From patchwork Thu Feb 13 16:14:08 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steven Price X-Patchwork-Id: 13973742 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 606F6C021A0 for ; Thu, 13 Feb 2025 17:06:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=e8aOo2E9wZJmqTskkD9OWprK3N+1qD2CSrtncMDcFDw=; b=KT7vyw+NFxnuVAMrpgRRqfdJ+t oQnizKHwAQaFF0ulxBEoyiT1T6Y3lz/dcBGBVsMIzGn7/gEX6sh/NXsjRjZYoam20cfe+RYOblbWm csRy2cQ3im1rMdJAHHiKq2YgkX3efii3m9rrlHWHDRWSYi+s4P80UjNJ5D+9v0maJ65F4QlCKuXDg NOXjdjxdOtVb6xgJ78yzDSLMNL9JY35nevwU+ITiSs9nuz88w39pXDs4Q9m6vyfm1KzaU1C1ukheL J8dKxPz0EgUIUND4NCQwGy1NQwXscr4ksIqCa4nmkS4uzunEnUmKwsNqOgSuxEJ4anJq33guOqV+Q 2AVOHHTw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1ticfe-0000000Bwas-3ya7; Thu, 13 Feb 2025 17:06:38 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tibtS-0000000Bj0P-1Qxw for linux-arm-kernel@lists.infradead.org; Thu, 13 Feb 2025 16:16:52 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 0F04B26BA; Thu, 13 Feb 2025 08:17:10 -0800 (PST) Received: from e122027.cambridge.arm.com (e122027.cambridge.arm.com [10.1.32.44]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 44FB73F6A8; Thu, 13 Feb 2025 08:16:45 -0800 (PST) From: Steven Price To: kvm@vger.kernel.org, kvmarm@lists.linux.dev Cc: Joey Gouly , Catalin Marinas , Marc Zyngier , Will Deacon , James Morse , Oliver Upton , Suzuki K Poulose , Zenghui Yu , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Alexandru Elisei , Christoffer Dall , Fuad Tabba , linux-coco@lists.linux.dev, Ganapatrao Kulkarni , Gavin Shan , Shanker Donthineni , Alper Gun , "Aneesh Kumar K . V" , Steven Price Subject: [PATCH v7 28/45] arm64: rme: support RSI_HOST_CALL Date: Thu, 13 Feb 2025 16:14:08 +0000 Message-ID: <20250213161426.102987-29-steven.price@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250213161426.102987-1-steven.price@arm.com> References: <20250213161426.102987-1-steven.price@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250213_081650_423399_F16C306A X-CRM114-Status: GOOD ( 12.14 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Joey Gouly Forward RSI_HOST_CALLS to KVM's HVC handler. Signed-off-by: Joey Gouly Signed-off-by: Steven Price --- Changes since v4: * Setting GPRS is now done by kvm_rec_enter() rather than rec_exit_host_call() (see previous patch - arm64: RME: Handle realm enter/exit). This fixes a bug where the registers set by user space were being ignored. --- arch/arm64/kvm/rme-exit.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/arch/arm64/kvm/rme-exit.c b/arch/arm64/kvm/rme-exit.c index c785005f821f..4f7602aa3c6c 100644 --- a/arch/arm64/kvm/rme-exit.c +++ b/arch/arm64/kvm/rme-exit.c @@ -107,6 +107,26 @@ static int rec_exit_ripas_change(struct kvm_vcpu *vcpu) return -EFAULT; } +static int rec_exit_host_call(struct kvm_vcpu *vcpu) +{ + int ret, i; + struct realm_rec *rec = &vcpu->arch.rec; + + vcpu->stat.hvc_exit_stat++; + + for (i = 0; i < REC_RUN_GPRS; i++) + vcpu_set_reg(vcpu, i, rec->run->exit.gprs[i]); + + ret = kvm_smccc_call_handler(vcpu); + + if (ret < 0) { + vcpu_set_reg(vcpu, 0, ~0UL); + ret = 1; + } + + return ret; +} + static void update_arch_timer_irq_lines(struct kvm_vcpu *vcpu) { struct realm_rec *rec = &vcpu->arch.rec; @@ -168,6 +188,8 @@ int handle_rec_exit(struct kvm_vcpu *vcpu, int rec_run_ret) return rec_exit_psci(vcpu); case RMI_EXIT_RIPAS_CHANGE: return rec_exit_ripas_change(vcpu); + case RMI_EXIT_HOST_CALL: + return rec_exit_host_call(vcpu); } kvm_pr_unimpl("Unsupported exit reason: %u\n",