31 lines
1.1 KiB
Diff
31 lines
1.1 KiB
Diff
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# HG changeset patch
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# User Jan Beulich <jbeulich@suse.com>
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# Date 1329303884 -3600
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# Node ID 618cbd27bac06fe39b1c6f28ded6d4d7f444e7bd
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# Parent 0ba87b95e80bae059fe70b4b117dcc409f2471ef
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x86: don't allow Dom0 to map MSI-X table writably
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With the traditional qemu tree fixed to not use PROT_WRITE anymore in
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the mmap() call for this region, and with the upstream qemu tree not
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being capable of handling passthrough, yet, there's no need to treat
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Dom specially here anymore.
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This continues to leave unaddressed the case where PV guests map the
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MSI-X table page(s) before setting up the first MSI-X interrupt (see
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the original c/s 22182:68cc3c514a0a description for options).
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Signed-off-by: Jan Beulich <jbeulich@suse.com>
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Acked-by: Keir Fraser <keir@xen.org>
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--- a/xen/arch/x86/mm.c
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+++ b/xen/arch/x86/mm.c
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@@ -835,7 +835,7 @@ get_page_from_l1e(
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return -EINVAL;
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}
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- if ( !(l1f & _PAGE_RW) || IS_PRIV(pg_owner) ||
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+ if ( !(l1f & _PAGE_RW) ||
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!rangeset_contains_singleton(mmio_ro_ranges, mfn) )
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return 0;
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dprintk(XENLOG_G_WARNING,
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