ACPI: add support for x2APIC ACPI extensions

All logical processors with APIC ID values of 255 and greater will
have their APIC reported through Processor X2APIC structure (type-9
entry type) and all logical processors with APIC ID less than 255 will
have their APIC reported through legacy Processor Local APIC (type-0
entry type) only. This is the same case even for NMI structure
reporting.

The Processor X2APIC Affinity structure provides the association
between the X2APIC ID of a logical processor and the proximity domain
to which the logical processor belongs.

This patch adds 2 new subtables to MADT and one new subtable to SRAT.

This patch also changes x86_acpiid_to_apicid from u8 to u32 for x2APIC
ID, and changes mp_register_lapic to accept 32-bit id. But there are
still some 8-bit apic id hardcode and assumptions in Xen code, it
needs to be fixed in future.

Signed-off-by: Weidong Han <weidong.han@intel.com>

1 files changed, 22 insertions, 0 deletions

diff --git a/xen/include/xen/acpi.h b/xen/include/xen/acpi.h
index 43b81536bf..0df17ea0f2 100644
--- a/xen/include/xen/acpi.h
+++ b/xen/include/xen/acpi.h
@@ -57,6 +57,8 @@ enum acpi_madt_entry_id {
 	ACPI_MADT_IOSAPIC,
 	ACPI_MADT_LSAPIC,
 	ACPI_MADT_PLAT_INT_SRC,
+	ACPI_MADT_X2APIC,
+	ACPI_MADT_X2APIC_NMI,
 	ACPI_MADT_ENTRY_COUNT
 };
 
@@ -76,6 +78,17 @@ struct acpi_table_lapic {
 	}			flags;
 } __attribute__ ((packed));
 
+struct acpi_table_x2apic {
+	struct acpi_subtable_header header;
+	u16			reserved;
+	u32			id;
+	struct {
+		u32			enabled:1;
+		u32			reserved:31;
+	}			flags;
+	u32         acpi_uid;
+} __attribute__ ((packed));
+
 struct acpi_table_ioapic {
 	struct acpi_subtable_header	header;
 	u8			id;
@@ -105,6 +118,14 @@ struct acpi_table_lapic_nmi {
 	u8			lint;
 } __attribute__ ((packed));
 
+struct acpi_table_x2apic_nmi {
+	struct acpi_subtable_header header;
+	acpi_interrupt_flags	flags;
+	u32			acpi_uid;
+	u8			lint;
+	u8			reserved[3];
+} __attribute__ ((packed));
+
 struct acpi_table_lapic_addr_ovr {
 	struct acpi_subtable_header	header;
 	u8			reserved[2];
@@ -280,6 +301,7 @@ void acpi_table_print_srat_entry (struct acpi_subtable_header *srat);
 /* the following four functions are architecture-dependent */
 void acpi_numa_slit_init (struct acpi_table_slit *slit);
 void acpi_numa_processor_affinity_init (struct acpi_srat_cpu_affinity *pa);
+void acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa);
 void acpi_numa_memory_affinity_init (struct acpi_srat_mem_affinity *ma);
 void acpi_numa_arch_fixup(void);