From fe44935e35cbf077b3c5ecb114fb90150f4efe23 Mon Sep 17 00:00:00 2001 From: Peter Xu Date: Thu, 18 Aug 2016 03:00:31 +0200 Subject: [PATCH 13/37] intel_iommu: handle interrupt remap enable RH-Author: Peter Xu Message-id: <1471489253-2811-13-git-send-email-peterx@redhat.com> Patchwork-id: 71997 O-Subject: [RHEL-7.3 qemu-kvm-rhev v2 12/34] intel_iommu: handle interrupt remap enable Bugzilla: 1358653 RH-Acked-by: Marcel Apfelbaum RH-Acked-by: Paolo Bonzini RH-Acked-by: Radim Krcmar Handle writting to IRE bit in global command register. Signed-off-by: Peter Xu Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin (cherry picked from commit 80de52ba87d44bf63157900b8dd5ccd5bd795fd4) Signed-off-by: Peter Xu Signed-off-by: Miroslav Rezanina --- hw/i386/intel_iommu.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c index bf74533..6a6cb3b 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 */ -- 1.8.3.1