linux-kernel - Re: [PATCH 0/2] Drivers: hv: Remove dependencies on guest page size

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Date:   Fri, 4 Oct 2019 11:41:24 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     Michael Kelley <mikelley@...rosoft.com>
Cc:     Himadri Pandya <himadrispandya@...il.com>,
        KY Srinivasan <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "bp@...en8.de" <bp@...en8.de>, "hpa@...or.com" <hpa@...or.com>,
        "x86@...nel.org" <x86@...nel.org>,
        "linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "himadri18.07" <himadri18.07@...il.com>
Subject: Re: [PATCH 0/2] Drivers: hv: Remove dependencies on guest page size

On Wed, Sep 04, 2019 at 11:41:43PM +0000, Michael Kelley wrote:
>From: Himadri Pandya <himadrispandya@...il.com>
>>
>> Hyper-V assumes page size to be 4KB. This might not be the case on ARM64
>> architecture. The first patch in this patchset introduces a hyer-v
>> specific function for allocating a zeroed page which can have a
>> different implementation on ARM64 to address the issue of different
>> guest and host page sizes. The second patch removes dependencies on
>> guest page size in vmbus by using hyper-v specific page symbol and
>> functions.
>>
>> Himadri Pandya (2):
>>   x86: hv: Add function to allocate zeroed page for Hyper-V
>>   Drivers: hv: vmbus: Remove dependencies on guest page size
>>
>>  arch/x86/hyperv/hv_init.c       |  8 ++++++++
>>  arch/x86/include/asm/mshyperv.h |  1 +
>>  drivers/hv/connection.c         | 14 +++++++-------
>>  drivers/hv/vmbus_drv.c          |  6 +++---
>>  4 files changed, 19 insertions(+), 10 deletions(-)
>>
>> --
>> 2.17.1
>
>Thomas -- can you pick up this patch in the x86/hyperv branch of your
>tip tree along with the other patches to fix wrong page size assumptions?

I'll take it through the hyper-v tree, there's a bunch of similar work
queued up there already.

--
Thanks,
Sasha