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Message-ID: <1448458872-39897-1-git-send-email-zhongjiang@huawei.com>
Date: Wed, 25 Nov 2015 21:41:12 +0800
From: zhongjiang <zhongjiang@...wei.com>
To: <catalin.marinas@....com>, <will.deacon@....com>,
<lauraa@...eaurora.org>, <mark.rutland@....com>
CC: <zhongjiang@...wei.com>, <qiuxishi@...wei.com>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>, <guohanjun@...wei.com>
Subject: [PATCH] arm64: calculate the various pages number to show
This patch add the interface to show the number of 4KB or 64KB page,
aims to statistics the number of different types of pages.
Signed-off-by: zhongjiang <zhongjiang@...wei.com>
---
arch/arm64/include/asm/pgtable-types.h | 24 ++++++++++++++++++++++++
arch/arm64/mm/mmu.c | 28 ++++++++++++++++++++++++++++
arch/arm64/mm/pageattr.c | 31 +++++++++++++++++++++++++++++++
3 files changed, 83 insertions(+), 0 deletions(-)
diff --git a/arch/arm64/include/asm/pgtable-types.h b/arch/arm64/include/asm/pgtable-types.h
index 2b1bd7e..aa52546 100644
--- a/arch/arm64/include/asm/pgtable-types.h
+++ b/arch/arm64/include/asm/pgtable-types.h
@@ -86,6 +86,30 @@ typedef pteval_t pgprot_t;
#endif /* STRICT_MM_TYPECHECKS */
+struct seq_file;
+extern void arch_report_meminfo(struct seq_file *m);
+
+enum pg_level {
+ PG_LEVEL_NONE,
+#ifdef CONFIG_ARM64_4K_PAGES
+ PG_LEVEL_4K,
+ PG_LEVEL_2M,
+ PG_LEVEL_1G,
+#else
+ PG_LEVEL_64K,
+ PG_LEVEL_512M,
+#endif
+ PG_LEVEL_NUM
+};
+
+#ifdef CONFIG_PROC_FS
+extern void update_page_count(int level, unsigned long pages);
+extern void split_page_count(int level);
+#else
+static inline void update_page_count(int level, unsigned long pages) {}
+static inline void split_page_count(int level) {}
+#endif
+
#if CONFIG_PGTABLE_LEVELS == 2
#include <asm-generic/pgtable-nopmd.h>
#elif CONFIG_PGTABLE_LEVELS == 3
diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index 0a7bee7..f9772d0 100644
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -30,6 +30,7 @@
#include <linux/stop_machine.h>
#include <linux/bootmem.h>
+#include <asm/pgtable-types.h>
#include <asm/cputype.h>
#include <asm/fixmap.h>
#include <asm/sections.h>
@@ -85,6 +86,11 @@ void split_pmd(pmd_t *pmd, pte_t *pte)
set_pte(pte, pfn_pte(pfn, prot));
pfn++;
} while (pte++, i++, i < PTRS_PER_PTE);
+#ifdef CONFIG_ARM64_4K_PAGES
+ split_page_count(PG_LEVEL_2M);
+#else
+ split_page_count(PG_LEVEL_512M);
+#endif
}
static void alloc_init_pte(pmd_t *pmd, unsigned long addr,
@@ -93,6 +99,7 @@ static void alloc_init_pte(pmd_t *pmd, unsigned long addr,
void *(*alloc)(unsigned long size))
{
pte_t *pte;
+ unsigned long i = 0;
if (pmd_none(*pmd) || pmd_sect(*pmd)) {
pte = alloc(PTRS_PER_PTE * sizeof(pte_t));
@@ -107,7 +114,13 @@ static void alloc_init_pte(pmd_t *pmd, unsigned long addr,
do {
set_pte(pte, pfn_pte(pfn, prot));
pfn++;
+ i++;
} while (pte++, addr += PAGE_SIZE, addr != end);
+#ifdef CONFIG_ARM64_4K_PAGES
+ update_page_count(PG_LEVEL_4K, i);
+#else
+ update_page_count(PG_LEVEL_64K, i);
+#endif
}
void split_pud(pud_t *old_pud, pmd_t *pmd)
@@ -120,6 +133,9 @@ void split_pud(pud_t *old_pud, pmd_t *pmd)
set_pmd(pmd, __pmd(addr | prot));
addr += PMD_SIZE;
} while (pmd++, i++, i < PTRS_PER_PMD);
+#ifdef CONFIG_ARM64_4K_PAGES
+ split_page_count(PG_LEVEL_1G);
+#endif
}
static void alloc_init_pmd(struct mm_struct *mm, pud_t *pud,
@@ -129,6 +145,7 @@ static void alloc_init_pmd(struct mm_struct *mm, pud_t *pud,
{
pmd_t *pmd;
unsigned long next;
+ unsigned long i = 0;
/*
* Check for initial section mappings in the pgd/pud and remove them.
