From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.8 required=3.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED,DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D0755C433DF for ; Mon, 10 Aug 2020 02:28:22 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 7C0B22068F for ; Mon, 10 Aug 2020 02:28:22 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="nzm2mSWg" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7C0B22068F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 21C3A6B0006; Sun, 9 Aug 2020 22:28:22 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 1CB648D0007; Sun, 9 Aug 2020 22:28:22 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 094908D0006; Sun, 9 Aug 2020 22:28:22 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0038.hostedemail.com [216.40.44.38]) by kanga.kvack.org (Postfix) with ESMTP id E92AB6B0006 for ; Sun, 9 Aug 2020 22:28:21 -0400 (EDT) Received: from smtpin03.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id B0621248E for ; Mon, 10 Aug 2020 02:28:21 +0000 (UTC) X-FDA: 77133074802.03.size43_6215d6626fd6 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin03.hostedemail.com (Postfix) with ESMTP id 86C8728A4E8 for ; Mon, 10 Aug 2020 02:28:21 +0000 (UTC) X-HE-Tag: size43_6215d6626fd6 X-Filterd-Recvd-Size: 14966 Received: from mail-pj1-f67.google.com (mail-pj1-f67.google.com [209.85.216.67]) by imf38.hostedemail.com (Postfix) with ESMTP for ; Mon, 10 Aug 2020 02:28:21 +0000 (UTC) Received: by mail-pj1-f67.google.com with SMTP id 2so4010813pjx.5 for ; Sun, 09 Aug 2020 19:28:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=n6u3W3xGRvE1f9TahLPt2tr1kQk4naizqZpWLpaJwxQ=; b=nzm2mSWgcF2C9f99wzi08Ql2QMVmUWsm29f5O5eBDvlRDzhbWguvvk0MLq14Jov9pL J3gyMa5yXaJWzK0BWQO6lRlBa1bAT/MndVEYllh7nk8KvX5NPUsDu06EltSLVrFDfBXJ Et472wbuMqXYBIG9zaM6d1eD8MopnUtlFa6K1izrDGSSfVay3hgRh5mY06XRwIwemtNm Dl/LWPGUFXUFy9KiGA2KFg4ZtSs6m6WNtmEG0+CQi0ea31POZD4rulroMY1atOaH6bmn JTmyFDX0To2jEHBYI8X667VaPiCbVWrE803eS7YxuYsC4QX8PoaXRISjM3WXMiLtcIiM /K6g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=n6u3W3xGRvE1f9TahLPt2tr1kQk4naizqZpWLpaJwxQ=; b=QosHx3hP4Frnodb2ylx8diVwm5Wdt91Es1ETJLDQ4hIcs+ZquDOFAhHl+Fi+kkCP5u uUpzBRQXfh9pi4kCZZ+u+J+0x1CHW/DjhBsGm6rrlKX6BnRTD1qw7zM9AVgMiOvtVdm/ y2ahG8CK5zBzk5JpZAqotSxblCnX5I/akvXWgdc7w2GpFQMiNnJ1xlVDhBV1pSEvDwUX vJ4O7BfTi+n5AwqZCeq8p7v1Nsjv/s3WiIGIWdOXr6ETv/O42AKyH+zVg1mXz7d/F2VI qQPJX8QcXUMpsSNN/T7RGnWAJV2jPcy5ykQlu8mRqFqBLprYQTPpD4vWeGijB3xHrU2W Pg5Q== X-Gm-Message-State: AOAM5302BtGyUbcKyFoBXf+s3Wve4TvMGymlTInwNfzfFgwTEkifedUD u0GalwTtLIzcP+0uctnER77ifgT5 X-Google-Smtp-Source: ABdhPJysgrcVwNeIzX0wpzRpCYPA89SKM60P0U1p8K/OIM8Od7oilhb+Ai1vknhvluUYAT5wjCLY/w== X-Received: by 2002:a17:90a:ff0e:: with SMTP id ce14mr25645781pjb.128.1597026500019; Sun, 09 Aug 2020 19:28:20 -0700 (PDT) Received: from bobo.ibm.com (193-116-100-32.tpgi.com.au. [193.116.100.32]) by smtp.gmail.com with ESMTPSA id l17sm21863475pff.126.2020.08.09.19.28.