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xen
521c6d6c-x86-don-t-allow-Dom0-access-to-the-HT-...
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File 521c6d6c-x86-don-t-allow-Dom0-access-to-the-HT-address-range.patch of Package xen
# 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++ )
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