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feat(drtm): add DRTM parameters structure version check

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Added DRTM parameters structure version check that as per
the current released DRTM specification [1].

Mainly to cater below mentioned in the specification [1]
section 3.12 -
For a given DRTM major version number this structure will
always be extended in a backwards compatible manner.

[1]: https://developer.arm.com/documentation/den0113/a

Change-Id: I9f312c7f9f20152c5d7e40a22b462c7fe8db70bc
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
This commit is contained in:
Manish V Badarkhe 2022-09-21 10:04:16 +01:00 • committed by Manish V Badarkhe
parent 6b2193bd48
commit c503ded2c5
2 changed files with 10 additions and 3 deletions
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7
services/std_svc/drtm/drtm_main.c
View file

@ -366,9 +366,10 @@ static enum drtm_retc drtm_dl_check_args(uint64_t x1,
}
a = &args_buf;
if (a->version != 1) {
ERROR("DRTM: parameters structure incompatible with major version %d\n",
ARM_DRTM_VERSION_MAJOR);
if (!((a->version >= ARM_DRTM_PARAMS_MIN_VERSION) &&
(a->version <= ARM_DRTM_PARAMS_MAX_VERSION))) {
ERROR("DRTM: parameters structure version %u is unsupported\n",
a->version);
return NOT_SUPPORTED;
}

6
services/std_svc/drtm/drtm_main.h
View file

@ -36,6 +36,12 @@
#define DL_ARGS_GET_DLME_ENTRY_POINT(a) \
(((a)->dlme_paddr + (a)->dlme_img_off + (a)->dlme_img_ep_off))
/*
* Range(Min/Max) of DRTM parameter structure versions supported
*/
#define ARM_DRTM_PARAMS_MIN_VERSION U(1)
#define ARM_DRTM_PARAMS_MAX_VERSION U(1)
enum drtm_dlme_el {
DLME_AT_EL1 = MODE_EL1,
DLME_AT_EL2 = MODE_EL2