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ACPI / APEI: Make hest.c manage the estatus memory pool

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ghes.c has a memory pool it uses for the estatus cache and the estatus
queue. The cache is initialised when registering the platform driver.
For the queue, an NMI-like notification has to grow/shrink the pool
as it is registered and unregistered.

This is all pretty noisy when adding new NMI-like notifications, it
would be better to replace this with a static pool size based on the
number of users.

As a precursor, move the call that creates the pool from ghes_init(),
into hest.c. Later this will take the number of ghes entries and
consolidate the queue allocations.
Remove ghes_estatus_pool_exit() as hest.c doesn't have anywhere to put
this.

The pool is now initialised as part of ACPI's subsys_initcall():
(acpi_init(), acpi_scan_init(), acpi_pci_root_init(), acpi_hest_init())
Before this patch it happened later as a GHES specific device_initcall().

Signed-off-by: James Morse <james.morse@arm.com>
Reviewed-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
James Morse 2019-01-29 18:48:40 +00:00 committed by Rafael J. Wysocki
parent 0ac234be1a
commit e147133a42
3 changed files with 17 additions and 28 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

33
drivers/acpi/apei/ghes.c
View file

@ -162,26 +162,16 @@ static void ghes_iounmap_irq(void)
clear_fixmap(FIX_APEI_GHES_IRQ);
}
static int ghes_estatus_pool_init(void)
static int ghes_estatus_pool_expand(unsigned long len); //temporary
int ghes_estatus_pool_init(void)
{
ghes_estatus_pool = gen_pool_create(GHES_ESTATUS_POOL_MIN_ALLOC_ORDER, -1);
if (!ghes_estatus_pool)
return -ENOMEM;
return 0;
}
static void ghes_estatus_pool_free_chunk(struct gen_pool *pool,
struct gen_pool_chunk *chunk,
void *data)
{
vfree((void *)chunk->start_addr);
}
static void ghes_estatus_pool_exit(void)
{
gen_pool_for_each_chunk(ghes_estatus_pool,
ghes_estatus_pool_free_chunk, NULL);
gen_pool_destroy(ghes_estatus_pool);
return ghes_estatus_pool_expand(GHES_ESTATUS_CACHE_AVG_SIZE *
GHES_ESTATUS_CACHE_ALLOCED_MAX);
}
static int ghes_estatus_pool_expand(unsigned long len)
@ -1227,18 +1217,9 @@ static int __init ghes_init(void)
ghes_nmi_init_cxt();
rc = ghes_estatus_pool_init();
if (rc)
goto err;
rc = ghes_estatus_pool_expand(GHES_ESTATUS_CACHE_AVG_SIZE *
GHES_ESTATUS_CACHE_ALLOCED_MAX);
if (rc)
goto err_pool_exit;
rc = platform_driver_register(&ghes_platform_driver);
if (rc)
goto err_pool_exit;
goto err;
rc = apei_osc_setup();
if (rc == 0 && osc_sb_apei_support_acked)
@ -1251,8 +1232,6 @@ static int __init ghes_init(void)
pr_info(GHES_PFX "Failed to enable APEI firmware first mode.\n");
return 0;
err_pool_exit:
ghes_estatus_pool_exit();
err:
return rc;
}

10
drivers/acpi/apei/hest.c
View file

@ -32,6 +32,7 @@
#include <linux/io.h>
#include <linux/platform_device.h>
#include <acpi/apei.h>
#include <acpi/ghes.h>
#include "apei-internal.h"
@ -209,6 +210,11 @@ static int __init hest_ghes_dev_register(unsigned int ghes_count)
rc = apei_hest_parse(hest_parse_ghes, &ghes_arr);
if (rc)
goto err;
rc = ghes_estatus_pool_init();
if (rc)
goto err;
out:
kfree(ghes_arr.ghes_devs);
return rc;
@ -257,7 +263,9 @@ void __init acpi_hest_init(void)
rc = apei_hest_parse(hest_parse_ghes_count, &ghes_count);
if (rc)
goto err;
rc = hest_ghes_dev_register(ghes_count);
if (ghes_count)
rc = hest_ghes_dev_register(ghes_count);
if (rc)
goto err;
}

2
include/acpi/ghes.h
View file

@ -52,6 +52,8 @@ enum {
GHES_SEV_PANIC = 0x3,
};
int ghes_estatus_pool_init(void);
/* From drivers/edac/ghes_edac.c */
#ifdef CONFIG_EDAC_GHES