Merge branch 'aosp/upstream-master' into HEAD am: faa476c0caHEADandroid-s-beta-5android-s-beta-4android-s-beta-3android-s-beta-2android-s-beta-1mastermain-cg-testing-releaseandroid-s-beta-5android-s-beta-4

Original change: https://android-review.googlesource.com/c/platform/external/arm-trusted-firmware/+/1589611

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I3a25534ceed4f8e188510641080d8b8ed49b8f62

1 files changed, 36 insertions, 10 deletions

diff --git a/plat/arm/board/fvp/fvp_topology.c b/plat/arm/board/fvp/fvp_topology.c
index 24e79b4d4..80cfbd5ce 100644
--- a/plat/arm/board/fvp/fvp_topology.c
+++ b/plat/arm/board/fvp/fvp_topology.c
@@ -1,18 +1,21 @@
 /*
- * Copyright (c) 2013-2019, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2013-2020, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#include <platform_def.h>
+#include <assert.h>
 
 #include <arch.h>
 #include <drivers/arm/fvp/fvp_pwrc.h>
+#include <fconf_hw_config_getter.h>
 #include <lib/cassert.h>
 #include <plat/arm/common/arm_config.h>
 #include <plat/arm/common/plat_arm.h>
 #include <plat/common/platform.h>
 
+#include <platform_def.h>
+
 /* The FVP power domain tree descriptor */
 static unsigned char fvp_power_domain_tree_desc[FVP_CLUSTER_COUNT + 2];
 
@@ -21,24 +24,47 @@ CASSERT(((FVP_CLUSTER_COUNT > 0) && (FVP_CLUSTER_COUNT <= 256)),
 			assert_invalid_fvp_cluster_count);
 
 /*******************************************************************************
- * This function dynamically constructs the topology according to
- * FVP_CLUSTER_COUNT and returns it.
+ * This function dynamically constructs the topology according to cpu-map node
+ * in HW_CONFIG dtb and returns it.
  ******************************************************************************/
 const unsigned char *plat_get_power_domain_tree_desc(void)
 {
-	int i;
+	unsigned int i;
+	uint32_t cluster_count, cpus_per_cluster;
+
+	/*
+	 * fconf APIs are not supported for RESET_TO_SP_MIN, RESET_TO_BL31 and
+	 * BL2_AT_EL3 systems.
+	 */
+#if RESET_TO_SP_MIN || RESET_TO_BL31 || BL2_AT_EL3
+	cluster_count = FVP_CLUSTER_COUNT;
+	cpus_per_cluster = FVP_MAX_CPUS_PER_CLUSTER * FVP_MAX_PE_PER_CPU;
+#else
+	cluster_count = FCONF_GET_PROPERTY(hw_config, topology, plat_cluster_count);
+	cpus_per_cluster = FCONF_GET_PROPERTY(hw_config, topology, cluster_cpu_count);
+	/* Several FVP Models use the same blanket dts. Ex: FVP_Base_Cortex-A65x4
+	 * and FVP_Base_Cortex-A65AEx8 both use same dts but have different number of
+	 * CPUs in the cluster, as reflected by build flags FVP_MAX_CPUS_PER_CLUSTER.
+	 * Take the minimum of two to ensure PSCI functions do not exceed the size of
+	 * the PSCI data structures allocated at build time.
+	 */
+	cpus_per_cluster = MIN(cpus_per_cluster,
+			(uint32_t)(FVP_MAX_CPUS_PER_CLUSTER * FVP_MAX_PE_PER_CPU));
+
+#endif
+
+	assert(cluster_count > 0U);
+	assert(cpus_per_cluster > 0U);
 
 	/*
 	 * The highest level is the system level. The next level is constituted
 	 * by clusters and then cores in clusters.
 	 */
 	fvp_power_domain_tree_desc[0] = 1;
-	fvp_power_domain_tree_desc[1] = FVP_CLUSTER_COUNT;
-
-	for (i = 0; i < FVP_CLUSTER_COUNT; i++)
-		fvp_power_domain_tree_desc[i + 2] =
-			FVP_MAX_CPUS_PER_CLUSTER * FVP_MAX_PE_PER_CPU;
+	fvp_power_domain_tree_desc[1] = (unsigned char)cluster_count;
 
+	for (i = 0; i < cluster_count; i++)
+		fvp_power_domain_tree_desc[i + 2] = (unsigned char)cpus_per_cluster;
 
 	return fvp_power_domain_tree_desc;
 }