From 66db1f915e4dc28c7b446a8a8dff6aa77b0f2c5b Mon Sep 17 00:00:00 2001
From: "Isaac J. Manjarres" <isaacm@codeaurora.org>
Date: Thu, 11 Jun 2020 09:12:37 -0700
Subject: [PATCH] arm64: defconfig: Remove unnecessary configs in
 genericarmv8-64

Certain configs that are enabled in genericarmv8-64 are not
required for the usecases that the kernel is supposed to cater.
For example, IOMMU support is not required for genericarmv8-64,
yet, the drivers for it are built into the kernel image. This
leads to a bloated kernel image with a larger memory footprint,
as well as larger runtime memory footprint, as certain drivers
may allocate data structures that go by unused. Remove certain
extraneous configs.

Change-Id: Iefe8dd2a35a4a29ed97338ec5fea5c147da14eda
Signed-off-by: Isaac J. Manjarres <isaacm@codeaurora.org>
---
 .../configs/vendor/genericarmv8-64_defconfig    | 17 +++--------------
 1 file changed, 3 insertions(+), 14 deletions(-)

diff --git a/arch/arm64/configs/vendor/genericarmv8-64_defconfig b/arch/arm64/configs/vendor/genericarmv8-64_defconfig
index 2ea485acb6b8..7ddf567fd063 100644
--- a/arch/arm64/configs/vendor/genericarmv8-64_defconfig
+++ b/arch/arm64/configs/vendor/genericarmv8-64_defconfig
@@ -13,11 +13,8 @@ CONFIG_TASK_XACCT=y
 CONFIG_TASK_IO_ACCOUNTING=y
 CONFIG_IKCONFIG=y
 CONFIG_IKCONFIG_PROC=y
-CONFIG_MEMCG=y
-CONFIG_MEMCG_SWAP=y
 CONFIG_BLK_CGROUP=y
 CONFIG_CGROUP_PIDS=y
-CONFIG_CGROUP_HUGETLB=y
 CONFIG_CPUSETS=y
 CONFIG_CGROUP_DEVICE=y
 CONFIG_CGROUP_CPUACCT=y
@@ -36,8 +33,7 @@ CONFIG_ARCH_LAHAINA=y
 CONFIG_ARCH_QTI_VM=y
 CONFIG_SCHED_MC=y
 CONFIG_SECCOMP=y
-CONFIG_CRASH_DUMP=y
-CONFIG_XEN=y
+CONFIG_PARAVIRT=y
 CONFIG_COMPAT=y
 CONFIG_RANDOMIZE_BASE=y
 CONFIG_HIBERNATION=y
@@ -76,8 +72,6 @@ CONFIG_MEMORY_HOTPLUG_DEFAULT_ONLINE=y
 CONFIG_MEMORY_HOTPLUG_MOVABLE_NODE=y
 CONFIG_MEMORY_HOTREMOVE=y
 CONFIG_KSM=y
-CONFIG_MEMORY_FAILURE=y
-CONFIG_TRANSPARENT_HUGEPAGE=y
 CONFIG_CMA=y
 CONFIG_CMA_DIRECT_UTILIZATION=y
 CONFIG_CMA_PCP_LISTS=y
@@ -202,6 +196,7 @@ CONFIG_INPUT_MISC=y
 # CONFIG_SERIO_SERPORT is not set
 CONFIG_SERIO_AMBAKMI=y
 CONFIG_LEGACY_PTY_COUNT=16
+# CONFIG_DEVMEM is not set
 CONFIG_SERIAL_8250=y
 CONFIG_SERIAL_8250_CONSOLE=y
 CONFIG_SERIAL_8250_EXTENDED=y
@@ -215,7 +210,6 @@ CONFIG_SERIAL_XILINX_PS_UART_CONSOLE=y
 CONFIG_SERIAL_FSL_LPUART=y
 CONFIG_SERIAL_FSL_LPUART_CONSOLE=y
 CONFIG_SERIAL_DEV_BUS=y
-# CONFIG_HVC_XEN is not set
 CONFIG_HVC_DCC=y
 CONFIG_HVC_HAVEN=y
 CONFIG_HVC_HAVEN_CONSOLE=y
@@ -266,8 +260,6 @@ CONFIG_QCOM_HIDMA_MGMT=y
 CONFIG_QCOM_HIDMA=y
 CONFIG_MSM_GPI_DMA=y
 CONFIG_MSM_GPI_DMA_DEBUG=y
-CONFIG_VFIO=y
-CONFIG_VFIO_PCI=y
 CONFIG_VIRT_DRIVERS=y
 CONFIG_HAVEN_DRIVERS=y
 CONFIG_HH_CTRL=y
@@ -280,8 +272,6 @@ CONFIG_HH_MEM_NOTIFIER=y
 CONFIG_VIRTIO_PCI=y
 CONFIG_VIRTIO_BALLOON=y
 CONFIG_VIRTIO_MMIO=y
-CONFIG_XEN_GNTDEV=y
-CONFIG_XEN_GRANT_DEV_ALLOC=y
 CONFIG_STAGING=y
 CONFIG_ION=y
 CONFIG_ION_MSM_HEAPS=y
@@ -292,7 +282,7 @@ CONFIG_COMMON_CLK_CS2000_CP=y
 CONFIG_CLK_QORIQ=y
 CONFIG_COMMON_CLK_XGENE=y
 CONFIG_COMMON_CLK_QCOM=y
-CONFIG_IOMMU_IO_PGTABLE_LPAE=y
+# CONFIG_IOMMU_SUPPORT is not set
 CONFIG_REMOTEPROC=y
 CONFIG_QCOM_MEM_BUF=y
 CONFIG_EXTCON=y
@@ -316,7 +306,6 @@ CONFIG_CUSE=m
 CONFIG_OVERLAY_FS=m
 CONFIG_VFAT_FS=y
 CONFIG_TMPFS=y
-CONFIG_HUGETLBFS=y
 CONFIG_CONFIGFS_FS=y
 CONFIG_EFIVAR_FS=y
 CONFIG_SQUASHFS=y