From patchwork Thu Jul 25 04:16:21 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Charlie Jenkins X-Patchwork-Id: 13741558 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 78000C3DA5D for ; Thu, 25 Jul 2024 04:16:55 +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=oCNFjAWTvZ/K9n8RA492YTj17kSflIiOCruGWQPjWKk=; b=SuUyrDgkyPelej e38aI4MUSafEz1ySu96oS/Wu9IQCBrE+d7DFCE6XwT8pXQK136CoD6XKLZa/e9lctvXsO/PCWt8mQ ckPEAbCFGt431M+rA0Lrie7ZnmkTV/H9uIW4eQq2L+YbsO9VKLwm/YBZ4wHA06U7ttfBIG6aDAOrc wENmcZCLOCfF15gWTF/nJ6d6/6ZuHSDgNzTwgtRQVYxy9meajWm7c4gwUYl5k9bqixOl3VxIeDeH6 qYrYaveAxn1K98U9ypMfjHj7/1Ai0qE5/TImivoq9Uz9eI0EsU+GQtDb6002kvjz3QjnDDSzyg3WF gJUlpjZ8AaHRbL83PjvQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sWpuN-0000000HIQp-3Fgw; Thu, 25 Jul 2024 04:16:51 +0000 Received: from mail-pg1-x535.google.com ([2607:f8b0:4864:20::535]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sWpuG-0000000HIJs-2h2d for linux-riscv@lists.infradead.org; Thu, 25 Jul 2024 04:16:48 +0000 Received: by mail-pg1-x535.google.com with SMTP id 41be03b00d2f7-793a3a79a83so322779a12.3 for ; Wed, 24 Jul 2024 21:16:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rivosinc-com.20230601.gappssmtp.com; s=20230601; t=1721881004; x=1722485804; darn=lists.infradead.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=waGQtK7wLqGMdqctdpa2LI7F8zx18MVLmG+Bg2On2xo=; b=bI1I1gLjnDW9ZUwqOKKDO/5zl4ddCZ6BxTqxJKOX62wm47PJGiDvW0Rj+drsZj9u1b zwqWKjVvBV+MdguHkIXd3lVeGWVoB5t2l3bQDy7+RIW+RsVxmzJLCRY2brNqkJAwFfdw IpBmpu6dgMjY7q9R5xNowVivAjIA71YjJHWFKAPwl3ey6iud1W1BKq4+xuXmWpeUdLK4 gzC3Lr0bT1i3kIqSRhgc5dscpbndkKN8Y/GqXN+6WfiL0eMWwmT96XdilzbSzwhRNJry IbXKWNXfmxKIReyP+f8TQ7tWZDClshwy80JxLiSZufkDbXws+JDlfh+2aB3sZhw+tG0Y WC2Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1721881004; x=1722485804; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=waGQtK7wLqGMdqctdpa2LI7F8zx18MVLmG+Bg2On2xo=; b=T16c+Ss7OPEuha9DiUERbJfBzWJJhdvP1GWLcld5g+UY6/dtxm/yiob1K/S3hZdQLm v4PVFkzk4RkG0lQ0+5urmEnMsC6gjvrd3vWi50ZAdYMlGLyKuWKiH0k7fYYvU3UGPcID fFhMmxMuv478dFJPFUAFcwETNpvScFNRwRIjT8ac1dDSmd/qR70KHYSKmv/WhWUv7dPL GvVAkA9MmxkftsOpgBSruxDuxivGcYdSgQcPv5Nx4cTf+41wqGjxQBlRQcAIOa8avpDl bMWZ5alEXZPn7FoPl6m8EFpOTKTpUEBHZxRz0QKaAndPB68e3MpsEmjmMe4OFJ8tIWvd mGFw== X-Gm-Message-State: AOJu0YyM2snoJ+koNNmM4RaRPVg59ejOwV9+b+KskuymTdzvNEeJBvmi dPYCC8ME/IJSIC1SxMSs60VqrleVCYFi7z1fjxRHjZstj0idVR+0bGnecvunnz8= X-Google-Smtp-Source: AGHT+IF7Wj1jysslJRo2YbhL+ZllAWEk5VBkWhXh+dV9KWMF6BOuJAu/WlN2DnDLSnWhoWvtk/vzsw== X-Received: by 2002:a05:6a20:2451:b0:1be:e265:81fa with SMTP id adf61e73a8af0-1c472ce5557mr2329507637.35.1721881003718; Wed, 24 Jul 2024 21:16:43 -0700 (PDT) Received: from charlie.ba.rivosinc.com ([64.71.180.162]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-1fed7f2b80bsm3781825ad.205.2024.07.24.21.16.