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Subject: Re: [PATCH v3 1/9] KVM: PPC: Ultravisor: Add PPC_UV config option
From: Leonardo Bras <leonardo@linux.ibm.com>
To: Claudio Carvalho <cclaudio@linux.ibm.com>, linuxppc-dev@ozlabs.org
Date: Fri, 07 Jun 2019 17:11:42 -0300
In-Reply-To: <20190606173614.32090-2-cclaudio@linux.ibm.com>
References: <20190606173614.32090-1-cclaudio@linux.ibm.com>
 <20190606173614.32090-2-cclaudio@linux.ibm.com>
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Cc: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>,
 Michael Anderson <andmike@linux.ibm.com>, Ram Pai <linuxram@us.ibm.com>,
 kvm-ppc@vger.kernel.org, Bharata B Rao <bharata@linux.ibm.com>,
 Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>,
 Anshuman Khandual <khandual@linux.vnet.ibm.com>
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On Thu, 2019-06-06 at 14:36 -0300, Claudio Carvalho wrote:
> From: Anshuman Khandual <khandual@linux.vnet.ibm.com>
>=20
> CONFIG_PPC_UV adds support for ultravisor.
>=20
> 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(+)
>=20
> 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.
>=20
> +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 EXPE=
RT
>  	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.



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