@@ -159,6 +176,7 @@ static void alloc_init_pmd(struct mm_struct *mm, pud_t *pud,
* Check for previous table entries created during
* boot (__create_page_tables) and flush them.
*/
+ i++;
if (!pmd_none(old_pmd)) {
flush_tlb_all();
if (pmd_table(old_pmd)) {
@@ -173,6 +191,11 @@ static void alloc_init_pmd(struct mm_struct *mm, pud_t *pud,
}
phys += next - addr;
} while (pmd++, addr = next, addr != end);
+#ifdef CONFIG_ARM64_4K_PAGES
+ update_page_count(PG_LEVEL_2M, i);
+#else
+ update_page_count(PG_LEVEL_512M, i);
+#endif
}
static inline bool use_1G_block(unsigned long addr, unsigned long next,
@@ -194,6 +217,7 @@ static void alloc_init_pud(struct mm_struct *mm, pgd_t *pgd,
{
pud_t *pud;
unsigned long next;
+ unsigned long i = 0;
if (pgd_none(*pgd)) {
pud = alloc(PTRS_PER_PUD * sizeof(pud_t));
@@ -220,6 +244,7 @@ static void alloc_init_pud(struct mm_struct *mm, pgd_t *pgd,
*
* Look up the old pmd table and free it.
*/
+ i++;
if (!pud_none(old_pud)) {
flush_tlb_all();
if (pud_table(old_pud)) {
@@ -233,6 +258,9 @@ static void alloc_init_pud(struct mm_struct *mm, pgd_t *pgd,
}
phys += next - addr;
} while (pud++, addr = next, addr != end);
+#ifdef CONFIG_ARM64_4K_PAGES
+ update_page_count(PG_LEVEL_1G, i);
+#endif
}
/*
diff --git a/arch/arm64/mm/pageattr.c b/arch/arm64/mm/pageattr.c
index 7a5ff11..c1888b9 100644
--- a/arch/arm64/mm/pageattr.c
+++ b/arch/arm64/mm/pageattr.c
@@ -15,12 +15,43 @@
#include <linux/module.h>
#include <linux/sched.h>
+#include <linux/seq_file.h>
#include <asm/pgalloc.h>
#include <asm/pgtable.h>
#include <asm/tlbflush.h>
#include "mm.h"
+static unsigned long direct_pages_count[PG_LEVEL_NUM];
+
+void update_page_count(int level, unsigned long pages)
+{
+ direct_pages_count[level] += pages;
+}
+
+void split_page_count(int level)
+{
+ direct_pages_count[level]--;
+ direct_pages_count[level-1] += PTRS_PER_PTE;
+}
+
+void arch_report_meminfo(struct seq_file *m)
+{
+#ifdef CONFIG_ARM64_4K_PAGES
+ seq_printf(m, "DirectMap4k: %8lu kB\n",
+ direct_pages_count[PG_LEVEL_4K] << 2);
+ seq_printf(m, "DirectMap2M: %8lu kB\n",
+ direct_pages_count[PG_LEVEL_2M] << 11);
+ seq_printf(m, "DirectMap1G: %8lu kB\n",
+ direct_pages_count[PG_LEVEL_1G] << 20);
+#else
+ seq_printf(m, "DirectMap64k: %8lu kB\n",
+ direct_pages_count[PG_LEVEL_64K] << 6);
+ seq_printf(m, "DirectMap512M: %8lu kB\n",
+ direct_pages_count[PG_LEVEL_512M] << 19);
+#endif
+}
+
static int update_pte_range(struct mm_struct *mm, pmd_t *pmd,
unsigned long addr, unsigned long end,
pgprot_t clear, pgprot_t set)
--
1.7.7
--
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