linux-kernel - Re: [PATCH v2 08/10] KVM: arm64: guest debug, HW assisted debug support

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Message-ID: <20150414102345.GV6186@cbox>
Date:	Tue, 14 Apr 2015 12:23:45 +0200
From:	Christoffer Dall <christoffer.dall@...aro.org>
To:	Andrew Jones <drjones@...hat.com>
Cc:	Alex Bennée <alex.bennee@...aro.org>,
	kvm@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	kvmarm@...ts.cs.columbia.edu, marc.zyngier@....com,
	peter.maydell@...aro.org, agraf@...e.de, pbonzini@...hat.com,
	zhichao.huang@...aro.org, jan.kiszka@...mens.com,
	dahi@...ux.vnet.ibm.com, r65777@...escale.com, bp@...e.de,
	Gleb Natapov <gleb@...nel.org>,
	Jonathan Corbet <corbet@....net>,
	Russell King <linux@....linux.org.uk>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>,
	AKASHI Takahiro <takahiro.akashi@...aro.org>,
	Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
	"open list:DOCUMENTATION" <linux-doc@...r.kernel.org>,
	open list <linux-kernel@...r.kernel.org>,
	"open list:ABI/API" <linux-api@...r.kernel.org>
Subject: Re: [PATCH v2 08/10] KVM: arm64: guest debug, HW assisted debug
 support

On Fri, Apr 10, 2015 at 02:25:21PM +0200, Andrew Jones wrote:

[...]

> > --- a/arch/arm64/kvm/sys_regs.c
> > +++ b/arch/arm64/kvm/sys_regs.c
> > @@ -196,16 +196,49 @@ static bool trap_dbgauthstatus_el1(struct kvm_vcpu *vcpu,
> >   * - If the dirty bit is set, save guest registers, restore host
> >   *   registers and clear the dirty bit. This ensure that the host can
> >   *   now use the debug registers.
> > + *
> > + * We also use this mechanism to set-up the debug registers for guest
> setup

since I'm in this mood:

setup: noun or adjective
set-up: noun derived from the phrasal verb, example "Run! It's a set-up."
set up: verb

-Christoffer
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