diff options
| author | Fuad Tabba <fuad.tabba@linux.dev> | 2026-07-17 14:03:14 +0100 |
|---|---|---|
| committer | Oliver Upton <oupton@kernel.org> | 2026-07-31 00:11:56 -0700 |
| commit | 1feb9f6af895c1ec0caed269108d6ffa1f9a31c4 (patch) | |
| tree | 3c09fdd4ee4700699d3cd96a51b549b4cf986fcc /include/linux/workqueue.h | |
| parent | 56fd1fc526e6413781a6980aa13ed9db104cbfea (diff) | |
KVM: arm64: Skip pKVM stage-2 flush when FWB is enabled
pkvm_pgtable_stage2_flush() cleans the D-cache for every mapping in the
range even on hardware with stage-2 Force Write-Back, where FWB keeps
guest memory coherent to the PoC and the maintenance is unnecessary. The
generic kvm_pgtable_stage2_flush() returns early in that case, but the
pKVM MMU does not, so it needlessly cleans the whole range on, e.g.,
every set/way trap.
Return early when FWB is enabled, matching the generic walker.
Fixes: e912efed485a ("KVM: arm64: Introduce the EL1 pKVM MMU")
Signed-off-by: Fuad Tabba <fuad.tabba@linux.dev>
Reviewed-by: Bradley Morgan <include@grrlz.net>
Tested-by: Bradley Morgan <include@grrlz.net> # On pixel 7, Android 17 CP2A.260705.006
Test: Bradley Morgan <include@grrlz.net> # On QEMU arm64 host
Link: https://patch.msgid.link/20260717130317.1953574-5-fuad.tabba@linux.dev
Signed-off-by: Oliver Upton <oupton@kernel.org>
Diffstat (limited to 'include/linux/workqueue.h')
0 files changed, 0 insertions, 0 deletions