2013-09-09 15:27:39 +00:00
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# Commit d838ac2539cf1987bea6e15662fd6a80a58fe26d
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# Date 2013-08-27 11:12:12 +0200
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# Author Jan Beulich <jbeulich@suse.com>
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# Committer Jan Beulich <jbeulich@suse.com>
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x86: don't allow Dom0 access to the HT address range
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In particular, MMIO assignments should not be done using this area.
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Signed-off-by: Jan Beulich <jbeulich@suse.com>
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2013-10-02 22:41:46 +00:00
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--- a/xen/arch/x86/domain_build.c
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+++ b/xen/arch/x86/domain_build.c
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2013-09-09 15:27:39 +00:00
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@@ -1126,6 +1126,10 @@ int __init construct_dom0(
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rc |= iomem_deny_access(dom0, paddr_to_pfn(MSI_ADDR_BASE_LO),
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paddr_to_pfn(MSI_ADDR_BASE_LO +
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MSI_ADDR_DEST_ID_MASK));
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+ /* HyperTransport range. */
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+ if ( boot_cpu_data.x86_vendor == X86_VENDOR_AMD )
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+ rc |= iomem_deny_access(dom0, paddr_to_pfn(0xfdULL << 32),
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+ paddr_to_pfn((1ULL << 40) - 1));
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/* Remove access to E820_UNUSABLE I/O regions above 1MB. */
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for ( i = 0; i < e820.nr_map; i++ )
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