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

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Message-ID: <53B2DA42.40604@arm.com>
Date:	Tue, 01 Jul 2014 16:56:50 +0100
From:	Marc Zyngier <marc.zyngier@....com>
To:	Alex Bennée <alex.bennee@...aro.org>
CC:	"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>,
	Christoffer Dall <christoffer.dall@...aro.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 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>

Thanks,

	M.
-- 
Jazz is not dead. It just smells funny...
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