From: "Michael S. Tsirkin" <mst@redhat.com>
To: Anthony Liguori <anthony@codemonkey.ws>
Cc: alex.williamson@redhat.com, jan.kiszka@siemens.com,
Jason Baron <jbaron@redhat.com>,
qemu-devel@nongnu.org, agraf@suse.de, yamahata@valinux.co.jp,
juzhang@redhat.com, kevin@koconnor.net, avi@redhat.com,
mkletzan@redhat.com, lcapitulino@redhat.com, afaerber@suse.de,
armbru@redhat.com
Subject: Re: [Qemu-devel] [PATCH 11/25] q35: Introduce q35 pc based chipset emulator
Date: Sun, 16 Sep 2012 18:14:34 +0300 [thread overview]
Message-ID: <20120916151433.GA27428@redhat.com> (raw)
In-Reply-To: <87k3vunhvq.fsf@codemonkey.ws>
On Sun, Sep 16, 2012 at 09:48:25AM -0500, Anthony Liguori wrote:
> > I wonder if it's possible for q35 to have no devices
> > at all in the default machine and have it
> > fully qualified by -device switches?
> >
> > I envision -M qemu-1.3 switch that does exactly that,
> > so that machine type only handles things like
> > cross version compatibility.
>
> It's more than just "no devices". It's a matter of proper modeling of
> the chipset, the super I/O chip, and peripherals.
OK I guess the answer us no then.
However, if you look at hw/pc_piix.c you see a bunch of version
compatiblity code. Other systems do not have this I guess
mostly because they worry less about compatibility ATM.
Looks like if we start bothering about compatibility
for both q35 and piix we'll have a lot of
code duplication between the two.
This problem is not limited to pc though,
I expect it with time we'll have it for power and arm.
I wonder what the solution is. Move compat
code out of pc_piix, making it non pc specific?
--
MST
next prev parent reply other threads:[~2012-09-16 15:13 UTC|newest]
Thread overview: 74+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-13 20:12 [Qemu-devel] [PATCH 00/25] q35 series take #1 Jason Baron
2012-09-13 20:12 ` [Qemu-devel] [PATCH 01/25] pci: pci capability must be in PCI space Jason Baron
2012-09-13 20:12 ` [Qemu-devel] [PATCH 02/25] pci: add opaque argument to pci_map_irq_fn Jason Baron
2012-09-14 16:32 ` Alex Williamson
2012-09-13 20:12 ` [Qemu-devel] [PATCH 03/25] pci: introduce pci_swizzle_map_irq_fn() for standardized interrupt pin swizzle Jason Baron
2012-09-13 20:12 ` [Qemu-devel] [PATCH 05/25] pc, pc_piix: split out pc nic initialization Jason Baron
2012-09-13 20:12 ` [Qemu-devel] [PATCH 04/25] ahci: add ide device initialization helper Jason Baron
2012-09-21 14:05 ` Markus Armbruster
2012-09-21 19:37 ` Jason Baron
2012-09-24 16:52 ` Markus Armbruster
2012-09-24 17:23 ` Jason Baron
2012-09-26 8:15 ` Markus Armbruster
2012-09-26 10:43 ` Kevin Wolf
2012-09-27 17:59 ` Jason Baron
2012-09-13 20:12 ` [Qemu-devel] [PATCH 07/25] pc/piix_pci: factor out smram/pam logic Jason Baron
2012-09-14 18:52 ` Blue Swirl
2012-09-13 20:12 ` [Qemu-devel] [PATCH 06/25] pc: Move ioapic_init() from pc_piix.c to pc.c Jason Baron
2012-09-13 20:12 ` [Qemu-devel] [PATCH 08/25] pci_ids: add intel 82801BA pci-to-pci bridge id and PCI_CLASS_SERIAL_SMBUS Jason Baron
2012-09-13 20:12 ` [Qemu-devel] [PATCH 09/25] pcie: pass pcie window size to pcie_host_mmcfg_update() Jason Baron
