arm64: zynqmp: 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/20230824032712.13399-1-venkatesh.abbarapu@amd.com
Signed-off-by: Michal Simek <michal.simek@amd.com>

diff --git a/configs/xilinx_zynqmp_virt_defconfig b/configs/xilinx_zynqmp_virt_defconfig
index 26260841c5901c946cf0dda71094a9316078cbea..26820f721e389b5478ff5850523955a4c4921184 100644 (file)
--- a/configs/xilinx_zynqmp_virt_defconfig
+++ b/configs/xilinx_zynqmp_virt_defconfig
@@ -90,6 +90,7 @@ CONFIG_CMD_RTC=y
 CONFIG_CMD_TIME=y
 CONFIG_CMD_GETTIME=y
 CONFIG_CMD_RNG=y
+CONFIG_CMD_KASLRSEED=y
 CONFIG_CMD_TIMER=y
 CONFIG_CMD_REGULATOR=y
 CONFIG_CMD_SMC=y