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From c79d36500fdf74bbc87b2475b3a95648ee2dff8a Mon Sep 17 00:00:00 2001
From: Peter Xu <peterx@redhat.com>
Date: Thu, 8 Nov 2018 06:29:35 +0000
Subject: [PATCH 07/35] intel_iommu: introduce vtd_reset_caches()

RH-Author: Peter Xu <peterx@redhat.com>
Message-id: <20181108062938.21143-5-peterx@redhat.com>
Patchwork-id: 82963
O-Subject: [RHEL-8 qemu-kvm PATCH 4/7] intel_iommu: introduce vtd_reset_caches()
Bugzilla: 1625173
RH-Acked-by: Auger Eric <eric.auger@redhat.com>
RH-Acked-by: Michael S. Tsirkin <mst@redhat.com>
RH-Acked-by: Laurent Vivier <lvivier@redhat.com>

Bugzilla: 1625173

Provide the function and use it in vtd_init().  Used to reset both
context entry cache and iotlb cache for the whole IOMMU unit.

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit 06aba4ca52fd2c8718b8ba486f22f0aa7c99ed55)
Signed-off-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
---
 hw/i386/intel_iommu.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index aab86e9..48d0ba3 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -227,6 +227,14 @@ static void vtd_reset_iotlb(IntelIOMMUState *s)
     vtd_iommu_unlock(s);
 }
 
+static void vtd_reset_caches(IntelIOMMUState *s)
+{
+    vtd_iommu_lock(s);
+    vtd_reset_iotlb_locked(s);
+    vtd_reset_context_cache_locked(s);
+    vtd_iommu_unlock(s);
+}
+
 static uint64_t vtd_get_iotlb_key(uint64_t gfn, uint16_t source_id,
                                   uint32_t level)
 {
@@ -3160,10 +3168,7 @@ static void vtd_init(IntelIOMMUState *s)
         s->cap |= VTD_CAP_CM;
     }
 
-    vtd_iommu_lock(s);
-    vtd_reset_context_cache_locked(s);
-    vtd_reset_iotlb_locked(s);
-    vtd_iommu_unlock(s);
+    vtd_reset_caches(s);
 
     /* Define registers with default values and bit semantics */
     vtd_define_long(s, DMAR_VER_REG, 0x10UL, 0, 0);
-- 
1.8.3.1