From nobody Tue Oct 7 19:55:41 2025 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id EFD191BD9F0; Mon, 7 Jul 2025 03:51:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=114.242.206.163 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751860314; cv=none; b=XNjUj2q53SiExEUg9SlLzILw51kSIT4/yFFxmaM2eU1QGnR4qhyWth4HGALWMC/EG3bJ45swdzQc1zoCINp+bSSxzEDRIznz5z2Iaj6KENCRt3G5oq/uI5WJK3uHBN1FZ2o+ILsgqoG3UjpXOYSqJV0L7QxLU4/jWT4W3Xk1418= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751860314; c=relaxed/simple; bh=Y5A6Iyc032Pc2f/tiQhfEjDTEEYWG84EtKu1fDLhGIg=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=gCRKthNjJIzgdmniD6JLwhOVV1vAZlJMKtLYYIEP7qSU2xjM3+TVHZFtmJ/abKO68rvfSilE5Jkb8HzxgJax5jcSFjJQiao2tKbI3bNhwD6cFJ2cd16GmzweqWF8k5xAy7JeOAHZzQUdUj2tH4lBzhtuWRjakNwimjNtXzq8yV0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn; spf=pass smtp.mailfrom=loongson.cn; arc=none smtp.client-ip=114.242.206.163 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=loongson.cn Received: from loongson.cn (unknown [10.2.5.213]) by gateway (Coremail) with SMTP id _____8DxbKxURGtoZEkjAQ--.10962S3; Mon, 07 Jul 2025 11:51:48 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.213]) by front1 (Coremail) with SMTP id qMiowJCxM+RPRGtoZlsMAA--.6231S2; Mon, 07 Jul 2025 11:51:44 +0800 (CST) From: Bibo Mao To: Tianrui Zhao , Huacai Chen Cc: WANG Xuerui , kvm@vger.kernel.org, loongarch@lists.linux.dev, linux-kernel@vger.kernel.org Subject: [PATCH] LoongArch: KVM: Add some feature detection on host with 3C6000 Date: Mon, 7 Jul 2025 11:51:43 +0800 Message-Id: <20250707035143.1979013-1-maobibo@loongson.cn> X-Mailer: git-send-email 2.39.3 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: qMiowJCxM+RPRGtoZlsMAA--.6231S2 X-CM-SenderInfo: xpdruxter6z05rqj20fqof0/ X-Coremail-Antispam: 1Uk129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7 ZEXasCq-sGcSsGvfJ3UbIjqfuFe4nvWSU5nxnvy29KBjDU0xBIdaVrnUUvcSsGvfC2Kfnx nUUI43ZEXa7xR_UUUUUUUUU== Content-Type: text/plain; charset="utf-8" With 3C6000 hardware platform, hardware page table walking and avec features are supported on host. Here add these two feature detection on KVM host. Signed-off-by: Bibo Mao Reviewed-by: Yanteng Si --- arch/loongarch/include/uapi/asm/kvm.h | 2 ++ arch/loongarch/kvm/vm.c | 8 ++++++++ 2 files changed, 10 insertions(+) diff --git a/arch/loongarch/include/uapi/asm/kvm.h b/arch/loongarch/include= /uapi/asm/kvm.h index 5f354f5c6847..0b9feb6c0d53 100644 --- a/arch/loongarch/include/uapi/asm/kvm.h +++ b/arch/loongarch/include/uapi/asm/kvm.h @@ -103,6 +103,8 @@ struct kvm_fpu { #define KVM_LOONGARCH_VM_FEAT_PMU 5 #define KVM_LOONGARCH_VM_FEAT_PV_IPI 6 #define KVM_LOONGARCH_VM_FEAT_PV_STEALTIME 7 +#define KVM_LOONGARCH_VM_FEAT_PTW 8 +#define KVM_LOONGARCH_VM_FEAT_AVEC 9 =20 /* Device Control API on vcpu fd */ #define KVM_LOONGARCH_VCPU_CPUCFG 0 diff --git a/arch/loongarch/kvm/vm.c b/arch/loongarch/kvm/vm.c index edccfc8c9cd8..728b24a62f1e 100644 --- a/arch/loongarch/kvm/vm.c +++ b/arch/loongarch/kvm/vm.c @@ -146,6 +146,14 @@ static int kvm_vm_feature_has_attr(struct kvm *kvm, st= ruct kvm_device_attr *attr if (kvm_pvtime_supported()) return 0; return -ENXIO; + case KVM_LOONGARCH_VM_FEAT_PTW: + if (cpu_has_ptw) + return 0; + return -ENXIO; + case KVM_LOONGARCH_VM_FEAT_AVEC: + if (cpu_has_avecint) + return 0; + return -ENXIO; default: return -ENXIO; } --=20 2.39.3