mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-25 09:50:55 +07:00
Pull update-tlbflush-sn into release branch
This commit is contained in:
Tony Luck
commit
df080e7c94
@ -5,7 +5,7 @@
|
||||
* License. See the file "COPYING" in the main directory of this archive
|
||||
* for more details.
|
||||
*
|
||||
* Copyright (C) 2000-2005 Silicon Graphics, Inc. All rights reserved.
|
||||
* Copyright (C) 2000-2006 Silicon Graphics, Inc. All rights reserved.
|
||||
*/
|
||||
|
||||
#include <linux/init.h>
|
||||
@ -46,104 +46,28 @@ DECLARE_PER_CPU(struct ptc_stats, ptcstats);
|
||||
|
||||
static __cacheline_aligned DEFINE_SPINLOCK(sn2_global_ptc_lock);
|
||||
|
||||
void sn2_ptc_deadlock_recovery(short *, short, int, volatile unsigned long *, unsigned long data0,
|
||||
volatile unsigned long *, unsigned long data1);
|
||||
void sn2_ptc_deadlock_recovery(short *, short, short, int, volatile unsigned long *, unsigned long,
|
||||
volatile unsigned long *, unsigned long);
|
||||
|
||||
#ifdef DEBUG_PTC
|
||||
/*
|
||||
* ptctest:
|
||||
*
|
||||
* xyz - 3 digit hex number:
|
||||
* x - Force PTC purges to use shub:
|
||||
* 0 - no force
|
||||
* 1 - force
|
||||
* y - interupt enable
|
||||
* 0 - disable interrupts
|
||||
* 1 - leave interuupts enabled
|
||||
* z - type of lock:
|
||||
* 0 - global lock
|
||||
* 1 - node local lock
|
||||
* 2 - no lock
|
||||
*
|
||||
* Note: on shub1, only ptctest == 0 is supported. Don't try other values!
|
||||
* Note: some is the following is captured here to make degugging easier
|
||||
* (the macros make more sense if you see the debug patch - not posted)
|
||||
*/
|
||||
|
||||
static unsigned int sn2_ptctest = 0;
|
||||
|
||||
static int __init ptc_test(char *str)
|
||||
{
|
||||
get_option(&str, &sn2_ptctest);
|
||||
return 1;
|
||||
}
|
||||
__setup("ptctest=", ptc_test);
|
||||
|
||||
static inline int ptc_lock(unsigned long *flagp)
|
||||
{
|
||||
unsigned long opt = sn2_ptctest & 255;
|
||||
|
||||
switch (opt) {
|
||||
case 0x00:
|
||||
spin_lock_irqsave(&sn2_global_ptc_lock, *flagp);
|
||||
break;
|
||||
case 0x01:
|
||||
spin_lock_irqsave(&sn_nodepda->ptc_lock, *flagp);
|
||||
break;
|
||||
case 0x02:
|
||||
local_irq_save(*flagp);
|
||||
break;
|
||||
case 0x10:
|
||||
spin_lock(&sn2_global_ptc_lock);
|
||||
break;
|
||||
case 0x11:
|
||||
spin_lock(&sn_nodepda->ptc_lock);
|
||||
break;
|
||||
case 0x12:
|
||||
break;
|
||||
default:
|
||||
BUG();
|
||||
}
|
||||
return opt;
|
||||
}
|
||||
|
||||
static inline void ptc_unlock(unsigned long flags, int opt)
|
||||
{
|
||||
switch (opt) {
|
||||
case 0x00:
|
||||
spin_unlock_irqrestore(&sn2_global_ptc_lock, flags);
|
||||
break;
|
||||
case 0x01:
|
||||
spin_unlock_irqrestore(&sn_nodepda->ptc_lock, flags);
|
||||
break;
|
||||
case 0x02:
|
||||
local_irq_restore(flags);
|
||||
break;
|
||||
case 0x10:
|
||||
spin_unlock(&sn2_global_ptc_lock);
|
||||
break;
|
||||
case 0x11:
|
||||