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 24 Jul 2024 21:16:42 -0700 (PDT) From: Charlie Jenkins Date: Wed, 24 Jul 2024 21:16:21 -0700 Subject: [PATCH v8 04/13] riscv: Add thead and xtheadvector as a vendor extension MIME-Version: 1.0 Message-Id: <20240724-xtheadvector-v8-4-cf043168e137@rivosinc.com> References: <20240724-xtheadvector-v8-0-cf043168e137@rivosinc.com> In-Reply-To: <20240724-xtheadvector-v8-0-cf043168e137@rivosinc.com> To: Conor Dooley , Rob Herring , Krzysztof Kozlowski , Paul Walmsley , Palmer Dabbelt , Albert Ou , Jisheng Zhang , Chen-Yu Tsai , Jernej Skrabec , Samuel Holland , Samuel Holland , Jonathan Corbet , Shuah Khan , Guo Ren , Evan Green , Andy Chiu , Jessica Clarke , Andrew Jones Cc: linux-riscv@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-sunxi@lists.linux.dev, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, Charlie Jenkins , Conor Dooley X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1721880993; l=5053; i=charlie@rivosinc.com; s=20231120; h=from:subject:message-id; bh=5ca/ofBM1BHC3jWQzhd+v6YiGEI+TACErFYCYPD0ZdM=; b=5mX8BI8JGZb15aDRw5Qy7EYs8VsuUbWnRNFlhRCCOP4DkJd10HSOPi4onAwSgL1T64eM8sdue utBCCTsEoJ8CltdZmfqgDLuwzboi8ftalNsxYQaLclJ8Xt7QMWBbNYV X-Developer-Key: i=charlie@rivosinc.com; a=ed25519; pk=t4RSWpMV1q5lf/NWIeR9z58bcje60/dbtxxmoSfBEcs= X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240724_211644_910180_052D2519 X-CRM114-Status: GOOD ( 16.48 ) X-BeenThere: linux-riscv@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-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Add support to the kernel for THead vendor extensions with the target of the new extension xtheadvector. Signed-off-by: Charlie Jenkins Reviewed-by: Conor Dooley --- arch/riscv/Kconfig.vendor | 13 +++++++++++++ arch/riscv/include/asm/vendor_extensions/thead.h | 16 ++++++++++++++++ arch/riscv/kernel/cpufeature.c | 1 + arch/riscv/kernel/vendor_extensions.c | 10 ++++++++++ arch/riscv/kernel/vendor_extensions/Makefile | 1 + arch/riscv/kernel/vendor_extensions/thead.c | 18 ++++++++++++++++++ 6 files changed, 59 insertions(+) diff --git a/arch/riscv/Kconfig.vendor b/arch/riscv/Kconfig.vendor index 6f1cdd32ed29..9897442bd44f 100644 --- a/arch/riscv/Kconfig.vendor +++ b/arch/riscv/Kconfig.vendor @@ -16,4 +16,17 @@ config RISCV_ISA_VENDOR_EXT_ANDES If you don't know what to do here, say Y. endmenu +menu "T-Head" +config RISCV_ISA_VENDOR_EXT_THEAD + bool "T-Head vendor extension support" + select RISCV_ISA_VENDOR_EXT + default y + help + Say N here to disable detection of and support for all T-Head vendor + extensions. Without this option enabled, T-Head vendor extensions will + not be detected at boot and their presence not reported to userspace. + + If you don't know what to do here, say Y. +endmenu + endmenu diff --git a/arch/riscv/include/asm/vendor_extensions/thead.h b/arch/riscv/include/asm/vendor_extensions/thead.h new file mode 100644 index 000000000000..48421d1553ad --- /dev/null +++ b/arch/riscv/include/asm/vendor_extensions/thead.h @@ -0,0 +1,16 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_RISCV_VENDOR_EXTENSIONS_THEAD_H +#define _ASM_RISCV_VENDOR_EXTENSIONS_THEAD_H + +#include + +#include + +/* + * Extension keys must be strictly less than RISCV_ISA_VENDOR_EXT_MAX. + */ +#define RISCV_ISA_VENDOR_EXT_XTHEADVECTOR 0 + +extern struct riscv_isa_vendor_ext_data_list riscv_isa_vendor_ext_list_thead; + +#endif diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c index 8f20607adb40..46e69b9d66a7 100644 --- a/arch/riscv/kernel/cpufeature.c +++ b/arch/riscv/kernel/cpufeature.c @@ -25,6 +25,7 @@ #include #include #include +#include #define NUM_ALPHA_EXTS ('z' - 'a' + 1) diff --git a/arch/riscv/kernel/vendor_extensions.c b/arch/riscv/kernel/vendor_extensions.c index b6c1e7b5d34b..662ba64a8f93 100644 --- a/arch/riscv/kernel/vendor_extensions.c +++ b/arch/riscv/kernel/vendor_extensions.c @@ -6,6 +6,7 @@ #include #include #include +#include #include #include @@ -14,6 +15,9 @@ struct riscv_isa_vendor_ext_data_list *riscv_isa_vendor_ext_list[] = { #ifdef CONFIG_RISCV_ISA_VENDOR_EXT_ANDES &riscv_isa_vendor_ext_list_andes, #endif +#ifdef CONFIG_RISCV_ISA_VENDOR_EXT_THEAD + &riscv_isa_vendor_ext_list_thead, +#endif }; const size_t riscv_isa_vendor_ext_list_size = ARRAY_SIZE(riscv_isa_vendor_ext_list); @@ -41,6 +45,12 @@ bool __riscv_isa_vendor_extension_available(int cpu, unsigned long vendor, unsig cpu_bmap = &riscv_isa_vendor_ext_list_andes.per_hart_isa_bitmap[cpu]; break; #endif + #ifdef CONFIG_RISCV_ISA_VENDOR_EXT_THEAD + case THEAD_VENDOR_ID: + bmap = &riscv_isa_vendor_ext_list_thead.all_harts_isa_bitmap; + cpu_bmap = &riscv_isa_vendor_ext_list_thead.per_hart_isa_bitmap[cpu]; + break; + #endif default: return false; } diff --git a/arch/riscv/kernel/vendor_extensions/Makefile b/arch/riscv/kernel/vendor_extensions/Makefile index 6a61aed944f1..353522cb3bf0 100644 --- a/arch/riscv/kernel/vendor_extensions/Makefile +++ b/arch/riscv/kernel/vendor_extensions/Makefile @@ -1,3 +1,4 @@ # SPDX-License-Identifier: GPL-2.0-only obj-$(CONFIG_RISCV_ISA_VENDOR_EXT_ANDES) += andes.o +obj-$(CONFIG_RISCV_ISA_VENDOR_EXT_THEAD) += thead.o diff --git a/arch/riscv/kernel/vendor_extensions/thead.c b/arch/riscv/kernel/vendor_extensions/thead.c new file mode 100644 index 000000000000..0934a2086473 --- /dev/null +++ b/arch/riscv/kernel/vendor_extensions/thead.c @@ -0,0 +1,18 @@ +// SPDX-License-Identifier: GPL-2.0-only + +#include +#include +#include + +#include +#include + +/* All T-Head vendor extensions supported in Linux */ +const struct riscv_isa_ext_data riscv_isa_vendor_ext_thead[] = { + __RISCV_ISA_EXT_DATA(xtheadvector, RISCV_ISA_VENDOR_EXT_XTHEADVECTOR), +}; + +struct riscv_isa_vendor_ext_data_list riscv_isa_vendor_ext_list_thead = { + .ext_data_count = ARRAY_SIZE(riscv_isa_vendor_ext_thead), + .ext_data = riscv_isa_vendor_ext_thead, +};