1 files changed, 129 insertions, 0 deletions

diff --git a/arch/x86/platform/intel-quark/imr_selftest.c b/arch/x86/platform/intel-quark/imr_selftest.c
new file mode 100644
index 000000000000..c9a0838890e2
--- /dev/null
+++ b/arch/x86/platform/intel-quark/imr_selftest.c
@@ -0,0 +1,129 @@
+/**
+ * imr_selftest.c
+ *
+ * Copyright(c) 2013 Intel Corporation.
+ * Copyright(c) 2015 Bryan O'Donoghue <pure.logic@nexus-software.ie>
+ *
+ * IMR self test. The purpose of this module is to run a set of tests on the
+ * IMR API to validate it's sanity. We check for overlapping, reserved
+ * addresses and setup/teardown sanity.
+ *
+ */
+
+#include <asm-generic/sections.h>
+#include <asm/imr.h>
+#include <linux/init.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/types.h>
+
+#define SELFTEST KBUILD_MODNAME ": "
+/**
+ * imr_self_test_result - Print result string for self test.
+ *
+ * @res:        result code - true if test passed false otherwise.
+ * @fmt:        format string.
+ * ...          variadic argument list.
+ */
+static void __init imr_self_test_result(int res, const char *fmt, ...)
+{
+        va_list vlist;
+
+        /* Print pass/fail. */
+        if (res)
+                pr_info(SELFTEST "pass ");
+        else
+                pr_info(SELFTEST "fail ");
+
+        /* Print variable string. */
+        va_start(vlist, fmt);
+        vprintk(fmt, vlist);
+        va_end(vlist);
+
+        /* Optional warning. */
+        WARN(res == 0, "test failed");
+}
+#undef SELFTEST
+
+/**
+ * imr_self_test
+ *
+ * Verify IMR self_test with some simple tests to verify overlap,
+ * zero sized allocations and 1 KiB sized areas.
+ *
+ */
+static void __init imr_self_test(void)
+{
+        phys_addr_t base  = virt_to_phys(&_text);
+        size_t size = virt_to_phys(&__end_rodata) - base;
+        const char *fmt_over = "overlapped IMR @ (0x%08lx - 0x%08lx)\n";
+        int ret;
+
+        /* Test zero zero. */
+        ret = imr_add_range(0, 0, 0, 0, false);
+        imr_self_test_result(ret < 0, "zero sized IMR\n");
+
+        /* Test exact overlap. */
+        ret = imr_add_range(base, size, IMR_CPU, IMR_CPU, false);
+        imr_self_test_result(ret < 0, fmt_over, __va(base), __va(base + size));
+
+        /* Test overlap with base inside of existing. */
+        base += size - IMR_ALIGN;
+        ret = imr_add_range(base, size, IMR_CPU, IMR_CPU, false);
+        imr_self_test_result(ret < 0, fmt_over, __va(base), __va(base + size));
+
+        /* Test overlap with end inside of existing. */
+        base -= size + IMR_ALIGN * 2;
+        ret = imr_add_range(base, size, IMR_CPU, IMR_CPU, false);
+        imr_self_test_result(ret < 0, fmt_over, __va(base), __va(base + size));
+
+        /* Test that a 1 KiB IMR @ zero with read/write all will bomb out. */
+        ret = imr_add_range(0, IMR_ALIGN, IMR_READ_ACCESS_ALL,
+                            IMR_WRITE_ACCESS_ALL, false);
+        imr_self_test_result(ret < 0, "1KiB IMR @ 0x00000000 - access-all\n");
+
+        /* Test that a 1 KiB IMR @ zero with CPU only will work. */
+        ret = imr_add_range(0, IMR_ALIGN, IMR_CPU, IMR_CPU, false);
+        imr_self_test_result(ret >= 0, "1KiB IMR @ 0x00000000 - cpu-access\n");
+        if (ret >= 0) {
+                ret = imr_remove_range(0, IMR_ALIGN);
+                imr_self_test_result(ret == 0, "teardown - cpu-access\n");
+        }
+
+        /* Test 2 KiB works. */
+        size = IMR_ALIGN * 2;
+        ret = imr_add_range(0, size, IMR_READ_ACCESS_ALL,
+                            IMR_WRITE_ACCESS_ALL, false);
+        imr_self_test_result(ret >= 0, "2KiB IMR @ 0x00000000\n");
+        if (ret >= 0) {
+                ret = imr_remove_range(0, size);
+                imr_self_test_result(ret == 0, "teardown 2KiB\n");
+        }
+}
+
+/**
+ * imr_self_test_init - entry point for IMR driver.
+ *
+ * return: -ENODEV for no IMR support 0 if good to go.
+ */
+static int __init imr_self_test_init(void)
+{
+        imr_self_test();
+        return 0;
+}
+
+/**
+ * imr_self_test_exit - exit point for IMR code.
+ *
+ * return:
+ */
+static void __exit imr_self_test_exit(void)
+{
+}
+
+module_init(imr_self_test_init);
+module_exit(imr_self_test_exit);
+
+MODULE_AUTHOR("Bryan O'Donoghue <pure.logic@nexus-software.ie>");
+MODULE_DESCRIPTION("Intel Isolated Memory Region self-test driver");
+MODULE_LICENSE("Dual BSD/GPL");