From b22da3d8526a935aa31e086e63f60ff3246cb61c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 09 Dec 2023 07:24:11 +0000
Subject: [PATCH] add stmac read mac form eeprom
---
kernel/arch/arm64/mm/hugetlbpage.c | 134 +++++++++++++++++++++++++++++++-------------
1 files changed, 94 insertions(+), 40 deletions(-)
diff --git a/kernel/arch/arm64/mm/hugetlbpage.c b/kernel/arch/arm64/mm/hugetlbpage.c
index 1d76567..54009d4 100644
--- a/kernel/arch/arm64/mm/hugetlbpage.c
+++ b/kernel/arch/arm64/mm/hugetlbpage.c
@@ -1,18 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* arch/arm64/mm/hugetlbpage.c
*
* Copyright (C) 2013 Linaro Ltd.
*
* Based on arch/x86/mm/hugetlbpage.c.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
*/
#include <linux/init.h>
@@ -25,7 +17,64 @@
#include <asm/mman.h>
#include <asm/tlb.h>
#include <asm/tlbflush.h>
-#include <asm/pgalloc.h>
+
+/*
+ * HugeTLB Support Matrix
+ *
+ * ---------------------------------------------------
+ * | Page Size | CONT PTE | PMD | CONT PMD | PUD |
+ * ---------------------------------------------------
+ * | 4K | 64K | 2M | 32M | 1G |
+ * | 16K | 2M | 32M | 1G | |
+ * | 64K | 2M | 512M | 16G | |
+ * ---------------------------------------------------
+ */
+
+/*
+ * Reserve CMA areas for the largest supported gigantic
+ * huge page when requested. Any other smaller gigantic
+ * huge pages could still be served from those areas.
+ */
+#ifdef CONFIG_CMA
+void __init arm64_hugetlb_cma_reserve(void)
+{
+ int order;
+
+#ifdef CONFIG_ARM64_4K_PAGES
+ order = PUD_SHIFT - PAGE_SHIFT;
+#else
+ order = CONT_PMD_SHIFT - PAGE_SHIFT;
+#endif
+ /*
+ * HugeTLB CMA reservation is required for gigantic
+ * huge pages which could not be allocated via the
+ * page allocator. Just warn if there is any change
+ * breaking this assumption.
+ */
+ WARN_ON(order <= MAX_ORDER);
+ hugetlb_cma_reserve(order);
+}
+#endif /* CONFIG_CMA */
+
+#ifdef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION
+bool arch_hugetlb_migration_supported(struct hstate *h)
+{
+ size_t pagesize = huge_page_size(h);
+
+ switch (pagesize) {
+#ifdef CONFIG_ARM64_4K_PAGES
+ case PUD_SIZE:
+#endif
+ case PMD_SIZE:
+ case CONT_PMD_SIZE:
+ case CONT_PTE_SIZE:
+ return true;
+ }
+ pr_warn("%s: unrecognized huge page size 0x%lx\n",
+ __func__, pagesize);
+ return false;
+}
+#endif
int pmd_huge(pmd_t pmd)
{
@@ -55,11 +104,13 @@
pte_t *ptep, size_t *pgsize)
{
pgd_t *pgdp = pgd_offset(mm, addr);
+ p4d_t *p4dp;
pud_t *pudp;
pmd_t *pmdp;
*pgsize = PAGE_SIZE;
- pudp = pud_offset(pgdp, addr);
+ p4dp = p4d_offset(pgdp, addr);
+ pudp = pud_offset(p4dp, addr);
pmdp = pmd_offset(pudp, addr);
if ((pte_t *)pmdp == ptep) {
*pgsize = PMD_SIZE;
@@ -201,22 +252,24 @@
set_pte(ptep, pte);
}
-pte_t *huge_pte_alloc(struct mm_struct *mm,
