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minidump: De-duplicate is_dumpable()

Browse Source 
The function is identical in each minidump implementation, so move it to
vm_phys.c. The only slight exception is powerpc where the function was
public, for use in moea64_scan_pmap().

Reviewed by:	kib, markj, imp (earlier version)
MFC after:	2 weeks
Sponsored by:	Juniper Networks, Inc.
Sponsored by:	Klara, Inc.
Differential Revision:	https://reviews.freebsd.org/D31884
This commit is contained in:
Mitchell Horne 2021-09-29 14:30:11 -03:00
parent f66b9b40f4
commit 31991a5a45
16 changed files with 48 additions and 130 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
sys/amd64/amd64/minidump_machdep.c
View File

@ -66,21 +66,6 @@ static int dump_retry_count = 5;
SYSCTL_INT(_machdep, OID_AUTO, dump_retry_count, CTLFLAG_RWTUN,
&dump_retry_count, 0, "Number of times dump has to retry before bailing out");
static int
is_dumpable(vm_paddr_t pa)
{
vm_page_t m;
int i;
if ((m = vm_phys_paddr_to_vm_page(pa)) != NULL)
return ((m->flags & PG_NODUMP) == 0);
for (i = 0; dump_avail[i] != 0 || dump_avail[i + 1] != 0; i += 2) {
if (pa >= dump_avail[i] && pa < dump_avail[i + 1])
return (1);
}
return (0);
}
#define PG2MB(pgs) (((pgs) + (1 << 8) - 1) >> 8)
static int
@ -256,7 +241,7 @@ minidumpsys(struct dumperinfo *di)
va += NBPDP;
pa = pdp[i] & PG_PS_FRAME;
for (n = 0; n < NPDEPG * NPTEPG; n++) {
if (is_dumpable(pa))
if (vm_phys_is_dumpable(pa))
dump_add_page(pa);
pa += PAGE_SIZE;
}
@ -274,7 +259,7 @@ minidumpsys(struct dumperinfo *di)
/* This is an entire 2M page. */
pa = pd[j] & PG_PS_FRAME;
for (k = 0; k < NPTEPG; k++) {
if (is_dumpable(pa))
if (vm_phys_is_dumpable(pa))
dump_add_page(pa);
pa += PAGE_SIZE;
}
@ -283,7 +268,7 @@ minidumpsys(struct dumperinfo *di)
pa = pd[j] & PG_FRAME;
/* set bit for this PTE page */
if (is_dumpable(pa))
if (vm_phys_is_dumpable(pa))
dump_add_page(pa);
/* and for each valid page in this 2MB block */
pt = (uint64_t *)PHYS_TO_DMAP(pd[j] & PG_FRAME);
@ -291,7 +276,7 @@ minidumpsys(struct dumperinfo *di)
if ((pt[k] & PG_V) == 0)
continue;
pa = pt[k] & PG_FRAME;
if (is_dumpable(pa))
if (vm_phys_is_dumpable(pa))
dump_add_page(pa);
}
}
@ -304,7 +289,7 @@ minidumpsys(struct dumperinfo *di)
dumpsize += round_page(BITSET_SIZE(vm_page_dump_pages));
VM_PAGE_DUMP_FOREACH(pa) {
/* Clear out undumpable pages now if needed */
if (is_dumpable(pa)) {
if (vm_phys_is_dumpable(pa)) {
dumpsize += PAGE_SIZE;
} else {
dump_drop_page(pa);

1
sys/amd64/amd64/uma_machdep.c
View File

@ -34,6 +34,7 @@ __FBSDID("$FreeBSD$");
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/vm_page.h>
#include <vm/vm_phys.h>
#include <vm/vm_dumpset.h>
#include <vm/uma.h>
#include <vm/uma_int.h>

