summaryrefslogtreecommitdiffstats
path: root/arch/x86/kernel/genapic_64.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86/kernel/genapic_64.c')
-rw-r--r--arch/x86/kernel/genapic_64.c88
1 files changed, 32 insertions, 56 deletions
diff --git a/arch/x86/kernel/genapic_64.c b/arch/x86/kernel/genapic_64.c
index eaff0bbb1444..6c9bfc9e1e95 100644
--- a/arch/x86/kernel/genapic_64.c
+++ b/arch/x86/kernel/genapic_64.c
@@ -16,87 +16,63 @@
#include <linux/ctype.h>
#include <linux/init.h>
#include <linux/hardirq.h>
+#include <linux/dmar.h>
#include <asm/smp.h>
#include <asm/ipi.h>
#include <asm/genapic.h>
-#ifdef CONFIG_ACPI
-#include <acpi/acpi_bus.h>
-#endif
-
-DEFINE_PER_CPU(int, x2apic_extra_bits);
+extern struct genapic apic_flat;
+extern struct genapic apic_physflat;
+extern struct genapic apic_x2xpic_uv_x;
+extern struct genapic apic_x2apic_phys;
+extern struct genapic apic_x2apic_cluster;
struct genapic __read_mostly *genapic = &apic_flat;
-static enum uv_system_type uv_system_type;
+static struct genapic *apic_probe[] __initdata = {
+ &apic_x2apic_uv_x,
+ &apic_x2apic_phys,
+ &apic_x2apic_cluster,
+ &apic_physflat,
+ NULL,
+};
/*
* Check the APIC IDs in bios_cpu_apicid and choose the APIC mode.
*/
void __init setup_apic_routing(void)
{
- if (uv_system_type == UV_NON_UNIQUE_APIC)
- genapic = &apic_x2apic_uv_x;
- else
-#ifdef CONFIG_ACPI
- /*
- * Quirk: some x86_64 machines can only use physical APIC mode
- * regardless of how many processors are present (x86_64 ES7000
- * is an example).
- */
- if (acpi_gbl_FADT.header.revision > FADT2_REVISION_ID &&
- (acpi_gbl_FADT.flags & ACPI_FADT_APIC_PHYSICAL))
- genapic = &apic_physflat;
- else
-#endif
-
- if (max_physical_apicid < 8)
- genapic = &apic_flat;
- else
- genapic = &apic_physflat;
+ if (genapic == &apic_x2apic_phys || genapic == &apic_x2apic_cluster) {
+ if (!intr_remapping_enabled)
+ genapic = &apic_flat;
+ }
- printk(KERN_INFO "Setting APIC routing to %s\n", genapic->name);
+ if (genapic == &apic_flat) {
+ if (max_physical_apicid >= 8)
+ genapic = &apic_physflat;
+ printk(KERN_INFO "Setting APIC routing to %s\n", genapic->name);
+ }
}
/* Same for both flat and physical. */
-void send_IPI_self(int vector)
+void apic_send_IPI_self(int vector)
{
__send_IPI_shortcut(APIC_DEST_SELF, vector, APIC_DEST_PHYSICAL);
}
int __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
{
- if (!strcmp(oem_id, "SGI")) {
- if (!strcmp(oem_table_id, "UVL"))
- uv_system_type = UV_LEGACY_APIC;
- else if (!strcmp(oem_table_id, "UVX"))
- uv_system_type = UV_X2APIC;
- else if (!strcmp(oem_table_id, "UVH"))
- uv_system_type = UV_NON_UNIQUE_APIC;
+ int i;
+
+ for (i = 0; apic_probe[i]; ++i) {
+ if (apic_probe[i]->acpi_madt_oem_check(oem_id, oem_table_id)) {
+ genapic = apic_probe[i];
+ printk(KERN_INFO "Setting APIC routing to %s.\n",
+ genapic->name);
+ return 1;
+ }
}
return 0;
}
-
-unsigned int read_apic_id(void)
-{
- unsigned int id;
-
- WARN_ON(preemptible() && num_online_cpus() > 1);
- id = apic_read(APIC_ID);
- if (uv_system_type >= UV_X2APIC)
- id |= __get_cpu_var(x2apic_extra_bits);
- return id;
-}
-
-enum uv_system_type get_uv_system_type(void)
-{
- return uv_system_type;
-}
-
-int is_uv_system(void)
-{
- return uv_system_type != UV_NONE;
-}
-EXPORT_SYMBOL_GPL(is_uv_system);