Commit 80de52ba authored by Peter Xu's avatar Peter Xu Committed by Michael S. Tsirkin
Browse files

intel_iommu: handle interrupt remap enable 



Handle writting to IRE bit in global command register.

Signed-off-by: default avatarPeter Xu <peterx@redhat.com>
Reviewed-by: default avatarMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
parent a5861439

hw/i386/intel_iommu.c

+20 −0
Original line number Diff line number Diff line
@@ -1183,6 +1183,22 @@ static void vtd_handle_gcmd_te(IntelIOMMUState *s, bool en) 
    }

}



/* Handle Interrupt Remap Enable/Disable */

static void vtd_handle_gcmd_ire(IntelIOMMUState *s, bool en)

{

    VTD_DPRINTF(CSR, "Interrupt Remap Enable %s", (en ? "on" : "off"));



    if (en) {

        s->intr_enabled = true;

        /* Ok - report back to driver */

        vtd_set_clear_mask_long(s, DMAR_GSTS_REG, 0, VTD_GSTS_IRES);

    } else {

        s->intr_enabled = false;

        /* Ok - report back to driver */

        vtd_set_clear_mask_long(s, DMAR_GSTS_REG, VTD_GSTS_IRES, 0);

    }

}



/* Handle write to Global Command Register */

static void vtd_handle_gcmd_write(IntelIOMMUState *s)

{
@@ -1207,6 +1223,10 @@ static void vtd_handle_gcmd_write(IntelIOMMUState *s) 
        /* Set/update the interrupt remapping root-table pointer */

        vtd_handle_gcmd_sirtp(s);

    }

    if (changed & VTD_GCMD_IRE) {

        /* Interrupt remap enable/disable */

        vtd_handle_gcmd_ire(s, val & VTD_GCMD_IRE);

    }

}



/* Handle write to Context Command Register */