From patchwork Mon Aug 7 22:00:31 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Brown X-Patchwork-Id: 13345183 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 058F0C001DF for ; Mon, 7 Aug 2023 22:05:22 +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-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=PyrYycENYaU9Mdy2MQI2emRZEb3oQPnKk57DV70ZATE=; b=f52xcG/pzuj4OO RMj9e7JxfLqfNLohdlPECsiRKviVuX/6r9VOUDRqgGbUn5pPgOE8T8qmss1SRvcLP6VKMTY8D4CF5 YOVGuYDKIvDqfMelhgepvkR9TlsGhkIAfhIzfp6qWT7hd92mdIjVh1zUQkZkAOoPHlIY7V32ikGG5 x3gBAXnWG8KAbXtPPOuwRVMYjvxv8hDuBu9ImYuSWaC1TLF5GXnZ+8H2A0FfKetR++GtuX80e+ObI 0xd8f1HNjU2gm0sbAlsAKPZU8SYjFi8gmNvLLbtBXmxZ/z1uxEu7KzJwwBnlCXfkTE4mQpRFzMsrz 454XF9XVo8NNi0SsgGGA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qT8LO-000swm-0w; Mon, 07 Aug 2023 22:04:54 +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 1qT8Km-000sIm-1K; Mon, 07 Aug 2023 22:04:21 +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 3BBD86229B; Mon, 7 Aug 2023 22:04:15 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E8415C433CA; Mon, 7 Aug 2023 22:04:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1691445854; bh=6C9vpUKzxaC1YPufnnUpE8qHeuHqYjFB9iVUxK25t6w=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=aNAspYX8YMDa4S1UOfbvx8zWfswbqBEz2wJe7nfM0pWFTYZgpasCip1sxspsbK1qs /ctFJQYBpm7aljWAEoddRMJF5WmAQCiy0iBDZYT5uSPQXATQIPS9q50niTcPxSoYYk U7X+2GqIufk6btPdrinnoTk4hj8wM7DiUAFP7dlkMqbK/aAWLB1jFFgmzAvPnQhJUU oXDcFIObaNQGJy0w483/tdaMENDzBL3QS97hz+z2fp/xbLo6OxHbD5nUXVeaLIwxqG NryQH3iy3EX4Hs9w39NpKQdf6CVUtGS5BHj7u+SZrrV/4S85G4qoG9XZQYOA2P/wW+ CAywrJ9cKhinw== From: Mark Brown Date: Mon, 07 Aug 2023 23:00:31 +0100 Subject: [PATCH v4 26/36] kselftest/arm64: Verify the GCS hwcap MIME-Version: 1.0 Message-Id: <20230807-arm64-gcs-v4-26-68cfa37f9069@kernel.org> References: <20230807-arm64-gcs-v4-0-68cfa37f9069@kernel.org> In-Reply-To: <20230807-arm64-gcs-v4-0-68cfa37f9069@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-034f2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1205; i=broonie@kernel.org; h=from:subject:message-id; bh=6C9vpUKzxaC1YPufnnUpE8qHeuHqYjFB9iVUxK25t6w=; b=owEBbQGS/pANAwAKASTWi3JdVIfQAcsmYgBk0WmsQXm1Nq46jBWok7xLjTNPIAVH3O++MCR+eGVU IlIReyiJATMEAAEKAB0WIQSt5miqZ1cYtZ/in+ok1otyXVSH0AUCZNFprAAKCRAk1otyXVSH0HEYB/ 0WPQNCRQxW5vYJJYV581n2TRG7EYT3pL7OPOKjvTDLv3U3bWOAdKBA69F+CMA2Cf9vB5QMcZPf8HbY F9VwARZ4J1JwbrXW8xotnruPFWMpZzyIdAgg8/YIU5lOzFtpFhSGm0hhnEjxK16rlpCflpZSVjVpnW OEQq6+W2PsvmhAgpMBYG5P2z/J1gUpUOqhoiDMNyFDYHNjd7tmG4yj+BHiaCXNRfWATS33Y1kRDx42 XRZ3wQ8i8jAjo3JO7pX95L7caAT8EAOfI+ZGgvR+1aHYzcbx2sehURn+5lDFBzXVM+CE8PTpXIUXLc VfOqijnQtnB8bltlyq6L9mWoafWwPE 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-20230807_150416_556919_4752C8C4 X-CRM114-Status: GOOD ( 11.52 ) 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: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=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,