x2apic: xen64 paravirt basic apic ops

Define the Xen specific basic apic ops, in additon to paravirt apic ops,
with some misc warning fixes.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: akpm@linux-foundation.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 39 insertions, 2 deletions

diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index dcd4e51f2f16..54e255667530 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -548,16 +548,45 @@ static void xen_io_delay(void)
 }
 
 #ifdef CONFIG_X86_LOCAL_APIC
-static u32 xen_apic_read(unsigned long reg)
+static u32 xen_apic_read(u32 reg)
 {
         return 0;
 }
 
-static void xen_apic_write(unsigned long reg, u32 val)
+static void xen_apic_write(u32 reg, u32 val)
 {
         /* Warn to see if there's any stray references */
         WARN_ON(1);
 }
+
+#ifdef CONFIG_X86_64
+static u64 xen_apic_icr_read(void)
+{
+        return 0;
+}
+
+static void xen_apic_icr_write(u32 low, u32 id)
+{
+        /* Warn to see if there's any stray references */
+        WARN_ON(1);
+}
+
+static void xen_apic_wait_icr_idle(void)
+{
+        return;
+}
+
+static struct apic_ops xen_basic_apic_ops = {
+        .read = xen_apic_read,
+        .write = xen_apic_write,
+        .write_atomic = xen_apic_write,
+        .icr_read = xen_apic_icr_read,
+        .icr_write = xen_apic_icr_write,
+        .wait_icr_idle = xen_apic_wait_icr_idle,
+        .safe_wait_icr_idle = xen_apic_wait_icr_idle,
+};
+#endif
+
 #endif
 
 static void xen_flush_tlb(void)
@@ -1130,9 +1159,11 @@ static const struct pv_irq_ops xen_irq_ops __initdata = {
 
 static const struct pv_apic_ops xen_apic_ops __initdata = {
 #ifdef CONFIG_X86_LOCAL_APIC
+#ifndef CONFIG_X86_64
         .apic_write = xen_apic_write,
         .apic_write_atomic = xen_apic_write,
         .apic_read = xen_apic_read,
+#endif
         .setup_boot_clock = paravirt_nop,
         .setup_secondary_clock = paravirt_nop,
         .startup_ipi_hook = paravirt_nop,
@@ -1291,6 +1322,12 @@ asmlinkage void __init xen_start_kernel(void)
         pv_irq_ops = xen_irq_ops;
         pv_apic_ops = xen_apic_ops;
         pv_mmu_ops = xen_mmu_ops;
+#ifdef CONFIG_X86_64
+        /*
+         * for 64bit, set up the basic apic ops aswell.
+         */
+        apic_ops = &xen_basic_apic_ops;
+#endif
 
         if (xen_feature(XENFEAT_mmu_pt_update_preserve_ad)) {
                 pv_mmu_ops.ptep_modify_prot_start = xen_ptep_modify_prot_start;