From patchwork Mon May 27 07:46:40 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bibo Mao X-Patchwork-Id: 13674727 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 582A92232A; Mon, 27 May 2024 07:46:53 +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=1716796015; cv=none; b=f3pjI39kHFWTANadTPDvjmmKfB/KL1T2vmiS3t43syNa6AM4UeNt0vKiaKxCnB8hXN/lMN261O0K8RdDATZ5hJHyj6eYgmZA+Ze5Obqne99YfPLOrHH3q/wpcy4O4GagUBzHJC88oU9ujgDyDPIcihXOl+876I3GIw+qIvh/2M8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716796015; c=relaxed/simple; bh=uRPYeu1g//OQLx04rdY+78NfsbRwAUuTxvQddEsoBHs=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=VBxBXI9e5p8Nw9HYIVU5Cxou3esUaDcUkvfDEOZtXT7AW+56i50pA78+7TQsvHRjGfeMjoiRGPy1cwCvOPvWvfQUDTSG3HnNgVUXSGILpwzzf4A0cwMTW0Yt0fUeIgHD+HvV4J9+s2zI4X4F330dCfsW3tzt2LCyStqxroUUBA4= 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 _____8AxnOplOlRmrB4AAA--.364S3; Mon, 27 May 2024 15:46:45 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.213]) by localhost.localdomain (Coremail) with SMTP id AQAAf8AxTcdlOlRmHuIKAA--.28594S2; Mon, 27 May 2024 15:46:45 +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 v3 0/4] LoongArch: KVM: Add Binary Translation extension support Date: Mon, 27 May 2024 15:46:40 +0800 Message-Id: <20240527074644.836699-1-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: AQAAf8AxTcdlOlRmHuIKAA--.28594S2 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. --- v2 ... v3: 1. Split KVM_LOONGARCH_VM_FEAT_LBT capability checking into three sub-features, KVM_LOONGARCH_VM_FEAT_X86BT/KVM_LOONGARCH_VM_FEAT_ARMBT and KVM_LOONGARCH_VM_FEAT_MIPSBT. Return success only if host supports the sub-feature. 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 | 15 ++++ arch/loongarch/kvm/exit.c | 9 ++ arch/loongarch/kvm/vcpu.c | 121 +++++++++++++++++++++++++- arch/loongarch/kvm/vm.c | 44 +++++++++- 6 files changed, 205 insertions(+), 2 deletions(-) base-commit: 29c73fc794c83505066ee6db893b2a83ac5fac63