From: Alex Sierra <alex.sierra@amd.com>
To: akpm@linux-foundation.org, Felix.Kuehling@amd.com,
linux-mm@kvack.org, rcampbell@nvidia.com
Cc: amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
hch@lst.de, jgg@nvidia.com, jglisse@redhat.com
Subject: [RFC PATCH v2 3/8] kernel: resource: lookup_resource as exported symbol
Date: Mon, 7 Jun 2021 15:42:21 -0500 [thread overview]
Message-ID: <20210607204226.7743-4-alex.sierra@amd.com> (raw)
In-Reply-To: <20210607204226.7743-1-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 | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/resource.c b/kernel/resource.c
index 627e61b0c124..269489bb7097 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -783,7 +783,7 @@ 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,
* otherwise return the conflicting resource (compare to __request_resource())
--
2.17.1
next prev parent reply other threads:[~2021-06-07 20:58 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-07 20:42 [RFC PATCH v2 0/8] Support DEVICE_GENERIC memory in migrate_vma_* Alex Sierra
2021-06-07 20:42 ` [RFC PATCH v2 1/8] ext4/xfs: add page refcount helper Alex Sierra
2021-06-08 0:29 ` Liam Howlett
2021-06-08 14:33 ` Matthew Wilcox
2021-06-09 19:23 ` Matthew Wilcox
2021-06-14 15:26 ` Felix Kuehling
2021-06-07 20:42 ` [RFC PATCH v2 2/8] mm: remove extra ZONE_DEVICE struct page refcount Alex Sierra
2021-06-07 20:42 ` Alex Sierra [this message]
2021-06-07 20:42 ` [RFC PATCH v2 4/8] drm/amdkfd: add SPM support for SVM Alex Sierra
2021-06-07 20:42 ` [RFC PATCH v2 5/8] drm/amdkfd: generic type as sys mem on migration to ram Alex Sierra
2021-06-07 20:42 ` [RFC PATCH v2 6/8] include/linux/mm.h: helpers to check zone device generic type Alex Sierra
2021-06-07 20:42 ` [RFC PATCH v2 7/8] mm: add generic type support to migrate_vma helpers Alex Sierra
2021-06-07 20:42 ` [RFC PATCH v2 8/8] mm: call pgmap->ops->page_free for DEVICE_GENERIC pages Alex Sierra
2021-06-08 14:26 ` [RFC PATCH v2 0/8] Support DEVICE_GENERIC memory in migrate_vma_* Matthew Wilcox
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