diff options
| author | Will Deacon <will@kernel.org> | 2020-09-18 11:54:33 +0100 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2020-09-29 16:08:16 +0100 |
| commit | c28762070ca651fe7a981b8f31d972c9b7d2c386 (patch) | |
| tree | 907e7cdfc0461b55880ac1ecccc54e460797f219 /arch/arm64/include/asm/spectre.h | |
| parent | 9e78b659b4539ee20fd0c415cf8c231cea59e9c0 (diff) | |
arm64: Rewrite Spectre-v4 mitigation code
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>
Diffstat (limited to 'arch/arm64/include/asm/spectre.h')
| -rw-r--r-- | arch/arm64/include/asm/spectre.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/spectre.h b/arch/arm64/include/asm/spectre.h index b776abe28dff..fcdfbce302bd 100644 --- a/arch/arm64/include/asm/spectre.h +++ b/arch/arm64/include/asm/spectre.h @@ -24,4 +24,9 @@ enum mitigation_state arm64_get_spectre_v2_state(void); bool has_spectre_v2(const struct arm64_cpu_capabilities *cap, int scope); void spectre_v2_enable_mitigation(const struct arm64_cpu_capabilities *__unused); +enum mitigation_state arm64_get_spectre_v4_state(void); +bool has_spectre_v4(const struct arm64_cpu_capabilities *cap, int scope); +void spectre_v4_enable_mitigation(const struct arm64_cpu_capabilities *__unused); +void spectre_v4_enable_task_mitigation(struct task_struct *tsk); + #endif /* __ASM_SPECTRE_H */ |