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 09 Aug 2020 19:28:19 -0700 (PDT) From: Nicholas Piggin To: linux-mm@kvack.org Cc: Nicholas Piggin , linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, Catalin Marinas , Will Deacon , linux-arm-kernel@lists.infradead.org, Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, "H. Peter Anvin" , Zefan Li Subject: [PATCH v3 6/8] mm: Move vmap_range from lib/ioremap.c to mm/vmalloc.c Date: Mon, 10 Aug 2020 12:27:30 +1000 Message-Id: <20200810022732.1150009-7-npiggin@gmail.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20200810022732.1150009-1-npiggin@gmail.com> References: <20200810022732.1150009-1-npiggin@gmail.com> MIME-Version: 1.0 X-Rspamd-Queue-Id: 86C8728A4E8 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam03 Content-Transfer-Encoding: quoted-printable 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: This is a generic kernel virtual memory mapper, not specific to ioremap. Signed-off-by: Nicholas Piggin --- include/linux/vmalloc.h | 2 + mm/ioremap.c | 192 ---------------------------------------- mm/vmalloc.c | 191 +++++++++++++++++++++++++++++++++++++++ 3 files changed, 193 insertions(+), 192 deletions(-) diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h index 787d77ad7536..e3590e93bfff 100644 --- a/include/linux/vmalloc.h +++ b/include/linux/vmalloc.h @@ -181,6 +181,8 @@ extern struct vm_struct *remove_vm_area(const void *a= ddr); extern struct vm_struct *find_vm_area(const void *addr); =20 #ifdef CONFIG_MMU +extern int vmap_range(unsigned long addr, unsigned long end, phys_addr_t= phys_addr, pgprot_t prot, + unsigned int max_page_shift); extern int map_kernel_range_noflush(unsigned long start, unsigned long s= ize, pgprot_t prot, struct page **pages); int map_kernel_range(unsigned long start, unsigned long size, pgprot_t p= rot, diff --git a/mm/ioremap.c b/mm/ioremap.c index b0032dbadaf7..cdda0e022740 100644 --- a/mm/ioremap.c +++ b/mm/ioremap.c @@ -28,198 +28,6 @@ early_param("nohugeiomap", set_nohugeiomap); static const bool iomap_allow_huge =3D false; #endif /* CONFIG_HAVE_ARCH_HUGE_VMAP */ =20 -static int vmap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long = end, - phys_addr_t phys_addr, pgprot_t prot, pgtbl_mod_mask *mask) -{ - pte_t *pte; - u64 pfn; - - pfn =3D phys_addr >> PAGE_SHIFT; - pte =3D pte_alloc_kernel_track(pmd, addr, mask); - if (!pte) - return -ENOMEM; - do { - BUG_ON(!pte_none(*pte)); - set_pte_at(&init_mm, addr, pte, pfn_pte(pfn, prot)); - pfn++; - } while (pte++, addr +=3D PAGE_SIZE, addr !=3D end); - *mask |=3D PGTBL_PTE_MODIFIED; - return 0; -} - -static int vmap_try_huge_pmd(pmd_t *pmd, unsigned long addr, unsigned lo= ng end, - phys_addr_t phys_addr, pgprot_t prot, unsigned int max_page_shift) -{ - if (max_page_shift < PMD_SHIFT) - return 0; - - if (!arch_vmap_pmd_supported(prot)) - return 0; - - if ((end - addr) !