coco/sev-guest/sev-guest.c

53 	/* request and response are in unencrypted memory */
54 	struct snp_guest_msg *request, *response;
276 	/* Build IV with response buffer sequence number */
291 	dev_dbg(snp_dev->dev, "response [seqno %lld type %d version %d sz %d]\n",
294 	/* Copy response from shared memory to encrypted memory. */
295 	memcpy(resp, snp_dev->response, sizeof(*resp));
301 	/* Verify response message type and version number. */
405 	 * this now because decryption uses the value stored in the response
443 	/* Clear shared memory's response for the host to populate. */
444 	memset(snp_dev->response, 0, sizeof(struct snp_guest_msg));
503 	 * The intermediate response buffer is used while decrypting the
504 	 * response payload. Make sure that it has enough space to cover the
541 	 * The intermediate response buffer is used while decrypting the
542 	 * response payload. Make sure that it has enough space to cover the
561 	/* The response buffer contains the sensitive data, explicitly clear it. */
611 	 * The intermediate response buffer is used while decrypting the
612 	 * response payload. Make sure that it has enough space to cover the
862 	/* Suspicious that the response populated entries without populating size */
943 	/* Allocate the shared page used for the request and response message. */
948 	snp_dev->response = alloc_shared_pages(dev, sizeof(struct snp_guest_msg));
949 	if (!snp_dev->response)
968 	snp_dev->input.resp_gpa = __pa(snp_dev->response);
989 	free_shared_pages(snp_dev->response, sizeof(struct snp_guest_msg));
1002 	free_shared_pages(snp_dev->response, sizeof(struct snp_guest_msg));