The patch titled
Subject: x86: mm: point to struct seq_file from struct pg_state
has been added to the -mm tree. Its filename is
x86-mm-point-to-struct-seq_file-from-struct-pg_state.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/x86-mm-point-to-struct-seq_file-from-struct-pg_state.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/x86-mm-point-to-struct-seq_file-from-struct-pg_state.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Steven Price <steven.price@xxxxxxx>
Subject: x86: mm: point to struct seq_file from struct pg_state
mm/dump_pagetables.c passes both struct seq_file and struct pg_state down
the chain of walk_*_level() functions to be passed to note_page().
Instead place the struct seq_file in struct pg_state and access it from
struct pg_state (which is private to this file) in note_page().
Link: http://lkml.kernel.org/r/20190731154603.41797-16-steven.price@xxxxxxx
Signed-off-by: Steven Price <steven.price@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/x86/mm/dump_pagetables.c | 69 ++++++++++++++++----------------
1 file changed, 35 insertions(+), 34 deletions(-)
--- a/arch/x86/mm/dump_pagetables.c~x86-mm-point-to-struct-seq_file-from-struct-pg_state
+++ a/arch/x86/mm/dump_pagetables.c
@@ -36,6 +36,7 @@ struct pg_state {
bool to_dmesg;
bool check_wx;
unsigned long wx_pages;
+ struct seq_file *seq;
};
struct addr_marker {
@@ -265,11 +266,12 @@ static void note_wx(struct pg_state *st)
* of PTE entries; the next one is different so we need to
* print what we collected so far.
*/
-static void note_page(struct seq_file *m, struct pg_state *st,
- pgprot_t new_prot, pgprotval_t new_eff, int level)
+static void note_page(struct pg_state *st, pgprot_t new_prot,
+ pgprotval_t new_eff, int level)
{
pgprotval_t prot, cur, eff;
static const char units[] = "BKMGTPE";
+ struct seq_file *m = st->seq;
/*
* If we have a "break" in the series, we need to flush the state that
@@ -354,8 +356,8 @@ static inline pgprotval_t effective_prot
((prot1 | prot2) & _PAGE_NX);
}
-static void walk_pte_level(struct seq_file *m, struct pg_state *st, pmd_t addr,
- pgprotval_t eff_in, unsigned long P)
+static void walk_pte_level(struct pg_state *st, pmd_t addr, pgprotval_t eff_in,
+ unsigned long P)
{
int i;
pte_t *pte;
@@ -366,7 +368,7 @@ static void walk_pte_level(struct seq_fi
pte = pte_offset_map(&addr, st->current_address);
prot = pte_flags(*pte);
eff = effective_prot(eff_in, prot);
- note_page(m, st, __pgprot(prot), eff, 5);
+ note_page(st, __pgprot(prot), eff, 5);
pte_unmap(pte);
}
}
@@ -379,22 +381,20 @@ static void walk_pte_level(struct seq_fi
* us dozens of seconds (minutes for 5-level config) while checking for
* W+X mapping or reading kernel_page_tables debugfs file.
*/
-static inline bool kasan_page_table(struct seq_file *m, struct pg_state *st,
- void *pt)
+static inline bool kasan_page_table(struct pg_state *st, void *pt)
{
if (__pa(pt) == __pa(kasan_early_shadow_pmd) ||
(pgtable_l5_enabled() &&
__pa(pt) == __pa(kasan_early_shadow_p4d)) ||
__pa(pt) == __pa(kasan_early_shadow_pud)) {
pgprotval_t prot = pte_flags(kasan_early_shadow_pte[0]);
- note_page(m, st, __pgprot(prot), 0, 5);
+ note_page(st, __pgprot(prot), 0, 5);
return true;
}
return false;
}
#else
-static inline bool kasan_page_table(struct seq_file *m, struct pg_state *st,
- void *pt)
+static inline bool kasan_page_table(struct pg_state *st, void *pt)
{
return false;
}
@@ -402,7 +402,7 @@ static inline bool kasan_page_table(stru
#if PTRS_PER_PMD > 1
-static void walk_pmd_level(struct seq_file *m, struct pg_state *st, pud_t addr,
+static void walk_pmd_level(struct pg_state *st, pud_t addr,
pgprotval_t eff_in, unsigned long P)
{
int i;
@@ -416,27 +416,27 @@ static void walk_pmd_level(struct seq_fi
prot = pmd_flags(*start);
eff = effective_prot(eff_in, prot);
if (pmd_large(*start) || !pmd_present(*start)) {
- note_page(m, st, __pgprot(prot), eff, 4);
- } else if (!kasan_page_table(m, st, pmd_start)) {
- walk_pte_level(m, st, *start, eff,
+ note_page(st, __pgprot(prot), eff, 4);
+ } else if (!kasan_page_table(st, pmd_start)) {
+ walk_pte_level(st, *start, eff,
P + i * PMD_LEVEL_MULT);
}
} else
- note_page(m, st, __pgprot(0), 0, 4);
+ note_page(st, __pgprot(0), 0, 4);
start++;
}
}
#else
-#define walk_pmd_level(m,s,a,e,p) walk_pte_level(m,s,__pmd(pud_val(a)),e,p)
