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Re: [PATCH v3 0/4] ide: implement simple legacy/native mode switching fo
From: |
Kevin Wolf |
Subject: |
Re: [PATCH v3 0/4] ide: implement simple legacy/native mode switching for PCI IDE controllers |
Date: |
Thu, 16 Nov 2023 14:48:01 +0100 |
Am 16.11.2023 um 11:33 hat Mark Cave-Ayland geschrieben:
> This series adds a simple implementation of legacy/native mode switching for
> PCI
> IDE controllers and updates the via-ide device to use it.
>
> The approach I take here is to add a new pci_ide_update_mode() function which
> handles
> management of the PCI BARs and legacy IDE ioports for each mode to avoid
> exposing
> details of the internal logic to individual PCI IDE controllers.
>
> As noted in [1] this is extracted from a local WIP branch I have which
> contains
> further work in this area. However for the moment I've kept it simple (and
> restricted it to the via-ide device) which is good enough for Zoltan's PPC
> images whilst paving the way for future improvements after 8.2.
>
> Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
>
> [1] https://lists.gnu.org/archive/html/qemu-devel/2023-10/msg05403.html
>
> v3:
> - Rebase onto master
> - Move ide_portio_list[] and ide_portio_list2[] to IDE core to prevent
> duplication in
> hw/ide/pci.c
> - Don't zero BARs when switching from native mode to legacy mode, instead
> always force
> them to read zero as suggested in the PCI IDE specification (note: this
> also appears
> to fix the fuloong2e machine booting from IDE)
> - Add comments in pci_ide_update_mode() suggested by Kevin
> - Drop the existing R-B and T-B tags: whilst this passes my local tests, the
> behaviour
> around zero BARs feels different enough here
Thanks, applied to the block branch.
Kevin
Re: [PATCH v3 0/4] ide: implement simple legacy/native mode switching for PCI IDE controllers, BALATON Zoltan, 2023/11/19