This renames CONFIG_KAISER to CONFIG_PAGE_TABLE_ISOLATION.
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[bwh: Backported to 3.2]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
* we just keep it from happening
*/
#undef CONFIG_PARAVIRT
-#undef CONFIG_KAISER
+#undef CONFIG_PAGE_TABLE_ISOLATION
#ifdef CONFIG_X86_32
#define _ASM_X86_DESC_H 1
#endif
#define X86_FEATURE_INVPCID_SINGLE (7*32+ 8) /* Effectively INVPCID && CR4.PCIDE=1 */
/* Because the ALTERNATIVE scheme is for members of the X86_FEATURE club... */
-#define X86_FEATURE_KAISER ( 7*32+31) /* "" CONFIG_KAISER w/o nokaiser */
+#define X86_FEATURE_KAISER ( 7*32+31) /* "" CONFIG_PAGE_TABLE_ISOLATION w/o nokaiser */
/* Virtualization flags: Linux defined, word 8 */
#define X86_FEATURE_TPR_SHADOW (8*32+ 0) /* Intel TPR Shadow */
#define KAISER_SHADOW_PGD_OFFSET 0x1000
#ifdef __ASSEMBLY__
-#ifdef CONFIG_KAISER
+#ifdef CONFIG_PAGE_TABLE_ISOLATION
.macro _SWITCH_TO_KERNEL_CR3 reg
movq %cr3, \reg
8:
.endm
-#else /* CONFIG_KAISER */
+#else /* CONFIG_PAGE_TABLE_ISOLATION */
.macro SWITCH_KERNEL_CR3
.endm
.macro SWITCH_KERNEL_CR3_NO_STACK
.endm
-#endif /* CONFIG_KAISER */
+#endif /* CONFIG_PAGE_TABLE_ISOLATION */
#else /* __ASSEMBLY__ */
-#ifdef CONFIG_KAISER
+#ifdef CONFIG_PAGE_TABLE_ISOLATION
/*
* Upon kernel/user mode switch, it may happen that the address
* space has to be switched before the registers have been
#else
#define kaiser_enabled 0
static inline void __init kaiser_check_boottime_disable(void) {}
-#endif /* CONFIG_KAISER */
+#endif /* CONFIG_PAGE_TABLE_ISOLATION */
/*
- * Kaiser function prototypes are needed even when CONFIG_KAISER is not set,
+ * Kaiser function prototypes are needed even when CONFIG_PAGE_TABLE_ISOLATION is not set,
* so as to build with tests on kaiser_enabled instead of #ifdefs.
*/
#ifndef __ASSEMBLY__
#include <asm/x86_init.h>
-#ifdef CONFIG_KAISER
+#ifdef CONFIG_PAGE_TABLE_ISOLATION
extern int kaiser_enabled;
#else
#define kaiser_enabled 0
static inline void clone_pgd_range(pgd_t *dst, pgd_t *src, int count)
{
memcpy(dst, src, count * sizeof(pgd_t));
-#ifdef CONFIG_KAISER
+#ifdef CONFIG_PAGE_TABLE_ISOLATION
if (kaiser_enabled) {
/* Clone the shadow pgd part as well */
memcpy(native_get_shadow_pgd(dst),
native_set_pud(pud, native_make_pud(0));
}
-#ifdef CONFIG_KAISER
+#ifdef CONFIG_PAGE_TABLE_ISOLATION
extern pgd_t kaiser_set_shadow_pgd(pgd_t *pgdp, pgd_t pgd);
static inline pgd_t *native_get_shadow_pgd(pgd_t *pgdp)
{
return NULL;
}
-#endif /* CONFIG_KAISER */
+#endif /* CONFIG_PAGE_TABLE_ISOLATION */
static inline void native_set_pgd(pgd_t *pgdp, pgd_t pgd)
{
#define X86_CR3_PCID_MASK (X86_CR3_PCID_NOFLUSH | X86_CR3_PCID_ASID_MASK)
#define X86_CR3_PCID_ASID_KERN (_AC(0x0,UL))
-#if defined(CONFIG_KAISER) && defined(CONFIG_X86_64)
+#if defined(CONFIG_PAGE_TABLE_ISOLATION) && defined(CONFIG_X86_64)
/* Let X86_CR3_PCID_ASID_USER be usable for the X86_CR3_PCID_NOFLUSH bit */
#define X86_CR3_PCID_ASID_USER (_AC(0x80,UL))
* Declare a couple of kaiser interfaces here for convenience,
* to avoid the need for asm/kaiser.h in unexpected places.
