From 01ab894f9d19a03aee876b0d1b468f7314765539 Mon Sep 17 00:00:00 2001
From: Peter Xu <peterx@redhat.com>
Date: Wed, 9 Oct 2019 12:39:47 +0100
Subject: [PATCH 21/22] intel_iommu: Remove the caching-mode check during flag
 change

RH-Author: Peter Xu <peterx@redhat.com>
Message-id: <20191009123947.21505-6-peterx@redhat.com>
Patchwork-id: 91349
O-Subject: [RHEL-8.2.0 qemu-kvm PATCH 5/5] intel_iommu: Remove the caching-mode check during flag change
Bugzilla: 1738440
RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
RH-Acked-by: Auger Eric <eric.auger@redhat.com>
RH-Acked-by: Alex Williamson <alex.williamson@redhat.com>

That's never a good place to stop QEMU process... Since now we have
both the machine done sanity check and also the hotplug handler, we
can safely remove this to avoid that.

Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <20190916080718.3299-5-peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit e7df189e19e86bf9f4d7aea4c6cf50ac0ebfce46)
Signed-off-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
---
 hw/i386/intel_iommu.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index 44d19cc..a4190bf 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -2561,10 +2561,6 @@ static void vtd_iommu_notify_flag_changed(IOMMUMemoryRegion *iommu,
     VTDAddressSpace *vtd_as = container_of(iommu, VTDAddressSpace, iommu);
     IntelIOMMUState *s = vtd_as->iommu_state;
 
-    if (!s->caching_mode && new & IOMMU_NOTIFIER_MAP) {
-        vtd_panic_require_caching_mode();
-    }
-
     /* Update per-address-space notifier flags */
     vtd_as->notifier_flags = new;
 
-- 
1.8.3.1