This is a followp to previous iteration but implemented on top of VHE patches. Only non-VHE path is addressied by this patch. In second patch 32-bit handler is updated to keep exit handling consistent with 64-bit code, and nothing has changed.
Currently we save/restore fp/simd on each exit, the first patch optimizes arm64 save/restore, we only do so on Guest access. hackbench and several lmbench tests show anywhere from 30% to 50% of exits don't save/restore fp/simd register set. Tested on Foundation Model, unfortuntely not tested yet on VHE enabled model. Mario Smarduch (2): Optimize arm64 non-VHE fpsimd skip 30-50% save/restore on exits keep arm vfp/simd exit handling consistent with arm64 arch/arm/kvm/interrupts.S | 14 +++++----- arch/arm64/include/asm/kvm_arm.h | 5 +++- arch/arm64/kvm/hyp.S | 58 +++++++++++++++++++++++++++++++++++++--- 3 files changed, 66 insertions(+), 11 deletions(-) -- 1.9.1 _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
