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From: "Tian, Kevin" <kevin.tian@intel.com>
To: "Xu, Quan" <quan.xu@intel.com>,
	"xen-devel@lists.xen.org" <xen-devel@lists.xen.org>
Cc: Keir Fraser <keir@xen.org>, Jan Beulich <jbeulich@suse.com>,
	George Dunlap <george.dunlap@eu.citrix.com>,
	Liu Jinsong <jinsong.liu@alibaba-inc.com>,
	Dario Faggioli <dario.faggioli@citrix.com>,
	"Nakajima, Jun" <jun.nakajima@intel.com>,
	Andrew Cooper <andrew.cooper3@citrix.com>,
	"Wu, Feng" <feng.wu@intel.com>
Subject: Re: [PATCH 1/2] IOMMU/MMU: Adjust top level functions for VT-d Device-TLB flush error.
Date: Thu, 17 Mar 2016 07:32:57 +0000	[thread overview]
Message-ID: <AADFC41AFE54684AB9EE6CBC0274A5D15F7EC7B1@SHSMSX101.ccr.corp.intel.com> (raw)
In-Reply-To: <1458197676-60696-2-git-send-email-quan.xu@intel.com>

> From: Xu, Quan
> Sent: Thursday, March 17, 2016 2:55 PM
> 
> diff --git a/xen/drivers/passthrough/vtd/x86/vtd.c
> b/xen/drivers/passthrough/vtd/x86/vtd.c
> index c0d6aab..e5ab10a 100644
> --- 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.

Thanks
Kevin

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  reply	other threads:[~2016-03-17  7:32 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 [this message]
2016-03-17  7:58     ` Jan Beulich
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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