diff options
| author | Kees Cook <keescook@chromium.org> | 2018-01-03 10:18:01 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-01-05 15:46:36 +0100 |
| commit | ea6cd39d230f71e27facc0667c1986504e5b0f54 (patch) | |
| tree | c4d0e75109055c34629f293acd5610500b492e65 | |
| parent | e71fac01727a9495f08de9db5259089bee311766 (diff) | |
KPTI: Report when enabled
Make sure dmesg reports when KPTI is enabled.
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | arch/x86/mm/kaiser.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/x86/mm/kaiser.c b/arch/x86/mm/kaiser.c index d43f36912219..b6b0f3aa4f77 100644 --- a/arch/x86/mm/kaiser.c +++ b/arch/x86/mm/kaiser.c @@ -10,6 +10,9 @@ #include <linux/mm.h> #include <linux/uaccess.h> +#undef pr_fmt +#define pr_fmt(fmt) "Kernel/User page tables isolation: " fmt + #include <asm/kaiser.h> #include <asm/tlbflush.h> /* to verify its kaiser declarations */ #include <asm/pgtable.h> @@ -292,7 +295,7 @@ enable: return; disable: - pr_info("Kernel/User page tables isolation: disabled\n"); + pr_info("disabled\n"); silent_disable: kaiser_enabled = 0; @@ -352,6 +355,8 @@ void __init kaiser_init(void) kaiser_add_user_map_early(&debug_idt_table, sizeof(gate_desc) * NR_VECTORS, __PAGE_KERNEL); + + pr_info("enabled\n"); } /* Add a mapping to the shadow mapping, and synchronize the mappings */ |