From: Peter Xu <peterx@redhat.com>
Date: Mon, 16 Sep 2019 08:07:18 +0000 (+0800)
Subject: intel_iommu: Remove the caching-mode check during flag change
X-Git-Tag: v4.2.0-rc0~97^2~2
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=e7df189e19e86bf9f4d7aea4c6cf50ac0ebfce46;p=thirdparty%2Fqemu.git

intel_iommu: Remove the caching-mode check during flag change

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>
---

diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index bed8ffe4467..f1de8fdb759 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -2936,10 +2936,6 @@ 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;