On 08/04/17 at 02:21pm, Joerg Roedel wrote:
> On Tue, Aug 01, 2017 at 07:37:22PM +0800, Baoquan He wrote:
> > static void init_device_table_dma(void)
> > {
> > @@ -2137,9 +2140,49 @@ static void early_enable_iommu(struct amd_iommu
> > *iommu)
> > static void early_enable_iommus(void)
> > {
>
On Tue, Aug 01, 2017 at 07:37:22PM +0800, Baoquan He wrote:
> static void init_device_table_dma(void)
> {
> @@ -2137,9 +2140,49 @@ static void early_enable_iommu(struct amd_iommu *iommu)
> static void early_enable_iommus(void)
> {
> struct amd_iommu *iommu;
> + bool is_pre_disabled =
Here several things need be done:
- If iommu is pre-enabled in a normal kernel, just disable it and print
warning.
- If any one of IOMMUs is not pre-enabled in kdump kernel, just continue
as it does in normal kernel.
- If failed to copy dev table of old kernel, continue to proceed as
it
