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@citrix.com>a
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

3 files changed, 58 insertions, 49 deletions

diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index e0a39595bde3..f52f3855fb6b 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -98,7 +98,7 @@ void xen_enable_sysenter(void)
         /* 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 @@ void __init xen_arch_setup(void)
 
         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
index 91fae8ff756e..800bb2191e2a 100644
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -66,13 +66,21 @@ static __cpuinit void cpu_bringup_and_idle(void)
         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 @@ static int xen_smp_intr_init(unsigned int cpu)
         return rc;
 }
 
-void __init xen_fill_possible_map(void)
+static void __init xen_fill_possible_map(void)
 {
         int i, rc;
 
@@ -154,24 +162,12 @@ void __init xen_fill_possible_map(void)
 
 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 @@ static void __init xen_smp_prepare_cpus(unsigned int max_cpus)
 {
         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 @@ static __cpuinit int
 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 @@ cpu_initialize_context(unsigned int cpu, struct task_struct *idle)
         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.fs = __KERNEL_PERCPU;
-        ctxt->user_regs.gs = 0;
         ctxt->user_regs.ss = __KERNEL_DS;
+#ifdef CONFIG_X86_32
+        ctxt->user_regs.fs = __KERNEL_PERCPU;
+#endif
         ctxt->user_regs.eip = (unsigned long)cpu_bringup_and_idle;
         ctxt->user_regs.eflags = 0x1000; /* IOPL_RING1 */
 
@@ -249,11 +239,11 @@ cpu_initialize_context(unsigned int cpu, struct task_struct *idle)
 
         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 @@ cpu_initialize_context(unsigned int cpu, struct task_struct *idle)
         ctxt->kernel_ss = __KERNEL_DS;
         ctxt->kernel_sp = idle->thread.sp0;
 
+#ifdef CONFIG_X86_32
         ctxt->event_callback_cs     = __KERNEL_CS;
-        ctxt->event_callback_eip    = (unsigned long)xen_hypervisor_callback;
         ctxt->failsafe_callback_cs  = __KERNEL_CS;
+#endif
+        ctxt->event_callback_eip    = (unsigned long)xen_hypervisor_callback;
         ctxt->failsafe_callback_eip = (unsigned long)xen_failsafe_callback;
 
         per_cpu(xen_cr3, cpu) = __pa(swapper_pg_dir);
@@ -287,11 +279,28 @@ static int __cpuinit xen_cpu_up(unsigned int cpu)
                 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;
 
@@ -306,16 +315,14 @@ static int __cpuinit xen_cpu_up(unsigned int cpu)
         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 @@ static irqreturn_t xen_call_function_interrupt(int irq, void *dev_id)
 {
         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 @@ static irqreturn_t xen_call_function_single_interrupt(int irq, void *dev_id)
 {
         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 @@ static const struct smp_ops xen_smp_ops __initdata = {
 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
index 81a779fc9b26..aca4a7803e2c 100644
--- a/arch/x86/xen/xen-ops.h
+++ b/arch/x86/xen/xen-ops.h
@@ -44,8 +44,6 @@ bool xen_vcpu_stolen(int vcpu);
 
 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