=3D PMD_SIZE) - return 0; - - if (!IS_ALIGNED(addr, PMD_SIZE)) - return 0; - - if (!IS_ALIGNED(phys_addr, PMD_SIZE)) - return 0; - - if (pmd_present(*pmd) && !pmd_free_pte_page(pmd, addr)) - return 0; - - return pmd_set_huge(pmd, phys_addr, prot); -} - -static int vmap_pmd_range(pud_t *pud, unsigned long addr, unsigned long = end, - phys_addr_t phys_addr, pgprot_t prot, unsigned int max_page_shift, - pgtbl_mod_mask *mask) -{ - pmd_t *pmd; - unsigned long next; - - pmd =3D pmd_alloc_track(&init_mm, pud, addr, mask); - if (!pmd) - return -ENOMEM; - do { - next =3D pmd_addr_end(addr, end); - - if (vmap_try_huge_pmd(pmd, addr, next, phys_addr, prot, max_page_shift= )) { - *mask |=3D PGTBL_PMD_MODIFIED; - continue; - } - - if (vmap_pte_range(pmd, addr, next, phys_addr, prot, mask)) - return -ENOMEM; - } while (pmd++, phys_addr +=3D (next - addr), addr =3D next, addr !=3D = end); - return 0; -} - -static int vmap_try_huge_pud(pud_t *pud, unsigned long addr, unsigned lo= ng end, - phys_addr_t phys_addr, pgprot_t prot, unsigned int max_page_shift) -{ - if (max_page_shift < PUD_SHIFT) - return 0; - - if (!arch_vmap_pud_supported(prot)) - return 0; - - if ((end - addr) !=3D PUD_SIZE) - return 0; - - if (!IS_ALIGNED(addr, PUD_SIZE)) - return 0; - - if (!IS_ALIGNED(phys_addr, PUD_SIZE)) - return 0; - - if (pud_present(*pud) && !pud_free_pmd_page(pud, addr)) - return 0; - - return pud_set_huge(pud, phys_addr, prot); -} - -static int vmap_pud_range(p4d_t *p4d, unsigned long addr, unsigned long = end, - phys_addr_t phys_addr, pgprot_t prot, unsigned int max_page_shift, - pgtbl_mod_mask *mask) -{ - pud_t *pud; - unsigned long next; - - pud =3D pud_alloc_track(&init_mm, p4d, addr, mask); - if (!pud) - return -ENOMEM; - do { - next =3D pud_addr_end(addr, end); - - if (vmap_try_huge_pud(pud, addr, next, phys_addr, prot, max_page_shift= )) { - *mask |=3D PGTBL_PUD_MODIFIED; - continue; - } - - if (vmap_pmd_range(pud, addr, next, phys_addr, prot, max_page_shift, m= ask)) - return -ENOMEM; - } while (pud++, phys_addr +=3D (next - addr), addr =3D next, addr !=3D = end); - return 0; -} - -static int vmap_try_huge_p4d(p4d_t *p4d, unsigned long addr, unsigned lo= ng end, - phys_addr_t phys_addr, pgprot_t prot, unsigned int max_page_shift) -{ - if (max_page_shift < P4D_SHIFT) - return 0; - - if (!arch_vmap_p4d_supported(prot)) - return 0; - - if ((end - addr) !=3D P4D_SIZE) - return 0; - - if (!IS_ALIGNED(addr, P4D_SIZE)) - return 0; - - if (!IS_ALIGNED(phys_addr, P4D_SIZE)) - return 0; - - if (p4d_present(*p4d) && !p4d_free_pud_page(p4d, addr)) - return 0; - - return p4d_set_huge(p4d, phys_addr, prot); -} - -static int vmap_p4d_range(pgd_t *pgd, unsigned long addr, unsigned long = end, - phys_addr_t phys_addr, pgprot_t prot, unsigned int max_page_shift, - pgtbl_mod_mask *mask) -{ - p4d_t *p4d; - unsigned long next; - - p4d =3D p4d_alloc_track(&init_mm, pgd, addr, mask); - if (!p4d) - return -ENOMEM; - do { - next =3D p4d_addr_end(addr, end); - - if (vmap_try_huge_p4d(p4d, addr, next, phys_addr, prot, max_page_shift= )) { - *mask |=3D PGTBL_P4D_MODIFIED; - continue; - } - - if (vmap_pud_range(p4d, addr, next, phys_addr, prot, max_page_shift, m= ask)) - return -ENOMEM; - } while (p4d++, phys_addr +=3D (next - addr), addr =3D next, addr !