> From: Paul Durrant
> Sent: Friday, March 13, 2020 5:26 PM
>
> > -Original Message-
> > From: Jan Beulich
> > Sent: 13 March 2020 08:10
> > To: Tian, Kevin
> > Cc: xen-devel@lists.xenproject.org; Andrew Cooper
> ; Paul Durrant
> >
> > Subject: Re: [PATCH v3] IOMMU: make DMA
> From: Paul Durrant
> Sent: Friday, March 13, 2020 5:26 PM
>
> > -Original Message-
> > From: Tian, Kevin
> > Sent: 13 March 2020 03:23
> > To: p...@xen.org; 'Jan Beulich'
> > Cc: xen-devel@lists.xenproject.org; 'Andrew Cooper'
>
> >
> -Original Message-
> From: Jan Beulich
> Sent: 13 March 2020 08:10
> To: Tian, Kevin
> Cc: xen-devel@lists.xenproject.org; Andrew Cooper
> ; Paul Durrant
>
> Subject: Re: [PATCH v3] IOMMU: make DMA containment of quarantined devices
> optional
>
> On 13.03.2020 04:05, Tian, Kevin
> -Original Message-
> From: Tian, Kevin
> Sent: 13 March 2020 03:23
> To: p...@xen.org; 'Jan Beulich'
> Cc: xen-devel@lists.xenproject.org; 'Andrew Cooper'
>
> Subject: RE: [Xen-devel] [PATCH v3] IOMMU: make DMA containment of
> quarantined devices optional
&
On 13.03.2020 04:05, Tian, Kevin wrote:
>> From: Jan Beulich
>> Sent: Tuesday, March 10, 2020 6:31 PM
>>
>> On 10.03.2020 06:30, Tian, Kevin wrote:
From: Jan Beulich
Sent: Monday, March 9, 2020 7:09 PM
Containing still in flight DMA was introduced to work around certain
> From: Paul Durrant
> Sent: Wednesday, March 11, 2020 12:05 AM
>
[...]
>
> >
> > > However, is a really saying that things will break if any of the
> > > PTEs has their present bit clear?
> >
> > Well, you said that read faults are fatal (to the host). Reads will,
> > for any address with an
> From: Jan Beulich
> Sent: Tuesday, March 10, 2020 6:31 PM
>
> On 10.03.2020 06:30, Tian, Kevin wrote:
> >> From: Jan Beulich
> >> Sent: Monday, March 9, 2020 7:09 PM
> >>
> >> Containing still in flight DMA was introduced to work around certain
> >> devices / systems hanging hard upon hitting
> From: Jan Beulich
> Sent: Tuesday, March 10, 2020 6:27 PM
>
> On 10.03.2020 04:43, Tian, Kevin wrote:
> >> From: Jan Beulich
> >> Sent: Monday, March 9, 2020 7:09 PM
> >>
> >> I'm happy to take better suggestions to replace the "full" command line
> >> option and Kconfig prompt tokens. I
On 10.03.2020 17:05, Paul Durrant wrote:
>> -Original Message-
>> From: Jan Beulich
>> Sent: 10 March 2020 15:44
>> To: p...@xen.org
>> Cc: xen-devel@lists.xenproject.org; 'Tian, Kevin' ;
>> 'Andrew Cooper'
>>
>> Subject: Re: [X
> -Original Message-
> From: Jan Beulich
> Sent: 10 March 2020 15:44
> To: p...@xen.org
> Cc: xen-devel@lists.xenproject.org; 'Tian, Kevin' ;
> 'Andrew Cooper'
>
> Subject: Re: [Xen-devel] [PATCH v3] IOMMU: make DMA containment of
> quarantined devices option
On 10.03.2020 16:13, Paul Durrant wrote:
>> -Original Message-
>> From: Jan Beulich
>> Sent: 10 March 2020 15:05
>> To: p...@xen.org
>> Cc: 'Tian, Kevin' ; xen-devel@lists.xenproject.org;
>> 'Andrew Cooper'
>>
>> Subject: Re: [PATCH v3] IOMMU: make DMA containment of quarantined devices
> -Original Message-
> From: Jan Beulich
> Sent: 10 March 2020 15:05
> To: p...@xen.org
> Cc: 'Tian, Kevin' ; xen-devel@lists.xenproject.org;
> 'Andrew Cooper'
>
> Subject: Re: [PATCH v3] IOMMU: make DMA containment of quarantined devices
> optional
>
> On 10.03.2020 13:30, Paul
On 10.03.2020 13:30, Paul Durrant wrote:
>> -Original Message-
>> From: Jan Beulich
>> Sent: 10 March 2020 10:27
>> To: Tian, Kevin ; Paul Durrant
>> Cc: xen-devel@lists.xenproject.org; Andrew Cooper
>> Subject: Re: [PATCH v3] IOMMU: make DMA containment of quarantined devices
>>
> -Original Message-
> From: Jan Beulich
> Sent: 10 March 2020 10:27
> To: Tian, Kevin ; Paul Durrant
> Cc: xen-devel@lists.xenproject.org; Andrew Cooper
> Subject: Re: [PATCH v3] IOMMU: make DMA containment of quarantined devices
> optional
>
> On 10.03.2020 04:43, Tian, Kevin wrote:
On 10.03.2020 06:30, Tian, Kevin wrote:
>> From: Jan Beulich
>> Sent: Monday, March 9, 2020 7:09 PM
>>
>> Containing still in flight DMA was introduced to work around certain
>> devices / systems hanging hard upon hitting a "not-present" IOMMU fault.
>> Passing through (such) devices (on such
On 10.03.2020 04:43, Tian, Kevin wrote:
>> From: Jan Beulich
>> Sent: Monday, March 9, 2020 7:09 PM
>>
>> I'm happy to take better suggestions to replace the "full" command line
>> option and Kconfig prompt tokens. I don't think though that "fault" and
>> "write-fault" are really suitable there.
On 10.03.2020 09:58, Paul Durrant wrote:
>> -Original Message-
>> From: Jan Beulich
>> Sent: 09 March 2020 11:09
>>
>> @@ -1276,11 +1276,15 @@ boolean (e.g. `iommu=no`) can override t
>> will prevent Xen from booting if IOMMUs aren't discovered and enabled
>> successfully.
>>
>>
> -Original Message-
> From: Jan Beulich
> Sent: 09 March 2020 11:09
> To: xen-devel@lists.xenproject.org
> Cc: Andrew Cooper ; Paul Durrant ;
> Kevin Tian
>
> Subject: [PATCH v3] IOMMU: make DMA containment of quarantined devices
> optional
>
> Containing still in flight DMA was
> From: Jan Beulich
> Sent: Monday, March 9, 2020 7:09 PM
>
> Containing still in flight DMA was introduced to work around certain
> devices / systems hanging hard upon hitting a "not-present" IOMMU fault.
> Passing through (such) devices (on such systems) is inherently insecure
> (as guests
> From: Jan Beulich
> Sent: Monday, March 9, 2020 7:09 PM
>
> Containing still in flight DMA was introduced to work around certain
> devices / systems hanging hard upon hitting a "not-present" IOMMU fault.
> Passing through (such) devices (on such systems) is inherently insecure
> (as guests
Containing still in flight DMA was introduced to work around certain
devices / systems hanging hard upon hitting a "not-present" IOMMU fault.
Passing through (such) devices (on such systems) is inherently insecure
(as guests could easily arrange for IOMMU faults of any kind to occur).
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