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Bug fix: Protect TSP prints with lock 

CPUs use console to print debug/info messages. This critical section
must be guarded by locks to avoid overlaps in messages from multiple
CPUs.

Change-Id: I786bf90072c1ed73c4f53d8c950979d95255e67e
Signed-off-by: Madhukar Pappireddy <madhukar.pappireddy@arm.com>
This commit is contained in:
Madhukar Pappireddy 2020-03-20 01:46:21 -05:00
parent c979685271
commit ae7b922d87
1 changed files with 4 additions and 0 deletions
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4
bl32/tsp/tsp_main.c
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@ -371,12 +371,16 @@ tsp_args_t *tsp_smc_handler(uint64_t func,
tsp_stats[linear_id].smc_count++;
tsp_stats[linear_id].eret_count++;
#if LOG_LEVEL >= LOG_LEVEL_INFO
spin_lock(&console_lock);
INFO("TSP: cpu 0x%lx received %s smc 0x%llx\n", read_mpidr(),
((func >> 31) & 1) == 1 ? "fast" : "yielding",
func);
INFO("TSP: cpu 0x%lx: %d smcs, %d erets\n", read_mpidr(),
tsp_stats[linear_id].smc_count,
tsp_stats[linear_id].eret_count);
spin_unlock(&console_lock);
#endif
/* Render secure services and obtain results here */
results[0] = arg1;