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intel_iommu: handle interrupt remap enable 

Handle writting to IRE bit in global command register.

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Peter Xu 2016-07-14 13:56:19 +08:00 committed by Michael S. Tsirkin
parent a58614391d
commit 80de52ba87
1 changed files with 20 additions and 0 deletions
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20
hw/i386/intel_iommu.c
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@ -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 */