From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from szxga04-in.huawei.com (szxga04-in.huawei.com [45.249.212.190]) (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 E9C17651B4 for ; Mon, 29 Jan 2024 13:47:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.190 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706536025; cv=none; b=BN2cCx72DFTqRs9eBZ1kpKHzriB57dSHJpMJ3zWHWDytkFKUshCii+zFvguSqr3+OwRajVBF3rGd4dQfDdyNs07LNRYAsGD3i+mlzz5EdqcFSY/UOOiXes4uD4qawj1jYiZV7qvtFbKnDjBnmLYizpKA1zqU7uXktILYCxpl4ZA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706536025; c=relaxed/simple; bh=bFrVw2Ws0d71Ys/zNaqJ6yUfFYy2SG5zl6dnCupuG+c=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=aHIM8VW7JnFRmbrToIPjgahPjtxnefyyUG6JshPHUpABVF+ZJu5Wcg4lomR4tD/1YbKL2gJmX0LBxbSygjRbekgsGBbXLTdN5Qo3boLYSueCExKAPxyEHXHq8rfUP1H8P1l4g1T3Du4g+AM3tdNRowz86hGkgYVGINLaUVen4Uo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; arc=none smtp.client-ip=45.249.212.190 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.19.88.214]) by szxga04-in.huawei.com (SkyGuard) with ESMTP id 4TNqMD0tZpz1xmlw; Mon, 29 Jan 2024 21:46:00 +0800 (CST) Received: from kwepemm600017.china.huawei.com (unknown [7.193.23.234]) by mail.maildlp.com (Postfix) with ESMTPS id 0E5831A016D; Mon, 29 Jan 2024 21:46:58 +0800 (CST) Received: from localhost.localdomain (10.175.112.125) by kwepemm600017.china.huawei.com (7.193.23.234) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.35; Mon, 29 Jan 2024 21:46:55 +0800 From: Tong Tiangen To: Catalin Marinas , Will Deacon , Mark Rutland , James Morse , Robin Murphy , Andrey Ryabinin , Alexander Potapenko , Alexander Viro , Andrey Konovalov , Dmitry Vyukov , Vincenzo Frascino , Andrew Morton , Michael Ellerman , Nicholas Piggin , Christophe Leroy , Aneesh Kumar K.V , "Naveen N. Rao" , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , , "H. Peter Anvin" CC: , , , , , Tong Tiangen , , Guohanjun Subject: [PATCH v10 1/6] uaccess: add generic fallback version of copy_mc_to_user() Date: Mon, 29 Jan 2024 21:46:47 +0800 Message-ID: <20240129134652.4004931-2-tongtiangen@huawei.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240129134652.4004931-1-tongtiangen@huawei.com> References: <20240129134652.4004931-1-tongtiangen@huawei.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: dggems701-chm.china.huawei.com (10.3.19.178) To kwepemm600017.china.huawei.com (7.193.23.234) x86/powerpc has it's implementation of copy_mc_to_user(), we add generic fallback in include/linux/uaccess.h prepare for other architechures to enable CONFIG_ARCH_HAS_COPY_MC. Signed-off-by: Tong Tiangen Acked-by: Michael Ellerman --- arch/powerpc/include/asm/uaccess.h | 1 + arch/x86/include/asm/uaccess.h | 1 + include/linux/uaccess.h | 9 +++++++++ 3 files changed, 11 insertions(+) diff --git a/arch/powerpc/include/asm/uaccess.h b/arch/powerpc/include/asm/uaccess.h index f1f9890f50d3..4bfd1e6f0702 100644 --- a/arch/powerpc/include/asm/uaccess.h +++ b/arch/powerpc/include/asm/uaccess.h @@ -381,6 +381,7 @@ copy_mc_to_user(void __user *to, const void *from, unsigned long n) return n; } +#define copy_mc_to_user copy_mc_to_user #endif extern long __copy_from_user_flushcache(void *dst, const void __user *src, diff --git a/arch/x86/include/asm/uaccess.h b/arch/x86/include/asm/uaccess.h index 5c367c1290c3..fd56282ee9a8 100644 --- a/arch/x86/include/asm/uaccess.h +++ b/arch/x86/include/asm/uaccess.h @@ -497,6 +497,7 @@ copy_mc_to_kernel(void *to, const void *from, unsigned len); unsigned long __must_check copy_mc_to_user(void __user *to, const void *from, unsigned len); +#define copy_mc_to_user copy_mc_to_user #endif /* diff --git a/include/linux/uaccess.h b/include/linux/uaccess.h index 3064314f4832..550287c92990 100644 --- a/include/linux/uaccess.h +++ b/include/linux/uaccess.h @@ -205,6 +205,15 @@ copy_mc_to_kernel(void *dst, const void *src, size_t cnt) } #endif +#ifndef copy_mc_to_user +static inline unsigned long __must_check +copy_mc_to_user(void *dst, const void *src, size_t cnt) +{ + check_object_size(src, cnt, true); + return raw_copy_to_user(dst, src, cnt); +} +#endif + static __always_inline void pagefault_disabled_inc(void) { current->pagefault_disabled++; -- 2.25.1