diff --git a/src/soc/amd/cezanne/Kconfig b/src/soc/amd/cezanne/Kconfig
index d3a28413a8..91129e921d 100644
--- a/src/soc/amd/cezanne/Kconfig
+++ b/src/soc/amd/cezanne/Kconfig
@@ -106,6 +106,10 @@ config PSP_APOB_DRAM_ADDRESS
 	  Location in DRAM where the PSP will copy the AGESA PSP Output
 	  Block.
 
+config PSP_APOB_DRAM_SIZE
+	hex
+	default 0x10000
+
 config PSP_SHAREDMEM_BASE
 	hex
 	default 0x2011000 if VBOOT
diff --git a/src/soc/amd/common/block/cpu/noncar/memlayout_x86.ld b/src/soc/amd/common/block/cpu/noncar/memlayout_x86.ld
index 4c2a740048..d9b29bf5c2 100644
--- a/src/soc/amd/common/block/cpu/noncar/memlayout_x86.ld
+++ b/src/soc/amd/common/block/cpu/noncar/memlayout_x86.ld
@@ -62,7 +62,7 @@ BOOTBLOCK_ADDR = BOOTBLOCK_END - CONFIG_C_ENV_BOOTBLOCK_SIZE;
  *                     +--------------------------------+ PSP_SHAREDMEM_BASE + 0x40
  *                     |     Transfer Info Structure    |
  *                     +--------------------------------+ PSP_SHAREDMEM_BASE
- *                     |          APOB (64KiB)          |
+ *                     |    APOB (PSP_APOB_DRAM_SIZE)   |
  *                     +--------------------------------+ PSP_APOB_DRAM_ADDRESS
  *                     |        Early BSP stack         |
  *                     |   (EARLYRAM_BSP_STACK_SIZE)    |
@@ -83,7 +83,7 @@ SECTIONS
 	EARLY_RESERVED_DRAM_START(CONFIG_EARLY_RESERVED_DRAM_BASE)
 
 	EARLYRAM_STACK(., CONFIG_EARLYRAM_BSP_STACK_SIZE)
-	REGION(apob, CONFIG_PSP_APOB_DRAM_ADDRESS, 64K, 1)
+	REGION(apob, CONFIG_PSP_APOB_DRAM_ADDRESS, CONFIG_PSP_APOB_DRAM_SIZE, 1)
 
 #if CONFIG(VBOOT_STARTS_BEFORE_BOOTBLOCK)
 	PSP_SHAREDMEM_DRAM_START(CONFIG_PSP_SHAREDMEM_BASE)
diff --git a/src/soc/amd/picasso/Kconfig b/src/soc/amd/picasso/Kconfig
index 2a056a2452..30ca13237c 100644
--- a/src/soc/amd/picasso/Kconfig
+++ b/src/soc/amd/picasso/Kconfig
@@ -117,6 +117,10 @@ config PSP_APOB_DRAM_ADDRESS
 	  Location in DRAM where the PSP will copy the AGESA PSP Output
 	  Block.
 
+config PSP_APOB_DRAM_SIZE
+	hex
+	default 0x10000
+
 config PSP_SHAREDMEM_BASE
 	hex
 	default 0x2011000 if VBOOT
diff --git a/src/soc/amd/sabrina/Kconfig b/src/soc/amd/sabrina/Kconfig
index 654c6e3935..48d61be038 100644
--- a/src/soc/amd/sabrina/Kconfig
+++ b/src/soc/amd/sabrina/Kconfig
@@ -123,9 +123,13 @@ config PSP_APOB_DRAM_ADDRESS
 	  Location in DRAM where the PSP will copy the AGESA PSP Output
 	  Block.
 
+config PSP_APOB_DRAM_SIZE
+	hex
+	default 0x20000
+
 config PSP_SHAREDMEM_BASE
 	hex
-	default 0x2011000 if VBOOT
+	default 0x2021000 if VBOOT
 	default 0x0
 	help
 	  This variable defines the base address in DRAM memory where PSP copies
diff --git a/src/soc/amd/sabrina/root_complex.c b/src/soc/amd/sabrina/root_complex.c
index 76ed7650e8..c911106e6b 100644
--- a/src/soc/amd/sabrina/root_complex.c
+++ b/src/soc/amd/sabrina/root_complex.c
@@ -88,7 +88,7 @@ struct dptc_input {
  *                     |   PSP shared (vboot workbuf)   |
  *                     |      (PSP_SHAREDMEM_SIZE)      |
  *                     +--------------------------------+ PSP_SHAREDMEM_BASE
- *                     |          APOB (64KiB)          |
+ *                     |          APOB (128KiB)         |
  *                     +--------------------------------+ PSP_APOB_DRAM_ADDRESS
  *                     |        Early BSP stack         |
  *                     |   (EARLYRAM_BSP_STACK_SIZE)    |