From nobody Fri Dec 19 07:18:08 2025 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 65A1FC04AA5 for ; Thu, 25 Aug 2022 10:12:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241182AbiHYKMr (ORCPT ); Thu, 25 Aug 2022 06:12:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58444 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241029AbiHYKMT (ORCPT ); Thu, 25 Aug 2022 06:12:19 -0400 Received: from mail-pl1-x62d.google.com (mail-pl1-x62d.google.com [IPv6:2607:f8b0:4864:20::62d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9FBDCA7A82 for ; Thu, 25 Aug 2022 03:12:07 -0700 (PDT) Received: by mail-pl1-x62d.google.com with SMTP id jm11so18083870plb.13 for ; Thu, 25 Aug 2022 03:12:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance-com.20210112.gappssmtp.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc; bh=N/hACB6DJOnbW9YdcxCL4bYdw5iH8tr2HnsmRUbA/2k=; b=QK9DEIvE1XdTmyK0lBvfluXy8RYM/LAWM6lwGwePhGiIuALjqlWe153rtG2hWbimgP tADUbPJWllZwAGBl6q1qMoG7GiVV4Zxg5mCWYr5gpaptx+0cYenTa8MYu8BxylD1BYIR MuGpFgTWwlSreVJQ1YFHSoT6iayMMrkysAJwtTyc5sV4ffpifFreiRkvBdACM872Q6tU dkOoQSesVJHmEDw19sbAyC6q21uVp3rx9VXqWv5ZjPzjubyss70MeyGWM9AFYgnuU659 NiJrSv8GF1blOGvs/AogG2NrOnNaFsFxF+R6PRJfQ+I+YGspLrVxAViyyr0Bm4Nd080+ d75g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc; bh=N/hACB6DJOnbW9YdcxCL4bYdw5iH8tr2HnsmRUbA/2k=; b=fn/bJzgZgUcoKyIuOCNZ/krMIdaXpng9nAH/L0WHLjKdNa8a13Q6jYEK6lWTXqIyBF GXmMNKfOrnBInBMcuqI+Nbxb0qQH0aRwfckQ56nhaKrLEm0kUzW3u/qjqLqFlLAbvjHn B83VqWwSCtBqcftHy0NkRE5k/OAVs7NUjvK/ExAraAH+aBSkGga564Bdy2CZKE5BWkvO Xv0ZTlFlX45lTWrb7SEi7De549O/KjD22uiblGC8Nqn0qhL0GTpqlAy5FXmqXS0rbfGz yPVxQ1FvjATZLkmNrATXZTF10aPTCQR0FtDw4ZZC+h1wCvTixHiNftqt+4gSo+/4Freq S8jA== X-Gm-Message-State: ACgBeo2VQlBP1V+wT81kDBzfRn88Tx3hdkBbNU80JyuHLlScqP4tL/Aj 8hZCDsvJ+KRKjVGnwfsBctk3Kg== X-Google-Smtp-Source: AA6agR5cOXU69J240S/HoYf6HtB5GQPmumANKU1IMKISK6IYS4mPO26cn0vvNtm0snnl5pnh+tc46Q== X-Received: by 2002:a17:90b:2496:b0:1ef:a94:7048 with SMTP id nt22-20020a17090b249600b001ef0a947048mr3877401pjb.244.1661422326951; Thu, 25 Aug 2022 03:12:06 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([139.177.225.234]) by smtp.gmail.com with ESMTPSA id b10-20020a170903228a00b001714c36a6e7sm8477581plh.284.2022.08.25.03.12.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 25 Aug 2022 03:12:06 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@redhat.com, kirill.shutemov@linux.intel.com, mika.penttila@nextfour.com, jgg@nvidia.com, tglx@linutronix.de, willy@infradead.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, muchun.song@linux.dev, Qi Zheng Subject: [RFC PATCH 6/7] x86/mm: add x86_64 support for pte_ref Date: Thu, 25 Aug 2022 18:10:36 +0800 Message-Id: <20220825101037.96517-7-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20220825101037.96517-1-zhengqi.arch@bytedance.com> References: <20220825101037.96517-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Add pte_ref hooks into routines that modify user PTE page tables, and select ARCH_SUPPORTS_FREE_USER_PTE, so that the pte_ref code can be compiled and worked on this architecture. Signed-off-by: Qi Zheng --- arch/x86/Kconfig | 1 + arch/x86/include/asm/pgtable.h | 4 ++++ include/linux/pgtable.h | 1 + 3 files changed, 6 insertions(+) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 52a7f91527fe..50215b05723e 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -34,6 +34,7 @@ config X86_64 select SWIOTLB select ARCH_HAS_ELFCORE_COMPAT select ZONE_DMA32 + select ARCH_SUPPORTS_FREE_USER_PTE =20 config FORCE_DYNAMIC_FTRACE def_bool y diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h index 44e2d6f1dbaa..cbfcfa497fb9 100644 --- a/arch/x86/include/asm/pgtable.h +++ b/arch/x86/include/asm/pgtable.h @@ -23,6 +23,7 @@ #include #include #include +#include =20 extern pgd_t early_top_pgt[PTRS_PER_PGD]; bool __init __early_make_pgtable(unsigned long address, pmdval_t pmd); @@ -1005,6 +1006,7 @@ static inline void set_pte_at(struct mm_struct *mm, u= nsigned long addr, pte_t *ptep, pte_t pte) { page_table_check_pte_set(mm, addr, ptep, pte); + track_pte_set(mm, addr, ptep, pte); set_pte(ptep, pte); } =20 @@ -1050,6 +1052,7 @@ static inline pte_t ptep_get_and_clear(struct mm_stru= ct *mm, unsigned long addr, { pte_t pte =3D native_ptep_get_and_clear(ptep); page_table_check_pte_clear(mm, addr, pte); + track_pte_clear(mm, addr, ptep, pte); return pte; } =20 @@ -1066,6 +1069,7 @@ static inline pte_t ptep_get_and_clear_full(struct mm= _struct *mm, */ pte =3D native_local_ptep_get_and_clear(ptep); page_table_check_pte_clear(mm, addr, pte); + track_pte_clear(mm, addr, ptep, pte); } else { pte =3D ptep_get_and_clear(mm, addr, ptep); } diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h index c4a6bda6e965..908636f48c95 100644 --- a/include/linux/pgtable.h +++ b/include/linux/pgtable.h @@ -276,6 +276,7 @@ static inline pte_t ptep_get_and_clear(struct mm_struct= *mm, pte_t pte =3D *ptep; pte_clear(mm, address, ptep); page_table_check_pte_clear(mm, address, pte); + track_pte_clear(mm, address, ptep, pte); return pte; } #endif --=20 2.20.1