From: "Vishal Moola (Oracle)" <vishal.moola@gmail.com>
To: Andrew Morton <akpm@linux-foundation.org>,
Matthew Wilcox <willy@infradead.org>
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)" <vishal.moola@gmail.com>
Subject: [PATCH v2 05/34] mm: add utility functions for ptdesc
Date: Mon, 1 May 2023 12:28:00 -0700 [thread overview]
Message-ID: <20230501192829.17086-6-vishal.moola@gmail.com> (raw)
In-Reply-To: <20230501192829.17086-1-vishal.moola@gmail.com>
Introduce utility functions setting the foundation for ptdescs. These
will also assist in the splitting out of ptdesc from struct page.
ptdesc_alloc() is defined to allocate new ptdesc pages as compound
pages. This is to standardize ptdescs by allowing for one allocation
and one free function, in contrast to 2 allocation and 2 free functions.
Signed-off-by: Vishal Moola (Oracle) <vishal.moola@gmail.com>
---
include/asm-generic/tlb.h | 11 ++++++++++
include/linux/mm.h | 44 +++++++++++++++++++++++++++++++++++++++
include/linux/pgtable.h | 12 +++++++++++
3 files changed, 67 insertions(+)
diff --git a/include/asm-generic/tlb.h b/include/asm-generic/tlb.h
index b46617207c93..6bade9e0e799 100644
--- a/include/asm-generic/tlb.h
+++ b/include/asm-generic/tlb.h
@@ -481,6 +481,17 @@ static inline void tlb_remove_page(struct mmu_gather *tlb, struct page *page)
return tlb_remove_page_size(tlb, page, PAGE_SIZE);
}
+static inline void tlb_remove_ptdesc(struct mmu_gather *tlb, void *pt)
+{
+ tlb_remove_table(tlb, pt);
+}
+
+/* Like tlb_remove_ptdesc, but for page-like page directories. */
+static inline void tlb_remove_page_ptdesc(struct mmu_gather *tlb, struct ptdesc *pt)
+{
+ tlb_remove_page(tlb, ptdesc_page(pt));
+}
+
static inline void tlb_change_page_size(struct mmu_gather *tlb,
unsigned int page_size)
{
diff --git a/include/linux/mm.h b/include/linux/mm.h
index b18848ae7e22..258f3b730359 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2744,6 +2744,45 @@ static inline pmd_t *pmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long a
}
#endif /* CONFIG_MMU */
+static inline struct ptdesc *virt_to_ptdesc(const void *x)
+{
+ return page_ptdesc(virt_to_head_page(x));
+}
+
+static inline void *ptdesc_to_virt(const struct ptdesc *pt)
+{
+ return page_to_virt(ptdesc_page(pt));
+}
+
+static inline void *ptdesc_address(const struct ptdesc *pt)
+{
+ return folio_address(ptdesc_folio(pt));
+}
+
+static inline bool ptdesc_is_reserved(struct ptdesc *pt)
+{
+ return folio_test_reserved(ptdesc_folio(pt));
+}
+
+static inline struct ptdesc *ptdesc_alloc(gfp_t gfp, unsigned int order)
+{
+ struct page *page = alloc_pages(gfp | __GFP_COMP, order);
+
+ return page_ptdesc(page);
+}
+
+static inline void ptdesc_free(struct ptdesc *pt)
+{
+ struct page *page = ptdesc_page(pt);
+
+ __free_pages(page, compound_order(page));
+}
+
+static inline void ptdesc_clear(void *x)
+{
+ clear_page(x);
+}
+
#if USE_SPLIT_PTE_PTLOCKS
#if ALLOC_SPLIT_PTLOCKS
void __init ptlock_cache_init(void);
@@ -2970,6 +3009,11 @@ static inline void mark_page_reserved(struct page *page)
adjust_managed_page_count(page, -1);
}
+static inline void free_reserved_ptdesc(struct ptdesc *pt)
+{
+ free_reserved_page(ptdesc_page(pt));
+}
+
/*
* Default method to free all the __init memory into the buddy system.
* The freed pages will be poisoned with pattern "poison" if it's within
diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h
index 5e0f51308724..b067ac10f3dd 100644
--- a/include/linux/pgtable.h
+++ b/include/linux/pgtable.h
@@ -1041,6 +1041,18 @@ TABLE_MATCH(ptl, ptl);
#undef TABLE_MATCH
static_assert(sizeof(struct ptdesc) <= sizeof(struct page));
+#define ptdesc_page(pt) (_Generic((pt), \
+ const struct ptdesc *: (const struct page *)(pt), \
+ struct ptdesc *: (struct page *)(pt)))
+
+#define ptdesc_folio(pt) (_Generic((pt), \
+ const struct ptdesc *: (const struct folio *)(pt), \
+ struct ptdesc *: (struct folio *)(pt)))
+
+#define page_ptdesc(p) (_Generic((p), \
+ const struct page *: (const struct ptdesc *)(p), \
+ struct page *: (struct ptdesc *)(p)))
+
/*
* No-op macros that just return the current protection value. Defined here
* because these macros can be used even if CONFIG_MMU is not defined.
