bcm63xx/atf/lib/cpus/aarch64/cortex_a75.S, branch master

Add compile-time errors for HW_ASSISTED_COHERENCY flag

2019-05-03T13:23:55Z

This patch fixes this issue: https://github.com/ARM-software/tf-issues/issues/660 The introduced changes are the following: 1) Some cores implement cache coherency maintenance operation on the hardware level. For those cores, such as - but not only - the DynamIQ cores, it is mandatory that TF-A is compiled with the HW_ASSISTED_COHERENCY flag. If not, the core behaviour at runtime is unpredictable. To prevent this, compile time checks have been added and compilation errors are generated, if needed. 2) To enable this change for FVP, a logical separation has been done for the core libraries. A system cannot contain cores of both groups, i.e. cores that manage coherency on hardware and cores that don't do it. As such, depending on the HW_ASSISTED_COHERENCY flag, FVP includes the libraries only of the relevant cores. 3) The neoverse_e1.S file has been added to the FVP sources. Change-Id: I787d15819b2add4ec0d238249e04bf0497dc12f3 Signed-off-by: John Tsichritzis

DSU: Implement workaround for errata 798953

2019-04-17T12:46:43Z

Under certain near idle conditions, DSU may miss response transfers on the ACE master or Peripheral port, leading to deadlock. This workaround disables high-level clock gating of the DSU to prevent this. Change-Id: I820911d61570bacb38dd325b3519bc8d12caa14b Signed-off-by: Louis Mayencourt

Add workaround for errata 790748 for Cortex-A75

2019-02-26T16:20:59Z

Internal timing conditions might cause the CPU to stop processing interrupts. Set bit 13 of CPUACTLR_EL1 to prevent this. Change-Id: Ifdd19dbcdb71bb0d9609cab1315c478aaedb03ba Signed-off-by: Louis Mayencourt

Add workaround for errata 764081 of Cortex-A75

2019-02-26T15:53:57Z

Implicit Error Synchronization Barrier (IESB) might not be correctly generated in Cortex-A75 r0p0. To prevent this, IESB are enabled at all expection levels. Change-Id: I2a1a568668a31e4f3f38d0fba1d632ad9939e5ad Signed-off-by: Louis Mayencourt

DSU erratum 936184 workaround

2018-08-17T09:34:43Z

If the system is in near idle conditions, this erratum could cause a deadlock or data corruption. This patch applies the workaround that prevents this. This DSU erratum affects only the DSUs that contain the ACP interface and it was fixed in r2p0. The workaround is applied only to the DSUs that are actually affected. Link to respective Arm documentation: http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.epm138168/index.html Change-Id: I033213b3077685130fc1e3f4f79c4d15d7483ec9 Signed-off-by: John Tsichritzis

cpulib: Add ISBs or comment why they are unneeded

2018-06-19T09:34:51Z

Change-Id: I18a41bb9fedda635c3c002a7f112578808410ef6 Signed-off-by: Dimitris Papastamos

Add support for dynamic mitigation for CVE-2018-3639

2018-05-23T11:45:48Z

Some CPUS may benefit from using a dynamic mitigation approach for CVE-2018-3639. A new SMC interface is defined to allow software executing in lower ELs to enable or disable the mitigation for their execution context. It should be noted that regardless of the state of the mitigation for lower ELs, code executing in EL3 is always mitigated against CVE-2018-3639. NOTE: This change is a compatibility break for any platform using the declare_cpu_ops_workaround_cve_2017_5715 macro. Migrate to the declare_cpu_ops_wa macro instead. Change-Id: I3509a9337ad217bbd96de9f380c4ff8bf7917013 Signed-off-by: Dimitris Papastamos

Implement static workaround for CVE-2018-3639

2018-05-23T11:45:48Z

For affected CPUs, this approach enables the mitigation during EL3 initialization, following every PE reset. No mechanism is provided to disable the mitigation at runtime. This approach permanently mitigates the entire software stack and no additional mitigation code is required in other software components. TF-A implements this approach for the following affected CPUs: * Cortex-A57 and Cortex-A72, by setting bit 55 (Disable load pass store) of `CPUACTLR_EL1` (`S3_1_C15_C2_0`). * Cortex-A73, by setting bit 3 of `S3_0_C15_C0_0` (not documented in the Technical Reference Manual (TRM)). * Cortex-A75, by setting bit 35 (reserved in TRM) of `CPUACTLR_EL1` (`S3_0_C15_C1_0`). Additionally, a new SMC interface is implemented to allow software executing in lower ELs to discover whether the system is mitigated against CVE-2018-3639. Refer to "Firmware interfaces for mitigating cache speculation vulnerabilities System Software on Arm Systems"[0] for more information. [0] https://developer.arm.com/cache-speculation-vulnerability-firmware-specification Change-Id: I084aa7c3bc7c26bf2df2248301270f77bed22ceb Signed-off-by: Dimitris Papastamos

Rename symbols and files relating to CVE-2017-5715

2018-05-23T11:45:48Z

This patch renames symbols and files relating to CVE-2017-5715 to make it easier to introduce new symbols and files for new CVE mitigations. Change-Id: I24c23822862ca73648c772885f1690bed043dbc7 Signed-off-by: Dimitris Papastamos

Fixup `SMCCC_ARCH_FEATURES` semantics

2018-03-14T11:19:53Z

When querying `SMCCC_ARCH_WORKAROUND_1` through `SMCCC_ARCH_FEATURES`, return either: * -1 to indicate the PE on which `SMCCC_ARCH_FEATURES` is called requires firmware mitigation for CVE-2017-5715 but the mitigation is not compiled in. * 0 to indicate that firmware mitigation is required, or * 1 to indicate that no firmware mitigation is required. This patch complies with v1.2 of the firmware interfaces specification (ARM DEN 0070A). Change-Id: Ibc32d6620efdac6c340758ec502d95554a55f02a Signed-off-by: Dimitris Papastamos