=3D = end); - return 0; -} - -static int vmap_range(unsigned long addr, unsigned long end, phys_addr_t= phys_addr, pgprot_t prot, - unsigned int max_page_shift) -{ - pgd_t *pgd; - unsigned long start; - unsigned long next; - int err; - pgtbl_mod_mask mask =3D 0; - - might_sleep(); - BUG_ON(addr >=3D end); - - start =3D addr; - pgd =3D pgd_offset_k(addr); - do { - next =3D pgd_addr_end(addr, end); - err =3D vmap_p4d_range(pgd, addr, next, phys_addr, prot, max_page_shif= t, &mask); - if (err) - break; - } while (pgd++, phys_addr +=3D (next - addr), addr =3D next, addr !=3D = end); - - flush_cache_vmap(start, end); - - if (mask & ARCH_PAGE_TABLE_SYNC_MASK) - arch_sync_kernel_mappings(start, end); - - return err; -} - int ioremap_page_range(unsigned long addr, unsigned long end, phys_addr_= t phys_addr, pgprot_t prot) { unsigned int max_page_shift =3D PAGE_SHIFT; diff --git a/mm/vmalloc.c b/mm/vmalloc.c index 3a1e45fd1626..129f10545bb1 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -71,6 +71,197 @@ static void free_work(struct work_struct *w) } =20 /*** Page table manipulation functions ***/ +static int vmap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long = end, + phys_addr_t phys_addr, pgprot_t prot, pgtbl_mod_mask *mask) +{ + pte_t *pte; + u64 pfn; + + pfn =3D phys_addr >> PAGE_SHIFT; + pte =3D pte_alloc_kernel_track(pmd, addr, mask); + if (!pte) + return -ENOMEM; + do { + BUG_ON(!pte_none(*pte)); + set_pte_at(&init_mm, addr, pte, pfn_pte(pfn, prot)); + pfn++; + } while (pte++, addr +=3D PAGE_SIZE, addr !=3D end); + *mask |=3D PGTBL_PTE_MODIFIED; + return 0; +} + +static int vmap_try_huge_pmd(pmd_t *pmd, unsigned long addr, unsigned lo= ng end, + phys_addr_t phys_addr, pgprot_t prot, unsigned int max_page_shift) +{ + if (max_page_shift < PMD_SHIFT) + return 0; + + if (!arch_vmap_pmd_supported(prot)) + return 0; + + if ((end - addr) !=3D PMD_SIZE) + return 0; + + if (!IS_ALIGNED(addr, PMD_SIZE)) + return 0; + + if (!IS_ALIGNED(phys_addr, PMD_SIZE)) + return 0; + + if (pmd_present(*pmd) && !pmd_free_pte_page(pmd, addr)) + return 0; + + return pmd_set_huge(pmd, phys_addr, prot); +} + +static int vmap_pmd_range(pud_t *pud, unsigned long addr, unsigned long = end, + phys_addr_t phys_addr, pgprot_t prot, unsigned int max_page_shift, + pgtbl_mod_mask *mask) +{ + pmd_t *pmd; + unsigned long next; + + pmd =3D pmd_alloc_track(&init_mm, pud, addr, mask); + if (!pmd) + return -ENOMEM; + do { + next =3D pmd_addr_end(addr, end); + + if (vmap_try_huge_pmd(pmd, addr, next, phys_addr, prot, max_page_shift= )) { + *mask |=3D PGTBL_PMD_MODIFIED; + continue; + } + + if (vmap_pte_range(pmd, addr, next, phys_addr, prot, mask)) + return -ENOMEM; + } while (pmd++, phys_addr +=3D (next - addr), addr =3D next, addr !=3D = end); + return 0; +} + +static int vmap_try_huge_pud(pud_t *pud, unsigned long addr, unsigned lo= ng end, + phys_addr_t phys_addr, pgprot_t prot, unsigned int max_page_shift) +{ + if (max_page_shift < PUD_SHIFT) + return 0; + + if (!arch_vmap_pud_supported(prot)) + return 0; + + if ((end - addr) !