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feat(spmc): add FFA_FEATURES handler

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Enable the spmc to report the features that it currently supports.
Populated with the currently implemented functionality.

Signed-off-by: Marc Bonnici <marc.bonnici@arm.com>
Change-Id: I00e51ded284efd87cd50a0e9416dbc33f22ced85
This commit is contained in:
Marc Bonnici 2021-12-13 11:08:59 +00:00
parent f74e27723b
commit 55a296387b
2 changed files with 77 additions and 0 deletions
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3
services/std_svc/spm/el3_spmc/spmc.h
View file

@ -37,6 +37,9 @@
#define FFA_WB_TYPE_S2RAM 0
#define FFA_WB_TYPE_NOTS2RAM 1
/* FF-A Related helper macros. */
#define FFA_FEATURES_BIT31_MASK U(0x1u << 31)
#define FFA_PAGE_SIZE (4096)
#define FFA_RXTX_PAGE_COUNT_MASK 0x1F

74
services/std_svc/spm/el3_spmc/spmc_main.c
View file

@ -976,6 +976,76 @@ err:
return spmc_ffa_error_return(handle, ret);
}
static uint64_t ffa_features_handler(uint32_t smc_fid,
bool secure_origin,
uint64_t x1,
uint64_t x2,
uint64_t x3,
uint64_t x4,
void *cookie,
void *handle,
uint64_t flags)
{
uint32_t function_id = (uint32_t) x1;
uint32_t input_properties = (uint32_t) x2;
/*
* We don't currently support any additional input properties
* for any ABI therefore ensure this value is always set to 0.
*/
if (input_properties != 0) {
return spmc_ffa_error_return(handle, FFA_ERROR_NOT_SUPPORTED);
}
/* Check if a Feature ID was requested. */
if ((function_id & FFA_FEATURES_BIT31_MASK) == 0U) {
/* We currently don't support any additional features. */
return spmc_ffa_error_return(handle, FFA_ERROR_NOT_SUPPORTED);
}
/* Report if an FF-A ABI is supported. */
switch (function_id) {
/* Supported features from both worlds. */
case FFA_ERROR:
case FFA_SUCCESS_SMC32:
case FFA_FEATURES:
case FFA_VERSION:
case FFA_MSG_SEND_DIRECT_REQ_SMC32:
case FFA_MSG_SEND_DIRECT_REQ_SMC64:
case FFA_PARTITION_INFO_GET:
case FFA_RXTX_MAP_SMC32:
case FFA_RXTX_MAP_SMC64:
case FFA_RXTX_UNMAP:
/*
* We are relying on the fact that the other registers
* will be set to 0 as these values align with the
* currently implemented features of the SPMC. If this
* changes this function must be extended to handle
* reporting the additional functionality.
*/
SMC_RET1(handle, FFA_SUCCESS_SMC32);
/* Execution stops here. */
/* Supported ABIs only from the secure world. */
case FFA_MSG_SEND_DIRECT_RESP_SMC32:
case FFA_MSG_SEND_DIRECT_RESP_SMC64:
case FFA_MSG_WAIT:
if (!secure_origin) {
return spmc_ffa_error_return(handle,
FFA_ERROR_NOT_SUPPORTED);
}
SMC_RET1(handle, FFA_SUCCESS_SMC32);
/* Execution stops here. */
default:
return spmc_ffa_error_return(handle,
FFA_ERROR_NOT_SUPPORTED);
}
}
/*******************************************************************************
* This function will parse the Secure Partition Manifest. From manifest, it
* will fetch details for preparing Secure partition image context and secure
@ -1372,6 +1442,10 @@ uint64_t spmc_smc_handler(uint32_t smc_fid,
return ffa_version_handler(smc_fid, secure_origin, x1, x2, x3,
x4, cookie, handle, flags);
case FFA_FEATURES:
return ffa_features_handler(smc_fid, secure_origin, x1, x2, x3,
x4, cookie, handle, flags);
case FFA_MSG_SEND_DIRECT_REQ_SMC32:
case FFA_MSG_SEND_DIRECT_REQ_SMC64:
return direct_req_smc_handler(smc_fid, secure_origin, x1, x2,