From patchwork Mon Jul 24 12:46:13 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Brown X-Patchwork-Id: 13324684 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 98D0FC001B0 for ; Mon, 24 Jul 2023 12:51:12 +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-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Cc:To:In-Reply-To:References:Message-Id :MIME-Version:Subject:Date:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=5J2YNO4zgc2Spd4dgqNmXTdhrRbw+pz5V9wwn3UIIMM=; b=1FUIGLOq67Ik+I 4dxA7a5xPHZz4NBqPbiS6mMivfniMrBeN4dPSPy7szztP+2nFOasufYjXrr1IFHf3wdBNPOZQ7Qaj //Hk/l2mQCh1wsEwHfkKTgFrqajeMQlfC1UXHlG+2/nP8ZBczzdlXQATxlWedF32T/jlG8AlEQHSb FtVFLACTDRPr9YZS7PpjRG4s+1zUdUWauYpYBVZnp4grJ8kNF1xxgll1TRa+Sk5wC8Rr0OYtmr4an M2xVmemgzBfqZNyHCF7RaB2MD/sHf04HSRAZCmRnns0fU3EfXlYycHVEbnmYrG/fB2Kvc7Qzrc/qM tQKdtjyWjFDzxSNEmuYg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qNv1o-004KE0-2i; Mon, 24 Jul 2023 12:51:08 +0000 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qNv0U-004J21-1o; Mon, 24 Jul 2023 12:49:48 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id D4C7261157; Mon, 24 Jul 2023 12:49:45 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 77D0EC433C7; Mon, 24 Jul 2023 12:49:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1690202985; bh=6C9vpUKzxaC1YPufnnUpE8qHeuHqYjFB9iVUxK25t6w=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=XsJYHa+kIAgS2CCOa7LW/8nHLa52NtiPmwTpouZl0KMjTcwczWJae9MrsyadRYqp4 NjmpGvvKIqjNEZbIw1ihnZyO28RsU1vq8rf0vm313/q7CEMyRmYRwZ7MDdIFHhkyng t83jp5fU2aSUHOgp5bSx+cti2+h4koI/azC65FWVTD18niCraPWwpjAHyfOpKVaH+T YTuaHyxYss4pCnIKAjF3A5lqDVrogZQdzzMtedQefoBauCySoxEtkXuyHGrIMX+m/E 9GV6Onzc5k2gYSPBxresj9HoSJPMrmcw5u1C1lMAw/DX3mZO4s3nwBNtHhzct2rHrr T0q+KNBLoAavg== From: Mark Brown Date: Mon, 24 Jul 2023 13:46:13 +0100 Subject: [PATCH v2 26/35] kselftest/arm64: Verify the GCS hwcap MIME-Version: 1.0 Message-Id: <20230724-arm64-gcs-v2-26-dc2c1d44c2eb@kernel.org> References: <20230724-arm64-gcs-v2-0-dc2c1d44c2eb@kernel.org> In-Reply-To: <20230724-arm64-gcs-v2-0-dc2c1d44c2eb@kernel.org> To: Catalin Marinas , Will Deacon , Jonathan Corbet , Andrew Morton , Marc Zyngier , Oliver Upton , James Morse , Suzuki K Poulose , Arnd Bergmann , Oleg Nesterov , Eric Biederman , Kees Cook , Shuah Khan , "Rick P. Edgecombe" , Deepak Gupta , Ard Biesheuvel , Szabolcs Nagy Cc: "H.J. Lu" , Paul Walmsley , Palmer Dabbelt , Albert Ou , linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, kvmarm@lists.linux.dev, linux-fsdevel@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, Mark Brown X-Mailer: b4 0.13-dev-099c9 X-Developer-Signature: v=1; a=openpgp-sha256; l=1205; i=broonie@kernel.org; h=from:subject:message-id; bh=6C9vpUKzxaC1YPufnnUpE8qHeuHqYjFB9iVUxK25t6w=; b=owEBbQGS/pANAwAKASTWi3JdVIfQAcsmYgBkvnKo6f3jqr3UTwz6pZgSF+rdKksxp/uJtcwca2ZR AgUzGISJATMEAAEKAB0WIQSt5miqZ1cYtZ/in+ok1otyXVSH0AUCZL5yqAAKCRAk1otyXVSH0LM3B/ 0UPEO0Wjj2jDMhLtiAxLbW0+JmSRkL85UA8GD7f0behK4SZudUEnykSfwI6LC+7dHO2StbswpuE0md IfAL8WVuwJr4TTV2wog9c8Poi5AbnXKPq1h8O86dzjA0ccYL+f4P1CSepX94zyYdpxVnqDk5lYBmd9 BbLMZfUAoLDFVFkNxMMHycIrpEC/Tq2CH2QIMTdEHqTOcbMiSahlB9lLXeHlSN6pmUAEkioll7m+hD GH9RdRHuxb+j2j9EqPOAs35APr7sLaY0UOMs124NtTM3/+Kr4TzcFF4K2BD3w56v+uDEDxLrYxT24q dWpQqi14QIEjkH1aQLDG8jYPKLJTaw X-Developer-Key: i=broonie@kernel.org; a=openpgp; fpr=3F2568AAC26998F9E813A1C5C3F436CA30F5D8EB X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230724_054946_712368_AB2BCCD6 X-CRM114-Status: GOOD ( 11.77 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Add coverage of the GCS hwcap to the hwcap selftest, using a read of GCSPR_EL0 to generate SIGILL without having to worry about enabling GCS. Signed-off-by: Mark Brown --- tools/testing/selftests/arm64/abi/hwcap.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/tools/testing/selftests/arm64/abi/hwcap.c b/tools/testing/selftests/arm64/abi/hwcap.c index d4ad813fed10..38844e4c5aae 100644 --- a/tools/testing/selftests/arm64/abi/hwcap.c +++ b/tools/testing/selftests/arm64/abi/hwcap.c @@ -39,6 +39,17 @@ static void cssc_sigill(void) asm volatile(".inst 0xdac01c00" : : : "x0"); } +static void gcs_sigill(void) +{ + unsigned long *gcspr; + + asm volatile( + "mrs %0, S3_3_C2_C5_1" + : "=r" (gcspr) + : + : "cc"); +} + static void mops_sigill(void) { char dst[1], src[1]; @@ -223,6 +234,14 @@ static const struct hwcap_data { .cpuinfo = "cssc", .sigill_fn = cssc_sigill, }, + { + .name = "GCS", + .at_hwcap = AT_HWCAP2, + .hwcap_bit = HWCAP2_GCS, + .cpuinfo = "gcs", + .sigill_fn = gcs_sigill, + .sigill_reliable = true, + }, { .name = "MOPS", .at_hwcap = AT_HWCAP2,