1 files changed, 41 insertions, 0 deletions
diff --git a/config/coreboot/default/patches/0028-Kconfig-Decrease-default-HEAP_SIZE-from-1-MiB-to-512.patch b/config/coreboot/default/patches/0028-Kconfig-Decrease-default-HEAP_SIZE-from-1-MiB-to-512.patch
new file mode 100644
index 00000000..31e86e86
--- /dev/null
+++ b/config/coreboot/default/patches/0028-Kconfig-Decrease-default-HEAP_SIZE-from-1-MiB-to-512.patch
@@ -0,0 +1,41 @@
+From 7eda35a9b63d070ede24b32253855ce07c6c7d13 Mon Sep 17 00:00:00 2001
+From: Bill XIE <persmule@hardenedlinux.org>
+Date: Tue, 24 Oct 2023 13:56:16 +0800
+Subject: [PATCH 1/2] Kconfig: Decrease default HEAP_SIZE from 1 MiB to 512 KiB
+
+Commit 44a48ce7a46c ("Kconfig: Bring HEAP_SIZE to a common, large
+value") breaks S3 resume from TSEG stage cache on many platforms,
+including GM45 and Ivy Bridge, so limit it to 512 KiB.
+
+Please test this against other platforms before merging!
+
+Tested: Setting it to 0x80000 results a working S3 resume on Thinkpad
+	X200 and T430, with log in cbmem for S3 resume, while 0xa0000
+	breaks it. coreboot log during failed resume when (HEAP_SIZE
+	>= 0xa0000) cannot be obtained from EHCI debug, while log in
+	cbmem shows that ramstage is failed to be found in TSEG stage
+	cache, as shown in https://ticket.coreboot.org/issues/512 .
+
+Resolves: https://ticket.coreboot.org/issues/512
+Signed-off-by: Bill XIE <persmule@hardenedlinux.org>
+Change-Id: Ib1de1eb8487df5bdf004e544d40667833a291515
+---
+ src/Kconfig | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/Kconfig b/src/Kconfig
+index ae8024089e..6db0736715 100644
+--- a/src/Kconfig
++++ b/src/Kconfig
+@@ -751,7 +751,7 @@ config RTC
+ 
+ config HEAP_SIZE
+ 	hex
+-	default 0x100000
++	default 0x80000
+ 
+ config STACK_SIZE
+ 	hex
+-- 
+2.39.2
+