releases/3.2.98/kpti-rename-to-page_table_isolation.patch

From: Kees Cook <keescook@chromium.org>
Date: Thu, 4 Jan 2018 01:14:24 +0000
Subject: 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>
[bwh: Backported to 3.2]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
 arch/x86/boot/compressed/misc.h           |  2 +-
 arch/x86/include/asm/cpufeature.h         |  2 +-
 arch/x86/include/asm/kaiser.h             | 12 ++++++------
 arch/x86/include/asm/pgtable.h            |  4 ++--
 arch/x86/include/asm/pgtable_64.h         |  4 ++--
 arch/x86/include/asm/pgtable_types.h      |  2 +-
 arch/x86/include/asm/tlbflush.h           |  2 +-
 arch/x86/kernel/cpu/perf_event_intel_ds.c |  4 ++--
 arch/x86/kernel/entry_64.S                |  6 +++---
 arch/x86/kernel/head_64.S                 |  2 +-
 arch/x86/mm/Makefile                      |  2 +-
 include/linux/kaiser.h                    |  6 +++---
 include/linux/percpu-defs.h               |  2 +-
 security/Kconfig                          |  2 +-
 14 files changed, 26 insertions(+), 26 deletions(-)

diff --git a/arch/x86/boot/compressed/misc.h b/arch/x86/boot/compressed/misc.h
index 2fa2635ee539..ac9ae2289f23 100644
--- a/arch/x86/boot/compressed/misc.h
+++ b/arch/x86/boot/compressed/misc.h
@@ -7,7 +7,7 @@
  * 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
diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h
index cb967c9db459..5d1b51652d3a 100644
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -179,7 +179,7 @@
 #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 */
diff --git a/arch/x86/include/asm/kaiser.h b/arch/x86/include/asm/kaiser.h
index c71a481ee20a..de6fd8166662 100644
--- 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.
  */
 
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index a467c19e64b5..859dc4ae92ea 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -17,7 +17,7 @@
 #ifndef __ASSEMBLY__
 
 #include <asm/x86_init.h>
-#ifdef CONFIG_KAISER
+#ifdef CONFIG_PAGE_TABLE_ISOLATION
 extern int kaiser_enabled;
 #else
 #define kaiser_enabled 0
@@ -786,7 +786,7 @@ 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),
diff --git a/arch/x86/include/asm/pgtable_64.h b/arch/x86/include/asm/pgtable_64.h
index a4a2b700a4e6..f810cca32c51 100644
--- a/arch/x86/include/asm/pgtable_64.h
+++ b/arch/x86/include/asm/pgtable_64.h
@@ -105,7 +105,7 @@ 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)
@@ -125,7 +125,7 @@ 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)
 {
diff --git a/arch/x86/include/asm/pgtable_types.h b/arch/x86/include/asm/pgtable_types.h
index 3a3c6d014696..34501e647214 100644
--- a/arch/x86/include/asm/pgtable_types.h
+++ b/arch/x86/include/asm/pgtable_types.h
@@ -81,7 +81,7 @@
 #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))
 
diff --git a/arch/x86/include/asm/tlbflush.h b/arch/x86/include/asm/tlbflush.h
index 88d849e51d72..e680388b0ea7 100644
--- a/arch/x86/include/asm/tlbflush.h
+++ b/arch/x86/include/asm/tlbflush.h
@@ -68,7 +68,7 @@ static inline void invpcid_flush_all_nonglobals(void)
  * 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);
diff --git a/arch/x86/kernel/cpu/perf_event_intel_ds.c b/arch/x86/kernel/cpu/perf_event_intel_ds.c
index fb933cdca184..721d236d0c1e 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_ds.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_ds.c
@@ -66,7 +66,7 @@ void fini_debug_store_on_cpu(int cpu)
 
 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;
@@ -87,7 +87,7 @@ 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);
diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index 81049db49e37..b232bfcf44fb 100644
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -398,7 +398,7 @@ ENTRY(save_paranoid)
 	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.
@@ -1430,7 +1430,7 @@ ENTRY(paranoid_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
@@ -1600,7 +1600,7 @@ ENTRY(nmi)
 	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
diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S
index 28aef29c42de..1de317b20fac 100644
--- a/arch/x86/kernel/head_64.S
+++ b/arch/x86/kernel/head_64.S
@@ -338,7 +338,7 @@ ENTRY(early_idt_handler)
 	.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
diff --git a/arch/x86/mm/Makefile b/arch/x86/mm/Makefile
index c9a00a5e0b87..08505d201bbe 100644
--- a/arch/x86/mm/Makefile
+++ b/arch/x86/mm/Makefile
@@ -29,4 +29,4 @@ obj-$(CONFIG_NUMA_EMU)		+= numa_emulation.o
 obj-$(CONFIG_HAVE_MEMBLOCK)		+= memblock.o
 
 obj-$(CONFIG_MEMTEST)		+= memtest.o
-obj-$(CONFIG_KAISER)		+= kaiser.o
+obj-$(CONFIG_PAGE_TABLE_ISOLATION)		+= kaiser.o
diff --git a/include/linux/kaiser.h b/include/linux/kaiser.h
index 4a4d6d911a14..58c55b1589d0 100644
--- 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 */
diff --git a/include/linux/percpu-defs.h b/include/linux/percpu-defs.h
index 56f5eeb78d1d..ea0c9148f624 100644
--- a/include/linux/percpu-defs.h
+++ b/include/linux/percpu-defs.h
@@ -28,7 +28,7 @@
 	(void)__vpp_verify;						\
 } while (0)
 
-#ifdef CONFIG_KAISER
+#ifdef CONFIG_PAGE_TABLE_ISOLATION
 #define USER_MAPPED_SECTION "..user_mapped"
 #else
 #define USER_MAPPED_SECTION ""
diff --git a/security/Kconfig b/security/Kconfig
index 4b05ddcce22c..b9bc07d97b15 100644
--- a/security/Kconfig
+++ b/security/Kconfig
@@ -96,7 +96,7 @@ 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