Small set of fixes for the parallel faults series. Most importantly,
stop taking the RCU read lock for walking hyp stage-1. For the sake of
consistency, take a pointer to kvm_pgtable_walker in
kvm_dereference_pteref() as well.
Tested on an Ampere Altra system with kvm-arm.mode={nvhe,protected}.
Applies to the parallel faults series picked up last week.
v2: https://lore.kernel.org/kvmarm/20221115225502.2240227-1-oliver.upton@xxxxxxxxx/
v2 -> v3:
- Pass a pointer to the walker instead of a bool (Marc)
- Apply the aforementioned change to kvm_dereference_pteref()
Oliver Upton (2):
KVM: arm64: Take a pointer to walker data in kvm_dereference_pteref()
KVM: arm64: Don't acquire RCU read lock for exclusive table walks
arch/arm64/include/asm/kvm_pgtable.h | 154 +++++++++++++++------------
arch/arm64/kvm/hyp/pgtable.c | 10 +-
2 files changed, 88 insertions(+), 76 deletions(-)
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2.38.1.431.g37b22c650d-goog
