From patchwork Mon May 1 19:28:10 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vishal Moola X-Patchwork-Id: 13227981 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 C66FFC7EE2E for ; Mon, 1 May 2023 19:30:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233713AbjEATaQ (ORCPT ); Mon, 1 May 2023 15:30:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56974 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233459AbjEAT3m (ORCPT ); Mon, 1 May 2023 15:29:42 -0400 Received: from mail-pl1-x62f.google.com (mail-pl1-x62f.google.com [IPv6:2607:f8b0:4864:20::62f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 30EF12D43; Mon, 1 May 2023 12:29:07 -0700 (PDT) Received: by mail-pl1-x62f.google.com with SMTP id d9443c01a7336-1aae46e62e9so14577895ad.2; Mon, 01 May 2023 12:29:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1682969335; x=1685561335; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=/Q5rpHIbLtPdsxzDzaO3buqXOd2yqrT0Z007lfiZkpI=; b=AxAga4aoXPNlXE7+DeUiTXETzfeeCHbm4zGppPqr1MDTZFxhWAViYrGbWyE6GLWt+9 IB0rpQEMaD7N9ypKiOPbsaINcslUNsYjGQTG5q5vWeCnFZgA7dcIKUsRPd84RGXai5h1 l16CjSDmsfosD9KMmdT6xq8VRCXKZ9G6YKbNHAZjIZoU/NfYHkwEKIBnMm9mpAHGxSXg 2woYY+DxDFTOnXL4g3fftw/6LCcjY+gzdniMaWURcfFDuyLcW5IhoWI0SL4yBh+tQBiv tdoOcx5iHNlwMY/jUOXeVBpbt3BPtJyBIMif2r3nZba5xvX4tcuGQGviD0d/uLbj9ohj JJbQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1682969335; x=1685561335; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=/Q5rpHIbLtPdsxzDzaO3buqXOd2yqrT0Z007lfiZkpI=; b=GUE9kddDqoLk4wZkil/zTXFCVlIEg8d+8T4HgmTaP1ucPmt+yOVKkxqlVpvitBz3yV g0VmU2/GX8XTKLsdjgZnXDsnkpN/FYK/s6KpNWHJTXGF0kVuwS8JtL62lLtMy+k9h3Sf v4GFUJPpK9COyelOgrO9WeOb06+agE/EN+Tx/Pq6NAY6eQTsgQyk4ARpPXMt8PV60vF4 yI8E7B+jTAg8IX6Uv1aD7mRVcZaLfafin9ip6YtxO8k7rYpROXt47dg+ImGl85eUMUKB HcbvlvgF7PADji/xIRFoLbgAJSipuL2p6HrCCQX5gQwpPqZUdkLnfHtgR+SzsxfbBL+0 541Q== X-Gm-Message-State: AC+VfDwE8W1KgdmmjF5KmEOUG/atLNdbnwqWlc3apy+NhaMwQpEAl6oP vwrb+eBsWiU172uGy7yz4Xg= X-Google-Smtp-Source: ACHHUZ70tPtnwybaj+jIE0QGoYPcdHCYjv99qqOX/zc6uUXZ1o0XGtKwgumEUC29ZoX/UBhdbXOt+g== X-Received: by 2002:a17:903:41d0:b0:1ab:12a:bd2e with SMTP id u16-20020a17090341d000b001ab012abd2emr2887995ple.37.1682969334945; Mon, 01 May 2023 12:28:54 -0700 (PDT) Received: from fedora.hsd1.ca.comcast.net ([2601:644:937f:7f20::9a2c]) by smtp.googlemail.com with ESMTPSA id u8-20020a170902bf4800b0019c13d032d8sm18175622pls.253.2023.05.01.12.28.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 01 May 2023 12:28:54 -0700 (PDT) From: "Vishal Moola (Oracle)" To: Andrew Morton , Matthew Wilcox Cc: linux-mm@kvack.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-openrisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, xen-devel@lists.xenproject.org, kvm@vger.kernel.org, "Vishal Moola (Oracle)" , Dave Hansen Subject: [PATCH v2 15/34] x86: Convert various functions to use ptdescs Date: Mon, 1 May 2023 12:28:10 -0700 Message-Id: <20230501192829.17086-16-vishal.moola@gmail.