From: Janosch Frank <frankja@xxxxxxxxxxxxxxxxxx>
Let's add some tests for the diag10 "Release pages" instruction.
Signed-off-by: Janosch Frank <frankja@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Thomas Huth <thuth@xxxxxxxxxx>
Signed-off-by: Thomas Huth <thuth@xxxxxxxxxx>
---
s390x/Makefile | 1 +
s390x/diag10.c | 81 +++++++++++++++++++++++++++++++++++++++++++++++++++++
s390x/unittests.cfg | 3 ++
3 files changed, 85 insertions(+)
create mode 100644 s390x/diag10.c
diff --git a/s390x/Makefile b/s390x/Makefile
index c860ed8..1356246 100644
--- a/s390x/Makefile
+++ b/s390x/Makefile
@@ -4,6 +4,7 @@ tests += $(TEST_DIR)/emulator.elf
tests += $(TEST_DIR)/sieve.elf
tests += $(TEST_DIR)/sthyi.elf
tests += $(TEST_DIR)/skey.elf
+tests += $(TEST_DIR)/diag10.elf
all: directories test_cases
diff --git a/s390x/diag10.c b/s390x/diag10.c
new file mode 100644
index 0000000..806ebc6
--- /dev/null
+++ b/s390x/diag10.c
@@ -0,0 +1,81 @@
+/*
+ * Release pages hypercall tests (DIAG 10)
+ *
+ * Copyright (c) 2018 IBM Corp
+ *
+ * Authors:
+ * Janosch Frank <frankja@xxxxxxxxxxxxxxxxxx>
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Library General Public License version 2.
+ */
+
+#include <libcflat.h>
+#include <asm/asm-offsets.h>
+#include <asm/interrupt.h>
+#include <asm/page.h>
+
+static uint8_t pagebuf[PAGE_SIZE * 2] __attribute__((aligned(PAGE_SIZE * 2)));
+const unsigned long page0 = (unsigned long)pagebuf;
+const unsigned long page1 = (unsigned long)(pagebuf + PAGE_SIZE);
+
+/* Tells the host to release pages from guest real addresses start to
+ * end. Parameters have to be page aligned, instruction is privileged.
+ */
+static inline void diag10(unsigned long start, unsigned long end)
+{
+ asm volatile (
+ "diag %0,%1,0x10\n"
+ : : "a" (start), "a" (end));
+}
+
+/* Try freeing the prefix */
+static void test_prefix(void)
+{
+ expect_pgm_int();
+ diag10(0, 0);
+ check_pgm_int_code(PGM_INT_CODE_SPECIFICATION);
+
+ expect_pgm_int();
+ diag10(0x1000, 0x1000);
+ check_pgm_int_code(PGM_INT_CODE_SPECIFICATION);
+
+ expect_pgm_int();
+ diag10(0, 0x1000);
+ check_pgm_int_code(PGM_INT_CODE_SPECIFICATION);
+}
+
+static void test_params(void)
+{
+ /* end < start */
+ expect_pgm_int();
+ diag10(page1, page0);
+ check_pgm_int_code(PGM_INT_CODE_SPECIFICATION);
+
+ /* Unaligned start */
+ expect_pgm_int();
+ diag10((unsigned long) pagebuf + 42, page1);
+ check_pgm_int_code(PGM_INT_CODE_SPECIFICATION);
+
+ /* Unaligned end */
+ expect_pgm_int();
+ diag10(page0, (unsigned long) pagebuf + PAGE_SIZE + 42);
+ check_pgm_int_code(PGM_INT_CODE_SPECIFICATION);
+}
+
+static void test_priv(void)
+{
+ expect_pgm_int();
+ enter_pstate();
+ diag10(page0, page0);
+ check_pgm_int_code(PGM_INT_CODE_PRIVILEGED_OPERATION);
+}
+
+int main(void)
+{
+ report_prefix_push("diag10");
+ test_prefix();
+ test_params();
+ test_priv();
+ return report_summary();
+}
diff --git a/s390x/unittests.cfg b/s390x/unittests.cfg
index c98cddd..d29d23e 100644
--- a/s390x/unittests.cfg
+++ b/s390x/unittests.cfg
@@ -40,3 +40,6 @@ file = sthyi.elf
[skey]
file = skey.elf
+
+[diag10]
+file = diag10.elf
--
1.8.3.1
