diff options
| author | Jeenu Viswambharan <jeenu.viswambharan@arm.com> | 2017-12-08 12:13:51 +0000 |
|---|---|---|
| committer | Jeenu Viswambharan <jeenu.viswambharan@arm.com> | 2018-05-04 08:33:17 +0100 |
| commit | 1a7c1cfe70d5cd6e43e7d292eecbc1b4beaae678 (patch) | |
| tree | a08dba626532ab568e8df57d52e30b760b599a8d | |
| parent | ca6d9185829794f9d58dde706f94425a5c2cd9ef (diff) | |
RAS: Add fault injection support
The ARMv8.4 RAS extensions introduce architectural support for software
to inject faults into the system in order to test fault-handling
software. This patch introduces the build option FAULT_HANDLING_SUPPORT
to allow for lower ELs to use registers in the Standard Error Record to
inject fault. The build option RAS_EXTENSIONS must also be enabled along
with fault injection.
This feature is intended for testing purposes only, and is advisable to
keep disabled for production images.
Change-Id: I6f7a4454b15aec098f9505a10eb188c2f928f7ea
Signed-off-by: Jeenu Viswambharan <jeenu.viswambharan@arm.com>
| -rw-r--r-- | Makefile | 9 | ||||
| -rw-r--r-- | docs/user-guide.rst | 8 | ||||
| -rw-r--r-- | include/lib/aarch64/arch.h | 1 | ||||
| -rw-r--r-- | lib/el3_runtime/aarch64/context_mgmt.c | 5 | ||||
| -rw-r--r-- | make_helpers/defaults.mk | 3 |
5 files changed, 26 insertions, 0 deletions
@@ -395,6 +395,13 @@ ifeq ($(RAS_EXTENSION),1) endif endif +# When FAULT_INJECTION_SUPPORT is used, require that RAS_EXTENSION is enabled +ifeq ($(FAULT_INJECTION_SUPPORT),1) + ifneq ($(RAS_EXTENSION),1) + $(error For FAULT_INJECTION_SUPPORT, RAS_EXTENSION must also be 1) + endif +endif + ################################################################################ # Process platform overrideable behaviour ################################################################################ @@ -522,6 +529,7 @@ $(eval $(call assert_boolean,ENABLE_SPE_FOR_LOWER_ELS)) $(eval $(call assert_boolean,ENABLE_SPM)) $(eval $(call assert_boolean,ENABLE_SVE_FOR_NS)) $(eval $(call assert_boolean,ERROR_DEPRECATED)) +$(eval $(call assert_boolean,FAULT_INJECTION_SUPPORT)) $(eval $(call assert_boolean,GENERATE_COT)) $(eval $(call assert_boolean,GICV2_G0_FOR_EL3)) $(eval $(call assert_boolean,HANDLE_EA_EL3_FIRST)) @@ -571,6 +579,7 @@ $(eval $(call add_define,ENABLE_SPE_FOR_LOWER_ELS)) $(eval $(call add_define,ENABLE_SPM)) $(eval $(call add_define,ENABLE_SVE_FOR_NS)) $(eval $(call add_define,ERROR_DEPRECATED)) +$(eval $(call add_define,FAULT_INJECTION_SUPPORT)) $(eval $(call add_define,GICV2_G0_FOR_EL3)) $(eval $(call add_define,HANDLE_EA_EL3_FIRST)) $(eval $(call add_define,HW_ASSISTED_COHERENCY)) diff --git a/docs/user-guide.rst b/docs/user-guide.rst index 880fe7d9..a1719ef2 100644 --- a/docs/user-guide.rst +++ b/docs/user-guide.rst @@ -390,6 +390,14 @@ Common build options handled at EL3, and a panic will result. This is supported only for AArch64 builds. +- ``FAULT_INJECTION_SUPPORT``: ARMv8.4 externsions introduced support for fault + injection from lower ELs, and this build option enables lower ELs to use + Error Records accessed via System Registers to inject faults. This is + applicable only to AArch64 builds. + + This feature is intended for testing purposes only, and is advisable to keep + disabled for production images. + - ``FIP_NAME``: This is an optional build option which specifies the FIP filename for the ``fip`` target. Default is ``fip.bin``. diff --git a/include/lib/aarch64/arch.h b/include/lib/aarch64/arch.h index e836db1e..92bb97d5 100644 --- a/include/lib/aarch64/arch.h +++ b/include/lib/aarch64/arch.h @@ -215,6 +215,7 @@ /* SCR definitions */ #define SCR_RES1_BITS ((U(1) << 4) | (U(1) << 5)) +#define SCR_FIEN_BIT (U(1) << 21) #define SCR_TWE_BIT (U(1) << 13) #define SCR_TWI_BIT (U(1) << 12) #define SCR_ST_BIT (U(1) << 11) diff --git a/lib/el3_runtime/aarch64/context_mgmt.c b/lib/el3_runtime/aarch64/context_mgmt.c index 2608d1fc..76eecc18 100644 --- a/lib/el3_runtime/aarch64/context_mgmt.c +++ b/lib/el3_runtime/aarch64/context_mgmt.c @@ -114,6 +114,11 @@ static void cm_init_context_common(cpu_context_t *ctx, const entry_point_info_t scr_el3 &= ~SCR_EA_BIT; #endif +#if FAULT_INJECTION_SUPPORT + /* Enable fault injection from lower ELs */ + scr_el3 |= SCR_FIEN_BIT; +#endif + #ifdef IMAGE_BL31 /* * SCR_EL3.IRQ, SCR_EL3.FIQ: Enable the physical FIQ and IRQ rounting as diff --git a/make_helpers/defaults.mk b/make_helpers/defaults.mk index 791a9c08..4bbff034 100644 --- a/make_helpers/defaults.mk +++ b/make_helpers/defaults.mk @@ -76,6 +76,9 @@ EL3_EXCEPTION_HANDLING := 0 # Build flag to treat usage of deprecated platform and framework APIs as error. ERROR_DEPRECATED := 0 +# Fault injection support +FAULT_INJECTION_SUPPORT := 0 + # Byte alignment that each component in FIP is aligned to FIP_ALIGN := 0 |