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Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1j3FA4-00054h-Rn; Sun, 16 Feb 2020 08:20:20 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1j3F9J-0003KD-TQ for linux-arm-kernel@lists.infradead.org; Sun, 16 Feb 2020 08:19:36 +0000 Received: from aquarius.haifa.ibm.com (nesher1.haifa.il.ibm.com [195.110.40.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 8026A206E2; Sun, 16 Feb 2020 08:19:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581841173; bh=F0cCXmb/o7liiZO71D4JlF7q0Z7SA6J4fHvegp69+aU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rBq9D5EOTNL2n6IOAtc3DNc+59sJmevw9INs0JmZ5qXchOxb1gBLusegKMjj1oy17 It+LItcob4cVrN357xTNxEQBRoInKjUeEQCsAn9M8FpfjdWf/lA+t2gNE2u4uAoN3w fYO1ySaLyF9O8d0JM0UTuz62r+615NS1HD/ulQ0Y= From: Mike Rapoport To: linux-kernel@vger.kernel.org Subject: [PATCH v2 04/13] ia64: add support for folded p4d page tables Date: Sun, 16 Feb 2020 10:18:34 +0200 Message-Id: <20200216081843.28670-5-rppt@kernel.org> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20200216081843.28670-1-rppt@kernel.org> References: <20200216081843.28670-1-rppt@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200216_001934_006333_601F6BFF X-CRM114-Status: GOOD ( 15.65 ) X-Spam-Score: -5.2 (-----) X-Spam-Report: SpamAssassin version 3.4.3 on bombadil.infradead.org summary: Content analysis details: (-5.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at https://www.dnswl.org/, high trust [198.145.29.99 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.0 DKIMWL_WL_HIGH DKIMwl.org - Whitelisted High sender X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Rich Felker , linux-ia64@vger.kernel.org, Geert Uytterhoeven , linux-sh@vger.kernel.org, Benjamin Herrenschmidt , linux-mm@kvack.org, Paul Mackerras , linux-hexagon@vger.kernel.org, Will Deacon , kvmarm@lists.cs.columbia.edu, Jonas Bonn , linux-arch@vger.kernel.org, Brian Cain , Marc Zyngier , Russell King , Ley Foon Tan , Mike Rapoport , Catalin Marinas , Julien Thierry , uclinux-h8-devel@lists.sourceforge.jp, Fenghua Yu , Arnd Bergmann , Suzuki K Poulose , kvm-ppc@vger.kernel.org, Stefan Kristiansson , openrisc@lists.librecores.org, Stafford Horne , Guan Xuetao , linux-arm-kernel@lists.infradead.org, Christophe Leroy , Tony Luck , Yoshinori Sato , James Morse , Michael Ellerman , nios2-dev@lists.rocketboards.org, Andrew Morton , linuxppc-dev@lists.ozlabs.org, Mike Rapoport Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org From: Mike Rapoport Implement primitives necessary for the 4th level folding, add walks of p4d level where appropriate, remove usage of __ARCH_USE_5LEVEL_HACK and replace 5level-fixup.h with pgtable-nop4d.h Signed-off-by: Mike Rapoport --- arch/ia64/include/asm/pgalloc.h | 4 ++-- arch/ia64/include/asm/pgtable.h | 17 ++++++++--------- arch/ia64/mm/fault.c | 7 ++++++- arch/ia64/mm/hugetlbpage.c | 18 ++++++++++++------ arch/ia64/mm/init.c | 28 ++++++++++++++++++++++++---- 5 files changed, 52 insertions(+), 22 deletions(-) diff --git a/arch/ia64/include/asm/pgalloc.h