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From: "Wangting (Kathy)" <kathy.wangting@huawei.com>
To: Vadim Rozenfeld <vrozenfe@redhat.com>
Cc: qemu-devel <qemu-devel@nongnu.org>
Subject: [Qemu-devel] Fwd: [question] About MSI for vioscsi
Date: Thu, 8 Jan 2015 16:40:53 +0800	[thread overview]
Message-ID: <54AE4295.7040109@huawei.com> (raw)
In-Reply-To: <54AE4253.2090206@huawei.com>

Hi Vadim,

   In order to enable MSI for vioscsi in virtio-win-0.1-74, I try to merge

the patch about Bug 1077566 into it, but I find that MSI still doesn't work,

because the value of IRQ is not negative in the device manager.

   I try to trace the I/O path with ENABLE_COM_DEBUG, and I find that

pMsixCapOffset->MessageControl.MSIXEnable is zero when

StorPortGetBusData returned in VioScsiFindAdapter, so MSI can't be enabled.

   I have tested that MSI is successfully enabled in virtio-win-0.1-81.

But I still want to find out why the patch is not work in virtio-win-0.1-74.

Is there some important points I missed?

   Thank you very much.

   Best wishes,

   Ting Wang

       reply	other threads:[~2015-01-08  8:42 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <54AE4253.2090206@huawei.com>
2015-01-08  8:40 ` Wangting (Kathy) [this message]
2015-01-08  9:01   ` [Qemu-devel] Fwd: [question] About MSI for vioscsi Vadim Rozenfeld
2015-01-08  9:27     ` Wangting (Kathy)
2015-01-08 10:03       ` Vadim Rozenfeld
2015-01-09  3:48         ` Wangting (Kathy)

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