From mboxrd@z Thu Jan 1 00:00:00 1970 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 lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (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 BFFC1C4167B for ; Fri, 8 Dec 2023 05:59:56 +0000 (UTC) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=sifive.com header.i=@sifive.com header.a=rsa-sha256 header.s=google header.b=kmoS0JQ6; dkim-atps=neutral Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4SmgTR2c76z3dLM for ; Fri, 8 Dec 2023 16:59:55 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=sifive.com header.i=@sifive.com header.a=rsa-sha256 header.s=google header.b=kmoS0JQ6; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=sifive.com (client-ip=2607:f8b0:4864:20::62f; helo=mail-pl1-x62f.google.com; envelope-from=samuel.holland@sifive.com; receiver=lists.ozlabs.org) Received: from mail-pl1-x62f.google.com (mail-pl1-x62f.google.com [IPv6:2607:f8b0:4864:20::62f]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4SmgN0085lz3cbt for ; Fri, 8 Dec 2023 16:55:11 +1100 (AEDT) Received: by mail-pl1-x62f.google.com with SMTP id d9443c01a7336-1d0a5422c80so15560275ad.3 for ; Thu, 07 Dec 2023 21:55:11 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sifive.com; s=google; t=1702014910; x=1702619710; darn=lists.ozlabs.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=kq9/CzymS2t6cI6IAaf6StcamgWHCvrnQt5+bd0vsJ4=; b=kmoS0JQ61QD4NaciyWfGxqfv1hsHbkjZpWAdBZ2tQpcI3UvvnnNscau5o3dKqvWzzZ oKTjgXkt3c6/vzT6iGY85iDjFISC0sqzk248TP2qCe2YIOfxX6EmN8MlYSQtjUiIEOBk wmI/y1TUOSe7acsLUBnJA7c1Kx4bD9fm0zvGmru8FMtf1pC/XEmIzyO5O3p7zBF+wZ5y 8TxjhQifLu87SRVpd0YDilWru1Jj9X+VArEnNapKJuygGXlW4QNBU9eLK5wr3HZOlh7B Pkom+zpHi7BoHdo9tCjlFKRAsh+qwyuKHtiwjMC0fCd8NccBinCLvOy16r3kIO+AOpOL WvWA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1702014910; x=1702619710; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=kq9/CzymS2t6cI6IAaf6StcamgWHCvrnQt5+bd0vsJ4=; b=Rtf6mZZcGGDNJ0e7E4J2iJ0IWI6Ls0NbgO7V1L6NeDjhJp17Al80VYHVPj16mqFwNM EQ/5XLM9dN1CEK3+HkkdKXqASYYlRSotyxlJGxZRj/MC/J1bBxAiRM0FVBdWJSorzJHL u+JzhW5VyFQe+1NLeW9VWVaYORpYX0ThdqWrzI4rDpUV1iR1WKiSfR16wXkaXKZb1oJk T8X4kwppp9pryN+fcRG1+6st/scHVQTcv0vXAiYkfzXzF76SITMr4tTFTd8LaYNLL7oB ++Dqt9qzJ769lJlrJlpf2zqO/kCATClM3obUmvLvvcosB6+uPvUBMZRPwxW7EFm2lsZf mKnA== X-Gm-Message-State: AOJu0Yz/1GXW4BNYHKzwQgk4F1XoapqBG1bLU34OZAWI+n7T046cP0AT RBFx8VqdOURZrj7T54YNI4XupQ== X-Google-Smtp-Source: AGHT+IHV6F7Dn38rHWvZV+XaXS58Ch7TWuC4F5MVn7OmuYlLci2zlP9Fr0nUwpZzieoBTkpnbrTn6A== X-Received: by 2002:a17:903:2290:b0:1b8:90bd:d157 with SMTP id b16-20020a170903229000b001b890bdd157mr4496557plh.26.1702014910345; Thu, 07 Dec 2023 21:55:10 -0800 (PST) Received: from sw06.internal.sifive.com ([4.53.31.132]) by smtp.gmail.com with ESMTPSA id s22-20020a170902989600b001ce5b859a59sm786250plp.305.2023.12.07.21.55.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 07 Dec 2023 21:55:09 -0800 (PST) From: Samuel Holland To: linux-arm-kernel@lists.infradead.org, loongarch@lists.linux.dev, linuxppc-dev@lists.ozlabs.org, x86@kernel.org, linux-riscv@lists.infradead.org, Christoph Hellwig Subject: [RFC PATCH 06/12] LoongArch: Implement ARCH_HAS_KERNEL_FPU_SUPPORT Date: Thu, 7 Dec 2023 21:54:36 -0800 Message-ID: <20231208055501.2916202-7-samuel.holland@sifive.com> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231208055501.2916202-1-samuel.holland@sifive.com> References: <20231208055501.2916202-1-samuel.holland@sifive.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, amd-gfx@lists.freedesktop.org, Samuel Holland Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" LoongArch already provides kernel_fpu_begin() and kernel_fpu_end() in asm/fpu.h, so it only needs to add kernel_fpu_available() and export the CFLAGS adjustments. Signed-off-by: Samuel Holland --- arch/loongarch/Kconfig | 1 + arch/loongarch/Makefile | 5 ++++- arch/loongarch/include/asm/fpu.h | 1 + 3 files changed, 6 insertions(+), 1 deletion(-) diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig index ee123820a476..65d4475565b8 100644 --- a/arch/loongarch/Kconfig +++ b/arch/loongarch/Kconfig @@ -15,6 +15,7 @@ config LOONGARCH select ARCH_HAS_CPU_FINALIZE_INIT select ARCH_HAS_FORTIFY_SOURCE select ARCH_HAS_KCOV + select ARCH_HAS_KERNEL_FPU_SUPPORT if CPU_HAS_FPU select ARCH_HAS_NMI_SAFE_THIS_CPU_OPS select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE select ARCH_HAS_PTE_SPECIAL diff --git a/arch/loongarch/Makefile b/arch/loongarch/Makefile index 204b94b2e6aa..f5c4f7e921db 100644 --- a/arch/loongarch/Makefile +++ b/arch/loongarch/Makefile @@ -25,6 +25,9 @@ endif 32bit-emul = elf32loongarch 64bit-emul = elf64loongarch +CC_FLAGS_FPU := -mfpu=64 +CC_FLAGS_NO_FPU := -msoft-float + ifdef CONFIG_DYNAMIC_FTRACE KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY CC_FLAGS_FTRACE := -fpatchable-function-entry=2 @@ -46,7 +49,7 @@ ld-emul = $(64bit-emul) cflags-y += -mabi=lp64s endif -cflags-y += -pipe -msoft-float +cflags-y += -pipe $(CC_FLAGS_NO_FPU) LDFLAGS_vmlinux += -static -n -nostdlib # When the assembler supports explicit relocation hint, we must use it. diff --git a/arch/loongarch/include/asm/fpu.h b/arch/loongarch/include/asm/fpu.h index c2d8962fda00..3177674228f8 100644 --- a/arch/loongarch/include/asm/fpu.h +++ b/arch/loongarch/include/asm/fpu.h @@ -21,6 +21,7 @@ struct sigcontext; +#define kernel_fpu_available() cpu_has_fpu extern void kernel_fpu_begin(void); extern void kernel_fpu_end(void); -- 2.42.0