[RFC PATCH v2 01/10] KVM: PPC: Ultravisor: Add PPC_UV config option

[Claudio Carvalho]

From: Anshuman Khandual <khandual at linux.vnet.ibm.com>

CONFIG_PPC_UV adds support for ultravisor.

Signed-off-by: Anshuman Khandual <khandual at linux.vnet.ibm.com>
Signed-off-by: Bharata B Rao <bharata at linux.ibm.com>
Signed-off-by: Ram Pai <linuxram at us.ibm.com>
[Update config help and commit message]
Signed-off-by: Claudio Carvalho <cclaudio at linux.ibm.com>
---
 arch/powerpc/Kconfig | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 2711aac24621..894171c863bc 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -438,6 +438,26 @@ config PPC_TRANSACTIONAL_MEM
        ---help---
          Support user-mode Transactional Memory on POWERPC.
 
+config PPC_UV
+	bool "Ultravisor support"
+	depends on KVM_BOOK3S_HV_POSSIBLE
+	select HMM_MIRROR
+	select HMM
+	select ZONE_DEVICE
+	select MIGRATE_VMA_HELPER
+	select DEV_PAGEMAP_OPS
+	select DEVICE_PRIVATE
+	select MEMORY_HOTPLUG
+	select MEMORY_HOTREMOVE
+	default n
+	help
+	  This option paravirtualizes the kernel to run in POWER platforms that
+	  supports the Protected Execution Facility (PEF). In such platforms,
+	  the ultravisor firmware runs at a privilege level above the
+	  hypervisor.
+
+	  If unsure, say "N".
+
 config LD_HEAD_STUB_CATCH
 	bool "Reserve 256 bytes to cope with linker stubs in HEAD text" if EXPERT
 	depends on PPC64
-- 
2.20.1