From: Gerd Hoffmann <kraxel@redhat.com>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: seabios@seabios.org, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [PATCH v2 02/22] virtio: run drivers in 32bit mode
Date: Wed, 01 Jul 2015 16:03:44 +0200 [thread overview]
Message-ID: <1435759424.4160.50.camel@redhat.com> (raw)
In-Reply-To: <20150701154935-mutt-send-email-mst@redhat.com>
Hi,
> > Not really any more. Switching from 32bit mode back to
> > whatever-was-active-before used to be problematic before we had smm mode
> > support. In theory. Because you can't save/restore the complete x86
> > processor state. In practice we had surprisingly few problems,
> > appearently linux boot loaders simply don't play dirty tricks.
> >
> Interesting. Might not be true for non-linux loaders :)
No problems with modern windows too.
DOS with emm386 being active could be more challenging.
Didn't dig that deep though, and as the ide driver runs
in 16bit mode still there is an easy way around any
isses should they pop up.
> Anyway we support SSM now so all should be well, right?
Yes, with smm this issue is gone.
cheers,
Gerd
next prev parent reply other threads:[~2015-07-01 14:03 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-30 8:38 [Qemu-devel] [PATCH v2 00/22] virtio: add version 1.0 support Gerd Hoffmann
2015-06-30 8:38 ` [Qemu-devel] [PATCH v2 01/22] pci: allow to loop over capabilities Gerd Hoffmann
2015-06-30 8:38 ` [Qemu-devel] [PATCH v2 02/22] virtio: run drivers in 32bit mode Gerd Hoffmann
2015-06-30 14:36 ` [Qemu-devel] [SeaBIOS] " Kevin O'Connor
2015-07-01 7:27 ` Gerd Hoffmann
2015-07-01 8:08 ` [Qemu-devel] " Michael S. Tsirkin
2015-07-01 12:30 ` Gerd Hoffmann
2015-07-01 13:50 ` Michael S. Tsirkin
2015-07-01 13:59 ` Michael S. Tsirkin
2015-07-01 14:03 ` Gerd Hoffmann [this message]
2015-07-01 14:13 ` [Qemu-devel] [SeaBIOS] " Kevin O'Connor
2015-06-30 8:38 ` [Qemu-devel] [PATCH v2 03/22] virtio: add struct vp_device Gerd Hoffmann
2015-06-30 14:33 ` [Qemu-devel] [SeaBIOS] " Kevin O'Connor
2015-07-01 7:34 ` Gerd Hoffmann
2015-06-30 8:38 ` [Qemu-devel] [PATCH v2 04/22] virtio: pass struct pci_device to vp_init_simple Gerd Hoffmann
2015-06-30 8:38 ` [Qemu-devel] [PATCH v2 05/22] virtio: add version 1.0 structs and #defines Gerd Hoffmann
2015-06-30 8:38 ` [Qemu-devel] [PATCH v2 06/22] virtio: add version 0.9.5 struct Gerd Hoffmann
2015-06-30 8:38 ` [Qemu-devel] [PATCH v2 07/22] virtio: find version 1.0 virtio capabilities Gerd Hoffmann
2015-07-01 11:43 ` Michael S. Tsirkin
2015-07-01 12:24 ` Gerd Hoffmann
2015-07-01 12:28 ` Michael S. Tsirkin
2015-07-01 12:49 ` Gerd Hoffmann
2015-07-01 13:49 ` Michael S. Tsirkin
2015-06-30 8:38 ` [Qemu-devel] [PATCH v2 08/22] virtio: create vp_cap struct for legacy bar Gerd Hoffmann
2015-06-30 8:39 ` [Qemu-devel] [PATCH v2 09/22] virtio: add version 0.9.5 struct [fixup] Gerd Hoffmann
2015-06-30 8:39 ` [Qemu-devel] [PATCH v2 10/22] virtio: add read/write functions and macros Gerd Hoffmann
2015-06-30 8:39 ` [Qemu-devel] [PATCH v2 11/22] virtio: make features 64bit, support version 1.0 features Gerd Hoffmann
2015-06-30 8:39 ` [Qemu-devel] [PATCH v2 12/22] virtio: add version 1.0 support to vp_{get, set}_status Gerd Hoffmann
2015-06-30 8:39 ` [Qemu-devel] [PATCH v2 13/22] virtio: add version 1.0 support to vp_get_isr Gerd Hoffmann
2015-06-30 8:39 ` [Qemu-devel] [PATCH v2 14/22] virtio: add version 1.0 support to vp_reset Gerd Hoffmann
2015-06-30 8:39 ` [Qemu-devel] [PATCH v2 15/22] virtio: add version 1.0 support to vp_notify Gerd Hoffmann
2015-06-30 8:39 ` [Qemu-devel] [PATCH v2 16/22] virtio: remove unused vp_del_vq Gerd Hoffmann
2015-06-30 8:39 ` [Qemu-devel] [PATCH v2 17/22] virtio: add version 1.0 support to vp_find_vq Gerd Hoffmann
2015-06-30 8:39 ` [Qemu-devel] [PATCH v2 18/22] virtio-scsi: fix initialization for version 1.0 Gerd Hoffmann
2015-06-30 8:39 ` [Qemu-devel] [PATCH v2 19/22] virtio-blk: " Gerd Hoffmann
2015-06-30 8:39 ` [Qemu-devel] [PATCH v2 20/22] virtio: use version 1.0 if available (flip the big switch) Gerd Hoffmann
2015-06-30 8:39 ` [Qemu-devel] [PATCH v2 21/22] virtio: also probe version 1.0 pci ids Gerd Hoffmann
2015-06-30 8:39 ` [Qemu-devel] [PATCH v2 22/22] virtio: legacy cleanup Gerd Hoffmann
2015-07-01 11:48 ` [Qemu-devel] [PATCH v2 00/22] virtio: add version 1.0 support Michael S. Tsirkin
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