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| author | Paolo Bonzini <pbonzini@redhat.com> | 2020-10-03 05:07:59 -0400 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-10-03 05:07:59 -0400 |
| commit | e2e1a1c86bf32a8d7458b9024f518cf2434414c8 (patch) | |
| tree | 8ba4d0c48ebca8c643051058197e85c8f0a615dd /arch/arm64/kvm | |
| parent | b502e6ecdc3b6d381bd72c5f879bc1e00d6fe7db (diff) | |
| parent | 452d62227958e149e5c7b0084a559c0957c3ff2a (diff) | |
Merge tag 'kvmarm-fixes-5.9-3' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into kvm-master
KVM/arm64 fixes for 5.9, take #3
- Fix synchronization of VTTBR update on TLB invalidation for nVHE systems
Diffstat (limited to 'arch/arm64/kvm')
| -rw-r--r-- | arch/arm64/kvm/hyp/nvhe/tlb.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/arm64/kvm/hyp/nvhe/tlb.c b/arch/arm64/kvm/hyp/nvhe/tlb.c index 69eae608d670..b15d65a42042 100644 --- a/arch/arm64/kvm/hyp/nvhe/tlb.c +++ b/arch/arm64/kvm/hyp/nvhe/tlb.c @@ -31,7 +31,14 @@ static void __tlb_switch_to_guest(struct kvm_s2_mmu *mmu, isb(); } + /* + * __load_guest_stage2() includes an ISB only when the AT + * workaround is applied. Take care of the opposite condition, + * ensuring that we always have an ISB, but not two ISBs back + * to back. + */ __load_guest_stage2(mmu); + asm(ALTERNATIVE("isb", "nop", ARM64_WORKAROUND_SPECULATIVE_AT)); } static void __tlb_switch_to_host(struct tlb_inv_context *cxt) |