Merge remote-tracking branch 'tip/auto-latest'

[deliverable/linux.git] / arch / x86 / kernel / cpu / mcheck / mce.c

diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index 79d8ec849468e70ab42d7f5bfc19497578208a79..7f3f0e147242adf673f89fdbd5c7e6f86697a880 100644 (file)
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -41,6 +41,7 @@
 #include <linux/debugfs.h>
 #include <linux/irq_work.h>
 #include <linux/export.h>
+#include <linux/jump_label.h>
 
 #include <asm/processor.h>
 #include <asm/traps.h>
@@ -1633,17 +1634,6 @@ static int __mcheck_cpu_apply_quirks(struct cpuinfo_x86 *c)
 
                if (c->x86 == 6 && c->x86_model == 45)
                        quirk_no_way_out = quirk_sandybridge_ifu;
-               /*
-                * MCG_CAP.MCG_SER_P is necessary but not sufficient to know
-                * whether this processor will actually generate recoverable
-                * machine checks. Check to see if this is an E7 model Xeon.
-                * We can't do a model number check because E5 and E7 use the
-                * same model number. E5 doesn't support recovery, E7 does.
-                */
-               if (mca_cfg.recovery || (mca_cfg.ser &&
-                       !strncmp(c->x86_model_id,
-                                "Intel(R) Xeon(R) CPU E7-", 24)))
-                       set_cpu_cap(c, X86_FEATURE_MCE_RECOVERY);
        }
        if (cfg->monarch_timeout < 0)
                cfg->monarch_timeout = 0;
@@ -2080,6 +2070,7 @@ void mce_disable_bank(int bank)
  * mce=bootlog Log MCEs from before booting. Disabled by default on AMD.
  * mce=nobootlog Don't log MCEs from before booting.
  * mce=bios_cmci_threshold Don't program the CMCI threshold
+ * mce=recovery force enable memcpy_mcsafe()
  */
 static int __init mcheck_enable(char *str)
 {
@@ -2676,8 +2667,14 @@ static int __init mcheck_debugfs_init(void)
 static int __init mcheck_debugfs_init(void) { return -EINVAL; }
 #endif
 
+DEFINE_STATIC_KEY_FALSE(mcsafe_key);
+EXPORT_SYMBOL_GPL(mcsafe_key);
+
 static int __init mcheck_late_init(void)
 {
+       if (mca_cfg.recovery)
+               static_branch_inc(&mcsafe_key);
+
        mcheck_debugfs_init();
 
        /*