From:   Thomas Gleixner <tglx@linutronix.de>
To:     Dave Jiang <dave.jiang@intel.com>, Jason Gunthorpe <jgg@nvidia.com>
Cc:     Logan Gunthorpe <logang@deltatee.com>,
        LKML <linux-kernel@vger.kernel.org>,
        Bjorn Helgaas <helgaas@kernel.org>,
        Marc Zygnier <maz@kernel.org>,
        Alex Williamson <alex.williamson@redhat.com>,
        Kevin Tian <kevin.tian@intel.com>,
        Megha Dey <megha.dey@intel.com>,
        Ashok Raj <ashok.raj@intel.com>, linux-pci@vger.kernel.org,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Jon Mason <jdmason@kudzu.us>, Allen Hubbe <allenbh@gmail.com>,
        linux-ntb@googlegroups.com, linux-s390@vger.kernel.org,
        Heiko Carstens <hca@linux.ibm.com>,
        Christian Borntraeger <borntraeger@de.ibm.com>, x86@kernel.org,
        Joerg Roedel <jroedel@suse.de>,
        iommu@lists.linux-foundation.org
Subject: Re: [patch 21/32] NTB/msi: Convert to msi_on_each_desc()
In-Reply-To: <0eab4c0e-c672-1138-2d95-3c9bee9ecdb1@intel.com>
References: <20211126230957.239391799@linutronix.de>
 <20211126232735.547996838@linutronix.de>
 <7daba0e2-73a3-4980-c3a5-a71f6b597b22@deltatee.com> <874k7ueldt.ffs@tglx>
 <6ba084d6-2b26-7c86-4526-8fcd3d921dfd@deltatee.com> <87ilwacwp8.ffs@tglx>
 <d6f13729-1b83-fa7d-3f0d-98d4e3f7a2aa@deltatee.com> <87v909bf2k.ffs@tglx>
 <20211130202800.GE4670@nvidia.com> <87o861banv.ffs@tglx>
 <20211201001748.GF4670@nvidia.com> <87mtlkaauo.ffs@tglx>
 <8c2262ba-173e-0007-bc4c-94ec54b2847d@intel.com> <87pmqg88xq.ffs@tglx>
 <df00b87e-00dc-d998-8b64-46b16dba46eb@intel.com> <87k0go8432.ffs@tglx>
 <f4cc305b-a329-6d27-9fca-b74ebc9fa0c1@intel.com> <878rx480fk.ffs@tglx>
 <45302c9d-f7a0-5a47-d0be-127d0dea45fb@intel.com> <875ys87zl5.ffs@tglx>
 <0eab4c0e-c672-1138-2d95-3c9bee9ecdb1@intel.com>
Date:   Thu, 02 Dec 2021 00:57:10 +0100
Message-ID: <87tufr7uax.ffs@tglx>
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dave,

On Wed, Dec 01 2021 at 15:53, Dave Jiang wrote:
> On 12/1/2021 3:03 PM, Thomas Gleixner wrote:
>> This still depends on how this overall discussion about representation
>> of all of this stuff is resolved.
>>
>>>> What needs a subdevice to expose?
>> Can you answer that too please?
>
> Sorry. So initial version of the IDXD sub-device is represented with a 
> single queue. It needs a command irq (emulated) and a completion irq 
> that is backed by a device vector (currently IMS).

thanks for clarification! Let me think about it some more.

       tglx