From patchwork Mon Dec 19 12:00:05 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tong Tiangen X-Patchwork-Id: 13076502 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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4833DC10F1B for ; Mon, 19 Dec 2022 12:00:47 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id A80418E0003; Mon, 19 Dec 2022 07:00:46 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id A2FF58E0001; Mon, 19 Dec 2022 07:00:46 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 8F6B28E0003; Mon, 19 Dec 2022 07:00:46 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id 803B38E0001 for ; Mon, 19 Dec 2022 07:00:46 -0500 (EST) Received: from smtpin04.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay07.hostedemail.com (Postfix) with ESMTP id 2BE10160B15 for ; Mon, 19 Dec 2022 12:00:46 +0000 (UTC) X-FDA: 80258914092.04.A882C75 Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187]) by imf12.hostedemail.com (Postfix) with ESMTP id DFFC14000D for ; Mon, 19 Dec 2022 12:00:42 +0000 (UTC) Authentication-Results: imf12.hostedemail.com; dkim=none; dmarc=pass (policy=quarantine) header.from=huawei.com; spf=pass (imf12.hostedemail.com: domain of tongtiangen@huawei.com designates 45.249.212.187 as permitted sender) smtp.mailfrom=tongtiangen@huawei.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1671451243; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=WNhk9CFgEgukzoHbRsO98T7cEkYKNoKzrzUU/0C7L5o=; b=x1vFpC4Y7tkT89zcwQFpV5lEc/+l14JetPK+n6YJ61A/0Jz3c6ugaqSFetafXYRR1fQNGf wyyHs+P1uhRQj3dhF1J0YZiLJ7jxFnTX1UbLX9M4teyNy1oLogulA6vM30YFvFW7cU3XmM J7ByJmc7WDxc4xbVPNAFlP+ptm+gzZU= ARC-Authentication-Results: i=1; imf12.hostedemail.com; dkim=none; dmarc=pass (policy=quarantine) header.from=huawei.com; spf=pass (imf12.hostedemail.com: domain of tongtiangen@huawei.com designates 45.249.212.187 as permitted sender) smtp.mailfrom=tongtiangen@huawei.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1671451243; a=rsa-sha256; cv=none; b=SFcHir68q7M4KQ5FxJT72wc5nZHWzavxqlqbqzsizca4NkADW3NHyLRwTTQxRZuKeXFT+P 9Od4bxi3+p9WvKHzS1TEd8pFKkWkRtFKdme3icy/kzSx/GLof7kMlLPi6LeRx3YuoemuYY a7fHszRNUl9i+keaONZouNivGPaksHs= Received: from kwepemm600017.china.huawei.com (unknown [172.30.72.54]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4NbJ8024v8zqT9Q; Mon, 19 Dec 2022 19:56:16 +0800 (CST) Received: from ubuntu.huawei.com (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 15.1.2375.34; Mon, 19 Dec 2022 20:00:37 +0800 From: Tong Tiangen To: Mark Rutland , James Morse , Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Robin Murphy , Dave Hansen , Catalin Marinas , Will Deacon , Alexander Viro , , "H . Peter Anvin" CC: , , , Kefeng Wang , Guohanjun , Xie XiuQi , Tong Tiangen Subject: [PATCH -next v8 1/4] uaccess: add generic fallback version of copy_mc_to_user() Date: Mon, 19 Dec 2022 12:00:05 +0000 Message-ID: <20221219120008.3818828-2-tongtiangen@huawei.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221219120008.3818828-1-tongtiangen@huawei.com> References: <20221219120008.3818828-1-tongtiangen@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.175.112.125] X-ClientProxiedBy: dggems706-chm.china.huawei.com (10.3.19.183) To kwepemm600017.china.huawei.com (7.193.23.234) X-CFilter-Loop: Reflected X-Rspam-User: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: DFFC14000D X-Stat-Signature: kqypn7n3hq8gursxpmsgqujg6j6y4twb X-HE-Tag: 1671451242-801910 X-HE-Meta: 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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 3ddc65c63a49..82dc55707c4b 100644 --- a/arch/powerpc/include/asm/uaccess.h +++ b/arch/powerpc/include/asm/uaccess.h @@ -357,6 +357,7 @@ 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 1d2c79246681..71a4d7bf9e38 100644 --- a/arch/x86/include/asm/uaccess.h +++ b/arch/x86/include/asm/uaccess.h @@ -559,6 +559,7 @@ copy_mc_to_kernel(void *to, const void *from, unsigned len); unsigned long __must_check copy_mc_to_user(void *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 46680189d761..8726260e5508 100644 --- a/include/linux/uaccess.h +++ b/include/linux/uaccess.h @@ -198,6 +198,15 @@ 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++;