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From: "Michael S. Tsirkin" <mst@redhat.com>
To: David Gibson <david@gibson.dropbear.id.au>
Cc: pair@us.ibm.com, "Daniel P. Berrangé" <berrange@redhat.com>,
	aik@ozlabs.ru, groug@kaod.org, qemu-devel@nongnu.org,
	paulus@samba.org, clg@kaod.org, mdroth@us.ibm.com,
	qemu-ppc@nongnu.org
Subject: Re: [PATCH v3 1/2] spapr: Disable legacy virtio devices for pseries-5.0 and later
Date: Wed, 11 Mar 2020 03:11:16 -0400	[thread overview]
Message-ID: <20200311030812-mutt-send-email-mst@kernel.org> (raw)
In-Reply-To: <20200311005857.GS660117@umbus.fritz.box>

On Wed, Mar 11, 2020 at 11:58:57AM +1100, David Gibson wrote:
> Note that several things that I believe are now in the PCIe spec, but
> really derive more from PC legacy considerations, don't apply at all
> for PAPR.  e.g. there's no meaningful distinction between integrated
> and slotted devices, multiple independent host bridges is routine and
> doesn't require any (virtual) hardware visible domain numbers.

Domain numbers are a Linux thing, not a PCIe thing. On x86 they come
from ACPI segment numbers. As such they aren't usually hardware
visible on x86, they are supplied by firmware.

-- 
MST



  reply	other threads:[~2020-03-11  7:12 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-05  4:30 [PATCH v3 0/2] spapr: Use vIOMMU translation for virtio by default David Gibson
2020-03-05  4:30 ` [PATCH v3 1/2] spapr: Disable legacy virtio devices for pseries-5.0 and later David Gibson
2020-03-05 10:31   ` Greg Kurz
2020-03-10  9:43     ` Greg Kurz
2020-03-10  9:57       ` Michael S. Tsirkin
2020-03-10 11:03       ` Michael S. Tsirkin
2020-03-10 12:24         ` Greg Kurz
2020-03-10 11:56   ` Daniel P. Berrangé
2020-03-11  0:58     ` David Gibson
2020-03-11  7:11       ` Michael S. Tsirkin [this message]
2020-03-12  1:14         ` David Gibson
2020-03-12  6:41           ` Michael S. Tsirkin
2020-03-05  4:30 ` [PATCH v3 2/2] spapr: Enable virtio iommu_platform=on by default David Gibson
2020-03-05 11:59   ` Greg Kurz
2020-03-10 10:43     ` Greg Kurz
2020-03-12  4:14       ` Alexey Kardashevskiy
2020-03-12  8:02         ` Greg Kurz
2020-03-10 11:43 ` Upstream QEMU guest support policy ? Re: [PATCH v3 0/2] spapr: Use vIOMMU translation for virtio " Daniel P. Berrangé
2020-03-11  1:12   ` David Gibson
2020-03-11  7:33     ` Michael S. Tsirkin
2020-03-12  1:10       ` David Gibson
2020-03-12  6:32         ` Michael S. Tsirkin
2020-03-16  3:06           ` David Gibson
2020-03-11 10:01     ` Daniel P. Berrangé
2020-03-11 11:48       ` Michael S. Tsirkin
2020-03-12  1:09         ` David Gibson
2020-03-12  1:08       ` David Gibson
2020-03-12  9:47         ` Daniel P. Berrangé
2020-03-11 17:19 ` Greg Kurz

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