Commit c4ff1e68 authored by Jan Beulich's avatar Jan Beulich Committed by Stefano Stabellini
Browse files

xen/pt: correctly handle PM status bit 



xen_pt_pmcsr_reg_write() needs an adjustment to deal with the RW1C
nature of the not passed through bit 15 (PCI_PM_CTRL_PME_STATUS).

This is a preparatory patch for XSA-131.

Signed-off-by: default avatarJan Beulich <jbeulich@suse.com>
Reviewed-by: default avatarStefano Stabellini <stefano.stabellini@eu.citrix.com>
parent d61bb248

hw/xen/xen_pt_config_init.c

+2 −1
Original line number Diff line number Diff line
@@ -948,7 +948,8 @@ static int xen_pt_pmcsr_reg_write(XenPCIPassthroughState *s, 


    /* create value for writing to I/O device register */

    throughable_mask = ~reg->emu_mask & valid_mask;

    *val = XEN_PT_MERGE_VALUE(*val, dev_value, throughable_mask);

    *val = XEN_PT_MERGE_VALUE(*val, dev_value & ~PCI_PM_CTRL_PME_STATUS,

                              throughable_mask);



    return 0;

}