linux-kernel - Re: [PATCH] arm64: KVM: export demux regids as KVM_REG

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Message-ID: <20140704101302.GD20451@cbox>
Date:	Fri, 4 Jul 2014 03:13:02 -0700
From:	Christoffer Dall <christoffer.dall@...aro.org>
To:	Marc Zyngier <marc.zyngier@....com>
Cc:	Alex Bennée <alex.bennee@...aro.org>,
	"kvmarm@...ts.cs.columbia.edu" <kvmarm@...ts.cs.columbia.edu>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"kvm@...r.kernel.org" <kvm@...r.kernel.org>,
	Gleb Natapov <gleb@...nel.org>,
	Paolo Bonzini <pbonzini@...hat.com>,
	Catalin Marinas <Catalin.Marinas@....com>,
	Will Deacon <Will.Deacon@....com>,
	open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] arm64: KVM: export demux regids as KVM_REG_ARM64

On Tue, Jul 01, 2014 at 04:56:50PM +0100, Marc Zyngier wrote:
> On 01/07/14 16:53, Alex Bennée wrote:
> > I suspect this is a -ECUTPASTE fault from the initial implementation. If
> > we don't declare the register ID to be KVM_REG_ARM64 the KVM_GET_ONE_REG
> > implementation kvm_arm_get_reg() returns -EINVAL and hilarity ensues.
> > 
> > The kvm/api.txt document describes all arm64 registers as starting with
> > 0x60xx... (i.e KVM_REG_ARM64).
> > 
> > Signed-off-by: Alex Bennée <alex.bennee@...aro.org>
> > Acked-by: Christoffer Dall <christoffer.dall@...aro.org>
> > ---
> >  arch/arm64/kvm/sys_regs.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
> > index 0324458..5ee99e4 100644
> > --- a/arch/arm64/kvm/sys_regs.c
> > +++ b/arch/arm64/kvm/sys_regs.c
> > @@ -962,7 +962,7 @@ static unsigned int num_demux_regs(void)
> >  
> >  static int write_demux_regids(u64 __user *uindices)
> >  {
> > -	u64 val = KVM_REG_ARM | KVM_REG_SIZE_U32 | KVM_REG_ARM_DEMUX;
> > +	u64 val = KVM_REG_ARM64 | KVM_REG_SIZE_U32 | KVM_REG_ARM_DEMUX;
> >  	unsigned int i;
> >  
> >  	val |= KVM_REG_ARM_DEMUX_ID_CCSIDR;
> > 
> 
> -EBROWNPAPERBAG.
> 
> Acked-by: Marc Zyngier <marc.zyngier@....com>
> 
Applied to kvmarm/master,

thanks.
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