linux-kernel - RE: [PATCH v3 07/11] hv_netvsc: Use HV_HYP_PAGE

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Date:   Sat, 12 Sep 2020 19:36:13 +0000
From:   Michael Kelley <mikelley@...rosoft.com>
To:     Boqun Feng <boqun.feng@...il.com>,
        "linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>,
        "linux-input@...r.kernel.org" <linux-input@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
CC:     KY Srinivasan <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Wei Liu <wei.liu@...nel.org>, Jiri Kosina <jikos@...nel.org>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        "will@...nel.org" <will@...nel.org>,
        "ardb@...nel.org" <ardb@...nel.org>,
        "arnd@...db.de" <arnd@...db.de>,
        "catalin.marinas@....com" <catalin.marinas@....com>,
        "Mark.Rutland@....com" <Mark.Rutland@....com>,
        "maz@...nel.org" <maz@...nel.org>
Subject: RE: [PATCH v3 07/11] hv_netvsc: Use HV_HYP_PAGE_SIZE for Hyper-V
 communication

From: Boqun Feng <boqun.feng@...il.com> Sent: Thursday, September 10, 2020 7:35 AM
> 
> When communicating with Hyper-V, HV_HYP_PAGE_SIZE should be used since
> that's the page size used by Hyper-V and Hyper-V expects all
> page-related data using the unit of HY_HYP_PAGE_SIZE, for example, the
> "pfn" in hv_page_buffer is actually the HV_HYP_PAGE (i.e. the Hyper-V
> page) number.
> 
> In order to support guest whose page size is not 4k, we need to make
> hv_netvsc always use HV_HYP_PAGE_SIZE for Hyper-V communication.
> 
> Signed-off-by: Boqun Feng <boqun.feng@...il.com>
> ---
>  drivers/net/hyperv/netvsc.c       |  2 +-
>  drivers/net/hyperv/netvsc_drv.c   | 46 +++++++++++++++----------------
>  drivers/net/hyperv/rndis_filter.c | 13 ++++-----
>  3 files changed, 30 insertions(+), 31 deletions(-)
> 

Reviewed-by: Michael Kelley <mikelley@...rosoft.com>