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Date: Tue, 08 Jul 2008 15:06:43 -0700
From: Jeremy Fitzhardinge <jeremy@...p.org>
To: Ingo Molnar <mingo@...e.hu>
Cc: LKML <linux-kernel@...r.kernel.org>, x86@...nel.org,
Stephen Tweedie <sct@...hat.com>,
Eduardo Habkost <ehabkost@...hat.com>,
Mark McLoughlin <markmc@...hat.com>, x86@...nel.org
Subject: [PATCH 21 of 55] xen64: smp.c compile hacking
A number of random changes to make xen/smp.c compile in 64-bit mode.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>a
---
arch/x86/xen/setup.c | 7 ---
arch/x86/xen/smp.c | 98 +++++++++++++++++++++++++++---------------------
arch/x86/xen/xen-ops.h | 2
3 files changed, 58 insertions(+), 49 deletions(-)
diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -98,7 +98,7 @@
/* Mask events on entry, even though they get enabled immediately */
static struct callback_register sysenter = {
.type = CALLBACKTYPE_sysenter,
- .address = { __KERNEL_CS, (unsigned long)xen_sysenter_target },
+ .address = XEN_CALLBACK(__KERNEL_CS, xen_sysenter_target),
.flags = CALLBACKF_mask_events,
};
@@ -143,11 +143,6 @@
pm_idle = xen_idle;
-#ifdef CONFIG_SMP
- /* fill cpus_possible with all available cpus */
- xen_fill_possible_map();
-#endif
-
paravirt_disable_iospace();
fiddle_vdso();
diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -66,12 +66,20 @@
int cpu = smp_processor_id();
cpu_init();
+ preempt_disable();
+
xen_enable_sysenter();
- preempt_disable();
- per_cpu(cpu_state, cpu) = CPU_ONLINE;
+ cpu = smp_processor_id();
+ smp_store_cpu_info(cpu);
+ cpu_data(cpu).x86_max_cores = 1;
+ set_cpu_sibling_map(cpu);
xen_setup_cpu_clockevents();
+
+ cpu_set(cpu, cpu_online_map);
+ x86_write_percpu(cpu_state, CPU_ONLINE);
+ wmb();
/* We can take interrupts now: we're officially "up". */
local_irq_enable();
@@ -141,7 +149,7 @@
return rc;
}
-void __init xen_fill_possible_map(void)
+static void __init xen_fill_possible_map(void)
{
int i, rc;
@@ -154,24 +162,12 @@
static void __init xen_smp_prepare_boot_cpu(void)
{
- int cpu;
-
BUG_ON(smp_processor_id() != 0);
native_smp_prepare_boot_cpu();
/* We've switched to the "real" per-cpu gdt, so make sure the
old memory can be recycled */
- make_lowmem_page_readwrite(&per_cpu__gdt_page);
-
- for_each_possible_cpu(cpu) {
- cpus_clear(per_cpu(cpu_sibling_map, cpu));
- /*
- * cpu_core_map lives in a per cpu area that is cleared
- * when the per cpu array is allocated.
- *
- * cpus_clear(per_cpu(cpu_core_map, cpu));
- */
- }
+ make_lowmem_page_readwrite(&per_cpu_var(gdt_page));
xen_setup_vcpu_info_placement();
}
@@ -180,17 +176,8 @@
{
unsigned cpu;
- for_each_possible_cpu(cpu) {
- cpus_clear(per_cpu(cpu_sibling_map, cpu));
- /*
- * cpu_core_ map will be zeroed when the per
- * cpu area is allocated.