b/arch/ia64/include/asm/pgalloc.h index f4c491044882..2a3050345099 100644 --- a/arch/ia64/include/asm/pgalloc.h +++ b/arch/ia64/include/asm/pgalloc.h @@ -36,9 +36,9 @@ static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) #if CONFIG_PGTABLE_LEVELS == 4 static inline void -pgd_populate(struct mm_struct *mm, pgd_t * pgd_entry, pud_t * pud) +p4d_populate(struct mm_struct *mm, p4d_t * p4d_entry, pud_t * pud) { - pgd_val(*pgd_entry) = __pa(pud); + p4d_val(*p4d_entry) = __pa(pud); } static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr) diff --git a/arch/ia64/include/asm/pgtable.h b/arch/ia64/include/asm/pgtable.h index d602e7c622db..c87f789bc914 100644 --- a/arch/ia64/include/asm/pgtable.h +++ b/arch/ia64/include/asm/pgtable.h @@ -283,12 +283,12 @@ extern unsigned long VMALLOC_END; #define pud_page(pud) virt_to_page((pud_val(pud) + PAGE_OFFSET)) #if CONFIG_PGTABLE_LEVELS == 4 -#define pgd_none(pgd) (!pgd_val(pgd)) -#define pgd_bad(pgd) (!ia64_phys_addr_valid(pgd_val(pgd))) -#define pgd_present(pgd) (pgd_val(pgd) != 0UL) -#define pgd_clear(pgdp) (pgd_val(*(pgdp)) = 0UL) -#define pgd_page_vaddr(pgd) ((unsigned long) __va(pgd_val(pgd) & _PFN_MASK)) -#define pgd_page(pgd) virt_to_page((pgd_val(pgd) + PAGE_OFFSET)) +#define p4d_none(p4d) (!p4d_val(p4d)) +#define p4d_bad(p4d) (!ia64_phys_addr_valid(p4d_val(p4d))) +#define p4d_present(p4d) (p4d_val(p4d) != 0UL) +#define p4d_clear(p4dp) (p4d_val(*(p4dp)) = 0UL) +#define p4d_page_vaddr(p4d) ((unsigned long) __va(p4d_val(p4d) & _PFN_MASK)) +#define p4d_page(p4d) virt_to_page((p4d_val(p4d) + PAGE_OFFSET)) #endif /* @@ -388,7 +388,7 @@ pgd_offset (const struct mm_struct *mm, unsigned long address) #if CONFIG_PGTABLE_LEVELS == 4 /* Find an entry in the second-level page table.. */ #define pud_offset(dir,addr) \ - ((pud_t *) pgd_page_vaddr(*(dir)) + (((addr) >> PUD_SHIFT) & (PTRS_PER_PUD - 1))) + ((pud_t *) p4d_page_vaddr(*(dir)) + (((addr) >> PUD_SHIFT) & (PTRS_PER_PUD - 1))) #endif /* Find an entry in the third-level page table.. */ @@ -582,10 +582,9 @@ extern struct page *zero_page_memmap_ptr; #if CONFIG_PGTABLE_LEVELS == 3 -#define __ARCH_USE_5LEVEL_HACK #include #endif -#include +#include #include #endif /* _ASM_IA64_PGTABLE_H */ diff --git a/arch/ia64/mm/fault.c b/arch/ia64/mm/fault.c index c2f299fe9e04..ec994135cb74 100644 --- a/arch/ia64/mm/fault.c +++ b/arch/ia64/mm/fault.c @@ -29,6 +29,7 @@ static int mapped_kernel_page_is_present (unsigned long address) { pgd_t *pgd; + p4d_t *p4d; pud_t *pud; pmd_t *pmd; pte_t *ptep, pte; @@ -37,7 +38,11 @@ mapped_kernel_page_is_present (unsigned long address) if (pgd_none(*pgd) || pgd_bad(*pgd)) return 0; - pud = pud_offset(pgd, address); + p4d = p4d_offset(pgd, address); + if (p4d_none(*p4d) || p4d_bad(*p4d)) + return 0; + + pud = pud_offset(p4d, address); if (pud_none(*pud) || pud_bad(*pud)) return 0; diff --git a/arch/ia64/mm/hugetlbpage.c b/arch/ia64/mm/hugetlbpage.c index d16e419fd712..32352a73df0c 100644 --- a/arch/ia64/mm/hugetlbpage.c +++ b/arch/ia64/mm/hugetlbpage.c @@ -30,12 +30,14 @@ huge_pte_alloc(struct