From nobody Tue Feb 10 10:59:19 2026 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id D946A24A05C; Mon, 24 Feb 2025 09:56:21 +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=1740390985; cv=none; b=oUmd4s+84dghaSPNAXHZ+d5XjNkIHZ52+0oP94iRNK3WF0VqlE9vrynsmdJQ3EKpM/GGb3aw6CASSC/JuxUVaDoQubh6YBpTDiNxlOrXXCupXAXXaG/+mN6mzKN0+bBaEP0ecM62xG6ueM0HXi1wXw+xv0KCjOfqZUtxu4iKN+c= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740390985; c=relaxed/simple; bh=ELUSK/HZUHvCwY6+pKfb6g9xX5U5riy1F+LdY6xt/HE=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=JksmWV+X2/Lun5XwesyvteQOc6UhrPSJaYobee3Xm7r3nM9vJB8lINN4d4Tb/M3O0xHADa0eEYaTB3TMV612NXjEgKuSGQPjLmLs/IT/e3YEf8B4UzL91OhW95IFSnf2iq2z09Lrnz+L7bhOQxTOFe9e5PYfR+o8vRuWujzxNVQ= 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 _____8DxbKxEQrxnMK+AAA--.24412S3; Mon, 24 Feb 2025 17:56:20 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.213]) by front1 (Coremail) with SMTP id qMiowMBxXsVCQrxnRBkmAA--.9703S5; Mon, 24 Feb 2025 17:56:19 +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 3/3] LoongArch: KVM: Register perf callback for guest Date: Mon, 24 Feb 2025 17:56:18 +0800 Message-Id: <20250224095618.1436016-4-maobibo@loongson.cn> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20250224095618.1436016-1-maobibo@loongson.cn> References: <20250224095618.1436016-1-maobibo@loongson.cn> 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: qMiowMBxXsVCQrxnRBkmAA--.9703S5 X-CM-SenderInfo: xpdruxter6z05rqj20fqof0/ X-Coremail-Antispam: 1Uk129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7 ZEXasCq-sGcSsGvfJ3UbIjqfuFe4nvWSU5nxnvy29KBjDU0xBIdaVrnUUvcSsGvfC2Kfnx nUUI43ZEXa7xR_UUUUUUUUU== Content-Type: text/plain; charset="utf-8" Add selection for GUEST_PERF_EVENTS if KVM is enabled, also add perf callback register when KVM module is loading. Signed-off-by: Bibo Mao --- arch/loongarch/kvm/Kconfig | 1 + arch/loongarch/kvm/main.c | 2 ++ 2 files changed, 3 insertions(+) diff --git a/arch/loongarch/kvm/Kconfig b/arch/loongarch/kvm/Kconfig index 97a811077ac3..40eea6da7c25 100644 --- a/arch/loongarch/kvm/Kconfig +++ b/arch/loongarch/kvm/Kconfig @@ -33,6 +33,7 @@ config KVM select KVM_MMIO select KVM_XFER_TO_GUEST_WORK select SCHED_INFO + select GUEST_PERF_EVENTS if PERF_EVENTS help Support hosting virtualized guest machines using hardware virtualization extensions. You will need diff --git a/arch/loongarch/kvm/main.c b/arch/loongarch/kvm/main.c index f6d3242b9234..4c5af4718182 100644 --- a/arch/loongarch/kvm/main.c +++ b/arch/loongarch/kvm/main.c @@ -387,6 +387,7 @@ static int kvm_loongarch_env_init(void) } =20 kvm_init_gcsr_flag(); + kvm_register_perf_callbacks(NULL); =20 /* Register LoongArch IPI interrupt controller interface. */ ret =3D kvm_loongarch_register_ipi_device(); @@ -408,6 +409,7 @@ static void kvm_loongarch_env_exit(void) { unsigned long addr; =20 + kvm_unregister_perf_callbacks(); if (vmcs) free_percpu(vmcs); =20 --=20 2.39.3