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Subject: Re: [RFC PATCH v4 1/7] xen/pvh: Split CONFIG_XEN_PVH into CONFIG_PVH
 and CONFIG_XEN_PVH
To:     Maran Wilson <maran.wilson@oracle.com>, pbonzini@redhat.com,
        jgross@suse.com, roger.pau@citrix.com, andrew.cooper3@citrix.com,
        hch@infradead.org, JBeulich@suse.com, x86@kernel.org,
        xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org,
        kvm@vger.kernel.org
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        rkrcmar@redhat.com, jpoimboe@redhat.com, bp@suse.de,
        kirill.shutemov@linux.intel.com, thomas.lendacky@amd.com,
        luto@kernel.org, dave.hansen@linux.intel.com, davem@davemloft.net,
        gregkh@linuxfoundation.org, mchehab@kernel.org,
        linus.walleij@linaro.org, rdunlap@infradead.org
References: <1519842483-8887-1-git-send-email-maran.wilson@oracle.com>
 <1519842483-8887-2-git-send-email-maran.wilson@oracle.com>
From:   Boris Ostrovsky <boris.ostrovsky@oracle.com>
Message-ID: <5be04d96-aa10-a022-2597-f7f40138f8f8@oracle.com>
Date:   Thu, 1 Mar 2018 10:02:35 -0500
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On 02/28/2018 01:27 PM, Maran Wilson wrote:
> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> index eb7f43f23521..fa7cd0305125 100644
> --- a/arch/x86/Kconfig
> +++ b/arch/x86/Kconfig
> @@ -791,6 +791,14 @@ config KVM_GUEST
>  	  underlying device model, the host provides the guest with
>  	  timing infrastructure such as time of day, and system time
>  
> +config PVH
> +	bool "Support for running PVH guests"
> +	depends on KVM_GUEST || XEN


Not sure about XEN part. PVH is selected by XEN_PVH for Xen.

What about introducing KVM_GUEST_PVH that will select PVH and then drop
dependency here?


-boris

> +	def_bool n
> +	---help---
> +	  This option enables the PVH entry point for guest virtual machines
> +	  as specified in the x86/HVM direct boot ABI.
> +
>  


> diff --git a/arch/x86/xen/Kconfig b/arch/x86/xen/Kconfig
> index f605825a04ab..021c8591c3c0 100644
> --- a/arch/x86/xen/Kconfig
> +++ b/arch/x86/xen/Kconfig
> @@ -77,8 +77,9 @@ config XEN_DEBUG_FS
>  	  Enabling this option may incur a significant performance overhead.
>  
>  config XEN_PVH
> -	bool "Support for running as a PVH guest"
> +	bool "Support for running as a Xen PVH guest"
>  	depends on XEN && XEN_PVHVM && ACPI
>  	# Pre-built page tables are not ready to handle 5-level paging.
>  	depends on !X86_5LEVEL
> +	select PVH
>  	def_bool n