Messages in this thread | | | Subject | Re: ibmvtpm byteswapping inconsistency | From | Ashley Lai <> | Date | Thu, 26 Jan 2017 16:58:15 -0600 |
| |
Adding Vicky from IBM.
On 01/26/2017 04:05 PM, Jason Gunthorpe wrote: > On Thu, Jan 26, 2017 at 09:22:48PM +0100, Michal Such??nek wrote: > >> This is repeated a few times in the driver so I added memset to quiet >> gcc and make behavior deterministic in case the unused fields get some >> meaning in the future. > Yep, reserved certainly needs to be zeroed.. Can you send a patch? > memset is overkill... > >> However, in tpm_ibmvtpm_send the structure is initialized as >> >> struct ibmvtpm_crq crq; >> __be64 *word = (__be64 *)&crq; >> ... >> crq.valid = (u8)IBMVTPM_VALID_CMD; >> crq.msg = (u8)VTPM_TPM_COMMAND; >> crq.len = cpu_to_be16(count); >> crq.data = cpu_to_be32(ibmvtpm->rtce_dma_handle); >> >> and submitted with >> >> rc = ibmvtpm_send_crq(ibmvtpm->vdev, be64_to_cpu(word[0]), >> be64_to_cpu(word[1])); >> meaning it is swapped twice. > No idea, Nayna may know. > > My guess is that '__be64 *word' should be 'u64 *word'... > > Jason
| |