- *
- * cpus_clear(per_cpu(cpu_core_map, cpu));
- */
- }
-
smp_store_cpu_info(0);
+ cpu_data(0).x86_max_cores = 1;
set_cpu_sibling_map(0);
if (xen_smp_intr_init(0))
@@ -225,7 +212,7 @@
cpu_initialize_context(unsigned int cpu, struct task_struct *idle)
{
struct vcpu_guest_context *ctxt;
- struct gdt_page *gdt = &per_cpu(gdt_page, cpu);
+ struct desc_struct *gdt;
if (cpu_test_and_set(cpu, xen_cpu_initialized_map))
return 0;
@@ -234,12 +221,15 @@
if (ctxt == NULL)
return -ENOMEM;
+ gdt = get_cpu_gdt_table(cpu);
+
ctxt->flags = VGCF_IN_KERNEL;
ctxt->user_regs.ds = __USER_DS;
ctxt->user_regs.es = __USER_DS;
+ ctxt->user_regs.ss = __KERNEL_DS;
+#ifdef CONFIG_X86_32
ctxt->user_regs.fs = __KERNEL_PERCPU;
- ctxt->user_regs.gs = 0;
- ctxt->user_regs.ss = __KERNEL_DS;
+#endif
ctxt->user_regs.eip = (unsigned long)cpu_bringup_and_idle;
ctxt->user_regs.eflags = 0x1000; /* IOPL_RING1 */
@@ -249,11 +239,11 @@
ctxt->ldt_ents = 0;
- BUG_ON((unsigned long)gdt->gdt & ~PAGE_MASK);
- make_lowmem_page_readonly(gdt->gdt);
+ BUG_ON((unsigned long)gdt & ~PAGE_MASK);
+ make_lowmem_page_readonly(gdt);
- ctxt->gdt_frames[0] = virt_to_mfn(gdt->gdt);
- ctxt->gdt_ents = ARRAY_SIZE(gdt->gdt);
+ ctxt->gdt_frames[0] = virt_to_mfn(gdt);
+ ctxt->gdt_ents = GDT_ENTRIES;
ctxt->user_regs.cs = __KERNEL_CS;
ctxt->user_regs.esp = idle->thread.sp0 - sizeof(struct pt_regs);
@@ -261,9 +251,11 @@
ctxt->kernel_ss = __KERNEL_DS;
ctxt->kernel_sp = idle->thread.sp0;
+#ifdef CONFIG_X86_32
ctxt->event_callback_cs = __KERNEL_CS;
+ ctxt->failsafe_callback_cs = __KERNEL_CS;
+#endif
ctxt->event_callback_eip = (unsigned long)xen_hypervisor_callback;
- ctxt->failsafe_callback_cs = __KERNEL_CS;
ctxt->failsafe_callback_eip = (unsigned long)xen_failsafe_callback;
per_cpu(xen_cr3, cpu) = __pa(swapper_pg_dir);
@@ -287,10 +279,27 @@
return rc;
#endif
+#ifdef CONFIG_X86_64
+ /* Allocate node local memory for AP pdas */
+ WARN_ON(cpu == 0);
+ if (cpu > 0) {
+ rc = get_local_pda(cpu);
+ if (rc)
+ return rc;
+ }
+#endif
+
+#ifdef CONFIG_X86_32
init_gdt(cpu);
per_cpu(current_task, cpu) = idle;
irq_ctx_init(cpu);
+#else
+ cpu_pda(cpu)->pcurrent = idle;
+ clear_tsk_thread_flag(idle, TIF_FORK);
+#endif
xen_setup_timer(cpu);
+
+ per_cpu(cpu_state, cpu) = CPU_UP_PREPARE;
/* make sure interrupts start blocked */
per_cpu(xen_vcpu, cpu)->evtchn_upcall_mask = 1;
@@ -306,15 +315,13 @@
if (rc)
return rc;
- smp_store_cpu_info(cpu);
- set_cpu_sibling_map(cpu);
- /* This must be done before setting cpu_online_map */
- wmb();
-
- cpu_set(cpu, cpu_online_map);
-
rc = HYPERVISOR_vcpu_op(VCPUOP_up, cpu, NULL);
BUG_ON(rc);
+
+ while(per_cpu(cpu_state, cpu) != CPU_ONLINE) {
+ HYPERVISOR_sched_op(SCHEDOP_yield, 0);
+ barrier();
+ }
return 0;
}
@@ -379,7 +386,11 @@
{
irq_enter();
generic_smp_call_function_interrupt();
+#ifdef CONFIG_X86_32
__get_cpu_var(irq_stat).irq_call_count++;
+#else
+ add_pda(irq_call_count, 1);
+#endif
irq_exit();
return IRQ_HANDLED;
@@ -389,7 +400,11 @@
{
irq_enter();
generic_smp_call_function_single_interrupt();
+#ifdef CONFIG_X86_32
__get_cpu_var(irq_stat).irq_call_count++;
+#else
+ add_pda(irq_call_count, 1);
+#endif
irq_exit();
return IRQ_HANDLED;
@@ -411,4 +426,5 @@
void __init xen_smp_init(void)
{
smp_ops = xen_smp_ops;
+ xen_fill_possible_map();
}
diff --git a/arch/x86/xen/xen-ops.h b/arch/x86/xen/xen-ops.h
--- a/arch/x86/xen/xen-ops.h
+++ b/arch/x86/xen/xen-ops.h
@@ -44,8 +44,6 @@
void xen_mark_init_mm_pinned(void);
-void __init xen_fill_possible_map(void);
-
void __init xen_setup_vcpu_info_placement(void);
#ifdef CONFIG_SMP
--
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