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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 Critical SDEI events on the platform. This must have a lower value (therefore of
higher priority) than ``PLAT_SDEI_NORMAL_PRI``. higher priority) than ``PLAT_SDEI_NORMAL_PRI``.
It's recommended that SDEI exception priorities in general are assigned the **Note**: SDEI exception priorities must be the lowest among Secure priorities.
lowest among Secure priorities. Among the SDEI exceptions, Critical SDEI Among the SDEI exceptions, Critical SDEI priority must be higher than Normal
priority must be higher than Normal SDEI priority. SDEI priority.
Functions 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 * 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(); unsigned int client_el = sdei_client_el();
/* Return error if called without an active event */ /* Return error if called without an active event */
disp_ctx = pop_dispatch(); disp_ctx = get_outstanding_dispatch();
if (!disp_ctx) if (!disp_ctx)
return SDEI_EDENY; return SDEI_EDENY;
@ -566,15 +566,8 @@ int sdei_event_complete(int resume, uint64_t pc)
map = disp_ctx->map; map = disp_ctx->map;
assert(map); assert(map);
se = get_event_entry(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; act = resume ? DO_COMPLETE_RESUME : DO_COMPLETE;
if (!can_sdei_state_trans(se, act)) { if (!can_sdei_state_trans(se, act)) {
if (is_event_shared(map)) if (is_event_shared(map))
@ -582,6 +575,15 @@ int sdei_event_complete(int resume, uint64_t pc)
return SDEI_EDENY; 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, * Restore Non-secure to how it was originally interrupted. Once done,
* it's up-to-date with the saved copy. * it's up-to-date with the saved copy.