From patchwork Tue Jun 25 14:57:55 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Brown X-Patchwork-Id: 13711391 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 99F63178390; Tue, 25 Jun 2024 15:03:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719327834; cv=none; b=oKA4YQmQaPWEA57m6oVF9LHEwFw2O7oUA93BvzBSc94DI3YqHw0f8wDILAhOfnBBSf2PxY4QoRVGiEc/+vnzJkIG8As+NYwgLx91P4506sCKh1wPncZCqmGgu8/I14XJC+TNeOyt+tkMaoziVa/hlGYK39sc33ThmoQqZfVztis= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719327834; c=relaxed/simple; bh=oHs0edHK2ZH//P9wlXUiorha791DOO+hA3lq1vKIHRU=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=SAkDFGqz6sFVhZNfW9W0m75eg1OTQAz8Me7ViTDwYlYnyQ9XWRA0cuQsYABssRMRjx6aj3l2N7PLcra4parjIggujsk7pJGGWoPzVb/3ODf2coq9PaWsk2eBIIjzo8R65d/dXsw55dBSL1noxenOT6Bg9OxLVwHkXNF4SwTVcxQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=RVcHIs3e; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="RVcHIs3e" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3D40BC4AF0B; Tue, 25 Jun 2024 15:03:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1719327834; bh=oHs0edHK2ZH//P9wlXUiorha791DOO+hA3lq1vKIHRU=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=RVcHIs3e0+1BTODXPOdXj48xTE6Ig2X77qbNnTIQRIsQ1F/J+hGQH3DoCpTsV74KQ LP4Qq7EwvxhXEaHHjIjrYyUvTxzK77ehOh//lQv8X7OkWgdjstOMorkAbbx+KHNX8q ROWqziyU952y0sO0yHkuO3MMdFFLczKsxuLA84f3p5kl05IXBvb14Owt3bAZqhg5ca dmGd1AnNLQrvvSqMYd/hpvNjgpq3P6QwCOEIgl3e5F7U6Sgudc33b1GrSWb3pdJmGz I2NzxVo+oIdHLb9gxBTnyjAvtRXZA9Ft3ss+7ArRfSNZRQDRf0jpb8Y1uP2KVUxvDI epU+0l3m7Vx5w== From: Mark Brown Date: Tue, 25 Jun 2024 15:57:55 +0100 Subject: [PATCH v9 27/39] kselftest/arm64: Verify the GCS hwcap Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240625-arm64-gcs-v9-27-0f634469b8f0@kernel.org> References: <20240625-arm64-gcs-v9-0-0f634469b8f0@kernel.org> In-Reply-To: <20240625-arm64-gcs-v9-0-0f634469b8f0@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 , Shuah Khan , "Rick P. Edgecombe" , Deepak Gupta , Ard Biesheuvel , Szabolcs Nagy , Kees Cook Cc: "H.J. Lu" , Paul Walmsley , Palmer Dabbelt , Albert Ou , Florian Weimer , Christian Brauner , Thiago Jung Bauermann , Ross Burton , 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 0.14-dev-d4707 X-Developer-Signature: v=1; a=openpgp-sha256; l=1288; i=broonie@kernel.org; h=from:subject:message-id; bh=oHs0edHK2ZH//P9wlXUiorha791DOO+hA3lq1vKIHRU=; b=owEBbQGS/pANAwAKASTWi3JdVIfQAcsmYgBmetuHDmIv/1BR7AmyIP7TdZpBb0DyVJraa/k+giyf IMNNkZeJATMEAAEKAB0WIQSt5miqZ1cYtZ/in+ok1otyXVSH0AUCZnrbhwAKCRAk1otyXVSH0GErB/ 9P0d2K2QWmEiq6MtR98YyQMB73y0NDVSTD0oL7snO1bVGdOgv3ptXZGHFRdCTsQEa39LCg09KHmEfQ uaxKzfCQgFpTtBTQ/V7TBQNmyNgv15eCxTBzb+bcJWTbQ69u7FmV9LUqaXf46j7gsK1RTSQPijNICB 43+McjEr3BipgL91KboTE8OffZ1hik0Lp3s5RXWvYgyHnYuwzaYNfGWKaFHiNm+XhLMBsFUJFBBODe S6XKVjZpD6+x8cR3DNl+jf0H/VUNt9Mv+ekTdgAOwCMdnCWAN9wXJ2khka98U9PvPIJEglltn1BqE3 D5k/13JN4yj/0zmk0jjehdcje46viA X-Developer-Key: i=broonie@kernel.org; a=openpgp; fpr=3F2568AAC26998F9E813A1C5C3F436CA30F5D8EB 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. Reviewed-by: Thiago Jung Bauermann 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 d8909b2b535a..dc54ae894fe5 100644 --- a/tools/testing/selftests/arm64/abi/hwcap.c +++ b/tools/testing/selftests/arm64/abi/hwcap.c @@ -98,6 +98,17 @@ static void fpmr_sigill(void) asm volatile("mrs x0, S3_3_C4_C4_2" : : : "x0"); } +static void gcs_sigill(void) +{ + unsigned long *gcspr; + + asm volatile( + "mrs %0, S3_3_C2_C5_1" + : "=r" (gcspr) + : + : "cc"); +} + static void ilrcpc_sigill(void) { /* LDAPUR W0, [SP, #8] */ @@ -528,6 +539,14 @@ static const struct hwcap_data { .sigill_fn = fpmr_sigill, .sigill_reliable = true, }, + { + .name = "GCS", + .at_hwcap = AT_HWCAP2, + .hwcap_bit = HWCAP2_GCS, + .cpuinfo = "gcs", + .sigill_fn = gcs_sigill, + .sigill_reliable = true, + }, { .name = "JSCVT", .at_hwcap = AT_HWCAP,