lib: add test module for CONFIG_DEBUG_VIRTUAL (e4dace36) · Commits · 戴 / test

lib/Kconfig.debug

+11 −0

Original line number	Diff line number	Diff line
		@@ -1930,6 +1930,17 @@ config TEST_KMOD

		If unsure, say N.

		config TEST_DEBUG_VIRTUAL
		tristate "Test CONFIG_DEBUG_VIRTUAL feature"
		depends on DEBUG_VIRTUAL
		help
		Test the kernel's ability to detect incorrect calls to
		virt_to_phys() done against the non-linear part of the
		kernel's virtual address map.

		If unsure, say N.


		source "samples/Kconfig"

		source "lib/Kconfig.kgdb"

+1 −0

Original line number	Diff line number	Diff line
		@@ -62,6 +62,7 @@ obj-$(CONFIG_TEST_BITMAP) += test_bitmap.o
		obj-$(CONFIG_TEST_UUID) += test_uuid.o
		obj-$(CONFIG_TEST_PARMAN) += test_parman.o
		obj-$(CONFIG_TEST_KMOD) += test_kmod.o
		obj-$(CONFIG_TEST_DEBUG_VIRTUAL) += test_debug_virtual.o

		ifeq ($(CONFIG_DEBUG_KOBJECT),y)
		CFLAGS_kobject.o += -DDEBUG

0 → 100644

+49 −0

Original line number	Diff line number	Diff line
		#include <linux/kernel.h>
		#include <linux/module.h>
		#include <linux/export.h>
		#include <linux/mm.h>
		#include <linux/vmalloc.h>
		#include <linux/slab.h>
		#include <linux/sizes.h>

		#include <asm/page.h>
		#ifdef CONFIG_MIPS
		#include <asm/bootinfo.h>
		#endif

		struct foo {
		unsigned int bar;
		};

		struct foo *foo;

		static int __init test_debug_virtual_init(void)
		{
		phys_addr_t pa;
		void *va;

		va = (void *)VMALLOC_START;
		pa = virt_to_phys(va);

		pr_info("PA: %pa for VA: 0x%lx\n", &pa, (unsigned long)va);

		foo = kzalloc(sizeof(*foo), GFP_KERNEL);
		if (!foo)
		return -ENOMEM;

		pa = virt_to_phys(foo);
		va = foo;
		pr_info("PA: %pa for VA: 0x%lx\n", &pa, (unsigned long)va);

		return 0;
		}
		module_init(test_debug_virtual_init);

		static void __exit test_debug_virtual_exit(void)
		{
		kfree(foo);
		}
		module_exit(test_debug_virtual_exit);

		MODULE_LICENSE("GPL");
		MODULE_DESCRIPTION("Test module for CONFIG_DEBUG_VIRTUAL");