x86: add apic probe for genapic 64bit, v2
introducing an APIC handling probing abstraction:
static struct genapic *apic_probe[] __initdata = {
&apic_x2apic_uv_x,
&apic_x2apic_phys,
&apic_x2apic_cluster,
&apic_physflat,
NULL,
};
This way we can remove UV, x2apic specific code from genapic_64.c and
move them to their specific genapic files.
[ v2: fix compiling when CONFIG_ACPI is not set ]
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Jack Steiner <steiner@sgi.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/kernel/genx2apic_phys.c b/arch/x86/kernel/genx2apic_phys.c
index 2f3c6ca..f35a3bf 100644
--- a/arch/x86/kernel/genx2apic_phys.c
+++ b/arch/x86/kernel/genx2apic_phys.c
@@ -4,10 +4,30 @@
#include <linux/kernel.h>
#include <linux/ctype.h>
#include <linux/init.h>
+#include <linux/dmar.h>
+
#include <asm/smp.h>
#include <asm/ipi.h>
#include <asm/genapic.h>
+DEFINE_PER_CPU(int, x2apic_extra_bits);
+
+static int x2apic_phys;
+
+static int set_x2apic_phys_mode(char *arg)
+{
+ x2apic_phys = 1;
+ return 0;
+}
+early_param("x2apic_phys", set_x2apic_phys_mode);
+
+static int __init x2apic_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
+{
+ if (cpu_has_x2apic && intr_remapping_enabled && x2apic_phys)
+ return 1;
+
+ return 0;
+}
/* Start with all IRQs pointing to boot CPU. IRQ balancing will shift them. */
@@ -122,6 +142,7 @@
struct genapic apic_x2apic_phys = {
.name = "physical x2apic",
+ .acpi_madt_oem_check = x2apic_acpi_madt_oem_check,
.int_delivery_mode = dest_Fixed,
.int_dest_mode = (APIC_DEST_PHYSICAL != 0),
.target_cpus = x2apic_target_cpus,
