From: Hugh Dickins hughd@google.com
There's a 0x1000 in various places, which looks better with a name.
Signed-off-by: Hugh Dickins hughd@google.com Acked-by: Jiri Kosina jkosina@suse.cz Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org (cherry picked from commit aeda21d77e22fb382c51fd3f6bbb18df69bc032f) Signed-off-by: Pavel Tatashin pasha.tatashin@oracle.com
Conflicts: arch/x86/entry/entry_64.S (not in this tree) arch/x86/kernel/entry_64.S (patched instead of that) --- arch/x86/include/asm/kaiser.h | 7 +++++-- arch/x86/kernel/entry_64.S | 4 ++-- 2 files changed, 7 insertions(+), 4 deletions(-)
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 diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S index 8e4056d4b1d6..5c6c11d9d779 100644 --- a/arch/x86/kernel/entry_64.S +++ b/arch/x86/kernel/entry_64.S @@ -1542,7 +1542,7 @@ 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 @@ -1780,7 +1780,7 @@ 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