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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] x86: Remove non-CONFIG_HOTPLUG_CPU code, and general cleanup.
# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1258027158 0
# Node ID c983b21e75d22fbf68b4a356dbe25fa8f8374366
# Parent 08a7d164db9a67bb3ce8044a6174522438e960cd
x86: Remove non-CONFIG_HOTPLUG_CPU code, and general cleanup.
Signed-off-by: Keir Fraser <keir.fraser@xxxxxxxxxx>
---
xen/arch/x86/cpu/common.c | 2
xen/arch/x86/irq.c | 32 +++---
xen/arch/x86/setup.c | 4
xen/arch/x86/smpboot.c | 212 ++++++++++++++++++----------------------------
xen/include/asm-x86/smp.h | 7 -
5 files changed, 102 insertions(+), 155 deletions(-)
diff -r 08a7d164db9a -r c983b21e75d2 xen/arch/x86/cpu/common.c
--- a/xen/arch/x86/cpu/common.c Thu Nov 12 11:43:21 2009 +0000
+++ b/xen/arch/x86/cpu/common.c Thu Nov 12 11:59:18 2009 +0000
@@ -615,10 +615,8 @@ void __cpuinit cpu_init(void)
#undef CD
}
-#ifdef CONFIG_HOTPLUG_CPU
void __cpuinit cpu_uninit(void)
{
int cpu = raw_smp_processor_id();
cpu_clear(cpu, cpu_initialized);
}
-#endif
diff -r 08a7d164db9a -r c983b21e75d2 xen/arch/x86/irq.c
--- a/xen/arch/x86/irq.c Thu Nov 12 11:43:21 2009 +0000
+++ b/xen/arch/x86/irq.c Thu Nov 12 11:59:18 2009 +0000
@@ -7,6 +7,7 @@
#include <xen/config.h>
#include <xen/init.h>
+#include <xen/delay.h>
#include <xen/errno.h>
#include <xen/event.h>
#include <xen/irq.h>
@@ -1638,10 +1639,6 @@ static int __init setup_dump_irqs(void)
}
__initcall(setup_dump_irqs);
-#ifdef CONFIG_HOTPLUG_CPU
-#include <asm/mach-generic/mach_apic.h>
-#include <xen/delay.h>
-
/* A cpu has been removed from cpu_online_mask. Re-set irq affinities. */
void fixup_irqs(void)
{
@@ -1650,19 +1647,23 @@ void fixup_irqs(void)
struct irq_desc *desc;
irq_guest_action_t *action;
struct pending_eoi *peoi;
- for(irq = 0; irq < nr_irqs; irq++ ) {
+
+ for ( irq = 0; irq < nr_irqs; irq++ )
+ {
int break_affinity = 0;
int set_affinity = 1;
cpumask_t affinity;
- if (irq == 2)
+
+ if ( irq == 2 )
continue;
+
desc = irq_to_desc(irq);
- /* interrupt's are disabled at this point */
+
spin_lock(&desc->lock);
affinity = desc->affinity;
- if (!desc->action ||
- cpus_equal(affinity, cpu_online_map)) {
+ if ( !desc->action || cpus_equal(affinity, cpu_online_map) )
+ {
spin_unlock(&desc->lock);
continue;
}
@@ -1674,22 +1675,22 @@ void fixup_irqs(void)
affinity = cpu_online_map;
}
- if (desc->handler->disable)
+ if ( desc->handler->disable )
desc->handler->disable(irq);
- if (desc->handler->set_affinity)
+ if ( desc->handler->set_affinity )
desc->handler->set_affinity(irq, affinity);
- else if (!(warned++))
+ else if ( !(warned++) )
