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| author | Madhukar Pappireddy <madhukar.pappireddy@arm.com> | 2021-09-08 00:04:15 +0200 |
|---|---|---|
| committer | TrustedFirmware Code Review <review@review.trustedfirmware.org> | 2021-09-08 00:04:15 +0200 |
| commit | a138717d9e6be47565d94082cb068f6345a140ba (patch) | |
| tree | 801e32770711b84929f3b81d2626936fc1df969c /docs | |
| parent | dc8b361c780634ed2cc78ec0067c8986cb242f30 (diff) | |
| parent | 3017e932768c7357a1a41493c58323419e9a1ec9 (diff) | |
| download | arm-trusted-firmware-a138717d9e6be47565d94082cb068f6345a140ba.tar.gz | |
Merge changes from topic "advk-serror" into integration
* changes:
fix(plat/marvell/a3k): disable HANDLE_EA_EL3_FIRST by default
fix(plat/marvell/a3k): update information about PCIe abort hack
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/plat/marvell/armada/build.rst | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/docs/plat/marvell/armada/build.rst b/docs/plat/marvell/armada/build.rst index 8af27b1b5..b12514469 100644 --- a/docs/plat/marvell/armada/build.rst +++ b/docs/plat/marvell/armada/build.rst @@ -153,6 +153,29 @@ A7K/8K/CN913x specific build options: Armada37x0 specific build options: +- HANDLE_EA_EL3_FIRST + + 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). + + Otherwise when ``HANDLE_EA_EL3_FIRST=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. + + Mentioned bug in pci-aardvark.c driver is fixed in U-Boot version v2021.07 and Linux kernel + version v5.13 (workarounded since Linux kernel version 5.9) and also backported in Linux + kernel stable releases since versions v5.12.13, v5.10.46, v5.4.128, v4.19.198, v4.14.240. + + If target system has already patched version of U-Boot and Linux kernel then it is strongly + 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. + - CM3_SYSTEM_RESET When ``CM3_SYSTEM_RESET=1``, the Cortex-M3 secure coprocessor will be used for system reset. |