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| author | Mario Smarduch <m.smarduch@samsung.com> | 2015-07-16 22:29:37 +0100 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2015-08-19 22:25:19 +0100 |
| commit | 33c76a0b8126946026fa1122cb774553afae0956 (patch) | |
| tree | 1ea5e6afabc2d383755984064899857928c71f43 /arch/arm64/include/asm/futex.h | |
| parent | f120cd6533d21075ab103ae6c225b1697853660d (diff) | |
| download | talos-op-linux-33c76a0b8126946026fa1122cb774553afae0956.tar.gz talos-op-linux-33c76a0b8126946026fa1122cb774553afae0956.zip | |
arm64: KVM: Optimize arm64 skip 30-50% vfp/simd save/restore on exits
This patch only saves and restores FP/SIMD registers on Guest access. To do
this cptr_el2 FP/SIMD trap is set on Guest entry and later checked on exit.
lmbench, hackbench show significant improvements, for 30-50% exits FP/SIMD
context is not saved/restored
[chazy/maz: fixed save/restore logic for 32bit guests]
Signed-off-by: Mario Smarduch <m.smarduch@samsung.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'arch/arm64/include/asm/futex.h')
0 files changed, 0 insertions, 0 deletions
