arm64: Rewrite Spectre-v4 mitigation code

Browse source

Rewrite the Spectre-v4 mitigation handling code to follow the same
approach as that taken by Spectre-v2.

For now, report to KVM that the system is vulnerable (by forcing
'ssbd_state' to ARM64_SSBD_UNKNOWN), as this will be cleared up in
subsequent steps.

Signed-off-by: Will Deacon <will@kernel.org>

...

This commit is contained in:

Will Deacon 2020-09-18 11:54:33 +01:00

parent 9e78b659b4

commit c28762070c

9 changed files with 401 additions and 352 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

19

arch/arm64/include/asm/processor.h

View file

5

arch/arm64/include/asm/spectre.h

View file

217

arch/arm64/kernel/cpu_errata.c

View file

41

arch/arm64/kernel/cpufeature.c

View file

6

arch/arm64/kernel/entry.S

View file

6

arch/arm64/kernel/hibernate.c

View file

17

arch/arm64/kernel/process.c

View file

447

arch/arm64/kernel/proton-pack.c

View file

3

arch/arm64/kernel/suspend.c

View file