From eda61c265f3656be8345fdf0334b3a77829437fc Mon Sep 17 00:00:00 2001 From: Vikas Shivappa Date: Wed, 9 Aug 2017 11:46:33 -0700 Subject: x86/intel_rdt/cqm: Clear the default RMID during hotcpu The user configured per cpu default RMID is not cleared during cpu hotplug. This may lead to incorrect RMID values after a cpu goes offline and again comes back online. Clear the per cpu default RMID during cpu offline and online handling. Reported-by: Prakyha Sai Praneeth Signed-off-by: Vikas Shivappa Signed-off-by: Thomas Gleixner Cc: ravi.v.shankar@intel.com Cc: tony.luck@intel.com Cc: fenghua.yu@intel.com Cc: peterz@infradead.org Cc: eranian@google.com Cc: ak@linux.intel.com Cc: davidcc@google.com Link: http://lkml.kernel.org/r/1502304395-7166-2-git-send-email-vikas.shivappa@linux.intel.com --- arch/x86/kernel/cpu/intel_rdt.c | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/x86/kernel/cpu/intel_rdt.c') diff --git a/arch/x86/kernel/cpu/intel_rdt.c b/arch/x86/kernel/cpu/intel_rdt.c index da4f3898d517..4b9edb2617a5 100644 --- a/arch/x86/kernel/cpu/intel_rdt.c +++ b/arch/x86/kernel/cpu/intel_rdt.c @@ -551,6 +551,7 @@ static void clear_closid_rmid(int cpu) struct intel_pqr_state *state = this_cpu_ptr(&pqr_state); per_cpu(rdt_cpu_default.closid, cpu) = 0; + per_cpu(rdt_cpu_default.rmid, cpu) = 0; state->closid = 0; state->rmid = 0; wrmsr(IA32_PQR_ASSOC, 0, 0); -- cgit