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| author | Marc Zyngier <[email protected]> | 2023-10-18 23:32:09 +0000 |
|---|---|---|
| committer | Oliver Upton <[email protected]> | 2023-10-20 17:52:01 +0000 |
| commit | 4288ff7ba195f49138eec0d9c4ff8c049714e918 (patch) | |
| tree | 8149edc081a71a6bd216840a914878e59513a0eb /scripts/gcc-plugins/randomize_layout_plugin.c | |
| parent | KVM: arm64: Don't zero VTTBR in __tlb_switch_to_host() (diff) | |
| download | kernel-4288ff7ba195f49138eec0d9c4ff8c049714e918.tar.gz kernel-4288ff7ba195f49138eec0d9c4ff8c049714e918.zip | |
KVM: arm64: Restore the stage-2 context in VHE's __tlb_switch_to_host()
An MMU notifier could cause us to clobber the stage-2 context loaded on
a CPU when we switch to another VM's context to invalidate. This isn't
an issue right now as the stage-2 context gets reloaded on every guest
entry, but is disastrous when moving __load_stage2() into the
vcpu_load() path.
Restore the previous stage-2 context on the way out of a TLB
invalidation if we installed something else. Deliberately do this after
TGE=1 is synchronized to keep things safe in light of the speculative AT
errata.
Signed-off-by: Marc Zyngier <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Oliver Upton <[email protected]>
Diffstat (limited to 'scripts/gcc-plugins/randomize_layout_plugin.c')
0 files changed, 0 insertions, 0 deletions