From: Edgar E. Iglesias Date: Thu, 26 Jan 2017 13:16:02 +0000 (+0100) Subject: xen/arm: acpi: Relax hw domain mapping attributes to p2m_mmio_direct_c X-Git-Tag: archive/raspbian/4.11.1-1+rpi1~1^2~66^2~2873 X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=5a44ff111d2e1ba9f375936294117ff4e263c4ac;p=xen.git 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 Acked-by: Julien Grall Acked-by: Stefano Stabellini --- diff --git a/xen/arch/arm/p2m.c b/xen/arch/arm/p2m.c index 980d9918ec..d762b1102d 100644 --- a/xen/arch/arm/p2m.c +++ b/xen/arch/arm/p2m.c @@ -1104,7 +1104,7 @@ 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 e633047733..6eee0c8a16 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. */ /* ` } */ /*