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feat(spmc): add FFA_RUN handler

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Enable the SPMC to handle the FFA_RUN ABI and update
the state tracking accordingly.

Change-Id: I3e8a3fa3ec9b03830055d2fbd6124b8ff1ed4103
Signed-off-by: Marc Bonnici <marc.bonnici@arm.com>
This commit is contained in:
Marc Bonnici 2021-08-31 17:57:04 +01:00
parent d5fe92350c
commit aad20c85cb
2 changed files with 89 additions and 0 deletions
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7
services/std_svc/spm/el3_spmc/spmc.h
View file

@ -38,8 +38,15 @@
#define FFA_WB_TYPE_NOTS2RAM 1
/* FF-A Related helper macros. */
#define FFA_ID_MASK U(0xFFFF)
#define FFA_PARTITION_ID_SHIFT U(16)
#define FFA_FEATURES_BIT31_MASK U(0x1u << 31)
#define FFA_RUN_EP_ID(ep_vcpu_ids) \
((ep_vcpu_ids >> FFA_PARTITION_ID_SHIFT) & FFA_ID_MASK)
#define FFA_RUN_VCPU_ID(ep_vcpu_ids) \
(ep_vcpu_ids & FFA_ID_MASK)
#define FFA_PAGE_SIZE (4096)
#define FFA_RXTX_PAGE_COUNT_MASK 0x1F

82
services/std_svc/spm/el3_spmc/spmc_main.c
View file

@ -1017,6 +1017,7 @@ static uint64_t ffa_features_handler(uint32_t smc_fid,
case FFA_RXTX_MAP_SMC32:
case FFA_RXTX_MAP_SMC64:
case FFA_RXTX_UNMAP:
case FFA_MSG_RUN:
/*
* We are relying on the fact that the other registers
@ -1066,6 +1067,84 @@ static uint64_t ffa_id_get_handler(uint32_t smc_fid,
}
}
static uint64_t ffa_run_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)
{
struct secure_partition_desc *sp;
uint16_t target_id = FFA_RUN_EP_ID(x1);
uint16_t vcpu_id = FFA_RUN_VCPU_ID(x1);
unsigned int idx;
unsigned int *rt_state;
unsigned int *rt_model;
/* Can only be called from the normal world. */
if (secure_origin) {
ERROR("FFA_RUN can only be called from NWd.\n");
return spmc_ffa_error_return(handle,
FFA_ERROR_INVALID_PARAMETER);
}
/* Cannot run a Normal world partition. */
if (ffa_is_normal_world_id(target_id)) {
ERROR("Cannot run a NWd partition (0x%x).\n", target_id);
return spmc_ffa_error_return(handle,
FFA_ERROR_INVALID_PARAMETER);
}
/* Check that the target SP exists. */
sp = spmc_get_sp_ctx(target_id);
ERROR("Unknown partition ID (0x%x).\n", target_id);
if (sp == NULL) {
return spmc_ffa_error_return(handle,
FFA_ERROR_INVALID_PARAMETER);
}
idx = get_ec_index(sp);
if (idx != vcpu_id) {
ERROR("Cannot run vcpu %d != %d.\n", idx, vcpu_id);
return spmc_ffa_error_return(handle,
FFA_ERROR_INVALID_PARAMETER);
}
rt_state = &((sp->ec[idx]).rt_state);
rt_model = &((sp->ec[idx]).rt_model);
if (*rt_state == RT_STATE_RUNNING) {
ERROR("Partition (0x%x) is already running.\n", target_id);
return spmc_ffa_error_return(handle, FFA_ERROR_BUSY);
}
/*
* Sanity check that if the execution context was not waiting then it
* was either in the direct request or the run partition runtime model.
*/
if (*rt_state == RT_STATE_PREEMPTED || *rt_state == RT_STATE_BLOCKED) {
assert(*rt_model == RT_MODEL_RUN ||
*rt_model == RT_MODEL_DIR_REQ);
}
/*
* If the context was waiting then update the partition runtime model.
*/
if (*rt_state == RT_STATE_WAITING) {
*rt_model = RT_MODEL_RUN;
}
/*
* Forward the request to the correct SP vCPU after updating
* its state.
*/
*rt_state = RT_STATE_RUNNING;
return spmc_smc_return(smc_fid, secure_origin, x1, 0, 0, 0,
handle, cookie, flags, target_id);
}
/*******************************************************************************
* This function will parse the Secure Partition Manifest. From manifest, it
* will fetch details for preparing Secure partition image context and secure
@ -1502,6 +1581,9 @@ uint64_t spmc_smc_handler(uint32_t smc_fid,
return ffa_error_handler(smc_fid, secure_origin, x1, x2, x3, x4,
cookie, handle, flags);
case FFA_MSG_RUN:
return ffa_run_handler(smc_fid, secure_origin, x1, x2, x3, x4,
cookie, handle, flags);
default:
WARN("Unsupported FF-A call 0x%08x.\n", smc_fid);
break;