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GET /api/1.1/patches/2228631/?format=api
{ "id": 2228631, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2228631/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260427070029.1059386-4-gaosong@loongson.cn/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/1.1/projects/14/?format=api", "name": "QEMU Development", "link_name": "qemu-devel", "list_id": "qemu-devel.nongnu.org", "list_email": "qemu-devel@nongnu.org", "web_url": "", "scm_url": "", "webscm_url": "" }, "msgid": "<20260427070029.1059386-4-gaosong@loongson.cn>", "date": "2026-04-27T07:00:28", "name": "[3/4] target/loongarch: Add kvm support dintc", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "c49f41f2dc7eee5d8ff62fffadaf894cf45ea238", "submitter": { "id": 82024, "url": "http://patchwork.ozlabs.org/api/1.1/people/82024/?format=api", "name": "Song Gao", "email": "gaosong@loongson.cn" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260427070029.1059386-4-gaosong@loongson.cn/mbox/", "series": [ { "id": 501589, "url": "http://patchwork.ozlabs.org/api/1.1/series/501589/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=501589", "date": "2026-04-27T07:00:28", "name": "LoongArch : Add KVM DINTC support", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/501589/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2228631/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2228631/checks/", "tags": {}, "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; helo=lists1p.gnu.org;\n envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n receiver=patchwork.ozlabs.org)", "Received": [ "from lists1p.gnu.org (lists1p.gnu.org [209.51.188.17])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4g3wBS3bCrz1xvV\n\tfor <incoming@patchwork.ozlabs.org>; Mon, 27 Apr 2026 17:27:26 +1000 (AEST)", "from localhost ([::1] helo=lists1p.gnu.org)\n\tby lists1p.gnu.org with esmtp (Exim 4.90_1)\n\t(envelope-from <qemu-devel-bounces@nongnu.org>)\n\tid 1wHGMg-00069t-5D; Mon, 27 Apr 2026 03:26:46 -0400", "from eggs.gnu.org ([2001:470:142:3::10])\n by lists1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from <gaosong@loongson.cn>)\n id 1wHGMc-000692-4p\n for qemu-devel@nongnu.org; Mon, 27 Apr 2026 03:26:42 -0400", "from mail.loongson.cn ([114.242.206.163])\n by eggs.gnu.org with esmtp (Exim 4.90_1)\n (envelope-from <gaosong@loongson.cn>) id 1wHGMX-000281-45\n for qemu-devel@nongnu.org; Mon, 27 Apr 2026 03:26:41 -0400", "from loongson.cn (unknown [10.2.5.185])\n by gateway (Coremail) with SMTP id _____8BxDuqpD+9pTEQEAA--.14130S3;\n Mon, 27 Apr 2026 15:26:33 +0800 (CST)", "from localhost.localdomain (unknown [10.2.5.185])\n by front1 (Coremail) with SMTP id qMiowJAxHMKbD+9pqJN1AA--.25769S5;\n Mon, 27 Apr 2026 15:26:32 +0800 (CST)" ], "From": "Song Gao <gaosong@loongson.cn>", "To": "maobibo@loongson.cn", "Cc": "qemu-devel@nongnu.org,\n\tlixianglai@loongson.cn,\n\tchenhuacai@loongson.cn", "Subject": "[PATCH 3/4] target/loongarch: Add kvm support dintc", "Date": "Mon, 27 Apr 2026 15:00:28 +0800", "Message-Id": "<20260427070029.1059386-4-gaosong@loongson.cn>", "X-Mailer": "git-send-email 