From: Andrew Morton <akpm@linux-foundation.org> To: akpm@linux-foundation.org, alex@ghiti.fr, aou@eecs.berkeley.edu, ard.biesheuvel@linaro.org, arnd@arndb.de, benh@kernel.crashing.org, borntraeger@de.ibm.com, bp@alien8.de, catalin.marinas@arm.com, dave.hansen@linux.intel.com, davem@davemloft.net, gor@linux.ibm.com, heiko.carstens@de.ibm.com, hpa@zytor.com, james.morse@arm.com, jglisse@redhat.com, jhogan@kernel.org, kan.liang@linux.intel.com, linux-mm@kvack.org, linux@armlinux.org.uk, luto@kernel.org, mark.rutland@arm.com, mingo@redhat.com, mm-commits@vger.kernel.org, mpe@ellerman.id.au, paul.burton@mips.com, paul.walmsley@sifive.com, paulus@samba.org, peterz@infradead.org, ralf@linux-mips.org, steven.price@arm.com, tglx@linutronix.de, torvalds@linux-foundation.org, vgupta@synopsys.com, will@kernel.org, zong.li@sifive.com Subject: [patch 33/67] x86: mm: add p?d_leaf() definitions Date: Mon, 03 Feb 2020 17:35:41 -0800 [thread overview] Message-ID: <20200204013541.eDVT3EfF1%akpm@linux-foundation.org> (raw) In-Reply-To: <20200203173311.6269a8be06a05e5a4aa08a93@linux-foundation.org> From: Steven Price <steven.price@arm.com> Subject: x86: mm: add p?d_leaf() definitions walk_page_range() is going to be allowed to walk page tables other than those of user space. For this it needs to know when it has reached a 'leaf' entry in the page tables. This information is provided by the p?d_leaf() functions/macros. For x86 we already have p?d_large() functions, so simply add macros to provide the generic p?d_leaf() names for the generic code. Link: http://lkml.kernel.org/r/20191218162402.45610-11-steven.price@arm.com Signed-off-by: Steven Price <steven.price@arm.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Alexandre Ghiti <alex@ghiti.fr> Cc: Andy Lutomirski <luto@kernel.org> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: David S. Miller <davem@davemloft.net> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Hogan <jhogan@kernel.org> Cc: James Morse <james.morse@arm.com> Cc: Jerome Glisse <jglisse@redhat.com> Cc: "Liang, Kan" <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Paul Burton <paul.burton@mips.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Will Deacon <will@kernel.org> Cc: Zong Li <zong.li@sifive.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> --- arch/x86/include/asm/pgtable.h | 5 +++++ 1 file changed, 5 insertions(+) --- a/arch/x86/include/asm/pgtable.h~x86-mm-add-pd_leaf-definitions +++ a/arch/x86/include/asm/pgtable.h @@ -239,6 +239,7 @@ static inline unsigned long pgd_pfn(pgd_ return (pgd_val(pgd) & PTE_PFN_MASK) >> PAGE_SHIFT; } +#define p4d_leaf p4d_large static inline int p4d_large(p4d_t p4d) { /* No 512 GiB pages yet */ @@ -247,6 +248,7 @@ static inline int p4d_large(p4d_t p4d) #define pte_page(pte) pfn_to_page(pte_pfn(pte)) +#define pmd_leaf pmd_large static inline int pmd_large(pmd_t pte) { return pmd_flags(pte) & _PAGE_PSE; @@ -874,6 +876,7 @@ static inline pmd_t *pmd_offset(pud_t *p return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address); } +#define pud_leaf pud_large static inline int pud_large(pud_t pud) { return (pud_val(pud) & (_PAGE_PSE | _PAGE_PRESENT)) == @@ -885,6 +888,7 @@ static inline int pud_bad(pud_t pud) return (pud_flags(pud) & ~(_KERNPG_TABLE | _PAGE_USER)) != 0; } #else +#define pud_leaf pud_large static inline int pud_large(pud_t pud) { return 0; @@ -1233,6 +1237,7 @@ static inline bool pgdp_maps_userspace(v return (((ptr & ~PAGE_MASK) / sizeof(pgd_t)) < PGD_KERNEL_START); } +#define pgd_leaf pgd_large static inline int pgd_large(pgd_t pgd) { return 0; } #ifdef CONFIG_PAGE_TABLE_ISOLATION _
