lkml.org 
[lkml]   [2016]   [Oct]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCH 0/2] arm64: Support systems without FP/ASIMD
Date
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

\
 
 \ /
  Last update: 2016-10-25 15:51    [W:0.031 / U:3.860 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site