xen: compile irq functions without -pg for ftrace

For some reason I managed to miss a bunch of irq-related functions
which also need to be compiled without -pg when using ftrace.  This
patch moves them into their own file, and starts a cleanup process
I've been meaning to do anyway.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: "Alex Nixon (Intern)" <Alex.Nixon@eu.citrix.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 2 insertions, 120 deletions

diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index b795470ec069..cf8b3a93122b 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -30,7 +30,6 @@
 #include <xen/interface/xen.h>
 #include <xen/interface/physdev.h>
 #include <xen/interface/vcpu.h>
-#include <xen/interface/sched.h>
 #include <xen/features.h>
 #include <xen/page.h>
 #include <xen/hvc-console.h>
@@ -226,94 +225,6 @@ static unsigned long xen_get_debugreg(int reg)
         return HYPERVISOR_get_debugreg(reg);
 }
 
-static unsigned long xen_save_fl(void)
-{
-        struct vcpu_info *vcpu;
-        unsigned long flags;
-
-        vcpu = x86_read_percpu(xen_vcpu);
-
-        /* flag has opposite sense of mask */
-        flags = !vcpu->evtchn_upcall_mask;
-
-        /* convert to IF type flag
-           -0 -> 0x00000000
-           -1 -> 0xffffffff
-        */
-        return (-flags) & X86_EFLAGS_IF;
-}
-
-static void xen_restore_fl(unsigned long flags)
-{
-        struct vcpu_info *vcpu;
-
-        /* convert from IF type flag */
-        flags = !(flags & X86_EFLAGS_IF);
-
-        /* There's a one instruction preempt window here.  We need to
-           make sure we're don't switch CPUs between getting the vcpu
-           pointer and updating the mask. */
-        preempt_disable();
-        vcpu = x86_read_percpu(xen_vcpu);
-        vcpu->evtchn_upcall_mask = flags;
-        preempt_enable_no_resched();
-
-        /* Doesn't matter if we get preempted here, because any
-           pending event will get dealt with anyway. */
-
-        if (flags == 0) {
-                preempt_check_resched();
-                barrier(); /* unmask then check (avoid races) */
-                if (unlikely(vcpu->evtchn_upcall_pending))
-                        force_evtchn_callback();
-        }
-}
-
-static void xen_irq_disable(void)
-{
-        /* There's a one instruction preempt window here.  We need to
-           make sure we're don't switch CPUs between getting the vcpu
-           pointer and updating the mask. */
-        preempt_disable();
-        x86_read_percpu(xen_vcpu)->evtchn_upcall_mask = 1;
-        preempt_enable_no_resched();
-}
-
-static void xen_irq_enable(void)
-{
-        struct vcpu_info *vcpu;
-
-        /* We don't need to worry about being preempted here, since
-           either a) interrupts are disabled, so no preemption, or b)
-           the caller is confused and is trying to re-enable interrupts
-           on an indeterminate processor. */
-
-        vcpu = x86_read_percpu(xen_vcpu);
-        vcpu->evtchn_upcall_mask = 0;
-
-        /* Doesn't matter if we get preempted here, because any
-           pending event will get dealt with anyway. */
-
-        barrier(); /* unmask then check (avoid races) */
-        if (unlikely(vcpu->evtchn_upcall_pending))
-                force_evtchn_callback();
-}
-
-static void xen_safe_halt(void)
-{
-        /* Blocking includes an implicit local_irq_enable(). */
-        if (HYPERVISOR_sched_op(SCHEDOP_block, NULL) != 0)
-                BUG();
-}
-
-static void xen_halt(void)
-{
-        if (irqs_disabled())
-                HYPERVISOR_vcpu_op(VCPUOP_down, smp_processor_id(), NULL);
-        else
-                xen_safe_halt();
-}
-
 static void xen_leave_lazy(void)
 {
         paravirt_leave_lazy(paravirt_get_lazy_mode());
@@ -1308,36 +1219,6 @@ static const struct pv_cpu_ops xen_cpu_ops __initdata = {
         },
 };
 
-static void __init __xen_init_IRQ(void)
-{
-#ifdef CONFIG_X86_64
-        int i;
-
-        /* Create identity vector->irq map */
-        for(i = 0; i < NR_VECTORS; i++) {
-                int cpu;
-
-                for_each_possible_cpu(cpu)
-                        per_cpu(vector_irq, cpu)[i] = i;
-        }
-#endif  /* CONFIG_X86_64 */
-
-        xen_init_IRQ();
-}
-
-static const struct pv_irq_ops xen_irq_ops __initdata = {
-        .init_IRQ = __xen_init_IRQ,
-        .save_fl = xen_save_fl,
-        .restore_fl = xen_restore_fl,
-        .irq_disable = xen_irq_disable,
-        .irq_enable = xen_irq_enable,
-        .safe_halt = xen_safe_halt,
-        .halt = xen_halt,
-#ifdef CONFIG_X86_64
-        .adjust_exception_frame = xen_adjust_exception_frame,
-#endif
-};
-
 static const struct pv_apic_ops xen_apic_ops __initdata = {
 #ifdef CONFIG_X86_LOCAL_APIC
         .apic_write = xen_apic_write,
@@ -1740,10 +1621,11 @@ asmlinkage void __init xen_start_kernel(void)
         pv_init_ops = xen_init_ops;
         pv_time_ops = xen_time_ops;
         pv_cpu_ops = xen_cpu_ops;
-        pv_irq_ops = xen_irq_ops;
         pv_apic_ops = xen_apic_ops;
         pv_mmu_ops = xen_mmu_ops;
 
+        xen_init_irq_ops();
+
         if (xen_feature(XENFEAT_mmu_pt_update_preserve_ad)) {
                 pv_mmu_ops.ptep_modify_prot_start = xen_ptep_modify_prot_start;
                 pv_mmu_ops.ptep_modify_prot_commit = xen_ptep_modify_prot_commit;