From patchwork Fri Oct 4 15:27:49 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steven Price X-Patchwork-Id: 13822591 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 635C51B4244; Fri, 4 Oct 2024 15:30:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728055826; cv=none; b=JHRBCFb6AVeEdBJO+c8nbf5WCfg1BF2EwpoEaytLlNtVDMOpppCGqZwDgw2CGhIyCeGtBLLRbC1cjySZKX8ErO7ppQ34nyKIQqxKOwqxNCMSx0ugRcIyFm3t0QX/Ji+XvlCOOYfC+RkVfcdExNBIcp4Ze+ZaW2OEDmvpH69XcnA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728055826; c=relaxed/simple; bh=9xstbXxh3sXe0qdNECplKckKPwHkmR709Z2mLd4pI0E=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=fvuMIX78YNhHzLM5Yu/u2VZBEiUnasOOAqH0l6lT9qTyEKZ0zmvpU0MyVjfHxVPGos7a0HSNUDdc2FiS+EbXatAmy+PHH3FQZH13jVRPtkbAc4FknDt5q4+jn9AZzaqNl4W80ybgRVfDf7/xTXEhMgUDbWVhUghXrhuYia7rIO8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com 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 82E38150C; Fri, 4 Oct 2024 08:30:54 -0700 (PDT) Received: from e122027.cambridge.arm.com (unknown [10.1.25.25]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id B2F823F640; Fri, 4 Oct 2024 08:30:20 -0700 (PDT) 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 v5 28/43] arm64: rme: support RSI_HOST_CALL Date: Fri, 4 Oct 2024 16:27:49 +0100 Message-Id: <20241004152804.72508-29-steven.price@arm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241004152804.72508-1-steven.price@arm.com> References: <20241004152804.72508-1-steven.price@arm.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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 1ddbff123149..06ec0d7867d0 100644 --- a/arch/arm64/kvm/rme-exit.c +++ b/arch/arm64/kvm/rme-exit.c @@ -115,6 +115,26 @@ static int rec_exit_ripas_change(struct kvm_vcpu *vcpu) return 0; } +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; @@ -176,6 +196,8 @@ 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",