linux-kernel - Re: [PATCH v3 05/16] iommu/vt-d: support flushing more TLB types

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Date:   Mon, 20 Nov 2017 14:20:31 +0000
From:   "Lukoshkov, Maksim" <maksim.lukoshkov@...el.com>
To:     Jacob Pan <jacob.jun.pan@...ux.intel.com>,
        "iommu@...ts.linux-foundation.org" <iommu@...ts.linux-foundation.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Joerg Roedel <joro@...tes.org>,
        David Woodhouse <dwmw2@...radead.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Wysocki, Rafael J" <rafael.j.wysocki@...el.com>,
        Alex Williamson <alex.williamson@...hat.com>
CC:     "Lan, Tianyu" <tianyu.lan@...el.com>,
        Yi L <yi.l.liu@...ux.intel.com>,
        "Liu@...l.linuxfoundation.org" <Liu@...l.linuxfoundation.org>,
        Jean Delvare <khali@...ux-fr.org>
Subject: Re: [PATCH v3 05/16] iommu/vt-d: support flushing more TLB types

On 11/17/2017 18:55, Jacob Pan wrote:
> +void qi_flush_dev_iotlb(struct intel_iommu *iommu, u16 sid, u16 pfsid,
> +			u16 qdep, u64 addr, unsigned mask)
> +{
> +	struct qi_desc desc;
> +
> +	pr_debug_ratelimited("%s: sid %d, pfsid %d, qdep %d, addr %llx, mask %d\n",
> +		__func__, sid, pfsid, qdep, addr, mask);
>   	if (mask) {
>   		BUG_ON(addr & ((1 << (VTD_PAGE_SHIFT + mask)) - 1));
>   		addr |= (1ULL << (VTD_PAGE_SHIFT + mask - 1)) - 1;
> @@ -1352,7 +1366,41 @@ void qi_flush_dev_iotlb(struct intel_iommu *iommu, u16 sid, u16 qdep,
>   		qdep = 0;
>   
>   	desc.low = QI_DEV_IOTLB_SID(sid) | QI_DEV_IOTLB_QDEP(qdep) |
> -		   QI_DIOTLB_TYPE;
> +		   QI_DIOTLB_TYPE | QI_DEV_IOTLB_SID(pfsid);

QI_DEV_IOTLB_SID(pfsid) -> QI_DEV_EIOTLB_PFSID(pfsid)?

> +
> +	qi_submit_sync(&desc, iommu);
> +}
> +

Regards,
Maksim Lukoshkov