File 521c6d6c-x86-don-t-allow-Dom0-access-to-the-HT-address-range.patch of Package xen.openSUSE_13.1_Update

# Commit d838ac2539cf1987bea6e15662fd6a80a58fe26d
# Date 2013-08-27 11:12:12 +0200
# Author Jan Beulich <jbeulich@suse.com>
# Committer Jan Beulich <jbeulich@suse.com>
x86: don't allow Dom0 access to the HT address range

In particular, MMIO assignments should not be done using this area.

Signed-off-by: Jan Beulich <jbeulich@suse.com>

--- a/xen/arch/x86/domain_build.c
+++ b/xen/arch/x86/domain_build.c
@@ -1126,6 +1126,10 @@ int __init construct_dom0(
     rc |= iomem_deny_access(dom0, paddr_to_pfn(MSI_ADDR_BASE_LO),
                             paddr_to_pfn(MSI_ADDR_BASE_LO +
                                          MSI_ADDR_DEST_ID_MASK));
+    /* HyperTransport range. */
+    if ( boot_cpu_data.x86_vendor == X86_VENDOR_AMD )
+        rc |= iomem_deny_access(dom0, paddr_to_pfn(0xfdULL << 32),
+                                paddr_to_pfn((1ULL << 40) - 1));
 
     /* Remove access to E820_UNUSABLE I/O regions above 1MB. */
     for ( i = 0; i < e820.nr_map; i++ )