[Xen-changelog] [xen master] x86: don't allow Dom0 access to the HT address range

[patchbot@xxxxxxx]

commit d838ac2539cf1987bea6e15662fd6a80a58fe26d
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Tue Aug 27 11:12:12 2013 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Tue Aug 27 11:12:12 2013 +0200

    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@xxxxxxxx>
---
 xen/arch/x86/domain_build.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/xen/arch/x86/domain_build.c b/xen/arch/x86/domain_build.c
index 8365f32..232adf8 100644
--- 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++ )
--
generated by git-patchbot for /home/xen/git/xen.git#master

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