The code that detects SSBS support when querying SMCCC_ARCH_WORKAROUND_2 as part of SMCCC_ARCH_FEATURES will wrongly report to the caller the presence of SSBS. This is not a security issue just a potential performance regression on CPUs that implement dynamic mitigation for CVE-2018-3639.
The code that detects SSBS support when querying SMCCC_ARCH_WORKAROUND_2 as part of SMCCC_ARCH_FEATURES will wrongly report to the caller the presence of SSBS. This is not a security issue just a potential performance regression on CPUs that implement dynamic mitigation for CVE-2018-3639.