set_affinity = 0;
- if (desc->handler->enable)
+ if ( desc->handler->enable )
desc->handler->enable(irq);
spin_unlock(&desc->lock);
- if (break_affinity && set_affinity)
+ if ( break_affinity && set_affinity )
printk("Broke affinity for irq %i\n", irq);
- else if (!set_affinity)
+ else if ( !set_affinity )
printk("Cannot set affinity for irq %i\n", irq);
}
@@ -1714,4 +1715,3 @@ void fixup_irqs(void)
peoi[sp].ready = 1;
flush_ready_eoi();
}
-#endif
diff -r 08a7d164db9a -r c983b21e75d2 xen/arch/x86/setup.c
--- a/xen/arch/x86/setup.c Thu Nov 12 11:43:21 2009 +0000
+++ b/xen/arch/x86/setup.c Thu Nov 12 11:59:18 2009 +0000
@@ -483,10 +483,6 @@ void __init __start_xen(unsigned long mb
asm volatile ( "mov %%cr4,%0" : "=r" (this_cpu(cr4)) );
smp_prepare_boot_cpu();
-
-#ifdef CONFIG_HOTPLUG_CPU
- prefill_possible_map();
-#endif
/* We initialise the serial devices very early so we can get debugging. */
ns16550.io_base = 0x3f8;
diff -r 08a7d164db9a -r c983b21e75d2 xen/arch/x86/smpboot.c
--- a/xen/arch/x86/smpboot.c Thu Nov 12 11:43:21 2009 +0000
+++ b/xen/arch/x86/smpboot.c Thu Nov 12 11:59:18 2009 +0000
@@ -58,7 +58,6 @@
#include <xen/stop_machine.h>
#include <acpi/cpufreq/processor_perf.h>
-#define set_kernel_exec(x, y) (0)
#define setup_trampoline() (bootsym_phys(trampoline_realmode_entry))
/* Set if we find a B stepping CPU */
@@ -82,7 +81,7 @@ cpumask_t cpu_callin_map;
cpumask_t cpu_callin_map;
cpumask_t cpu_callout_map;
EXPORT_SYMBOL(cpu_callout_map);
-cpumask_t cpu_possible_map;
+cpumask_t cpu_possible_map = CPU_MASK_ALL;
EXPORT_SYMBOL(cpu_possible_map);
static cpumask_t smp_commenced_mask;
@@ -491,8 +490,8 @@ void __devinit start_secondary(void *unu
set_processor_id(cpu);
set_current(idle_vcpu[cpu]);
this_cpu(curr_vcpu) = idle_vcpu[cpu];
- if ( cpu_has_efer )
- rdmsrl(MSR_EFER, this_cpu(efer));
+ if ( cpu_has_efer )
+ rdmsrl(MSR_EFER, this_cpu(efer));
asm volatile ( "mov %%cr4,%0" : "=r" (this_cpu(cr4)) );
percpu_traps_init();
@@ -521,11 +520,11 @@ void __devinit start_secondary(void *unu
set_cpu_sibling_map(raw_smp_processor_id());
wmb();
- /* Initlize vector_irq for BSPs */
- lock_vector_lock();
- __setup_vector_irq(smp_processor_id());
+ /* Initlize vector_irq for BSPs */
+ lock_vector_lock();
+ __setup_vector_irq(smp_processor_id());
cpu_set(smp_processor_id(), cpu_online_map);
- unlock_vector_lock();
+ unlock_vector_lock();
per_cpu(cpu_state, smp_processor_id()) = CPU_ONLINE;
@@ -767,10 +766,8 @@ wakeup_secondary_cpu(int phys_apicid, un
do {
Dprintk("+");
udelay(100);
- if ( !x2apic_enabled )
- send_status = apic_read(APIC_ICR) &
APIC_ICR_BUSY;
- else
- send_status = 0; /* We go out of the loop dirctly.
