Commit-ID: eda61c265f3656be8345fdf0334b3a77829437fc Gitweb: http://git.kernel.org/tip/eda61c265f3656be8345fdf0334b3a77829437fc Author: Vikas Shivappa <[email protected]> AuthorDate: Wed, 9 Aug 2017 11:46:33 -0700 Committer: Thomas Gleixner <[email protected]> CommitDate: Mon, 14 Aug 2017 11:47:46 +0200
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 <[email protected]> Signed-off-by: Vikas Shivappa <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] --- arch/x86/kernel/cpu/intel_rdt.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/kernel/cpu/intel_rdt.c b/arch/x86/kernel/cpu/intel_rdt.c index da4f389..4b9edb2 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);
