[PATCH 7/8] x86: Enable 5-level paging support
From: Kirill A. Shutemov
Date: Thu Apr 06 2017 - 10:04:00 EST
Most of things are in place and we can enable support of 5-level paging.
Enabling XEN with 5-level paging requires more work. The patch makes XEN
dependent on !X86_5LEVEL.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
---
arch/x86/Kconfig | 5 +++++
arch/x86/xen/Kconfig | 1 +
2 files changed, 6 insertions(+)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 4e153e93273f..7a76dcac357e 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -318,6 +318,7 @@ config FIX_EARLYCON_MEM
config PGTABLE_LEVELS
int
+ default 5 if X86_5LEVEL
default 4 if X86_64
default 3 if X86_PAE
default 2
@@ -1390,6 +1391,10 @@ config X86_PAE
has the cost of more pagetable lookup overhead, and also
consumes more pagetable space per process.
+config X86_5LEVEL
+ bool "Enable 5-level page tables support"
+ depends on X86_64
+
config ARCH_PHYS_ADDR_T_64BIT
def_bool y
depends on X86_64 || X86_PAE
diff --git a/arch/x86/xen/Kconfig b/arch/x86/xen/Kconfig
index 76b6dbd627df..b90d481ce5a1 100644
--- a/arch/x86/xen/Kconfig
+++ b/arch/x86/xen/Kconfig
@@ -5,6 +5,7 @@
config XEN
bool "Xen guest support"
depends on PARAVIRT
+ depends on !X86_5LEVEL
select PARAVIRT_CLOCK
select XEN_HAVE_PVMMU
select XEN_HAVE_VPMU
--
2.11.0