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-rw-r--r--arch/x86/mm/dump_pagetables.c84
-rw-r--r--arch/x86/mm/fault.c68
-rw-r--r--arch/x86/mm/numa.c21
-rw-r--r--arch/x86/mm/numa_32.c2
-rw-r--r--arch/x86/mm/pageattr.c70
-rw-r--r--arch/x86/mm/srat.c24
-rw-r--r--arch/x86/mm/tlb.c52
7 files changed, 195 insertions, 126 deletions
diff --git a/arch/x86/mm/dump_pagetables.c b/arch/x86/mm/dump_pagetables.c
index 0002a3a3308..20621d753d5 100644
--- a/arch/x86/mm/dump_pagetables.c
+++ b/arch/x86/mm/dump_pagetables.c
@@ -30,6 +30,7 @@ struct pg_state {
unsigned long start_address;
unsigned long current_address;
const struct addr_marker *marker;
+ bool to_dmesg;
};
struct addr_marker {
@@ -88,10 +89,28 @@ static struct addr_marker address_markers[] = {
#define PUD_LEVEL_MULT (PTRS_PER_PMD * PMD_LEVEL_MULT)
#define PGD_LEVEL_MULT (PTRS_PER_PUD * PUD_LEVEL_MULT)
+#define pt_dump_seq_printf(m, to_dmesg, fmt, args...) \
+({ \
+ if (to_dmesg) \
+ printk(KERN_INFO fmt, ##args); \
+ else \
+ if (m) \
+ seq_printf(m, fmt, ##args); \
+})
+
+#define pt_dump_cont_printf(m, to_dmesg, fmt, args...) \
+({ \
+ if (to_dmesg) \
+ printk(KERN_CONT fmt, ##args); \
+ else \
+ if (m) \
+ seq_printf(m, fmt, ##args); \
+})
+
/*
* Print a readable form of a pgprot_t to the seq_file
*/
-static void printk_prot(struct seq_file *m, pgprot_t prot, int level)
+static void printk_prot(struct seq_file *m, pgprot_t prot, int level, bool dmsg)
{
pgprotval_t pr = pgprot_val(prot);
static const char * const level_name[] =
@@ -99,47 +118,47 @@ static void printk_prot(struct seq_file *m, pgprot_t prot, int level)
if (!pgprot_val(prot)) {
/* Not present */
- seq_printf(m, " ");
+ pt_dump_cont_printf(m, dmsg, " ");
} else {
if (pr & _PAGE_USER)
- seq_printf(m, "USR ");
+ pt_dump_cont_printf(m, dmsg, "USR ");
else
- seq_printf(m, " ");
+ pt_dump_cont_printf(m, dmsg, " ");
if (pr & _PAGE_RW)
- seq_printf(m, "RW ");
+ pt_dump_cont_printf(m, dmsg, "RW ");
else
- seq_printf(m, "ro ");
+ pt_dump_cont_printf(m, dmsg, "ro ");
if (pr & _PAGE_PWT)
- seq_printf(m, "PWT ");
+ pt_dump_cont_printf(m, dmsg, "PWT ");
else
- seq_printf(m, " ");
+ pt_dump_cont_printf(m, dmsg, " ");
if (pr & _PAGE_PCD)
- seq_printf(m, "PCD ");
+ pt_dump_cont_printf(m, dmsg, "PCD ");
else
- seq_printf(m, " ");
+ pt_dump_cont_printf(m, dmsg, " ");
/* Bit 9 has a different meaning on level 3 vs 4 */
if (level <= 3) {
if (pr & _PAGE_PSE)
- seq_printf(m, "PSE ");
+ pt_dump_cont_printf(m, dmsg, "PSE ");
else
- seq_printf(m, " ");
+ pt_dump_cont_printf(m, dmsg, " ");
} else {
if (pr & _PAGE_PAT)
- seq_printf(m, "pat ");
+ pt_dump_cont_printf(m, dmsg, "pat ");
else
- seq_printf(m, " ");
+ pt_dump_cont_printf(m, dmsg, " ");
}
if (pr & _PAGE_GLOBAL)
- seq_printf(m, "GLB ");
+ pt_dump_cont_printf(m, dmsg, "GLB ");
else
- seq_printf(m, " ");
+ pt_dump_cont_printf(m, dmsg, " ");
if (pr & _PAGE_NX)
- seq_printf(m, "NX ");
+ pt_dump_cont_printf(m, dmsg, "NX ");
else
- seq_printf(m, "x ");
+ pt_dump_cont_printf(m, dmsg, "x ");
}
- seq_printf(m, "%s\n", level_name[level]);
+ pt_dump_cont_printf(m, dmsg, "%s\n", level_name[level]);
}
/*
@@ -178,7 +197,8 @@ static void note_page(struct seq_file *m, struct pg_state *st,
st->current_prot = new_prot;
st->level = level;
st->marker = address_markers;
