mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-15 06:55:13 +08:00
1dd498e5e2
Cortex-A510's erratum #2077057 causes SPSR_EL2 to be corrupted when
single-stepping authenticated ERET instructions. A single step is
expected, but a pointer authentication trap is taken instead. The
erratum causes SPSR_EL1 to be copied to SPSR_EL2, which could allow
EL1 to cause a return to EL2 with a guest controlled ELR_EL2.
Because the conditions require an ERET into active-not-pending state,
this is only a problem for the EL2 when EL2 is stepping EL1. In this case
the previous SPSR_EL2 value is preserved in struct kvm_vcpu, and can be
restored.
Cc: stable@vger.kernel.org #
|
||
|---|---|---|
| .. | ||
| acpi_object_usage.rst | ||
| amu.rst | ||
| arm-acpi.rst | ||
| asymmetric-32bit.rst | ||
| booting.rst | ||
| cpu-feature-registers.rst | ||
| elf_hwcaps.rst | ||
| features.rst | ||
| hugetlbpage.rst | ||
| index.rst | ||
| kasan-offsets.sh | ||
| legacy_instructions.rst | ||
| memory-tagging-extension.rst | ||
| memory.rst | ||
| perf.rst | ||
| pointer-authentication.rst | ||
| silicon-errata.rst | ||
| sve.rst | ||
| tagged-address-abi.rst | ||
| tagged-pointers.rst | ||