[PATCH] KVM: selftests: enable pgste option for the linker on s390

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To avoid testcase failures we need to enable the pgstes. This can be
done with /proc/sys/vm/allocate_pgste or with a linker option that
creates an  S390_PGSTE program header.

Signed-off-by: Christian Borntraeger <borntraeger@xxxxxxxxxx>
---
 tools/testing/selftests/kvm/Makefile | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile
index aef5bd1166cf..4aac14c1919f 100644
--- a/tools/testing/selftests/kvm/Makefile
+++ b/tools/testing/selftests/kvm/Makefile
@@ -44,7 +44,10 @@ CFLAGS += -O2 -g -std=gnu99 -fno-stack-protector -fno-PIE -I$(LINUX_TOOL_INCLUDE
 no-pie-option := $(call try-run, echo 'int main() { return 0; }' | \
         $(CC) -Werror $(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS) -no-pie -x c - -o "$$TMP", -no-pie)
 
-LDFLAGS += -pthread $(no-pie-option)
+# On s390, build the testcases KVM-enabled
+pgste-option := $(call cc-ldoption, -Wl$(comma)--s390-pgste)
+
+LDFLAGS += -pthread $(no-pie-option) $(pgste-option)
 
 # After inclusion, $(OUTPUT) is defined and
 # $(TEST_GEN_PROGS) starts with $(OUTPUT)/
-- 
2.21.0




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