Re: [Xen-devel] [PATCH 3/3] x86/xen: use guest_late_init to detect Xen PVH guest

From: Juergen Gross <jgross@suse.com>
To: Boris Ostrovsky <boris.ostrovsky@oracle.com>,
	Jan Beulich <JBeulich@suse.com>
Cc: len.brown@intel.com, x86@kernel.org, tglx@linutronix.de,
	xen-devel@lists.xenproject.org, mingo@redhat.com,
	pbonzini@redhat.com, rkrcmar@redhat.com, rjw@rjwysocki.net,
	pavel@ucw.cz, kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
	hpa@zytor.com
Subject: Re: [Xen-devel] [PATCH 3/3] x86/xen: use guest_late_init to detect Xen PVH guest
Date: Wed, 8 Nov 2017 15:17:33 +0100	[thread overview]
Message-ID: <8e85c24d-b8ce-10aa-e030-f3d576eb781e@suse.com> (raw)
In-Reply-To: <a59e30ce-0136-aec0-fffc-caa4e61f689f@oracle.com>

On 08/11/17 15:10, Boris Ostrovsky wrote:
> On 11/08/2017 08:36 AM, Juergen Gross wrote:
>>
>> Regarding ACPI tables: current PVH implementation in Linux kernel
>> seems not to make use of the special information presented in the boot
>> information block.
> 
> It will need to do so for dom0 (and, then, for simplicity, for all PVH
> guests).

What about: for all PVH guests booted via the PVH specific boot entry?
A guest booted via the default boot entry won't know it is PVH until
ACPI tables have been scanned.

Juergen