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From: "Thomas Hellström (VMware)" <thomas_os@shipmail.org>
To: Christoph Hellwig <hch@infradead.org>
Cc: dri-devel@lists.freedesktop.org, pv-drivers@vmware.com,
	linux-graphics-maintainer@vmware.com,
	linux-kernel@vger.kernel.org,
	"Thomas Hellstrom" <thellstrom@vmware.com>,
	"Dave Hansen" <dave.hansen@linux.intel.com>,
	"Andy Lutomirski" <luto@kernel.org>,
	"Peter Zijlstra" <peterz@infradead.org>,
	"Thomas Gleixner" <tglx@linutronix.de>,
	"Ingo Molnar" <mingo@redhat.com>,
	"Borislav Petkov" <bp@alien8.de>,
	"H. Peter Anvin" <hpa@zytor.com>,
	"Heiko Carstens" <heiko.carstens@de.ibm.com>,
	"Christian Borntraeger" <borntraeger@de.ibm.com>,
	"Tom Lendacky" <thomas.lendacky@amd.com>,
	"Christian König" <christian.koenig@amd.com>
Subject: Re: [PATCH v2 1/4] x86/mm: Export force_dma_unencrypted
Date: Wed, 4 Sep 2019 19:28:16 +0200	[thread overview]
Message-ID: <4cb5a2b4-cbd0-a86d-7881-f3d750df7d0e@shipmail.org> (raw)
In-Reply-To: <20190904122204.GA16937@infradead.org>

On 9/4/19 2:22 PM, Christoph Hellwig wrote:
> On Wed, Sep 04, 2019 at 09:32:30AM +0200, Thomas Hellström (VMware) wrote:
>> That sounds great. Is there anything I can do to help out? I thought this
>> was more or less a dead end since the current dma_mmap_ API requires the
>> mmap_sem to be held in write mode (modifying the vma->vm_flags) whereas
>> fault() only offers read mode. But that would definitely work.
> We'll just need to split into a setup and faul phase.  I have some
> sketches from a while ago, let me dust them off so that you can
> try them.

I'd be happy to.

Thanks,

Thomas



  reply	other threads:[~2019-09-04 17:28 UTC|newest]

Thread overview: 53+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-03 13:15 [PATCH v2 0/4] Have TTM support SEV encryption with coherent memory Thomas Hellström (VMware)
2019-09-03 13:15 ` [PATCH v2 1/4] x86/mm: Export force_dma_unencrypted Thomas Hellström (VMware)
2019-09-03 13:46   ` Christoph Hellwig
2019-09-03 14:32     ` Thomas Hellström (VMware)
2019-09-03 16:22       ` Christoph Hellwig
2019-09-03 16:22         ` Christoph Hellwig
2019-09-03 20:46         ` Thomas Hellström (VMware)
2019-09-03 20:46           ` Thomas Hellström (VMware)
2019-09-03 21:41           ` Andy Lutomirski
2019-09-04  6:58           ` Christoph Hellwig
2019-09-04  7:32             ` Thomas Hellström (VMware)
2019-09-04 12:22               ` Christoph Hellwig
2019-09-04 17:28                 ` Thomas Hellström (VMware) [this message]
2019-09-03 15:14   ` Dave Hansen
2019-09-03 15:14     ` Dave Hansen
2019-09-03 18:50     ` Thomas Hellström (VMware)
2019-09-03 18:50       ` Thomas Hellström (VMware)
2019-09-03 13:15 ` [PATCH v2 2/4] s390/mm: " Thomas Hellström (VMware)
2019-09-03 13:46   ` Christoph Hellwig
2019-09-03 13:15 ` [PATCH v2 3/4] drm/ttm, drm/vmwgfx: Correctly support support AMD memory encryption Thomas Hellström (VMware)
2019-09-03 19:38   ` Dave Hansen
2019-09-03 19:51     ` Daniel Vetter
2019-09-03 19:51       ` Daniel Vetter
2019-09-03 19:55       ` Dave Hansen
2019-09-03 20:36         ` Thomas Hellström (VMware)
2019-09-03 20:51           ` Dave Hansen
2019-09-03 21:05             ` Thomas Hellström (VMware)
2019-09-03 21:46               ` Andy Lutomirski
2019-09-03 22:08                 ` Thomas Hellström (VMware)
2019-09-03 22:15                   ` Thomas Hellström (VMware)
2019-09-03 22:15                     ` Thomas Hellström (VMware)
2019-09-03 23:10                     ` Dave Hansen
2019-09-04  8:34                       ` Thomas Hellström (VMware)
2019-09-03 23:15                     ` Andy Lutomirski
2019-09-04  6:49                       ` Thomas Hellström (VMware)
2019-09-04  7:53                         ` Daniel Vetter
2019-09-04 10:37                           ` Thomas Hellström (VMware)
2019-09-04 10:37                             ` Thomas Hellström (VMware)
2019-09-04 11:43                             ` Daniel Vetter
2019-09-04 18:16                         ` Christoph Hellwig
2019-09-04 18:16                           ` Christoph Hellwig
2019-09-04  7:33               ` Koenig, Christian
2019-09-04  8:19                 ` Thomas Hellström (VMware)
2019-09-04  8:42                   ` Thomas Hellström (VMware)
2019-09-04  8:42                     ` Thomas Hellström (VMware)
2019-09-04 11:10                   ` Koenig, Christian
2019-09-04 11:10                     ` Koenig, Christian
2019-09-04 12:35                     ` Thomas Hellström (VMware)
2019-09-04 12:35                       ` Thomas Hellström (VMware)
2019-09-04 13:05                       ` Thomas Hellström (VMware)
2019-09-03 13:15 ` [PATCH v2 4/4] drm/ttm: Cache dma pool decrypted pages when AMD SEV is active Thomas Hellström (VMware)
2019-09-03 15:18 ` [PATCH v2 0/4] Have TTM support SEV encryption with coherent memory Daniel Vetter
2019-09-05 10:43 ` Thomas Hellström (VMware)

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