From: Joerg Roedel <joro@8bytes.org>
To: David Woodhouse <dwmw2@infradead.org>
Cc: "linux-mm@kvack.org" <linux-mm@kvack.org>,
iommu@lists.linux-foundation.org,
Sudeep Dutt <sudeep.dutt@intel.com>
Subject: Re: [RFC PATCH] iommu/vt-d: Add IOTLB flush support for kernel addresses
Date: Tue, 20 Oct 2015 18:03:28 +0200 [thread overview]
Message-ID: <20151020160328.GV27420@8bytes.org> (raw)
In-Reply-To: <1445356379.4486.56.camel@infradead.org>
Hi David,
On Tue, Oct 20, 2015 at 04:52:59PM +0100, David Woodhouse wrote:
> void flush_tlb_kernel_range(unsigned long start, unsigned long end)
> {
> + intel_iommu_flush_kernel_pasid(start, end);
A more generic naming would be good, and probably expose it through a
function in the IOMMU-API.
> +void intel_iommu_flush_kernel_pasid(unsigned long start, unsigned long end)
> +{
> + struct dmar_drhd_unit *drhd;
> + struct intel_iommu *iommu;
> + unsigned long pages;
And I think, as a performance optimiztion, we should bail out early here
if the pasid has no users.
Joerg
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next prev parent reply other threads:[~2015-10-20 16:03 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-20 15:52 [RFC PATCH] iommu/vt-d: Add IOTLB flush support for kernel addresses David Woodhouse
2015-10-20 16:03 ` Joerg Roedel [this message]
2015-10-20 16:17 ` David Woodhouse
2015-10-23 10:20 ` Joerg Roedel
2015-10-23 10:33 ` David Woodhouse
2015-10-23 11:03 ` Joerg Roedel
2015-10-23 11:37 ` David Woodhouse
2015-10-23 12:42 ` Joerg Roedel
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