19
sys/arm/arm/minidump_machdep.c
View File

@ -65,21 +65,6 @@ static size_t fragsz;
static void *dump_va;
static uint64_t counter, progress;
static int
is_dumpable(vm_paddr_t pa)
{
vm_page_t m;
int i;
if ((m = vm_phys_paddr_to_vm_page(pa)) != NULL)
return ((m->flags & PG_NODUMP) == 0);
for (i = 0; dump_avail[i] != 0 || dump_avail[i + 1] != 0; i += 2) {
if (pa >= dump_avail[i] && pa < dump_avail[i + 1])
return (1);
}
return (0);
}
#define PG2MB(pgs) (((pgs) + (1 << 8) - 1) >> 8)
static int
@ -202,7 +187,7 @@ minidumpsys(struct dumperinfo *di)
ptesize = 0;
for (va = KERNBASE; va < kernel_vm_end; va += PAGE_SIZE) {
pa = pmap_dump_kextract(va, NULL);
if (pa != 0 && is_dumpable(pa))
if (pa != 0 && vm_phys_is_dumpable(pa))
dump_add_page(pa);
ptesize += sizeof(pt2_entry_t);
}
@ -214,7 +199,7 @@ minidumpsys(struct dumperinfo *di)
dumpsize += round_page(BITSET_SIZE(vm_page_dump_pages));
VM_PAGE_DUMP_FOREACH(pa) {
/* Clear out undumpable pages now if needed */
if (is_dumpable(pa))
if (vm_phys_is_dumpable(pa))
dumpsize += PAGE_SIZE;
else
dump_drop_page(pa);

23
sys/arm64/arm64/minidump_machdep.c
View File

@ -66,21 +66,6 @@ static size_t counter, progress, dumpsize;
static uint64_t tmpbuffer[Ln_ENTRIES];
static int
is_dumpable(vm_paddr_t pa)
{
vm_page_t m;
int i;
if ((m = vm_phys_paddr_to_vm_page(pa)) != NULL)
return ((m->flags & PG_NODUMP) == 0);
for (i = 0; dump_avail[i] != 0 || dump_avail[i + 1] != 0; i += 2) {
if (pa >= dump_avail[i] && pa < dump_avail[i + 1])
return (1);
}
return (0);
}
static int
blk_flush(struct dumperinfo *di)
{
@ -226,14 +211,14 @@ minidumpsys(struct dumperinfo *di)
pa = *l1 & ~ATTR_MASK;
for (i = 0; i < Ln_ENTRIES * Ln_ENTRIES;
i++, pa += PAGE_SIZE)
if (is_dumpable(pa))
if (vm_phys_is_dumpable(pa))
dump_add_page(pa);
pmapsize += (Ln_ENTRIES - 1) * PAGE_SIZE;
va += L1_SIZE - L2_SIZE;
} else if ((*l2 & ATTR_DESCR_MASK) == L2_BLOCK) {
pa = *l2 & ~ATTR_MASK;
for (i = 0; i < Ln_ENTRIES; i++, pa += PAGE_SIZE) {
if (is_dumpable(pa))
if (vm_phys_is_dumpable(pa))
dump_add_page(pa);
}
} else if ((*l2 & ATTR_DESCR_MASK) == L2_TABLE) {
@ -241,7 +226,7 @@ minidumpsys(struct dumperinfo *di)
if ((l3[i] & ATTR_DESCR_MASK) != L3_PAGE)
continue;
pa = l3[i] & ~ATTR_MASK;
if (is_dumpable(pa))
if (vm_phys_is_dumpable(pa))
dump_add_page(pa);
}
}
@ -253,7 +238,7 @@ minidumpsys(struct dumperinfo *di)
dumpsize += round_page(sizeof(dump_avail));
dumpsize += round_page(BITSET_SIZE(vm_page_dump_pages));
VM_PAGE_DUMP_FOREACH(pa) {
if (is_dumpable(pa))
if (vm_phys_is_dumpable(pa))
dumpsize += PAGE_SIZE;
else
dump_drop_page(pa);

1
sys/arm64/arm64/uma_machdep.c
View File

@ -32,6 +32,7 @@ __FBSDID("$FreeBSD$");
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/vm_page.h>
#include <vm/vm_phys.h>
#include <vm/vm_dumpset.h>
#include <vm/uma.h>
#include <vm/uma_int.h>

