From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoffer Dall Subject: Re: [RFC v3 08/10] KVM: arm/arm64: Set up a background timer for the physical timer emulation Date: Thu, 2 Feb 2017 11:30:58 +0100 Message-ID: <20170202103058.GG27852@cbox> References: <1485970990-13775-1-git-send-email-jintack@cs.columbia.edu> <1485970990-13775-9-git-send-email-jintack@cs.columbia.edu> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: kvm@vger.kernel.org, marc.zyngier@arm.com, catalin.marinas@arm.com, will.deacon@arm.com, linux@armlinux.org.uk, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, andre.przywara@arm.com, pbonzini@redhat.com, kvmarm@lists.cs.columbia.edu To: Jintack Lim Return-path: Content-Disposition: inline In-Reply-To: <1485970990-13775-9-git-send-email-jintack@cs.columbia.edu> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu List-Id: kvm.vger.kernel.org On Wed, Feb 01, 2017 at 12:43:08PM -0500, Jintack Lim wrote: > Set a background timer for the EL1 physical timer emulation while VMs > are running, so that VMs get the physical timer interrupts in a timely > manner. > > Schedule the background timer on entry to the VM and cancel it on exit. > This would not have any performance impact to the guest OSes that > currently use the virtual timer since the physical timer is always not > enabled. > > Signed-off-by: Jintack Lim Reviewed-by: Christoffer Dall