[kvm-unit-tests PATCH 2/4] s390x/Makefile: Add more comments

[Janosch Frank <frankja@linux.ibm.com>]

More comments in Makefiles can only make them more approachable.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
---
 s390x/Makefile | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/s390x/Makefile b/s390x/Makefile
index 2933b452..457b8455 100644
--- a/s390x/Makefile
+++ b/s390x/Makefile
@@ -50,12 +50,15 @@ pv-tests += $(TEST_DIR)/pv-icptcode.elf
 pv-tests += $(TEST_DIR)/pv-ipl.elf
 pv-tests += $(TEST_DIR)/pv-edat1.elf
 
+# Add PV host tests if we're able to generate them
+# The host key document and a tool to generate SE headers are the prerequisite
 ifneq ($(HOST_KEY_DOCUMENT),)
 ifneq ($(GEN_SE_HEADER),)
 tests += $(pv-tests)
 endif
 endif
 
+# Add binary flat images for use in non-KVM hypervisors
 tests_binary = $(patsubst %.elf,%.bin,$(tests))
 ifneq ($(HOST_KEY_DOCUMENT),)
 tests_pv_binary = $(patsubst %.bin,%.pv.bin,$(tests_binary))
@@ -142,6 +145,7 @@ $(TEST_DIR)/pv-icptcode.elf: pv-snippets += $(SNIPPET_DIR)/asm/pv-icpt-vir-timin
 $(TEST_DIR)/pv-ipl.elf: pv-snippets += $(SNIPPET_DIR)/asm/pv-diag-308.gbin
 $(TEST_DIR)/pv-edat1.elf: pv-snippets += $(SNIPPET_DIR)/c/pv-memhog.gbin
 
+# Add PV tests and snippets if GEN_SE_HEADER is set
 ifneq ($(GEN_SE_HEADER),)
 snippets += $(pv-snippets)
 tests += $(pv-tests)
@@ -150,6 +154,7 @@ else
 snippet-hdr-obj =
 endif
 
+# Generate loader script
 lds-autodepend-flags = -MMD -MF $(dir $*).$(notdir $*).d -MT $@
 %.lds: %.lds.S $(asm-offsets)
 	$(CPP) $(lds-autodepend-flags) $(CPPFLAGS) -P -C -o $@ $<
-- 
2.43.0