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Unify type of "cpu_idx" across PSCI module.

Browse source 
NOTE for platform integrators:
   API `plat_psci_stat_get_residency()` third argument
   `last_cpu_idx` is changed from "signed int" to the
   "unsigned int" type.

Issue / Trouble points
1. cpu_idx is used as mix of `unsigned int` and `signed int` in code
with typecasting at some places leading to coverity issues.

2. Underlying platform API's return cpu_idx as `unsigned int`
and comparison is performed with platform specific defines
`PLAFORM_xxx` which is not consistent

Misra Rule 10.4:
The value of a complex expression of integer type may only be cast to
a type that is narrower and of the same signedness as the underlying
type of the expression.

Based on above points, cpu_idx is kept as `unsigned int` to match
the API's and low-level functions and platform defines are updated
where ever required

Signed-off-by: Deepika Bhavnani <deepika.bhavnani@arm.com>
Change-Id: Ib26fd16e420c35527204b126b9b91e8babcc3a5c
This commit is contained in:
Deepika Bhavnani 2019-12-13 10:23:18 -06:00
parent 22d12c4148
commit 5b33ad174a
25 changed files with 99 additions and 90 deletions
Download patch file Download diff file Expand all files Collapse all files

13
lib/psci/psci_main.c
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2013-2018, ARM Limited and Contributors. All rights reserved.
* Copyright (c) 2013-2019, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@ -219,16 +219,19 @@ int psci_cpu_off(void)
int psci_affinity_info(u_register_t target_affinity,
unsigned int lowest_affinity_level)
{
int target_idx;
int ret;
unsigned int target_idx;
/* We dont support level higher than PSCI_CPU_PWR_LVL */
if (lowest_affinity_level > PSCI_CPU_PWR_LVL)
return PSCI_E_INVALID_PARAMS;
/* Calculate the cpu index of the target */
target_idx = plat_core_pos_by_mpidr(target_affinity);
if (target_idx == -1)
ret = plat_core_pos_by_mpidr(target_affinity);
if (ret == -1) {
return PSCI_E_INVALID_PARAMS;
}
target_idx = (unsigned int)ret;
/*
* Generic management:
@ -245,7 +248,7 @@ int psci_affinity_info(u_register_t target_affinity,
* target CPUs shutdown was not seen by the current CPU's cluster. And
* so the cache may contain stale data for the target CPU.
*/
flush_cpu_data_by_index((unsigned int)target_idx,
flush_cpu_data_by_index(target_idx,
psci_svc_cpu_data.aff_info_state);
return psci_get_aff_info_state_by_idx(target_idx);