diff options
| -rw-r--r-- | arch/x86/coco/sev/core.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/x86/coco/sev/core.c b/arch/x86/coco/sev/core.c index 068653865bfb..b0d423a353ab 100644 --- a/arch/x86/coco/sev/core.c +++ b/arch/x86/coco/sev/core.c @@ -2008,6 +2008,15 @@ int snp_send_guest_request(struct snp_msg_desc *mdesc, struct snp_guest_req *req u64 seqno; int rc; + /* + * enc_payload() calls aesgcm_encrypt(), which can potentially offload to HW. + * The offload's DMA SG list of data to encrypt has to be in linear mapping. + */ + if (!virt_addr_valid(req->req_buf) || !virt_addr_valid(req->resp_buf)) { + pr_warn("AES-GSM buffers must be in linear mapping"); + return -EINVAL; + } + guard(mutex)(&snp_cmd_mutex); /* Check if the VMPCK is not empty */ |