mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-29 23:53:55 +08:00
e4dace3615
Add a test module that allows testing that CONFIG_DEBUG_VIRTUAL works correctly, at least that it can catch invalid calls to virt_to_phys() against the non-linear kernel virtual address map. Link: http://lkml.kernel.org/r/20170808164035.26725-1-f.fainelli@gmail.com Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Cc: "Luis R. Rodriguez" <mcgrof@kernel.org> Cc: Kees Cook <keescook@chromium.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
50 lines
911 B
C
50 lines
911 B
C
#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");
|