*/
+ send_status = (x2apic_enabled ? 0 :
+ apic_read(APIC_ICR) & APIC_ICR_BUSY);
} while (send_status && (timeout++ < 1000));
/*
@@ -837,7 +834,7 @@ static int __devinit do_boot_cpu(int api
struct vcpu *v;
struct desc_struct *gdt;
#ifdef __x86_64__
- struct page_info *page;
+ struct page_info *page;
#endif
/*
@@ -963,11 +960,11 @@ static int __devinit do_boot_cpu(int api
cpu_clear(cpu, cpu_initialized); /* was set by cpu_init() */
cpucount--;
- /* Mark the CPU as non-present */
- spin_lock(&cpu_add_remove_lock);
+ /* Mark the CPU as non-present */
+ spin_lock(&cpu_add_remove_lock);
x86_cpu_to_apicid[cpu] = BAD_APICID;
cpu_clear(cpu, cpu_present_map);
- spin_unlock(&cpu_add_remove_lock);
+ spin_unlock(&cpu_add_remove_lock);
} else {
}
@@ -978,7 +975,6 @@ static int __devinit do_boot_cpu(int api
return boot_error;
}
-#ifdef CONFIG_HOTPLUG_CPU
static void idle_task_exit(void)
{
/* Give up lazy state borrowed by this idle vcpu */
@@ -1021,7 +1017,6 @@ exit:
exit:
return ret;
}
-#endif
/*
* Cycle through the processors sending APIC IPIs to boot each.
@@ -1120,8 +1115,8 @@ static void __init smp_boot_cpus(unsigne
kicked = 1;
- for_each_present_cpu ( cpu )
- {
+ for_each_present_cpu ( cpu )
+ {
apicid = x86_cpu_to_apicid[cpu];
/*
@@ -1130,11 +1125,11 @@ static void __init smp_boot_cpus(unsigne
if ((apicid == boot_cpu_apicid) || (apicid == BAD_APICID))
continue;
- if (!check_apicid_present(apicid))
- {
- dprintk(XENLOG_WARNING, "Present CPU has valid apicid\n");
+ if (!check_apicid_present(apicid)) {
+ dprintk(XENLOG_WARNING,
+ "Present CPU has valid apicid\n");
continue;
- }
+ }
if (max_cpus <= cpucount+1)
continue;
@@ -1233,7 +1228,6 @@ void __devinit smp_prepare_boot_cpu(void
per_cpu(cpu_state, smp_processor_id()) = CPU_ONLINE;
}
-#ifdef CONFIG_HOTPLUG_CPU
static void
remove_siblinginfo(int cpu)
{
@@ -1318,7 +1312,7 @@ void __cpu_die(unsigned int cpu)
static int take_cpu_down(void *unused)
{
- return __cpu_disable();
+ return __cpu_disable();
}
int cpu_down(unsigned int cpu)
@@ -1357,8 +1351,8 @@ int cpu_down(unsigned int cpu)
cpu_mcheck_distribute_cmci();
out:
- if (!err)
- send_guest_global_virq(dom0, VIRQ_PCPU_STATE);
+ if (!err)
+ send_guest_global_virq(dom0, VIRQ_PCPU_STATE);
spin_unlock(&cpu_add_remove_lock);
return err;
}
@@ -1379,8 +1373,8 @@ int cpu_up(unsigned int cpu)
goto out;
out:
- if (!err)
- send_guest_global_virq(dom0, VIRQ_PCPU_STATE);
+ if (!err)
+ send_guest_global_virq(dom0, VIRQ_PCPU_STATE);
spin_unlock(&cpu_add_remove_lock);
return err;
}
@@ -1436,99 +1430,72 @@ void enable_nonboot_cpus(void)
smpboot_restore_warm_reset_vector();
}
-int prefill_possible_map(void)
-{
- int i;
-
- for (i = 0; i < NR_CPUS; i++)
