diff mbox series

[PULL,7/7] hw/intc/arm_gicv3_its: Don't abort on table save failure

Message ID 1510061722-14092-8-git-send-email-peter.maydell@linaro.org
State Accepted
Commit 8a7348b5d62d7ea16807e6bea54b448a0184bb0f
Headers show
Series target-arm queue | expand

Commit Message

Peter Maydell Nov. 7, 2017, 1:35 p.m. UTC 
From: Eric Auger <eric.auger@redhat.com>


The ITS is not fully properly reset at the moment. Caches are
not emptied.

After a reset, in case we attempt to save the state before
the bound devices have registered their MSIs and after the
1st level table has been allocated by the ITS driver
(device BASER is valid), the first level entries are still
invalid. If the device cache is not empty (devices registered
before the reset), vgic_its_save_device_tables fails with -EINVAL.
This causes a QEMU abort().

Cc: qemu-stable@nongnu.org
Signed-off-by: Eric Auger <eric.auger@redhat.com>

Reported-by: wanghaibin <wanghaibin.wang@huawei.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

---
 hw/intc/arm_gicv3_its_kvm.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

-- 
2.7.4
diff mbox series

Patch

diff --git a/hw/intc/arm_gicv3_its_kvm.c b/hw/intc/arm_gicv3_its_kvm.c
index 9b00ce5..6fb45df 100644
--- a/hw/intc/arm_gicv3_its_kvm.c
+++ b/hw/intc/arm_gicv3_its_kvm.c
@@ -64,20 +64,16 @@  static void vm_change_state_handler(void *opaque, int running,
 {
     GICv3ITSState *s = (GICv3ITSState *)opaque;
     Error *err = NULL;
-    int ret;
 
     if (running) {
         return;
     }
 
-    ret = kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
-                            KVM_DEV_ARM_ITS_SAVE_TABLES, NULL, true, &err);
+    kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
+                      KVM_DEV_ARM_ITS_SAVE_TABLES, NULL, true, &err);
     if (err) {
         error_report_err(err);
     }
-    if (ret < 0 && ret != -EFAULT) {
-        abort();
-    }
 }
 
 static void kvm_arm_its_realize(DeviceState *dev, Error **errp)