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drivers: base cacheinfo: Add support for ACPI based firmware tables

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Call ACPI cache parsing routines from base cacheinfo code if ACPI
is enabled. Also stub out cache_setup_acpi and acpi_find_last_cache_level
so that individual architectures can enable ACPI topology parsing.

Tested-by: Ard Biesheuvel <[email protected]>
Tested-by: Vijaya Kumar K <[email protected]>
Tested-by: Xiongfeng Wang <[email protected]>
Tested-by: Tomasz Nowicki <[email protected]>
Acked-by: Sudeep Holla <[email protected]>
Acked-by: Ard Biesheuvel <[email protected]>
Acked-by: Greg Kroah-Hartman <[email protected]>
Signed-off-by: Jeremy Linton <[email protected]>
Signed-off-by: Catalin Marinas <[email protected]>
This commit is contained in:
Jeremy Linton 2018-05-11 18:58:02 -05:00 • committed by Catalin Marinas
commit 582b468bdc
2 changed files with 27 additions and 4 deletions
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14
drivers/base/cacheinfo.c
View file

@ -206,7 +206,7 @@ static inline bool cache_leaves_are_shared(struct cacheinfo *this_leaf,
struct cacheinfo *sib_leaf)
{
/*
* For non-DT systems, assume unique level 1 cache, system-wide
* For non-DT/ACPI systems, assume unique level 1 caches, system-wide
* shared caches for all other levels. This will be used only if
* arch specific code has not populated shared_cpu_map
*/
@ -214,6 +214,11 @@ static inline bool cache_leaves_are_shared(struct cacheinfo *this_leaf,
}
#endif
int __weak cache_setup_acpi(unsigned int cpu)
{
return -ENOTSUPP;
}
static int cache_shared_cpu_map_setup(unsigned int cpu)
{
struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
@ -227,8 +232,8 @@ static int cache_shared_cpu_map_setup(unsigned int cpu)
if (of_have_populated_dt())
ret = cache_setup_of_node(cpu);
else if (!acpi_disabled)
/* No cache property/hierarchy support yet in ACPI */
ret = -ENOTSUPP;
ret = cache_setup_acpi(cpu);
if (ret)
return ret;
@ -279,7 +284,8 @@ static void cache_shared_cpu_map_remove(unsigned int cpu)
cpumask_clear_cpu(cpu, &sib_leaf->shared_cpu_map);
cpumask_clear_cpu(sibling, &this_leaf->shared_cpu_map);
}
of_node_put(this_leaf->fw_token);
if (of_have_populated_dt())
of_node_put(this_leaf->fw_token);
}
}