netdev - RE: [PATCH net-next] net: mana: Add a driver for Microsoft Azure Network Adapter (MANA)

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Message-ID: <DM5PR2101MB0934D037F5541B0FA449FA34CA759@DM5PR2101MB0934.namprd21.prod.outlook.com>
Date:   Wed, 7 Apr 2021 14:34:01 +0000
From:   Haiyang Zhang <haiyangz@...rosoft.com>
To:     Wei Liu <wei.liu@...nel.org>, Dexuan Cui <decui@...rosoft.com>
CC:     "davem@...emloft.net" <davem@...emloft.net>,
        "kuba@...nel.org" <kuba@...nel.org>,
        KY Srinivasan <kys@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Wei Liu <liuwe@...rosoft.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>
Subject: RE: [PATCH net-next] net: mana: Add a driver for Microsoft Azure
 Network Adapter (MANA)



> -----Original Message-----
> From: Wei Liu <wei.liu@...nel.org>
> Sent: Wednesday, April 7, 2021 9:17 AM
> To: Dexuan Cui <decui@...rosoft.com>
> Cc: davem@...emloft.net; kuba@...nel.org; KY Srinivasan
> <kys@...rosoft.com>; Haiyang Zhang <haiyangz@...rosoft.com>; Stephen
> Hemminger <sthemmin@...rosoft.com>; wei.liu@...nel.org; Wei Liu
> <liuwe@...rosoft.com>; netdev@...r.kernel.org; linux-
> kernel@...r.kernel.org; linux-hyperv@...r.kernel.org
> Subject: Re: [PATCH net-next] net: mana: Add a driver for Microsoft Azure
> Network Adapter (MANA)
> 
> On Tue, Apr 06, 2021 at 04:23:21PM -0700, Dexuan Cui wrote:
> [...]
> > +config MICROSOFT_MANA
> > +	tristate "Microsoft Azure Network Adapter (MANA) support"
> > +	default m
> > +	depends on PCI_MSI
> > +	select PCI_HYPERV
> 
> OOI which part of the code requires PCI_HYPERV?
> 
> Asking because I can't immediately find code that looks to be Hyper-V
> specific (searching for vmbus etc). This device looks like any other PCI devices
> to me.

It depends on the VF nic's PCI config space which is presented by the pci_hyperv driver.

Thanks,
- Haiyang