From: "Jan Beulich" <JBeulich@suse.com>
To: Kevin Tian <kevin.tian@intel.com>
Cc: Feng Wu <feng.wu@intel.com>, Quan Xu <quan.xu@intel.com>,
George Dunlap <george.dunlap@eu.citrix.com>,
Liu Jinsong <jinsong.liu@alibaba-inc.com>,
Dario Faggioli <dario.faggioli@citrix.com>,
"xen-devel@lists.xen.org" <xen-devel@lists.xen.org>,
Jun Nakajima <jun.nakajima@intel.com>,
Andrew Cooper <andrew.cooper3@citrix.com>,
Keir Fraser <keir@xen.org>
Subject: Re: [PATCH 1/2] IOMMU/MMU: Adjust top level functions for VT-d Device-TLB flush error.
Date: Thu, 17 Mar 2016 01:58:50 -0600 [thread overview]
Message-ID: <56EA71CA02000078000DD910@prv-mh.provo.novell.com> (raw)
In-Reply-To: <AADFC41AFE54684AB9EE6CBC0274A5D15F7EC7B1@SHSMSX101.ccr.corp.intel.com>
>>> On 17.03.16 at 08:32, <kevin.tian@intel.com> wrote:
>> From: Xu, Quan
>> Sent: Thursday, March 17, 2016 2:55 PM
>> --- a/xen/drivers/passthrough/vtd/x86/vtd.c
>> +++ b/xen/drivers/passthrough/vtd/x86/vtd.c
>> @@ -140,8 +140,11 @@ void __hwdom_init vtd_set_hwdom_mapping(struct domain *d)
>>
>> tmp = 1 << (PAGE_SHIFT - PAGE_SHIFT_4K);
>> for ( j = 0; j < tmp; j++ )
>> - iommu_map_page(d, pfn * tmp + j, pfn * tmp + j,
>> - IOMMUF_readable|IOMMUF_writable);
>> + if ( iommu_map_page(d, pfn * tmp + j, pfn * tmp + j,
>> + IOMMUF_readable|IOMMUF_writable) )
>> + printk(XENLOG_G_ERR
>> + "IOMMU: Map page gfn: 0x%lx(mfn: 0x%lx) failed.\n",
>> + pfn * tmp + j, pfn * tmp + j);
>>
>> if (!(i & (0xfffff >> (PAGE_SHIFT - PAGE_SHIFT_4K))))
>> process_pending_softirqs();
>
> Hi, Quan, this patch looks good to me in general. Just double confirm one
> thing. Above doesn't handle error from iommu_map_page, while only
> throwing out warning. Not sure whether it has been discussed before
> as the agreement or not.
For code paths involved in preparing the hardware domain only
I had specifically asked to handle such in a best effort manner,
instead of explicitly rendering a system unbootable.
Jan
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next prev parent reply other threads:[~2016-03-17 7:58 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-17 6:54 [PATCH 0/2] Check VT-d Device-TLB flush error Quan Xu
2016-03-17 6:54 ` [PATCH 1/2] IOMMU/MMU: Adjust top level functions for " Quan Xu
2016-03-17 7:32 ` Tian, Kevin
2016-03-17 7:58 ` Jan Beulich [this message]
2016-03-17 8:00 ` Tian, Kevin
2016-03-17 12:30 ` George Dunlap
2016-03-17 12:33 ` George Dunlap
2016-03-18 3:19 ` Xu, Quan
2016-03-18 8:09 ` Jan Beulich
2016-03-24 6:45 ` Xu, Quan
2016-03-18 7:54 ` Xu, Quan
2016-03-18 8:19 ` Jan Beulich
2016-03-18 9:09 ` Xu, Quan
2016-03-18 9:29 ` Jan Beulich
2016-03-18 9:38 ` Dario Faggioli
2016-03-18 9:48 ` Jan Beulich
2016-03-21 6:18 ` Tian, Kevin
2016-03-21 12:22 ` Jan Beulich
2016-03-24 9:02 ` Xu, Quan
2016-03-24 9:58 ` Jan Beulich
2016-03-24 14:12 ` Xu, Quan
2016-03-24 14:37 ` Jan Beulich
2016-03-17 17:14 ` Jan Beulich
2016-03-28 3:33 ` Xu, Quan
2016-03-29 7:20 ` Jan Beulich
2016-03-30 2:28 ` Xu, Quan
2016-03-30 2:35 ` Xu, Quan
2016-03-30 8:05 ` Jan Beulich
2016-03-17 6:54 ` [PATCH 2/2] IOMMU/MMU: Adjust low " Quan Xu
2016-03-17 7:37 ` Tian, Kevin
2016-03-18 2:30 ` Xu, Quan
2016-03-18 8:06 ` Jan Beulich
2016-03-21 5:01 ` Tian, Kevin
2016-03-17 15:31 ` George Dunlap
2016-03-18 6:57 ` Xu, Quan
2016-03-18 10:20 ` Jan Beulich
2016-03-25 9:27 ` Xu, Quan
2016-03-29 7:36 ` Jan Beulich
2016-04-11 3:09 ` Xu, Quan
2016-04-11 3:27 ` Xu, Quan
2016-04-11 16:34 ` Jan Beulich
2016-04-12 1:09 ` Xu, Quan
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