From patchwork Tue May 21 02:45:54 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bibo Mao X-Patchwork-Id: 13668809 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id BF5252CAB; Tue, 21 May 2024 02:46:07 +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=1716259570; cv=none; b=AsIPZoCmxR+rVbSHIRt3v2FjrSilTnAjRMXp7nf3614CKs8OXRfVKRRWWY4ccWJR+42INhiriserHx7J+JbFz6b8cIgx9Q9zogP0dMeAt83ZOXqNvahvE7p5icH/+S2B06mjLn5sg1ZmD2fw2R/tgs/mrO7Y97FeJLV4Hp3hoac= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716259570; c=relaxed/simple; bh=YD4wh2WZRW/jyu8qIATM5gSWoF9yUhPX1JDPYJj10Aw=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=PonCRlqq1mEPwofHfuv3Ef9uR+/b+VFT4bqoPGuyX7KtMvRBV3QJGSkWHdKNhEJKv/sU9eULJUNCI13rb4OD5cUciW5Gu6RZ9PM0nL+Q0RTirkLL3K0SI0vCMxNChkM2JL787gEDgWMo1EcGPH8EdC2pnGPbYIXOGdrVwGq25bQ= 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 _____8DxPOvmCkxmbxoBAA--.2867S3; Tue, 21 May 2024 10:45:58 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.213]) by localhost.localdomain (Coremail) with SMTP id AQAAf8BxHMfkCkxm764CAA--.9740S2; Tue, 21 May 2024 10:45:57 +0800 (CST) From: Bibo Mao To: Tianrui Zhao , Huacai Chen Cc: Juergen Gross , kvm@vger.kernel.org, loongarch@lists.linux.dev, linux-kernel@vger.kernel.org, x86@kernel.org, virtualization@lists.linux.dev Subject: [PATCH v3 0/2] LoongArch: Add steal time support Date: Tue, 21 May 2024 10:45:54 +0800 Message-Id: <20240521024556.419436-1-maobibo@loongson.cn> X-Mailer: git-send-email 2.39.3 Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-CM-TRANSID: AQAAf8BxHMfkCkxm764CAA--.9740S2 X-CM-SenderInfo: xpdruxter6z05rqj20fqof0/ X-Coremail-Antispam: 1Uk129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7 ZEXasCq-sGcSsGvfJ3UbIjqfuFe4nvWSU5nxnvy29KBjDU0xBIdaVrnUUvcSsGvfC2Kfnx nUUI43ZEXa7xR_UUUUUUUUU== Para-virt feature steal time is added in both kvm and guest kernel side. It is silimar with other architectures, steal time structure comes from guest memory, also pseduo register is used to save/restore base address of steal time structure, so that vm migration is supported also. --- v2 ... v3: 1. Solve code confliction based on the kernel 6.9.0 2. Add kernel parameter no-steal-acc support on LoongArch with file Documentation/admin-guide/kernel-parameters.txt 3. Add strict checking with pv stealtimer gpa address in function kvm_save_notify() and kvm_loongarch_pvtime_set_attr() v1 ... v2: 1. Add PARAVIRT_TIME_ACCOUNTING kconfig option in file arch/loongarch/Kconfig 2. Function name change such as replace pv_register_steal_time with pv_enable_steal_time etc --- Bibo Mao (2): LoongArch: KVM: Add steal time support in kvm side LoongArch: Add steal time support in guest side .../admin-guide/kernel-parameters.txt | 2 +- arch/loongarch/Kconfig | 11 ++ arch/loongarch/include/asm/kvm_host.h | 7 + arch/loongarch/include/asm/kvm_para.h | 10 ++ arch/loongarch/include/asm/kvm_vcpu.h | 4 + arch/loongarch/include/asm/loongarch.h | 1 + arch/loongarch/include/asm/paravirt.h | 5 + arch/loongarch/include/uapi/asm/kvm.h | 4 + arch/loongarch/kernel/paravirt.c | 131 ++++++++++++++++++ arch/loongarch/kernel/time.c | 2 + arch/loongarch/kvm/exit.c | 38 ++++- arch/loongarch/kvm/vcpu.c | 124 +++++++++++++++++ 12 files changed, 336 insertions(+), 3 deletions(-) base-commit: 3c999d1ae3c75991902a1a7dad0cb62c2a3008b4