From 67d84b65a1fe6362ed6172c0f7bbb75cedb8346d Mon Sep 17 00:00:00 2001
From: Jan Beulich <jbeulich@novell.com>
Date: Wed, 9 Mar 2011 16:31:28 +0000
Subject: [PATCH] x86: MCE cleanup

Move some MCE data items into .data.read_mostly. Adjust some types,
and make some symbols static.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
---
 xen/arch/x86/cpu/mcheck/mce_intel.c | 30 ++++++++++++++++-------------
 xen/arch/x86/cpu/mcheck/vmce.c      |  8 +++++---
 2 files changed, 22 insertions(+), 16 deletions(-)

diff --git a/xen/arch/x86/cpu/mcheck/mce_intel.c b/xen/arch/x86/cpu/mcheck/mce_intel.c
index 2da2ffb881..5a783c8b95 100644
--- a/xen/arch/x86/cpu/mcheck/mce_intel.c
+++ b/xen/arch/x86/cpu/mcheck/mce_intel.c
@@ -25,7 +25,7 @@ static bool_t __read_mostly ser_support = 0;
 static bool_t __read_mostly mce_force_broadcast;
 boolean_param("mce_fb", mce_force_broadcast);
 
-static int nr_intel_ext_msrs = 0;
+static int __read_mostly nr_intel_ext_msrs;
 
 /* Thermal Hanlding */
 #ifdef CONFIG_X86_MCE_THERMAL
@@ -60,7 +60,7 @@ static void intel_thermal_interrupt(struct cpu_user_regs *regs)
 }
 
 /* Thermal interrupt handler for this CPU setup */
-static void (*vendor_thermal_interrupt)(struct cpu_user_regs *regs) 
+static void (*__read_mostly vendor_thermal_interrupt)(struct cpu_user_regs *regs)
         = unexpected_thermal_interrupt;
 
 fastcall void smp_thermal_interrupt(struct cpu_user_regs *regs)
@@ -156,8 +156,10 @@ static cpumask_t mce_fatal_cpus;
 static void mce_barrier_enter(struct mce_softirq_barrier *);
 static void mce_barrier_exit(struct mce_softirq_barrier *);
 
-struct mca_error_handler *mce_dhandlers, *mce_uhandlers;
-int mce_dhandler_num, mce_uhandler_num;
+static const struct mca_error_handler *__read_mostly mce_dhandlers;
+static const struct mca_error_handler *__read_mostly mce_uhandlers;
+static unsigned int __read_mostly mce_dhandler_num;
+static unsigned int __read_mostly mce_uhandler_num;
 
 enum mce_result
 {
@@ -174,12 +176,11 @@ static enum mce_result mce_action(struct cpu_user_regs *regs,
 {
     struct mc_info *local_mi;
     enum mce_result ret = MCER_NOERROR;
-    uint32_t i;
     struct mcinfo_common *mic = NULL;
     struct mca_handle_result mca_res;
     struct mca_binfo binfo;
-    struct mca_error_handler *handlers = mce_dhandlers;
-    int handler_num = mce_dhandler_num;
+    const struct mca_error_handler *handlers = mce_dhandlers;
+    unsigned int i, handler_num = mce_dhandler_num;
 
     /* When in mce context, regs is valid */
     if (regs)
@@ -724,8 +725,10 @@ static void intel_default_dhandler(int bnum,
         result->result = MCA_NO_ACTION;
 }
 
-struct mca_error_handler intel_mce_dhandlers[] =
-            {{is_async_memerr, intel_memerr_dhandler}, {default_check, intel_default_dhandler}};
+static const struct mca_error_handler intel_mce_dhandlers[] = {
+    {is_async_memerr, intel_memerr_dhandler},
+    {default_check, intel_default_dhandler}
+};
 
 static void intel_default_uhandler(int bnum,
              struct mca_binfo *binfo,
@@ -749,8 +752,9 @@ static void intel_default_uhandler(int bnum,
     }
 }
 
-struct mca_error_handler intel_mce_uhandlers[] =
-            {{default_check, intel_default_uhandler}};
+static const struct mca_error_handler intel_mce_uhandlers[] = {
+    {default_check, intel_default_uhandler}
+};
 
 static void intel_machine_check(struct cpu_user_regs * regs, long error_code)
 {
@@ -1222,9 +1226,9 @@ static void intel_init_mce(void)
     mce_need_clearbank_register(intel_need_clearbank_scan);
 
     mce_dhandlers = intel_mce_dhandlers;
-    mce_dhandler_num = sizeof(intel_mce_dhandlers)/sizeof(struct mca_error_handler);
+    mce_dhandler_num = ARRAY_SIZE(intel_mce_dhandlers);
     mce_uhandlers = intel_mce_uhandlers;
-    mce_uhandler_num = sizeof(intel_mce_uhandlers)/sizeof(struct mca_error_handler);
+    mce_uhandler_num = ARRAY_SIZE(intel_mce_uhandlers);
 }
 
 static void cpu_mcabank_free(unsigned int cpu)
diff --git a/xen/arch/x86/cpu/mcheck/vmce.c b/xen/arch/x86/cpu/mcheck/vmce.c
index 123d1dcfc7..678f0c73a8 100644
--- a/xen/arch/x86/cpu/mcheck/vmce.c
+++ b/xen/arch/x86/cpu/mcheck/vmce.c
@@ -20,11 +20,11 @@
 
 #define dom_vmce(x)   ((x)->arch.vmca_msrs)
 
-uint64_t g_mcg_cap;
+static uint64_t __read_mostly g_mcg_cap;
 
 /* Real value in physical CTL MSR */
-uint64_t h_mcg_ctl = 0UL;
-uint64_t *h_mci_ctrl;
+static uint64_t __read_mostly h_mcg_ctl;
+static uint64_t *__read_mostly h_mci_ctrl;
 
 int vmce_init_msr(struct domain *d)
 {
@@ -425,6 +425,7 @@ int fill_vmsr_data(struct mcinfo_bank *mc_bank, struct domain *d,
     return 0;
 }
 
+#if 0 /* currently unused */
 int vmce_domain_inject(
     struct mcinfo_bank *bank, struct domain *d, struct mcinfo_global *global)
 {
@@ -436,6 +437,7 @@ int vmce_domain_inject(
 
     return inject_vmce(d);
 }
+#endif
 
 int vmce_init(struct cpuinfo_x86 *c)
 {
-- 
2.30.2