- seq_printf(m, "---[ %s ]---\n", st->marker->name);
+ pt_dump_seq_printf(m, st->to_dmesg, "---[ %s ]---\n",
+ st->marker->name);
} else if (prot != cur || level != st->level ||
st->current_address >= st->marker[1].start_address) {
const char *unit = units;
@@ -188,17 +208,17 @@ static void note_page(struct seq_file *m, struct pg_state *st,
/*
* Now print the actual finished series
*/
- seq_printf(m, "0x%0*lx-0x%0*lx ",
- width, st->start_address,
- width, st->current_address);
+ pt_dump_seq_printf(m, st->to_dmesg, "0x%0*lx-0x%0*lx ",
+ width, st->start_address,
+ width, st->current_address);
delta = (st->current_address - st->start_address) >> 10;
while (!(delta & 1023) && unit[1]) {
delta >>= 10;
unit++;
}
- seq_printf(m, "%9lu%c ", delta, *unit);
- printk_prot(m, st->current_prot, st->level);
+ pt_dump_cont_printf(m, st->to_dmesg, "%9lu%c ", delta, *unit);
+ printk_prot(m, st->current_prot, st->level, st->to_dmesg);
/*
* We print markers for special areas of address space,
@@ -207,7 +227,8 @@ static void note_page(struct seq_file *m, struct pg_state *st,
*/
if (st->current_address >= st->marker[1].start_address) {
st->marker++;
- seq_printf(m, "---[ %s ]---\n", st->marker->name);
+ pt_dump_seq_printf(m, st->to_dmesg, "---[ %s ]---\n",
+ st->marker->name);
}
st->start_address = st->current_address;
@@ -296,7 +317,7 @@ static void walk_pud_level(struct seq_file *m, struct pg_state *st, pgd_t addr,
#define pgd_none(a) pud_none(__pud(pgd_val(a)))
#endif
-static void walk_pgd_level(struct seq_file *m)
+void ptdump_walk_pgd_level(struct seq_file *m, pgd_t *pgd)
{
#ifdef CONFIG_X86_64
pgd_t *start = (pgd_t *) &init_level4_pgt;
@@ -304,9 +325,12 @@ static void walk_pgd_level(struct seq_file *m)
pgd_t *start = swapper_pg_dir;
#endif
int i;
- struct pg_state st;
+ struct pg_state st = {};
- memset(&st, 0, sizeof(st));
+ if (pgd) {
+ start = pgd;
+ st.to_dmesg = true;
+ }
for (i = 0; i < PTRS_PER_PGD; i++) {
st.current_address = normalize_addr(i * PGD_LEVEL_MULT);
@@ -331,7 +355,7 @@ static void walk_pgd_level(struct seq_file *m)
static int ptdump_show(struct seq_file *m, void *v)
{
- walk_pgd_level(m);
+ ptdump_walk_pgd_level(m, NULL);
return 0;
}
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index 9d591c89580..8e572299267 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -584,8 +584,13 @@ show_fault_oops(struct pt_regs *regs, unsigned long error_code,
if (error_code & PF_INSTR) {
unsigned int level;
+ pgd_t *pgd;
+ pte_t *pte;
- pte_t *pte = lookup_address(address, &level);
+ pgd = __va(read_cr3() & PHYSICAL_PAGE_MASK);
+ pgd += pgd_index(address);
+
+ pte = lookup_address_in_pgd(pgd, address, &level);
if (pte && pte_present(*pte) && !pte_exec(*pte))
printk(nx_warning, from_kuid(&init_user_ns, current_uid()));
@@ -1001,6 +1006,12 @@ static int fault_in_kernel_space(unsigned long address)
static inline bool smap_violation(int error_code, struct pt_regs *regs)
{
+ if (!IS_ENABLED(CONFIG_X86_SMAP))
+ return false;
+
+ if (!static_cpu_has(X86_FEATURE_SMAP))
+ return false;
+
if (error_code & PF_USER)
return false;
@@ -1014,13 +1025,17 @@ static inline bool smap_violation(int error_code, struct pt_regs *regs)
* This routine handles page faults. It determines the address,
* and the problem, and then passes it off to one of the appropriate
* routines.
