File xsa131-qemut-5.patch of Package xen.950

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File xsa131-qemut-5.patch of Package xen.950

xen/pt: mark all PCIe capability bits read-only

xen_pt_emu_reg_pcie[]'s PCI_EXP_DEVCAP needs to cover all bits as read-
only to avoid unintended write-back (just a precaution, the field ought
to be read-only in hardware).

This is a preparatory patch for XSA-131.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>

Index: xen-4.4.2-testing/tools/qemu-xen-traditional-dir-remote/hw/pass-through.c
===================================================================
--- xen-4.4.2-testing.orig/tools/qemu-xen-traditional-dir-remote/hw/pass-through.c
+++ xen-4.4.2-testing/tools/qemu-xen-traditional-dir-remote/hw/pass-through.c
@@ -577,7 +577,7 @@ static struct pt_reg_info_tbl pt_emu_reg
         .offset     = PCI_EXP_DEVCAP,
         .size       = 4,
         .init_val   = 0x00000000,
-        .ro_mask    = 0x1FFCFFFF,
+        .ro_mask    = 0xFFFFFFFF,
         .emu_mask   = 0x10000000,
         .init       = pt_common_reg_init,
         .u.dw.read  = pt_long_reg_read,

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File xsa131-qemut-5.patch of Package xen.950

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