| Message ID | 20221118182222.3932898-1-oliver.upton@linux.dev (mailing list archive) |
|---|---|
| Headers | show |
| Series | KVM: arm64: Fixes for parallel faults series | expand |
On Fri, Nov 18, 2022 at 06:22:19PM +0000, Oliver Upton wrote: > 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} and > lockdep. Applies on top of the parallel faults series picked up last > week. > > v3: https://lore.kernel.org/kvmarm/20221116165655.2649475-1-oliver.upton@linux.dev/ > > v3 -> v4: > - Return an error instead of WARN() in hyp for shared walks (Will) For the series: Acked-by: Will Deacon <will@kernel.org> Thanks! Will
On Fri, 18 Nov 2022 18:22:19 +0000, Oliver Upton wrote: > 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} and > lockdep. Applies on top of the parallel faults series picked up last > week. > > [...] Applied to next, thanks! [1/3] KVM: arm64: Take a pointer to walker data in kvm_dereference_pteref() commit: 3a5154c723ba5ceb9ce374a7307e03263c03fd29 [2/3] KVM: arm64: Don't acquire RCU read lock for exclusive table walks commit: b7833bf202e3068abb77c642a0843f696e9c8d38 [3/3] KVM: arm64: Reject shared table walks in the hyp code commit: 5e806c5812e8012a83496cf96bdba266b3aec428 Cheers, M.
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} and lockdep. Applies on top of the parallel faults series picked up last week. v3: https://lore.kernel.org/kvmarm/20221116165655.2649475-1-oliver.upton@linux.dev/ v3 -> v4: - Return an error instead of WARN() in hyp for shared walks (Will) Oliver Upton (3): KVM: arm64: Take a pointer to walker data in kvm_dereference_pteref() KVM: arm64: Don't acquire RCU read lock for exclusive table walks KVM: arm64: Reject shared table walks in the hyp code arch/arm64/include/asm/kvm_pgtable.h | 159 +++++++++++++++------------ arch/arm64/kvm/hyp/pgtable.c | 13 ++- 2 files changed, 96 insertions(+), 76 deletions(-)