Messages in this thread | | | Date | Thu, 21 Jul 2022 09:49:03 -0700 | Subject | Re: [PATCH v8 5/5] x86/tdx: Add Quote generation support | From | Dave Hansen <> |
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On 7/21/22 09:42, Sathyanarayanan Kuppuswamy wrote: > On 7/21/22 9:08 AM, Dave Hansen wrote: >> On 6/8/22 19:52, Kuppuswamy Sathyanarayanan wrote: >>> For shared buffer allocation, alternatives like using the DMA API is >>> also considered. Although it simpler to use, it is not preferred because >>> dma_alloc_*() APIs require a valid bus device as argument, which would >>> need converting the attestation driver into a platform device driver. >>> This is unnecessary, and since the attestation driver does not do real >>> DMA, there is no need to use real DMA APIs. >> Let's actually try to walk through the requirements for the memory >> allocation here. >> >> 1. The guest kernel needs to allocate some guest physical memory >> for the attestation data buffer > Physically contiguous memory.
Remind me how large the quote structures are.
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