On 4/19/22 6:20 PM, Isaku Yamahata wrote:
If timeout occurs, the state of adev->tdquote_buf is unknown. It's not safe to continue to using adev->tdquote_buf. VMM would continue to processing getquote request with this buffer. What if TDX_CMD_GEN_QUOTE is issued again, and tdquote_buf is re-used?
This part is not clearly discussed in the specification. May be spec should define some reasonable timeout and teardown details. Regarding not using this buffer again, what happens if we de-allocate it on timeout and the host still updates it? -- Sathyanarayanan Kuppuswamy Linux Kernel Developer