+ *
+ * This function must have noinline because both callers
+ * {,trace_}do_page_fault() have notrace on. Having this an actual function
+ * guarantees there's a function trace entry.
*/
-static void __kprobes
-__do_page_fault(struct pt_regs *regs, unsigned long error_code)
+static void __kprobes noinline
+__do_page_fault(struct pt_regs *regs, unsigned long error_code,
+ unsigned long address)
{
struct vm_area_struct *vma;
struct task_struct *tsk;
- unsigned long address;
struct mm_struct *mm;
int fault;
unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE;
@@ -1028,9 +1043,6 @@ __do_page_fault(struct pt_regs *regs, unsigned long error_code)
tsk = current;
mm = tsk->mm;
- /* Get the faulting address: */
- address = read_cr2();
-
/*
* Detect and handle instructions that would cause a page fault for
* both a tracked kernel page and a userspace page.
@@ -1087,11 +1099,9 @@ __do_page_fault(struct pt_regs *regs, unsigned long error_code)
if (unlikely(error_code & PF_RSVD))
pgtable_bad(regs, error_code, address);
- if (static_cpu_has(X86_FEATURE_SMAP)) {
- if (unlikely(smap_violation(error_code, regs))) {
- bad_area_nosemaphore(regs, error_code, address);
- return;
- }
+ if (unlikely(smap_violation(error_code, regs))) {
+ bad_area_nosemaphore(regs, error_code, address);
+ return;
}
/*
@@ -1244,32 +1254,50 @@ good_area:
up_read(&mm->mmap_sem);
}
-dotraplinkage void __kprobes
+dotraplinkage void __kprobes notrace
do_page_fault(struct pt_regs *regs, unsigned long error_code)
{
+ unsigned long address = read_cr2(); /* Get the faulting address */
enum ctx_state prev_state;
+ /*
+ * We must have this function tagged with __kprobes, notrace and call
+ * read_cr2() before calling anything else. To avoid calling any kind
+ * of tracing machinery before we've observed the CR2 value.
+ *
+ * exception_{enter,exit}() contain all sorts of tracepoints.
+ */
+
prev_state = exception_enter();
- __do_page_fault(regs, error_code);
+ __do_page_fault(regs, error_code, address);
exception_exit(prev_state);
}
-static void trace_page_fault_entries(struct pt_regs *regs,
+#ifdef CONFIG_TRACING
+static void trace_page_fault_entries(unsigned long address, struct pt_regs *regs,
unsigned long error_code)
{
if (user_mode(regs))
- trace_page_fault_user(read_cr2(), regs, error_code);
+ trace_page_fault_user(address, regs, error_code);
else
- trace_page_fault_kernel(read_cr2(), regs, error_code);
+ trace_page_fault_kernel(address, regs, error_code);
}
-dotraplinkage void __kprobes
+dotraplinkage void __kprobes notrace
trace_do_page_fault(struct pt_regs *regs, unsigned long error_code)
{
+ /*
+ * The exception_enter and tracepoint processing could
+ * trigger another page faults (user space callchain
+ * reading) and destroy the original cr2 value, so read
+ * the faulting address now.
