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On Thu, Apr 05, 2018 at 08:09:30PM +0530, Anshuman Khandual wrote: > On 04/05/2018 04:26 PM, Anshuman Khandual wrote: > > There are certian platforms which would like to use SWIOTLB based DMA API > > for bouncing purpose without actually requiring an IOMMU back end. But the > > virtio core does not allow such mechanism. Right n...

On Thu, Apr 05, 2018 at 08:09:30PM +0530, Anshuman Khandual wrote: > On 04/05/2018 04:26 PM, Anshuman Khandual wrote: > > There are certian platforms which would like to use SWIOTLB based DMA API > > for bouncing purpose without actually requiring an IOMMU back end. But the > > virtio core does not allow such mechanism. Right n...

On 06/16/2016 11:07 AM, Minchan Kim wrote: > On Thu, Jun 16, 2016 at 09:12:07AM +0530, Anshuman Khandual wrote: >> On 06/16/2016 05:56 AM, Minchan Kim wrote: >>> On Wed, Jun 15, 2016 at 12:15:04PM +0530, Anshuman Khandual wrote: >>>> On 06/15/2016 08:02 AM, Minchan Kim wrote: >>>>> Hi, >>>>> >>>>> On Mon, Jun 13, 2016 at...

On 06/16/2016 11:07 AM, Minchan Kim wrote: > On Thu, Jun 16, 2016 at 09:12:07AM +0530, Anshuman Khandual wrote: >> On 06/16/2016 05:56 AM, Minchan Kim wrote: >>> On Wed, Jun 15, 2016 at 12:15:04PM +0530, Anshuman Khandual wrote: >>>> On 06/15/2016 08:02 AM, Minchan Kim wrote: >>>>> Hi, >>>>> >>>>> On Mon, Jun 13, 2016 at...

...ing SG buffer addresses as IOVA instead of simple GPA which is the case for simple bounce buffers after being processed with SWIOTLB API. To enable this usage, it introduces an architecture specific function which will just make virtio core front end select DMA operations structure. Signed-off-by: Anshuman Khandual <khandual at linux.vnet.ibm.com> --- This RFC is just to get some feedback. Please ignore the function call back into the architecture. It can be worked out properly later on. But the question is can we have virtio devices in the guest which would like to use SWIOTLB based (or any cu...

...ing SG buffer addresses as IOVA instead of simple GPA which is the case for simple bounce buffers after being processed with SWIOTLB API. To enable this usage, it introduces an architecture specific function which will just make virtio core front end select DMA operations structure. Signed-off-by: Anshuman Khandual <khandual at linux.vnet.ibm.com> --- This RFC is just to get some feedback. Please ignore the function call back into the architecture. It can be worked out properly later on. But the question is can we have virtio devices in the guest which would like to use SWIOTLB based (or any cu...

On 06/16/2016 05:56 AM, Minchan Kim wrote: > On Wed, Jun 15, 2016 at 12:15:04PM +0530, Anshuman Khandual wrote: >> On 06/15/2016 08:02 AM, Minchan Kim wrote: >>> Hi, >>> >>> On Mon, Jun 13, 2016 at 03:08:19PM +0530, Anshuman Khandual wrote: >>>>> On 05/31/2016 05:31 AM, Minchan Kim wrote: >>>>>>> @@ -791,6 +921,7 @@ static i...

On 06/16/2016 05:56 AM, Minchan Kim wrote: > On Wed, Jun 15, 2016 at 12:15:04PM +0530, Anshuman Khandual wrote: >> On 06/15/2016 08:02 AM, Minchan Kim wrote: >>> Hi, >>> >>> On Mon, Jun 13, 2016 at 03:08:19PM +0530, Anshuman Khandual wrote: >>>>> On 05/31/2016 05:31 AM, Minchan Kim wrote: >>>>>>> @@ -791,6 +921,7 @@ static i...

On Fri, Apr 06, 2018 at 01:09:43AM +1000, Benjamin Herrenschmidt wrote: > On Thu, 2018-04-05 at 17:54 +0300, Michael S. Tsirkin wrote: > > On Thu, Apr 05, 2018 at 08:09:30PM +0530, Anshuman Khandual wrote: > > > On 04/05/2018 04:26 PM, Anshuman Khandual wrote: > > > > There are certian platforms which would like to use SWIOTLB based DMA API > > > > for bouncing purpose without actually requiring an IOMMU back end. But the > > > > virtio cor...

