[xen staging] kconfig: introduce option to independently enable libfdt

[patchbot@xxxxxxx]

commit 373c67d8a65556278e7cf8a226d19682c626de68
Author:     Daniel P. Smith <dpsmith@xxxxxxxxxxxxxxxxxxxx>
AuthorDate: Mon Apr 14 13:08:56 2025 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Mon Apr 14 13:08:56 2025 +0200

    kconfig: introduce option to independently enable libfdt
    
    Currently, the inclusion of libfdt is controlled by the 
CONFIG_HAS_DEVICE_TREE
    kconfig flag. This flag also changes behavior in a few places, such as boot
    module processing for XSM. To support the ability to include libfdt without
    changing these behaviors, introduce CONFIG_LIBFDT. The inclusion of
    libfdt is then moved under CONFIG_LIBFDT.
    
    Signed-off-by: Daniel P. Smith <dpsmith@xxxxxxxxxxxxxxxxxxxx>
    Signed-off-by: Jason Andryuk <jason.andryuk@xxxxxxx>
    Reviewed-by: Denis Mukhin <dmukhin@xxxxxxxx>
    Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 xen/common/Kconfig  | 4 ++++
 xen/common/Makefile | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/xen/common/Kconfig b/xen/common/Kconfig
index 42a2b6a03f..be28060716 100644
--- a/xen/common/Kconfig
+++ b/xen/common/Kconfig
@@ -72,6 +72,7 @@ config HAS_COMPAT
 
 config HAS_DEVICE_TREE
        bool
+       select LIBFDT
 
 config HAS_DIT # Data Independent Timing
        bool
@@ -109,6 +110,9 @@ config HAS_UBSAN
 config HAS_VMAP
        bool
 
+config LIBFDT
+       bool
+
 config MEM_ACCESS_ALWAYS_ON
        bool
 
diff --git a/xen/common/Makefile b/xen/common/Makefile
index f625031d16..98f0873056 100644
--- a/xen/common/Makefile
+++ b/xen/common/Makefile
@@ -80,7 +80,7 @@ obj-y += sched/
 obj-$(CONFIG_UBSAN) += ubsan/
 
 obj-$(CONFIG_NEEDS_LIBELF) += libelf/
-obj-$(CONFIG_HAS_DEVICE_TREE) += libfdt/
+obj-$(CONFIG_LIBFDT) += libfdt/
 
 CONF_FILE := $(if $(patsubst 
/%,,$(KCONFIG_CONFIG)),$(objtree)/)$(KCONFIG_CONFIG)
 $(obj)/config.gz: $(CONF_FILE)
--
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