linux-kernel - linux-next: manual merge of the iommu tree with Linus' tree

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Date:   Fri, 27 Jan 2023 14:13:30 +1100
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Joerg Roedel <joro@...tes.org>
Cc:     Alex Williamson <alex.williamson@...hat.com>,
        Jason Gunthorpe <jgg@...dia.com>,
        Jason Gunthorpe <jgg@...pe.ca>, Joerg Roedel <jroedel@...e.de>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Niklas Schnelle <schnelle@...ux.ibm.com>
Subject: linux-next: manual merge of the iommu tree with Linus' tree

Hi all,

Today's linux-next merge of the iommu tree got a conflict in:

  drivers/vfio/vfio_iommu_type1.c

between commit:

  895c0747f726 ("vfio/type1: Respect IOMMU reserved regions in vfio_test_domain_fgsp()")

from Linus' tree and commit:

  1369459b2e21 ("iommu: Add a gfp parameter to iommu_map()")

from the iommu tree.

I fixed it up (see below) and can carry the fix as necessary. This
is now fixed as far as linux-next is concerned, but any non trivial
conflicts should be mentioned to your upstream maintainer when your tree
is submitted for merging.  You may also want to consider cooperating
with the maintainer of the conflicting tree to minimise any particularly
complex conflicts.

-- 
Cheers,
Stephen Rothwell

diff --cc drivers/vfio/vfio_iommu_type1.c
index 2209372f236d,e14f86a8ef52..000000000000
--- a/drivers/vfio/vfio_iommu_type1.c
+++ b/drivers/vfio/vfio_iommu_type1.c
@@@ -1867,22 -1866,15 +1868,22 @@@ static void vfio_test_domain_fgsp(struc
  	if (!pages)
  		return;
  
 -	ret = iommu_map(domain->domain, 0, page_to_phys(pages), PAGE_SIZE * 2,
 -			IOMMU_READ | IOMMU_WRITE | IOMMU_CACHE, GFP_KERNEL);
 -	if (!ret) {
 -		size_t unmapped = iommu_unmap(domain->domain, 0, PAGE_SIZE);
 +	list_for_each_entry(region, regions, list) {
 +		start = ALIGN(region->start, PAGE_SIZE * 2);
 +		if (start >= region->end || (region->end - start < PAGE_SIZE * 2))
 +			continue;
  
 -		if (unmapped == PAGE_SIZE)
 -			iommu_unmap(domain->domain, PAGE_SIZE, PAGE_SIZE);
 -		else
 -			domain->fgsp = true;
 +		ret = iommu_map(domain->domain, start, page_to_phys(pages), PAGE_SIZE * 2,
- 				IOMMU_READ | IOMMU_WRITE | IOMMU_CACHE);
++				IOMMU_READ | IOMMU_WRITE | IOMMU_CACHE, GFP_KERNEL);
 +		if (!ret) {
 +			size_t unmapped = iommu_unmap(domain->domain, start, PAGE_SIZE);
 +
 +			if (unmapped == PAGE_SIZE)
 +				iommu_unmap(domain->domain, start + PAGE_SIZE, PAGE_SIZE);
 +			else
 +				domain->fgsp = true;
 +		}
 +		break;
  	}
  
  	__free_pages(pages, order);

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