21
sys/i386/i386/minidump_machdep_base.c
View File

@ -62,21 +62,6 @@ static size_t fragsz;
static void *dump_va;
static uint64_t counter, progress;
static int
is_dumpable(vm_paddr_t pa)
{
vm_page_t m;
int i;
if ((m = vm_phys_paddr_to_vm_page(pa)) != NULL)
return ((m->flags & PG_NODUMP) == 0);
for (i = 0; dump_avail[i] != 0 || dump_avail[i + 1] != 0; i += 2) {
if (pa >= dump_avail[i] && pa < dump_avail[i + 1])
return (1);
}
return (0);
}
#define PG2MB(pgs) (((pgs) + (1 << 8) - 1) >> 8)
static int
@ -203,7 +188,7 @@ minidumpsys(struct dumperinfo *di)
/* This is an entire 2M page. */
pa = pd[j] & PG_PS_FRAME;
for (k = 0; k < NPTEPG; k++) {
if (is_dumpable(pa))
if (vm_phys_is_dumpable(pa))
dump_add_page(pa);
pa += PAGE_SIZE;
}
@ -215,7 +200,7 @@ minidumpsys(struct dumperinfo *di)
for (k = 0; k < NPTEPG; k++) {
if ((pt[k] & PG_V) == PG_V) {
pa = pt[k] & PG_FRAME;
if (is_dumpable(pa))
if (vm_phys_is_dumpable(pa))
dump_add_page(pa);
}
}
@ -231,7 +216,7 @@ minidumpsys(struct dumperinfo *di)
dumpsize += round_page(BITSET_SIZE(vm_page_dump_pages));
VM_PAGE_DUMP_FOREACH(pa) {
/* Clear out undumpable pages now if needed */
if (is_dumpable(pa)) {
if (vm_phys_is_dumpable(pa)) {
dumpsize += PAGE_SIZE;
} else {
dump_drop_page(pa);

21
sys/mips/mips/minidump_machdep.c
View File

@ -64,21 +64,6 @@ static char tmpbuffer[PAGE_SIZE] __aligned(sizeof(uint64_t));
extern pd_entry_t *kernel_segmap;
static int
is_dumpable(vm_paddr_t pa)
{
vm_page_t m;
int i;
if ((m = vm_phys_paddr_to_vm_page(pa)) != NULL)
return ((m->flags & PG_NODUMP) == 0);
for (i = 0; dump_avail[i] != 0 || dump_avail[i + 1] != 0; i += 2) {
if (pa >= dump_avail[i] && pa < dump_avail[i + 1])
return (1);
}
return (0);
}
static struct {
int min_per;
int max_per;
@ -189,7 +174,7 @@ minidumpsys(struct dumperinfo *di)
for (i = 0; i < NPTEPG; i++) {
if (pte_test(&pte[i], PTE_V)) {
pa = TLBLO_PTE_TO_PA(pte[i]);
if (is_dumpable(pa))
if (vm_phys_is_dumpable(pa))
dump_add_page(pa);
}
}
@ -200,7 +185,7 @@ minidumpsys(struct dumperinfo *di)
* and pages allocated by pmap_steal reside
*/
for (pa = 0; pa < phys_avail[0]; pa += PAGE_SIZE) {
if (is_dumpable(pa))
if (vm_phys_is_dumpable(pa))
dump_add_page(pa);
}
@ -211,7 +196,7 @@ minidumpsys(struct dumperinfo *di)
dumpsize += round_page(BITSET_SIZE(vm_page_dump_pages));
VM_PAGE_DUMP_FOREACH(pa) {
/* Clear out undumpable pages now if needed */
if (is_dumpable(pa))
if (vm_phys_is_dumpable(pa))
dumpsize += PAGE_SIZE;
else
dump_drop_page(pa);

1
sys/mips/mips/uma_machdep.c
View File

@ -35,6 +35,7 @@ __FBSDID("$FreeBSD$");
#include <vm/vm_param.h>
#include <vm/vm_page.h>
#include <vm/vm_pageout.h>
#include <vm/vm_phys.h>
#include <vm/vm_dumpset.h>
#include <vm/uma.h>
#include <vm/uma_int.h>

4
sys/powerpc/aim/mmu_oea64.c
View File

@ -3362,11 +3362,11 @@ moea64_scan_pmap()
if (va & PVO_LARGE) {
pa_end = pa + lpsize;
for (; pa < pa_end; pa += PAGE_SIZE) {
if (is_dumpable(pa))
if (vm_phys_is_dumpable(pa))
dump_add_page(pa);
}
} else {
if (is_dumpable(pa))
if (vm_phys_is_dumpable(pa))
dump_add_page(pa);
}
}

1
sys/powerpc/include/md_var.h
View File

@ -44,7 +44,6 @@ extern int szsigcode64, szsigcode64_elfv2;
struct dumperinfo;
int minidumpsys(struct dumperinfo *);
int is_dumpable(vm_paddr_t);
#endif
extern long Maxmem;

