x64, x2apic/intr-remap: basic apic ops support

Introduce basic apic operations which handle the apic programming. This
will be used later to introduce another specific operations for x2apic.

For the perfomance critial accesses like IPI's, EOI etc, we use the
native operations as they are already referenced by different
indirections like genapic, irq_chip etc.

64bit Paravirt ops can also define their apic operations accordingly.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: akpm@linux-foundation.org
Cc: arjan@linux.intel.com
Cc: andi@firstfloor.org
Cc: ebiederm@xmission.com
Cc: jbarnes@virtuousgeek.org
Cc: steiner@sgi.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 5 insertions, 3 deletions

diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c
index e0f571d58c19..b80105a0f474 100644
--- a/arch/x86/kernel/paravirt.c
+++ b/arch/x86/kernel/paravirt.c
@@ -360,9 +360,11 @@ struct pv_cpu_ops pv_cpu_ops = {
 
 struct pv_apic_ops pv_apic_ops = {
 #ifdef CONFIG_X86_LOCAL_APIC
-        .apic_write = native_apic_write,
-        .apic_write_atomic = native_apic_write_atomic,
-        .apic_read = native_apic_read,
+#ifnded CONFIG_X86_64
+        .apic_write = native_apic_mem_write,
+        .apic_write_atomic = native_apic_mem_write_atomic,
+        .apic_read = native_apic_mem_read,
+#endif
         .setup_boot_clock = setup_boot_APIC_clock,
         .setup_secondary_clock = setup_secondary_APIC_clock,
         .startup_ipi_hook = paravirt_nop,