From mboxrd@z Thu Jan 1 00:00:00 1970 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 69469C04FF6 for ; Fri, 12 Apr 2024 10:39:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=0zOAMiqp0ZFfdiTmEgRgqeVP5pXexYqwwrdGY1KvgW8=; b=yBzdXmifH3f5yD JFljFHRCWBYQ6CbYnPttll8CpZO7hyqzY1KHpuFzxSh1bW+1ofmai+7m6UTP1XjFAM18x6j58IMBm tU0U+1hzzBGiv8Sqjosht/bQQRRO8GQ+hHswLBkMGuH+MwfjhakLzAgTN1ayJ+1ES1ZO0DpHRZy05 xdgYZs4FEwLmuwpuse12QYnBc9bQO+xNDMVqo6cCO5ErtzgUoMpHCA4r2+jYuwkMA1Qj94tpBR3n5 TaQNVN7CAIdVoD5z++Sf/8eE6Fd4XX/IRA2w/Dhsfdj6t19knBZBJfDeFAMUCsUJbs+nKi6QVSlfH +Wpbh2P5pD/W5+AWSOFA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rvEIl-0000000Giwn-2eIC; Fri, 12 Apr 2024 10:38:35 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rvEFX-0000000GgvD-2JoX for linux-arm-kernel@lists.infradead.org; Fri, 12 Apr 2024 10:35:25 +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 9BE161596; Fri, 12 Apr 2024 03:35:44 -0700 (PDT) Received: from ewhatever.cambridge.arm.com (ewhatever.cambridge.arm.com [10.1.197.1]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 9E7BA3F7C5; Fri, 12 Apr 2024 03:35:13 -0700 (PDT) From: Suzuki K Poulose To: kvmarm@lists.linux.dev Cc: kvm@vger.kernel.org, linux-coco@lists.linux.dev, linux-arm-kernel@lists.infradead.org, maz@kernel.org, alexandru.elisei@arm.com, joey.gouly@arm.com, steven.price@arm.com, james.morse@arm.com, oliver.upton@linux.dev, yuzenghui@huawei.com, andrew.jones@linux.dev, eric.auger@redhat.com, Suzuki K Poulose Subject: [kvm-unit-tests PATCH 28/33] arm: realm: Add helpers to decode RSI return codes Date: Fri, 12 Apr 2024 11:34:03 +0100 Message-Id: <20240412103408.2706058-29-suzuki.poulose@arm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240412103408.2706058-1-suzuki.poulose@arm.com> References: <20240412103408.2706058-1-suzuki.poulose@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240412_033515_905091_7C60788A X-CRM114-Status: GOOD ( 11.92 ) 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org RMM encodes error code and index in the result of an operation. Add helpers to decode this information for use with the attestation tests. Signed-off-by: Suzuki K Poulose --- lib/arm64/asm/rsi.h | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/lib/arm64/asm/rsi.h b/lib/arm64/asm/rsi.h index 2566c000..c7d65333 100644 --- a/lib/arm64/asm/rsi.h +++ b/lib/arm64/asm/rsi.h @@ -16,6 +16,39 @@ extern bool rsi_present; +/* + * Logical representation of return code returned by RMM commands. + * Each failure mode of a given command should return a unique return code, so + * that the caller can use it to unambiguously identify the failure mode. To + * avoid having a very large list of enumerated values, the return code is + * composed of a status which identifies the category of the error (for example, + * an address was misaligned), and an index which disambiguates between multiple + * similar failure modes (for example, a command may take multiple addresses as + * its input; the index identifies _which_ of them was misaligned.) + */ +typedef unsigned int status_t; +typedef struct { + status_t status; + unsigned int index; +} return_code_t; + +/* + * Convenience function for creating a return_code_t. + */ +static inline return_code_t make_return_code(unsigned int status, + unsigned int index) +{ + return (return_code_t) {status, index}; +} + +/* + * Unpacks a return code. + */ +static inline return_code_t unpack_return_code(unsigned long error_code) +{ + return make_return_code(error_code & 0xff, error_code >> 8); +} + void arm_rsi_init(void); int rsi_invoke(unsigned int function_id, unsigned long arg0, -- 2.34.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel