From patchwork Wed Nov 22 09:42:38 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Brown X-Patchwork-Id: 13464387 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 E6F7F1DA53; Wed, 22 Nov 2023 09:46:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="fUa44Bi6" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9A99AC43391; Wed, 22 Nov 2023 09:46:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1700646391; bh=I+uVw8aipGa+8Ns9k+b3dq26kNHNXYgyRv4lZpoE8Nc=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=fUa44Bi64x8jXoE/MvI8BIoiZzNypKXZeeiprmYPWGJR3lX5FGydI1vtuAYWadks7 UasgH5m/KtJQsDRJFu9SVTzRRZ09vZBslyb0Ho2ASTSMbx7DP6p+CS8+ianT5KLmas tJXDc07OIjutHkKJCdOQ9rbHFcS+M1Xk9x0/2ZDaXRW8l9gWOsMXGxNr64kYyyP2wN wkARHPE4CLrm5Ok5GqnIBpxAl47axEAxsh9fxCbSQqsYrNum0vfC6FHddFrleyQ0jj 1fispSHLot6aPOIBz5WXtqFTgm3jtICwL5ybtt6OQ3R735RlkVitJiiQ8Rd9rwhnj7 yf08/Sy6l7Hug== From: Mark Brown Date: Wed, 22 Nov 2023 09:42:38 +0000 Subject: [PATCH v7 28/39] kselftest/arm64: Verify the GCS hwcap Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20231122-arm64-gcs-v7-28-201c483bd775@kernel.org> References: <20231122-arm64-gcs-v7-0-201c483bd775@kernel.org> In-Reply-To: <20231122-arm64-gcs-v7-0-201c483bd775@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 , Florian Weimer , Christian Brauner , Thiago Jung Bauermann , 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-0438c X-Developer-Signature: v=1; a=openpgp-sha256; l=1190; i=broonie@kernel.org; h=from:subject:message-id; bh=I+uVw8aipGa+8Ns9k+b3dq26kNHNXYgyRv4lZpoE8Nc=; b=owEBbQGS/pANAwAKASTWi3JdVIfQAcsmYgBlXc0MyzVIJO4Kid9gCsCQr45ifThlTEHkARV/j UTsXVxwqbuJATMEAAEKAB0WIQSt5miqZ1cYtZ/in+ok1otyXVSH0AUCZV3NDAAKCRAk1otyXVSH 0PTmCACERewHlO0lUDAx7VBob22qNqbBIi4nI0finRcfRAMHGdVUVIxWAqs+6UQtEQWTanwoxxh RHNYkE5AnkhBIVqgo9rPkkciwxmqsPMafm9s1H0t/nysi4FdiMxIMpg6pQt0D3ydQ1Psg/yCml7 nbLsDLWDnrT2PZBbwMSZdbxpf6TLjfDdFnf2PqTp7lJXdovzdfaZM83h4amYvIT+snl3MZDg+DE yO8Tc24qt+aAP5Fbjm4kLsSFx2poUdmSadKGczZTZxfOnsCSNiQjkj2FshEGptZPCYDyN1vmU0z I1pxYkitO980tsJqitFcBPPgoo+CvzMYooor7SZAL9CXXBHj 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. 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 1189e77c8152..bc9e3250a9df 100644 --- a/tools/testing/selftests/arm64/abi/hwcap.c +++ b/tools/testing/selftests/arm64/abi/hwcap.c @@ -63,6 +63,17 @@ static void fp_sigill(void) asm volatile("fmov s0, #1"); } +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] */ @@ -360,6 +371,14 @@ static const struct hwcap_data { .cpuinfo = "fp", .sigill_fn = fp_sigill, }, + { + .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,