+ */
+ unsigned long address = read_cr2();
enum ctx_state prev_state;
prev_state = exception_enter();
- trace_page_fault_entries(regs, error_code);
- __do_page_fault(regs, error_code);
+ trace_page_fault_entries(address, regs, error_code);
+ __do_page_fault(regs, error_code, address);
exception_exit(prev_state);
}
+#endif /* CONFIG_TRACING */
diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c
index 81b2750f366..27aa0455fab 100644
--- a/arch/x86/mm/numa.c
+++ b/arch/x86/mm/numa.c
@@ -493,14 +493,6 @@ static int __init numa_register_memblks(struct numa_meminfo *mi)
struct numa_memblk *mb = &mi->blk[i];
memblock_set_node(mb->start, mb->end - mb->start,
&memblock.memory, mb->nid);
-
- /*
- * At this time, all memory regions reserved by memblock are
- * used by the kernel. Set the nid in memblock.reserved will
- * mark out all the nodes the kernel resides in.
- */
- memblock_set_node(mb->start, mb->end - mb->start,
- &memblock.reserved, mb->nid);
}
/*
@@ -565,10 +557,21 @@ static void __init numa_init_array(void)
static void __init numa_clear_kernel_node_hotplug(void)
{
int i, nid;
- nodemask_t numa_kernel_nodes;
+ nodemask_t numa_kernel_nodes = NODE_MASK_NONE;
unsigned long start, end;
struct memblock_type *type = &memblock.reserved;
+ /*
+ * At this time, all memory regions reserved by memblock are
+ * used by the kernel. Set the nid in memblock.reserved will
+ * mark out all the nodes the kernel resides in.
+ */
+ for (i = 0; i < numa_meminfo.nr_blks; i++) {
+ struct numa_memblk *mb = &numa_meminfo.blk[i];
+ memblock_set_node(mb->start, mb->end - mb->start,
+ &memblock.reserved, mb->nid);
+ }
+
/* Mark all kernel nodes. */
for (i = 0; i < type->cnt; i++)
node_set(type->regions[i].nid, numa_kernel_nodes);
diff --git a/arch/x86/mm/numa_32.c b/arch/x86/mm/numa_32.c
index 0342d27ca79..47b6436e41c 100644
--- a/arch/x86/mm/numa_32.c
+++ b/arch/x86/mm/numa_32.c
@@ -52,6 +52,8 @@ void memory_present(int nid, unsigned long start, unsigned long end)
nid, start, end);
printk(KERN_DEBUG " Setting physnode_map array to node %d for pfns:\n", nid);
printk(KERN_DEBUG " ");
+ start = round_down(start, PAGES_PER_SECTION);
+ end = round_up(end, PAGES_PER_SECTION);
for (pfn = start; pfn < end; pfn += PAGES_PER_SECTION) {
physnode_map[pfn / PAGES_PER_SECTION] = nid;
printk(KERN_CONT "%lx ", pfn);
diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
index b3b19f46c01..ae242a7c11c 100644
--- a/arch/x86/mm/pageattr.c
+++ b/arch/x86/mm/pageattr.c
@@ -126,8 +126,8 @@ within(unsigned long addr, unsigned long start, unsigned long end)
* @vaddr: virtual start address
* @size: number of bytes to flush
*
- * clflush is an unordered instruction which needs fencing with mfence
- * to avoid ordering issues.
+ * clflushopt is an unordered instruction which needs fencing with mfence or
+ * sfence to avoid ordering issues.
