From patchwork Mon Aug 5 07:35:43 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bibo Mao X-Patchwork-Id: 13753206 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 7413233CA; Mon, 5 Aug 2024 07:35:47 +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=1722843351; cv=none; b=icFW6wbb0ytkEPL+SZKOdyiLtUpnEWxRXUw++twkVYqd+GZz3rGKDWaXABvxdWP1VbDAedAuppvndrxLRfS7UGFYuSRQlmqOUaxASTlpJF0QM83vEMzoD06l7PcjPgtyS4BIHSgjVdquYKe+H7YHc2z9HwsPajn6R+6JOg5+y54= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722843351; c=relaxed/simple; bh=IbpWo76oZEiAmnrd4n1GIFjyldf1Vc/SNlEwkgHYCzY=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=LkBYpYCTKL+FG69vLX2PZEBfkXroUtSkl+7kqvohr8CXZdDNHL5cY2e1Q4lS0AyBUAeria0k+zou1wo7flUHCIkYjy3wzAqX/lUL2pb+7AG9tEBWbmbr9YSS+kFOedFSlzv9/Jf/6Wn7yGVREWRMPviUQknSrSxErSjJHxT0S+c= 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 _____8BxqOnTgLBmIeUHAA--.25443S3; Mon, 05 Aug 2024 15:35:47 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.213]) by front1 (Coremail) with SMTP id qMiowMAxz2fSgLBmaCgEAA--.11106S2; Mon, 05 Aug 2024 15:35:46 +0800 (CST) From: Bibo Mao To: Tianrui Zhao , Huacai Chen , Thomas Gleixner Cc: WANG Xuerui , kvm@vger.kernel.org, loongarch@lists.linux.dev, linux-kernel@vger.kernel.org, virtualization@lists.linux.dev, x86@kernel.org, Song Gao Subject: [PATCH v5 0/3] Add extioi virt extension support Date: Mon, 5 Aug 2024 15:35:43 +0800 Message-Id: <20240805073546.668475-1-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: qMiowMAxz2fSgLBmaCgEAA--.11106S2 X-CM-SenderInfo: xpdruxter6z05rqj20fqof0/ X-Coremail-Antispam: 1Uk129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7 ZEXasCq-sGcSsGvfJ3UbIjqfuFe4nvWSU5nxnvy29KBjDU0xBIdaVrnUUvcSsGvfC2Kfnx nUUI43ZEXa7xR_UUUUUUUUU== KVM_FEATURE_VIRT_EXTIOI is paravirt feature defined with EXTIOI interrupt controller, it can route interrupt to 256 CPUs and cpu interrupt pin IP0-IP7. Now irqchip is emulated in user space rather than kernel space, here interface is provided for VMM to pass this feature to VMM hypervisor. Also interface is provided to VMM to detect and enable/disable paravirt features provided in KVM hypervisor. And api kvm_para_has_feature() is available on LoongArch for device driver to detect paravirt features and do some optimization. --- v4 ... v5: 1. Refresh annotation "WITH Linux-syscall-note" about uapi header file arch/loongarch/include/uapi/asm/kvm_para.h v3 ... v4: 1. Implement function kvm_para_has_feature() on LoongArch platform, and redefine feature with normal number rather than bitmap number, since function kvm_para_has_feature() requires this. 2. Add extioi virt extension support in this patch set. 3. Update extioi virt extension support patch with review comments, including documentation, using kvm_para_has_feature() to detect features etc. v2 ... v3: 1. Add interface to detect and enable/disable paravirt features in KVM hypervisor. 2. Implement function kvm_arch_para_features() for device driver in VM side to detected supported paravirt features. v1 ... v2: 1. Update changelog suggested by WangXuerui. 2. Fix typo issue in function kvm_loongarch_cpucfg_set_attr(), usr_features should be assigned directly, also suggested by WangXueRui. --- Bibo Mao (3): LoongArch: KVM: Enable paravirt feature control from VMM LoongArch: KVM: Implement function kvm_para_has_feature irqchip/loongson-eiointc: Add extioi virt extension support .../arch/loongarch/irq-chip-model.rst | 64 ++++++++++ .../zh_CN/arch/loongarch/irq-chip-model.rst | 55 +++++++++ arch/loongarch/include/asm/irq.h | 1 + arch/loongarch/include/asm/kvm_host.h | 7 ++ arch/loongarch/include/asm/kvm_para.h | 11 ++ arch/loongarch/include/asm/loongarch.h | 13 --- arch/loongarch/include/uapi/asm/Kbuild | 2 - arch/loongarch/include/uapi/asm/kvm.h | 5 + arch/loongarch/include/uapi/asm/kvm_para.h | 24 ++++ arch/loongarch/kernel/paravirt.c | 32 ++--- arch/loongarch/kvm/exit.c | 6 +- arch/loongarch/kvm/vcpu.c | 41 ++++++- arch/loongarch/kvm/vm.c | 43 ++++++- drivers/irqchip/irq-loongson-eiointc.c | 109 ++++++++++++++---- 14 files changed, 355 insertions(+), 58 deletions(-) create mode 100644 arch/loongarch/include/uapi/asm/kvm_para.h base-commit: de9c2c66ad8e787abec7c9d7eff4f8c3cdd28aed