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RAS: Introduce handler for EL3 EAs

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External Aborts while executing in EL3 is fatal in nature. This patch
allows for the platform to define a handler for External Aborts received
while executing in EL3. A default implementation is added which falls
back to platform unhandled exception.

Change-Id: I466f2c8113a33870f2c7d2d8f2bf20437d9fd354
Signed-off-by: Jeenu Viswambharan <jeenu.viswambharan@arm.com>
This commit is contained in:
Jeenu Viswambharan 2018-07-06 16:50:06 +01:00
parent d5a23af50f
commit eaeaa4d048
2 changed files with 11 additions and 2 deletions
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4
bl31/aarch64/runtime_exceptions.S
View file

@ -213,7 +213,7 @@ end_vector_entry fiq_sp_el0
vector_entry serror_sp_el0 vector_entry serror_sp_el0
b report_unhandled_exception no_ret plat_handle_el3_ea
end_vector_entry serror_sp_el0 end_vector_entry serror_sp_el0
/* --------------------------------------------------------------------- /* ---------------------------------------------------------------------
@ -239,7 +239,7 @@ vector_entry fiq_sp_elx
end_vector_entry fiq_sp_elx end_vector_entry fiq_sp_elx
vector_entry serror_sp_elx vector_entry serror_sp_elx
b report_unhandled_exception no_ret plat_handle_el3_ea
end_vector_entry serror_sp_elx end_vector_entry serror_sp_elx
/* --------------------------------------------------------------------- /* ---------------------------------------------------------------------

9
plat/common/aarch64/platform_helpers.S
View file

@ -22,6 +22,7 @@
.weak plat_handle_uncontainable_ea .weak plat_handle_uncontainable_ea
.weak plat_handle_double_fault .weak plat_handle_double_fault
.weak plat_handle_el3_ea
#if !ENABLE_PLAT_COMPAT #if !ENABLE_PLAT_COMPAT
.globl platform_get_core_pos .globl platform_get_core_pos
@ -212,3 +213,11 @@ endfunc plat_handle_uncontainable_ea
func plat_handle_double_fault func plat_handle_double_fault
b report_unhandled_exception b report_unhandled_exception
endfunc plat_handle_double_fault endfunc plat_handle_double_fault
/* -----------------------------------------------------
* Platform handler for EL3 External Abort.
* -----------------------------------------------------
*/
func plat_handle_el3_ea
b report_unhandled_exception
endfunc plat_handle_el3_ea