*/
void clflush_cache_range(void *vaddr, unsigned int size)
{
@@ -136,11 +136,11 @@ void clflush_cache_range(void *vaddr, unsigned int size)
mb();
for (; vaddr < vend; vaddr += boot_cpu_data.x86_clflush_size)
- clflush(vaddr);
+ clflushopt(vaddr);
/*
* Flush any possible final partial cacheline:
*/
- clflush(vend);
+ clflushopt(vend);
mb();
}
@@ -323,8 +323,12 @@ static inline pgprot_t static_protections(pgprot_t prot, unsigned long address,
return prot;
}
-static pte_t *__lookup_address_in_pgd(pgd_t *pgd, unsigned long address,
- unsigned int *level)
+/*
+ * Lookup the page table entry for a virtual address in a specific pgd.
+ * Return a pointer to the entry and the level of the mapping.
+ */
+pte_t *lookup_address_in_pgd(pgd_t *pgd, unsigned long address,
+ unsigned int *level)
{
pud_t *pud;
pmd_t *pmd;
@@ -365,7 +369,7 @@ static pte_t *__lookup_address_in_pgd(pgd_t *pgd, unsigned long address,
*/
pte_t *lookup_address(unsigned long address, unsigned int *level)
{
- return __lookup_address_in_pgd(pgd_offset_k(address), address, level);
+ return lookup_address_in_pgd(pgd_offset_k(address), address, level);
}
EXPORT_SYMBOL_GPL(lookup_address);
@@ -373,7 +377,7 @@ static pte_t *_lookup_address_cpa(struct cpa_data *cpa, unsigned long address,
unsigned int *level)
{
if (cpa->pgd)
- return __lookup_address_in_pgd(cpa->pgd + pgd_index(address),
+ return lookup_address_in_pgd(cpa->pgd + pgd_index(address),
address, level);
return lookup_address(address, level);
@@ -692,6 +696,18 @@ static bool try_to_free_pmd_page(pmd_t *pmd)
return true;
}
+static bool try_to_free_pud_page(pud_t *pud)
+{
+ int i;
+
+ for (i = 0; i < PTRS_PER_PUD; i++)
+ if (!pud_none(pud[i]))
+ return false;
+
+ free_page((unsigned long)pud);
+ return true;
+}
+
static bool unmap_pte_range(pmd_t *pmd, unsigned long start, unsigned long end)
{
pte_t *pte = pte_offset_kernel(pmd, start);
@@ -805,6 +821,16 @@ static void unmap_pud_range(pgd_t *pgd, unsigned long start, unsigned long end)
*/
}
+static void unmap_pgd_range(pgd_t *root, unsigned long addr, unsigned long end)
+{
+ pgd_t *pgd_entry = root + pgd_index(addr);
+
+ unmap_pud_range(pgd_entry, addr, end);
+
+ if (try_to_free_pud_page((pud_t *)pgd_page_vaddr(*pgd_entry)))
+ pgd_clear(pgd_entry);
+}
+
static int alloc_pte_page(pmd_t *pmd)
{
pte_t *pte = (pte_t *)get_zeroed_page(GFP_KERNEL | __GFP_NOTRACK);
@@ -999,9 +1025,8 @@ static int populate_pud(struct cpa_data *cpa, unsigned long start, pgd_t *pgd,
static int populate_pgd(struct cpa_data *cpa, unsigned long addr)
{
pgprot_t pgprot = __pgprot(_KERNPG_TABLE);
- bool allocd_pgd = false;
- pgd_t *pgd_entry;
pud_t *pud = NULL; /* shut up gcc */
+ pgd_t *pgd_entry;
int ret;
pgd_entry = cpa->pgd + pgd_index(addr);
@@ -1015,7 +1040,6 @@ static int populate_pgd(struct cpa_data *cpa, unsigned long addr)
return -1;
set_pgd(pgd_entry, __pgd(__pa(pud) | _KERNPG_TABLE));
- allocd_pgd = true;
}
pgprot_val(pgprot) &= ~pgprot_val(cpa->mask_clr);
@@ -1023,19 +1047,11 @@ static int populate_pgd(struct cpa_data *cpa, unsigned long addr)
ret = populate_pud(cpa, addr, pgd_entry, pgprot);
if (ret < 0) {
- unmap_pud_range(pgd_entry, addr,
+ unmap_pgd_range(cpa->pgd, addr,
addr + (cpa->numpages << PAGE_SHIFT));
-
- if (allocd_pgd) {
- /*
- * If I allocated this PUD page, I can just as well
- * free it in this error path.