*/
-#ifdef CONFIG_KAISER
+#ifdef CONFIG_PAGE_TABLE_ISOLATION
extern int kaiser_enabled;
extern void kaiser_setup_pcid(void);
extern void kaiser_flush_tlb_on_return_to_user(void);
static void *dsalloc(size_t size, gfp_t flags, int node)
{
-#ifdef CONFIG_KAISER
+#ifdef CONFIG_PAGE_TABLE_ISOLATION
unsigned int order = get_order(size);
struct page *page;
unsigned long addr;
static void dsfree(const void *buffer, size_t size)
{
-#ifdef CONFIG_KAISER
+#ifdef CONFIG_PAGE_TABLE_ISOLATION
if (!buffer)
return;
kaiser_remove_mapping((unsigned long)buffer, size);
SWAPGS
xorl %ebx,%ebx
1:
-#ifdef CONFIG_KAISER
+#ifdef CONFIG_PAGE_TABLE_ISOLATION
/*
* We might have come in between a swapgs and a SWITCH_KERNEL_CR3
* on entry, or between a SWITCH_USER_CR3 and a swapgs on exit.
paranoid_kernel:
movq %r12, %rbx /* restore after paranoid_userspace */
TRACE_IRQS_IRETQ 0
-#ifdef CONFIG_KAISER
+#ifdef CONFIG_PAGE_TABLE_ISOLATION
/* No ALTERNATIVE for X86_FEATURE_KAISER: save_paranoid sets %ebx */
testl $2, %ebx /* SWITCH_USER_CR3 needed? */
jz paranoid_exit_no_switch
jnz nmi_userspace
nmi_kernel:
movq %r12, %rbx /* restore after nmi_userspace */
-#ifdef CONFIG_KAISER
+#ifdef CONFIG_PAGE_TABLE_ISOLATION
/* No ALTERNATIVE for X86_FEATURE_KAISER: save_paranoid sets %ebx */
testl $2, %ebx /* SWITCH_USER_CR3 needed? */
jz nmi_exit_no_switch
.balign PAGE_SIZE; \
ENTRY(name)
-#ifdef CONFIG_KAISER
+#ifdef CONFIG_PAGE_TABLE_ISOLATION
/*
* Each PGD needs to be 8k long and 8k aligned. We do not
* ever go out to userspace with these, so we do not
obj-$(CONFIG_HAVE_MEMBLOCK) += memblock.o
obj-$(CONFIG_MEMTEST) += memtest.o
-obj-$(CONFIG_KAISER) += kaiser.o
+obj-$(CONFIG_PAGE_TABLE_ISOLATION) += kaiser.o
#ifndef _LINUX_KAISER_H
#define _LINUX_KAISER_H
-#ifdef CONFIG_KAISER
+#ifdef CONFIG_PAGE_TABLE_ISOLATION
#include <asm/kaiser.h>
static inline int kaiser_map_thread_stack(void *stack)
#else
/*
- * These stubs are used whenever CONFIG_KAISER is off, which
+ * These stubs are used whenever CONFIG_PAGE_TABLE_ISOLATION is off, which
* includes architectures that support KAISER, but have it disabled.
*/
{
}
-#endif /* !CONFIG_KAISER */
+#endif /* !CONFIG_PAGE_TABLE_ISOLATION */
#endif /* _LINUX_KAISER_H */
(void)__vpp_verify; \
} while (0)
-#ifdef CONFIG_KAISER
+#ifdef CONFIG_PAGE_TABLE_ISOLATION
#define USER_MAPPED_SECTION "..user_mapped"
#else
#define USER_MAPPED_SECTION ""
If you are unsure how to answer this question, answer N.
-config KAISER
+config PAGE_TABLE_ISOLATION
bool "Remove the kernel mapping in user mode"
default y
depends on X86_64 && SMP