xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

x86/topology: Create topology_max_die_per_package()

Browse Source 
topology_max_packages() is available to size resources to cover all
packages in the system.

But now multi-die/package systems are coming up, and some resources are
per-die.

Create topology_max_die_per_package(), for detecting multi-die/package
systems, and sizing any per-die resources.

Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/e6eaf384571ae52ac7d0ca41510b7fb7d2fda0e4.1557769318.git.len.brown@intel.com
This commit is contained in:
Len Brown
2019-05-13 13:58:46 -04:00
committed by Thomas Gleixner
parent 7745f03eb3
commit 14d96d6c06
3 changed files with 14 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
arch/x86/kernel/cpu/topology.c
View File

@@ -26,6 +26,9 @@
#define LEVEL_MAX_SIBLINGS(ebx) ((ebx) & 0xffff)
#ifdef CONFIG_SMP
unsigned int __max_die_per_package __read_mostly = 1;
EXPORT_SYMBOL(__max_die_per_package);
/*
* Check if given CPUID extended toplogy "leaf" is implemented
*/
@@ -146,7 +149,7 @@ int detect_extended_topology(struct cpuinfo_x86 *c)
c->apicid = apic->phys_pkg_id(c->initial_apicid, 0);
c->x86_max_cores = (core_level_siblings / smp_num_siblings);
c->x86_max_dies = (die_level_siblings / core_level_siblings);
__max_die_per_package = (die_level_siblings / core_level_siblings);
#endif
return 0;
}