2.39.1", "In-Reply-To": "<20260427070029.1059386-1-gaosong@loongson.cn>", "References": "<20260427070029.1059386-1-gaosong@loongson.cn>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-CM-TRANSID": "qMiowJAxHMKbD+9pqJN1AA--.25769S5", "X-CM-SenderInfo": "5jdr20tqj6z05rqj20fqof0/", "X-Coremail-Antispam": "1Uk129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7\n ZEXasCq-sGcSsGvfJ3UbIjqfuFe4nvWSU5nxnvy29KBjDU0xBIdaVrnUUvcSsGvfC2Kfnx\n nUUI43ZEXa7xR_UUUUUUUUU==", "Received-SPF": "pass client-ip=114.242.206.163;\n envelope-from=gaosong@loongson.cn;\n helo=mail.loongson.cn", "X-Spam_score_int": "-18", "X-Spam_score": "-1.9", "X-Spam_bar": "-", "X-Spam_report": "(-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_NONE=0.001,\n SPF_PASS=-0.001 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": "qemu development <qemu-devel.nongnu.org>", "List-Unsubscribe": "<https://lists.nongnu.org/mailman/options/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>", "List-Archive": "<https://lists.nongnu.org/archive/html/qemu-devel>", "List-Post": "<mailto:qemu-devel@nongnu.org>", "List-Help": "<mailto:qemu-devel-request@nongnu.org?subject=help>", "List-Subscribe": "<https://lists.nongnu.org/mailman/listinfo/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=subscribe>", "Errors-To": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org", "Sender": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org" }, "content": "This patch adds Kvm put/get msgint CSRs and check msgint feature.\n\nSigned-off-by: Song Gao <gaosong@loongson.cn>\n---\n target/loongarch/cpu.c | 5 ++-\n target/loongarch/cpu.h | 1 +\n target/loongarch/kvm/kvm.c | 69 ++++++++++++++++++++++++++++++++++++++\n 3 files changed, 72 insertions(+), 3 deletions(-)", "diff": "diff --git a/target/loongarch/cpu.c b/target/loongarch/cpu.c\nindex e22568c84a..fe60c9b92b 100644\n--- a/target/loongarch/cpu.c\n+++ b/target/loongarch/cpu.c\n@@ -443,9 +443,6 @@ static void loongarch_max_initfn(Object *obj)\n \n cpu->ptw = ON_OFF_AUTO_AUTO;\n if (tcg_enabled()) {\n- cpu->env.cpucfg[1] = FIELD_DP32(cpu->env.cpucfg[1], CPUCFG1, MSG_INT, 1);\n- cpu->msgint = ON_OFF_AUTO_AUTO;\n-\n uint32_t data = cpu->env.cpucfg[2];\n data = FIELD_DP32(data, CPUCFG2, HPTW, 1);\n /* Enable LA v1.1 instructions */\n@@ -456,6 +453,8 @@ static void loongarch_max_initfn(Object *obj)\n data = FIELD_DP32(data, CPUCFG2, SCQ, 1);\n cpu->env.cpucfg[2] = data;\n }\n+ cpu->env.cpucfg[1] = FIELD_DP32(cpu->env.cpucfg[1], CPUCFG1, MSG_INT, 1);\n+ cpu->msgint = ON_OFF_AUTO_AUTO;\n }\n \n #if defined(CONFIG_KVM)\ndiff --git a/target/loongarch/cpu.h b/target/loongarch/cpu.h\nindex 4d333806ed..edd840fbed 100644\n--- a/target/loongarch/cpu.h\n+++ b/target/loongarch/cpu.h\n@@ -302,6 +302,7 @@ enum loongarch_features {\n LOONGARCH_FEATURE_PV_IPI,\n LOONGARCH_FEATURE_STEALTIME,\n LOONGARCH_FEATURE_PTW,\n+ LOONGARCH_FEATURE_MSGINT,\n };\n \n typedef struct LoongArchBT {\ndiff --git a/target/loongarch/kvm/kvm.c b/target/loongarch/kvm/kvm.c\nindex 9d844c4905..e32e5f1274 100644\n--- a/target/loongarch/kvm/kvm.c\n+++ b/target/loongarch/kvm/kvm.c\n@@ -35,6 +35,13 @@ const KVMCapabilityInfo