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From: James Morse <james.morse@arm.com>
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
Subject: Re: [PATCH v2 06/16] arm64: entry.S: convert elX_sync
Date: Thu, 10 Aug 2017 17:57:48 +0100	[thread overview]
Message-ID: <598C908C.9030506@arm.com> (raw)
In-Reply-To: <20170809172527.yrkpthrrtqoxi4d7@armageddon.cambridge.arm.com>

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

  reply	other threads:[~2017-08-10 16:57 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-07-28 14:10 [PATCH v2 00/16] SError rework + v8.2 RAS and IESB cpufeature support James Morse
2017-07-28 14:10 ` [PATCH v2 01/16] arm64: explicitly mask all exceptions James Morse
2017-07-28 14:10 ` [PATCH v2 02/16] arm64: introduce an order for exceptions James Morse
2017-07-28 14:10 ` [PATCH v2 03/16] arm64: unmask all exceptions from C code on CPU startup James Morse
2017-07-28 14:10 ` [PATCH v2 04/16] arm64: entry.S: mask all exceptions during kernel_exit James Morse
2017-07-28 14:10 ` [PATCH v2 05/16] arm64: entry.S: move enable_step_tsk into kernel_exit James Morse
2017-07-28 14:10 ` [PATCH v2 06/16] arm64: entry.S: convert elX_sync James Morse
2017-08-09 17:25   ` Catalin Marinas
2017-08-10 16:57     ` James Morse [this message]
2017-08-11 17:24       ` James Morse
2017-07-28 14:10 ` [PATCH v2 07/16] arm64: entry.S: convert elX_irq James Morse
2017-07-28 14:10 ` [PATCH v2 08/16] arm64: entry.S: move SError handling into a C function for future expansion James Morse
2017-07-28 14:10 ` [PATCH v2 09/16] arm64: cpufeature: Detect CPU RAS Extentions James Morse
2017-07-28 14:10 ` [PATCH v2 10/16] arm64: kernel: Survive corrected RAS errors notified by SError James Morse
2017-09-13 20:52   ` Baicar, Tyler
2017-09-14 12:58     ` James Morse
2017-07-28 14:10 ` [PATCH v2 11/16] arm64: kernel: Handle deferred SError on kernel entry James Morse
2017-08-03 17:03   ` James Morse
2017-07-28 14:10 ` [PATCH v2 12/16] arm64: entry.S: Make eret restartable James Morse
2017-07-28 14:10 ` [PATCH v2 13/16] arm64: cpufeature: Enable Implicit ESB on entry/return-from EL1 James Morse
2017-07-28 14:10 ` [PATCH v2 14/16] KVM: arm64: Take pending SErrors on entry to the guest James Morse
2017-08-01 12:53   ` Christoffer Dall
2017-07-28 14:10 ` [PATCH v2 15/16] KVM: arm64: Save ESR_EL2 on guest SError James Morse
2017-08-01 13:25   ` Christoffer Dall
2017-07-28 14:10 ` [PATCH v2 16/16] KVM: arm64: Handle deferred SErrors consumed on guest exit James Morse
2017-08-01 13:18   ` Christoffer Dall
2017-08-03 17:03     ` James Morse
2017-08-04 13:12       ` Christoffer Dall

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