From patchwork Wed Jul 31 04:04:41 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chunyan Zhang X-Patchwork-Id: 13748049 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 D5306C3DA7F for ; Wed, 31 Jul 2024 04:06:21 +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:MIME-Version:Message-Id:Date:Subject:Cc :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=VHiSmzzjv6eckw6XS/gVNJKZNBTKvQfLUGSEQcrWaKk=; b=mYuEXq5i5DwDbe JgOVOo2Nw7seqJ7eHBA9/Kpvk4hrO35zGVr0VOFMQXqq91jQB9UsVLesy2eeiyyJLQYL5R8LSI+JX u2R0kOaz/law+oUcFakCsGJiq0WnKX87mKu96S1vSvJnLvzMecE3l6PIoKveVUm3LZSH01IOSu8S2 472bEkkEjXASHdc6VqsN/1E5nbSzznPG+bAnghxeudrdP3k7z1apT/WDYQ9aw9msw/YX5XyVBRKJU w+STIt0BDfap9VmlYOCX24XZ9N0qinB2HZRj4AtqPvPqc4bQIhSNpC9HqpkC8p+E3sLx/nrhkJvoN uBTa3hEtgx1x+rHW5y0w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sZ0bP-0000000HEJe-16NB; Wed, 31 Jul 2024 04:06:15 +0000 Received: from smtp21.cstnet.cn ([159.226.251.21] helo=cstnet.cn) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sZ0bL-0000000HEIM-3SJl for linux-riscv@lists.infradead.org; Wed, 31 Jul 2024 04:06:13 +0000 Received: from ubt.. (unknown [210.73.53.31]) by APP-01 (Coremail) with SMTP id qwCowAAnL0spuKlmWXZdAg--.7845S2; Wed, 31 Jul 2024 12:06:04 +0800 (CST) From: Chunyan Zhang To: Paul Walmsley , Palmer Dabbelt , Albert Ou , Andrew Morton , Alexandre Ghiti Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Chunyan Zhang Subject: [PATCH V2 0/3] riscv: mm: Add soft-dirty and uffd-wp support Date: Wed, 31 Jul 2024 12:04:41 +0800 Message-Id: <20240731040444.3384790-1-zhangchunyan@iscas.ac.cn> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-CM-TRANSID: qwCowAAnL0spuKlmWXZdAg--.7845S2 X-Coremail-Antispam: 1UD129KBjvJXoW7Aw17trWDGF1fZryUCr4Uurg_yoW8JFykpa 9xCw15tryYkr1IyrsxAr1qgw15X3WfG3s0yry3X34ktw45WF4UZr9Yk3W8Jw18Ja42vr90 ka1UGry5Cw4kZaUanT9S1TB71UUUUUDqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUvSb7Iv0xC_tr1lb4IE77IF4wAFF20E14v26r4j6ryUM7CY07I2 0VC2zVCF04k26cxKx2IYs7xG6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rw A2F7IY1VAKz4vEj48ve4kI8wA2z4x0Y4vE2Ix0cI8IcVAFwI0_Gr0_Xr1l84ACjcxK6xII jxv20xvEc7CjxVAFwI0_Gr1j6F4UJwA2z4x0Y4vEx4A2jsIE14v26r4UJVWxJr1l84ACjc xK6I8E87Iv6xkF7I0E14v26rxl6s0DM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVAC Y4xI64kE6c02F40Ex7xfMcIj6xIIjxv20xvE14v26r106r15McIj6I8E87Iv67AKxVW8JV WxJwAm72CE4IkC6x0Yz7v_Jr0_Gr1lF7xvr2IYc2Ij64vIr41lc7CjxVAaw2AFwI0_Jw0_ GFylc2xSY4AK67AK6r45MxAIw28IcxkI7VAKI48JMxC20s026xCaFVCjc4AY6r1j6r4UMI 8I3I0E5I8CrVAFwI0_Jr0_Jr4lx2IqxVCjr7xvwVAFwI0_JrI_JrWlx4CE17CEb7AF67AK xVWUtVW8ZwCIc40Y0x0EwIxGrwCI42IY6xIIjxv20xvE14v26r1j6r1xMIIF0xvE2Ix0cI 8IcVCY1x0267AKxVW8JVWxJwCI42IY6xAIw20EY4v20xvaj40_Jr0_JF4lIxAIcVC2z280 aVAFwI0_Jr0_Gr1lIxAIcVC2z280aVCY1x0267AKxVW8JVW8JrUvcSsGvfC2KfnxnUUI43 ZEXa7IU8u6wtUUUUU== X-Originating-IP: [210.73.53.31] X-CM-SenderInfo: x2kd0wxfkx051dq6x2xfdvhtffof0/1tbiBwwPB2apggyjfAAAsd X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240730_210612_288607_7E5151C4 X-CRM114-Status: UNSURE ( 8.77 ) X-CRM114-Notice: Please train this message. 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 This patchset adds soft dirty and userfaultfd write protect tracking support for RISC-V. As described in the patches, we are trying to utilize only one free PTE bit to support three kernel features (devmap, soft-dirty,uffd-wp). Users cannot have them supported at the same time (have to select one when building the kernel). This patchset has been tested with: 1) The kselftest mm suite in which soft-dirty, madv_populate, test_unmerge_uffd_wp, and uffd-unit-tests run and pass, and no regressions are observed in any of the other tests. 2) CRIU: - 'criu check --feature mem_dirty_track' returns supported - incremental_dumps works fine - zdtm test suite can run under host mode V1 -> V2: - Add uffd-wp supported; - Make soft-dirty uffd-wp and devmap mutually exclusive which all use the same PTE bit; - Add test results of CRIU in the cover-letter. Chunyan Zhang (3): riscv: mm: Prepare for reuse PTE RSW bit(9) riscv: mm: Add soft-dirty page tracking support riscv: mm: Add uffd write-protect support arch/riscv/Kconfig | 34 ++++++- arch/riscv/include/asm/pgtable-64.h | 2 +- arch/riscv/include/asm/pgtable-bits.h | 31 ++++++ arch/riscv/include/asm/pgtable.h | 132 +++++++++++++++++++++++++- 4 files changed, 196 insertions(+), 3 deletions(-)