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From: Alex Sierra <alex.sierra@amd.com>
To: akpm@linux-foundation.org, Felix.Kuehling@amd.com,
	linux-mm@kvack.org, rcampbell@nvidia.com,
	linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org
Cc: amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
	hch@lst.de, jgg@nvidia.com, jglisse@redhat.com
Subject: [PATCH v6 03/13] kernel: resource: lookup_resource as exported symbol
Date: Fri, 13 Aug 2021 01:31:40 -0500	[thread overview]
Message-ID: <20210813063150.2938-4-alex.sierra@amd.com> (raw)
In-Reply-To: <20210813063150.2938-1-alex.sierra@amd.com>

The AMD architecture for the Frontier supercomputer will
have device memory which can be coherently accessed by
the CPU. The system BIOS advertises this memory as SPM
(special purpose memory) in the UEFI system address map.

The AMDGPU driver needs to be able to lookup this resource
in order to claim it as MEMORY_DEVICE_GENERIC using
devm_memremap_pages.

Signed-off-by: Alex Sierra <alex.sierra@amd.com>
---
 kernel/resource.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/resource.c b/kernel/resource.c
index ca9f5198a01f..227fc9fab573 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -772,6 +772,7 @@ struct resource *lookup_resource(struct resource *root, resource_size_t start)
 
 	return res;
 }
+EXPORT_SYMBOL_GPL(lookup_resource);
 
 /*
  * Insert a resource into the resource tree. If successful, return NULL,
-- 
2.32.0


  parent reply	other threads:[~2021-08-13  6:32 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-13  6:31 [PATCH v6 00/13] Support DEVICE_GENERIC memory in migrate_vma_* Alex Sierra
2021-08-13  6:31 ` [PATCH v6 01/13] ext4/xfs: add page refcount helper Alex Sierra
2021-08-15  9:01   ` Christoph Hellwig
2021-08-13  6:31 ` [PATCH v6 02/13] mm: remove extra ZONE_DEVICE struct page refcount Alex Sierra
2021-08-15 15:37   ` Christoph Hellwig
2021-08-15 20:40     ` John Hubbard
2021-08-16 18:56       ` Felix Kuehling
2021-08-20  6:33       ` Jerome Glisse
2021-08-18  0:01   ` Ralph Campbell
2021-08-18  0:35     ` Felix Kuehling
2021-08-18 19:28       ` Ralph Campbell
2021-08-19 18:00         ` Sierra Guiza, Alejandro (Alex)
2021-08-19 19:59           ` Felix Kuehling
2021-08-20  4:40             ` Christoph Hellwig
2021-08-20  7:17           ` Jerome Glisse
2021-08-20  4:56         ` Christoph Hellwig
2021-08-13  6:31 ` Alex Sierra [this message]
2021-08-13  6:31 ` [PATCH v6 04/13] drm/amdkfd: add SPM support for SVM Alex Sierra
2021-08-15  9:10   ` Christoph Hellwig
2021-08-16 18:54     ` Felix Kuehling
2021-08-17  5:47       ` Christoph Hellwig
2021-08-13  6:31 ` [PATCH v6 05/13] drm/amdkfd: generic type as sys mem on migration to ram Alex Sierra
2021-08-15 15:38   ` Christoph Hellwig
2021-08-16 19:53     ` Sierra Guiza, Alejandro (Alex)
2021-08-16 22:06       ` Zeng, Oak
2021-08-17  0:42         ` Felix Kuehling
2021-08-17  5:49       ` Christoph Hellwig
2021-08-13  6:31 ` [PATCH v6 06/13] include/linux/mm.h: helpers to check zone device generic type Alex Sierra
2021-08-15  9:16   ` Christoph Hellwig
2021-08-13  6:31 ` [PATCH v6 07/13] mm: add generic type support to migrate_vma helpers Alex Sierra
2021-08-15  9:19   ` Christoph Hellwig
2021-08-13  6:31 ` [PATCH v6 08/13] mm: call pgmap->ops->page_free for DEVICE_GENERIC pages Alex Sierra
2021-08-15 15:40   ` Christoph Hellwig
2021-08-16 19:00     ` Felix Kuehling
2021-08-17  5:50       ` Christoph Hellwig
2021-08-17 15:44         ` Felix Kuehling
2021-08-20  5:05           ` Christoph Hellwig
2021-08-20  7:24             ` Jerome Glisse
2021-08-13  6:31 ` [PATCH v6 09/13] lib: test_hmm add ioctl to get zone device type Alex Sierra
2021-08-13  6:31 ` [PATCH v6 10/13] lib: test_hmm add module param for " Alex Sierra
2021-08-13  6:31 ` [PATCH v6 11/13] lib: add support for device generic type in test_hmm Alex Sierra
2021-08-13  6:31 ` [PATCH v6 12/13] tools: update hmm-test to support device generic type Alex Sierra
2021-08-13  6:31 ` [PATCH v6 13/13] tools: update test_hmm script to support SP config Alex Sierra

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