From patchwork Tue Sep 24 15:20:52 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Heyi Guo X-Patchwork-Id: 11159071 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7726A13B1 for ; Tue, 24 Sep 2019 15:22:30 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 5566F20665 for ; Tue, 24 Sep 2019 15:22:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="IBkK/7oa" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5566F20665 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:To :From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=VHXgKQLfqTJfSZQip3Lhx93ABDNmwS6NsXxI/saC7X4=; b=IBkK/7oa03JraH TyqLvrVBcV2LW2DX1cSQxazeXxwPMdaybo/MtA8GWk0tI72Gve1k+c8CK3lZvudyYty5Box3wT9b9 J+QGN9Oo+gp550iPnRLDSJW2/ZU3gzjxrHkpxHTc9q/MlyRmkJkfuLvWUo2ksFRf8v2DR49ouK6oq cSS9JiW20gtaW37h06LTs82XMDD+KpZhSJfe3My6dacEQeLHcEhm4AB+rQPNPbneckAMxZM6/XCUL K1n/GK0WBxcEobofqY/okXowjBVEXPJzKEp8XZvCKlh5Z4+53U0SgW1xSRn1KiBFsaMpAD3WZbHmd 5tBpC2Jd3x7zPGHxdJjQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.2 #3 (Red Hat Linux)) id 1iCme5-0002Kd-27; Tue, 24 Sep 2019 15:22:29 +0000 Received: from szxga06-in.huawei.com ([45.249.212.32] helo=huawei.com) by bombadil.infradead.org with esmtps (Exim 4.92.2 #3 (Red Hat Linux)) id 1iCme2-0002JX-8r for linux-arm-kernel@lists.infradead.org; Tue, 24 Sep 2019 15:22:28 +0000 Received: from DGGEMS401-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id 19DE9F71006A9E2A596B; Tue, 24 Sep 2019 23:22:19 +0800 (CST) Received: from linux-Bxxcye.huawei.com (10.175.104.222) by DGGEMS401-HUB.china.huawei.com (10.3.19.201) with Microsoft SMTP Server id 14.3.439.0; Tue, 24 Sep 2019 23:22:09 +0800 From: Heyi Guo To: , , , , Subject: [RFC PATCH 0/2] Add virtual SDEI support for arm64 Date: Tue, 24 Sep 2019 23:20:52 +0800 Message-ID: <1569338454-26202-1-git-send-email-guoheyi@huawei.com> X-Mailer: git-send-email 1.8.3.1 MIME-Version: 1.0 X-Originating-IP: [10.175.104.222] X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190924_082226_495430_FD3E4372 X-CRM114-Status: UNSURE ( 9.86 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -2.3 (--) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-2.3 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [45.249.212.32 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record -0.0 SPF_HELO_PASS SPF: HELO matches SPF record X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Peter Maydell , Marc Zyngier , James Morse , Heyi Guo , wanghaibin.wang@huawei.com, Dave Martin Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org As promised, this is the first RFC patch set for arm64 virtual SDEI support. New kvm capability KVM_CAP_FORWARD_HYPERCALL is added to probe if kvm supports forwarding hypercalls, and the capability should be enabled explicitly. PSCI can be set as exception for backward compatibility. We reuse the existing term "hypercall" for SMC/HVC, as well as the hypercall structure in kvm_run to exchange arguments and return values. The definition on arm64 is as below: exit_reason: KVM_EXIT_HYPERCALL Input: nr: the immediate value of SMC/HVC calls; not really used today. args[6]: x0..x5 (This is not fully conform with SMCCC which requires x6 as argument as well, but use space can use GET_ONE_REG ioctl for such rare case). Return: args[0..3]: x0..x3 as defined in SMCCC. We need to extract args[0..3] and write them to x0..x3 when hypercall exit returns. And there is a corresponding patch set for qemu. Please give your comments and suggestions. Thanks, HG Cc: Peter Maydell Cc: Dave Martin Cc: Marc Zyngier Cc: Mark Rutland Cc: James Morse Heyi Guo (2): kvm/arm: add capability to forward hypercall to user space kvm/arm64: expose hypercall_forwarding capability arch/arm/include/asm/kvm_host.h | 5 +++++ arch/arm64/include/asm/kvm_host.h | 5 +++++ arch/arm64/kvm/reset.c | 25 +++++++++++++++++++++++++ include/kvm/arm_psci.h | 1 + include/uapi/linux/kvm.h | 3 +++ virt/kvm/arm/arm.c | 2 ++ virt/kvm/arm/psci.c | 30 ++++++++++++++++++++++++++++-- 7 files changed, 69 insertions(+), 2 deletions(-)