Revert "Revert "Build GSIs (aosp_$arch products) in sparse format""
This reverts commit 132748cb80db768455e9118970520db180e905a5.
Reason for revert: The e2fsck issue, b/112062612, that caused the
revert of the original CL has been fixed in aosp/725259.
Change-Id: I5c919aedcc5b1c4823f565ea2bbe0e6ea81bc3b0
diff --git a/target/board/BoardConfigGsiCommon.mk b/target/board/BoardConfigGsiCommon.mk
index 24614de..4a60d47 100644
--- a/target/board/BoardConfigGsiCommon.mk
+++ b/target/board/BoardConfigGsiCommon.mk
@@ -3,11 +3,12 @@
# Common compile-time definitions for GSI
#
-# system.img is always ext4 with sparse option
+# GSIs always use ext4.
TARGET_USERIMAGES_USE_EXT4 := true
-# TODO(b/63790380): emulator doesn't support sparse yet
-#TARGET_USERIMAGES_SPARSE_EXT_DISABLED := false
-TARGET_USERIMAGES_SPARSE_EXT_DISABLED := true
+# GSIs are historically released in sparse format.
+# Some vendors' bootloaders don't work properly with raw format images. So
+# we explicit specify this need below (even though it's the current default).
+TARGET_USERIMAGES_SPARSE_EXT_DISABLED := false
TARGET_USES_MKE2FS := true
# Android Verified Boot (AVB):