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Re: [PATCH 0/7] via-ide: fixes and improvements

From: Mark Cave-Ayland
Subject: Re: [PATCH 0/7] via-ide: fixes and improvements
Date: Sat, 14 Mar 2020 09:15:28 +0000
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.5.0

On 13/03/2020 17:57, John Snow wrote:

> On 3/13/20 4:24 AM, Mark Cave-Ayland wrote:
>> Following on from the earlier thread "Implement "non 100% native mode"
>> in via-ide", here is an updated patchset based upon the test cases
>> sent to me off-list.
>> The VIA IDE controller is similar to early versions of the PIIX
>> controller in that the primary and secondary IDE channels are hardwired
>> to IRQs 14 and 15 respectively. Guest OSs typically handle this by
>> either switching the controller to legacy mode, or using native mode and
>> using a combination of PCI device/vendor ID and/or checking various
>> registers in PCI configuration space to detect this condition and apply
>> a special fixed IRQ 14/15 routing.
>> This patchset effectively updates the VIA IDE PCI device to follow the
>> behaviour in the datasheet in two ways: fixing some PCI configuration
>> space register defaults and behaviours, and always using legacy IRQ 14/15
>> routing, and once applied allows all our known test images to boot
>> correctly.
>> Signed-off-by: Mark Cave-Ayland <address@hidden>
>> BALATON Zoltan (2):
>>   ide/via: Get rid of via_ide_init()
>>   pci: Honour wmask when resetting PCI_INTERRUPT_LINE
>> Mark Cave-Ayland (5):
>>   via-ide: move registration of VMStateDescription to DeviceClass
>>   via-ide: ensure that PCI_INTERRUPT_LINE is hard-wired to its default
>>     value
>>   via-ide: initialise IDE controller in legacy mode
>>   via-ide: allow guests to write to PCI_CLASS_PROG
>>   via-ide: always use legacy IRQ 14/15 routing
>>  hw/ide/via.c            | 21 +++++----------------
>>  hw/mips/mips_fulong2e.c |  5 ++++-
>>  hw/pci/pci.c            |  5 ++++-
>>  include/hw/ide.h        |  1 -
>>  4 files changed, 13 insertions(+), 19 deletions(-)
> Does this supersede everything else so far? (Except the two cmd646
> related series, four patches total, which are already staged)

Yes, that's correct. It passes all our tests, and even better allows the 
fulong2e CD
image at the link Zoltan posted to boot.

So I believe it's good unless Alexander has any objections?



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