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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>
This commit is contained in:
Jan Beulich 2015-06-02 15:07:01 +00:00 committed by Stefano Stabellini
parent 0e7ef22136
commit 45ebe3916a
1 changed files with 1 additions and 1 deletions
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2
hw/xen/xen_pt_config_init.c
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@ -871,7 +871,7 @@ static XenPTRegInfo xen_pt_emu_reg_pcie[] = {
.offset = PCI_EXP_DEVCAP,
.size = 4,
.init_val = 0x00000000,
.ro_mask = 0x1FFCFFFF,
.ro_mask = 0xFFFFFFFF,
.emu_mask = 0x10000000,
.init = xen_pt_common_reg_init,
.u.dw.read = xen_pt_long_reg_read,