arm64: versal: Enable the config CMD_KASLRSEED

Kernel Address Space Layout Randomization (KASLR) is a hardening
feature that aims to make it more difficult to take advantage
of known exploits in the kernel, by placing kernel data structures
at a random address at each boot.The bootloader supports randomizing
the virtual address at which the kernel image is loaded.
The bootloader must provide entropy by passing a random u64 value
in the /chosen/kaslr-seed device tree node.
When we run "kaslrseed" command from U-Boot, the bootloader will
genarate the kaslr-seed and update the /chosen/kaslr-seed DT property.

Signed-off-by: Venkatesh Yadav Abbarapu <venkatesh.abbarapu@amd.com>
Link: https://lore.kernel.org/r/20230831032612.2729-4-venkatesh.abbarapu@amd.com
Signed-off-by: Michal Simek <michal.simek@amd.com>

diff --git a/configs/xilinx_versal_virt_defconfig b/configs/xilinx_versal_virt_defconfig
index 5d5a23b1a3d39d6e40e0e823d94019eb82184a7e..89566c7d52c058942ddd478221526a80b61dc27e 100644 (file)
--- a/configs/xilinx_versal_virt_defconfig
+++ b/configs/xilinx_versal_virt_defconfig
@@ -51,6 +51,7 @@ CONFIG_CMD_CACHE=y
 CONFIG_CMD_EFIDEBUG=y
 CONFIG_CMD_TIME=y
 CONFIG_CMD_RNG=y
+CONFIG_CMD_KASLRSEED=y
 CONFIG_CMD_TIMER=y
 CONFIG_CMD_SMC=y
 CONFIG_CMD_TPM=y