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authorJuergen Gross <jgross@suse.com>2022-11-02 10:47:11 +0300
committerBorislav Petkov <bp@suse.de>2022-11-10 15:12:45 +0300
commit30f89e524becdbaa483b34902b079c9d4dfaa4a3 (patch)
tree298cfde91b69aa719bf292b211d4a7fe6718f970 /include/linux/cpuhotplug.h
parentadfe7512e1d0b2e83215b0ec56337d2df9f1032d (diff)
downloadlinux-30f89e524becdbaa483b34902b079c9d4dfaa4a3.tar.xz
x86/cacheinfo: Switch cache_ap_init() to hotplug callback
Instead of explicitly calling cache_ap_init() in identify_secondary_cpu() use a CPU hotplug callback instead. By registering the callback only after having started the non-boot CPUs and initializing cache_aps_delayed_init with "true", calling set_cache_aps_delayed_init() at boot time can be dropped. It should be noted that this change results in cache_ap_init() being called a little bit later when hotplugging CPUs. By using a new hotplug slot right at the start of the low level bringup this is not problematic, as no operations requiring a specific caching mode are performed that early in CPU initialization. Suggested-by: Borislav Petkov <bp@alien8.de> Signed-off-by: Juergen Gross <jgross@suse.com> Signed-off-by: Borislav Petkov <bp@suse.de> Link: https://lore.kernel.org/r/20221102074713.21493-15-jgross@suse.com Signed-off-by: Borislav Petkov <bp@suse.de>
Diffstat (limited to 'include/linux/cpuhotplug.h')
-rw-r--r--include/linux/cpuhotplug.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/cpuhotplug.h b/include/linux/cpuhotplug.h
index f61447913db9..0d277b4b025a 100644
--- a/include/linux/cpuhotplug.h
+++ b/include/linux/cpuhotplug.h
@@ -140,6 +140,7 @@ enum cpuhp_state {
*/
CPUHP_AP_IDLE_DEAD,
CPUHP_AP_OFFLINE,
+ CPUHP_AP_CACHECTRL_STARTING,
CPUHP_AP_SCHED_STARTING,
CPUHP_AP_RCUTREE_DYING,
CPUHP_AP_CPU_PM_STARTING,