qemu-devel
[Top][All Lists]
Advanced

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Qemu-devel] [PATCH v5 4/4] hw/intc/arm_gicv3_its: Implement full reset


From: Eric Auger
Subject: [Qemu-devel] [PATCH v5 4/4] hw/intc/arm_gicv3_its: Implement full reset
Date: Fri, 24 Nov 2017 15:18:27 +0100

Voiding the ITS caches is not supposed to happen via
individual register writes. So we introduced a dedicated
ITS KVM device ioctl to perform a cold reset of the ITS:
KVM_DEV_ARM_VGIC_GRP_CTRL/KVM_DEV_ARM_ITS_CTRL_RESET. Let's
use this latter if the kernel supports it.

Signed-off-by: Eric Auger <address@hidden>
---
 hw/intc/arm_gicv3_its_kvm.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/hw/intc/arm_gicv3_its_kvm.c b/hw/intc/arm_gicv3_its_kvm.c
index 8e307c9..bad593f 100644
--- a/hw/intc/arm_gicv3_its_kvm.c
+++ b/hw/intc/arm_gicv3_its_kvm.c
@@ -204,7 +204,14 @@ static void kvm_arm_its_reset(DeviceState *dev)
 
     c->parent_reset(dev);
 
-    error_report("ITS KVM: full reset is not supported by QEMU");
+    if (kvm_device_check_attr(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
+                               KVM_DEV_ARM_ITS_CTRL_RESET)) {
+        kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
+                          KVM_DEV_ARM_ITS_CTRL_RESET, NULL, true, 
&error_abort);
+        return;
+    }
+
+    error_report("ITS KVM: full reset is not supported by the host kernel");
 
     if (!kvm_device_check_attr(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
                                GITS_CTLR)) {
-- 
2.5.5




reply via email to

[Prev in Thread] Current Thread [Next in Thread]