From: "Edgar E. Iglesias" <edgar.iglesias@gmail.com>
To: xen-devel@lists.xen.org
Cc: edgar.iglesias@xilinx.com, julien.grall@arm.com, sstabellini@kernel.org
Subject: [PATCH v4 7/7] xen/arm: Map mmio-sram nodes as un-cached memory
Date: Fri, 23 Sep 2016 20:53:22 +0200 [thread overview]
Message-ID: <1474656802-24081-8-git-send-email-edgar.iglesias@gmail.com> (raw)
In-Reply-To: <1474656802-24081-1-git-send-email-edgar.iglesias@gmail.com>
From: "Edgar E. Iglesias" <edgar.iglesias@xilinx.com>
Map mmio-sram nodes as un-cached memory. If the node
has set the no-memory-wc property, we map it as device.
The DTS bindings for mmio-sram nodes can be found in the
Linux tree under Documentation/devicetree/bindings/sram/sram.txt.
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
---
xen/arch/arm/domain_build.c | 30 ++++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
index 0c30121..f1c5526 100644
--- a/xen/arch/arm/domain_build.c
+++ b/xen/arch/arm/domain_build.c
@@ -48,6 +48,20 @@ struct map_range_data
p2m_type_t p2mt;
};
+static const struct dt_device_match dev_map_attrs[] __initconst =
+{
+ {
+ __DT_MATCH_COMPATIBLE("mmio-sram"),
+ __DT_MATCH_PROP("no-memory-wc"),
+ .data = (void *) (uintptr_t) p2m_mmio_direct_dev,
+ },
+ {
+ __DT_MATCH_COMPATIBLE("mmio-sram"),
+ .data = (void *) (uintptr_t) p2m_mmio_direct_nc,
+ },
+ { /* sentinel */ },
+};
+
//#define DEBUG_11_ALLOCATION
#ifdef DEBUG_11_ALLOCATION
# define D11PRINT(fmt, args...) printk(XENLOG_DEBUG fmt, ##args)
@@ -1145,6 +1159,21 @@ static int handle_device(struct domain *d, struct dt_device_node *dev,
return 0;
}
+static p2m_type_t lookup_map_attr(struct dt_device_node *node,
+ p2m_type_t parent_p2mt)
+{
+ const struct dt_device_match *r;
+
+ /* Search and if nothing matches, use the parent's attributes. */
+ r = dt_match_node(dev_map_attrs, node);
+
+ /*
+ * If this node does not dictate specific mapping attributes,
+ * it inherits its parent's attributes.
+ */
+ return r ? (uintptr_t) r->data : parent_p2mt;
+}
+
static int handle_node(struct domain *d, struct kernel_info *kinfo,
struct dt_device_node *node,
p2m_type_t p2mt)
@@ -1234,6 +1263,7 @@ static int handle_node(struct domain *d, struct kernel_info *kinfo,
"WARNING: Path %s is reserved, skip the node as we may re-use the path.\n",
path);
+ p2mt = lookup_map_attr(node, p2mt);
res = handle_device(d, node, p2mt);
if ( res)
return res;
--
2.7.4
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next prev parent reply other threads:[~2016-09-23 18:53 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-23 18:53 [PATCH v4 0/7] xen/arm: Add support for mapping mmio-sram nodes into dom0 Edgar E. Iglesias
2016-09-23 18:53 ` [PATCH v4 1/7] xen/arm: p2m: Rename p2m_mmio_direct_nc -> p2m_mmio_direct_dev Edgar E. Iglesias
2016-09-27 23:25 ` Julien Grall
2016-09-23 18:53 ` [PATCH v4 2/7] xen/arm: p2m: Add support for normal non-cacheable memory Edgar E. Iglesias
2016-09-27 23:37 ` Julien Grall
2016-09-23 18:53 ` [PATCH v4 3/7] xen/arm: Rename and generalize un/map_regions_rw_cache Edgar E. Iglesias
2016-09-27 23:45 ` Julien Grall
2016-09-23 18:53 ` [PATCH v4 4/7] xen/device-tree: Add __DT_MATCH macros without braces Edgar E. Iglesias
2016-09-23 18:53 ` [PATCH v4 5/7] xen/device-tree: Make dt_match_node match props Edgar E. Iglesias
2016-09-23 18:53 ` [PATCH v4 6/7] xen/arm: domain_build: Plumb for different mapping attributes Edgar E. Iglesias
2016-09-23 18:53 ` Edgar E. Iglesias [this message]
2016-09-27 23:52 ` [PATCH v4 7/7] xen/arm: Map mmio-sram nodes as un-cached memory Julien Grall
2016-09-28 1:31 ` [PATCH v4 0/7] xen/arm: Add support for mapping mmio-sram nodes into dom0 Stefano Stabellini
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