Re: [Qemu-devel] [PATCH 0/2] ignore bus master for e1000

[Amos Kong]

On Thu, Dec 18, 2014 at 10:13:07AM +0008, Jason Wang wrote:
> 
> 
> On Thu, Dec 18, 2014 at 5:22 PM, Amos Kong <address@hidden> wrote:
> >Win2012-64r2 guest doesn't set bus mastering correctly,
> >it caused guest network down, this patch ignored it for
> >e1000 nic for workarounding the guest issue.
> >
> >Patch 1 is an update version of:
> >http://lists.gnu.org/archive/html/qemu-devel/2014-12/msg00048.html
> >transmit packets are also defered in latest version.
> >
> >Amos Kong (1):
> >  e1000: unconditionally enable bus mastering
> >
> >Michael S. Tsirkin (1):
> >  e1000: defer packets until BM enabled
> >
> > hw/net/e1000.c | 34 +++++++++++++++++++++++++++++++++-
> > 1 file changed, 33 insertions(+), 1 deletion(-)
> >
> >-- 
> >2.1.0
> 
> Another question unrelated to this series:
> Does 82540EM still supported by Win2k12?

82540EM isn't in the support list. Some users want to use emulated
e1000 to debug Windows guests. I will try other emulated nics in QEMU.

> The following link shows that 82540EM were not supported in Win2k12.
> https://downloadcenter.intel.com/SearchResult.aspx?lang=eng&ProdId=983
> 
> The oldest 825x card supported by 2k12 seems 82574.
> https://downloadcenter.intel.com/Detail_Desc.aspx?DwnldID=21694&lang=eng&ProdId=3189
 
> If yes, workaround a buggy driver may be endless work in the future.

I think so.

-- 
                        Amos.

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