--
2.39.2
next prev parent reply other threads:[~2023-05-01 19:29 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-01 19:27 [PATCH v2 00/34] Split ptdesc from struct page Vishal Moola (Oracle)
2023-05-01 19:27 ` [PATCH v2 01/34] mm: Add PAGE_TYPE_OP folio functions Vishal Moola (Oracle)
2023-05-25 8:55 ` Mike Rapoport
2023-05-25 17:00 ` Vishal Moola
2023-05-25 20:20 ` Mike Rapoport
2023-05-25 20:38 ` Vishal Moola
2023-05-25 20:57 ` Matthew Wilcox
2023-05-01 19:27 ` [PATCH v2 02/34] s390: Use _pt_s390_gaddr for gmap address tracking Vishal Moola (Oracle)
2023-05-25 8:58 ` Mike Rapoport
2023-05-25 17:12 ` Vishal Moola
2023-05-01 19:27 ` [PATCH v2 03/34] s390: Use pt_frag_refcount for pagetables Vishal Moola (Oracle)
2023-05-01 19:27 ` [PATCH v2 04/34] pgtable: Create struct ptdesc Vishal Moola (Oracle)
2023-05-01 19:28 ` Vishal Moola (Oracle) [this message]
2023-05-25 9:09 ` [PATCH v2 05/34] mm: add utility functions for ptdesc Mike Rapoport
2023-05-25 18:04 ` Vishal Moola
2023-05-25 20:25 ` Mike Rapoport
2023-05-25 20:53 ` Vishal Moola
2023-05-27 10:41 ` Mike Rapoport
2023-05-27 15:09 ` Matthew Wilcox
2023-05-28 5:47 ` Mike Rapoport
2023-05-01 19:28 ` [PATCH v2 06/34] mm: Convert pmd_pgtable_page() to pmd_ptdesc() Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 07/34] mm: Convert ptlock_alloc() to use ptdescs Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 08/34] mm: Convert ptlock_ptr() " Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 09/34] mm: Convert pmd_ptlock_init() " Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 10/34] mm: Convert ptlock_init() " Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 11/34] mm: Convert pmd_ptlock_free() " Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 12/34] mm: Convert ptlock_free() " Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 13/34] mm: Create ptdesc equivalents for pgtable_{pte,pmd}_page_{ctor,dtor} Vishal Moola (Oracle)
2023-05-25 9:19 ` Mike Rapoport
2023-05-25 18:17 ` Vishal Moola
2023-05-01 19:28 ` [PATCH v2 14/34] powerpc: Convert various functions to use ptdescs Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 15/34] x86: " Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 16/34] s390: Convert various gmap " Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 17/34] s390: Convert various pgalloc " Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 18/34] mm: Remove page table members from struct page Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 19/34] pgalloc: Convert various functions to use ptdescs Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 20/34] arm: " Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 21/34] arm64: " Vishal Moola (Oracle)
2023-05-02 1:48 ` kernel test robot
2023-05-02 2:21 ` kernel test robot
2023-05-01 19:28 ` [PATCH v2 22/34] csky: Convert __pte_free_tlb() " Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 23/34] hexagon: " Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 24/34] loongarch: Convert various functions " Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 25/34] m68k: " Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 26/34] mips: " Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 27/34] nios2: Convert __pte_free_tlb() " Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 28/34] openrisc: " Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 29/34] riscv: Convert alloc_{pmd, pte}_late() " Vishal Moola (Oracle)
2023-05-01 20:59 ` Palmer Dabbelt
2023-05-01 19:28 ` [PATCH v2 30/34] sh: Convert pte_free_tlb() " Vishal Moola (Oracle)
2023-05-06 11:35 ` John Paul Adrian Glaubitz
2023-05-15 19:11 ` Vishal Moola
2023-05-01 19:28 ` [PATCH v2 31/34] sparc64: Convert various functions " Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 32/34] sparc: Convert pgtable_pte_page_{ctor, dtor}() to ptdesc equivalents Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 33/34] um: Convert {pmd, pte}_free_tlb() to use ptdescs Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 34/34] mm: Remove pgtable_{pmd, pte}_page_{ctor, dtor}() wrappers Vishal Moola (Oracle)
2023-05-18 12:12 ` [PATCH v2 00/34] Split ptdesc from struct page Jason Gunthorpe
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