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linux-next/arch/arm64/kvm/hyp
Suzuki K Poulose 82e0191a1a arm64: Support systems without FP/ASIMD
The arm64 kernel assumes that FP/ASIMD units are always present
and accesses the FP/ASIMD specific registers unconditionally. This
could cause problems when they are absent. This patch adds the
support for kernel handling systems without FP/ASIMD by skipping the
register access within the kernel. For kvm, we trap the accesses
to FP/ASIMD and inject an undefined instruction exception to the VM.

The callers of the exported kernel_neon_begin_partial() should
make sure that the FP/ASIMD is supported.

Cc: Will Deacon <will.deacon@arm.com>
Cc: Christoffer Dall <christoffer.dall@linaro.org>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
[catalin.marinas@arm.com: add comment on the ARM64_HAS_NO_FPSIMD conflict and the new location]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2016-11-16 18:05:10 +00:00
..
debug-sr.c KVM: arm/arm64: Get rid of exported aliases to static functions 2016-09-08 12:53:00 +02:00
entry.S arm64: KVM: Handle async aborts delivered while at EL2 2016-09-08 12:53:00 +02:00
fpsimd.S arm64: KVM: Implement fpsimd save/restore 2015-12-14 11:30:41 +00:00
hyp-entry.S arm64: Support systems without FP/ASIMD 2016-11-16 18:05:10 +00:00
Makefile arm64: KVM: Move vgic-v3 save/restore to virt/kvm/arm/hyp 2016-09-22 13:21:46 +02:00
s2-setup.c kvm: arm64: Enable hardware updates of the Access Flag for Stage 2 page tables 2016-05-09 22:23:08 +02:00
switch.c arm64: Support systems without FP/ASIMD 2016-11-16 18:05:10 +00:00
sysreg-sr.c arm64: KVM: VHE: Context switch MDSCR_EL1 2016-07-23 18:07:12 +02:00
tlb.c KVM: arm/arm64: Get rid of exported aliases to static functions 2016-09-08 12:53:00 +02:00