- cpu_set(i, cpu_possible_map);
- return 0;
-}
-
int cpu_add(uint32_t apic_id, uint32_t acpi_id, uint32_t pxm)
{
- int cpu = -1;
+ int cpu = -1;
#ifndef CONFIG_ACPI
- return -ENOSYS;
+ return -ENOSYS;
#endif
- dprintk(XENLOG_DEBUG, "cpu_add apic_id %x acpi_id %x pxm %x\n",
- apic_id, acpi_id, pxm);
-
- if ( acpi_id > MAX_MADT_ENTRIES || apic_id > MAX_APICS || pxm > 256 )
- return -EINVAL;
-
- /* Detect if the cpu has been added before */
- if ( x86_acpiid_to_apicid[acpi_id] != 0xff)
- {
- if (x86_acpiid_to_apicid[acpi_id] != apic_id)
- return -EINVAL;
- else
- return -EEXIST;
- }
-
- if ( physid_isset(apic_id, phys_cpu_present_map) )
- return -EEXIST;
+ dprintk(XENLOG_DEBUG, "cpu_add apic_id %x acpi_id %x pxm %x\n",
+ apic_id, acpi_id, pxm);
+
+ if ( acpi_id > MAX_MADT_ENTRIES || apic_id > MAX_APICS || pxm > 256 )
+ return -EINVAL;
+
+ /* Detect if the cpu has been added before */
+ if ( x86_acpiid_to_apicid[acpi_id] != 0xff)
+ {
+ if (x86_acpiid_to_apicid[acpi_id] != apic_id)
+ return -EINVAL;
+ else
+ return -EEXIST;
+ }
+
+ if ( physid_isset(apic_id, phys_cpu_present_map) )
+ return -EEXIST;
spin_lock(&cpu_add_remove_lock);
- cpu = mp_register_lapic(apic_id, 1);
-
- if (cpu < 0)
- {
- spin_unlock(&cpu_add_remove_lock);
- return cpu;
- }
-
- x86_acpiid_to_apicid[acpi_id] = apic_id;
-
- if ( !srat_disabled() )
- {
- int node;
-
- node = setup_node(pxm);
- if (node < 0)
- {
- dprintk(XENLOG_WARNING, "Setup node failed for pxm %x\n", pxm);
- x86_acpiid_to_apicid[acpi_id] = 0xff;
- mp_unregister_lapic(apic_id, cpu);
- spin_unlock(&cpu_add_remove_lock);
- return node;
- }
- apicid_to_node[apic_id] = node;
- }
-
- srat_detect_node(cpu);
- numa_add_cpu(cpu);
- spin_unlock(&cpu_add_remove_lock);
- dprintk(XENLOG_INFO, "Add CPU %x with index %x\n", apic_id, cpu);
- return cpu;
-}
-
-
-#else /* ... !CONFIG_HOTPLUG_CPU */
-int __cpu_disable(void)
-{
- return -ENOSYS;
-}
-
-void __cpu_die(unsigned int cpu)
-{
- /* We said "no" in __cpu_disable */
- BUG();
-}
-
-int cpu_add(uint32_t apic_id, uint32_t acpi_id, uint32_t pxm)
-{
- return -ENOSYS;
-}
-#endif /* CONFIG_HOTPLUG_CPU */
+ cpu = mp_register_lapic(apic_id, 1);
+
+ if (cpu < 0)
+ {
+ spin_unlock(&cpu_add_remove_lock);
+ return cpu;
+ }
+
+ x86_acpiid_to_apicid[acpi_id] = apic_id;
+
+ if ( !srat_disabled() )
+ {
+ int node;
+
+ node = setup_node(pxm);
+ if (node < 0)
+ {
+ dprintk(XENLOG_WARNING,
+ "Setup node failed for pxm %x\n", pxm);
+ x86_acpiid_to_apicid[acpi_id] = 0xff;
+ mp_unregister_lapic(apic_id, cpu);
+ spin_unlock(&cpu_add_remove_lock);
+ return node;
+ }
+ apicid_to_node[apic_id] = node;
+ }
+
+ srat_detect_node(cpu);
+ numa_add_cpu(cpu);
+ spin_unlock(&cpu_add_remove_lock);
