fix(ras): restrict RAS support for NS world
Current RAS framework in TF-A only supports handling errors originating
from NS world but the HANDLE_EA_EL3_FIRST flag configures it for all
lower Els. To make the current design of RAS explicit, rename this macro
to HANDLE_EA_EL3_FIRST_NS and set EA bit in scr_el3 only when
switching to NS world.
Note: I am unaware of any platform which traps errors originating in
Secure world to EL3, if there is any such platform then it need to
be explicitly implemented in TF-A
Signed-off-by: Manish Pandey <manish.pandey2@arm.com>
Change-Id: If58eb201d8fa792c16325c85c26056e9b409b750
diff --git a/docs/plat/marvell/armada/build.rst b/docs/plat/marvell/armada/build.rst
index adb9603..ff7b573 100644
--- a/docs/plat/marvell/armada/build.rst
+++ b/docs/plat/marvell/armada/build.rst
@@ -165,14 +165,14 @@
Armada37x0 specific build options:
-- HANDLE_EA_EL3_FIRST
+- HANDLE_EA_EL3_FIRST_NS
- When ``HANDLE_EA_EL3_FIRST=1``, External Aborts and SError Interrupts will be always trapped
- in TF-A. TF-A in this case enables dirty hack / workaround for a bug found in U-Boot and
- Linux kernel PCIe controller driver pci-aardvark.c, traps and then masks SError interrupt
- caused by AXI SLVERR on external access (syndrome 0xbf000002).
+ When ``HANDLE_EA_EL3_FIRST_NS=1``, External Aborts and SError Interrupts, resulting from errors
+ in NS world, will be always trapped in TF-A. TF-A in this case enables dirty hack / workaround for
+ a bug found in U-Boot and Linux kernel PCIe controller driver pci-aardvark.c, traps and then masks
+ SError interrupt caused by AXI SLVERR on external access (syndrome 0xbf000002).
- Otherwise when ``HANDLE_EA_EL3_FIRST=0``, these exceptions will be trapped in the current
+ Otherwise when ``HANDLE_EA_EL3_FIRST_NS=0``, these exceptions will be trapped in the current
exception level (or in EL1 if the current exception level is EL0). So exceptions caused by
U-Boot will be trapped in U-Boot, exceptions caused by Linux kernel (or user applications)
will be trapped in Linux kernel.
@@ -185,8 +185,8 @@
recommended to not enable this workaround as it disallows propagating of all External Aborts
to running Linux kernel and makes correctable errors as fatal aborts.
- This option is now disabled by default. In past this option was enabled by default in
- TF-A versions v2.2, v2.3, v2.4 and v2.5.
+ This option is now disabled by default. In past this option has different name "HANDLE_EA_EL3_FIRST" and
+ was enabled by default in TF-A versions v2.2, v2.3, v2.4 and v2.5.
- CM3_SYSTEM_RESET