On Fri, Apr 06, 2018 at 01:09:43AM +1000, Benjamin Herrenschmidt wrote: > On Thu, 2018-04-05 at 17:54 +0300, Michael S. Tsirkin wrote: > > On Thu, Apr 05, 2018 at 08:09:30PM +0530, Anshuman Khandual wrote: > > > On 04/05/2018 04:26 PM, Anshuman Khandual wrote: > > > > There are certian platforms which would like to use SWIOTLB based DMA API > > > > for bouncing purpose without actually requiring an IOMMU back end. But the > > > > virtio cor...

Hello all, I’m planning to transition the code ownership of the Hexagon backend to Krzysztof Parzyszek. Krzysztof has done an excellent job of updating the Hexagon backend and engaging in community discussions (on the Hexagon backend and on other topics). He has a number of improvements planned for the Hexagon compiler and is an obvious choice for owning the Hexagon target. If there are no

On Mon, Jun 27, 2016 at 11:21:01AM +0530, Anshuman Khandual wrote: > On 06/16/2016 11:07 AM, Minchan Kim wrote: > > On Thu, Jun 16, 2016 at 09:12:07AM +0530, Anshuman Khandual wrote: > >> On 06/16/2016 05:56 AM, Minchan Kim wrote: > >>> On Wed, Jun 15, 2016 at 12:15:04PM +0530, Anshuman Khandual wrote: > >>&gt...

On 07/20/2018 09:29 AM, Anshuman Khandual wrote: > Now that virtio core always needs all virtio devices to have DMA OPS, we > need to make sure that the structure it points is the right one. In the > absence of VIRTIO_F_IOMMU_PLATFORM flag QEMU expects GPA from guest kernel. > In such case, virtio device must use defau...

On 07/20/2018 09:29 AM, Anshuman Khandual wrote: > Now that virtio core always needs all virtio devices to have DMA OPS, we > need to make sure that the structure it points is the right one. In the > absence of VIRTIO_F_IOMMU_PLATFORM flag QEMU expects GPA from guest kernel. > In such case, virtio device must use defau...

...x-foundation.org> Cc: nouveau at lists.freedesktop.org Cc: linuxppc-dev at lists.ozlabs.org Cc: linux-snps-arc at lists.infradead.org Cc: linux-arm-kernel at lists.infradead.org Cc: linux-mips at vger.kernel.org Cc: x86 at kernel.org Cc: linux-mm at kvack.org Cc: linux-kernel at vger.kernel.org Anshuman Khandual (2): powerpc/mm: Drop platform defined pmd_mknotpresent() mm/thp: Rename pmd_mknotpresent() as pmd_mknotvalid() arch/arc/include/asm/hugepage.h | 2 +- arch/arm/include/asm/pgtable-3level.h | 2 +- arch/arm64/include/asm/pgtable.h | 2 +- arch/mips/inc...

On Thu, 2018-04-05 at 17:54 +0300, Michael S. Tsirkin wrote: > On Thu, Apr 05, 2018 at 08:09:30PM +0530, Anshuman Khandual wrote: > > On 04/05/2018 04:26 PM, Anshuman Khandual wrote: > > > There are certian platforms which would like to use SWIOTLB based DMA API > > > for bouncing purpose without actually requiring an IOMMU back end. But the > > > virtio core does not allow suc...

There are a bunch of us working on LLVM in Austin. So we're organizing a LLVM Austin Social in September. The social will be on Wednesday, September 12 from 5 pm at the BB Rovers Cafe and Pub. It'll be great to meet up with folks in Austin who are also interested in LLVM. Please reply and let me know if you plan on attending so that I can get a count. BB Rovers is on Jollyville road

On Tue, Apr 21, 2020 at 04:57:26AM +0530, Anshuman Khandual wrote: > > > On 04/21/2020 02:33 AM, Will Deacon wrote: > > On Fri, Mar 20, 2020 at 10:24:17AM +0530, Anshuman Khandual wrote: > >> pmd_present() is expected to test positive after pmdp_mknotpresent() as the > >> PMD entry still points to a valid huge pag...

On Fri, Jul 20, 2018 at 09:29:41AM +0530, Anshuman Khandual wrote: >Subject: Re: [RFC 4/4] virtio: Add platform specific DMA API translation for > virito devices s/virito/virtio/ > This adds a hook which a platform can define in order to allow it to > override virtio device's DMA OPS irrespective of whether it has the > flag VI...

On Fri, Jul 20, 2018 at 09:29:41AM +0530, Anshuman Khandual wrote: >Subject: Re: [RFC 4/4] virtio: Add platform specific DMA API translation for > virito devices s/virito/virtio/ > This adds a hook which a platform can define in order to allow it to > override virtio device's DMA OPS irrespective of whether it has the > flag VI...