On 05/21/15 at 04:40pm, Li, ZhenHua wrote:
> Hi Baoquan,
> During driver being loaded and initialized, when there is a new dma
> request, the function
>__get_valid_domain_for_dev
> is called, and then new page is mapped.
>
> Please check this:
> struct dma_map_ops intel_dma_ops = {
Hi Baoquan,
During driver being loaded and initialized, when there is a new dma
request, the function
__get_valid_domain_for_dev
is called, and then new page is mapped.
Please check this:
struct dma_map_ops intel_dma_ops = {
.alloc = intel_alloc_coherent,
.free = in
On 05/21/15 at 09:27am, Li, ZhenHua wrote:
> Hi Baoquan,
>
> In the early version of this patchset, old page tables are used by new
> kernel. But as discussed, we need to make kernel use new pages when
> there is a new dma request , so we need to unmap the pages which were
> mapped in old kernel,
Hi Baoquan,
In the early version of this patchset, old page tables are used by new
kernel. But as discussed, we need to make kernel use new pages when
there is a new dma request , so we need to unmap the pages which were
mapped in old kernel, and this is what this patch does.
Thanks
Zhenhua
On
On 05/11/15 at 05:52pm, Li, Zhen-Hua wrote:
> When a device driver issues the first dma_map command for a device, we
> assign a new and empty page-table, thus removing all mappings from the
> old kernel for the device.
Hi Zhenhua,
>From your patch I got it will remove all mappings, assign a new
p
When a device driver issues the first dma_map command for a device, we
assign a new and empty page-table, thus removing all mappings from the
old kernel for the device.
Signed-off-by: Li, Zhen-Hua
---
drivers/iommu/intel-iommu.c | 58 ++---
1 file changed,
