From patchwork Thu Aug 22 01:15:31 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Brown X-Patchwork-Id: 821521 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 0D1B613B285; Thu, 22 Aug 2024 01:21:47 +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=1724289708; cv=none; b=EiVOfAeNjHGNNYmCdsGQlLslQANLhyBpxn77y/8A52kkDaodOh01nHdhm4EzeyTjE6vTU0O+9kyUD0gJKmurh8xJ465+tQhmlQF8gUP/nEEdOl3Xm4Gn39vAZWVcNP4E6gNu2GWPS/Tx30BNgI9P7eBy4MybSljUGWSteYGdcSs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724289708; c=relaxed/simple; bh=oHs0edHK2ZH//P9wlXUiorha791DOO+hA3lq1vKIHRU=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=fUMea3n4ivnUPe3l/UCekNmSVTtFQ+dsrIi3U6yE0P5+y8DoDjWZbN+jQr1U4dVR6/hgwMDmalEskBc18L9VGdJDDwxrydVKujXlsOdv4grRqLBs5uT/3qvnPQ31waoNmfI2Fhhria2tdTB6dXmZIreJp+H3v9Ov/RUluOQBejU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=i2jJ8j7y; 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="i2jJ8j7y" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 14C90C4AF10; Thu, 22 Aug 2024 01:21:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1724289707; bh=oHs0edHK2ZH//P9wlXUiorha791DOO+hA3lq1vKIHRU=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=i2jJ8j7yO5ZxaxcgqkfrVoOX1ioF/kpI7DKJFezNvjCQnlVOinULY8Zjak9ELFf9g 7+6uhM3r3wLXETAStuORju7Yf7rkffQS5BOOAlApFwtSO1KPWev4UPd1mHu5oh8PFU JubPSf9+gWhnfejdO34HXSUwzypCNvnm3sjNO/xtiB6WzkLhfFGXOIWaWYvVQ4zjNV ZD3s9WFpYW/F1nxM7G4JOt/B015t+ByXRQgyifr92N8KVuDLjFzhkn60I66kqPUy8D jIhqv+traJMxxpKdDso4fEgQBnhI9PsrSymhZA0wP7gyuPUkZ4ALZSO4Yi/uEpm8Ds kvvnZvB7c8HpQ== From: Mark Brown Date: Thu, 22 Aug 2024 02:15:31 +0100 Subject: [PATCH v11 28/39] 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: <20240822-arm64-gcs-v11-28-41b81947ecb5@kernel.org> References: <20240822-arm64-gcs-v11-0-41b81947ecb5@kernel.org> In-Reply-To: <20240822-arm64-gcs-v11-0-41b81947ecb5@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 , Yury Khrustalev , Wilco Dijkstra , 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 0.15-dev-37811 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/pANAwAKASTWi3JdVIfQAcsmYgBmxpE5VVU3mpFKJ3hhjwa1thDydHnqMetxvpjvhVp+ 8HDjHUmJATMEAAEKAB0WIQSt5miqZ1cYtZ/in+ok1otyXVSH0AUCZsaROQAKCRAk1otyXVSH0AsLB/ 9E1Fcy2IXhvd/JhwhLRd+hrphvNVZfzJt505FwMtQNrnZzVixBvseWV9X6QlBFErh6ouCP81vIrMCq t2rSdIK/pY1jXzvzGra8yMdPJynAThpNy0Iz8l8hiyQrFOZR2cR7LkWqS4r7PwaBUdZlwXy165+Kqq 1VJIDF3fOjOgWpZ/UVwApLw+/dJIZhKvZtrCUrndbg0vD6sUyQuW/OD6q4MkHZeyxMoDCJK1wOhtJl tJ/3fzsjZ6SivGFUbnlwr+8gmS5VtzX6PUNQwOmZh3tcaaCuSIUt+4UP5lYhIOJl8gQ4EbSff1Qzj+ rqDAauZOO0JhY7bXmhQBlbkhQv7v/a 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,