From patchwork Thu May 23 03:10:19 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bibo Mao X-Patchwork-Id: 13671227 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 78F3913A41C; Thu, 23 May 2024 03:10:31 +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=1716433834; cv=none; b=eQMNGNSM1pyTiP4YyXOSLjeFu6Mrr97JzP37tj3ksEve2iXgF0hDv5BM2uvyuq4bSl4YREHxseUTRwK1UIt3v7i3URW7vfpb7BjpvWEgfRtJSRXw9D5ZxAoElFUEM+HxBq9wVWzxQrtmeOFd+zwkgisDq6gTpqxHgeueBkUZZRg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716433834; c=relaxed/simple; bh=rkWd1LiZOCPGNFseKQ4iQdbeUewChv9rFdE/pH6zKqU=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=aAUGGdTRCnVSk75kvDYMB7gOnCpy+n1NtfPkrLmJ9vBjfk7mLI+cMmpfecbaKxBjLpaMyPuxyZ0L2Oh1t3W2PPrYjGjAL9n2KVkeQQTR8rdbvUHsXBO8OF+B8p04fL+F6Jz5gd4hfwBxiV7FBnd4rjiwh1E7Q7yQzu+CJiKXZA0= 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 _____8AxEK+fs05mUeQCAA--.2565S3; Thu, 23 May 2024 11:10:23 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.213]) by localhost.localdomain (Coremail) with SMTP id AQAAf8DxNMWfs05mCEQGAA--.6973S2; Thu, 23 May 2024 11:10:23 +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 v2 0/4] LoongArch: KVM: Add Binary Translation extension support Date: Thu, 23 May 2024 11:10:19 +0800 Message-Id: <20240523031023.709347-1-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: AQAAf8DxNMWfs05mCEQGAA--.6973S2 X-CM-SenderInfo: xpdruxter6z05rqj20fqof0/ X-Coremail-Antispam: 1Uk129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7 ZEXasCq-sGcSsGvfJ3UbIjqfuFe4nvWSU5nxnvy29KBjDU0xBIdaVrnUUvcSsGvfC2Kfnx nUUI43ZEXa7xR_UUUUUUUUU== Loongson Binary Translation (LBT) is used to accelerate binary translation, which contains 4 scratch registers (scr0 to scr3), x86/ARM eflags (eflags) and x87 fpu stack pointer (ftop). Like FPU extension, here late enabling method is used for LBT. LBT context is saved/restored on vcpu context switch path. Also this patch set BT capability detection, and BT register get/set interface for userspace vmm, so that vm supports migration with BT extension. --- v1 ... v2: 1. With LBT register read or write interface to userpace, replace device attr method with KVM_GET_ONE_REG method, since lbt register is vcpu register and can be added in kvm_reg_list in future. 2. Add vm device attr ctrl marcro KVM_LOONGARCH_VM_FEAT_CTRL, it is used to get supported LBT feature before vm or vcpu is created. --- Bibo Mao (4): LoongArch: KVM: Add HW Binary Translation extension support LoongArch: KVM: Add LBT feature detection with cpucfg LoongArch: KVM: Add vm migration support for LBT registers LoongArch: KVM: Add VM LBT feature detection support arch/loongarch/include/asm/kvm_host.h | 8 ++ arch/loongarch/include/asm/kvm_vcpu.h | 10 +++ arch/loongarch/include/uapi/asm/kvm.h | 13 +++ arch/loongarch/kvm/exit.c | 9 ++ arch/loongarch/kvm/vcpu.c | 121 +++++++++++++++++++++++++- arch/loongarch/kvm/vm.c | 34 +++++++- 6 files changed, 193 insertions(+), 2 deletions(-) base-commit: 29c73fc794c83505066ee6db893b2a83ac5fac63