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Groups > linux.kernel > #1508312
| From | Suzuki K Poulose <suzuki.poulose@arm.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 0/2] arm64: Support systems without FP/ASIMD |
| Date | 2016-10-25 16:00 +0200 |
| Message-ID | <swaqJ-6ln-3@gated-at.bofh.it> (permalink) |
| Organization | linux.* mail to news gateway |
This series adds supports to the kernel and KVM hyp to handle systems without FP/ASIMD properly. At the moment the kernel doesn't check if the FP unit is available before accessing the registers (e.g during context switch). Also for KVM, we trap the FP/ASIMD accesses and handle it by injecting an undefined instruction into the VM on systems without FP. Tested on a FVP_Base-AEM-v8A model by disabling VFP on at least one CPU ( -C clusterX.cpuY.vfp-present=0 ). Suzuki K Poulose (2): arm64: Add hypervisor safe helper for checking constant capabilities arm64: Support systems without FP/ASIMD arch/arm64/crypto/aes-ce-ccm-glue.c | 2 +- arch/arm64/crypto/aes-ce-cipher.c | 2 ++ arch/arm64/crypto/ghash-ce-glue.c | 2 ++ arch/arm64/crypto/sha1-ce-glue.c | 2 ++ arch/arm64/include/asm/cpufeature.h | 24 ++++++++++++++++++++---- arch/arm64/include/asm/neon.h | 3 ++- arch/arm64/kernel/cpufeature.c | 15 +++++++++++++++ arch/arm64/kernel/fpsimd.c | 14 ++++++++++++++ arch/arm64/kvm/handle_exit.c | 11 +++++++++++ arch/arm64/kvm/hyp/hyp-entry.S | 9 ++++++++- arch/arm64/kvm/hyp/switch.c | 5 ++++- 11 files changed, 81 insertions(+), 8 deletions(-) -- 2.7.4
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[PATCH 0/2] arm64: Support systems without FP/ASIMD Suzuki K Poulose <suzuki.poulose@arm.com> - 2016-10-25 16:00 +0200
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