[Xen-changelog] [xen stable-4.8] xen/arm: acpi: Relax hw domain mapping attributes to p2m_mmio_direct_c

[patchbot@xxxxxxx]

commit 42290f02715e62bfe9edf32daac1b224758b7ae4
Author:     Edgar E. Iglesias <edgar.iglesias@xxxxxxxxxx>
AuthorDate: Thu Jan 26 14:16:02 2017 +0100
Commit:     Stefano Stabellini <sstabellini@xxxxxxxxxx>
CommitDate: Thu Mar 16 13:58:14 2017 -0700

    xen/arm: acpi: Relax hw domain mapping attributes to p2m_mmio_direct_c
    
    Since the hardware domain is a trusted domain, we extend the
    trust to include making final decisions on what attributes to
    use when mapping memory regions.
    
    For ACPI configured hardware domains, this patch relaxes the hardware
    domains mapping attributes to p2m_mmio_direct_c. This will allow the
    hardware domain to control the attributes via its S1 mappings.
    
    Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xxxxxxxxxx>
    Acked-by: Julien Grall <julien.grall@xxxxxxx>
    Acked-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
---
 xen/arch/arm/p2m.c          | 2 +-
 xen/include/public/memory.h | 6 +++---
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/xen/arch/arm/p2m.c b/xen/arch/arm/p2m.c
index fab140d..da6dee5 100644
--- a/xen/arch/arm/p2m.c
+++ b/xen/arch/arm/p2m.c
@@ -1179,7 +1179,7 @@ int map_dev_mmio_region(struct domain *d,
     if ( !(nr && iomem_access_permitted(d, mfn_x(mfn), mfn_x(mfn) + nr - 1)) )
         return 0;
 
-    res = map_mmio_regions(d, gfn, nr, mfn);
+    res = p2m_insert_mapping(d, gfn, nr, mfn, p2m_mmio_direct_c);
     if ( res < 0 )
     {
         printk(XENLOG_G_ERR "Unable to map MFNs [%#"PRI_mfn" - %#"PRI_mfn" in 
Dom%d\n",
diff --git a/xen/include/public/memory.h b/xen/include/public/memory.h
index 5bf840f..315a4e8 100644
--- a/xen/include/public/memory.h
+++ b/xen/include/public/memory.h
@@ -222,9 +222,9 @@ DEFINE_XEN_GUEST_HANDLE(xen_machphys_mapping_t);
                                     * XENMEM_add_to_physmap_batch only. */
 #define XENMAPSPACE_dev_mmio     5 /* device mmio region
                                       ARM only; the region is mapped in
-                                      Stage-2 using the memory attribute
-                                      "Device-nGnRE" (previously named
-                                      "Device" on ARMv7) */
+                                      Stage-2 using the Normal Memory
+                                      Inner/Outer Write-Back Cacheable
+                                      memory attribute. */
 /* ` } */
 
 /*
--
generated by git-patchbot for /home/xen/git/xen.git#stable-4.8

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