spin_unlock(&sn_nodepda->ptc_lock);
|
||||
break;
|
||||
case 0x12:
|
||||
break;
|
||||
default:
|
||||
BUG();
|
||||
}
|
||||
}
|
||||
#else
|
||||
|
||||
#define sn2_ptctest 0
|
||||
#define local_node_uses_ptc_ga(sh1) ((sh1) ? 1 : 0)
|
||||
#define max_active_pio(sh1) ((sh1) ? 32 : 7)
|
||||
#define reset_max_active_on_deadlock() 1
|
||||
#define PTC_LOCK(sh1) ((sh1) ? &sn2_global_ptc_lock : &sn_nodepda->ptc_lock)
|
||||
|
||||
static inline int ptc_lock(unsigned long *flagp)
|
||||
static inline void ptc_lock(int sh1, unsigned long *flagp)
|
||||
{
|
||||
spin_lock_irqsave(&sn2_global_ptc_lock, *flagp);
|
||||
return 0;
|
||||
spin_lock_irqsave(PTC_LOCK(sh1), *flagp);
|
||||
}
|
||||
|
||||
static inline void ptc_unlock(unsigned long flags, int opt)
|
||||
static inline void ptc_unlock(int sh1, unsigned long flags)
|
||||
{
|
||||
spin_unlock_irqrestore(&sn2_global_ptc_lock, flags);
|
||||
spin_unlock_irqrestore(PTC_LOCK(sh1), flags);
|
||||
}
|
||||
#endif
|
||||
|
||||
struct ptc_stats {
|
||||
unsigned long ptc_l;
|
||||
@ -151,27 +75,30 @@ struct ptc_stats {
|
||||
unsigned long shub_ptc_flushes;
|
||||
unsigned long nodes_flushed;
|
||||
unsigned long deadlocks;
|
||||
unsigned long deadlocks2;
|
||||
unsigned long lock_itc_clocks;
|
||||
unsigned long shub_itc_clocks;
|
||||
unsigned long shub_itc_clocks_max;
|
||||
unsigned long shub_ptc_flushes_not_my_mm;
|
||||
};
|
||||
|
||||
static inline unsigned long wait_piowc(void)
|
||||
{
|
||||
volatile unsigned long *piows, zeroval;
|
||||
unsigned long ws;
|
||||
volatile unsigned long *piows;
|
||||
unsigned long zeroval, ws;
|
||||
|
||||
piows = pda->pio_write_status_addr;
|
||||
zeroval = pda->pio_write_status_val;
|
||||
do {
|
||||
cpu_relax();
|
||||
} while (((ws = *piows) & SH_PIO_WRITE_STATUS_PENDING_WRITE_COUNT_MASK) != zeroval);
|
||||
return ws;
|
||||
return (ws & SH_PIO_WRITE_STATUS_WRITE_DEADLOCK_MASK) != 0;
|
||||
}
|
||||
|
||||
void sn_tlb_migrate_finish(struct mm_struct *mm)
|
||||
{
|
||||
if (mm == current->mm)
|
||||
/* flush_tlb_mm is inefficient if more than 1 users of mm */
|
||||
if (mm == current->mm && mm && atomic_read(&mm->mm_users) == 1)
|
||||
flush_tlb_mm(mm);
|
||||
}
|
||||
|
||||
@ -201,12 +128,14 @@ void
|
||||
sn2_global_tlb_purge(struct mm_struct *mm, unsigned long start,
|
||||
unsigned long end, unsigned long nbits)
|
||||
{
|
||||
int i, opt, shub1, cnode, mynasid, cpu, lcpu = 0, nasid, flushed = 0;
|
||||
int mymm = (mm == current->active_mm && current->mm);
|
||||
int i, ibegin, shub1, cnode, mynasid, cpu, lcpu = 0, nasid;
|
||||
int mymm = (mm == current->active_mm && mm == current->mm);
|
||||
int use_cpu_ptcga;
|
||||
volatile unsigned long *ptc0, *ptc1;
|
||||
unsigned long itc, itc2, flags, data0 = 0, data1 = 0, rr_value;
|
||||
unsigned long itc, itc2, flags, data0 = 0, data1 = 0, rr_value, old_rr = 0;
|
||||
short nasids[MAX_NUMNODES], nix;
|
||||
nodemask_t nodes_flushed;
|
||||