+ dprintk(XENLOG_INFO, "Add CPU %x with index %x\n", apic_id, cpu);
+ return cpu;
+}
+
int __devinit __cpu_up(unsigned int cpu)
{
-#ifdef CONFIG_HOTPLUG_CPU
- int ret=0;
+ int ret = 0;
/*
* We do warm boot only on cpus that had booted earlier
@@ -1543,7 +1510,6 @@ int __devinit __cpu_up(unsigned int cpu)
if (ret)
return -EIO;
-#endif
/* In case one didn't come up */
if (!cpu_isset(cpu, cpu_callin_map)) {
@@ -1573,12 +1539,6 @@ void __init smp_cpus_done(unsigned int m
#endif
mtrr_save_state();
mtrr_aps_sync_end();
-#ifndef CONFIG_HOTPLUG_CPU
- /*
- * Disable executability of the SMP trampoline:
- */
- set_kernel_exec((unsigned long)trampoline_base, trampoline_exec);
-#endif
}
void __init smp_intr_init(void)
@@ -1598,14 +1558,14 @@ void __init smp_intr_init(void)
for (seridx = 0; seridx < 2; seridx++) {
if ((irq = serial_irq(seridx)) < 0)
continue;
- irq_vector[irq] = FIRST_HIPRIORITY_VECTOR + seridx + 1;
- per_cpu(vector_irq, cpu)[FIRST_HIPRIORITY_VECTOR + seridx + 1] = irq;
- irq_cfg[irq].vector = FIRST_HIPRIORITY_VECTOR + seridx + 1;
- irq_cfg[irq].domain = (cpumask_t)CPU_MASK_ALL;
- }
-
- /* IPI for cleanuping vectors after irq move */
- set_intr_gate(IRQ_MOVE_CLEANUP_VECTOR, irq_move_cleanup_interrupt);
+ irq_vector[irq] = FIRST_HIPRIORITY_VECTOR + seridx + 1;
+ per_cpu(vector_irq, cpu)[FIRST_HIPRIORITY_VECTOR + seridx + 1]
= irq;
+ irq_cfg[irq].vector = FIRST_HIPRIORITY_VECTOR + seridx + 1;
+ irq_cfg[irq].domain = (cpumask_t)CPU_MASK_ALL;
+ }
+
+ /* IPI for cleanuping vectors after irq move */
+ set_intr_gate(IRQ_MOVE_CLEANUP_VECTOR, irq_move_cleanup_interrupt);
/* IPI for event checking. */
set_intr_gate(EVENT_CHECK_VECTOR, event_check_interrupt);
diff -r 08a7d164db9a -r c983b21e75d2 xen/include/asm-x86/smp.h
--- a/xen/include/asm-x86/smp.h Thu Nov 12 11:43:21 2009 +0000
+++ b/xen/include/asm-x86/smp.h Thu Nov 12 11:59:18 2009 +0000
@@ -58,7 +58,6 @@ DECLARE_PER_CPU(int, cpu_state);
DECLARE_PER_CPU(int, cpu_state);
extern spinlock_t(cpu_add_remove_lock);
-#ifdef CONFIG_HOTPLUG_CPU
#define cpu_is_offline(cpu) unlikely(!cpu_online(cpu))
extern int cpu_down(unsigned int cpu);
extern int cpu_up(unsigned int cpu);
@@ -66,13 +65,7 @@ extern void cpu_uninit(void);
extern void cpu_uninit(void);
extern void disable_nonboot_cpus(void);
extern void enable_nonboot_cpus(void);
-int prefill_possible_map(void);
int cpu_add(uint32_t apic_id, uint32_t acpi_id, uint32_t pxm);
-#else
-static inline int cpu_is_offline(int cpu) {return 0;}
-static inline void disable_nonboot_cpus(void) {}
-static inline void enable_nonboot_cpus(void) {}
-#endif
/*
* This function is needed by all SMP systems. It must _always_ be valid
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