From c08c3fbb2bb8494738fd34ec8fc9dc434ce82f4b Mon Sep 17 00:00:00 2001
From: Eric Auger <eric.auger@redhat.com>
Date: Wed, 2 Feb 2022 12:16:02 +0100
Subject: [PATCH 12/12] hw/arm/smmuv3: Fix device reset

RH-Author: Eric Auger <eric.auger@redhat.com>
RH-MergeRequest: 72: hw/arm/smmuv3: Fix device reset
RH-Commit: [1/1] 2cfee2f7a03692681224fed96bb4f28406bf460a (eauger1/centos-qemu-kvm)
RH-Bugzilla: 2042481
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Acked-by: Peter Xu <peterx@redhat.com>
RH-Acked-by: Andrew Jones <drjones@redhat.com>

branch: c9s
Brew: 42958737
Upstream: yes

We currently miss a bunch of register resets in the device reset
function. This sometimes prevents the guest from rebooting after
a system_reset (with virtio-blk-pci). For instance, we may get
the following errors:

invalid STE
smmuv3-iommu-memory-region-0-0 translation failed for iova=0x13a9d2000(SMMU_EVT_C_BAD_STE)
Invalid read at addr 0x13A9D2000, size 2, region '(null)', reason: rejected
invalid STE
smmuv3-iommu-memory-region-0-0 translation failed for iova=0x13a9d2000(SMMU_EVT_C_BAD_STE)
Invalid write at addr 0x13A9D2000, size 2, region '(null)', reason: rejected
invalid STE

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Message-id: 20220202111602.627429-1-eric.auger@redhat.com
Fixes: 10a83cb988 ("hw/arm/smmuv3: Skeleton")
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
(cherry picked from commit 43530095e18fd16dcd51a4b385ad2a22c36f5698)
Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
 hw/arm/smmuv3.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/hw/arm/smmuv3.c b/hw/arm/smmuv3.c
index 01b60bee49..1b5640bb98 100644
--- a/hw/arm/smmuv3.c
+++ b/hw/arm/smmuv3.c
@@ -276,6 +276,12 @@ static void smmuv3_init_regs(SMMUv3State *s)
     s->features = 0;
     s->sid_split = 0;
     s->aidr = 0x1;
+    s->cr[0] = 0;
+    s->cr0ack = 0;
+    s->irq_ctrl = 0;
+    s->gerror = 0;
+    s->gerrorn = 0;
+    s->statusr = 0;
 }
 
 static int smmu_get_ste(SMMUv3State *s, dma_addr_t addr, STE *buf,
-- 
2.27.0