diff options
Diffstat (limited to 'hw/i386/intel_iommu.c')
| -rw-r--r-- | hw/i386/intel_iommu.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c index bf74533240..6a6cb3be8d 100644 --- a/hw/i386/intel_iommu.c +++ b/hw/i386/intel_iommu.c @@ -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 */ |