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230501192829.17086-1-vishal.moola@gmail.com> References: <20230501192829.17086-1-vishal.moola@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org In order to split struct ptdesc from struct page, convert various functions to use ptdescs. Some of the functions use the *get*page*() helper functions. Convert these to use ptdesc_alloc() and ptdesc_address() instead to help standardize page tables further. Signed-off-by: Vishal Moola (Oracle) --- arch/x86/mm/pgtable.c | 46 +++++++++++++++++++++++++------------------ 1 file changed, 27 insertions(+), 19 deletions(-) diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c index afab0bc7862b..9b6f81c8eb32 100644 --- a/arch/x86/mm/pgtable.c +++ b/arch/x86/mm/pgtable.c @@ -52,7 +52,7 @@ early_param("userpte", setup_userpte); void ___pte_free_tlb(struct mmu_gather *tlb, struct page *pte) { - pgtable_pte_page_dtor(pte); + ptdesc_pte_dtor(page_ptdesc(pte)); paravirt_release_pte(page_to_pfn(pte)); paravirt_tlb_remove_table(tlb, pte); } @@ -60,7 +60,7 @@ void ___pte_free_tlb(struct mmu_gather *tlb, struct page *pte) #if CONFIG_PGTABLE_LEVELS > 2 void ___pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd) { - struct page *page = virt_to_page(pmd); + struct ptdesc *ptdesc = virt_to_ptdesc(pmd); paravirt_release_pmd(__pa(pmd) >> PAGE_SHIFT); /* * NOTE! For PAE, any changes to the top page-directory-pointer-table @@ -69,8 +69,8 @@ void ___pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd) #ifdef CONFIG_X86_PAE tlb->need_flush_all = 1; #endif - pgtable_pmd_page_dtor(page); - paravirt_tlb_remove_table(tlb, page); + ptdesc_pmd_dtor(ptdesc); + paravirt_tlb_remove_table(tlb, ptdesc_page(ptdesc)); } #if CONFIG_PGTABLE_LEVELS > 3 @@ -92,16 +92,16 @@ void ___p4d_free_tlb(struct mmu_gather *tlb, p4d_t *p4d) static inline void pgd_list_add(pgd_t *pgd) { - struct page *page = virt_to_page(pgd); + struct ptdesc *ptdesc = virt_to_ptdesc(pgd); - list_add(&page->lru, &pgd_list); + list_add(&ptdesc->pt_list, &pgd_list); } static inline void pgd_list_del(pgd_t *pgd) { - struct page *page = virt_to_page(pgd); + struct ptdesc *ptdesc = virt_to_ptdesc(pgd); - list_del(&page->lru); + list_del(&ptdesc->pt_list); } #define UNSHARED_PTRS_PER_PGD \ @@ -112,12 +112,12 @@ static inline void pgd_list_del(pgd_t *pgd) static void pgd_set_mm(pgd_t *pgd, struct mm_struct *mm) { - virt_to_page(pgd)->pt_mm = mm; + virt_to_ptdesc(pgd)->pt_mm = mm; } struct mm_struct *pgd_page_get_mm(struct page *page) { - return page->pt_mm; + return page_ptdesc(page)->pt_mm; } static void pgd_ctor(struct mm_struct *mm, pgd_t *pgd) @@ -213,11 +213,14 @@ void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmd) static void free_pmds(struct mm_struct *mm, pmd_t *pmds[], int count) { int i; + struct ptdesc *ptdesc; for (i = 0; i < count; i++) if (pmds[i]) { - pgtable_pmd_page_dtor(virt_to_page(pmds[i])); - free_page((unsigned long)pmds[i]); + ptdesc = virt_to_ptdesc(pmds[i]); + + ptdesc_pmd_dtor(ptdesc); + ptdesc_free(ptdesc); mm_dec_nr_pmds(mm); } } @@ -232,16 +235,21 @@ static int preallocate_pmds(struct mm_struct *mm, pmd_t *pmds[], int count) gfp &= ~__GFP_ACCOUNT; for (i = 0; i < count; i++) { - pmd_t *pmd = (pmd_t *)__get_free_page(gfp); - if (!pmd) + pmd_t *pmd = NULL; + struct ptdesc *ptdesc = ptdesc_alloc(gfp, 0); + + if (!ptdesc) failed = true; - if (pmd && !pgtable_pmd_page_ctor(virt_to_page(pmd))) { - free_page((unsigned long)pmd); - pmd = NULL; + if (ptdesc && !ptdesc_pmd_ctor(ptdesc)) { + ptdesc_free(ptdesc); + ptdesc = NULL; failed = true; } - if (pmd) + if (ptdesc) { mm_inc_nr_pmds(mm); + pmd = (pmd_t *)ptdesc_address(ptdesc); + } + pmds[i] = pmd; } @@ -838,7 +846,7 @@ int pud_free_pmd_page(pud_t *pud, unsigned long addr) free_page((unsigned long)pmd_sv); - pgtable_pmd_page_dtor(virt_to_page(pmd)); + ptdesc_pmd_dtor(virt_to_ptdesc(pmd)); free_page((unsigned long)pmd); return 1;