17
sys/powerpc/powerpc/minidump_machdep.c
View File

@ -91,21 +91,6 @@ static size_t counter, dumpsize, progress;
/* Handle chunked writes. */
static size_t fragsz;
int
is_dumpable(vm_paddr_t pa)
{
vm_page_t m;
int i;
if ((m = vm_phys_paddr_to_vm_page(pa)) != NULL)
return ((m->flags & PG_NODUMP) == 0);
for (i = 0; dump_avail[i] != 0 || dump_avail[i + 1] != 0; i += 2) {
if (pa >= dump_avail[i] && pa < dump_avail[i + 1])
return (1);
}
return (0);
}
static void
pmap_kenter_temporary(vm_offset_t va, vm_paddr_t pa)
{
@ -276,7 +261,7 @@ minidumpsys(struct dumperinfo *di)
dumpsize += pmapsize;
VM_PAGE_DUMP_FOREACH(pa) {
/* Clear out undumpable pages now if needed */
if (is_dumpable(pa))
if (vm_phys_is_dumpable(pa))
dumpsize += PAGE_SIZE;
else
dump_drop_page(pa);

1
sys/powerpc/powerpc/uma_machdep.c
View File

@ -35,6 +35,7 @@ __FBSDID("$FreeBSD$");
#include <vm/vm_param.h>
#include <vm/pmap.h>
#include <vm/vm_page.h>
#include <vm/vm_phys.h>
#include <vm/vm_dumpset.h>
#include <vm/uma.h>
#include <vm/uma_int.h>

22
sys/riscv/riscv/minidump_machdep.c
View File

@ -99,22 +99,6 @@ report_progress(size_t progress, size_t dumpsize)
}
}
static bool
is_dumpable(vm_paddr_t pa)
{
vm_page_t m;
int i;
if ((m = vm_phys_paddr_to_vm_page(pa)) != NULL)
return ((m->flags & PG_NODUMP) == 0);
for (i = 0; dump_avail[i] != 0 || dump_avail[i + 1] != 0; i += 2) {
if (pa >= dump_avail[i] && pa < dump_avail[i + 1])
return (true);
}
return (false);
}
static int
blk_flush(struct dumperinfo *di)
{
@ -241,7 +225,7 @@ minidumpsys(struct dumperinfo *di)
if ((*l2 & PTE_RWX) != 0) {
pa = (*l2 >> PTE_PPN1_S) << L2_SHIFT;
for (i = 0; i < Ln_ENTRIES; i++, pa += PAGE_SIZE) {
if (is_dumpable(pa))
if (vm_phys_is_dumpable(pa))
dump_add_page(pa);
}
} else {
@ -249,7 +233,7 @@ minidumpsys(struct dumperinfo *di)
if ((l3[i] & PTE_V) == 0)
continue;
pa = (l3[i] >> PTE_PPN0_S) * PAGE_SIZE;
if (is_dumpable(pa))
if (vm_phys_is_dumpable(pa))
dump_add_page(pa);
}
}
@ -262,7 +246,7 @@ minidumpsys(struct dumperinfo *di)
dumpsize += round_page(BITSET_SIZE(vm_page_dump_pages));
VM_PAGE_DUMP_FOREACH(pa) {
/* Clear out undumpable pages now if needed */
if (is_dumpable(pa))
if (vm_phys_is_dumpable(pa))
dumpsize += PAGE_SIZE;
else
dump_drop_page(pa);

1
sys/riscv/riscv/uma_machdep.c
View File

@ -32,6 +32,7 @@ __FBSDID("$FreeBSD$");
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/vm_page.h>
#include <vm/vm_phys.h>
#include <vm/vm_dumpset.h>
#include <vm/uma.h>
#include <vm/uma_int.h>

19
sys/vm/vm_phys.c
View File

@ -1593,6 +1593,25 @@ vm_phys_avail_split(vm_paddr_t pa, int i)
return (0);
}
/*
* Check if a given physical address can be included as part of a crash dump.
*/
bool
vm_phys_is_dumpable(vm_paddr_t pa)
{
vm_page_t m;
int i;
if ((m = vm_phys_paddr_to_vm_page(pa)) != NULL)
return ((m->flags & PG_NODUMP) == 0);
for (i = 0; dump_avail[i] != 0 || dump_avail[i + 1] != 0; i += 2) {
if (pa >= dump_avail[i] && pa < dump_avail[i + 1])
return (true);
}
return (false);
}
void
vm_phys_early_add_seg(vm_paddr_t start, vm_paddr_t end)
{

1
sys/vm/vm_phys.h
View File

@ -87,6 +87,7 @@ vm_paddr_t vm_phys_early_alloc(int domain, size_t alloc_size);
void vm_phys_early_startup(void);
int vm_phys_avail_largest(void);
vm_paddr_t vm_phys_avail_size(int i);
bool vm_phys_is_dumpable(vm_paddr_t pa);
static inline int
vm_phys_domain(vm_paddr_t pa)