openkylin
/
platform_kernel-5.15
mirror of https://gitee.com/openkylin/platform_kernel-5.15.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

x86: use smp_call_function_single() in arch/x86/kernel/cpu/mcheck/mce_amd_64.c 

Attempting to rid us of the problematic work_on_cpu().  Just use
smp_call_function_single() here.

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
LKML-Reference: <20090318042217.EF3F1DDF39@ozlabs.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Andrew Morton 2009-03-18 10:40:25 +10:30 committed by Ingo Molnar
parent 514ec49a5f
commit a6b6a14e0c
1 changed files with 24 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

40
arch/x86/kernel/cpu/mcheck/mce_amd_64.c
View File

@ -92,7 +92,8 @@ struct thresh_restart {
}; };
/* must be called with correct cpu affinity */ /* must be called with correct cpu affinity */
static long threshold_restart_bank(void *_tr) /* Called via smp_call_function_single() */
static void threshold_restart_bank(void *_tr)
{ {
struct thresh_restart *tr = _tr; struct thresh_restart *tr = _tr;
u32 mci_misc_hi, mci_misc_lo; u32 mci_misc_hi, mci_misc_lo;
@ -119,7 +120,6 @@ static long threshold_restart_bank(void *_tr)
mci_misc_hi |= MASK_COUNT_EN_HI; mci_misc_hi |= MASK_COUNT_EN_HI;
wrmsr(tr->b->address, mci_misc_lo, mci_misc_hi); wrmsr(tr->b->address, mci_misc_lo, mci_misc_hi);
return 0;
} }
/* cpu init entry point, called from mce.c with preempt off */ /* cpu init entry point, called from mce.c with preempt off */
@ -279,7 +279,7 @@ static ssize_t store_interrupt_enable(struct threshold_block *b,
tr.b = b; tr.b = b;
tr.reset = 0; tr.reset = 0;
tr.old_limit = 0; tr.old_limit = 0;
work_on_cpu(b->cpu, threshold_restart_bank, &tr); smp_call_function_single(b->cpu, threshold_restart_bank, &tr, 1);
return end - buf; return end - buf;
} }
@ -301,23 +301,32 @@ static ssize_t store_threshold_limit(struct threshold_block *b,
tr.b = b; tr.b = b;
tr.reset = 0; tr.reset = 0;
work_on_cpu(b->cpu, threshold_restart_bank, &tr); smp_call_function_single(b->cpu, threshold_restart_bank, &tr, 1);
return end - buf; return end - buf;
} }
static long local_error_count(void *_b) struct threshold_block_cross_cpu {
struct threshold_block *tb;
long retval;
};
static void local_error_count_handler(void *_tbcc)
{ {
struct threshold_block *b = _b; struct threshold_block_cross_cpu *tbcc = _tbcc;
struct threshold_block *b = tbcc->tb;
u32 low, high; u32 low, high;
rdmsr(b->address, low, high); rdmsr(b->address, low, high);
return (high & 0xFFF) - (THRESHOLD_MAX - b->threshold_limit); tbcc->retval = (high & 0xFFF) - (THRESHOLD_MAX - b->threshold_limit);
} }
static ssize_t show_error_count(struct threshold_block *b, char *buf) static ssize_t show_error_count(struct threshold_block *b, char *buf)
{ {
return sprintf(buf, "%lx\n", work_on_cpu(b->cpu, local_error_count, b)); struct threshold_block_cross_cpu tbcc = { .tb = b, };
smp_call_function_single(b->cpu, local_error_count_handler, &tbcc, 1);
return sprintf(buf, "%lx\n", tbcc.retval);
} }
static ssize_t store_error_count(struct threshold_block *b, static ssize_t store_error_count(struct threshold_block *b,
@ -325,7 +334,7 @@ static ssize_t store_error_count(struct threshold_block *b,
{ {
struct thresh_restart tr = { .b = b, .reset = 1, .old_limit = 0 }; struct thresh_restart tr = { .b = b, .reset = 1, .old_limit = 0 };
work_on_cpu(b->cpu, threshold_restart_bank, &tr); smp_call_function_single(b->cpu, threshold_restart_bank, &tr, 1);
return 1; return 1;
} }
@ -394,7 +403,7 @@ static __cpuinit int allocate_threshold_blocks(unsigned int cpu,
if ((bank >= NR_BANKS) || (block >= NR_BLOCKS)) if ((bank >= NR_BANKS) || (block >= NR_BLOCKS))
return 0; return 0;
if (rdmsr_safe(address, &low, &high)) if (rdmsr_safe_on_cpu(cpu, address, &low, &high))
return 0; return 0;
if (!(high & MASK_VALID_HI)) { if (!(high & MASK_VALID_HI)) {
@ -458,12 +467,11 @@ static __cpuinit int allocate_threshold_blocks(unsigned int cpu,
return err; return err;
} }
static __cpuinit long local_allocate_threshold_blocks(void *_bank) static __cpuinit long
local_allocate_threshold_blocks(int cpu, unsigned int bank)
{ {
unsigned int *bank = _bank; return allocate_threshold_blocks(cpu, bank, 0,
MSR_IA32_MC0_MISC + bank * 4);
return allocate_threshold_blocks(smp_processor_id(), *bank, 0,
MSR_IA32_MC0_MISC + *bank * 4);
} }
/* symlinks sibling shared banks to first core. first core owns dir/files. */ /* symlinks sibling shared banks to first core. first core owns dir/files. */
@ -526,7 +534,7 @@ static __cpuinit int threshold_create_bank(unsigned int cpu, unsigned int bank)
per_cpu(threshold_banks, cpu)[bank] = b; per_cpu(threshold_banks, cpu)[bank] = b;
err = work_on_cpu(cpu, local_allocate_threshold_blocks, &bank); err = local_allocate_threshold_blocks(cpu, bank);
if (err) if (err)
goto out_free; goto out_free;