KPTI: Rename to PAGE_TABLE_ISOLATION

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>
2018-01-03 10:17:35 -08:00 · 2018-01-03 10:17:35 -08:00 · e71fac0172
parent 59094faf3f
commit e71fac0172
16 changed files with 31 additions and 31 deletions
--- a/arch/x86/boot/compressed/misc.h
+++ b/arch/x86/boot/compressed/misc.h
@ -9,7 +9,7 @@
 */
 #undef CONFIG_PARAVIRT
 #undef CONFIG_PARAVIRT_SPINLOCKS
-#undef CONFIG_KAISER
+#undef CONFIG_PAGE_TABLE_ISOLATION
 #undef CONFIG_KASAN

 #include <linux/linkage.h>
--- a/arch/x86/entry/entry_64.S
+++ b/arch/x86/entry/entry_64.S
@ -1071,7 +1071,7 @@ ENTRY(paranoid_entry)
 	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.
@ -1111,7 +1111,7 @@ ENTRY(paranoid_exit)
 	DISABLE_INTERRUPTS(CLBR_NONE)
 	TRACE_IRQS_OFF_DEBUG
 	TRACE_IRQS_IRETQ_DEBUG
-#ifdef CONFIG_KAISER
+#ifdef CONFIG_PAGE_TABLE_ISOLATION
 	/* No ALTERNATIVE for X86_FEATURE_KAISER: paranoid_entry sets %ebx */
 	testl	$2, %ebx			/* SWITCH_USER_CR3 needed? */
 	jz	paranoid_exit_no_switch
@ -1340,7 +1340,7 @@ ENTRY(nmi)

 	movq	%rsp, %rdi
 	movq	$-1, %rsi
-#ifdef CONFIG_KAISER
+#ifdef CONFIG_PAGE_TABLE_ISOLATION
 	/* Unconditionally use kernel CR3 for do_nmi() */
 	/* %rax is saved above, so OK to clobber here */
 	ALTERNATIVE "jmp 2f", "movq %cr3, %rax", X86_FEATURE_KAISER
@ -1354,7 +1354,7 @@ ENTRY(nmi)
 #endif
 	call	do_nmi

-#ifdef CONFIG_KAISER
+#ifdef CONFIG_PAGE_TABLE_ISOLATION
 	/*
 	 * Unconditionally restore CR3.  I know we return to
 	 * kernel code that needs user CR3, but do we ever return
@ -1584,7 +1584,7 @@ end_repeat_nmi:
 1:
 	movq	%rsp, %rdi
 	movq	$-1, %rsi
-#ifdef CONFIG_KAISER
+#ifdef CONFIG_PAGE_TABLE_ISOLATION
 	/* Unconditionally use kernel CR3 for do_nmi() */
 	/* %rax is saved above, so OK to clobber here */
 	ALTERNATIVE "jmp 2f", "movq %cr3, %rax", X86_FEATURE_KAISER
@ -1600,7 +1600,7 @@ end_repeat_nmi:
 	/* paranoidentry do_nmi, 0; without TRACE_IRQS_OFF */
 	call	do_nmi

-#ifdef CONFIG_KAISER
+#ifdef CONFIG_PAGE_TABLE_ISOLATION
 	/*
 	 * Unconditionally restore CR3.  We might be returning to
 	 * kernel code that needs user CR3, like just just before
--- a/arch/x86/events/intel/ds.c
+++ b/arch/x86/events/intel/ds.c
@ -274,7 +274,7 @@ static DEFINE_PER_CPU(void *, insn_buffer);

 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;
@ -295,7 +295,7 @@ static void *dsalloc(size_t size, gfp_t flags, int node)

 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);
--- a/arch/x86/include/asm/cpufeatures.h
+++ b/arch/x86/include/asm/cpufeatures.h
@ -199,7 +199,7 @@
 #define X86_FEATURE_AVX512_4FMAPS (7*32+17) /* AVX-512 Multiply Accumulation Single precision */

 /* 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 */
--- a/arch/x86/include/asm/kaiser.h
+++ b/arch/x86/include/asm/kaiser.h
@ -20,7 +20,7 @@
 #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
@ -69,7 +69,7 @@ movq PER_CPU_VAR(unsafe_stack_register_backup), %rax
 8:
 .endm

