[kvm-unit-tests,v2,4/8] s390x: Add diag10 tests

Commit Message

Janosch Frank March 20, 2018, 11:19 a.m. UTC

Let's add some tests for the diag10 "Release pages" instruction.

Signed-off-by: Janosch Frank <[e-mail]>
Reviewed-by: Thomas Huth <[e-mail]>
---
 s390x/Makefile      |  1 +
 s390x/diag10.c      | 81 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 s390x/unittests.cfg |  3 ++
 3 files changed, 85 insertions(+)
 create mode 100644 s390x/diag10.c

Patch

diff --git a/s390x/Makefile b/s390x/Makefile
index b73031d..bc5dd91 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 <[e-mail]>
+ *
+ * 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 8321e9b..5531590 100644
--- a/s390x/unittests.cfg
+++ b/s390x/unittests.cfg
@@ -41,3 +41,6 @@  accel = kvm
 
 [skey]
 file = skey.elf
+
+[diag10]
+file = diag10.elf