Re: [PATCH v5 7/7] KVM: PPC: Ultravisor: Add PPC_UV config option

[janani <janani@linux.ibm.com>]

On 2019-07-09 05:25, Bharata B Rao wrote:
> From: Anshuman Khandual <khandual@linux.vnet.ibm.com>
> 
> CONFIG_PPC_UV adds support for ultravisor.
> 
> Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
> Signed-off-by: Bharata B Rao <bharata@linux.ibm.com>
> Signed-off-by: Ram Pai <linuxram@us.ibm.com>
> [ Update config help and commit message ]
> Signed-off-by: Claudio Carvalho <cclaudio@linux.ibm.com>
  Reviewed-by: Janani Janakiraman <janani@linux.ibm.com>
> ---
>  arch/powerpc/Kconfig | 20 ++++++++++++++++++++
>  1 file changed, 20 insertions(+)
> 
> diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
> index f0e5b38d52e8..20c6c213d2be 100644
> --- a/arch/powerpc/Kconfig
> +++ b/arch/powerpc/Kconfig
> @@ -440,6 +440,26 @@ 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