next prev parent reply other threads:[~2020-02-04 1:35 UTC|newest] Thread overview: 95+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-02-04 1:33 incoming Andrew Morton 2020-02-04 1:33 ` [patch 01/67] ocfs2: fix oops when writing cloned file Andrew Morton 2020-02-04 1:33 ` [patch 02/67] mm/page_alloc.c: fix uninitialized memmaps on a partially populated last section Andrew Morton 2020-02-04 1:33 ` [patch 03/67] fs/proc/page.c: allow inspection of last section and fix end detection Andrew Morton 2020-02-04 1:33 ` [patch 04/67] mm/page_alloc.c: initialize memmap of unavailable memory directly Andrew Morton 2020-02-04 1:33 ` [patch 05/67] mm/page_alloc: fix and rework pfn handling in memmap_init_zone() Andrew Morton 2020-02-04 2:45 ` Linus Torvalds 2020-02-04 1:34 ` [patch 06/67] mm: factor out next_present_section_nr() Andrew Morton 2020-02-04 3:04 ` Linus Torvalds 2020-02-04 4:29 ` Andrew Morton 2020-02-04 8:22 ` David Hildenbrand 2020-02-04 1:34 ` [patch 07/67] mm/memmap_init: update variable name in memmap_init_zone Andrew Morton 2020-02-04 1:34 ` [patch 08/67] mm/memory_hotplug: poison memmap in remove_pfn_range_from_zone() Andrew Morton 2020-02-04 1:34 ` [patch 09/67] mm/memory_hotplug: we always have a zone in find_(smallest|biggest)_section_pfn Andrew Morton 2020-02-04 1:34 ` [patch 10/67] mm/memory_hotplug: don't check for "all holes" in shrink_zone_span() Andrew Morton 2020-02-04 1:34 ` [patch 11/67] mm/memory_hotplug: drop local variables " Andrew Morton 2020-02-04 1:34 ` [patch 12/67] mm/memory_hotplug: cleanup __remove_pages() Andrew Morton 2020-02-04 1:34 ` [patch 13/67] mm/memory_hotplug: drop valid_start/valid_end from test_pages_in_a_zone() Andrew Morton 2020-02-04 1:34 ` [patch 14/67] smp_mb__{before,after}_atomic(): update Documentation Andrew Morton 2020-02-04 1:34 ` [patch 15/67] ipc/mqueue.c: remove duplicated code Andrew Morton 2020-02-04 1:34 ` [patch 16/67] ipc/mqueue.c: update/document memory barriers Andrew Morton 2020-02-04 1:34 ` [patch 17/67] ipc/msg.c: update and document " Andrew Morton 2020-02-04 1:34 ` [patch 18/67] ipc/sem.c: document and update " Andrew Morton 2020-02-04 1:34 ` [patch 19/67] ipc/msg.c: consolidate all xxxctl_down() functions Andrew Morton 2020-02-04 1:34 ` [patch 20/67] drivers/block/null_blk_main.c: fix layout Andrew Morton 2020-02-04 1:34 ` [patch 21/67] drivers/block/null_blk_main.c: fix uninitialized var warnings Andrew Morton 2020-02-04 1:34 ` [patch 22/67] pinctrl: fix pxa2xx.c build warnings Andrew Morton 2020-02-04 1:34 ` [patch 23/67] mm: remove __krealloc Andrew Morton 2020-02-04 1:35 ` [patch 24/67] mm: add generic p?d_leaf() macros Andrew Morton 2020-02-04 1:35 ` [patch 25/67] arc: mm: add p?d_leaf() definitions Andrew Morton 2020-02-04 1:35 ` [patch 26/67] arm: " Andrew Morton 2020-02-04 1:35 ` [patch 27/67] arm64: " Andrew Morton 2020-02-04 1:35 ` [patch 28/67] mips: " Andrew Morton 2020-02-04 1:35 ` [patch 29/67] powerpc: " Andrew Morton 2020-02-04 1:35 ` [patch 30/67] riscv: " Andrew Morton 2020-02-04 1:35 ` [patch 31/67] s390: " Andrew Morton 2020-02-04 1:35 ` [patch 32/67] sparc: " Andrew Morton 2020-02-04 1:35 ` Andrew Morton [this message] 2020-02-04 1:35 ` [patch 34/67] mm: pagewalk: add p4d_entry() and pgd_entry() Andrew Morton 2020-02-04 1:35 ` [patch 35/67] mm: pagewalk: allow walking without vma Andrew Morton 2020-02-04 1:35 ` [patch 36/67] mm: pagewalk: don't lock PTEs for walk_page_range_novma() Andrew Morton 2020-02-04 1:35 ` [patch 37/67] mm: pagewalk: fix termination condition in walk_pte_range() Andrew Morton 2020-02-04 1:36 ` [patch 38/67] mm: pagewalk: add 'depth' parameter to pte_hole Andrew Morton 2020-02-04 1:36 ` [patch 39/67] x86: mm: point to struct seq_file from struct pg_state Andrew Morton 2020-02-04 1:36 ` [patch 40/67] x86: mm+efi: convert ptdump_walk_pgd_level() to take a mm_struct Andrew Morton 2020-02-04 1:36 ` [patch 41/67] x86: mm: convert ptdump_walk_pgd_level_debugfs() to take an mm_struct Andrew Morton 2020-02-04 1:36 ` [patch 42/67] mm: add generic ptdump Andrew Morton 2020-02-04 1:36 ` [patch 43/67] x86: mm: convert dump_pagetables to use walk_page_range Andrew Morton 2020-02-04 1:36 ` [patch 44/67] arm64: mm: convert mm/dump.c to use walk_page_range() Andrew Morton 2020-02-04 1:36 ` [patch 45/67] arm64: mm: display non-present entries in ptdump Andrew Morton 2020-02-04 1:36 ` [patch 46/67] mm: ptdump: reduce level numbers by 1 in note_page() Andrew Morton 2020-02-04 1:36 ` [patch 47/67] x86: mm: avoid allocating struct mm_struct on the stack Andrew Morton 2020-02-04 1:36 ` [patch 48/67] powerpc/mmu_gather: enable RCU_TABLE_FREE even for !SMP case Andrew Morton 2020-02-04 1:36 ` [patch 49/67] mm/mmu_gather: invalidate TLB correctly on batch allocation failure and flush Andrew Morton 2020-02-04 1:36 ` [patch 50/67] asm-generic/tlb: avoid potential double flush Andrew Morton 2020-02-04 1:36 ` [patch 51/67] asm-gemeric/tlb: remove stray function declarations Andrew Morton 2020-02-04 1:36 ` [patch 52/67] asm-generic/tlb: add missing CONFIG symbol Andrew Morton 2020-02-04 1:37 ` [patch 53/67] asm-generic/tlb: rename HAVE_RCU_TABLE_FREE Andrew Morton 2020-02-04 1:37 ` [patch 54/67] asm-generic/tlb: rename HAVE_MMU_GATHER_PAGE_SIZE Andrew Morton 2020-02-04 1:37 ` [patch 55/67] asm-generic/tlb: rename HAVE_MMU_GATHER_NO_GATHER Andrew Morton 2020-02-04 1:37 ` [patch 56/67] asm-generic/tlb: provide MMU_GATHER_TABLE_FREE Andrew Morton 2020-02-04 1:37 ` [patch 57/67] proc: decouple proc from VFS with "struct proc_ops" Andrew Morton 2020-02-04 1:37 ` [patch 58/67] proc: convert everything to " Andrew Morton 2020-02-04 1:37 ` [patch 59/67] lib/string: add strnchrnul() Andrew Morton 2020-02-04 1:37 ` [patch 60/67] bitops: more BITS_TO_* macros Andrew Morton 2020-02-04 1:37 ` [patch 61/67] lib: add test for bitmap_parse() Andrew Morton 2020-02-04 1:37 ` [patch 62/67] lib: make bitmap_parse_user a wrapper on bitmap_parse Andrew Morton 2020-02-04 1:37 ` [patch 63/67] lib: rework bitmap_parse() Andrew Morton 2020-02-04 1:37 ` [patch 64/67] lib: new testcases for bitmap_parse{_user} Andrew Morton 2020-02-04 1:37 ` [patch 65/67] include/linux/cpumask.h: don't calculate length of the input string Andrew Morton 2020-02-04 1:37 ` [patch 66/67] treewide: remove redundant IS_ERR() before error code check Andrew Morton 2020-02-04 1:37 ` [patch 67/67] ARM: dma-api: fix max_pfn off-by-one error in __dma_supported() Andrew Morton 2020-02-04 2:27 ` incoming Linus Torvalds 2020-02-04 2:46 ` incoming Andrew Morton 2020-02-04 3:11 ` incoming Linus Torvalds 2020-02-14 6:26 ` mmotm 2020-02-13-22-26 uploaded Andrew Morton 2020-02-14 16:29 ` mmotm 2020-02-13-22-26 uploaded (mm/hugetlb.c) Randy Dunlap 2020-02-14 17:18 ` Mike Kravetz 2020-02-14 20:51 ` Mina Almasry [not found] ` <20200214204544.231482-1-almasrymina@google.com> 2020-02-14 21:00 ` [PATCH] hugetlb: fix CONFIG_CGROUP_HUGETLB ifdefs Mina Almasry 2020-02-15 1:17 ` Randy Dunlap 2020-02-15 1:56 ` Randy Dunlap 2020-02-16 20:40 ` Mina Almasry 2020-02-16 21:03 ` Mina Almasry 2020-02-17 2:48 ` Randy Dunlap 2020-02-17 2:57 ` [PATCH] hugetlb: fix <linux/hugetlb_cgroup.h> structs Randy Dunlap 2020-02-17 3:53 ` [PATCH] hugetlb: fix CONFIG_CGROUP_HUGETLB ifdefs Stephen Rothwell 2020-02-14 16:49 ` mmotm 2020-02-13-22-26 uploaded (mm/migrate.c, hugetlb_cgroup.h) Randy Dunlap 2020-02-25 3:53 ` mmotm 2020-02-24-19-53 uploaded Andrew Morton 2020-02-25 6:16 ` mmotm 2020-02-24-19-53 uploaded (init/main.c: initrd*) Randy Dunlap 2020-02-25 6:18 ` Randy Dunlap 2020-02-25 6:21 ` Randy Dunlap 2020-02-25 16:41 ` mmotm 2020-02-24-19-53 uploaded (drivers/platform/x86/intel_pmc_core.c) Randy Dunlap 2020-02-25 17:01 ` mmotm 2020-02-24-19-53 uploaded (objtool warning) Randy Dunlap 2020-02-27 21:52 ` Josh Poimboeuf
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