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| author | Jan Beulich <jbeulich@suse.com> | 2013-08-27 11:12:12 +0200 |
|---|---|---|
| committer | Jan Beulich <jbeulich@suse.com> | 2013-08-27 11:12:12 +0200 |
| commit | d838ac2539cf1987bea6e15662fd6a80a58fe26d (patch) | |
| tree | 9c45e5dee6feb902e58e401dcfda3bb3af10dd78 /xen/arch/x86/domain_build.c | |
| parent | 850188e1278cecd1dfb9b936024bee2d8dfdcc18 (diff) | |
| download | xen-d838ac2539cf1987bea6e15662fd6a80a58fe26d.tar.gz xen-d838ac2539cf1987bea6e15662fd6a80a58fe26d.tar.bz2 xen-d838ac2539cf1987bea6e15662fd6a80a58fe26d.zip | |
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>
Diffstat (limited to 'xen/arch/x86/domain_build.c')
| -rw-r--r-- | 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 8365f327f4..232adf8db2 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++ ) |