From mboxrd@z Thu Jan 1 00:00:00 1970 From: marc.zyngier@arm.com (Marc Zyngier) Date: Thu, 18 Jun 2015 18:04:14 +0100 Subject: [PATCH v2 1/2] arm64: KVM: Optimize arm64 fp/simd save/restore In-Reply-To: <1434491452-19177-2-git-send-email-m.smarduch@samsung.com> References: <1434491452-19177-1-git-send-email-m.smarduch@samsung.com> <1434491452-19177-2-git-send-email-m.smarduch@samsung.com> Message-ID: <5582FA0E.6030409@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On 16/06/15 22:50, Mario Smarduch wrote: > 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 > > Signed-off-by: Mario Smarduch Looks nice and clean. Reviewed-by: Marc Zyngier Thanks, M. -- Jazz is not dead. It just smells funny... From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marc Zyngier Subject: Re: [PATCH v2 1/2] arm64: KVM: Optimize arm64 fp/simd save/restore Date: Thu, 18 Jun 2015 18:04:14 +0100 Message-ID: <5582FA0E.6030409@arm.com> References: <1434491452-19177-1-git-send-email-m.smarduch@samsung.com> <1434491452-19177-2-git-send-email-m.smarduch@samsung.com> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1434491452-19177-2-git-send-email-m.smarduch@samsung.com> Sender: kvm-owner@vger.kernel.org To: Mario Smarduch , "kvmarm@lists.cs.columbia.edu" , "christoffer.dall@linaro.org" Cc: "linux-arm-kernel@lists.infradead.org" , "kvm@vger.kernel.org" , Catalin Marinas , Will Deacon List-Id: kvmarm@lists.cs.columbia.edu On 16/06/15 22:50, Mario Smarduch wrote: > 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 > > Signed-off-by: Mario Smarduch Looks nice and clean. Reviewed-by: Marc Zyngier Thanks, M. -- Jazz is not dead. It just smells funny...