+pte_t *huge_pte_alloc(struct mm_struct *mm, struct vm_area_struct *vma,
unsigned long addr, unsigned long sz)
{
pgd_t *pgdp;
+ p4d_t *p4dp;
pud_t *pudp;
pmd_t *pmdp;
pte_t *ptep = NULL;
pgdp = pgd_offset(mm, addr);
- pudp = pud_alloc(mm, pgdp, addr);
+ p4dp = p4d_offset(pgdp, addr);
+ pudp = pud_alloc(mm, p4dp, addr);
if (!pudp)
return NULL;
if (sz == PUD_SIZE) {
ptep = (pte_t *)pudp;
- } else if (sz == (PAGE_SIZE * CONT_PTES)) {
+ } else if (sz == (CONT_PTE_SIZE)) {
pmdp = pmd_alloc(mm, pudp, addr);
if (!pmdp)
return NULL;
@@ -231,12 +284,11 @@
*/
ptep = pte_alloc_map(mm, pmdp, addr);
} else if (sz == PMD_SIZE) {
- if (IS_ENABLED(CONFIG_ARCH_WANT_HUGE_PMD_SHARE) &&
- pud_none(READ_ONCE(*pudp)))
- ptep = huge_pmd_share(mm, addr, pudp);
+ if (want_pmd_share(vma, addr) && pud_none(READ_ONCE(*pudp)))
+ ptep = huge_pmd_share(mm, vma, addr, pudp);
else
ptep = (pte_t *)pmd_alloc(mm, pudp, addr);
- } else if (sz == (PMD_SIZE * CONT_PMDS)) {
+ } else if (sz == (CONT_PMD_SIZE)) {
pmdp = pmd_alloc(mm, pudp, addr);
WARN_ON(addr & (sz - 1));
return (pte_t *)pmdp;
@@ -249,6 +301,7 @@
unsigned long addr, unsigned long sz)
{
pgd_t *pgdp;
+ p4d_t *p4dp;
pud_t *pudp, pud;
pmd_t *pmdp, pmd;
@@ -256,7 +309,11 @@
if (!pgd_present(READ_ONCE(*pgdp)))
return NULL;
- pudp = pud_offset(pgdp, addr);
+ p4dp = p4d_offset(pgdp, addr);
+ if (!p4d_present(READ_ONCE(*p4dp)))
+ return NULL;
+
+ pudp = pud_offset(p4dp, addr);
pud = READ_ONCE(*pudp);
if (sz != PUD_SIZE && pud_none(pud))
return NULL;
@@ -431,33 +488,30 @@
clear_flush(vma->vm_mm, addr, ptep, pgsize, ncontig);
}
-static __init int setup_hugepagesz(char *opt)
+static int __init hugetlbpage_init(void)
{
- unsigned long ps = memparse(opt, &opt);
+#ifdef CONFIG_ARM64_4K_PAGES
+ hugetlb_add_hstate(PUD_SHIFT - PAGE_SHIFT);
+#endif
+ hugetlb_add_hstate(CONT_PMD_SHIFT - PAGE_SHIFT);
+ hugetlb_add_hstate(PMD_SHIFT - PAGE_SHIFT);
+ hugetlb_add_hstate(CONT_PTE_SHIFT - PAGE_SHIFT);
- switch (ps) {
+ return 0;
+}
+arch_initcall(hugetlbpage_init);
+
+bool __init arch_hugetlb_valid_size(unsigned long size)
+{
+ switch (size) {
#ifdef CONFIG_ARM64_4K_PAGES
case PUD_SIZE:
#endif
- case PMD_SIZE * CONT_PMDS:
+ case CONT_PMD_SIZE:
case PMD_SIZE:
- case PAGE_SIZE * CONT_PTES:
- hugetlb_add_hstate(ilog2(ps) - PAGE_SHIFT);
- return 1;
+ case CONT_PTE_SIZE:
+ return true;
}
- hugetlb_bad_size();
- pr_err("hugepagesz: Unsupported page size %lu K\n", ps >> 10);
- return 0;
+ return false;
}
-__setup("hugepagesz=", setup_hugepagesz);
-
-#ifdef CONFIG_ARM64_64K_PAGES
-static __init int add_default_hugepagesz(void)
-{
- if (size_to_hstate(CONT_PTES * PAGE_SIZE) == NULL)
- hugetlb_add_hstate(CONT_PTE_SHIFT);
- return 0;
-}
-arch_initcall(add_default_hugepagesz);
-#endif
--
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