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KPTI: Report when enabled

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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>
This commit is contained in:
Kees Cook 2018-01-03 10:18:01 -08:00 committed by Greg Kroah-Hartman
parent e71fac0172
commit ea6cd39d23
1 changed files with 6 additions and 1 deletions
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7
arch/x86/mm/kaiser.c
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@ -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 */