-#else /* CONFIG_KAISER */
+#else /* CONFIG_PAGE_TABLE_ISOLATION */

 .macro SWITCH_KERNEL_CR3
 .endm
@ -78,11 +78,11 @@ movq PER_CPU_VAR(unsafe_stack_register_backup), %rax
 .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
@ -100,10 +100,10 @@ extern void __init kaiser_check_boottime_disable(void);
 #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.
 */

--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@ -18,7 +18,7 @@
 #ifndef __ASSEMBLY__
 #include <asm/x86_init.h>

-#ifdef CONFIG_KAISER
+#ifdef CONFIG_PAGE_TABLE_ISOLATION
 extern int kaiser_enabled;
 #else
 #define kaiser_enabled 0
@ -920,7 +920,7 @@ static inline void pmdp_set_wrprotect(struct mm_struct *mm,
 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),
--- a/arch/x86/include/asm/pgtable_64.h
+++ b/arch/x86/include/asm/pgtable_64.h
@ -106,7 +106,7 @@ static inline void native_pud_clear(pud_t *pud)
 	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)
@ -127,7 +127,7 @@ static inline pgd_t *native_get_shadow_pgd(pgd_t *pgdp)
 	BUILD_BUG_ON(1);
 	return NULL;
 }
-#endif /* CONFIG_KAISER */
+#endif /* CONFIG_PAGE_TABLE_ISOLATION */

 static inline void native_set_pgd(pgd_t *pgdp, pgd_t pgd)
 {
--- a/arch/x86/include/asm/pgtable_types.h
+++ b/arch/x86/include/asm/pgtable_types.h
@ -144,7 +144,7 @@
 #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))

--- a/arch/x86/include/asm/tlbflush.h
+++ b/arch/x86/include/asm/tlbflush.h
@ -136,7 +136,7 @@ static inline void cr4_set_bits_and_update_boot(unsigned long mask)
 * 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);
--- a/arch/x86/kernel/head_64.S
+++ b/arch/x86/kernel/head_64.S
@ -405,7 +405,7 @@ GLOBAL(early_recursion_flag)
 	.balign	PAGE_SIZE; \
 GLOBAL(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
--- a/arch/x86/mm/Makefile
+++ b/arch/x86/mm/Makefile
@ -38,4 +38,4 @@ obj-$(CONFIG_NUMA_EMU)		+= numa_emulation.o
 obj-$(CONFIG_X86_INTEL_MPX)	+= mpx.o
 obj-$(CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS) += pkeys.o
 obj-$(CONFIG_RANDOMIZE_MEMORY)	+= kaslr.o
-obj-$(CONFIG_KAISER)		+= kaiser.o
+obj-$(CONFIG_PAGE_TABLE_ISOLATION)		+= kaiser.o
--- a/arch/x86/mm/kaslr.c
+++ b/arch/x86/mm/kaslr.c
@ -189,6 +189,6 @@ void __meminit init_trampoline(void)
 		*pud_tramp = *pud;
 	}

-	/* Avoid set_pgd(), in case it's complicated by CONFIG_KAISER */
+	/* Avoid set_pgd(), in case it's complicated by CONFIG_PAGE_TABLE_ISOLATION */
 	trampoline_pgd_entry = __pgd(_KERNPG_TABLE | __pa(pud_page_tramp));
 }
--- a/include/linux/kaiser.h
+++ b/include/linux/kaiser.h
@ -1,7 +1,7 @@
 #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)
@ -24,7 +24,7 @@ static inline void kaiser_unmap_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.
 */

@ -48,5 +48,5 @@ static inline void kaiser_unmap_thread_stack(void *stack)
 {
 }

-#endif /* !CONFIG_KAISER */
+#endif /* !CONFIG_PAGE_TABLE_ISOLATION */
 #endif /* _LINUX_KAISER_H */
--- a/include/linux/percpu-defs.h
+++ b/include/linux/percpu-defs.h
@ -35,7 +35,7 @@

 #endif

-#ifdef CONFIG_KAISER
+#ifdef CONFIG_PAGE_TABLE_ISOLATION
 #define USER_MAPPED_SECTION "..user_mapped"
 #else
 #define USER_MAPPED_SECTION ""
--- a/security/Kconfig
+++ b/security/Kconfig
@ -31,7 +31,7 @@ config SECURITY

 	  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
--- a/tools/arch/x86/include/asm/cpufeatures.h
+++ b/tools/arch/x86/include/asm/cpufeatures.h
@ -198,7 +198,7 @@
 #define X86_FEATURE_AVX512_4FMAPS (7*32+17) /* AVX-512 Multiply Accumulation Single precision */

 /* 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 */