[PATCHv7 13/14] x86: Enable 5-level paging support

Kirill A. Shutemov
2017-06-06T11:31:32Z

Most of things are in place and we can enable support of 5-level paging.

The patch makes XEN_PV dependent on !X86_5LEVEL. XEN_PV is not ready to
work with 5-level paging.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
---
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 de71b6aca0be..881fbbe8296b 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 027987638e98..1be9667bd476 100644
--- a/arch/x86/xen/Kconfig
+++ b/arch/x86/xen/Kconfig
@@ -17,6 +17,7 @@ config XEN_PV
bool "Xen PV guest support"
default y
depends on XEN
+ depends on !X86_5LEVEL
select XEN_HAVE_PVMMU
select XEN_HAVE_VPMU
help
--
2.11.0

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