From patchwork Thu Nov 23 04:36:15 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Herrenschmidt X-Patchwork-Id: 840670 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=kvm-ppc-owner@vger.kernel.org; receiver=) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3yj67j3f17z9t2M for ; Thu, 23 Nov 2017 15:40:17 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752628AbdKWEkQ (ORCPT ); Wed, 22 Nov 2017 23:40:16 -0500 Received: from gate.crashing.org ([63.228.1.57]:55502 "EHLO gate.crashing.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752513AbdKWEkO (ORCPT ); Wed, 22 Nov 2017 23:40:14 -0500 Received: from pasglop.ozlabs.ibm.com (localhost.localdomain [127.0.0.1]) by gate.crashing.org (8.14.1/8.14.1) with ESMTP id vAN4aMBH027724; Wed, 22 Nov 2017 22:36:38 -0600 From: Benjamin Herrenschmidt To: Paul Mackerras Cc: kvm@vger.kernel.org, kvm-ppc@vger.kernel.org, Benjamin Herrenschmidt Subject: [PATCH v2 07/11] powerpc/xive: Add interrupt flag to disable automatic EOI Date: Thu, 23 Nov 2017 15:36:15 +1100 Message-Id: <20171123043619.15301-7-benh@kernel.crashing.org> X-Mailer: git-send-email 2.14.3 In-Reply-To: <20171123043619.15301-1-benh@kernel.crashing.org> References: <20171123043619.15301-1-benh@kernel.crashing.org> Sender: kvm-ppc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm-ppc@vger.kernel.org This will be used by KVM in order to keep escalation interrupts in the non-EOI (masked) state after they fire. They will be re-enabled directly in HW by KVM when needed. Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/include/asm/xive.h | 3 +++ arch/powerpc/sysdev/xive/common.c | 3 ++- 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/include/asm/xive.h b/arch/powerpc/include/asm/xive.h index f786617ea8b7..e602903c3029 100644 --- a/arch/powerpc/include/asm/xive.h +++ b/arch/powerpc/include/asm/xive.h @@ -58,6 +58,9 @@ struct xive_irq_data { #define XIVE_IRQ_FLAG_EOI_FW 0x10 #define XIVE_IRQ_FLAG_H_INT_ESB 0x20 +/* Special flag set by KVM for excalation interrupts */ +#define XIVE_IRQ_NO_EOI 0x80 + #define XIVE_INVALID_CHIP_ID -1 /* A queue tracking structure in a CPU */ diff --git a/arch/powerpc/sysdev/xive/common.c b/arch/powerpc/sysdev/xive/common.c index 838ebdbfe4c5..40c06110821c 100644 --- a/arch/powerpc/sysdev/xive/common.c +++ b/arch/powerpc/sysdev/xive/common.c @@ -367,7 +367,8 @@ static void xive_irq_eoi(struct irq_data *d) * EOI the source if it hasn't been disabled and hasn't * been passed-through to a KVM guest */ - if (!irqd_irq_disabled(d) && !irqd_is_forwarded_to_vcpu(d)) + if (!irqd_irq_disabled(d) && !irqd_is_forwarded_to_vcpu(d) && + !(xd->flags & XIVE_IRQ_NO_EOI)) xive_do_source_eoi(irqd_to_hwirq(d), xd); /*