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linux/arch/x86/kernel/cpu/resctrl
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James Morse 9fe0450785 x86/resctrl: Preserve CDP enable over CPU hotplug 
Resctrl assumes that all CPUs are online when the filesystem is mounted,
and that CPUs remember their CDP-enabled state over CPU hotplug.

This goes wrong when resctrl's CDP-enabled state changes while all the
CPUs in a domain are offline.

When a domain comes online, enable (or disable!) CDP to match resctrl's
current setting.

Fixes: 5ff193fbde ("x86/intel_rdt: Add basic resctrl filesystem support")
Suggested-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: <stable@vger.kernel.org>
Link: https://lkml.kernel.org/r/20200221162105.154163-1-james.morse@arm.com
 		2020-04-17 19:35:01 +02:00
..
Makefile x86/resctrl: Avoid confusion over the new X86_RESCTRL config 2019-02-02 10:34:52 +01:00
core.c x86/resctrl: Preserve CDP enable over CPU hotplug 2020-04-17 19:35:01 +02:00
ctrlmondata.c x86/resctrl: Prevent NULL pointer dereference when reading mondata 2019-11-03 17:51:22 +01:00
internal.h x86/resctrl: Preserve CDP enable over CPU hotplug 2020-04-17 19:35:01 +02:00
monitor.c x86/resctrl: Check monitoring static key in the MBM overflow handler 2020-01-17 19:32:32 +01:00
pseudo_lock.c Merge branch 'x86-cache-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-07-08 17:25:53 -07:00
pseudo_lock_event.h
…
rdtgroup.c x86/resctrl: Preserve CDP enable over CPU hotplug 2020-04-17 19:35:01 +02:00