[S] Change in coreboot[master]: acpi: Add SRAT x2APIC table support

[Patrick Rudolph (Code Review)]

Attention is currently required from: Lance Zhao, Tim Wawrzynczak.

Patrick Rudolph has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/73365 )

Change subject: acpi: Add SRAT x2APIC table support
......................................................................

acpi: Add SRAT x2APIC table support

For platforms using X2APIC mode add SRAT x2APIC table
generation. This allows to setup proper SRAT tables.

Change-Id: If78c423884b7ce9330f0f46998ac83da334ee26d
Signed-off-by: Naresh Solanki 
---
M src/acpi/acpi.c
M src/include/acpi/acpi.h
2 files changed, 39 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/65/73365/1

diff --git a/src/acpi/acpi.c b/src/acpi/acpi.c
index 04a59b1..2706bf7 100644
--- a/src/acpi/acpi.c
+++ b/src/acpi/acpi.c
@@ -531,6 +531,19 @@
    return lapic->length;
 }

+int acpi_create_srat_x2apic(acpi_srat_x2apic_t *x2apic, u32 node, u32 apic)
+{
+	memset((void *)x2apic, 0, sizeof(acpi_srat_x2apic_t));
+
+	x2apic->type = 2; /* Processor x2APIC structure */
+	x2apic->length = sizeof(acpi_srat_x2apic_t);
+	x2apic->flags = (1 << 0); /* Enabled (the use of this structure). */
+	x2apic->proximity_domain = node;
+	x2apic->x2apic_id = apic;
+
+	return x2apic->length;
+}
+
 int acpi_create_srat_mem(acpi_srat_mem_t *mem, u8 node, u32 basek, u32 sizek,
    			u32 flags)
 {
diff --git a/src/include/acpi/acpi.h b/src/include/acpi/acpi.h
index b92c77e..a108d6a 100644
--- a/src/include/acpi/acpi.h
+++ b/src/include/acpi/acpi.h
@@ -353,6 +353,18 @@
 #define ACPI_SRAT_STRUCTURE_MEM   1
 #define ACPI_SRAT_STRUCTURE_GIA   5

+/* SRAT: Processor x2APIC Structure */
+typedef struct acpi_srat_x2apic {
+	u8 type;			/* Type (0) */
+	u8 length;			/* Length in bytes (16) */
+	u16 reserved;			/* Reserved - Must be zero */
+	u32 proximity_domain;		/* Proximity domain */
+	u32 x2apic_id;			/* x2APIC ID */
+	u32 flags;			/* Enable bit 0 = 1, other bits reserved to 0 */
+	u32 clock_domain;		/* _CDM Clock Domain */
+	u32 reserved1;			/* Reserved */
+} __packed acpi_srat_x2apic_t;
+
 /* SRAT: Processor Local APIC/SAPIC Affinity Structure */
 typedef struct acpi_srat_lapic {
    u8 type;			/* Type (0) */
@@ -1337,6 +1349,7 @@
 int acpi_create_madt_lx2apic_nmi(acpi_madt_lx2apic_nmi_t *lapic_nmi, u32 cpu,
    			 u16 flags, u8 lint);
 int acpi_create_srat_lapic(acpi_srat_lapic_t *lapic, u8 node, u8 apic);
+int acpi_create_srat_x2apic(acpi_srat_x2apic_t *x2apic, u32 node, u32 apic);
 int acpi_create_srat_mem(acpi_srat_mem_t *mem, u8 node, u32 basek, u32 sizek,
    		 u32 flags);
 /*