[PATCH 1/3] x86/intel_rdt/cqm: Add fix to clear the default RMID during hotcpu

[Vikas Shivappa]

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 <sai.praneeth.prak...@intel.com>
Signed-off-by: Vikas Shivappa <vikas.shiva...@linux.intel.com>
---
 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);
-- 
1.9.1