int active, max_active, deadlock;
|
||||
|
||||
nodes_clear(nodes_flushed);
|
||||
i = 0;
|
||||
@ -267,41 +196,56 @@ sn2_global_tlb_purge(struct mm_struct *mm, unsigned long start,
|
||||
|
||||
|
||||
mynasid = get_nasid();
|
||||
use_cpu_ptcga = local_node_uses_ptc_ga(shub1);
|
||||
max_active = max_active_pio(shub1);
|
||||
|
||||
itc = ia64_get_itc();
|
||||
opt = ptc_lock(&flags);
|
||||
ptc_lock(shub1, &flags);
|
||||
itc2 = ia64_get_itc();
|
||||
|
||||
__get_cpu_var(ptcstats).lock_itc_clocks += itc2 - itc;
|
||||
__get_cpu_var(ptcstats).shub_ptc_flushes++;
|
||||
__get_cpu_var(ptcstats).nodes_flushed += nix;
|
||||
if (!mymm)
|
||||
__get_cpu_var(ptcstats).shub_ptc_flushes_not_my_mm++;
|
||||
|
||||
if (use_cpu_ptcga && !mymm) {
|
||||
old_rr = ia64_get_rr(start);
|
||||
ia64_set_rr(start, (old_rr & 0xff) | (rr_value << 8));
|
||||
ia64_srlz_d();
|
||||
}
|
||||
|
||||
wait_piowc();
|
||||
do {
|
||||
if (shub1)
|
||||
data1 = start | (1UL << SH1_PTC_1_START_SHFT);
|
||||
else
|
||||
data0 = (data0 & ~SH2_PTC_ADDR_MASK) | (start & SH2_PTC_ADDR_MASK);
|
||||
for (i = 0; i < nix; i++) {
|
||||
deadlock = 0;
|
||||
active = 0;
|
||||
for (ibegin = 0, i = 0; i < nix; i++) {
|
||||
nasid = nasids[i];
|
||||
if ((!(sn2_ptctest & 3)) && unlikely(nasid == mynasid && mymm)) {
|
||||
if (use_cpu_ptcga && unlikely(nasid == mynasid)) {
|
||||
ia64_ptcga(start, nbits << 2);
|
||||
ia64_srlz_i();
|
||||
} else {
|
||||
ptc0 = CHANGE_NASID(nasid, ptc0);
|
||||
if (ptc1)
|
||||
ptc1 = CHANGE_NASID(nasid, ptc1);
|
||||
pio_atomic_phys_write_mmrs(ptc0, data0, ptc1,
|
||||
data1);
|
||||
flushed = 1;
|
||||
pio_atomic_phys_write_mmrs(ptc0, data0, ptc1, data1);
|
||||
active++;
|
||||
}
|
||||
if (active >= max_active || i == (nix - 1)) {
|
||||
if ((deadlock = wait_piowc())) {
|
||||
sn2_ptc_deadlock_recovery(nasids, ibegin, i, mynasid, ptc0, data0, ptc1, data1);
|
||||
if (reset_max_active_on_deadlock())
|
||||
max_active = 1;
|
||||
}
|
||||
active = 0;
|
||||
ibegin = i + 1;
|
||||
}
|
||||
}
|
||||
if (flushed
|
||||
&& (wait_piowc() &
|
||||
(SH_PIO_WRITE_STATUS_WRITE_DEADLOCK_MASK))) {
|
||||
sn2_ptc_deadlock_recovery(nasids, nix, mynasid, ptc0, data0, ptc1, data1);
|
||||
}
|
||||
|
||||
start += (1UL << nbits);
|
||||
|
||||
} while (start < end);
|
||||
|
||||
itc2 = ia64_get_itc() - itc2;
|
||||
@ -309,7 +253,12 @@ sn2_global_tlb_purge(struct mm_struct *mm, unsigned long start,
|
||||
if (itc2 > __get_cpu_var(ptcstats).shub_itc_clocks_max)
|
||||
__get_cpu_var(ptcstats).shub_itc_clocks_max = itc2;
|
||||
|
||||
ptc_unlock(flags, opt);
|
||||
if (old_rr) {
|
||||
ia64_set_rr(start, old_rr);
|
||||
ia64_srlz_d();
|
||||
}
|
||||
|
||||
ptc_unlock(shub1, flags);
|
||||
|
||||
preempt_enable();
|
||||
}
|
||||
@ -321,27 +270,30 @@ sn2_global_tlb_purge(struct mm_struct *mm, unsigned long start,
|
||||
* TLB flush transaction. The recovery sequence is somewhat tricky & is
|
||||
* coded in assembly language.
