Re: [Qemu-devel] [V4 0/4] AMD IOMMU

[Jan Kiszka]

On 2016-02-17 20:09, David Kiarie wrote:
> Hello there,
> 
> This is v5 of AMD IOMMU patches that fixes the issues mentioned in v4 except 
> I fail to see the endian-ness issues Michael mentioned.
> 
> I also stripped PIIX AMD IOMMU support since I added an MSI interrupt. One of 
> the patches has a conflict with current master but it this is mergable I 
> could quickly send a clean patch.

I've just made it compile over master, but something is broken, at
least in the PCI capability layout:

# lspci -vv -s 00:04.0
00:04.0 Generic system peripheral [0806]: Advanced Micro Devices [AMD] Device 
0020
        Subsystem: Red Hat, Inc Device 1100
        Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR+ FastB2B- DisINTx-
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- >SERR- <PERR- INTx-
        Capabilities: [64] HyperTransport: Slave or Primary Interface
                Command: BaseUnitID=0 UnitCnt=0 MastHost- DefDir-
                Link Control 0: CFlE- CST- CFE- <LkFail- Init- EOC- TXO- 
<CRCErr=0
                Link Config 0: MLWI=8bit MLWO=8bit LWI=8bit LWO=8bit
                Link Control 1: CFlE- CST- CFE- <LkFail- Init- EOC- TXO- 
<CRCErr=0
                Link Config 1: MLWI=8bit MLWO=8bit LWI=8bit LWO=8bit
                Revision ID: 0.00
        Capabilities: [60] MSI: Enable- Count=1/1 Maskable- 64bit-
                Address: 00006008  Data: 0000
        Capabilities: [5c] HyperTransport: Slave or Primary Interface
                Command: BaseUnitID=0 UnitCnt=0 MastHost- DefDir-
                Link Control 0: CFlE- CST+ CFE- <LkFail- Init- EOC- TXO- 
<CRCErr=c
                Link Config 0: MLWI=8bit MLWO=8bit LWI=8bit LWO=8bit
                Link Control 1: CFlE- CST- CFE+ <LkFail- Init- EOC- TXO- 
<CRCErr=0
                Link Config 1: MLWI=8bit MLWO=8bit LWI=8bit LWO=8bit
                Revision ID: 0.00
        Capabilities: [58] MSI: Enable- Count=1/1 Maskable- 64bit-
                Address: 00005808  Data: 5c05
        Capabilities: [40] <chain broken>


Two times MSI, and a broken chain. At least unusual is also the
reverted ordering. Please examine and fix.

Thanks,
Jan

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