kvm_arch_required_capabilities[] = {\n KVM_CAP_LAST_INFO\n };\n \n+static bool msgint_needed(CPUState *cs)\n+{\n+ LoongArchCPU *cpu = LOONGARCH_CPU(cs);\n+\n+ return FIELD_EX64(cpu->env.cpucfg[1], CPUCFG1, MSG_INT);\n+}\n+\n static int kvm_get_stealtime(CPUState *cs)\n {\n CPULoongArchState *env = cpu_env(cs);\n@@ -358,6 +365,20 @@ static int kvm_loongarch_get_csr(CPUState *cs)\n \n ret |= kvm_loongarch_get_pmu(cs);\n \n+ if (msgint_needed(cs)) {\n+ ret |= kvm_get_one_reg(cs, KVM_IOC_CSRID(LOONGARCH_CSR_MSGIS(0)),\n+ &env->CSR_MSGIS[0]);\n+\n+ ret |= kvm_get_one_reg(cs, KVM_IOC_CSRID(LOONGARCH_CSR_MSGIS(1)),\n+ &env->CSR_MSGIS[1]);\n+\n+ ret |= kvm_get_one_reg(cs, KVM_IOC_CSRID(LOONGARCH_CSR_MSGIS(2)),\n+ &env->CSR_MSGIS[2]);\n+\n+ ret |= kvm_get_one_reg(cs, KVM_IOC_CSRID(LOONGARCH_CSR_MSGIS(3)),\n+ &env->CSR_MSGIS[3]);\n+ }\n+\n ret |= kvm_get_one_reg(cs, KVM_IOC_CSRID(LOONGARCH_CSR_TVAL),\n &env->CSR_TVAL);\n \n@@ -533,6 +554,20 @@ static int kvm_loongarch_put_csr(CPUState *cs, KvmPutState level)\n \n ret |= kvm_loongarch_put_pmu(cs);\n \n+ if (msgint_needed(cs)) {\n+ ret |= kvm_set_one_reg(cs, KVM_IOC_CSRID(LOONGARCH_CSR_MSGIS(0)),\n+ &env->CSR_MSGIS[0]);\n+\n+ ret |= kvm_set_one_reg(cs, KVM_IOC_CSRID(LOONGARCH_CSR_MSGIS(1)),\n+ &env->CSR_MSGIS[1]);\n+\n+ ret |= kvm_set_one_reg(cs, KVM_IOC_CSRID(LOONGARCH_CSR_MSGIS(2)),\n+ &env->CSR_MSGIS[2]);\n+\n+ ret |= kvm_set_one_reg(cs, KVM_IOC_CSRID(LOONGARCH_CSR_MSGIS(3)),\n+ &env->CSR_MSGIS[3]);\n+ }\n+\n /*\n * timer cfg must be put at last since it is used to enable\n * guest timer\n@@ -982,6 +1017,12 @@ static bool kvm_feature_supported(CPUState *cs, enum loongarch_features feature)\n ret = kvm_vm_ioctl(kvm_state, KVM_HAS_DEVICE_ATTR, &attr);\n return (ret == 0);\n \n+ case LOONGARCH_FEATURE_MSGINT:\n+ attr.group = KVM_LOONGARCH_VM_FEAT_CTRL;\n+ attr.attr = KVM_LOONGARCH_VM_FEAT_MSGINT;\n+ ret = kvm_vm_ioctl(kvm_state, KVM_HAS_DEVICE_ATTR, &attr);\n+ return (ret == 0);\n+\n default:\n return false;\n }\n@@ -1155,6 +1196,28 @@ static int kvm_cpu_check_pv_features(CPUState *cs, Error **errp)\n return 0;\n }\n \n+static int kvm_cpu_check_msgint(CPUState *cs, Error **errp)\n+{\n+ CPULoongArchState *env = cpu_env(cs);\n+ LoongArchCPU *cpu = LOONGARCH_CPU(cs);\n+ bool kvm_supported;\n+\n+ kvm_supported = kvm_feature_supported(cs, LOONGARCH_FEATURE_MSGINT);\n+ env->cpucfg[1] = FIELD_DP32(env->cpucfg[1], CPUCFG1, MSG_INT, 0);\n+ if (cpu->msgint == ON_OFF_AUTO_ON) {\n+ if (kvm_supported) {\n+ env->cpucfg[1] = FIELD_DP32(env->cpucfg[1], CPUCFG1, MSG_INT, 1);\n+ } else {\n+ error_setg(errp, \"'msgint' feature not supported by KVM on this host\");\n+ return -ENOTSUP;\n+ }\n+ } else if ((cpu->msgint == ON_OFF_AUTO_AUTO) && kvm_supported) {\n+ env->cpucfg[1] = FIELD_DP32(env->cpucfg[1], CPUCFG1, MSG_INT, 1);\n+ }\n+\n+ return 0;\n+}\n+\n int kvm_arch_pre_create_vcpu(CPUState *cpu, Error **errp)\n {\n return 0;\n@@ -1210,6 +1273,12 @@ int kvm_arch_init_vcpu(CPUState *cs)\n return ret;\n }\n \n+ ret = kvm_cpu_check_msgint(cs, &local_err);\n+ if (ret < 0) {\n+ error_report_err(local_err);\n+ return ret;\n+ }\n+\n return 0;\n }\n \n", "prefixes": [ "3/4" ] }