From: Hugh Dickins <hughd@google.com>
Date: Sun, 10 Sep 2017 00:31:18 +0000 (-0700)
Subject: kaiser: name that 0x1000 KAISER_SHADOW_PGD_OFFSET
X-Git-Tag: v4.9.75~24
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=c27cdea56c546d0a6aa9114d9f5166404f3f14dd;p=platform%2Fkernel%2Flinux-amlogic.git

kaiser: name that 0x1000 KAISER_SHADOW_PGD_OFFSET


There's a 0x1000 in various places, which looks better with a name.

Signed-off-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S
index 756dcbb41ccf..299375379b05 100644
--- a/arch/x86/entry/entry_64.S
+++ b/arch/x86/entry/entry_64.S
@@ -1318,7 +1318,7 @@ ENTRY(nmi)
 	movq	%cr3, %rax
 	pushq	%rax
 #ifdef CONFIG_KAISER_REAL_SWITCH
-	andq	$(~0x1000), %rax
+	andq	$(~KAISER_SHADOW_PGD_OFFSET), %rax
 #endif
 	movq	%rax, %cr3
 #endif
@@ -1561,7 +1561,7 @@ end_repeat_nmi:
 	movq	%cr3, %rax
 	pushq	%rax
 #ifdef CONFIG_KAISER_REAL_SWITCH
-	andq	$(~0x1000), %rax
+	andq	$(~KAISER_SHADOW_PGD_OFFSET), %rax
 #endif
 	movq	%rax, %cr3
 #endif
diff --git a/arch/x86/include/asm/kaiser.h b/arch/x86/include/asm/kaiser.h
index 7394ba9f9951..051acf678cda 100644
--- a/arch/x86/include/asm/kaiser.h
+++ b/arch/x86/include/asm/kaiser.h
@@ -13,13 +13,16 @@
  * A minimalistic kernel mapping holds the parts needed to be mapped in user
  * mode, such as the entry/exit functions of the user space, or the stacks.
  */
+
+#define KAISER_SHADOW_PGD_OFFSET 0x1000
+
 #ifdef __ASSEMBLY__
 #ifdef CONFIG_KAISER
 
 .macro _SWITCH_TO_KERNEL_CR3 reg
 movq %cr3, \reg
 #ifdef CONFIG_KAISER_REAL_SWITCH
-andq $(~0x1000), \reg
+andq $(~KAISER_SHADOW_PGD_OFFSET), \reg
 #endif
 movq \reg, %cr3
 .endm
@@ -27,7 +30,7 @@ movq \reg, %cr3
 .macro _SWITCH_TO_USER_CR3 reg
 movq %cr3, \reg
 #ifdef CONFIG_KAISER_REAL_SWITCH
-orq $(0x1000), \reg
+orq $(KAISER_SHADOW_PGD_OFFSET), \reg
 #endif
 movq \reg, %cr3
 .endm