=3D PUD_SIZE) + return 0; + + if (!IS_ALIGNED(addr, PUD_SIZE)) + return 0; + + if (!IS_ALIGNED(phys_addr, PUD_SIZE)) + return 0; + + if (pud_present(*pud) && !pud_free_pmd_page(pud, addr)) + return 0; + + return pud_set_huge(pud, phys_addr, prot); +} + +static int vmap_pud_range(p4d_t *p4d, unsigned long addr, unsigned long = end, + phys_addr_t phys_addr, pgprot_t prot, unsigned int max_page_shift, + pgtbl_mod_mask *mask) +{ + pud_t *pud; + unsigned long next; + + pud =3D pud_alloc_track(&init_mm, p4d, addr, mask); + if (!pud) + return -ENOMEM; + do { + next =3D pud_addr_end(addr, end); + + if (vmap_try_huge_pud(pud, addr, next, phys_addr, prot, max_page_shift= )) { + *mask |=3D PGTBL_PUD_MODIFIED; + continue; + } + + if (vmap_pmd_range(pud, addr, next, phys_addr, prot, max_page_shift, m= ask)) + return -ENOMEM; + } while (pud++, phys_addr +=3D (next - addr), addr =3D next, addr !=3D = end); + return 0; +} + +static int vmap_try_huge_p4d(p4d_t *p4d, unsigned long addr, unsigned lo= ng end, + phys_addr_t phys_addr, pgprot_t prot, unsigned int max_page_shift) +{ + if (max_page_shift < P4D_SHIFT) + return 0; + + if (!arch_vmap_p4d_supported(prot)) + return 0; + + if ((end - addr) !=3D P4D_SIZE) + return 0; + + if (!IS_ALIGNED(addr, P4D_SIZE)) + return 0; + + if (!IS_ALIGNED(phys_addr, P4D_SIZE)) + return 0; + + if (p4d_present(*p4d) && !p4d_free_pud_page(p4d, addr)) + return 0; + + return p4d_set_huge(p4d, phys_addr, prot); +} + +static int vmap_p4d_range(pgd_t *pgd, unsigned long addr, unsigned long = end, + phys_addr_t phys_addr, pgprot_t prot, unsigned int max_page_shift, + pgtbl_mod_mask *mask) +{ + p4d_t *p4d; + unsigned long next; + + p4d =3D p4d_alloc_track(&init_mm, pgd, addr, mask); + if (!p4d) + return -ENOMEM; + do { + next =3D p4d_addr_end(addr, end); + + if (vmap_try_huge_p4d(p4d, addr, next, phys_addr, prot, max_page_shift= )) { + *mask |=3D PGTBL_P4D_MODIFIED; + continue; + } + + if (vmap_pud_range(p4d, addr, next, phys_addr, prot, max_page_shift, m= ask)) + return -ENOMEM; + } while (p4d++, phys_addr +=3D (next - addr), addr =3D next, addr !=3D = end); + return 0; +} + +int vmap_range(unsigned long addr, unsigned long end, phys_addr_t phys_a= ddr, pgprot_t prot, + unsigned int max_page_shift) +{ + pgd_t *pgd; + unsigned long start; + unsigned long next; + int err; + pgtbl_mod_mask mask =3D 0; + + might_sleep(); + BUG_ON(addr >=3D end); + + start =3D addr; + pgd =3D pgd_offset_k(addr); + do { + next =3D pgd_addr_end(addr, end); + err =3D vmap_p4d_range(pgd, addr, next, phys_addr, prot, max_page_shif= t, &mask); + if (err) + break; + } while (pgd++, phys_addr +=3D (next - addr), addr =3D next, addr !=3D = end); + + flush_cache_vmap(start, end); + + if (mask & ARCH_PAGE_TABLE_SYNC_MASK) + arch_sync_kernel_mappings(start, end); + + return err; +} =20 static void vunmap_pte_range(pmd_t *pmd, unsigned long addr, unsigned lo= ng end, pgtbl_mod_mask *mask) --=20 2.23.0