2013-09-09 15:27:39 +00:00
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# Commit 850188e1278cecd1dfb9b936024bee2d8dfdcc18
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# Date 2013-08-27 11:11:38 +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 MSI 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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Acked-by Xiantao Zhang <xiantao.zhang@intel.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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@@ -1122,6 +1122,10 @@ int __init construct_dom0(
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if ( !rangeset_contains_singleton(mmio_ro_ranges, mfn) )
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rc |= iomem_deny_access(dom0, mfn, mfn);
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}
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+ /* MSI range. */
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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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/* 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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