From: Diana Craciun <diana.craciun@freescale.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH 0/4] Add LS1021A-QDS/TWR Non-secure and HYP support.
Date: Fri, 4 Jul 2014 14:39:34 +0300 [thread overview]
Message-ID: <53B69276.5000909@freescale.com> (raw)
In-Reply-To: <128388bd235241899c7cadc2a2c510db@BY2PR03MB505.namprd03.prod.outlook.com>
On 07/04/2014 04:31 AM, Xiubo Li-B47053 wrote:
>>> This patch series depends on the following patch:
>>>
>>> [U-Boot,v4,03/10] ARM: non-sec: reset CNTVOFF to zero
>>>
>>> Before switching to non-secure, make sure that CNTVOFF is set
>>> to zero on all CPUs. Otherwise, kernel running in non-secure
>>> without HYP enabled (hence using virtual timers) may observe
>> But we have HYP enabled. In this case why are the series dependent on
>> this patch?
>>
> Well, if the HYP is enabled, the host OS will use the Physical timer,
> and these CNTVOFFs could be cleared in kernel too.
>
> When and where to clear them is better ? In uboot or in kernel when needed?
If HYP mode is available CNTVOFF is cleared in Linux. What I am trying
to say is that it will work also without the patch you mentioned.
Diana
next prev parent reply other threads:[~2014-07-04 11:39 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-03 9:51 [U-Boot] [PATCH 0/4] Add LS1021A-QDS/TWR Non-secure and HYP support Xiubo Li
2014-07-03 9:51 ` [U-Boot] [PATCH 1/4] ARM: fix the ARCH Timer frequency setting Xiubo Li
2014-07-03 11:23 ` Diana Craciun
2014-07-04 1:43 ` Li.Xiubo at freescale.com
2014-07-04 9:45 ` Diana Craciun
2014-07-03 9:51 ` [U-Boot] [PATCH 2/4] ARM: add the pen address byte reverting support Xiubo Li
2014-07-03 9:51 ` [U-Boot] [PATCH 3/4] ARM: LS1021A: enable ARMv7 virt support for LS1021A A7 Xiubo Li
2014-07-03 11:43 ` Diana Craciun
2014-07-04 1:48 ` Li.Xiubo at freescale.com
2014-07-04 11:35 ` Diana Craciun
2014-07-07 1:56 ` Li.Xiubo at freescale.com
2014-07-03 9:51 ` [U-Boot] [PATCH 4/4] ARM: LS1021A: to allow non-secure R/W access for all devices' mapped region Xiubo Li
2014-07-03 11:58 ` Diana Craciun
2014-07-04 1:49 ` Li.Xiubo at freescale.com
2014-07-03 11:14 ` [U-Boot] [PATCH 0/4] Add LS1021A-QDS/TWR Non-secure and HYP support Diana Craciun
2014-07-04 1:31 ` Li.Xiubo at freescale.com
2014-07-04 11:39 ` Diana Craciun [this message]
2014-07-07 3:46 ` Li.Xiubo at freescale.com
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