From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:51518) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ePBWa-0004iO-VB for qemu-devel@nongnu.org; Wed, 13 Dec 2017 13:12:57 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ePBWa-0007qC-5p for qemu-devel@nongnu.org; Wed, 13 Dec 2017 13:12:56 -0500 Received: from orth.archaic.org.uk ([2001:8b0:1d0::2]:39130) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1ePBWZ-0007ls-VE for qemu-devel@nongnu.org; Wed, 13 Dec 2017 13:12:56 -0500 Received: from pm215 by orth.archaic.org.uk with local (Exim 4.89) (envelope-from ) id 1ePBWY-0007fz-El for qemu-devel@nongnu.org; Wed, 13 Dec 2017 18:12:54 +0000 From: Peter Maydell Date: Wed, 13 Dec 2017 18:12:15 +0000 Message-Id: <1513188761-20784-18-git-send-email-peter.maydell@linaro.org> In-Reply-To: <1513188761-20784-1-git-send-email-peter.maydell@linaro.org> References: <1513188761-20784-1-git-send-email-peter.maydell@linaro.org> Subject: [Qemu-devel] [PULL 17/43] hw/intc/arm_gicv3_its: Implement full reset List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org From: Eric Auger 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 Reviewed-by: Peter Maydell Message-id: 1511883692-11511-5-git-send-email-eric.auger@redhat.com Signed-off-by: Peter Maydell --- 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 1c663ac..bf290b8 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)) { -- 2.7.4