From nobody Tue Nov 26 10:29:29 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=nongnu.org ARC-Seal: i=1; a=rsa-sha256; t=1708529498; cv=none; d=zohomail.com; s=zohoarc; b=Be73NqsfvSHk9d6pLKicdxRM11Gi6CwpaB7nnMQkX8JZa9vcBX0GGQ8gCathoTVp8NEIu5L5TMi8H9CWdcjvNI1zYnVBAeLCX/lelXleExJWRlnFvVlp474afeN0Yt4PUWSdEeWTiB1vJrozInX6KhJz/w9Yd+TAfzx2PbDn1uc= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1708529498; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:Reply-To:Reply-To:References:Sender:Subject:Subject:To:To:Message-Id; bh=2Ns3jJVa3WHE3aSvWEK4dFoMMDmgIuee48wRg+FOqxo=; b=GCz4x18xGW8Nh7YJQW8wKO8A5fsRNeFxTjlQXVPVu8L3bgmuw/8LFgx0vlezJe+U9SvltINcjmKr5FAq7Ss9PuRVSQ0J9i+f4mvYqUgbLmV/DbBxyVRZp++L2r27A6X/wTCHPppwpv4dDLONTQAj+UmRL6P8l/f+EgHyMR0p9tU= ARC-Authentication-Results: i=1; mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1708529498262658.0424757599551; Wed, 21 Feb 2024 07:31:38 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rcoVw-00053b-Lr; Wed, 21 Feb 2024 10:28:04 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rcoNL-0003Wj-5E; Wed, 21 Feb 2024 10:19:11 -0500 Received: from szxga04-in.huawei.com ([45.249.212.190]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rcmM2-0004uC-DP; Wed, 21 Feb 2024 08:09:44 -0500 Received: from mail.maildlp.com (unknown [172.19.163.44]) by szxga04-in.huawei.com (SkyGuard) with ESMTP id 4TfxQB5bv9z2BdDw; Wed, 21 Feb 2024 21:07:30 +0800 (CST) Received: from kwepemi500008.china.huawei.com (unknown [7.221.188.139]) by mail.maildlp.com (Postfix) with ESMTPS id B66BA140154; Wed, 21 Feb 2024 21:09:39 +0800 (CST) Received: from huawei.com (10.67.174.55) by kwepemi500008.china.huawei.com (7.221.188.139) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.35; Wed, 21 Feb 2024 21:09:39 +0800 To: , , , , , , CC: Subject: [RFC PATCH v2 21/22] hw/intc/arm_gicv3: Implement NMI interrupt prioirty Date: Wed, 21 Feb 2024 13:08:22 +0000 Message-ID: <20240221130823.677762-22-ruanjinjie@huawei.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240221130823.677762-1-ruanjinjie@huawei.com> References: <20240221130823.677762-1-ruanjinjie@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [10.67.174.55] X-ClientProxiedBy: dggems706-chm.china.huawei.com (10.3.19.183) To kwepemi500008.china.huawei.com (7.221.188.139) Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=45.249.212.190; envelope-from=ruanjinjie@huawei.com; helo=szxga04-in.huawei.com X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-to: Jinjie Ruan From: Jinjie Ruan via Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZM-MESSAGEID: 1708529498806100003 Content-Type: text/plain; charset="utf-8" If GICD_CTLR_DS bit is zero and the NMI is non-secure, the NMI prioirty is higher than 0x80, otherwise it is higher than 0x0. And save NMI super prioirty information in hppi.superprio to deliver NMI exception. Since both GICR and GICD can deliver NMI, it is both necessary to check whether the pending irq is NMI in gicv3_redist_update_noirqset and gicv3_update_noirqset. And In irqbetter(), only a non-NMI with the same priority and a smaller interrupt number can be preempted but not NMI. Signed-off-by: Jinjie Ruan --- hw/intc/arm_gicv3.c | 61 +++++++++++++++++++++++++++++++++++++++------ 1 file changed, 54 insertions(+), 7 deletions(-) diff --git a/hw/intc/arm_gicv3.c b/hw/intc/arm_gicv3.c index 0b8f79a122..e3281cffdc 100644 --- a/hw/intc/arm_gicv3.c +++ b/hw/intc/arm_gicv3.c @@ -21,7 +21,7 @@ #include "hw/intc/arm_gicv3.h" #include "gicv3_internal.h" =20 -static bool irqbetter(GICv3CPUState *cs, int irq, uint8_t prio) +static bool irqbetter(GICv3CPUState *cs, int irq, uint8_t prio, bool is_nm= i) { /* Return true if this IRQ at this priority should take * precedence over the current recorded highest priority @@ -33,11 +33,21 @@ static bool irqbetter(GICv3CPUState *cs, int irq, uint8= _t prio) if (prio < cs->hppi.prio) { return true; } + + /* + * Current highest prioirity pending interrupt is not a NMI + * and the new IRQ is a NMI with same priority. + */ + if (prio =3D=3D cs->hppi.prio && !cs->hppi.superprio && is_nmi) { + return true; + } + /* If multiple pending interrupts have the same priority then it is an * IMPDEF choice which of them to signal to the CPU. We choose to * signal the one with the lowest interrupt number. */ - if (prio =3D=3D cs->hppi.prio && irq <=3D cs->hppi.irq) { + if (prio =3D=3D cs->hppi.prio && !cs->hppi.superprio && + !is_nmi && irq <=3D cs->hppi.irq) { return true; } return false; @@ -141,6 +151,8 @@ static void gicv3_redist_update_noirqset(GICv3CPUState = *cs) uint8_t prio; int i; uint32_t pend; + bool is_nmi =3D 0; + uint32_t superprio =3D 0; =20 /* Find out which redistributor interrupts are eligible to be * signaled to the CPU interface. @@ -152,10 +164,26 @@ static void gicv3_redist_update_noirqset(GICv3CPUStat= e *cs) if (!(pend & (1 << i))) { continue; } - prio =3D cs->gicr_ipriorityr[i]; - if (irqbetter(cs, i, prio)) { + superprio =3D extract32(cs->gicr_isuperprio, i, 1); + + /* NMI */ + if (superprio) { + is_nmi =3D 1; + + /* DS =3D 0 & Non-secure NMI */ + if ((!(cs->gic->gicd_ctlr & GICD_CTLR_DS)) && + extract32(cs->gicr_igroupr0, i, 1)) + prio =3D 0x80; + else + prio =3D 0x0; + } else { + is_nmi =3D 0; + prio =3D cs->gicr_ipriorityr[i]; + } + if (irqbetter(cs, i, prio, is_nmi)) { cs->hppi.irq =3D i; cs->hppi.prio =3D prio; + cs->hppi.superprio =3D is_nmi; seenbetter =3D true; } } @@ -168,7 +196,7 @@ static void gicv3_redist_update_noirqset(GICv3CPUState = *cs) if ((cs->gicr_ctlr & GICR_CTLR_ENABLE_LPIS) && cs->gic->lpi_enable && (cs->gic->gicd_ctlr & GICD_CTLR_EN_GRP1NS) && (cs->hpplpi.prio !=3D 0xff)) { - if (irqbetter(cs, cs->hpplpi.irq, cs->hpplpi.prio)) { + if (irqbetter(cs, cs->hpplpi.irq, cs->hpplpi.prio, false)) { cs->hppi.irq =3D cs->hpplpi.irq; cs->hppi.prio =3D cs->hpplpi.prio; cs->hppi.grp =3D cs->hpplpi.grp; @@ -212,7 +240,9 @@ static void gicv3_update_noirqset(GICv3State *s, int st= art, int len) { int i; uint8_t prio; + bool is_nmi =3D 0; uint32_t pend =3D 0; + uint32_t superprio =3D 0; =20 assert(start >=3D GIC_INTERNAL); assert(len > 0); @@ -240,10 +270,27 @@ static void gicv3_update_noirqset(GICv3State *s, int = start, int len) */ continue; } - prio =3D s->gicd_ipriority[i]; - if (irqbetter(cs, i, prio)) { + + superprio =3D *gic_bmp_ptr32(s->superprio, i); + /* NMI */ + if (superprio & (1 << (i & 0x1f))) { + is_nmi =3D 1; + + /* DS =3D 0 & Non-secure NMI */ + if ((!(s->gicd_ctlr & GICD_CTLR_DS)) && + gicv3_gicd_group_test(s, i)) + prio =3D 0x80; + else + prio =3D 0x0; + } else { + is_nmi =3D 0; + prio =3D s->gicd_ipriority[i]; + } + + if (irqbetter(cs, i, prio, is_nmi)) { cs->hppi.irq =3D i; cs->hppi.prio =3D prio; + cs->hppi.superprio =3D is_nmi; cs->seenbetter =3D true; } } --=20 2.34.1