From mboxrd@z Thu Jan  1 00:00:00 1970
From: Julien Grall <julien.grall@linaro.org>
Subject: Re: [PATCH v2 5/9] xen: arm: Handle CP15 register traps
	from userspace
Date: Tue, 17 Feb 2015 15:07:48 +0000
Message-ID: <54E35944.9030705@linaro.org>
References: <1423542956.5851.9.camel@citrix.com>
	<1423543523-8010-5-git-send-email-ian.campbell@citrix.com>
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To: Ian Campbell <ian.campbell@citrix.com>, xen-devel@lists.xen.org
Cc: tim@xen.org, stefano.stabellini@eu.citrix.com
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Hi Ian,

On 10/02/15 04:45, Ian Campbell wrote:
>      default:
> @@ -2047,8 +2070,7 @@ asmlinkage void do_trap_hypervisor(struct cpu_user_regs *regs)
>          advance_pc(regs, hsr);
>          break;
>      case HSR_EC_CP15_32:
> -        if ( !is_32bit_domain(current->domain) )
> -            goto bad_trap;
> +        BUG_ON(!psr_mode_is_32bit(regs->cpsr));

It's a bit strange that on the previous patch (#5) you fixed CP15_64 but
not CP15_32. If I'm not mistaken you need both in-order to make the
things correctly work.

So, I would invert the 2 patches.

Regards,

-- 
Julien Grall