From: Joerg Roedel <joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
To: AceLan Kao <acelan.kao-Z7WLFzj8eWMS+FvcfC7Uqw@public.gmane.org>
Cc: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org
Subject: Re: Any side effect if turn off amd_iommu
Date: Mon, 4 May 2015 13:08:02 +0200 [thread overview]
Message-ID: <20150504110802.GE15736@8bytes.org> (raw)
In-Reply-To: <CAFv23Q==+tXTif9uQfyTHE28hxGt80WYS=A6qN7q0Q4q7re6kw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
Hi Acelan,
On Thu, Apr 23, 2015 at 10:15:33AM +0800, AceLan Kao wrote:
> We can confirm that the issue comes from the resources conflict,
> adding this boot option can solve the issue.
> ivrs_ioapic[5]=00:00.1
> We've tried to negotiate with the OEM BIOS team, but they refused to
> modify the BIOS code, since there is no issue on MS Windows and it'll
> require to re-start a full test if the BIOS code is changed, so they
> don't want to do that.
>
> I'm wondering if we can add a quirk to list those machine and assign
> them the correct ivrs_ioapic value in amd_iommu driver?
It is probably hard to match a specific machine which has the bug. What
do you think would be a good indicator to check whether this BIOS bug is
present?
Joerg
next prev parent reply other threads:[~2015-05-04 11:08 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-25 3:30 Any side effect if turn off amd_iommu AceLan Kao
[not found] ` <CAFv23QmxQ3vJnMEGN0TNR3vLAx1MN7ptB0y3QQLKciqfT3OBsQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-03-25 14:04 ` Joerg Roedel
[not found] ` <20150325140410.GS4441-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2015-03-26 2:26 ` AceLan Kao
[not found] ` <CAFv23Qn93z4pE6RtURgoiBADpgCWZ6gfpMPn3akfJibudRi+Qg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-03-26 12:05 ` Joerg Roedel
[not found] ` <20150326120547.GU4441-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2015-03-27 0:48 ` AceLan Kao
[not found] ` <CAFv23QnUO+w0EXUx8DtgPx0W=fz37_R04EW6P-g+PF_y_U1dfA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-03-30 16:09 ` Joerg Roedel
[not found] ` <20150330160910.GZ4441-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2015-03-31 0:30 ` AceLan Kao
[not found] ` <CAFv23QmOjFb9NgLY0aW55OpQSecFA83jNOU1TY7o3qWuft1_Cw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-04-23 2:15 ` AceLan Kao
[not found] ` <CAFv23Q==+tXTif9uQfyTHE28hxGt80WYS=A6qN7q0Q4q7re6kw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-05-04 2:27 ` AceLan Kao
2015-05-04 11:08 ` Joerg Roedel [this message]
[not found] ` <20150504110802.GE15736-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2015-05-05 7:30 ` AceLan Kao
[not found] ` <CAFv23QkRouVJ6siu==-EjLndP2Z7inz+qVeKxLci3=R=9r8+zQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-05-05 15:13 ` Joerg Roedel
[not found] ` <20150505151319.GO15736-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2015-05-13 7:37 ` AceLan Kao
[not found] ` <CAFv23Q=iU7X1EOcZDUh6NhcnuvyyNSKUGEot6ZhCg8uZ7kRNAQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-05-13 13:44 ` Joerg Roedel
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