From patchwork Thu Dec 28 05:54:12 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dongjiu Geng X-Patchwork-Id: 10134395 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 34DF560388 for ; Thu, 28 Dec 2017 05:28:14 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2B4402D57C for ; Thu, 28 Dec 2017 05:28:14 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 201872D58E; Thu, 28 Dec 2017 05:28:14 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A48DF2D57C for ; Thu, 28 Dec 2017 05:28:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751391AbdL1F2J (ORCPT ); Thu, 28 Dec 2017 00:28:09 -0500 Received: from szxga04-in.huawei.com ([45.249.212.190]:3184 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751359AbdL1F1w (ORCPT ); Thu, 28 Dec 2017 00:27:52 -0500 Received: from DGGEMS401-HUB.china.huawei.com (unknown [172.30.72.59]) by Forcepoint Email with ESMTP id 3E2B083F97D76; Thu, 28 Dec 2017 13:27:38 +0800 (CST) Received: from linux.huawei.com (10.67.187.203) by DGGEMS401-HUB.china.huawei.com (10.3.19.201) with Microsoft SMTP Server id 14.3.361.1; Thu, 28 Dec 2017 13:27:30 +0800 From: Dongjiu Geng To: , , , , , , , , , , , , , CC: , , , Subject: [PATCH v14 3/9] docs: APEI GHES generation and CPER record description Date: Thu, 28 Dec 2017 13:54:12 +0800 Message-ID: <1514440458-10515-4-git-send-email-gengdongjiu@huawei.com> X-Mailer: git-send-email 1.7.7 In-Reply-To: <1514440458-10515-1-git-send-email-gengdongjiu@huawei.com> References: <1514440458-10515-1-git-send-email-gengdongjiu@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.67.187.203] X-CFilter-Loop: Reflected Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add APEI/GHES detailed design document Signed-off-by: Dongjiu Geng --- Address Igor's comments to add a doc --- docs/specs/acpi_hest_ghes.txt | 97 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 97 insertions(+) create mode 100644 docs/specs/acpi_hest_ghes.txt diff --git a/docs/specs/acpi_hest_ghes.txt b/docs/specs/acpi_hest_ghes.txt new file mode 100644 index 0000000..fbfc787 --- /dev/null +++ b/docs/specs/acpi_hest_ghes.txt @@ -0,0 +1,97 @@ +APEI tables generating and CPER record +============================= + +Copyright (C) 2017 HuaWei Corporation. + +Design Details: +------------------- + + etc/acpi/tables etc/hardware_errors + ==================== ========================================== ++ +--------------------------+ +-----------------------+ +| | HEST | | address | +--------------+ +| +--------------------------+ | registers | | Error Status | +| | GHES1 | | +---------------------+ | Data Block 1 | +| +--------------------------+ +--------->| |error_block_address1 |----------->| +------------+ +| | ................. | | | +---------------------+ | | CPER | +| | error_status_address-----+-+ +------->| |error_block_address2 |--------+ | | CPER | +| | ................. | | | +---------------------+ | | | .... | +| | read_ack_register--------+-+ | | | .............. | | | | CPER | +| | read_ack_preserve | | | +-----------------------+ | | +------------+ +| | read_ack_write | | | +----->| |error_block_addressN |------+ | | Error Status | ++ +--------------------------+ | | | | +---------------------+ | | | Data Block 2 | +| | GHES2 | +-+-+----->| |read_ack_register1 | | +-->| +------------+ ++ +--------------------------+ | | | +---------------------+ | | | CPER | +| | ................. | | | +--->| |read_ack_register2 | | | | CPER | +| | error_status_address-----+---+ | | | +---------------------+ | | | .... | +| | ................. | | | | | ............. | | | | CPER | +| | read_ack_register--------+-----+-+ | +---------------------+ | +-+------------+ +| | read_ack_preserve | | +->| |read_ack_registerN | | | |.......... | +| | read_ack_write | | | | +---------------------+ | | +------------+ ++ +--------------------------| | | | | Error Status | +| | ............... | | | | | Data Block N | ++ +--------------------------+ | | +---->| +------------+ +| | GHESN | | | | | CPER | ++ +--------------------------+ | | | | CPER | +| | ................. | | | | | .... | +| | error_status_address-----+-----+ | | | CPER | +| | ................. | | +-+------------+ +| | read_ack_register--------+---------+ +| | read_ack_preserve | +| | read_ack_write | ++ +--------------------------+ + +(1) QEMU generates the ACPI HEST table. This table goes in the current + "etc/acpi/tables" fw_cfg blob. Each error source has different + notification type. + +(2) A new fw_cfg blob called "etc/hardware_errors" is introduced. QEMU + also need to populate this blob. The "etc/hardwre_errors" fw_cfg blob + contains one address registers table and one Error Status Data Block + table, all of which are pre-allocated. + +(3) The address registers table contains N Error Block Address entries + and N Read Ack Address entries, the size for each entry is 8-byte. + The Error Status Data Block table contains N Error Status Data Block + entries, the size for each entry is 4096(0x1000) bytes. The total size + for "etc/hardware_errors" fw_cfg blob is (N * 8 * 2 + N * 4096) bytes. + +(4) QEMU generates the ACPI linker/loader script for the firmware + +(4a) The HEST table is part of "etc/acpi/tables", the firmware already + allocates the memory for it, because QEMU already generates an ALLOCATE + linker/loader command for it + +(4b) QEMU creates another ALLOCATE command for the "etc/hardware_errors" + blob. The firmware allocates memory for this blob and downloads it. + +(5) QEMU generates N ADD_POINTER commands, which patch address in the + "error_status_address" fields of the HEST table with a pointer to the + corresponding "address registers" in the downloaded "etc/hardware_errors" + blob. + +(6) QEMU generates N ADD_POINTER commands, which patch address in the + "read_ack_register" fields of the HEST table with a pointer to the + corresponding "address registers" in the downloaded "etc/hardware_errors" blob. + +(7) QEMU generates N ADD_POINTER commands for the firmware, which patch + address in the " error_block_address" fields with a pointer to the + respective "Error Status Data Block" in the downloaded "etc/hardware_errors" + blob. + +(8) QEMU Defines a third and write-only fw_cfg blob which is called + "etc/hardware_errors_addr". Through that blob, the firmware can send back + the guest-side allocation addresses to QEMU. The "etc/hardware_errors_addr" + blob contains a 8-byte entry. QEMU generates a single WRITE_POINTER commands + for the firmware, the firmware will write back the start address of + "etc/hardware_errors" blob to fw_cfg file "etc/hardware_errors_addr". Then + Qemu will know the Error Status Data Block for every error source. Each of + Error Status Data Block has fixed size which is 4096(0x1000). + +(9) When QEMU gets SIGBUS from the kernel, QEMU formats the CPER right into + guest memory, and then injects whatever interrupt (or assert whatever GPIO line) + as a notification which is necessary for notifying the guest. + +(10) This notification (in virtual hardware) will be handled by guest kernel, + guest APEI driver will read the CPER which is recorded by QEMU and do the + recovery.