2012-09-13 20:12 ` [Qemu-devel] [PATCH 10/25] pcie: Convert PCIExpressHost to use the QOM Jason Baron
2012-09-15 15:16 ` Andreas Färber
2012-09-13 20:12 ` [Qemu-devel] [PATCH 11/25] q35: Introduce q35 pc based chipset emulator Jason Baron
2012-09-14 7:02 ` Paolo Bonzini
2012-09-14 7:37 ` Gerd Hoffmann
2012-09-14 14:11 ` Jason Baron
2012-09-18 21:28 ` Alex Williamson
2012-09-14 12:26 ` Michael S. Tsirkin
2012-09-14 15:20 ` Jason Baron
2012-09-15 18:14 ` Michael S. Tsirkin
2012-09-16 14:48 ` Anthony Liguori
2012-09-16 15:14 ` Michael S. Tsirkin [this message]
2012-09-13 20:12 ` [Qemu-devel] [PATCH 12/25] q35: Re-base q35 to 1.2 Jason Baron
2012-09-14 19:07 ` Blue Swirl
2012-09-13 20:12 ` [Qemu-devel] [PATCH 13/25] q35: Suppress SMM BIOS initialization under KVM Jason Baron
2012-09-13 20:12 ` [Qemu-devel] [PATCH 14/25] q35: Fix non-PCI IRQ processing in ich9_lpc_update_apic Jason Baron
2012-09-13 20:12 ` [Qemu-devel] [PATCH 16/25] pci: Add class 0xc05 as 'SMBus' Jason Baron
2012-09-14 7:04 ` Paolo Bonzini
2012-09-14 14:24 ` Jason Baron
2012-09-13 20:12 ` [Qemu-devel] [PATCH 15/25] q35: smbus: Remove PCI_STATUS_SIG_SYSTEM_ERROR and PCI_STATUS_DETECTED_PARITY from w1cmask Jason Baron
2012-09-13 20:12 ` [Qemu-devel] [PATCH 17/25] q35: Add kvmclock support Jason Baron
2012-09-13 20:12 ` [Qemu-devel] [PATCH 18/25] q35: Fix irr initialization for slots 25..31 Jason Baron
2012-09-14 7:05 ` Paolo Bonzini
2012-09-14 14:28 ` Jason Baron
2012-09-13 20:12 ` [Qemu-devel] [PATCH 19/25] ahci: add migration support Jason Baron
2012-09-14 8:38 ` Juan Quintela
2012-09-13 20:12 ` [Qemu-devel] [PATCH 20/25] pcie: drop version_id field for live migration Jason Baron
2012-09-13 20:12 ` [Qemu-devel] [PATCH 21/25] pcie_aer: clear cmask for Advanced Error Interrupt Message Number Jason Baron
2012-09-13 20:12 ` [Qemu-devel] [PATCH 22/25] ahci: properly reset PxCMD on HBA reset Jason Baron
2012-09-13 20:12 ` [Qemu-devel] [PATCH 23/25] q35: add acpi-based pci hotplug Jason Baron
2012-09-14 18:56 ` Blue Swirl
2012-09-13 20:12 ` [Qemu-devel] [PATCH 25/25] q35: automatically load the q35 dsdt table Jason Baron
2012-09-14 7:08 ` Paolo Bonzini
2012-09-14 7:25 ` Gerd Hoffmann
2012-09-14 7:34 ` Paolo Bonzini
2012-09-13 20:12 ` [Qemu-devel] [PATCH 24/25] Add a fallback bios file search, if -L fails Jason Baron
2012-09-14 7:09 ` Paolo Bonzini
2012-09-14 10:54 ` Peter Maydell
2012-09-14 19:15 ` Blue Swirl
2012-09-13 22:29 ` [Qemu-devel] [PATCH 00/25] q35 series take #1 Alexander Graf
2012-09-14 13:50 ` Jason Baron
2012-09-14 13:56 ` Alexander Graf
2012-09-14 14:08 ` Jason Baron
2012-09-14 14:12 ` Alexander Graf
2012-09-14 15:37 ` Kevin Wolf
2012-09-14 15:14 ` Isaku Yamahata
2012-09-14 15:23 ` Jason Baron
2012-09-14 17:34 ` Isaku Yamahata
2012-09-14 19:01 ` Jason Baron
2012-09-15 0:24 ` Isaku Yamahata
2012-09-15 11:33 ` Paolo Bonzini
2012-09-15 17:35 ` Michael S. Tsirkin
2012-09-15 18:05 ` Michael S. Tsirkin
2012-09-15 17:40 ` Michael S. Tsirkin
2012-09-15 18:02 ` Michael S. Tsirkin
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