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Date: Wed, 19 Mar 2008 14:26:00 -0300
From: Glauber de Oliveira Costa <gcosta@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: akpm@...ux-foundation.org, tglx@...utronix.de, mingo@...e.hu,
ak@...e.de, Glauber Costa <gcosta@...hat.com>
Subject: [PATCH 65/79] [PATCH] integrate start_secondary
From: Glauber Costa <gcosta@...hat.com>
It now looks the same between architectures, so we
merge it in smpboot.c. Minor differences goes inside
an ifdef
Signed-off-by: Glauber Costa <gcosta@...hat.com>
---
arch/x86/kernel/smpboot.c | 86 +++++++++++++++++++++++++++++++++++++++++-
arch/x86/kernel/smpboot_32.c | 75 ------------------------------------
arch/x86/kernel/smpboot_64.c | 63 ------------------------------
3 files changed, 85 insertions(+), 139 deletions(-)
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 69c1796..a36ae27 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -17,6 +17,7 @@
#include <asm/tlbflush.h>
#include <asm/mtrr.h>
#include <asm/nmi.h>
+#include <asm/vmi.h>
#include <linux/mc146818rtc.h>
#include <mach_apic.h>
@@ -229,6 +230,90 @@ void __cpuinit smp_callin(void)
cpu_set(cpuid, cpu_callin_map);
}
+/*
+ * Activate a secondary processor.
+ */
+void __cpuinit start_secondary(void *unused)
+{
+ /*
+ * Don't put *anything* before cpu_init(), SMP booting is too
+ * fragile that we want to limit the things done here to the
+ * most necessary things.
+ */
+#ifdef CONFIG_VMI
+ vmi_bringup();
+#endif
+ cpu_init();
+ preempt_disable();
+ smp_callin();
+
+ /* otherwise gcc will move up smp_processor_id before the cpu_init */
+ barrier();
+ /*
+ * Check TSC synchronization with the BP:
+ */
+ check_tsc_sync_target();
+
+ if (nmi_watchdog == NMI_IO_APIC) {
+ disable_8259A_irq(0);
+ enable_NMI_through_LVT0();
+ enable_8259A_irq(0);
+ }
+
+ /* This must be done before setting cpu_online_map */
+ set_cpu_sibling_map(raw_smp_processor_id());
+ wmb();
+
+ /*
+ * We need to hold call_lock, so there is no inconsistency
+ * between the time smp_call_function() determines number of
+ * IPI recipients, and the time when the determination is made
+ * for which cpus receive the IPI. Holding this
+ * lock helps us to not include this cpu in a currently in progress
+ * smp_call_function().
+ */
+ lock_ipi_call_lock();
+#ifdef CONFIG_X86_64
+ spin_lock(&vector_lock);
+
+ /* Setup the per cpu irq handling data structures */
+ __setup_vector_irq(smp_processor_id());
+ /*
+ * Allow the master to continue.
+ */
+ spin_unlock(&vector_lock);
+#endif
+ cpu_set(smp_processor_id(), cpu_online_map);
+ unlock_ipi_call_lock();
+ per_cpu(cpu_state, smp_processor_id()) = CPU_ONLINE;
+
+ setup_secondary_clock();
+
+ wmb();
+ cpu_idle();
+}
+
+#ifdef CONFIG_X86_32
+/*
+ * Everything has been set up for the secondary
+ * CPUs - they just need to reload everything
+ * from the task structure
+ * This function must not return.
+ */
+void __devinit initialize_secondary(void)
+{
+ /*
+ * We don't actually need to load the full TSS,
+ * basically just the stack pointer and the ip.
+ */
+
+ asm volatile(
+ "movl %0,%%esp\n\t"
+ "jmp *%1"
+ :
+ :"m" (current->thread.sp), "m" (current->thread.ip));
+}
+#endif
static void __cpuinit smp_apply_quirks(struct cpuinfo_x86 *c)
{
@@ -533,7 +618,6 @@ wakeup_secondary_cpu(int logical_apicid, unsigned long start_eip)
}
#endif /* WAKE_SECONDARY_VIA_NMI */
-extern void start_secondary(void *unused);
#ifdef WAKE_SECONDARY_VIA_INIT
static int __devinit
wakeup_secondary_cpu(int phys_apicid, unsigned long start_eip)
diff --git a/arch/x86/kernel/smpboot_32.c b/arch/x86/kernel/smpboot_32.c
index e82eeb2..77b045c 100644
--- a/arch/x86/kernel/smpboot_32.c
+++ b/arch/x86/kernel/smpboot_32.c
@@ -80,81 +80,6 @@ extern void unmap_cpu_to_logical_apicid(int cpu);
/* State of each CPU. */
DEFINE_PER_CPU(int, cpu_state) = { 0 };
-extern void smp_callin(void);
-
-/*
- * Activate a secondary processor.
