From patchwork Thu Aug 22 01:15:20 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Brown X-Patchwork-Id: 822018 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 A930D433B9; Thu, 22 Aug 2024 01:19:33 +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=1724289573; cv=none; b=LPT1lk9iXfJW3TvUKu0kSeo0Do1/DPa5w+GZiHP150gN2FLJGdwfVzGkl9gI6kIl+jrONxUiOXEIQYAnl+GguEZn8yBkgmmvIR6HfbLilfdQk/WVO3XRn/l4qMTsNkB2qwkJCoRltbNbkhu8Buo8iakPDVqTRAsO75OAT4YoLHg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724289573; c=relaxed/simple; bh=p+k0jTbaEA99trdr4pz3NzAF7Yf9BBO+B19MeJlSzs4=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=JVhyENZ/ulwGqCZijhnCuXCcQdFJwqj8Lh6+Psw97mlSCI9AzHCHiYH421GWficNfk6KaG6HvXMXe37CsFGeE/UfoPOGyrBrCVqbhq374T5avz2tVZGIfs3UKJpmEeFbbKScAYmPB1COJqgnQW66jxfa91YV3AyMWeSr8CrTslQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=DwFM/rF8; 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="DwFM/rF8" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8FA7EC32782; Thu, 22 Aug 2024 01:19:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1724289573; bh=p+k0jTbaEA99trdr4pz3NzAF7Yf9BBO+B19MeJlSzs4=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=DwFM/rF8dbxF5iAiJQBkNcyl4MpQCNPo/7h0ijDZEC2DQwX6P9MCQJsdLQmYTo3w4 kN4XMcgPS2+Nspg04WpyMwQwYWuchJLA1u1F9LpbzcJyk4SC/i/91VJTbuWn3rtzAt VpyNFub3O4QF2XvVSbLUSDsC9s2WN1aGQDuRu0kbT6dN8Y8pNyKsAikEC/usnkkjoq oYOW1xC4zVRaLJoVH1YEwGK9uwA7iEDdO/7V5k+wsLwg3MbJLU8s9XwWsvX19Q49Yc vW0VQAElmyecYsp8uUWzpK8uNtNd5HA9mIXI4uZxTEQmHL5tLYrAUkMW5KpB5drC8e OCmI3NfA5JKKg== From: Mark Brown Date: Thu, 22 Aug 2024 02:15:20 +0100 Subject: [PATCH v11 17/39] arm64/hwcap: Add hwcap for GCS 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-v11-17-41b81947ecb5@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=3096; i=broonie@kernel.org; h=from:subject:message-id; bh=p+k0jTbaEA99trdr4pz3NzAF7Yf9BBO+B19MeJlSzs4=; b=owGbwMvMwMWocq27KDak/QLjabUkhrRjEw1DBY8JsZhfUkz7zMLPotW9MILVab/efK+acqsQxtNf nsp0MhqzMDByMciKKbKsfZaxKj1cYuv8R/NfwQxiZQKZwsDFKQAT8Upl/yuzWbS/+865EpdD2g498z w3P/6+U/jpagZd/3Lfla+CD88SiPb2SjaTYyl4HuGy3VWd4Z77x2pO0yk2u93KX2TNWZvNnHVgPUfc g/2Oh7JPOj0tMYzcy5q2RWum69L4Hdz2e5qFCw9z/IxuDv56fAZL3YGCuiKb2aIltw/yvpmoLjFr4V 6RCA9d9aV/rheX/57psfC3DM/klQLzpLbaWSruccnP3rqR9Yva9sdJqoVq89ryFSIy22MlImVtfZ7U V2//v+Zualed3eN8E7W66XEz5Xqm7lgwxeTN/tInxs+vsZbnze+rZj/lcWPT2mrDqSfjVAU7OMxbmD SKRU89ip8QE6tRGrlg/qnWXx0XAQ== X-Developer-Key: i=broonie@kernel.org; a=openpgp; fpr=3F2568AAC26998F9E813A1C5C3F436CA30F5D8EB Provide a hwcap to enable userspace to detect support for GCS. Reviewed-by: Thiago Jung Bauermann Signed-off-by: Mark Brown --- Documentation/arch/arm64/elf_hwcaps.rst | 2 ++ arch/arm64/include/asm/hwcap.h | 1 + arch/arm64/include/uapi/asm/hwcap.h | 1 + arch/arm64/kernel/cpufeature.c | 3 +++ arch/arm64/kernel/cpuinfo.c | 1 + 5 files changed, 8 insertions(+) diff --git a/Documentation/arch/arm64/elf_hwcaps.rst b/Documentation/arch/arm64/elf_hwcaps.rst index 448c1664879b..cf87be078f33 100644 --- a/Documentation/arch/arm64/elf_hwcaps.rst +++ b/Documentation/arch/arm64/elf_hwcaps.rst @@ -365,6 +365,8 @@ HWCAP2_SME_SF8DP2 HWCAP2_SME_SF8DP4 Functionality implied by ID_AA64SMFR0_EL1.SF8DP4 == 0b1. +HWCAP2_GCS + Functionality implied by ID_AA64PFR1_EL1.GCS == 0b1 4. Unused AT_HWCAP bits ----------------------- diff --git a/arch/arm64/include/asm/hwcap.h b/arch/arm64/include/asm/hwcap.h index 4edd3b61df11..fd7e162e7e39 100644 --- a/arch/arm64/include/asm/hwcap.h +++ b/arch/arm64/include/asm/hwcap.h @@ -157,6 +157,7 @@ #define KERNEL_HWCAP_SME_SF8FMA __khwcap2_feature(SME_SF8FMA) #define KERNEL_HWCAP_SME_SF8DP4 __khwcap2_feature(SME_SF8DP4) #define KERNEL_HWCAP_SME_SF8DP2 __khwcap2_feature(SME_SF8DP2) +#define KERNEL_HWCAP_GCS __khwcap2_feature(GCS) /* * This yields a mask that user programs can use to figure out what diff --git a/arch/arm64/include/uapi/asm/hwcap.h b/arch/arm64/include/uapi/asm/hwcap.h index 285610e626f5..328fb7843e2f 100644 --- a/arch/arm64/include/uapi/asm/hwcap.h +++ b/arch/arm64/include/uapi/asm/hwcap.h @@ -122,5 +122,6 @@ #define HWCAP2_SME_SF8FMA (1UL << 60) #define HWCAP2_SME_SF8DP4 (1UL << 61) #define HWCAP2_SME_SF8DP2 (1UL << 62) +#define HWCAP2_GCS (1UL << 63) #endif /* _UAPI__ASM_HWCAP_H */ diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 315bd7be1106..e3e8290a4447 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -2994,6 +2994,9 @@ static const struct arm64_cpu_capabilities arm64_elf_hwcaps[] = { HWCAP_CAP(ID_AA64ZFR0_EL1, I8MM, IMP, CAP_HWCAP, KERNEL_HWCAP_SVEI8MM), HWCAP_CAP(ID_AA64ZFR0_EL1, F32MM, IMP, CAP_HWCAP, KERNEL_HWCAP_SVEF32MM), HWCAP_CAP(ID_AA64ZFR0_EL1, F64MM, IMP, CAP_HWCAP, KERNEL_HWCAP_SVEF64MM), +#endif +#ifdef CONFIG_ARM64_GCS + HWCAP_CAP(ID_AA64PFR1_EL1, GCS, IMP, CAP_HWCAP, KERNEL_HWCAP_GCS), #endif HWCAP_CAP(ID_AA64PFR1_EL1, SSBS, SSBS2, CAP_HWCAP, KERNEL_HWCAP_SSBS), #ifdef CONFIG_ARM64_BTI diff --git a/arch/arm64/kernel/cpuinfo.c b/arch/arm64/kernel/cpuinfo.c index 09eeaa24d456..2f539e3101ee 100644 --- a/arch/arm64/kernel/cpuinfo.c +++ b/arch/arm64/kernel/cpuinfo.c @@ -143,6 +143,7 @@ static const char *const hwcap_str[] = { [KERNEL_HWCAP_SME_SF8FMA] = "smesf8fma", [KERNEL_HWCAP_SME_SF8DP4] = "smesf8dp4", [KERNEL_HWCAP_SME_SF8DP2] = "smesf8dp2", + [KERNEL_HWCAP_GCS] = "gcs", }; #ifdef CONFIG_COMPAT