linux-kernel - Re: [PATCH 3/3] Drivers: hv: utils: Support TimeSync version 4.0 protocol samples.

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Message-ID: <20160914125710.GA12274@aepfle.de>
Date:   Wed, 14 Sep 2016 14:57:10 +0200
From:   Olaf Hering <olaf@...fle.de>
To:     "Alex Ng (LIS)" <alexng@...rosoft.com>
Cc:     KY Srinivasan <kys@...rosoft.com>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "devel@...uxdriverproject.org" <devel@...uxdriverproject.org>,
        "apw@...onical.com" <apw@...onical.com>,
        "vkuznets@...hat.com" <vkuznets@...hat.com>,
        "jasowang@...hat.com" <jasowang@...hat.com>,
        "leann.ogasawara@...onical.com" <leann.ogasawara@...onical.com>
Subject: Re: [PATCH 3/3] Drivers: hv: utils: Support TimeSync version 4.0
 protocol samples.

On Tue, Sep 13, Alex Ng (LIS) wrote:

> > On Thu, Sep 08, kys@...hange.microsoft.com wrote:
> > Perhaps a better approach would be to list the known existing hosts and use
> > the new protocol for upcoming, unknown hosts via 'default:'.
> This is a good idea. I will create another patch that addresses this.

I think this variant would cover upcoming hosts for an old kernel:

        switch (vmbus_proto_version) {
        case VERSION_WS2008:
                util_fw_version = UTIL_WS2K8_FW_VERSION;
                sd_srv_version = SD_VERSION_1;
                ts_srv_version = TS_VERSION_1;
                hb_srv_version = HB_VERSION_1;
                break;
        case VERSION_WIN7:
        case VERSION_WIN8:
        case VERSION_WIN8_1:
                util_fw_version = UTIL_FW_VERSION;
                sd_srv_version = SD_VERSION;
                ts_srv_version = TS_VERSION_3;
                hb_srv_version = HB_VERSION;
                break;
        case VERSION_WIN10:
        default:
                util_fw_version = UTIL_FW_VERSION;
                sd_srv_version = SD_VERSION;
                ts_srv_version = TS_VERSION;
                hb_srv_version = HB_VERSION;
                break;
        }

Olaf

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