Re: [Xen-devel] [edk2-devel] [PATCH v5 20/35] OvmfPkg/XenPlatformPei: Introduce XenPvhDetected

From: Laszlo Ersek <lersek@redhat.com>
To: devel@edk2.groups.io, anthony.perard@citrix.com
Cc: Jordan Justen <jordan.l.justen@intel.com>,
	Julien Grall <julien.grall@arm.com>,
	Ard Biesheuvel <ard.biesheuvel@linaro.org>,
	xen-devel@lists.xenproject.org
Subject: Re: [Xen-devel] [edk2-devel] [PATCH v5 20/35] OvmfPkg/XenPlatformPei: Introduce XenPvhDetected
Date: Thu, 15 Aug 2019 10:54:29 +0200	[thread overview]
Message-ID: <5650925a-3a21-6dbe-0576-49b21143fb3c@redhat.com> (raw)
In-Reply-To: <20190813113119.14804-21-anthony.perard@citrix.com>

On 08/13/19 13:31, Anthony PERARD wrote:
> XenPvhDetected() can be used to figure out if OVMF has started via the
> Xen PVH entry point.
> 
> Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=1689
> Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
> Acked-by: Laszlo Ersek <lersek@redhat.com>
> ---
> 
> Notes:
>     v5:
>     - in XenPvhDetected, check mXenInfo.HyperPages instead of .VersionMajor

Right, and that seems to address

http://mid.mail-archive.com/20190808104354.wcl2vicpmvbl3rlz@Air-de-Roger
https://edk2.groups.io/g/devel/message/45159

So my ACK stands.

Thanks
Laszlo

>  OvmfPkg/XenPlatformPei/Platform.h |  5 +++++
>  OvmfPkg/XenPlatformPei/Xen.c      | 13 +++++++++++++
>  2 files changed, 18 insertions(+)
> 
> diff --git a/OvmfPkg/XenPlatformPei/Platform.h b/OvmfPkg/XenPlatformPei/Platform.h
> index 4a80057bdc..db9a62572f 100644
> --- a/OvmfPkg/XenPlatformPei/Platform.h
> +++ b/OvmfPkg/XenPlatformPei/Platform.h
> @@ -99,6 +99,11 @@ XenHvmloaderDetected (
>    VOID
>    );
>  
> +BOOLEAN
> +XenPvhDetected (
> +  VOID
> +  );
> +
>  VOID
>  AmdSevInitialize (
>    VOID
> diff --git a/OvmfPkg/XenPlatformPei/Xen.c b/OvmfPkg/XenPlatformPei/Xen.c
> index 29b42b746c..f26f0e56dd 100644
> --- a/OvmfPkg/XenPlatformPei/Xen.c
> +++ b/OvmfPkg/XenPlatformPei/Xen.c
> @@ -214,6 +214,19 @@ XenHvmloaderDetected (
>    return (mXenHvmloaderInfo != NULL);
>  }
>  
> +BOOLEAN
> +XenPvhDetected (
> +  VOID
> +  )
> +{
> +  //
> +  // This function should only be used after XenConnect
> +  //
> +  ASSERT (mXenInfo.HyperPages != NULL);
> +
> +  return mXenHvmloaderInfo == NULL;
> +}
> +
>  VOID
>  XenPublishRamRegions (
>    VOID
> 

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