From patchwork Tue Aug 22 13:56:49 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Brown X-Patchwork-Id: 13360907 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 5DF20EE49AA for ; Tue, 22 Aug 2023 14:05:36 +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=zWISzgRTzu6ZkziGyIv3N+fvEov6TDTqBwZjfTBPiXM=; b=QZRx4f3BPGb4BM oV7RN6pzbu32PE1fFvjqH94zJwFCTkMTmJdH7Fl9SU2ge2ZSgmzmKI+lp+Z2jcQ6FKYd4XGhcF4hS veCAZRHNEcCbbLe/ihhw9K0O0zn9JpVV2E/yMjWqzBMde+aE5ASDrnCtaNzscVlM/Vv4XZWBnXyuE WXrkHw6t7sr+VBvIIgjHqpIsm/I/J6KW6YkAoErFva1h3NS+csgc6KglitzluYaHcwnygTdSWwXLQ o5PbM39sbQDBh2slRkye7C5mhh3gz39Y83yj46U3z55ngIO5Dh7xdrdVp79LuSPx0ByERm1GXEp5N E8iBDxVEMH8t75qTPqtw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qYS0C-00G7Zt-2Z; Tue, 22 Aug 2023 14:05:00 +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 1qYRzv-00G7Fi-2M; Tue, 22 Aug 2023 14:04:45 +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 236A965715; Tue, 22 Aug 2023 14:04:43 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9805AC43397; Tue, 22 Aug 2023 14:04:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1692713082; bh=ggfCgbEg0UE7JP5CH6e+dKjRf0SerXD/ltcRHcZOEeI=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=PVf4F+5e6t8UUn6GXDHZi9BvZRw+m0vJxxlC91Y+yBnT+DenVPfSgbW/1w8vHEcs5 hq5ngEXwckWY9oCWklaJVn+Cz4i+Hb7Pb+HyOeHTVt0p18dbb8XuCuzDwxXCZAtlzb 6p1/o8hbt7SE6/a+cd+ZYSZ7AUK1JhjB+an4crDxKNtg44IrCJwF1p3grdQvpPlXAk vZufltGG8aXY+z6av+xoWDvTN0kQEFsRuzILLsd9n6BZ9MRGZCGpRDs6hw6fJtgh/6 zfEtJxsOevzv4ydSNFeqpobaM9tniDA/fgC4nwIQR2PHG9Gjp8h/mXJms1judgWcy9 8RJQK2shpfIbw== From: Mark Brown Date: Tue, 22 Aug 2023 14:56:49 +0100 Subject: [PATCH v5 16/37] arm64/hwcap: Add hwcap for GCS MIME-Version: 1.0 Message-Id: <20230822-arm64-gcs-v5-16-9ef181dd6324@kernel.org> References: <20230822-arm64-gcs-v5-0-9ef181dd6324@kernel.org> In-Reply-To: <20230822-arm64-gcs-v5-0-9ef181dd6324@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=3001; i=broonie@kernel.org; h=from:subject:message-id; bh=ggfCgbEg0UE7JP5CH6e+dKjRf0SerXD/ltcRHcZOEeI=; b=owEBbQGS/pANAwAKASTWi3JdVIfQAcsmYgBk5L/88D0+8mIFj/SJZ4PZzOsz1BzhGTXwEx55mTve 3j6LrUWJATMEAAEKAB0WIQSt5miqZ1cYtZ/in+ok1otyXVSH0AUCZOS//AAKCRAk1otyXVSH0HYlB/ 9t7R1TANYsl4wXEHzWtNfhLanvzKzswgGvwqg5bmQhyHDwPtTqc5hckjtVPt/f/LJVr51CdGDI94sS r2Uaf6n5U2WmuiCip2sf324ojSqnqEESvqIhMOY+5esBYRf1GJnRB6BkVcnhvSltvVhJgkSoTqYdhI pbUOisNhR7+G5i9CsyNGMmD2Jplfn3F0Vw4XUr1Vgex0v4DRUf28aXbXv5QHQw/x+qQ4gNUpN5Px9L EWv/4VLtx4ndzg7vkWSi0+7g0OVmIVBWaEsRf9SIwRwiKq7tMIPmUgvZN9JUt19+Sqag4U1ZfuO3lC V4niGItNSjXw/mwDDx7oU2HQZ8Fde9 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-20230822_070443_911863_55181A34 X-CRM114-Status: GOOD ( 12.82 ) 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 Provide a hwcap to enable userspace to detect support for GCS. Signed-off-by: Mark Brown --- Documentation/arch/arm64/elf_hwcaps.rst | 3 +++ 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, 9 insertions(+) diff --git a/Documentation/arch/arm64/elf_hwcaps.rst b/Documentation/arch/arm64/elf_hwcaps.rst index 8c8addb4194c..75f3960cad39 100644 --- a/Documentation/arch/arm64/elf_hwcaps.rst +++ b/Documentation/arch/arm64/elf_hwcaps.rst @@ -305,6 +305,9 @@ HWCAP2_SMEF16F16 HWCAP2_MOPS Functionality implied by ID_AA64ISAR2_EL1.MOPS == 0b0001. +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 692b1ec663b2..39f397a2b5b2 100644 --- a/arch/arm64/include/asm/hwcap.h +++ b/arch/arm64/include/asm/hwcap.h @@ -138,6 +138,7 @@ #define KERNEL_HWCAP_SME_B16B16 __khwcap2_feature(SME_B16B16) #define KERNEL_HWCAP_SME_F16F16 __khwcap2_feature(SME_F16F16) #define KERNEL_HWCAP_MOPS __khwcap2_feature(MOPS) +#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 a2cac4305b1e..7510c35e6864 100644 --- a/arch/arm64/include/uapi/asm/hwcap.h +++ b/arch/arm64/include/uapi/asm/hwcap.h @@ -103,5 +103,6 @@ #define HWCAP2_SME_B16B16 (1UL << 41) #define HWCAP2_SME_F16F16 (1UL << 42) #define HWCAP2_MOPS (1UL << 43) +#define HWCAP2_GCS (1UL << 44) #endif /* _UAPI__ASM_HWCAP_H */ diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 91a14a6ccb04..7b46e01140c4 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -2840,6 +2840,9 @@ 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 58622dc85917..451fbbeffa39 100644 --- a/arch/arm64/kernel/cpuinfo.c +++ b/arch/arm64/kernel/cpuinfo.c @@ -126,6 +126,7 @@ static const char *const hwcap_str[] = { [KERNEL_HWCAP_SME_B16B16] = "smeb16b16", [KERNEL_HWCAP_SME_F16F16] = "smef16f16", [KERNEL_HWCAP_MOPS] = "mops", + [KERNEL_HWCAP_GCS] = "gcs", }; #ifdef CONFIG_COMPAT