- */
-void __cpuinit start_secondary(void *unused)
-{
- /*
- * Don't put *anything* before cpu_init(), SMP booting is too
- * fragile that we want to limit the things done here to the
- * most necessary things.
- */
-#ifdef CONFIG_VMI
- vmi_bringup();
-#endif
- cpu_init();
- preempt_disable();
- smp_callin();
-
- /* otherwise gcc will move up smp_processor_id before the cpu_init */
- barrier();
- /*
- * Check TSC synchronization with the BP:
- */
- check_tsc_sync_target();
-
- if (nmi_watchdog == NMI_IO_APIC) {
- disable_8259A_irq(0);
- enable_NMI_through_LVT0();
- enable_8259A_irq(0);
- }
-
- /* This must be done before setting cpu_online_map */
- set_cpu_sibling_map(raw_smp_processor_id());
- wmb();
-
- /*
- * We need to hold call_lock, so there is no inconsistency
- * between the time smp_call_function() determines number of
- * IPI recipients, and the time when the determination is made
- * for which cpus receive the IPI. Holding this
- * lock helps us to not include this cpu in a currently in progress
- * smp_call_function().
- */
- lock_ipi_call_lock();
- cpu_set(smp_processor_id(), cpu_online_map);
- unlock_ipi_call_lock();
- per_cpu(cpu_state, smp_processor_id()) = CPU_ONLINE;
-
- setup_secondary_clock();
-
- wmb();
- cpu_idle();
-}
-
-/*
- * Everything has been set up for the secondary
- * CPUs - they just need to reload everything
- * from the task structure
- * This function must not return.
- */
-void __devinit initialize_secondary(void)
-{
- /*
- * We don't actually need to load the full TSS,
- * basically just the stack pointer and the ip.
- */
-
- asm volatile(
- "movl %0,%%esp\n\t"
- "jmp *%1"
- :
- :"m" (current->thread.sp),"m" (current->thread.ip));
-}
-
#ifdef CONFIG_HOTPLUG_CPU
void cpu_exit_clear(void)
{
diff --git a/arch/x86/kernel/smpboot_64.c b/arch/x86/kernel/smpboot_64.c
index 71f13b1..60cd8cf 100644
--- a/arch/x86/kernel/smpboot_64.c
+++ b/arch/x86/kernel/smpboot_64.c
@@ -71,69 +71,6 @@ int smp_threads_ready;
/* State of each CPU */
DEFINE_PER_CPU(int, cpu_state) = { 0 };
-extern void smp_callin(void);
-/*
- * Setup code on secondary processor (after comming out of the trampoline)
- */
-void __cpuinit start_secondary(void)
-{
- /*
- * Dont put anything before smp_callin(), SMP
- * booting is too fragile that we want to limit the
- * things done here to the most necessary things.
- */
- cpu_init();
- preempt_disable();
- smp_callin();
-
- /* otherwise gcc will move up the smp_processor_id before the cpu_init */
- barrier();
-
- /*
- * Check TSC sync first:
- */
- check_tsc_sync_target();
-
- if (nmi_watchdog == NMI_IO_APIC) {
- disable_8259A_irq(0);
- enable_NMI_through_LVT0();
- enable_8259A_irq(0);
- }
-
- /*
- * The sibling maps must be set before turing the online map on for
- * this cpu
- */
- set_cpu_sibling_map(smp_processor_id());
-
- /*
- * We need to hold call_lock, so there is no inconsistency
- * between the time smp_call_function() determines number of
- * IPI recipients, and the time when the determination is made
- * for which cpus receive the IPI in genapic_flat.c. Holding this
- * lock helps us to not include this cpu in a currently in progress
- * smp_call_function().
- */
- lock_ipi_call_lock();
- spin_lock(&vector_lock);
-
- /* Setup the per cpu irq handling data structures */
- __setup_vector_irq(smp_processor_id());
- /*
- * Allow the master to continue.
- */
- spin_unlock(&vector_lock);
- cpu_set(smp_processor_id(), cpu_online_map);
- unlock_ipi_call_lock();
-
- per_cpu(cpu_state, smp_processor_id()) = CPU_ONLINE;
-
- setup_secondary_clock();
-
- wmb();
- cpu_idle();
-}
-
cycles_t cacheflush_time;
unsigned long cache_decay_ticks;
--
1.5.0.6
--
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