These changes are a raw update to a vanilla kernel 4.1.10, with the

[kvmfornfv.git] / kernel / arch / x86 / kernel / cpu / mcheck / mce_intel.c

diff --git a/kernel/arch/x86/kernel/cpu/mcheck/mce_intel.c b/kernel/arch/x86/kernel/cpu/mcheck/mce_intel.c
index b4a41cf..e166d83 100644 (file)
--- a/kernel/arch/x86/kernel/cpu/mcheck/mce_intel.c
+++ b/kernel/arch/x86/kernel/cpu/mcheck/mce_intel.c
@@ -116,6 +116,27 @@ void mce_intel_hcpu_update(unsigned long cpu)
        per_cpu(cmci_storm_state, cpu) = CMCI_STORM_NONE;
 }
 
+static void cmci_toggle_interrupt_mode(bool on)
+{
+       unsigned long flags, *owned;
+       int bank;
+       u64 val;
+
+       raw_spin_lock_irqsave(&cmci_discover_lock, flags);
+       owned = this_cpu_ptr(mce_banks_owned);
+       for_each_set_bit(bank, owned, MAX_NR_BANKS) {
+               rdmsrl(MSR_IA32_MCx_CTL2(bank), val);
+
+               if (on)
+                       val |= MCI_CTL2_CMCI_EN;
+               else
+                       val &= ~MCI_CTL2_CMCI_EN;
+
+               wrmsrl(MSR_IA32_MCx_CTL2(bank), val);
+       }
+       raw_spin_unlock_irqrestore(&cmci_discover_lock, flags);
+}
+
 unsigned long cmci_intel_adjust_timer(unsigned long interval)
 {
        if ((this_cpu_read(cmci_backoff_cnt) > 0) &&
@@ -145,7 +166,7 @@ unsigned long cmci_intel_adjust_timer(unsigned long interval)
                 */
                if (!atomic_read(&cmci_storm_on_cpus)) {
                        __this_cpu_write(cmci_storm_state, CMCI_STORM_NONE);
-                       cmci_reenable();
+                       cmci_toggle_interrupt_mode(true);
                        cmci_recheck();
                }
                return CMCI_POLL_INTERVAL;
@@ -156,22 +177,6 @@ unsigned long cmci_intel_adjust_timer(unsigned long interval)
        }
 }
 
-static void cmci_storm_disable_banks(void)
-{
-       unsigned long flags, *owned;
-       int bank;
-       u64 val;
-
-       raw_spin_lock_irqsave(&cmci_discover_lock, flags);
-       owned = this_cpu_ptr(mce_banks_owned);
-       for_each_set_bit(bank, owned, MAX_NR_BANKS) {
-               rdmsrl(MSR_IA32_MCx_CTL2(bank), val);
-               val &= ~MCI_CTL2_CMCI_EN;
-               wrmsrl(MSR_IA32_MCx_CTL2(bank), val);
-       }
-       raw_spin_unlock_irqrestore(&cmci_discover_lock, flags);
-}
-
 static bool cmci_storm_detect(void)
 {
        unsigned int cnt = __this_cpu_read(cmci_storm_cnt);
@@ -193,7 +198,7 @@ static bool cmci_storm_detect(void)
        if (cnt <= CMCI_STORM_THRESHOLD)
                return false;
 
-       cmci_storm_disable_banks();
+       cmci_toggle_interrupt_mode(false);
        __this_cpu_write(cmci_storm_state, CMCI_STORM_ACTIVE);
        r = atomic_add_return(1, &cmci_storm_on_cpus);
        mce_timer_kick(CMCI_STORM_INTERVAL);