From: Stefano Stabellini <sstabellini@kernel.org>
To: xen-devel@lists.xenproject.org
Cc: Stefano Stabellini <stefanos@xilinx.com>,
julien.grall@arm.com, sstabellini@kernel.org
Subject: [Xen-devel] [PATCH v4 6/7] xen/arm: don't iomem_permit_access for reserved-memory regions
Date: Tue, 6 Aug 2019 14:49:24 -0700 [thread overview]
Message-ID: <20190806214925.7534-6-sstabellini@kernel.org> (raw)
In-Reply-To: <alpine.DEB.2.21.1908061428420.2451@sstabellini-ThinkPad-T480s>
Don't allow reserved-memory regions to be remapped into any guests,
until reserved-memory regions are properly supported in Xen. For now,
do not call iomem_permit_access for them.
Signed-off-by: Stefano Stabellini <stefanos@xilinx.com>
---
Changes in v4:
- compare the parent name with reserved-memory
- use dt_node_cmp
Changes in v3:
- new patch
---
xen/arch/arm/domain_build.c | 24 ++++++++++++++++--------
1 file changed, 16 insertions(+), 8 deletions(-)
diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
index 4c8404155a..267e0549e2 100644
--- a/xen/arch/arm/domain_build.c
+++ b/xen/arch/arm/domain_build.c
@@ -1153,17 +1153,25 @@ static int __init map_range_to_domain(const struct dt_device_node *dev,
struct map_range_data *mr_data = data;
struct domain *d = mr_data->d;
bool need_mapping = !dt_device_for_passthrough(dev);
+ const struct dt_device_node *parent = dt_get_parent(dev);
int res;
- res = iomem_permit_access(d, paddr_to_pfn(addr),
- paddr_to_pfn(PAGE_ALIGN(addr + len - 1)));
- if ( res )
+ /*
+ * Don't give iomem permissions for reserved-memory ranges until
+ * reserved-memory support is complete.
+ */
+ if ( dt_node_cmp(dt_node_name(parent), "reserved-memory") == 0 )
{
- printk(XENLOG_ERR "Unable to permit to dom%d access to"
- " 0x%"PRIx64" - 0x%"PRIx64"\n",
- d->domain_id,
- addr & PAGE_MASK, PAGE_ALIGN(addr + len) - 1);
- return res;
+ res = iomem_permit_access(d, paddr_to_pfn(addr),
+ paddr_to_pfn(PAGE_ALIGN(addr + len - 1)));
+ if ( res )
+ {
+ printk(XENLOG_ERR "Unable to permit to dom%d access to"
+ " 0x%"PRIx64" - 0x%"PRIx64"\n",
+ d->domain_id,
+ addr & PAGE_MASK, PAGE_ALIGN(addr + len) - 1);
+ return res;
+ }
}
if ( need_mapping )
--
2.17.1
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next prev parent reply other threads:[~2019-08-06 21:49 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-06 21:49 [Xen-devel] [PATCH v4 0/7] reserved-memory in dom0 Stefano Stabellini
2019-08-06 21:49 ` [Xen-devel] [PATCH v4 1/7] xen/arm: extend device_tree_for_each_node Stefano Stabellini
2019-08-07 16:08 ` Julien Grall
2019-08-07 16:16 ` Julien Grall
2019-08-09 22:01 ` Stefano Stabellini
2019-08-06 21:49 ` [Xen-devel] [PATCH v4 2/7] xen/arm: make process_memory_node a device_tree_node_func Stefano Stabellini
2019-08-07 16:19 ` Julien Grall
2019-08-09 21:08 ` Stefano Stabellini
2019-08-06 21:49 ` [Xen-devel] [PATCH v4 3/7] xen/arm: keep track of reserved-memory regions Stefano Stabellini
2019-08-07 16:33 ` Julien Grall
2019-08-09 22:19 ` Stefano Stabellini
2019-08-09 23:57 ` Julien Grall
2019-08-12 18:10 ` Stefano Stabellini
2019-08-07 16:46 ` Julien Grall
2019-08-09 20:37 ` Stefano Stabellini
2019-08-06 21:49 ` [Xen-devel] [PATCH v4 4/7] xen/arm: early_print_info print reserved_mem Stefano Stabellini
2019-08-07 16:36 ` Julien Grall
2019-08-09 20:29 ` Stefano Stabellini
2019-08-06 21:49 ` [Xen-devel] [PATCH v4 5/7] xen/arm: handle reserved-memory in consider_modules and dt_unreserved_regions Stefano Stabellini
2019-08-06 21:49 ` Stefano Stabellini [this message]
2019-08-08 19:19 ` [Xen-devel] [PATCH v4 6/7] xen/arm: don't iomem_permit_access for reserved-memory regions Volodymyr Babchuk
2019-08-09 22:56 ` Stefano Stabellini
2019-08-12 10:43 ` Julien Grall
2019-08-12 17:45 ` Stefano Stabellini
2019-08-06 21:49 ` [Xen-devel] [PATCH v4 7/7] xen/arm: add reserved-memory regions to the dom0 memory node Stefano Stabellini
2019-08-07 18:29 ` Julien Grall
2019-08-08 19:11 ` [Xen-devel] [PATCH v4 0/7] reserved-memory in dom0 Volodymyr Babchuk
2019-08-08 19:16 ` Stefano Stabellini
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