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drivers: optee: rpmb: fix returning CID to TEE

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The mmc CID value is one of the input parameters used to provision the
RPMB key. The trusted execution environment expects this value to be
specified in big endian format.

Before this fix, on little endian systems, the value returned by the
linux kernel mmc driver differed from the one returned by u-boot.
This meant that if linux provisioned the RPMB key, u-boot would not
have access to the partition (and the other way around).

Signed-off-by: Jorge Ramirez-Ortiz <jorge@foundries.io>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
This commit is contained in:
Jorge Ramirez-Ortiz 2019-11-26 17:19:34 +01:00 committed by Tom Rini
parent 787f10a9d2
commit 2464b229b5
1 changed files with 4 additions and 1 deletions
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5
drivers/tee/optee/rpmb.c
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@ -98,6 +98,7 @@ static struct mmc *get_mmc(struct optee_private *priv, int dev_id)
static u32 rpmb_get_dev_info(u16 dev_id, struct rpmb_dev_info *info)
{
struct mmc *mmc = find_mmc_device(dev_id);
int i;
if (!mmc)
return TEE_ERROR_ITEM_NOT_FOUND;
@ -105,7 +106,9 @@ static u32 rpmb_get_dev_info(u16 dev_id, struct rpmb_dev_info *info)
if (!mmc->ext_csd)
return TEE_ERROR_GENERIC;
memcpy(info->cid, mmc->cid, sizeof(info->cid));
for (i = 0; i < ARRAY_SIZE(mmc->cid); i++)
((u32 *) info->cid)[i] = cpu_to_be32(mmc->cid[i]);
info->rel_wr_sec_c = mmc->ext_csd[222];
info->rpmb_size_mult = mmc->ext_csd[168];
info->ret_code = RPMB_CMD_GET_DEV_INFO_RET_OK;