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[v3,0/2] KVM: arm64: Fixes for parallel faults series

Message ID 20221116165655.2649475-1-oliver.upton@linux.dev (mailing list archive)
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Series KVM: arm64: Fixes for parallel faults series | expand

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Oliver Upton Nov. 16, 2022, 4:56 p.m. UTC 
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@linux.dev/

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(-)