mm_struct *mm, unsigned long addr, unsigned long sz) { unsigned long taddr = htlbpage_to_page(addr); pgd_t *pgd; + p4d_t *p4d; pud_t *pud; pmd_t *pmd; pte_t *pte = NULL; pgd = pgd_offset(mm, taddr); - pud = pud_alloc(mm, pgd, taddr); + p4d = p4d_offset(pgd, taddr); + pud = pud_alloc(mm, p4d, taddr); if (pud) { pmd = pmd_alloc(mm, pud, taddr); if (pmd) @@ -49,17 +51,21 @@ huge_pte_offset (struct mm_struct *mm, unsigned long addr, unsigned long sz) { unsigned long taddr = htlbpage_to_page(addr); pgd_t *pgd; + p4d_t *p4d; pud_t *pud; pmd_t *pmd; pte_t *pte = NULL; pgd = pgd_offset(mm, taddr); if (pgd_present(*pgd)) { - pud = pud_offset(pgd, taddr); - if (pud_present(*pud)) { - pmd = pmd_offset(pud, taddr); - if (pmd_present(*pmd)) - pte = pte_offset_map(pmd, taddr); + p4d = p4d_offset(pgd, addr); + if (p4d_present(*p4d)) { + pud = pud_offset(p4d, taddr); + if (pud_present(*pud)) { + pmd = pmd_offset(pud, taddr); + if (pmd_present(*pmd)) + pte = pte_offset_map(pmd, taddr); + } } } diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c index b01d68a2d5d9..4808f58220ac 100644 --- a/arch/ia64/mm/init.c +++ b/arch/ia64/mm/init.c @@ -208,6 +208,7 @@ static struct page * __init put_kernel_page (struct page *page, unsigned long address, pgprot_t pgprot) { pgd_t *pgd; + p4d_t *p4d; pud_t *pud; pmd_t *pmd; pte_t *pte; @@ -215,7 +216,10 @@ put_kernel_page (struct page *page, unsigned long address, pgprot_t pgprot) pgd = pgd_offset_k(address); /* note: this is NOT pgd_offset()! */ { - pud = pud_alloc(&init_mm, pgd, address); + p4d = p4d_alloc(&init_mm, pgd, address); + if (!p4d) + goto out; + pud = pud_alloc(&init_mm, p4d, address); if (!pud) goto out; pmd = pmd_alloc(&init_mm, pud, address); @@ -382,6 +386,7 @@ int vmemmap_find_next_valid_pfn(int node, int i) do { pgd_t *pgd; + p4d_t *p4d; pud_t *pud; pmd_t *pmd; pte_t *pte; @@ -392,7 +397,13 @@ int vmemmap_find_next_valid_pfn(int node, int i) continue; } - pud = pud_offset(pgd, end_address); + p4d = p4d_offset(pgd, end_address); + if (p4d_none(*p4d)) { + end_address += P4D_SIZE; + continue; + } + + pud = pud_offset(p4d, end_address); if (pud_none(*pud)) { end_address += PUD_SIZE; continue; @@ -430,6 +441,7 @@ int __init create_mem_map_page_table(u64 start, u64 end, void *arg) struct page *map_start, *map_end; int node; pgd_t *pgd; + p4d_t *p4d; pud_t *pud; pmd_t *pmd; pte_t *pte; @@ -444,12 +456,20 @@ int __init create_mem_map_page_table(u64 start, u64 end, void *arg) for (address = start_page; address < end_page; address += PAGE_SIZE) { pgd = pgd_offset_k(address); if (pgd_none(*pgd)) { + p4d = memblock_alloc_node(PAGE_SIZE, PAGE_SIZE, node); + if (!p4d) + goto err_alloc; + pgd_populate(&init_mm, pgd, p4d); + } + p4d = p4d_offset(pgd, address); + + if (p4d_none(*p4d)) { pud = memblock_alloc_node(PAGE_SIZE, PAGE_SIZE, node); if (!pud) goto err_alloc; - pgd_populate(&init_mm, pgd, pud); + p4d_populate(&init_mm, p4d, pud); } - pud = pud_offset(pgd, address); + pud = pud_offset(p4d, address); if (pud_none(*pud)) { pmd = memblock_alloc_node(PAGE_SIZE, PAGE_SIZE, node);