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Merge pull request #1283 from jeenu-arm/sdei-fixes

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SDEI fixes
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davidcunado-arm 2018-02-27 23:24:30 +00:00 • committed by GitHub
commit b39d2896b3
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2 changed files with 14 additions and 12 deletions
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6
docs/porting-guide.rst
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@ -2022,9 +2022,9 @@ This macro must be defined to the EL3 exception priority level associated with
Critical SDEI events on the platform. This must have a lower value (therefore of
higher priority) than ``PLAT_SDEI_NORMAL_PRI``.
It's recommended that SDEI exception priorities in general are assigned the
lowest among Secure priorities. Among the SDEI exceptions, Critical SDEI
priority must be higher than Normal SDEI priority.
**Note**: SDEI exception priorities must be the lowest among Secure priorities.
Among the SDEI exceptions, Critical SDEI priority must be higher than Normal
SDEI priority.
Functions
.........

20
services/std_svc/sdei/sdei_intr_mgmt.c
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
* Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@ -556,7 +556,7 @@ int sdei_event_complete(int resume, uint64_t pc)
unsigned int client_el = sdei_client_el();
/* Return error if called without an active event */
disp_ctx = pop_dispatch();
disp_ctx = get_outstanding_dispatch();
if (!disp_ctx)
return SDEI_EDENY;
@ -566,15 +566,8 @@ int sdei_event_complete(int resume, uint64_t pc)
map = disp_ctx->map;
assert(map);
se = get_event_entry(map);
SDEI_LOG("EOI:%lx, %d spsr:%lx elr:%lx\n", read_mpidr_el1(),
map->ev_num, read_spsr_el3(), read_elr_el3());
if (is_event_shared(map))
sdei_map_lock(map);
act = resume ? DO_COMPLETE_RESUME : DO_COMPLETE;
if (!can_sdei_state_trans(se, act)) {
if (is_event_shared(map))
@ -582,6 +575,15 @@ int sdei_event_complete(int resume, uint64_t pc)
return SDEI_EDENY;
}
/* Having done sanity checks, pop dispatch */
pop_dispatch();
SDEI_LOG("EOI:%lx, %d spsr:%lx elr:%lx\n", read_mpidr_el1(),
map->ev_num, read_spsr_el3(), read_elr_el3());
if (is_event_shared(map))
sdei_map_lock(map);
/*
* Restore Non-secure to how it was originally interrupted. Once done,
* it's up-to-date with the saved copy.