child(void) > +{ > + if (ptrace(PTRACE_TRACEME, -1, NULL, NULL)) > + ksft_exit_fail_msg("PTRACE_TRACEME", strerror(errno)); > + > + if (raise(SIGSTOP)) > + ksft_exit_fail_msg("raise(SIGSTOP)", strerror(errno)); > + > + return EXIT_SUCCESS; > +} > + > +static struct user_za_header *get_za(pid_t pid, void **buf, size_t *size) > +{ > + struct user_za_header *za; > + void *p; > + size_t sz = sizeof(*za); > + struct iovec iov; > + > + while (1) { > + if (*size < sz) { > + p = realloc(*buf, sz); > + if (!p) { > + errno = ENOMEM; > + goto error; Do we free buf in error path? Didn't see it in error handling below. > + } > + > + *buf = p; > + *size = sz; > + } > + > + iov.iov_base = *buf; > + iov.iov_len = sz; > + if (ptrace(PTRACE_GETREGSET, pid, NT_ARM_ZA, &iov)) > + goto error; > + > + za = *buf; > + if (za->size <= sz) > + break; > + > + sz = za->size; > + } > + > + return za; > + > +error: Free buf? > + return NULL; > +} > + Rest looked okay. Reviewed-by: Shuah Khan thanks, -- Shuah _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel