soc/intel/xeon_sp/spr: Fix ACPI errors on multi socket systems

Inject ACPI code for all generated ASL templates.
This fixes ACPI errors shown in linux when not all sockets
are currently plugged in or some have been disabled.

Test:
Boot Archer City with CONFIG_MAX_SOCKET=4

Change-Id: I9562a37a92c6140a5623db3c8fb5972e6a90aaa4
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/74183
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Johnny Lin <Johnny_Lin@wiwynn.com>

1 files changed, 24 insertions, 30 deletions

diff --git a/src/soc/intel/xeon_sp/spr/soc_acpi.c b/src/soc/intel/xeon_sp/spr/soc_acpi.c
index d9d82ac3aafa..619e5bb42399 100644
--- a/src/soc/intel/xeon_sp/spr/soc_acpi.c
+++ b/src/soc/intel/xeon_sp/spr/soc_acpi.c
@@ -86,7 +86,8 @@ void soc_fill_fadt(acpi_fadt_t *fadt)
 	fadt->x_gpe1_blk.addrh = 0x0;
 }
 
-static void create_dsdt_iou_pci_resource(uint8_t socket, uint8_t stack, const STACK_RES *ri)
+static void create_dsdt_iou_pci_resource(uint8_t socket, uint8_t stack, const STACK_RES *ri,
+					 bool stack_enabled)
 {
 	/*
 	   Stacks 0 (TYPE_UBOX_IIO)
@@ -105,16 +106,6 @@ static void create_dsdt_iou_pci_resource(uint8_t socket, uint8_t stack, const ST
 
 	acpigen_write_resourcetemplate_header();
 
-	/*
-	 * ACPI spec requires that each bus device (stack) has a valid
-	 * resource template. Disabled devices still need a valid _CRS
-	 * although the values are ignored. The FWTS sanity check does
-	 * not pass when using the HOB stack resources to generate the
-	 * _CRS resource template for disabled stacks, so we provide a
-	 * zeroed resource template to satisfy both the spec and FWTS.
-	 */
-	const bool stack_enabled = ri->Personality < TYPE_RESERVED;
-
 	/* Bus Resource */
 	if (stack_enabled) {
 		/* For stack with CXL device, the PCIe bus resource is BusBase only. */
@@ -178,7 +169,7 @@ static void create_dsdt_iou_pci_resource(uint8_t socket, uint8_t stack, const ST
 	acpigen_write_resourcetemplate_footer();
 }
 
-static void create_dsdt_iou_cxl_resource(uint8_t socket, uint8_t stack, const STACK_RES *ri)
+static void create_dsdt_iou_cxl_resource(uint8_t socket, uint8_t stack, const STACK_RES *ri, bool stack_enabled)
 {
 	/*
 	   Stacks 1 .. 5 (TYPE_UBOX_IIO)
@@ -194,7 +185,7 @@ static void create_dsdt_iou_cxl_resource(uint8_t socket, uint8_t stack, const ST
 
 	acpigen_write_resourcetemplate_header();
 
-	if (ri->Personality < TYPE_RESERVED) {
+	if (stack_enabled) {
 		/* bus resource, from (BusBase + 1) to BusLimit */
 		acpigen_resource_word(2, 0xc, 0, 0, ri->BusBase + 1, ri->BusLimit, 0x0,
 				      (ri->BusLimit - ri->BusBase));
@@ -229,7 +220,7 @@ static void create_dsdt_iou_cxl_resource(uint8_t socket, uint8_t stack, const ST
 	acpigen_write_resourcetemplate_footer();
 }
 
-static void create_dsdt_dino_resource(uint8_t socket, uint8_t stack, const STACK_RES *ri)
+static void create_dsdt_dino_resource(uint8_t socket, uint8_t stack, const STACK_RES *ri, bool stack_enabled)
 {
 	/*
 	   Stacks 8 .. B (TYPE_DINO)
@@ -298,7 +289,7 @@ static void create_dsdt_dino_resource(uint8_t socket, uint8_t stack, const STACK
 		acpigen_write_name(tres);
 		acpigen_write_resourcetemplate_header();
 
-		if (ri->Personality < TYPE_RESERVED) {
+		if (stack_enabled) {
 			acpigen_resource_word(2, 0xc, 0, 0, bus_base, bus_limit, 0x0,
 					      (bus_limit - bus_base + 1));
 
@@ -327,7 +318,7 @@ static void create_dsdt_dino_resource(uint8_t socket, uint8_t stack, const STACK
 	}
 }
 
-static void create_dsdt_ubox_resource(uint8_t socket, uint8_t stack, const STACK_RES *ri)
+static void create_dsdt_ubox_resource(uint8_t socket, uint8_t stack, const STACK_RES *ri, bool stack_enabled)
 {
 	/*
 	   Stacks D .. E (TYPE_UBOX)
@@ -348,7 +339,7 @@ static void create_dsdt_ubox_resource(uint8_t socket, uint8_t stack, const STACK
 		acpigen_write_name(tres);
 		acpigen_write_resourcetemplate_header();
 
-		if (ri->Personality >= TYPE_RESERVED)
+		if (!stack_enabled)
 			acpigen_resource_word(2, 0, 0, 0, 0, 0, 0, 0);
 		else if (i == 0)
 			acpigen_resource_word(2, 0xc, 0, 0, ri->BusBase, ri->BusBase, 0x0, 1);
@@ -365,12 +356,12 @@ static void create_dsdt_ubox_resource(uint8_t socket, uint8_t stack, const STACK
  * Add a DSDT ACPI Name field for STACK enable setting.
  *  This is retrieved by the device _STA defined in iiostack.asl
  */
-static void create_dsdt_stack_sta(uint8_t socket, uint8_t stack, const STACK_RES *ri)
+static void create_dsdt_stack_sta(uint8_t socket, uint8_t stack, const STACK_RES *ri, bool stack_enabled)
 {
 	char stack_sta[16];
 	snprintf(stack_sta, sizeof(stack_sta), "ST%d%X", socket, stack);
 
-	if (ri->Personality >= TYPE_RESERVED)
+	if (!stack_enabled)
 		acpigen_write_name_integer(stack_sta, ACPI_STATUS_DEVICE_ALL_OFF);
 	else
 		acpigen_write_name_integer(stack_sta, ACPI_STATUS_DEVICE_ALL_ON);
@@ -378,6 +369,8 @@ static void create_dsdt_stack_sta(uint8_t socket, uint8_t stack, const STACK_RES
 
 void uncore_inject_dsdt(const struct device *device)
 {
+	bool stack_enabled;
+
 	/* Only add RTxx entries once. */
 	if (device->bus->secondary != 0)
 		return;
@@ -402,27 +395,28 @@ void uncore_inject_dsdt(const struct device *device)
 
 	/* The _CSR generation must match SPR iiostack.asl. */
 	const IIO_UDS *hob = get_iio_uds();
-	/* TODO: DSDT uses CONFIG_MAX_SOCKET while PlatformData.numofIIO is the actual number
-	   of CPUs plugged in, although it doesn't cause serious errors when not all CPUs are
-	   plugged in, they should be in sync. */
-	for (uint8_t socket = 0; socket < hob->PlatformData.numofIIO; ++socket) {
+	/* Iterate over CONFIG_MAX_SOCKET to keep ASL templates and DSDT injection in sync */
+	for (uint8_t socket = 0; socket < CONFIG_MAX_SOCKET; ++socket) {
 		for (int stack = 0; stack < MAX_LOGIC_IIO_STACK; ++stack) {
 			const STACK_RES *ri =
 				&hob->PlatformData.IIO_resource[socket].StackRes[stack];
 
+			stack_enabled = hob->PlatformData.IIO_resource[socket].Valid &&
+					ri->Personality < TYPE_RESERVED;
+
 			printk(BIOS_DEBUG, "%s processing socket: %d, stack: %d, type: %d\n",
 			       __func__, socket, stack, ri->Personality);
 
 			if (stack <= IioStack5) { // TYPE_UBOX_IIO
-				create_dsdt_iou_pci_resource(socket, stack, ri);
-				create_dsdt_iou_cxl_resource(socket, stack, ri);
-				create_dsdt_stack_sta(socket, stack, ri);
+				create_dsdt_iou_pci_resource(socket, stack, ri, stack_enabled);
+				create_dsdt_iou_cxl_resource(socket, stack, ri, stack_enabled);
+				create_dsdt_stack_sta(socket, stack, ri, stack_enabled);
 			} else if (stack >= IioStack8 && stack <= IioStack11) { // TYPE_DINO
-				create_dsdt_dino_resource(socket, stack, ri);
-				create_dsdt_stack_sta(socket, stack, ri);
+				create_dsdt_dino_resource(socket, stack, ri, stack_enabled);
+				create_dsdt_stack_sta(socket, stack, ri, stack_enabled);
 			} else if (stack == IioStack13) { // TYPE_UBOX
-				create_dsdt_ubox_resource(socket, stack, ri);
-				create_dsdt_stack_sta(socket, stack, ri);
+				create_dsdt_ubox_resource(socket, stack, ri, stack_enabled);
+				create_dsdt_stack_sta(socket, stack, ri, stack_enabled);
 			}
 		}
 	}