From patchwork Mon Aug 5 09:52:40 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chunyan Zhang X-Patchwork-Id: 13753378 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 DA67BC3DA7F for ; Mon, 5 Aug 2024 09:54:08 +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=GndouvrXbGLF/NMVev+Qhs1Za79+t8MZcDgFIgGcbc8=; b=bOhFDUbs3ozcbq DS6heJGR3figYR4vikr5U/U7SgPOE044p4c3iKGY+HnYPQ4BYWWSNn9h8UATYfBGezJzxS0e4euw+ tvPD4BmkN5ko6xwGa6qOIQmHSd8Y+vId5zanJZtWvRw1LR0hQDDBWTjFmXjPDRDp+UIfYiCPviWs+ XrrKUqzf4qTvMkMuMGNkxrGQ9owoYOteI1tivbZ91A/X79LmFLVEJHvml2klnyg52bBH4VU1LAIQD MLfD72OcRHCk6CNqTkbaOZkTPen6a6TBUQoaOEA44klBswfCUO1kaocdCOf/n3xVBOMIAGXb207gl d9xeXTywsRdyB0E5EBww==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sauPl-0000000FOMI-3RE8; Mon, 05 Aug 2024 09:54:05 +0000 Received: from smtp81.cstnet.cn ([159.226.251.81] helo=cstnet.cn) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sauPg-0000000FOJP-3mhT for linux-riscv@lists.infradead.org; Mon, 05 Aug 2024 09:54:04 +0000 Received: from ubt.. (unknown [210.73.53.31]) by APP-03 (Coremail) with SMTP id rQCowACHjvoJobBmMT6cAw--.14790S2; Mon, 05 Aug 2024 17:53:14 +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 V3 0/3] riscv: mm: Add soft-dirty and uffd-wp support Date: Mon, 5 Aug 2024 17:52:40 +0800 Message-Id: <20240805095243.44809-1-zhangchunyan@iscas.ac.cn> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-CM-TRANSID: rQCowACHjvoJobBmMT6cAw--.14790S2 X-Coremail-Antispam: 1UD129KBjvJXoW7Aw17trWrtr4xKryUZF4UXFb_yoW8XF15pa ySkwn8try5CryIyr4fCr1qgr15X3Wft3s8Cryft34vyw4rWFWUZrnYk3WfJw18X3W29r9Y 93W5Gry5u3ykZaUanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUvSb7Iv0xC_tr1lb4IE77IF4wAFF20E14v26r4j6ryUM7CY07I2 0VC2zVCF04k26cxKx2IYs7xG6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rw A2F7IY1VAKz4vEj48ve4kI8wA2z4x0Y4vE2Ix0cI8IcVAFwI0_Jr0_JF4l84ACjcxK6xII jxv20xvEc7CjxVAFwI0_Gr0_Cr1l84ACjcxK6I8E87Iv67AKxVW8Jr0_Cr1UM28EF7xvwV C2z280aVCY1x0267AKxVW8Jr0_Cr1UM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVAC Y4xI64kE6c02F40Ex7xfMcIj6xIIjxv20xvE14v26r1j6r18McIj6I8E87Iv67AKxVWUJV W8JwAm72CE4IkC6x0Yz7v_Jr0_Gr1lF7xvr2IYc2Ij64vIr41lc7CjxVAaw2AFwI0_JF0_ Jw1lc2xSY4AK67AK6r4fMxAIw28IcxkI7VAKI48JMxC20s026xCaFVCjc4AY6r1j6r4UMI 8I3I0E5I8CrVAFwI0_Jr0_Jr4lx2IqxVCjr7xvwVAFwI0_JrI_JrWlx4CE17CEb7AF67AK xVWUtVW8ZwCIc40Y0x0EwIxGrwCI42IY6xIIjxv20xvE14v26r1j6r1xMIIF0xvE2Ix0cI 8IcVCY1x0267AKxVWUJVW8JwCI42IY6xAIw20EY4v20xvaj40_Jr0_JF4lIxAIcVC2z280 aVAFwI0_Jr0_Gr1lIxAIcVC2z280aVCY1x0267AKxVW8JVW8JrUvcSsGvfC2KfnxnUUI43 ZEXa7IU8KFAPUUUUU== X-Originating-IP: [210.73.53.31] X-CM-SenderInfo: x2kd0wxfkx051dq6x2xfdvhtffof0/1tbiDAgAB2awjLg3zAAAsa X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240805_025401_379274_F1C826B0 X-CRM114-Status: UNSURE ( 9.26 ) 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(9) 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[1] and simple_loop [2] dump and restores work fine; - zdtm test suite can run under host mode. V3: - Fixed the issue reported by kernel test irobot . 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. [1] https://www.criu.org/Incremental_dumps [2] https://asciinema.org/a/232445 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(-)