Re: [PATCH v7 25/36] swiotlb: Add warnings for use of bounce buffers with SME

2017-06-21 Thread Tom Lendacky
On 6/21/2017 5:50 AM, Borislav Petkov wrote: On Fri, Jun 16, 2017 at 01:54:36PM -0500, Tom Lendacky wrote: Add warnings to let the user know when bounce buffers are being used for DMA when SME is active. Since the bounce buffers are not in encrypted memory, these notifications are to allow the

Re: [PATCH v7 25/36] swiotlb: Add warnings for use of bounce buffers with SME

2017-06-21 Thread Borislav Petkov
On Fri, Jun 16, 2017 at 01:54:36PM -0500, Tom Lendacky wrote: > Add warnings to let the user know when bounce buffers are being used for > DMA when SME is active. Since the bounce buffers are not in encrypted > memory, these notifications are to allow the user to determine some > appropriate actio

[PATCH v7 25/36] swiotlb: Add warnings for use of bounce buffers with SME

2017-06-16 Thread Tom Lendacky
Add warnings to let the user know when bounce buffers are being used for DMA when SME is active. Since the bounce buffers are not in encrypted memory, these notifications are to allow the user to determine some appropriate action - if necessary. Actions can range from utilizing an IOMMU, replacin