Re: [PATCH v3 1/9] KVM: PPC: Ultravisor: Add PPC_UV config option

[Claudio Carvalho <cclaudio@linux.ibm.com>]

On 6/7/19 5:11 PM, Leonardo Bras wrote:
>
> On Thu, 2019-06-06 at 14:36 -0300, Claudio Carvalho 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>
>> ---
>>  arch/powerpc/Kconfig | 20 ++++++++++++++++++++
>>  1 file changed, 20 insertions(+)
>>
>> diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
>> index 8c1c636308c8..276c1857c335 100644
>> --- a/arch/powerpc/Kconfig
>> +++ b/arch/powerpc/Kconfig
>> @@ -439,6 +439,26 @@ 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
> Maybe this patch should be the last of the series, as it may cause some
> bisect trouble to have this option enabled while missing some of the
> patches.

Thanks Leonardo. I changed that for the next version.

Claudio