From nobody Mon Feb 9 17:17:42 2026 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 Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1716428849484430.3032914736865; Wed, 22 May 2024 18:47:29 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1s9xXe-0001hB-AA; Wed, 22 May 2024 21:46:50 -0400 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 1s9xXc-0001fp-SX for qemu-devel@nongnu.org; Wed, 22 May 2024 21:46:48 -0400 Received: from mail.loongson.cn ([114.242.206.163]) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1s9xXY-000131-Dj for qemu-devel@nongnu.org; Wed, 22 May 2024 21:46:48 -0400 Received: from loongson.cn (unknown [10.2.5.185]) by gateway (Coremail) with SMTP id _____8AxjusBoE5mot8CAA--.7852S3; Thu, 23 May 2024 09:46:41 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.185]) by localhost.localdomain (Coremail) with SMTP id AQAAf8AxDMf9n05mSDMGAA--.17472S5; Thu, 23 May 2024 09:46:40 +0800 (CST) From: Song Gao To: qemu-devel@nongnu.org Cc: richard.henderson@linaro.org, Bibo Mao Subject: [PULL 03/10] hw/loongarch: Add VM mode in IOCSR feature register in kvm mode Date: Thu, 23 May 2024 09:46:30 +0800 Message-Id: <20240523014637.614872-4-gaosong@loongson.cn> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20240523014637.614872-1-gaosong@loongson.cn> References: <20240523014637.614872-1-gaosong@loongson.cn> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: AQAAf8AxDMf9n05mSDMGAA--.17472S5 X-CM-SenderInfo: 5jdr20tqj6z05rqj20fqof0/ X-Coremail-Antispam: 1Uk129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7 ZEXasCq-sGcSsGvfJ3UbIjqfuFe4nvWSU5nxnvy29KBjDU0xBIdaVrnUUvcSsGvfC2Kfnx nUUI43ZEXa7xR_UUUUUUUUU== 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=114.242.206.163; envelope-from=gaosong@loongson.cn; 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, 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: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZM-MESSAGEID: 1716428850713100001 Content-Type: text/plain; charset="utf-8" From: Bibo Mao If VM runs in kvm mode, VM mode is added in IOCSR feature register. So guest can detect kvm hypervisor type and enable possible pv functions. Signed-off-by: Bibo Mao Reviewed-by: Song Gao Message-Id: <20240514025109.3238398-1-maobibo@loongson.cn> Signed-off-by: Song Gao --- hw/loongarch/virt.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/hw/loongarch/virt.c b/hw/loongarch/virt.c index f0640d2d80..95f9ed5cae 100644 --- a/hw/loongarch/virt.c +++ b/hw/loongarch/virt.c @@ -10,6 +10,7 @@ #include "qapi/error.h" #include "hw/boards.h" #include "hw/char/serial.h" +#include "sysemu/kvm.h" #include "sysemu/sysemu.h" #include "sysemu/qtest.h" #include "sysemu/runstate.h" @@ -840,18 +841,23 @@ static void virt_iocsr_misc_write(void *opaque, hwadd= r addr, =20 static uint64_t virt_iocsr_misc_read(void *opaque, hwaddr addr, unsigned s= ize) { + uint64_t ret; + switch (addr) { case VERSION_REG: return 0x11ULL; case FEATURE_REG: - return 1ULL << IOCSRF_MSI | 1ULL << IOCSRF_EXTIOI | - 1ULL << IOCSRF_CSRIPI; + ret =3D BIT(IOCSRF_MSI) | BIT(IOCSRF_EXTIOI) | BIT(IOCSRF_CSRIPI); + if (kvm_enabled()) { + ret |=3D BIT(IOCSRF_VM); + } + return ret; case VENDOR_REG: return 0x6e6f73676e6f6f4cULL; /* "Loongson" */ case CPUNAME_REG: return 0x303030354133ULL; /* "3A5000" */ case MISC_FUNC_REG: - return 1ULL << IOCSRM_EXTIOI_EN; + return BIT_ULL(IOCSRM_EXTIOI_EN); } return 0ULL; } --=20 2.34.1