- */
- pgd_clear(pgd_entry);
- free_page((unsigned long)pud);
- }
return ret;
}
+
cpa->numpages = ret;
return 0;
}
@@ -1377,10 +1393,10 @@ static int change_page_attr_set_clr(unsigned long *addr, int numpages,
cache = cache_attr(mask_set);
/*
- * On success we use clflush, when the CPU supports it to
- * avoid the wbindv. If the CPU does not support it and in the
+ * On success we use CLFLUSH, when the CPU supports it to
+ * avoid the WBINVD. If the CPU does not support it and in the
* error case we fall back to cpa_flush_all (which uses
- * wbindv):
+ * WBINVD):
*/
if (!ret && cpu_has_clflush) {
if (cpa.flags & (CPA_PAGES_ARRAY | CPA_ARRAY)) {
@@ -1861,6 +1877,12 @@ out:
return retval;
}
+void kernel_unmap_pages_in_pgd(pgd_t *root, unsigned long address,
+ unsigned numpages)
+{
+ unmap_pgd_range(root, address, address + (numpages << PAGE_SHIFT));
+}
+
/*
* The testcases use internal knowledge of the implementation that shouldn't
* be exposed to the rest of the kernel. Include these directly here.
diff --git a/arch/x86/mm/srat.c b/arch/x86/mm/srat.c
index 1a25187e151..66338a60aa6 100644
--- a/arch/x86/mm/srat.c
+++ b/arch/x86/mm/srat.c
@@ -42,15 +42,31 @@ static __init inline int srat_disabled(void)
return acpi_numa < 0;
}
-/* Callback for SLIT parsing */
+/*
+ * Callback for SLIT parsing. pxm_to_node() returns NUMA_NO_NODE for
+ * I/O localities since SRAT does not list them. I/O localities are
+ * not supported at this point.
+ */
void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
{
int i, j;
- for (i = 0; i < slit->locality_count; i++)
- for (j = 0; j < slit->locality_count; j++)
- numa_set_distance(pxm_to_node(i), pxm_to_node(j),
+ for (i = 0; i < slit->locality_count; i++) {
+ const int from_node = pxm_to_node(i);
+
+ if (from_node == NUMA_NO_NODE)
+ continue;
+
+ for (j = 0; j < slit->locality_count; j++) {
+ const int to_node = pxm_to_node(j);
+
+ if (to_node == NUMA_NO_NODE)
+ continue;
+
+ numa_set_distance(from_node, to_node,
slit->entry[slit->locality_count * i + j]);
+ }
+ }
}
/* Callback for Proximity Domain -> x2APIC mapping */
diff --git a/arch/x86/mm/tlb.c b/arch/x86/mm/tlb.c
index ae699b3bbac..dd8dda167a2 100644
--- a/arch/x86/mm/tlb.c
+++ b/arch/x86/mm/tlb.c
@@ -103,7 +103,7 @@ static void flush_tlb_func(void *info)
if (f->flush_mm != this_cpu_read(cpu_tlbstate.active_mm))
return;
- count_vm_event(NR_TLB_REMOTE_FLUSH_RECEIVED);
+ count_vm_tlb_event(NR_TLB_REMOTE_FLUSH_RECEIVED);
if (this_cpu_read(cpu_tlbstate.state) == TLBSTATE_OK) {
if (f->flush_end == TLB_FLUSH_ALL)
local_flush_tlb();
@@ -131,7 +131,7 @@ void native_flush_tlb_others(const struct cpumask *cpumask,
info.flush_start = start;
info.flush_end = end;
- count_vm_event(NR_TLB_REMOTE_FLUSH);
+ count_vm_tlb_event(NR_TLB_REMOTE_FLUSH);
if (is_uv_system()) {
unsigned int cpu;
