diff options
Diffstat (limited to 'arch/arm64/kernel')
| -rw-r--r-- | arch/arm64/kernel/head.S | 8 | ||||
| -rw-r--r-- | arch/arm64/kernel/sleep.S | 8 |
2 files changed, 16 insertions, 0 deletions
diff --git a/arch/arm64/kernel/head.S b/arch/arm64/kernel/head.S index 3a0654173997..a055be6125cf 100644 --- a/arch/arm64/kernel/head.S +++ b/arch/arm64/kernel/head.S @@ -634,5 +634,13 @@ __enable_mmu: isb msr sctlr_el1, x0 isb + /* + * Invalidate the local I-cache so that any instructions fetched + * speculatively from the PoC are discarded, since they may have + * been dynamically patched at the PoU. + */ + ic iallu + dsb nsh + isb br x27 ENDPROC(__enable_mmu) diff --git a/arch/arm64/kernel/sleep.S b/arch/arm64/kernel/sleep.S index fb3128ea3a4f..f586f7c875e2 100644 --- a/arch/arm64/kernel/sleep.S +++ b/arch/arm64/kernel/sleep.S @@ -133,6 +133,14 @@ ENTRY(cpu_resume_mmu) ldr x3, =cpu_resume_after_mmu msr sctlr_el1, x0 // restore sctlr_el1 isb + /* + * Invalidate the local I-cache so that any instructions fetched + * speculatively from the PoC are discarded, since they may have + * been dynamically patched at the PoU. + */ + ic iallu + dsb nsh + isb br x3 // global jump to virtual address ENDPROC(cpu_resume_mmu) .popsection |
