linux-kernel - Re: [PATCH 09/10] iommu/amd: Clear the iommu pre enabled setting

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Date:	Sat, 10 Oct 2015 20:30:36 +0800
From:	Baoquan He <bhe@...hat.com>
To:	Joerg Roedel <joro@...tes.org>
Cc:	iommu@...ts.linux-foundation.org, kexec@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 09/10] iommu/amd: Clear the iommu pre enabled setting

On 09/29/15 at 06:09pm, Joerg Roedel wrote:
> On Thu, Sep 24, 2015 at 02:37:35PM +0800, Baoquan He wrote:
> > @@ -2469,6 +2469,8 @@ static dma_addr_t __map_single(struct device *dev,
> >  	unsigned long align_mask = 0;
> >  	int i;
> >  
> > +	if (translation_pre_enabled())
> > +		clear_translation_pre_enabled();
> 
> There is probably a better place to do this somewhere in the
> initialization state machine of the AMD IOMMU driver.

Yeah, I put it in state_next().

static int __init state_next(void)
{
        int ret = 0;

        switch (init_state) {
        case IOMMU_START_STATE:
	......

	case IOMMU_DMA_OPS:
                if (translation_pre_enabled())
                        clear_translation_pre_enabled();
                init_state = IOMMU_INITIALIZED;
                break;
	......
}

> 
> 
> 	Joerg
> 
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