|
||||
*/
|
||||
void sn2_ptc_deadlock_recovery(short *nasids, short nix, int mynasid, volatile unsigned long *ptc0, unsigned long data0,
|
||||
void sn2_ptc_deadlock_recovery(short *nasids, short ib, short ie, int mynasid, volatile unsigned long *ptc0, unsigned long data0,
|
||||
volatile unsigned long *ptc1, unsigned long data1)
|
||||
{
|
||||
extern void sn2_ptc_deadlock_recovery_core(volatile unsigned long *, unsigned long,
|
||||
extern unsigned long sn2_ptc_deadlock_recovery_core(volatile unsigned long *, unsigned long,
|
||||
volatile unsigned long *, unsigned long, volatile unsigned long *, unsigned long);
|
||||
short nasid, i;
|
||||
unsigned long *piows, zeroval;
|
||||
unsigned long *piows, zeroval, n;
|
||||
|
||||
__get_cpu_var(ptcstats).deadlocks++;
|
||||
|
||||
piows = (unsigned long *) pda->pio_write_status_addr;
|
||||
zeroval = pda->pio_write_status_val;
|
||||
|
||||
for (i=0; i < nix; i++) {
|
||||
|
||||
for (i=ib; i <= ie; i++) {
|
||||
nasid = nasids[i];
|
||||
if (!(sn2_ptctest & 3) && nasid == mynasid)
|
||||
if (local_node_uses_ptc_ga(is_shub1()) && nasid == mynasid)
|
||||
continue;
|
||||
ptc0 = CHANGE_NASID(nasid, ptc0);
|
||||
if (ptc1)
|
||||
ptc1 = CHANGE_NASID(nasid, ptc1);
|
||||
sn2_ptc_deadlock_recovery_core(ptc0, data0, ptc1, data1, piows, zeroval);
|
||||
|
||||
n = sn2_ptc_deadlock_recovery_core(ptc0, data0, ptc1, data1, piows, zeroval);
|
||||
__get_cpu_var(ptcstats).deadlocks2 += n;
|
||||
}
|
||||
|
||||
}
|
||||
@ -452,20 +404,22 @@ static int sn2_ptc_seq_show(struct seq_file *file, void *data)
|
||||
cpu = *(loff_t *) data;
|
||||
|
||||
if (!cpu) {
|
||||
seq_printf(file, "# ptc_l change_rid shub_ptc_flushes shub_nodes_flushed deadlocks lock_nsec shub_nsec shub_nsec_max\n");
|
||||
seq_printf(file,
|
||||
"# cpu ptc_l newrid ptc_flushes nodes_flushed deadlocks lock_nsec shub_nsec shub_nsec_max not_my_mm deadlock2\n");
|
||||
seq_printf(file, "# ptctest %d\n", sn2_ptctest);
|
||||
}
|
||||
|
||||
if (cpu < NR_CPUS && cpu_online(cpu)) {
|
||||
stat = &per_cpu(ptcstats, cpu);
|
||||
seq_printf(file, "cpu %d %ld %ld %ld %ld %ld %ld %ld %ld\n", cpu, stat->ptc_l,
|
||||
seq_printf(file, "cpu %d %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld\n", cpu, stat->ptc_l,
|
||||
stat->change_rid, stat->shub_ptc_flushes, stat->nodes_flushed,
|
||||
stat->deadlocks,
|
||||
1000 * stat->lock_itc_clocks / per_cpu(cpu_info, cpu).cyc_per_usec,
|
||||
1000 * stat->shub_itc_clocks / per_cpu(cpu_info, cpu).cyc_per_usec,
|
||||
1000 * stat->shub_itc_clocks_max / per_cpu(cpu_info, cpu).cyc_per_usec);
|
||||
1000 * stat->shub_itc_clocks_max / per_cpu(cpu_info, cpu).cyc_per_usec,
|
||||
stat->shub_ptc_flushes_not_my_mm,
|
||||
stat->deadlocks2);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
@ -476,7 +430,7 @@ static struct seq_operations sn2_ptc_seq_ops = {
|
||||
.show = sn2_ptc_seq_show
|
||||
};
|
||||
|
||||
int sn2_ptc_proc_open(struct inode *inode, struct file *file)
|
||||
static int sn2_ptc_proc_open(struct inode *inode, struct file *file)
|
||||
{
|
||||
return seq_open(file, &sn2_ptc_seq_ops);
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user