From mboxrd@z Thu Jan  1 00:00:00 1970
From: James Morse <james.morse@arm.com>
Subject: Re: [PATCH v2 06/16] arm64: entry.S: convert elX_sync
Date: Thu, 10 Aug 2017 17:57:48 +0100
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To: Catalin Marinas <catalin.marinas@arm.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>, Will Deacon <will.deacon@arm.com>, kvmarm@lists.cs.columbia.edu, Wang Xiongfeng <wangxiongfeng2@huawei.com>, linux-arm-kernel@lists.infradead.org
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Hi Catalin,

On 09/08/17 18:25, Catalin Marinas wrote:
> On Fri, Jul 28, 2017 at 03:10:09PM +0100, James Morse wrote:
>> @@ -520,9 +514,16 @@ el1_preempt:
>>  el0_sync:
>>  	kernel_entry 0
>>  	mrs	x25, esr_el1			// read the syndrome register
>> +	mrs	x26, far_el1
> 
> Just checking, since we are going to access far_el1 even when we get a
> syscall, have you noticed any overhead?

Good point, I haven't checked because I've been doing all this with the software
model.

I will set this running on Seattle overnight, results in v3's cover letter.


Thanks!

James