+#define walk_pmd_level(s,a,e,p) walk_pte_level(s,__pmd(pud_val(a)),e,p)
#define pud_large(a) pmd_large(__pmd(pud_val(a)))
#define pud_none(a) pmd_none(__pmd(pud_val(a)))
#endif
#if PTRS_PER_PUD > 1
-static void walk_pud_level(struct seq_file *m, struct pg_state *st, p4d_t addr,
- pgprotval_t eff_in, unsigned long P)
+static void walk_pud_level(struct pg_state *st, p4d_t addr, pgprotval_t eff_in,
+ unsigned long P)
{
int i;
pud_t *start, *pud_start;
@@ -450,33 +450,33 @@ static void walk_pud_level(struct seq_fi
prot = pud_flags(*start);
eff = effective_prot(eff_in, prot);
if (pud_large(*start) || !pud_present(*start)) {
- note_page(m, st, __pgprot(prot), eff, 3);
- } else if (!kasan_page_table(m, st, pud_start)) {
- walk_pmd_level(m, st, *start, eff,
+ note_page(st, __pgprot(prot), eff, 3);
+ } else if (!kasan_page_table(st, pud_start)) {
+ walk_pmd_level(st, *start, eff,
P + i * PUD_LEVEL_MULT);
}
} else
- note_page(m, st, __pgprot(0), 0, 3);
+ note_page(st, __pgprot(0), 0, 3);
start++;
}
}
#else
-#define walk_pud_level(m,s,a,e,p) walk_pmd_level(m,s,__pud(p4d_val(a)),e,p)
+#define walk_pud_level(s,a,e,p) walk_pmd_level(s,__pud(p4d_val(a)),e,p)
#define p4d_large(a) pud_large(__pud(p4d_val(a)))
#define p4d_none(a) pud_none(__pud(p4d_val(a)))
#endif
-static void walk_p4d_level(struct seq_file *m, struct pg_state *st, pgd_t addr,
- pgprotval_t eff_in, unsigned long P)
+static void walk_p4d_level(struct pg_state *st, pgd_t addr, pgprotval_t eff_in,
+ unsigned long P)
{
int i;
p4d_t *start, *p4d_start;
pgprotval_t prot, eff;
if (PTRS_PER_P4D == 1)
- return walk_pud_level(m, st, __p4d(pgd_val(addr)), eff_in, P);
+ return walk_pud_level(st, __p4d(pgd_val(addr)), eff_in, P);
p4d_start = start = (p4d_t *)pgd_page_vaddr(addr);
@@ -486,13 +486,13 @@ static void walk_p4d_level(struct seq_fi
prot = p4d_flags(*start);
eff = effective_prot(eff_in, prot);
if (p4d_large(*start) || !p4d_present(*start)) {
- note_page(m, st, __pgprot(prot), eff, 2);
- } else if (!kasan_page_table(m, st, p4d_start)) {
- walk_pud_level(m, st, *start, eff,
+ note_page(st, __pgprot(prot), eff, 2);
+ } else if (!kasan_page_table(st, p4d_start)) {
+ walk_pud_level(st, *start, eff,
P + i * P4D_LEVEL_MULT);
}
} else
- note_page(m, st, __pgprot(0), 0, 2);
+ note_page(st, __pgprot(0), 0, 2);
start++;
}
@@ -529,6 +529,7 @@ static void ptdump_walk_pgd_level_core(s
}
st.check_wx = checkwx;
+ st.seq = m;
if (checkwx)
st.wx_pages = 0;
@@ -542,13 +543,13 @@ static void ptdump_walk_pgd_level_core(s
eff = prot;
#endif
if (pgd_large(*start) || !pgd_present(*start)) {
- note_page(m, &st, __pgprot(prot), eff, 1);
+ note_page(&st, __pgprot(prot), eff, 1);
} else {
- walk_p4d_level(m, &st, *start, eff,
+ walk_p4d_level(&st, *start, eff,
i * PGD_LEVEL_MULT);
}
} else
- note_page(m, &st, __pgprot(0), 0, 1);
+ note_page(&st, __pgprot(0), 0, 1);
cond_resched();
start++;
@@ -556,7 +557,7 @@ static void ptdump_walk_pgd_level_core(s
/* Flush out the last page */
st.current_address = normalize_addr(PTRS_PER_PGD*PGD_LEVEL_MULT);
- note_page(m, &st, __pgprot(0), 0, 0);
+ note_page(&st, __pgprot(0), 0, 0);
if (!checkwx)
return;
if (st.wx_pages)
_
Patches currently in -mm which might be from steven.price@xxxxxxx are
mm-add-generic-pd_leaf-macros.patch
arc-mm-add-pd_leaf-definitions.patch
arm-mm-add-pd_leaf-definitions.patch
arm64-mm-add-pd_leaf-definitions.patch
mips-mm-add-pd_leaf-definitions.patch
powerpc-mm-add-pd_leaf-definitions.patch
riscv-mm-add-pd_leaf-definitions.patch
s390-mm-add-pd_leaf-definitions.patch
sparc-mm-add-pd_leaf-definitions.patch
x86-mm-add-pd_leaf-definitions.patch
mm-pagewalk-add-p4d_entry-and-pgd_entry.patch
mm-pagewalk-allow-walking-without-vma.patch
mm-pagewalk-add-test_pd-callbacks.patch
mm-pagewalk-add-depth-parameter-to-pte_hole.patch
x86-mm-point-to-struct-seq_file-from-struct-pg_state.patch
x86-mmefi-convert-ptdump_walk_pgd_level-to-take-a-mm_struct.patch
x86-mm-convert-ptdump_walk_pgd_level_debugfs-to-take-an-mm_struct.patch
x86-mm-convert-ptdump_walk_pgd_level_core-to-take-an-mm_struct.patch
mm-add-generic-ptdump.patch
x86-mm-convert-dump_pagetables-to-use-walk_page_range.patch
arm64-mm-convert-mm-dumpc-to-use-walk_page_range.patch
arm64-mm-display-non-present-entries-in-ptdump.patch