@@ -151,44 +151,19 @@ void flush_tlb_current_task(void)
preempt_disable();
- count_vm_event(NR_TLB_LOCAL_FLUSH_ALL);
+ count_vm_tlb_event(NR_TLB_LOCAL_FLUSH_ALL);
local_flush_tlb();
if (cpumask_any_but(mm_cpumask(mm), smp_processor_id()) < nr_cpu_ids)
flush_tlb_others(mm_cpumask(mm), mm, 0UL, TLB_FLUSH_ALL);
preempt_enable();
}
-/*
- * It can find out the THP large page, or
- * HUGETLB page in tlb_flush when THP disabled
- */
-static inline unsigned long has_large_page(struct mm_struct *mm,
- unsigned long start, unsigned long end)
-{
- pgd_t *pgd;
- pud_t *pud;
- pmd_t *pmd;
- unsigned long addr = ALIGN(start, HPAGE_SIZE);
- for (; addr < end; addr += HPAGE_SIZE) {
- pgd = pgd_offset(mm, addr);
- if (likely(!pgd_none(*pgd))) {
- pud = pud_offset(pgd, addr);
- if (likely(!pud_none(*pud))) {
- pmd = pmd_offset(pud, addr);
- if (likely(!pmd_none(*pmd)))
- if (pmd_large(*pmd))
- return addr;
- }
- }
- }
- return 0;
-}
-
void flush_tlb_mm_range(struct mm_struct *mm, unsigned long start,
unsigned long end, unsigned long vmflag)
{
unsigned long addr;
unsigned act_entries, tlb_entries = 0;
+ unsigned long nr_base_pages;
preempt_disable();
if (current->active_mm != mm)
@@ -210,21 +185,20 @@ void flush_tlb_mm_range(struct mm_struct *mm, unsigned long start,
tlb_entries = tlb_lli_4k[ENTRIES];
else
tlb_entries = tlb_lld_4k[ENTRIES];
+
/* Assume all of TLB entries was occupied by this task */
- act_entries = mm->total_vm > tlb_entries ? tlb_entries : mm->total_vm;
+ act_entries = tlb_entries >> tlb_flushall_shift;
+ act_entries = mm->total_vm > act_entries ? act_entries : mm->total_vm;
+ nr_base_pages = (end - start) >> PAGE_SHIFT;
/* tlb_flushall_shift is on balance point, details in commit log */
- if ((end - start) >> PAGE_SHIFT > act_entries >> tlb_flushall_shift) {
- count_vm_event(NR_TLB_LOCAL_FLUSH_ALL);
+ if (nr_base_pages > act_entries) {
+ count_vm_tlb_event(NR_TLB_LOCAL_FLUSH_ALL);
local_flush_tlb();
} else {
- if (has_large_page(mm, start, end)) {
- local_flush_tlb();
- goto flush_all;
- }
/* flush range by one by one 'invlpg' */
for (addr = start; addr < end; addr += PAGE_SIZE) {
- count_vm_event(NR_TLB_LOCAL_FLUSH_ONE);
+ count_vm_tlb_event(NR_TLB_LOCAL_FLUSH_ONE);
__flush_tlb_single(addr);
}
@@ -262,7 +236,7 @@ void flush_tlb_page(struct vm_area_struct *vma, unsigned long start)
static void do_flush_tlb_all(void *info)
{
- count_vm_event(NR_TLB_REMOTE_FLUSH_RECEIVED);
+ count_vm_tlb_event(NR_TLB_REMOTE_FLUSH_RECEIVED);
__flush_tlb_all();
if (this_cpu_read(cpu_tlbstate.state) == TLBSTATE_LAZY)
leave_mm(smp_processor_id());
@@ -270,7 +244,7 @@ static void do_flush_tlb_all(void *info)
void flush_tlb_all(void)
{
- count_vm_event(NR_TLB_REMOTE_FLUSH);
+ count_vm_tlb_event(NR_TLB_REMOTE_FLUSH);
on_each_cpu(do_flush_tlb_all, NULL, 1);
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-10-10 07:31:57 +0000